RU224464U1 - POWER INVERTER MODULE FOR ELECTRICAL COMPLEXES AND ELECTRICAL ENERGY CONVERSION SYSTEMS - Google Patents

Abstract

The utility model relates to the field of electrical engineering and can be used for the design and production of highly efficient power inverter modules used in various industries, such as shipbuilding, power generation and electric transport. The technical result of the utility model is to increase the efficiency and reliability of the operation of a three-level power inverter module in high-power converters at high switching currents by increasing the efficiency and reliability of the snubber circuits and the possibility of equalizing and distributing electrical voltages of the semiconductor elements of the clamping structure. The specified technical result is achieved in a three-level power inverter module for electrical complexes and electrical energy conversion systems, containing the first, second, third and fourth controlled semiconductor devices of the clamping structure, the first and second blocks of snubber capacitors, the first and second clamping force control blocks connected in a certain way, first and second clamping semiconductor diodes of the clamping structure, first, second, third and fourth electrical insulators, first and second blocks of snubber heat exchange resistors, first and second blocks of equalizing heat exchange resistors, first, second, third, fourth, fifth, sixth and seventh flexible insulated conductive busbars, first and second blocks of control drivers, first and second blocks of disc springs, first and second blocks of insulated tension struts, first, second, third, fourth, fifth sixth, seventh, eighth and ninth conductive hydraulic heat exchangers, block of hydraulic cooling manifolds . 14 n.p. f-ly, 11 ill.

Description

Field of technology to which the utility model relates

The proposed utility model relates to the field of electrical engineering and can be used for the design and production of highly efficient power inverter modules used in the construction of autonomous voltage inverters that are part of electrical complexes and electrical energy conversion systems in various industries, such as shipbuilding, power generation and electric transport.

State of the art

A phase module for a semiconductor power converter is known (see EU patent EP 3244715 A1, M. class H05K 7/14 (2006.01), H01L 25/11 (2006.01), published 11/15/2017), which consists of two or more connected parallel inverter half-bridges based on controlled semiconductor IGBT elements with freewheeling diodes. The corresponding DC power inputs of each controlled inverter half-bridge of the phase module are connected by buses to the terminals of the DC link capacitor, and the corresponding outputs of the phase module are combined and form the output bus of the phase module. This phase module, according to its circuit design, allows for two-level conversion of DC to AC electricity. Due to the parallel connection of the power terminals of inverter half-bridges, the phase module provides the ability to increase the current capacity of the module to increase the power of the phase of the converter (inverter) in which it is planned to use this phase module. The design features of the relative arrangement of the buses make it possible to reduce the influence of internal parasitic inductances of the module half-bridges and reduce switching overvoltages on the controlled semiconductor IGBT elements. However, despite the technical result described above, the phase module does not allow three-level conversion of direct voltage electricity into alternating voltage, which leads to an increase in the coefficient of nonlinear distortion and a decrease in the quality of the output voltage and current when the module operates as part of autonomous voltage inverters of electricity conversion systems. The absence of high-speed snubber circuits in the phase module at certain parameters of the inductance of the buses connecting the DC link capacitor with the corresponding DC voltage inputs of the phase module will lead to the occurrence of increased pulsed switching overvoltages, which will significantly worsen the electrical and thermal parameters of the controlled semiconductor elements, reduce the service life and may lead to failure of the phase module. In addition, the module design has serious limitations on its use, since the design does not provide for the possibility of cooling controlled semiconductor IGBT elements and does not make it possible to use highly efficient controlled semiconductor devices of a press pack design, which, due to the implementation of power electrical contacts of devices under pressure, could would significantly increase the permissible current and power of the module. The impossibility of using controllable semiconductor press pack devices and the absence of a cooling system at certain current and power values will lead to overheating of the semiconductor elements of the module, which will require limiting the permissible current and power and will not allow the effective use of the phase module in converters. To ensure the required current and power while maintaining the safe operation parameters of the phase module, it becomes necessary to parallelize a large number of inverter half-bridges while simultaneously reducing the IGBT switching frequency to avoid overheating of the controlled semiconductor elements. In power conversion systems with a power of megawatts and tens of megawatts, the use of such phase modules leads to an unjustified increase in the number of controlled semiconductor IGBT elements, a decrease in reliability, a complication of phase module control systems, a decrease in the effective overall current density and power of electrical equipment, as well as its quality.

A power module and a method for constructing the structure of a power module are known (see PRC patent CN 104145336 A, M. class H01L 25/00 (2006.01), published on November 12, 2014), which consists of the first, second third and fourth controlled semiconductor connected in series devices of a clamping structure (first, second, third and fourth UPPPK), first, second, third and fourth drivers for controlling semiconductor devices, first second, third, fourth, fifth, sixth, seventh and eighth conductive metal coolers for cooling controlled semiconductor devices, first and second insulators (upper and lower), first, second, third, fourth and fifth flexible conductive busbars, combining and pressing the module elements together, a static clamping device connected to the first and second insulators and consisting of a first and second (upper and lower) clamping panel, first and second tie rods.

In this power module, unlike the previous analogue, the constructive possibility of using highly efficient devices of a clamping design (press pack) as controlled semiconductor devices is realized, which, using a static clamping device for implementing power electrical contacts of devices under pressure, significantly increase the permissible current and power of the power supply. module compared to the previous analogue. In addition, the module design also provides for the possibility of two-way cooling of controlled semiconductor devices using coolers, which expands the scope of application, makes it possible to increase the efficiency of using the module in high-power devices and, at high current loads, reduce the temperature of the crystals of controlled semiconductor devices. This in turn increases the reliability, quality and effective overall current and power density of the electrical equipment in which the power module is planned to be used. Through the use of flexible conductive busbars, the power module ensures high-quality electrical contacts of external connections under possible vibration influences. However, despite the technical result described above, the power module has a number of significant disadvantages. The circuit design used in the power module does not allow for three-level conversion of DC to AC electricity, which will lead to an increase in the coefficient of nonlinear distortion and a decrease in the quality of the output voltage and current when the module operates as part of autonomous voltage inverters of power conversion systems. The absence of resistive equalizing circuits in the power module will create an uneven distribution of voltage between controlled semiconductor devices, and can lead to failure of individual controlled semiconductor devices to which, without equalizing circuits, a maximum voltage above the permissible value can be applied during switching. The absence of high-speed snubber circuits in the power module at high values of switching currents can lead to increased pulse switching overvoltages, which will significantly worsen the thermal and electrical operating parameters of controlled semiconductor devices, create additional thermal losses, reduce reliability, service life and can lead to failure controlled semiconductor devices included in the power module. The module's clamping device is static, which does not allow it to take into account thermal changes in the geometry of the metal components of the module and stabilize the magnitude of the clamping force, as well as maintain the quality of external and internal electrical connections of press pack controlled semiconductor devices over the entire operating temperature range. Thus, changes in the temperature of the controlled semiconductor devices of the power module due to changes in the current and power of the module during operation will lead to a thermal change in the geometric dimensions of the semiconductor devices and metal coolers. In this case, the use of a static clamping device will not allow taking into account and compensating for these changes in geometry, which will lead to a sharp exit of the compression force of the press pack devices beyond the required operating range. Thus, a decrease in temperature will cause a sharp decrease in the pressing force, deterioration in the quality of external and internal electrical connections, will lead to an increase in electrical losses, a drop in efficiency, overheating of the crystals inside the press pack devices, and an increase in temperature will cause a sharp increase in the pressing force, which at certain values can destroy the internal the structure of crystals and other elements inside the package of semiconductor devices press pack clamping structure.

A semiconductor module for a converter with snubber capacitors is known (see US patent US 20160218615 A1, M. class N02M 1/34 (2006.01), H01L 29/74 (2006.01), H01L 29/739 (2006.01), H01L 29/749 ( 2006.01), H01L 23/495 (2006.01), H01L 23/50 (2006.01) publ. 07.28.2016). According to an embodiment of the circuit design and layout solutions, the semiconductor module is connected by power electrical inputs to the outputs of a constant voltage source or DC link capacitors with a midpoint and includes the first, second, third and fourth controlled semiconductor devices of the clamping structure (first, second, third, fourth UPPK), first, second, third, fourth and fifth conductive metal coolers for passive air cooling of semiconductor devices, first and second semiconductor snubber diodes, first and second uncooled snubber resistors, first and second inductive snubber elements, first and second blocks of snubber capacitors ( the first and second BSK), each of which may contain two or more parallel-connected capacitors, the common points of which are connected through U-shaped buses with the third cooler, a static clamping device that combines and presses the module elements together and contains upper and lower insulated clamping elements and two tension rods. The power electrical inputs of the semiconductor module are connected to the electrical outputs of the constant voltage source and/or the capacitors of the midpoint DC link, wherein the first power electrical input of the semiconductor module is connected to the first electrical input of the first inductive snubber element and to the first electrical input of the first uncooled snubber resistor. the output of which is connected to the electrical input of the first BSK and the electrical output of the first snubber diode, the electrical input of which is connected to the electrical output of the first inductive snubber element and to the electrical input of the first conductive metal cooler, the electric heat exchange output of which is connected to the electric heat exchange input of the first UPPK, the electric heat exchange output of which is connected to the electric heat exchange input of the second conductive metal cooler, the electrical output of which is the first power electrical output of the semiconductor module, and the electric heat exchange output of the second conductive metal cooler is connected to the electric heat exchange input of the second UPPK, the electric heat exchange output of which is connected to the electric heat exchange input of the third conductive metal cooler, one of the electrical outputs of which is connected to the electrical output of the first BSK, the second power electrical input of the semiconductor module, the electrical input of the second BSK, the electric heat exchange output of the third conductive metal cooler is connected to the electric heat exchange input of the third UPPK, the electric heat exchange output of which is connected to the electric heat exchange input of the fourth conductive metal cooler, one of the electrical outputs of which is the second output of the semiconductor module, and the electric heat exchange output of the fourth conductive metal cooler is connected to the electric heat exchange input of the fourth UPPK, the electric heat exchange output of which is connected to the electric heat exchange input of the fifth conductive metal cooler, the electric output of which is connected to the electrical output of the second semiconductor snubber diode and the electrical output of the second inductive snubber element, electric the input of which is connected to the third power input of the semiconductor module and to the electrical input of the second uncooled snubber resistor, the electrical output of which is connected to the electrical input of the second semiconductor snubber diode and the electrical output of the second BSK, while the static clamping device is connected to the first (upper) and fifth (lower) ) conductive metal coolers.

The design of this semiconductor module, as well as the previous analogue, implements the design possibility of using high-performance devices of a clamping design (press pack) as controlled semiconductor devices, which, using a static clamping device for implementing power electrical contacts of devices under pressure, increase the permissible current value and power module power. Also, as in the previous analogue, the design of the module provides for double-sided cooling of the UPPK using coolers, which allows the module to be used in more powerful power conversion systems. Moreover, unlike previous analogues, this semiconductor module implements RLCD snubber circuits, which provide a reduction in pulsed switching overvoltages and improve the thermal and electrical operating parameters of the UPPK in a certain range, reduce switching losses, and increase the reliability and service life of the semiconductor module. The use of U-shaped buses connecting the capacitors of the first and second BSK ensures the preservation of high-quality external connections when the position of the capacitors changes, for example, with possible vibration effects during operation. However, despite the technical result described above, the semiconductor module has a number of significant disadvantages. The circuit design used in the semiconductor module does not allow for three-level conversion of DC to AC electricity, which leads to an increase in the coefficient of nonlinear distortion and a decrease in the quality of the output voltage and current when the module operates as part of autonomous voltage inverters of power conversion systems. Snubber circuits made in the form of two RLCD snubbers are applicable exclusively for low-power converters with low switching currents, when the required inductance value of the inductive snubber element that limits the reverse recovery current of the snubber diode is small and does not affect the overvoltage levels on the switched controlled semiconductor devices. In powerful megawatt converters at high switching currents, reaching several thousand amperes, both the forward current and the reverse recovery current of the snubber diode increase, as a result of which the required inductance value of the inductive snubber element increases significantly, which leads to an increase in overvoltage levels on the switched UPPK when they shutdown and may cause failure of the semiconductor module. The absence of any cooling of the first and second snubber resistors will lead to overheating of the resistors during operation and failure of the snubber circuits, and the use of semiconductor diodes in the snubber circuits reduces the reliability of the module and requires additional cooling of the snubber diodes as well. The absence in the module design of the possibility of installing drivers for controlling semiconductor devices is associated with the need to place the drivers at a distance from the module and devices, which in converters leads to additional inductive interference and interference in the electrical control circuits, which will have to connect the control drivers located separately from the module with the UPPK. The absence of resistive equalizing circuits in the module for certain combinations of switching on the UPPPC will create an uneven distribution of the DC voltage source voltage between the UPPPCs and can lead to failure of individual UPPPCs to which, without equalizing circuits, during switching the maximum full voltage of the constant voltage source will be applied, which may be higher than the permissible one for USPPK values. The module has limitations on the duration of continuous operation, since the metal conductive coolers used use the surrounding air as a cooling medium, while heat is transferred from the coolers to the cooling medium passively by radiation. This method of air cooling is dependent on the ambient temperature, ineffectively and slowly carries out cooling and heat removal from the UPPK and is operational only at very low ambient temperatures and relatively low power and current loads of the module. The use of this cooling method at normal and elevated air temperatures in rooms and electrical equipment cabinets will not allow the semiconductor module to operate in long-term mode; interruptions in operation will be required to reduce the temperature of semiconductor devices to acceptable values, which reduces the efficiency of using electricity conversion systems in which it is planned to install this semiconductor module. The clamping device of the module, like in the previous analogue, is static, which does not allow taking into account thermal changes in the geometry of the metal components of the module and stabilizing the amount of clamping force in the required range, as well as maintaining the quality of the external and internal electrical connections of the UPPK over the entire range of operating temperatures. The use of a static clamping device during thermal changes in the geometry of metal elements will lead to a sharp exit of the compression force of the UPPK beyond the required operating range, which, with a decrease in temperature, will cause a sharp decrease in the clamping force and will lead to a deterioration in the quality of external and internal electrical connections, an increase in electrical losses and a decrease in efficiency , will provoke overheating of the crystals inside the UPPK, and as the temperature increases, there will be a sharp increase in the pressing force, which, at certain values, can destroy the internal structure of the crystals and other elements inside the UPPK case.

This semiconductor module was chosen as a prototype.

Disclosure of the essence of the utility model

The achieved technical result of the proposed utility model is to increase the efficiency and reliability of the operation of a three-level power inverter module in powerful converters at high switching currents by increasing the efficiency and reliability of the snubber circuits and the possibility of equalizing and distributing electrical voltages of the semiconductor elements of the clamping structure.

Achievement of the specified technical result is ensured in the proposed three-level power inverter module for electrical complexes and electrical energy conversion systems (hereinafter referred to as the power inverter module), power electrical inputs connected to the outputs of a constant voltage source, implemented in the form of DC link capacitors with a midpoint, and containing the first, second, third and fourth controllable semiconductor devices of the clamping structure (UPPPK, English press pack), the first and second blocks of snubber capacitors (the first and second BSK), each of which can contain two or more parallel-connected capacitors, differing in that the first and second clamping force control units (first and second BKPU), first and second clamping semiconductor diodes of the clamping structure (first and second FPDK), first, second, third and fourth electrical insulators (first second, third and fourth EI) have been introduced , the first and second blocks of snubber heat exchange resistors (first and second BUTR), the first and second blocks of equalizing heat exchange resistors (first and second BUTR), the first, second, third, fourth, fifth, sixth and seventh flexible insulated conductive busbars (first, second , third, fourth, fifth, sixth and seventh GITS), the first and second blocks of control drivers (first and second BDU), each of which contains two local control drivers (LDU), the first and second blocks of disc springs (first and second BCP ), the first and second blocks of tightening insulated racks (the first and second BSIS), each of which contains two tightening insulated racks, the first, second, third, fourth, fifth, sixth, seventh, eighth and ninth conductive hydraulic heat exchangers (first, second , third, fourth, fifth, sixth, seventh, eighth and ninth TGTA), a block of hydraulic cooling manifolds (BGKO) containing input and output cooling manifolds, while the corresponding two mounting outputs of the first BKPU are connected to the corresponding two mounting inputs of the first LSIC, the other two corresponding fastening inputs of which are connected to the corresponding two fastening outputs of the second BKPU, another corresponding fastening output of which is connected to the corresponding fastening input of the BGKO, another corresponding fastening input of which is connected to another corresponding fastening output of the first BKPU, another corresponding fastening output of which is connected to the input the first BTP, the output of which is connected to the input of the first EI, the output of which is connected to one of the electrical inputs of the first TGTA, the other electrical input of which is the first power electrical input of the power inverter module, and the electric heat exchange output of the first TGTA is connected to the electric heat exchange input of the first UPPK, the electric heat exchange output of which connected to the electric heat exchange input of the second TGTA, the electric heat exchange output of which is connected to the electric heat exchange input of the first FPDK, the electric heat exchange output of which is connected to the electric heat exchange input of the third TGTA, the electrical output of which is connected to the input of the second EI, the output of which is connected to the electrical input of the fourth TGTA, the electric heat exchange output of which is connected to electric heat exchange input of the second UPPK, and one of the electrical outputs of the fourth TGTA is connected to one of the electrical inputs of the first GGTS, another electrical input of which is connected to the electrical output of the first BUTR, the electrical and heat exchange inputs of which are connected to the corresponding electrical and heat exchange outputs of the fifth TGTA, another electric the output of which is the power electrical output of the inverter module for connecting the load, and the electric heat exchange input of the fifth TGTA is connected to the electric heat exchange output of the second UPPK, and the electric heat exchange output of the fifth TGTA is connected to the electric heat exchange input of the third UPPK, another electrical and another heat exchange outputs of the fifth TGTA are connected to the corresponding electrical and the heat exchange inputs of the second BUTR, the electrical output of which is connected to the electrical input of the second GGTS, the other electrical input of which is connected to one of the electrical outputs of the sixth TGTA, the other electrical output of which is connected to the input of the third EI, the output of which is connected to the electrical input of the seventh TGTA, electric heat exchange output which is connected to the electric heat exchange input of the second FPDPC, the electric heat exchange output of which is connected to the electric heat exchange input of the eighth TGTA, the electric heat exchange output of which is connected to the electric heat exchange input of the fourth UPPK, the electric heat exchange output of which is connected to the electric heat exchange input of the ninth TGTA, one of the electrical outputs of which is connected to the input of the fourth EI, output which is connected to one of the inputs of the second BTP, the other input of which is connected to another corresponding fastening output of the second BKPU, the corresponding hydraulic inputs and corresponding hydraulic outputs of the first, second, third, fourth, fifth, sixth, seventh, eighth and ninth TGTA are connected to the corresponding hydraulic outputs and corresponding hydraulic inputs of the BGKO, another corresponding hydraulic input of which is the main hydraulic input of the power inverter module, and another hydraulic output of the BGKO is the main hydraulic output of the power inverter module, another corresponding electrical output of the second TGTA is connected to one of the electrical inputs of the third The GITS, the other electrical input of which is connected to another corresponding electrical output of the fourth TGTA, another corresponding electrical output of the sixth TGTA, is connected to one of the electrical inputs of the fourth GSTA, the other electrical input of which is connected to another corresponding electrical output of the eighth TGTA, the fifth GITS with one of the electrical inputs is connected simultaneously to the mentioned electrical output of the third TGTA and the input of the second EI, and with another electrical input the GITS is simultaneously connected to the mentioned output of the third EI and with the electrical input of the seventh TGTA, and another corresponding electrical input of the fifth GITS is also the second power electrical input of the power inverter module, the first BSTR with its electrical and heat exchange inputs is connected to the corresponding electrical and heat exchange outputs of the first TGTA, and the electrical output of the BSTR is connected to one of the electrical inputs of the sixth GITS, the other electrical input of which is connected to the electrical output of the first BSK, the electrical input of which is simultaneously connected to the mentioned electrical output of the third TGTA, the input of the second TGTA, to which the corresponding mentioned electrical input of the fifth GSTA is also connected, the electrical input of the second BSK is simultaneously connected to the mentioned output of the third TGTA, the electrical output of the seventh TGTA, to which the corresponding mentioned electrical input of the fifth GSTA is also connected, and the electrical the output of the second BSK is connected to one of the electrical inputs of the seventh TGTS, the other electrical input of which is connected to the electrical output of the second BSTR, the electrical and heat exchange inputs of which are connected to the corresponding electrical and heat exchange outputs of the ninth TGTA, another electrical input of which is also the third power electrical input of the power inverter module, one of the control and control inputs/outputs of the first LDU is also the control and control output/input of the first LDU and is connected to the control and control input of the first UPPK, and the optical input/output of the first LDU is one of the optical outputs/inputs of the first LDU and the first optical input/output of the power inverter module, and one of the operational power inputs of the first LDU is also the operational power input of the first LDU and the first input of the operational power supply of the power inverter module, the control input/output of the second LDU is also another control output/ input of the first BDU and is connected to the control input/output of the second UPPK, and the optical input/output of the second LDU is another optical output/input of the first BDU and the second optical input/output of the power inverter module, and another input of the operational power supply of the first BDU is also the input of the operational power supply of the second LDU and the second input of the operational power supply of the power inverter module, one of the control and control inputs/outputs of the second LDU is also the control and control output/input of the third LDU and is connected to the corresponding control and control input of the third UPPK, and the optical input/ the output of the third LDU is one of the optical outputs/inputs of the second LDU and the third optical input/output of the power inverter module, and one of the operational power inputs of the second LDU is also the operational power input of the third LDU and the third input of the operational power supply of the power inverter module, control input /the output of the fourth LDU is also the control and control output/input of the second BDU and is connected to the control and control input/output of the fourth UPPK, and the optical input/output of the fourth LDU is another optical output/input of the second BDU and the fourth optical input/output of the power inverter module, and one more input of the operative power supply of the second BDU is also the operative power input of the fourth LDU and the fourth input of the operative power supply of the power inverter module, the other four inputs of the first BDU and the other four inputs of the second BDU are the fastening inputs of the corresponding blocks and are connected with the corresponding eight fastening outputs of the second LSIC, two more corresponding fastening inputs of which are connected to two more corresponding fastening outputs of the first BKPU, and two more corresponding fastening inputs of the second BLSIS are connected to two more corresponding fastening outputs of the second BKPU.

In this case, all connections of the power inverter module can be made in the form of detachable connections, and the power electrical inputs and the power electrical output of the power inverter module can be connected, respectively, to the outputs of a constant voltage source, implemented in the form of DC link capacitors with a midpoint, and to a flexible load tires.

The first, second, third and fourth UPPK can each have two contact pads, one of which is an electric heat exchange input, and the other is an electric heat exchange output of UPPK, and each contact pad can have one or more technological holes for a pin detachable connection of UPPK with the corresponding TGTA.

The first and second BSC may each consist of one capacitor and may have additional electrical insulators, and if each BSC contains two or more capacitors connected in parallel, the first and second BSC may additionally include additional connecting busbars and insulators.

The first and second BKPU can each contain a metal clamping panel, technological and threaded holes for implementing external and internal detachable connections, as well as a fastening panel for installing and securing the power inverter module in electrical equipment cabinets in which it is planned to use the inverter module, with either the first or the second BKPU may contain one or more indicator washers to control the amount of pressing force and the uniformity of its distribution.

The first LSIC may contain two metal racks, as well as two insulators to ensure high-voltage electrical insulation of the metal racks from the conductive elements of the power inverter module, and each metal rack has threads and nuts with washers at the ends for detachable connection of the racks of the first LSIC with the first and second BKPU.

The second LSIC may contain two metal racks and two insulators to ensure high-voltage electrical insulation of the metal racks from the conductive elements of the power inverter module, each metal rack having threads and nuts with washers at the ends for detachable connection of the racks of the first LSIC with the first and second BKPU, and the insulators each of the metal racks can have at least eight dielectric fastening points for detachable connection with the first and second control unit.

The BGKO may contain fastening elements for a detachable connection with the first and second BKPU, input and output hydraulic manifolds, and the input and output hydraulic manifolds of the BGKO may contain ten inlet and ten outlet fittings, while nine inlet and nine outlet fittings are connected to the nine inlet and nine outlet fittings, respectively. nine output dielectric flexible hoses for connection to the corresponding hydraulic outputs and inputs of the first, second, third, fourth, fifth, sixth, seventh, eighth and ninth TGTA, and another inlet and one more outlet fittings of the hydraulic manifolds are, respectively, the main hydraulic inlet and the main hydraulic output of the power inverter module for connection to an external liquid cooling system and circulation of low electrical conductivity refrigerant, while the electrical conductivity of the refrigerant used is determined by the required level of insulation of the power inverter module.

The first and second BTP can each contain a metal panel with one or more pins fixed on it perpendicularly, on each of which disc springs connected in a certain way are installed, the number and method of connection of which depends on the required value of the working deformation and the required amount of pressing force, determined during the design power inverter module.

The first, second, third and fourth EI may contain technological holes for pin detachable connections with the corresponding inputs or outputs of the first and second BTP, TGTA and the fifth GITS, and the overall dimensions of the mentioned EI depend on the required level of electrical insulation and are determined when designing the power inverter module.

The first and second BSTR, as well as the first and second BUTR, can each consist of one or two or more heat exchange resistors, and all heat exchange resistors can have a heat exchange input forming a heat exchange input BSTR or BUTR and technological holes for attaching the heat exchange inputs of BSTR or BUTR to the corresponding TGTA , in this case, each of the mentioned BSTR and BUTR blocks may contain additional insulators, and the resistance value of the heat exchange resistors is determined at the design stage of the power inverter module.

The first, second, third, fourth, fifth, sixth, seventh, eighth and ninth TGV may contain internal passages for flowing a low electrical conductivity refrigerant flow from a hydraulic inlet to a hydraulic outlet of the TGTA, wherein the coolant may be deionized fresh water and the volume the refrigerant flow depends on the magnitude of the total heat losses created at the electrical heat exchange inputs and outputs, as well as the heat exchange outputs of each TGTA and is determined during the design, while the hydraulic inputs and outputs of the TGTA can be made in the form of fittings that are connected to the corresponding outputs and inputs of the BGKO, the mentioned TGTA may contain two contact pads, one of which is either an electric heat exchange or electrical input, and the other is either an electric heat exchange or electrical output of the corresponding TGTA, and each TGTA may have technological and threaded holes for the implementation of external and internal detachable connections and fastenings, additional insulators, as well as one or more elements (pins) for fixing and orienting the position of UPPPK, FPPDK and EI relative to the corresponding TGTA, while the first, fifth and ninth TGTA may contain places with threaded holes for attaching the corresponding heat exchange inputs BSTR and BUTR to the corresponding heat exchangers TGTA outputs, as well as busbar extensions for external connection of the first power electrical input, power electrical output and third power electrical input of the power inverter module, respectively.

The first and second FPDPC can each have a UPPPC form factor; in addition, a UPPPC with a built-in reverse diode can be used as a FPDPC, the characteristics of which are configured to operate exclusively in diode mode, and each FPDPC can have two contact pads, one of which is an electric heat exchange input, and the other is an electric heat exchange output of the corresponding FPDPC, while each contact pad can have one or more technological holes for a pin detachable connection of the UPPPC with the corresponding TGTA.

The first, second, third, fourth, fifth, sixth, and seventh GITS may contain prefabricated elements and packages of metal plates consisting of one or two or more curved metal plates pressed at the ends, the overall dimensions of which are determined during the design, while each of the packages of metal plates of the mentioned GITS may contain an additional layer of high-voltage electrical insulation; in addition, each GITS may contain technological holes for the corresponding detachable connections.

The first and second BDUs may each contain a dielectric panel for placing two LDUs included in the BDU, dielectric elements for fastening the LDU to the dielectric panel, dielectric fastening elements for detachable connections of the BDU with the second LSIC, as well as cable fastening components, the first, second, third and the fourth LDU may have protective varnish coatings and/or protective screens.

The introduced first and second BKPU together with the introduced first and second BSIS make it possible to combine and compress with each other all the TGTA, EI and BTP included in the power inverter module into a single structure, and also make it possible to set and control the value of the installed compression pressing force UPPK and FPDK in the required range, determined by the passport characteristics of UPPK and FPDK. In addition, the first and second BKPU make it possible to fix the power inverter module in the electrical equipment cabinets in which it is planned to install the power inverter module, and the second BSIS also provides the ability to install in the design of the power inverter module the introduced first and second BDU and the first, second, third and fourth contained in them LDU, and the presence of insulation in the first and second LSIC ensures an increase in the level of electrical insulation of the power inverter module.

The introduced first and second BTP provide the ability to stabilize the value of the clamping force established using the BKPU and BSIS for the UPPK, FPDK in a given range, including during temperature changes of the UPPK, FPDK, TGTA and other components, and with temperature changes in the geometry along the axis of the clamping force vector, the first and the second BTP change the dimensions of the disc springs by the amount of the total change in the geometry of the UPPK, FPDK, TGTA and other components, while maintaining the amount of pressing force of the UPPK and FPDK in the required range, determined by the passport characteristics of the UPPK and FPDK.

The first and second BDUs introduced into the power inverter module, each of which contains two optical-electronic LDUs, ensure the reception of input optical signals from external control systems, the conversion of these signals into electrical control signals of the UPPK, control of the electrical parameters of the UPPK and the conversion of electrical parameters into electrical ones control signals, conversion of electrical control signals into optical signals and transmission of output optical signals to external control systems. The presence in the design of the power inverter module of the first and second BDU with optical-electronic and electron-optical signal conversion through four optical-electronic local control drivers located in close proximity to the UPPK, which control the first, second, third and fourth UPPK, ensures minimization of inductive interference and interference in electrical control circuits.

The introduced first and second FPDPC make it possible to create an additional third voltage level by connecting to the power electrical output of a fixed voltage the second power electrical input of the power inverter module, which is equal to half of the full input voltage and together with the first, second, third and fourth FPDPC, the first, second, the third and fourth EI, the first, second, third fourth, fifth, sixth and seventh GITS, united by appropriate connections, make it possible to form in the power inverter module a fundamental circuitry solution for a three-level conversion of direct voltage electricity into alternating voltage, which reduces the coefficient of nonlinear distortion and improves the quality of the output voltage and current during operation of the power inverter module, including as part of autonomous voltage inverters of electricity conversion systems.

The introduced first and second BUTRs make it possible to increase the reliability of the power inverter module when the static characteristics of the UPPPC change during operation by distributing the levels (shelves) of voltage pulses of all UPPK in such a way that in the static mode, as well as with any combinations of turning on and off the UPPK, the maximum levels of the voltage shelves at each closed UPPK not higher than half of the full input voltage applied between the first and third power electrical inputs of the power inverter module. At the same time, the presence of heat exchange inputs of the first and second BUTR allows the resistors of the first and second BUTR to be cooled by connecting the first and second BUTR to the heat exchange outputs of the corresponding TGTA, thereby ensuring long-term operation in continuous mode without overheating, which further increases the reliability of the power inverter module.

The introduced first and second BSTR make it possible to increase the efficiency of the first and second BSTR, which together with the first and second BSTR form universal snubber RC circuits, ensuring increased reliability of the operation of the power inverter module in powerful converters at high switching currents, and the possibility of installing two or more resistors in the BSTR reduces the parasitic inductance of the unit, and the presence of heat exchange inputs of the first and second BSTR allows the resistors of the first and second BSTR to be cooled by connecting the first and second BSTR to the heat exchange outputs of the corresponding TGTA, thereby ensuring long-term operation in continuous mode without overheating, which also increases reliability of the power inverter module.

The introduced first, second, third, fourth, fifth, sixth, seventh, eighth and ninth TGTAs carry out effective heat removal from all UPPK, FPDPC, BSTR and BUTR due to the constant flow of refrigerant with low specific electrical conductivity inside each TGTA, as well as due to the presence corresponding heat exchange and electric heat exchange inputs and outputs to which the corresponding inputs and/or outputs of the mentioned UPPPK, FPPDK, BSTR and BUTR are connected. This ensures the possibility of constant long-term operation of controlled semiconductor devices without overheating. In addition, the mentioned TGTAs provide external and internal electrical connections to the power inverter module.

The introduced first, second, third and fourth EIs provide an increase in the level of electrical insulation of the power inverter module and participate in the formation of a circuit design and design solution for a three-level conversion of DC to AC electricity.

The introduced first, second, third, fourth, fifth, sixth, and seventh GITS participate in the formation of the required electrical connections of the power inverter module for the implementation of a circuit design solution for the three-level conversion of DC to AC electricity, while due to the flexibility of the mentioned GITS the quality of connections is ensured and maintained at vibration effects or thermal changes in geometry, as well as when the distance between the TGTA changes as a result of thermal expansion, while the presence of GITS insulation makes it possible to increase the overall level of insulation of the power inverter module.

The introduced BGKO allows you to connect the power inverter module to an external liquid cooling system of the electrical equipment in which it is planned to use the power inverter module, while the main hydraulic input of the power inverter module and the input manifold contained in the BGKO provide the supply of refrigerant to the hydraulic inputs of the mentioned TGTA, and the output manifold of the power inverter module and the main hydraulic outlet ensures the removal of the refrigerant heated in the TGTA to an external liquid cooling system, which clearly guarantees continuous cooling and removal of generated heat from all UPPK, FPDK, BSTR, BUTR, allows for constant long-term operation of the mentioned devices and units without overheating, ensuring reliable uninterrupted operation of the elements of the power inverter module.

Thus, the differences introduced into the proposed power inverter module make it possible to achieve a technical result.

Brief description of drawings

Fig. 1 represents a block diagram of a three-level power inverter module for electrical complexes and electrical energy conversion systems,

Fig. 2 represents a schematic electrical diagram of the implemented circuit design of a power inverter module according to a three-level electricity conversion circuit.

Fig. 3-11 represent a variant of the designed and implemented design of a three-level power inverter module, which shows views of the module from different sides: the first volumetric view (Fig. 3), top view (Fig. 4), bottom view (Fig. 5), second volumetric view (Fig. 6), right view (Fig. 7), left view (Fig. 8), front view (Fig. 9), rear view (Fig. 10), third volumetric view (Fig. 11).

Implementation of a utility model

According to FIG. 1, the first BKPU 1 is connected with the corresponding two fastening outputs to the corresponding two fastening inputs of the first BSIS 2, the other two corresponding fastening inputs of which are connected to the corresponding two fastening outputs of the second BKPU 3, another corresponding fastening output of which is connected to the corresponding fastening input of BGKO 4, the other the corresponding mounting input of which is connected to another corresponding mounting output of the first BKPU 1, another corresponding mounting output of which is connected to the input of the first BTP 5, the output of which is connected to the input of the first EI 6, the output of which is connected to one of the electrical inputs of the first TGTA 7, the other the electrical input of which is the first power electrical input of the power inverter module, and the electric heat exchange output of the first TGTA 7 is connected to the electric heat exchange input of the first UPPK 8, the electric heat exchange output of which is connected to the electric heat exchange input of the second TGTA 9, the electric heat exchange output of which is connected to the electric heat exchange input of the first FPDK 10, the electric heat exchange output which is connected to the electric heat exchange input of the third TGTA 11, the electrical output of which is connected to the input of the second EI 12, the output of which is connected to the electrical input of the fourth TGTA 13, the electric heat exchange output of which is connected to the electric heat exchange input of the second UPPK 14, and one of the electrical outputs of the fourth TGTA 13 is connected to one of the electrical inputs of the first GITSH 15, the other electrical input of which is connected to the electrical output of the first BUTR 16, the electrical and heat exchange inputs of which are connected to the corresponding electrical and heat exchange outputs of the fifth TGTA 17, another electrical output of which is the power electrical output of the inverter module for connecting the load , and the electric heat exchange input of the fifth TGTA 17 is connected to the electric heat exchange output of the second UPPK 14, and the electric heat exchange output of the fifth TGTA 17 is connected to the electric heat exchange input of the third UPPK 18, another electric and one more heat exchange outputs of the fifth TGTA 17 are connected to the corresponding electrical and heat exchange inputs of the second BUTR 19 , the electrical output of which is connected to the electrical input of the second GTS 20, the other electrical input of which is connected to one of the electrical outputs of the sixth TGTA 21, the other electrical output of which is connected to the input of the third EI 22, the output of which is connected to the electrical input of the seventh TGTA 23, the electric heat exchange output of which connected to the electric heat exchange input of the second FPDPC 24, the electric heat exchange output of which is connected to the electric heat exchange input of the eighth TGTA 25, the electric heat exchange output of which is connected to the electric heat exchange input of the fourth UPPK 26, the electric heat exchange output of which is connected to the electric heat exchange input of the ninth TGTA 27, one of the electrical outputs of which is connected to the input of the fourth EI 28, the output of which is connected to one of the inputs of the second BTP 29, the other input of which is connected to another corresponding mounting output of the second BKPU 3, the corresponding hydraulic inputs and corresponding hydraulic outputs of the first 7, second 9, third 11, fourth 13, fifth 17, the sixth 21, seventh 23, eighth 25 and ninth 27 TGTA are connected to the corresponding hydraulic outputs and corresponding hydraulic inputs of BGKO 4, another corresponding hydraulic input of which is the main hydraulic input of the power inverter module, and another hydraulic output of BGKO 4 is the main hydraulic output of the power inverter inverter module, another corresponding electrical output of the second TGTA 9 is connected to one of the electrical inputs of the third TGTA 30, another electrical input of which is connected to another corresponding electrical output of the fourth TGTA 13, another corresponding electrical output of the sixth TGTA 21 is connected to one of the electrical inputs of the fourth TGTS 31, the other electrical input of which is connected to another corresponding electrical output of the eighth TGTA 25, the fifth GSTS 32 is connected by one of the electrical inputs simultaneously to the mentioned electrical output of the third TGTA 11 and the input of the second EI 12, and the other electrical input of the GSTA 32 is simultaneously connected with the mentioned output of the third EI 22 and with the electrical input of the seventh TGTA 23, and another corresponding electrical input of the fifth TGTS 32 is also the second power electrical input of the power inverter module, the first BSTR 33 with its electrical and heat exchange inputs is connected to the corresponding electrical and heat exchange outputs of the first TGTA 7, and the electrical output of BSTR 33 is connected to one of the electrical inputs of the sixth GTS 34, the other electrical input of which is connected to the electrical output of the first BSK 35, the electrical input of which is simultaneously connected to the mentioned electrical output of the third TGTA 11, the input of the second EI 12 to which is also connected the corresponding mentioned electrical input of the fifth GTS 32, the electrical input of the second BSK 36 is simultaneously connected to the mentioned output of the third EI 22, the electrical output of the seventh TGTA 23, to which the corresponding mentioned electrical input of the fifth GTS 32 is also connected, and the electrical output of the second BSK 36 is connected to one of electrical inputs of the seventh GITS 37, the other electrical input of which is connected to the electrical output of the second BSTR 38, the electrical and heat exchange inputs of which are connected to the corresponding electrical and heat exchange outputs of the ninth TGTA 27, another electrical input of which is also the third power electrical input of the power inverter module, one of the control and control inputs/outputs of the first LDU 39 is also the control and control output/input of the first LDU 40 and is connected to the control and control input of the first UPPK 8, and the optical input/output of the first LDU 40 is one of the optical outputs/inputs of the first LDU 39 and the first optical input/output of the power inverter module, and one of the operational power inputs of the first LDU 39 is also the operational power input of the first LDU 40 and the first input of the operational power supply of the power inverter module, the control input/output of the second LDU 41 is also another control - the control output/input of the first BDU 39 and is connected to the control input/output of the second UPPK 14, and the optical input/output of the second LDU 41 is another optical output/input of the first BDU 39 and the second optical input/output of the power inverter module, and one more input of the operative power supply of the first BDU 39 is also the operative power input of the second LDU 41 and the second input of the operative power supply of the power inverter module, one of the control and control inputs/outputs of the second BDU 42 is also the control and control output/input of the third LDU 43 and is connected to corresponding control input of the third UPPK 18, and the optical input/output of the third LDU 43 is one of the optical outputs/inputs of the second BDU 42 and the third optical input/output of the power inverter module, and one of the operational power inputs of the second BDU 42 is also an operational input power supply of the third LDU 43 and the third input of the operational power supply of the power inverter module, the control and control input/output of the fourth LDU 44 is also the control and control output/input of the second BDU 42 and is connected to the control and control input/output of the fourth UPPK 26, and the optical input/ the output of the fourth LDU 44 is another optical output/input of the second LDU 42 and the fourth optical input/output of the power inverter module, and another operational power input of the second LDU 42 is also the operational power input of the fourth LDU 41 and the fourth input of the operational power supply of the power inverter module, the other four inputs of the first BDU 39 and the other four inputs of the second BDU 42 are fastening inputs of the corresponding blocks and are connected to the corresponding eight fastening outputs of the second BSIS 45, two more corresponding fastening inputs of which are connected to two more corresponding fastening outputs of the first BKPU 1, and two more the corresponding mounting inputs of the second BSIS 45 are connected to two more corresponding mounting outputs of the second BKPU 3.

The power inverter module for electrical complexes and electrical energy conversion systems operates as follows.

Before starting work, when the power inverter module is assembled and compressed into a single structure, for example, into the one shown in FIG. 3, the compression force of the power inverter module is monitored using calibration washers contained in either the first 1 or the second 3 BKPU, and with the help of the first 2 and second 45 BSIS, the required amount of clamping force is adjusted. If necessary, the power inverter module is installed in the electrical cabinet using fastening panels, which are contained in both the first 1 and the second 3 BKPU. After this, the first, second and third power electrical inputs of the power inverter module are connected via flexible buses to the outputs of the DC voltage source and/or the capacitors of the DC link with a midpoint, and the power electrical output is connected to one of the load phases of the power inverter module. Then the main hydraulic input and main hydraulic output of the power inverter module are connected to the external liquid cooling system. Next, cables of fiber-optic communication lines (FOCL) are connected to the first, second, third and fourth optical inputs/outputs of the power inverter module, and output cables of low-voltage DC external voltage sources are connected to the first, second, third and fourth inputs of the operational power supply of the power inverter module. control systems. After this, refrigerant with the required parameters is supplied from the hydraulic output of the external liquid cooling system to the hydraulic input of the power inverter module. Deionized fresh water with low electrical conductivity can be used as a refrigerant. In this case, the refrigerant begins to circulate between the main hydraulic input and the main hydraulic output of the power inverter module, passing through the input of the BGKO 4 input manifold, the hydraulic outputs of the BGKO 4 input manifold, the hydraulic inputs of the first 7, second 9, third 11, fourth 13, fifth 17, sixth 21, seventh 23, eighth 25 and ninth 27 TGTA, where it flows through internal channels and enters the corresponding hydraulic outputs of each of the nine TGTA, as well as to the hydraulic inputs of the output manifold BGKO 4, the main hydraulic output of the power inverter module and is then supplied to the hydraulic input external liquid cooling system to cool the heated refrigerant, and supply the cooled refrigerant again to the main hydraulic inlet of the power inverter module. After this, from the external control system, the operational power supply voltage of the power inverter module is supplied to the operational power supply inputs, which is supplied to the operational power inputs of the first 39 and second 42 BDU and, accordingly, the operational power inputs of the first 40, second 41, third 43 and fourth 44 LDU, after which each of the four LDUs diagnoses the corresponding UPPK and produces either an output optical signal that all four UPPK are ready for operation, or an output optical alarm signal if there is a malfunction of the UPPK. When the output optical signals of readiness of all four UPPPCs appear, a constant voltage is supplied to the power electrical inputs of the power inverter module from a constant voltage source or a direct current link with a midpoint, after which, according to the algorithm of three-level electricity conversion specified by the external control system, the optical inputs/outputs of the power inverter The module receives input optical signals of three-level pulse width modulation (PWM) with the required modulation coefficient. These three-level PWM signals in the first 40, second 41, third 43 and fourth 44 LDUs are converted into electrical signals and supplied to the control inputs/outputs of the corresponding UPPK. In this case, the introduced first 10 and second 24 FPDPC (see Fig. 2) due to electrical connections with the second power electrical input ensure the operation of the power inverter module according to a three-level circuit for converting direct voltage electricity into alternating voltage. The switching of each USPPK occurs in such a way that at each moment of time each USPPK is either in an open or closed state, and thanks to the first 16 and second 19 BUTR, for any combination of switching on the USPPK, the voltage pulse shelf levels on the semiconductor devices of the USPPK and FPDPC are not exceed half of the total input voltage applied between the first and third power electrical inputs of the power inverter module, and thanks to the operation of the first 35 and second 36 BSK together with the first 33 and second 38 BSTR, forming universal RC snubber circuits, the maximum instantaneous voltage values (overvoltages) on UPPPC and FPDPC do not exceed the permissible values for UPPPC and FPDPC, determined by the voltage class of the semiconductor devices of the clamping structure. In this case, an alternating phase PWM voltage is generated at the power electrical output of the power inverter module, which is supplied to one of the load phases. During operation, each LDU always analyzes the parameters of the corresponding UPPK in near real time mode and produces an output optical signal about the state of the UPPK. In addition, the first 40, second 41, third 43 and fourth 44 LDUs perform the functions of protecting the power inverter module, control the instantaneous values of currents and voltages of the UPPK, and when the specified threshold values are exceeded, they issue alarm signals, after which they turn off the control and transfer each UPPK to closed state. With a three-phase load, three power inverter modules are used as part of a three-phase autonomous voltage inverter, and the envelopes of the output phase voltages of the power inverter modules are shifted relative to each other by 120 electrical degrees, while at the output of the three-phase autonomous inverter three linear three-level variable PWM voltages are formed with the levels of each positive half cycle of line voltage: zero, half input and full input voltage and with the levels of each negative half cycle of line voltage: zero, minus half input and minus full input voltage of the power inverter module. Such a generated three-level three-phase alternating voltage is supplied to a three-phase load, thereby reducing the coefficient of nonlinear distortion of current and voltage and improving electromagnetic compatibility compared to the two-level conversion of electricity in the prototype. The close location of the first 39 and second 42 BDUs from the UPPK, as well as the presence in the first 39 and second 42 BDUs of optical-electronic signal conversion makes it possible to minimize inductive interference and interference in the electrical control circuits of the UPPK in the process of converting electrical energy, including as part of a three-phase autonomous inverter voltage. During the operation of the power inverter module, semiconductor and resistive components such as UPPK, FPDPC, BSTR, BUTR are heated and release thermal power, which, with the help of the corresponding electric heat exchange and heat exchange inputs and outputs of the TGTA, is discharged into the refrigerant flowing through the channels inside each TGTA, as a result of which all UPPPK, FPPDK, BSTR and BUTR are constantly cooled. At the same time, due to constant cooling, reliability increases and long-term operation of UPPPK, FPPDK, BSTR, BUTR is ensured without overheating within the operating temperature range, in addition, the reliability of the snubber circuits increases, including in powerful converters at high switching currents. It should be noted that, in accordance with the basic law of thermal expansion, when the temperature of the elements of the power inverter module changes during operation, the geometric dimensions of these elements also change. As the temperature increases, the elements increase their linear dimensions in the projection of the clamping force vector and try to increase the clamping force of the module, and when the temperature decreases, the elements reduce their linear dimensions in the projection of the clamping force vector and try to reduce the clamping force of the module. To stabilize the pressing force when the temperature increases, the first 5 and second 29 BTP compress the disc springs by an amount equal to the total increase in the geometric dimensions of the module elements along the axis of the pressing force vector, and when the temperature decreases, the first 5 and second 29 BTP decompress the disc springs by an amount equal to the total decrease in the geometric dimensions of the module elements along the axis of the clamping force vector, while the magnitude of the compression force of the power inverter module due to the mechanical properties of the first 5 and second 29 BTP remains in the range acceptable for UPPPC, FPDPC and other elements of the module, which is controlled either in the first 1 or in the second 3 BKPU using calibration washers contained in one of the BKPU. In addition, with a temperature change in the geometric dimensions of the module elements in the projection of the clamping force vector, in the projection of the clamping force vector, the distance between the elements of the inverter module associated with the first 15, second 20, third 30, fourth 31, fifth 32, sixth 34 and seventh also changes 37 GITS. Due to the flexibility of the GITS, an increase in the length of the GITS in the projection of the clamping force vector by the required value with increasing temperature is ensured, and a decrease in the length in the projection of the clamping force vector by the required value as the temperature decreases, resulting in the quality of the detachable connections of the GITS with the corresponding TGTA, BSTR , BUTR always remains high during temperature changes in the geometric dimensions of the module elements, as well as under possible vibration influences.

Thus, the proposed power inverter module for electrical complexes and electrical energy conversion systems allows for three-level conversion of DC to AC electricity, improves the efficiency and reliability of snubber circuits in powerful converters at high switching currents, and makes it possible to install semiconductor device control drivers in the design power inverter module, minimize inductive interference and interference in electrical control circuits, the inverter module equalizes and distributes the voltage of controlled semiconductor elements to increase reliability, guarantees constant long-term operation of controlled semiconductor devices and other module elements without overheating, stabilizes the amount of clamping force of semiconductor devices of the clamping design in the required range, including during temperature changes in the geometry of semiconductor devices UPPK and FPDK, as well as coolers and other module components.

Let's consider an example of the design of the proposed power inverter module (see Fig. 3-11).

The first 1 and second 3 BKPU, depending on the required clamping force and the mass of the power inverter module, can be made of a metal clamp panel and a metal fastening panel made of steel or titanium alloys with galvanic coating, and either the first 1 or the second 3 BKPU can contain calibration washers, which can also be made of steel or titanium alloys.

The first 2 and second 45 BSIS can each be made of two cylindrical metal racks made of steel or titanium alloys with threaded ends, fastening nuts with washers made of steel or titanium alloys with galvanic coating and two cylindrical insulators made of STEF fiberglass installed on the outer surface of the racks along the entire length between the threads, while the insulator of the second BSIS 45 additionally has eight dielectric fastening points made of fiberglass or polyamide for attaching the first BDU 39 and the second BDU 42.

BGKO 4 can be made of two metal cylindrical hydraulic manifolds or plastic (fluoroplastic) cylindrical hydraulic manifolds with nine built-in metal fittings each, eighteen flexible electrically non-conductive hoses, for example from Parker, electrical insulating fixing elements and fastenings made of fiberglass or polyamide for fixing the manifolds and fastening to the first BGKO 1 and the second BGKO 3.

The first BTP 5 and the second BTP 29 can be made of a metal panel, metal studs, and disc springs, while the metal panel and studs, depending on the required characteristics, can be made from steel or titanium alloys with galvanic coating, and disc springs are made from spring - spring steel according to GOST 3057-90.

The first 6, second 12, third 22 and fourth 28 EI can be made of fiberglass or durostone.

The first 7, second 9, third 11, fourth 13, fifth 17, sixth 21, seventh 23, eighth 25, and ninth 27 TGTA can be manufactured according to the required drawings from aluminum alloy.

Depending on the voltage class, power and current load, semiconductor IGBT devices of a clamping design (press pack IGBT) with a built-in reverse diode, for example, TG2000SW45ZC-P200, TG3000SW45ZC-P200 can be used as the first 8, second 14, third 18 and fourth 26 UPPK CRRC company, or PIMA-RC45CA-2000N PROTON-ELECTROTEX JSC.

The first 10 and second 24 FPDPC can be made in a single form factor with the UPPPC with contact pads of the same shape and size and, depending on the voltage class, power and current load, semiconductor IGBT devices of the clamping design TG2000SW45ZC configured to operate in diode mode can be used -P200, TG3000SW45ZC-P200 with a built-in reverse diode from CRRC, or IGBT clamping design with a built-in reverse diode PIMA-RC45CA-2000N JSC "PROTON-ELECTROTEX".

The first 15, second 20, third 30, fourth 31, fifth 32, sixth 34 and seventh 37 GITS can be made of copper plates with an outer layer of high-voltage electrical insulation.

The first 16 and second 19 BUTR, as well as the first 33 and second 38 BUTR can be made, depending on the required power, from resistors with heat exchange inputs, and additional insulators made of polyamide or fiberglass.

The first 35 and second 36 BSK can consist of snubber capacitors from ZEZ Silco, SMJ, CRE or BM Capacitors.

The first 39 and second 42 BDUs can each contain an electrical insulating panel made of polyamide or fiberglass with mounting holes and plastic fasteners, and the first 40, second 41, third 43 and fourth 44 LDUs installed on these panels, which can be used as drivers of powerful high-voltage IGBT transistors DR1350P -BV-45-01 Electrum AV JSC.

List of reference designations

1 and 3, first and second clamping force control units (first and second BKPU);

2 and 45 the first and second blocks of tightening insulated racks (first and second LSIS);

4 block of hydraulic cooling manifolds (BGKO);

5 and 29 first and second blocks of disc springs (first and second BTP);

6, 12, 22 and 28 first, second, third and fourth electrical insulators (first, second, third and fourth EI); 7, 9, 11, 13, 17, 21, 23, 25 and 27 - first, second, third, fourth, fifth, sixth, seventh, eighth and ninth conductive hydraulic heat exchangers (first, second, third, fourth, fifth, sixth, seventh, eighth and ninth TGTA);

8, 14, 18 and 26 first, second, third and fourth controlled semiconductor devices of the clamping structure (first, second, third and fourth UPPPK);

10 and 24 first and second clamping semiconductor diodes of the clamping structure (first and second FPDPC); 15, 20, 30, 31, 32, 34 and 37 - first, second, third, fourth, fifth, sixth and seventh flexible insulated conductive busbars (first, second, third, fourth, fifth, sixth and seventh GITS);

16 and 19 first and second blocks of equalizing heat exchange resistors (first and second BUTR);

33 and 38 first and second blocks of snubber heat exchange resistors (first and second BSTR);

35 and 36 first and second blocks of snubber capacitors (first and second BSK);

39 and 42 first and second control driver blocks (first and second ODU);

40, 41, 43 and 44 first, second, third and fourth local control drivers (first, second, third and fourth LDU).

Claims (15)

1. Power three-level inverter module for electrical complexes and electrical energy conversion systems, made with the ability to connect power electrical inputs to the outputs of a constant voltage source, implemented in the form of DC link capacitors with a midpoint, and containing the first, second, third and fourth controlled semiconductor devices of a clamping structure (UPPPK), the first and second blocks of snubber capacitors (first and second BSK), each of which contains two or more parallel-connected capacitors, characterized in that it additionally contains the first and second blocks of control of the clamping force (first and second BKPU) , the first and second clamping semiconductor diodes of the clamping structure (the first and second FPDPC), the first, second, third and fourth electrical insulators (the first, second, third and fourth EI), the first and second blocks of snubber heat exchange resistors (the first and second BSTR), the first and second blocks of equalizing heat exchange resistors (the first and second BUTR), the first, second, third, fourth, fifth, sixth and seventh flexible insulated conductive busbars (the first, second, third, fourth, fifth, sixth and seventh GITS), the first and the second blocks of control drivers (the first and second BDU), each of which contains two local control drivers (LDU), the first and second blocks of disc springs (the first and second BCP), the first and second blocks of tightening insulated racks (the first and second LSIS) , each of which contains two insulated tightening racks, the first, second, third, fourth, fifth, sixth, seventh, eighth and ninth conductive hydraulic heat exchangers (first, second, third, fourth, fifth, sixth, seventh, eighth and ninth TGTA), a block of hydraulic cooling manifolds (BGKO), containing input and output cooling manifolds, with the corresponding two fastening outputs of the first BKPU connected to the corresponding two fastening inputs of the first LSIC, the other two corresponding fastening inputs of which are connected to the corresponding two fastening outputs of the second BKPU, another corresponding fastening output of which is connected to the corresponding fastening input of the BGKO, another corresponding fastening input of which is connected to another corresponding fastening output of the first BKPU, another corresponding fastening output of which is connected to the input of the first BTP, the output of which is connected to the input of the first EI, the output of which connected to one of the electrical inputs of the first TGTA, the other electrical input of which is the first power electrical input of the power inverter module, and the electric heat exchange output of the first TGTA is connected to the electric heat exchange input of the first UPPK, the electric heat exchange output of which is connected to the electric heat exchange input of the second TGTA, the electric heat exchange output of which is connected to the electric heat exchange the input of the first FPDPC, the electric heat exchange output of which is connected to the electric heat exchange input of the third TGTA, the electrical output of which is connected to the input of the second EI, the output of which is connected to the electrical input of the fourth TGTA, the electric heat exchange output of which is connected to the electric heat exchange input of the second UPPK, and one of the electrical outputs of the fourth TGTA is connected with one of the electrical inputs of the first TGTS, the other electrical input of which is connected to the electrical output of the first BUTR, the electrical and heat exchange inputs of which are connected to the corresponding electrical and heat exchange outputs of the fifth TGTA, another electrical output of which is the power electrical output of the inverter module for connecting the load, and the electric heat exchange input of the fifth TGTA is connected to the electric heat exchange output of the second UPPK, and the electric heat exchange output of the fifth TGTA is connected to the electric heat exchange input of the third UPPK, another electrical and another heat exchange outputs of the fifth TGTA are connected to the corresponding electrical and heat exchange inputs of the second BUTR, the electrical output of which is connected to the electrical input the second GITS, the other electrical input of which is connected to one of the electrical outputs of the sixth TGTA, the other electrical output of which is connected to the input of the third EI, the output of which is connected to the electrical input of the seventh TGTA, the electric heat exchange output of which is connected to the electric heat exchange input of the second FPDK, the electric heat exchange output of which is connected to the electric heat exchange input of the eighth TGTA, the electric heat exchange output of which is connected to the electric heat exchange input of the fourth UPPK, the electric heat exchange output of which is connected to the electric heat exchange input of the ninth TGTA, one of the electrical outputs of which is connected to the input of the fourth EI, the output of which is connected to one of the inputs of the second BTP, the other input of which is connected with another corresponding mounting output of the second BKPU, and the corresponding hydraulic inputs and corresponding hydraulic outputs of the first, second, third, fourth, fifth, sixth, seventh, eighth and ninth TGTA are connected to the corresponding hydraulic outputs and corresponding hydraulic inputs of the BGKO, another corresponding hydraulic the input of which is the main hydraulic input of the power inverter module, and another hydraulic output of the BGKO is the main hydraulic output of the power inverter module, another corresponding electrical output of the second TGTA is connected to one of the electrical inputs of the third GITS, another electrical input of which is connected to another corresponding electrical output of the fourth TGTA, another corresponding electrical output of the sixth TGTA is connected to one of the electrical inputs of the fourth TGTA, another electrical input of which is connected to another corresponding electrical output of the eighth TGTA, the fifth GSTA is connected by one of the electrical inputs simultaneously to the mentioned electrical output of the third TGTA and the input of the second EI, with another electrical input of the GITS simultaneously connected to the mentioned output of the third EI and with the electrical input of the seventh TGTA, and another corresponding electrical input of the fifth GITS is also the second power electrical input of the power inverter module, and the first BSTR with its electrical and heat exchange inputs is connected to corresponding to the electrical and heat exchange outputs of the first TGTA, and the electrical output of the BSTR is connected to one of the electrical inputs of the sixth GSTA, the other electrical input of which is connected to the electrical output of the first BSK, the electrical input of which is simultaneously connected to the mentioned electrical output of the third TGTA and the input of the second EI, to which the corresponding mentioned electrical input of the fifth GITS is also connected, the electrical input of the second BSK is simultaneously connected to the mentioned output of the third EI and the electrical output of the seventh TGTA, to which the corresponding mentioned electrical input of the fifth GSTS is also connected, and the electrical output of the second BSK is connected to one of the electrical inputs of the seventh GSTS , the other electrical input of which is connected to the electrical output of the second BSTR, the electrical and heat exchange inputs of which are connected to the corresponding electrical and heat exchange outputs of the ninth TGTA, another electrical input of which is also the third power electrical input of the power inverter module, and one of the control inputs/ outputs of the first BDU is also the control and control output/input of the first LDU and is connected to the control and control input of the first UPPK, and the optical input/output of the first LDU is one of the optical outputs/inputs of the first BDU and the first optical input/output of the power inverter module, and one of the operational power inputs of the first LDU is also the operative power input of the first LDU and the first input of the operational power supply of the power inverter module, the control and control input/output of the second LDU is also another control and control output/input of the first LDU and is connected to the control and control input / output of the second UPPK, and the optical input/output of the second LDU is another optical output/input of the first LDU and the second optical input/output of the power inverter module, and another operative power input of the first LDU is also the operative power input of the second LDU and the second operative input supply of the power inverter module, one of the control and control inputs/outputs of the second LDU is also the control and control output/input of the third LDU and is connected to the corresponding control and control input of the third UPPK, and the optical input/output of the third LDU is one of the optical outputs/inputs the second BDU and the third optical input/output of the power inverter module, wherein one of the operational power inputs of the second BDU is also the operational power input of the third LDU and the third input of the operational power supply of the power inverter module, the control input/output of the fourth LDU is also the control output /input of the second BDU and is connected to the control input/output of the fourth UPPK, and the optical input/output of the fourth LDU is another optical output/input of the second BDU and the fourth optical input/output of the power inverter module, and another input of the operational power supply of the second BDU is also the operative power input of the fourth LDU and the fourth operative power input of the power inverter module, the other four inputs of the first BDU and the other four inputs of the second BDU are the fastening inputs of the corresponding blocks and are connected to the corresponding eight fastening outputs of the second LSIC, two other corresponding fastening inputs of which are connected with two more corresponding fastening outputs of the first BKPU, and two more corresponding fastening inputs of the second BSIS are connected to two more corresponding fastening outputs of the second BKPU. 2. Power inverter module according to claim 1, characterized in that all connections of the power inverter module are made in the form of detachable connections, and the power electrical inputs and power electrical output of the power inverter module are designed to be connected, respectively, to the outputs of a direct voltage source implemented in the form of capacitors DC link with a midpoint, and to the load with flexible busbars. 3. Power inverter module according to claim 1, characterized in that the first, second, third and fourth UPPK each have two contact pads, one of which is an electric heat exchange input, and the other is an electric heat exchange output UPPK, and each contact pad has one or more technological hole for a pin detachable connection of the UPPK with the corresponding TGTA. 4. Power inverter module according to claim 1, characterized in that the first and second BSC each consist of one capacitor and have additional electrical insulators, and if each BSC contains two or more capacitors connected in parallel, the first and second BSC additionally have its composition includes additional connecting bars and insulators. 5. Power inverter module according to claim 1, characterized in that the first and second BKPU each contain a metal clamping panel, technological and threaded holes for making external and internal detachable connections, as well as a fastening panel for installing and securing the power inverter module in electrical equipment cabinets , while either the first or the second BKPU contains one or more indicator washers to control the amount of pressing force and the uniformity of its distribution. 6. Power inverter module according to claim 1, characterized in that the first LSIC contains two metal racks, as well as two insulators to ensure high-voltage electrical insulation of the metal racks from the conductive elements of the power inverter module, and each metal rack has threads and nuts at the ends washers for detachable connection of the racks of the first LSIC with the first and second BKPU. 7. Power inverter module according to claim 1, characterized in that the second LSIC contains two metal racks and two insulators to ensure high-voltage electrical insulation of the metal racks from the conductive elements of the power inverter module, and each metal rack has threads at the ends and nuts with washers for detachable connection of the racks of the first BSIS with the first and second BCU, and the insulators of each of the metal racks have at least eight dielectric attachment points for detachable connection with the first and second BDU. 8. Power inverter module according to claim 1, characterized in that the BGKO contains fastening elements for a detachable connection with the first and second BKPU, input and output hydraulic manifolds, and the input and output hydraulic manifolds BGKO contain ten inlet and ten outlet fittings, while nine input and nine output fittings are respectively connected to nine input and nine output dielectric flexible hoses for connection to the corresponding hydraulic outputs and inputs of the first, second, third, fourth, fifth, sixth, seventh, eighth and ninth TGTA, and another input and another one outlet fitting of the hydraulic manifolds is respectively the main hydraulic input and the main hydraulic output of the power inverter module for connection to an external liquid cooling system and circulation of low electrical conductivity refrigerant, while the electrical conductivity of the refrigerant used is determined by the required insulation level of the power inverter module. 9. Power inverter module according to claim 1, characterized in that the first and second BTP each contain a metal panel with one or more pins fixed to it perpendicularly, on each of which disc springs connected in a certain way are installed. 10. Power inverter module according to claim 1, characterized in that the first, second, third and fourth EI contain technological holes for pin detachable connections with the corresponding inputs or outputs of the first and second BTP, TGTA and the fifth GITS. 11. Power inverter module according to claim 1, characterized in that the first and second BUTR, as well as the first and second BUTR each consists of one or two or more heat exchange resistors, and all heat exchange resistors have a heat exchange input, forming a heat exchange input BUTR or BUTR and technological holes for attaching the heat exchange inputs of the BSTR or BUTR to the corresponding TGTA, with each of the mentioned blocks of BSTR and BUTR containing additional insulators. 12. Power inverter module according to claim 1, characterized in that the first, second, third, fourth, fifth, sixth, seventh, eighth and ninth TGTA contain internal channels for the flow of refrigerant with low electrical conductivity from the hydraulic inlet to the hydraulic output of the TGTA , wherein the refrigerant is deionized fresh water, and the volume of refrigerant flow depends on the magnitude of the total heat losses created at the electric heat exchange inputs and outputs, as well as the heat exchange outputs of each TGTA, while the hydraulic inputs and outputs of the TGTA are made in the form of fittings that are connected to the corresponding outputs and inputs of the BGKO, the mentioned TGTA contain two contact pads, one of which is either an electric heat exchange or electrical input, and the other is either an electric heat exchange or electrical output of the corresponding TGTA, and each TGTA has technological and threaded holes for implementing external and internal detachable connections and fastenings, additional insulators, as well as one or more elements (pins) for fixing and orienting the position of the UPPK, FPDK and EI relative to the corresponding TGTA, while the first, fifth and ninth TGTA contain places with threaded holes for attaching the corresponding heat exchange inlets BSTR and BUTR to corresponding heat exchange outputs of the TGTA, as well as busbar extensions for external connection of the first power electrical input, power electrical output and third power electrical input of the power inverter module, respectively. 13. Power inverter module according to claim 1, characterized in that the first and second FPDPC each have a UPPPC form factor, in addition, the specified FPDPC are UPPPC with a built-in reverse diode, the characteristics of which are configured to operate exclusively in diode mode, and each FPDPC has two contact pads, one of which is the electric heat exchange input, and the other is the electric heat exchange output of the corresponding FPDPC, and each contact pad has one or more technological holes for a pin detachable connection of the UPPPC with the corresponding TGTA. 14. Power inverter module according to claim 1, characterized in that the first, second, third, fourth, fifth, sixth, and seventh GITS contain prefabricated elements and packages of metal plates consisting of one or two or more pressed at the ends and curved metal plates, and each of the packages of metal plates of the mentioned GITSH contains an additional layer of high-voltage electrical insulation, in addition, each GITSH contains technological holes for the corresponding detachable connections. 15. Power inverter module according to claim 1, characterized in that the first and second BDU each contain a dielectric panel for placing two LDUs included in the BDU, dielectric elements for fastening the LDU to the dielectric panel, dielectric fastening elements for detachable connections of the BDU with the second LSIS , as well as cable fastening components, wherein the first, second, third and fourth LDUs have protective varnish coatings and/or protective screens.

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