UA124032C2 - Four-quadrant power module - Google Patents

Abstract

Provided is a four-quadrant power module, comprising: a water-cooled substrate (1), an IGBT assembly (2), a composite busbar (3), a driver circuit hoard (4), a low-voltage connector (5), and a handle assembly (15); the surface of one side of the water-cooled substrate (I) is provided with the IGBT assembly (2), and the outer side of the IGBT assembly (2) is provided with the composite busbar (3); the other side of the water-cooled substrate (1) is provided with the driver circuit board (4), the low-voltage connector (5), and the handle assembly (15); the IGBT assembly (2) is electrically connected to the composite busbar (3) and the driver circuit board (4); the driver circuit board (4) is electrically connected to the low-voltage connector (5); the side face of the composite busbar (3) is provided with a connection terminal (II); the low-voltage connector (5) is used for transmitting a power-supply drive signal, a drive control signal, and a power-unit status feedback signal; the driver circuit board (4) is used for processing the drive control signal to generate a signal to control the operation of the IGBT assembly (2). In the four-quadran t power module provided by the present technical solution, controllable rectification is achieved and stability in operation of the power module is increased.

Description

FIELD OF TECHNOLOGY TO WHICH THE INVENTION BELONGS

This invention belongs to the field of electrical engineering and, in particular, to a four-quadrant power module.

TECHNICAL LEVEL

In recent years, with the development of electronic technology and the technology of railcar coupling, the traction power converter of the electric locomotive with an alternating current electric drive is developing in the direction of high power, high degree of integration and low weight. The power module, as the basic component of the entire power converter, is also developing in the direction of high frequency, miniaturization and high reliability. In those cases, the four-quadrant power module is one type of power module and is designed to convert single-phase alternating current into direct current, thereby supplying power to the following inverter circuit.

At this time, the four-quadrant power module performs the rectification function by using the main circuit formed by a thyristor or diode. However, the characteristics of the thyristor or diode make the four-quadrant power module unable to achieve controlled rectification. The four-quadrant power module has unstable operation due to uncontrolled rectification.

ESSENCE OF THE INVENTION

The present invention provides a four-quadrant power module that performs controlled rectification and improves the stability of the power module.

The four-quadrant power module according to the claimed invention includes a substrate with water cooling, an IZVT assembly (BTIZ), a common busbar, an excitation circuit board, a low-voltage connector and a handle assembly; the ISVT assembly is located on the surface of one side of the substrate with water cooling, the busbar assembly is located on the outside of the ISVT assembly; the excitation circuit board, low-voltage connector and handle assembly are located on the other side of the water-cooled substrate; the first water connection, the second water connection and the control pin are located on the side surface of the rear part of the water-cooled substrate; installation holes are located, respectively, in the upper part and lower part of the substrate with water cooling; the installation position of the four-quadrant power module is fixed

With the insertion of fastening elements in the installation holes; the ISVT assembly is electrically connected, respectively, to the collective busbar and the excitation circuit board; the board of the excitation circuit is electrically connected to the low-voltage connector; the connecting terminals electrically connected to the IZVT assembly are located on the side surface of the busbar assembly near the front of the water-cooled substrate; the connecting terminals include a high-voltage DC terminal and an AC terminal for rectification; the low-voltage connector is made with the ability to transmit an excitation power signal, an excitation control signal and a feedback signal on the state of the power plant; the excitation circuit board is made with the ability to process the excitation control signal to form a signal to control the operation of the ISVT assembly.

This invention provides a four-quadrant power module, which includes a substrate with water cooling, an IOT assembly, a busbar assembly, an excitation circuit board, a low-voltage connector and a handle assembly. With respect to the four-quadrant power module according to the claimed invention, the main circuit of the four-quadrant power module takes over the busbar for connection, the controlled rectification is carried out by the assembly

ISVT, and the stability and reliability of the operation of the four-quadrant power module are thus improved.

BRIEF DESCRIPTION DRAWING

In order to more clearly describe the technical solutions in the embodiments of the present invention or the prior art, the following briefly presents the accompanying drawings necessary to describe the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can, however, obtain other drawings from these accompanying drawings without creative effort.

Fig. 1 - the basic structural diagram of the four-quadrant power module in the AA' direction according to variant 1 of the implementation of this invention;

Fig. 2 - the basic structural diagram of the four-quadrant power module in the AGA direction according to variant 1 of the implementation of this invention;

Fig. C - the basic structural diagram in the disassembled form of the four-quadrant power 60 module according to variant 1 of the implementation of this invention;

Fig. 4 - the basic layout diagram of the ISVT in the ISVT assembly according to variant 1 of the implementation of this invention;

Fig. 5 is a schematic diagram of the main circuit according to variant 1 of the implementation of this invention.

Description of reference items: 1: Substrate with water cooling; 2: Collection of IOV; 3: Assembled busbar 4; Excitation circuit board; 5: Low-voltage disconnection; 6: IZVT; 7: Installation hole; 8: First connection for water; 9: Second connection for water; 10: Control pin; 11: Connecting terminal; 12: Protective bracket; 13: Insulating element; 14: Plate for layout protection; 15: Node of handles; 16: First handle; 17: Second handle; 18: Handle assembly cover.

DETAILED DESCRIPTION OF IMPLEMENTATION OPTIONS

In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following clearly and comprehensively describes the technical solutions in the embodiments of the present invention with reference to the attached drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments, rather than all embodiments of the present invention. All other implementation options obtained by ordinary specialists in this field of technology on the basis of implementation options of this invention without creative efforts will fall under the scope of legal protection of this invention.

Fig. 1 - the basic structural diagram of the four-quadrant power module in the AA' direction according to variant 1 of the implementation of this invention. Fig. 2 - the basic structural diagram of the four-quadrant power module in the direction A A according to variant 1 of the implementation of this invention. FiM.Z - the basic structural diagram in the disassembled form of the four-quadrant power module according to variant 1 of the implementation of this invention. As shown in Fig. 1 to 3, the four-quadrant power module provided in this embodiment may include a water-cooled substrate 1, an assembly of 2 bipolar

From transistors with an isolated gate (SVT as an abbreviation), busbar Z and circuit board 4, low-voltage connector 5 and assembly 15 handles.

The ISVT assembly 2 is located on the surface of one side of the substrate 1 with water cooling, the common busbar C is located on the outer side of the ISVT assembly 2. Board 4 of the excitation circuit, low-voltage connector 5 and node 15 of the handles are located on the other side of the substrate 1 with water cooling. The first connection for water 8, the second connection for water 9 and the control pin 10 are located on the side surface of the rear part of the substrate 1 with water cooling. Mounting holes 7 are located, respectively, in the upper part and lower part of the substrate 1 with water cooling. The installation position of the four-quadrant power module is fixed by inserting the fastening elements into the installation holes 7.

The ISVT assembly 2 is electrically connected, respectively, to the assembly busbar C and the circuit board 4 of the excitation circuit. Board 4 of the excitation circuit is electrically connected to the low-voltage connector 5.

The connecting terminals 11, electrically connected to the ISVT assembly 2, are located on the side surface of the assembled busbar C next to the front part of the substrate 1 with water cooling.

The connecting terminals 11 include a high-voltage DC terminal and an AC terminal for rectification.

Low-voltage connector 5 is made with the ability to transmit an excitation power signal, an excitation control signal and a feedback signal on the state of the power plant. Board 4 of the excitation circuit is made with the ability to process the excitation control signal to form a signal to control the operation of the ISVT assembly 2.

The four-quadrant power module according to this embodiment adopts a single-sided structural layout with a high degree of integration as a mechanical structure.

The two opposite edges of the water-cooled substrate 1 in the length direction are referred to as the front part and the back part, respectively. the water-cooled substrate 1 has two side surfaces. In the direction from one side to the other side, the multi-level constructions are sequentially: collective busbar 3, ISVT assembly 2, substrate 1 with water cooling, board 4 of the excitation circuit, low-voltage connector 5, node 15 of the handles. Where the ISVT assembly 2 is located on the surface of one side of the substrate 1 with water cooling. Since assembly 2

IZVT and board 4 of the excitation circuit are located on two sides of the substrate 1 with water cooling, respectively, the electromagnetic interference of the high-voltage signal on the board 4 because the excitation circuit can be effectively weakened. Towards the front side of the water-cooled substrate 1, on busbar C, there is a high-voltage DC terminal and an AC terminal for rectification. Towards the rear side of the water cooling pad 1, the control pin 10, the first water connection 8 and the second water connection 9 are located on the water cooling pad 1.

As for the four-quadrant power module according to this embodiment, the ISVT assembly 2 is electrically connected, respectively, to the busbar assembly C and the excitation circuit board 4, and the excitation circuit board 4 and the low-voltage connector 5 are electrically connected. Busbar assembly C is equipped with a high-voltage DC terminal and an AC terminal for rectification, which are electrically connected to the 2 IZVT assembly. Low voltage terminal 5, high voltage DC terminal and AC terminal for rectification are all connected to the external device.

The following will give a detailed description of the external device in the form of a power converter.

The rectifier AC terminal is the input part of ISVT assembly 2 and the high voltage DC terminal is the output part of ISVT assembly 2. Low-voltage connector 5 transmits the excitation power signal and the excitation control signal issued by the inverter. The excitation control signal is designed to control the operation of the four-quadrant power module. The excitation power signal provides operating power for board 4 of the excitation circuit. The low-voltage connector 5 transmits the excitation control signal to the board 4 of the excitation circuit. The excitation circuit board 4 processes the excitation control signal, produces a signal to control the operation of the ISVT assembly 2, and sends a signal to the ISVT assembly 2. Board 4 of the excitation scheme also receives a feedback signal on the state of the power plant, formed by assembly 2 ISVT. Board 4 of the excitation circuit transmits a feedback signal on the state of the power plant to the power converter through the low-voltage connector 5.

In this embodiment, the main circuit of the four-quadrant power module includes the ISVT assembly 2, and the main circuit uses busbars 3 for connection. The ISVT assembly 2 is made with the ability to convert alternating current electrical energy into direct current electrical energy. Since assembly 2 ISVT performs

From the on and off operation based on the signal issued by the excitation circuit board 4, rectification controllability can be realized compared to the use of a thyristor or a diode in the prior art. Since the assembled busbar C has a simple and compact design, the connection between high-current and high-voltage components can be made using a small space, thus guaranteeing a miniature implementation of a four-quadrant power module. Since the busbar C has a small parasitic inductance, the reliability of the four-quadrant power module is improved.

In this embodiment, the four-quadrant power module is based on the water-cooled substrate 1 and adopts the mode of two-way heat dissipation, and the IVT assembly 2 is located on the side surface of the water-cooled substrate 1. By circulating the cooling fluid in the water cooling channel of the water-cooled substrate 1, the heat generated by the operation of the ISVT assembly 2 is removed, thereby improving the cooling efficiency of the four-quadrant power module, while reducing the volume and guaranteeing the realization of a lightweight and miniature design for the system.

It should be noted that the type of water-cooled substrate 1 and the layout of the water cooling channel in the water-cooled substrate 1 in this embodiment are not particularly limited.

It should be noted that the number, shape and position of the mounting holes 7 in this embodiment are not particularly limited, and the mounting holes 7 are provided as needed. For example, the upper part and the lower part of the water-cooled substrate 1 are respectively equipped with one mounting hole 7 located in the front or rear part of the water-cooled substrate 1. For the sake of another example, the upper part and the lower part of the water-cooled substrate 1 are respectively provided with two installation holes 7, which are located, respectively, in the front part and the rear part of the water-cooled substrate 1.

It should be noted that the type and shape of the fastening elements in this embodiment are not particularly limited as long as they correspond to the shape of the mounting holes 7.

For example, fasteners can be bolts or screws.

It should be noted that the method of electrical connection between board 4 of the excitation circuit and assembly 2

ISVT in this embodiment is not particularly limited. For example, the electrical connection 60 can be made by using a mounting harness.

It should be noted that the positions of the board 4 of the excitation circuit and the low-voltage connector 5 in this embodiment are not particularly limited.

It should be noted that the methods of fastening the excitation circuit board 4, low-voltage connector 5 and substrate 1 with water cooling in this embodiment are not particularly limited. For example, the circuit board 4 of the excitation circuit and the low-voltage connector 5 can be attached to the assembly 15 of the handles, and then the assembly 15 of the handles is rigidly attached to the substrate 1 with water cooling. The design of the assembly of 15 handles in this embodiment is not particularly limited.

It should be noted that the number of boards 4 of the excitation circuit and low-voltage connectors 5 in this embodiment is not particularly limited, they can have a value of one or more.

It should be noted that the implementation of the assembly circuit 2 of the IOT in this embodiment is not particularly limited as long as the rectification function could be implemented.

Optionally, assembly 2 ISVT can include a single-phase full-bridge rectifier circuit containing four ISVTs. One AC terminal 13 for rectification is located between the two

IZVT of each arm of the bridge scheme. The two terminals of each arm of the bridge circuit are respectively electrically connected to the high voltage DC terminal.

Fig. 5 is a schematic diagram of the main circuit according to variant 1 of the implementation of this invention. As shown in fig. 5, NI, H2, VI and B2 are all IOVT. NI, H2, VI and B2 form a single-phase full-bridge rectifier circuit. Where NI and B1 form the input arm 53 (A) of the alternating current of the bridge circuit, and H2 and B2 form the input arm 54 (B) of the alternating current of the bridge circuit. 53 (A) and 54 (B) are the AC rectifier terminals, which are the rectifier input terminals of the four-quadrant power module. 51 (OS) and 52 (OS-) are DC terminals of high voltage, which are the output terminals of the rectification of the four-quadrant power module.

Optionally, a plate to protect the layout is accordingly located on the outside of each of the IZVT. The plate for the protection of the layout is electrically connected, respectively, to the board 4 of the excitation circuit and the corresponding IR.

The plate for protection of the layout is made with the ability to receive and transmit signals to the ISVT to limit voltage jumps and protect against short circuits.

More precisely, the plate for the protection of the layout can be installed directly on the terminal of the auxiliary electrical connection of the IZVT. By placing, in relation to each VT, a plate to protect the layout next to the VT, the protection efficiency of the ISVT excitation can be optimized, thereby improving the reliability of the system.

It should be noted that the method of electrical connection between the excitation circuit board and the layout protection plate in this embodiment is not particularly limited. For example, the electrical connection can be made by using a mounting harness.

Optionally, ISVTs are evenly distributed over the surface of substrate 1 with water cooling.

As a specific method of implementation, Fig. 4 - the schematic layout of the ISVT in the assembly of the IVT according to variant 1 of the implementation of this invention. As shown in Fig. 4, IZVT 6 are distributed on the substrate 1 with water cooling in the form of a 2x2 matrix, which saves space on the surface of the substrate 1 with water cooling and is useful for the miniaturization of the four-quadrant power module. (ZVT 6 are aligned with each other with plates 14 to protect the layout.

Optionally, the number of excitation control signals of the excitation circuit board is identical to the number of ZVT.

Optionally, the insulating element 13 is located between the connecting terminals 11 and the substrate 1 with water cooling.

More precisely, with the help of the location of the insulating element, insulation is provided between the water-cooled substrate and the connecting terminals, achieving a reliable electrical connection, improving the stability of the operation of the four-quadrant power module, and facilitating the implementation of a multilayer structure.

Optionally, as a specific implementation, the insulating element 13 includes an insulating support that coincides with the connecting terminals 11 in position. The inserted nut is located inside the insulating support.

Optionally, the excitation circuit board 4 is located inside the arm assembly 15.

Optionally, the handle assembly cover 18 is additionally located on the handle assembly 15.

By placing the cover 18 of the handle unit, the handle unit 15 forms a relatively closed space, which reduces the influence of external high-voltage electromagnetic interference on the board 4 of the excitation circuit. 60 Optionally, the protective bracket 12 is located on the outside of the busbar 3.

The protective bracket 12 is made with the ability to protect the collective busbar C and the ISVT assembly 2.

It should be noted that the shape and position of the protective bracket in this embodiment are not particularly limited.

Optionally, the first handle 16 and the second handle 17 are located in the node 15 of the handles. The first handle 16 is located in the upper part and the lower part of the assembly 15 handles, and the second handle 17 is located in the front part and/or the rear part of the assembly 15 handles.

With the help of the location of the first handle and the second handle, it is convenient for the worker to insert and remove the four-quadrant power module.

This variant of implementation provides a four-quadrant power module, which includes a substrate with water cooling, a ZVT assembly, a busbar assembly, an excitation circuit board, a low-voltage connector and a handle assembly. As for the four-quadrant power module according to this embodiment, the main circuit of the four-quadrant power module takes over the busbar assembly for connection, and the controlled rectification is carried out by the IOT assembly, thereby improving the stability and reliability of the four-quadrant power module. At the same time, the power module adopts the water-cooled heat dissipation method, which reduces the volume and is beneficial for miniaturization and light weight.

In conclusion, it should be noted that the above embodiments are intended only to describe the technical solutions of this invention, rather than the limitations of this invention. Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that they may nevertheless make modifications to the technical solutions described in the above embodiments, or make equivalent substitutions for some or all of the technical features in them, and these modifications or replacements do not make the essence of the corresponding technical solutions such that it comes out of the scope of the technical solutions of the embodiments of this invention.

Claims (1)

FORMULA OF THE INVENTION 1. A four-quadrant power module containing a water-cooled substrate, an assembly of Zo bipolar transistors with an isolated gate (SVT), a busbar, an excitation circuit board, a low-voltage connector and a handle assembly; the VT assembly is located on the surface of one side of the substrate with water cooling, the busbar assembly is located on the outside of the IV assembly; the board of the excitation circuit, the low-voltage connector and the assembly of the handles are located on the other 35 side of the substrate with water cooling; the first water connection, the second water connection and the control pin are located on the side surface of the rear part of the water-cooled substrate; installation holes are located, respectively, in the upper part and lower part of the substrate with water cooling; the installation position of the four-quadrant power module is fixed 40 by inserting fasteners into the installation holes; the ISVT assembly is electrically connected, respectively, to the collective busbar and the excitation circuit board; the board of the excitation circuit is electrically connected to the low-voltage connector; the connecting terminals electrically connected to the I2VT assembly are located on the side surface of the assembled busbar near the front part of the water-cooled substrate; 45 connection terminals include a high-voltage DC terminal and an AC terminal for rectification; the low-voltage connector is made with the ability to transmit an excitation power signal, an excitation control signal and a feedback signal on the state of the power plant; the excitation circuit board is configured to process the excitation control signal to generate a signal to control the operation of the IC2VT assembly. 2. Four-quadrant power module according to claim 1, in which the I12VT assembly contains a single-phase full-bridge rectifier circuit containing four ISVT; and one AC terminal for rectification is located between the two I2VTs of each arm of the bridge circuit; the two terminals of each arm of the bridge circuit are electrically connected respectively to the high voltage DC terminal 55. C. A four-quadrant power module according to claim 2, in which a layout protection plate is located on the outer side of each of the ISVTs, respectively; the plate to protect the layout is electrically connected according to the board of the excitation circuit and the corresponding ISVT; the plate to protect the layout is made with the ability to receive and transmit signals to ISVT to limit voltage jumps and protect against short circuits. 4. Four-quadrant power module according to claim 2, in which the number of excitation control signals of the excitation circuit board is identical to the number of ISVT. 5. A four-quadrant power module according to any one of claims 1-4, in which the insulating element is located between the connecting terminals and the water-cooled substrate. 6. Four-quadrant power module according to claim 5, in which the insulating element contains an insulating resistance that coincides with the connecting terminals in position; the embedded nut is located inside the insulating support. 7. A four-quadrant power module according to any one of claims 1-4, in which all mountings of the excitation circuit board and low-voltage disconnection are based on the installation of the handle assembly. 8. A four-quadrant power module according to any one of claims 1-4, in which the first handle and the second handle are located on the handle assembly; the first handle is located at the top and bottom of the handle assembly, and the second handle is located at the front and/or rear of the handle assembly. y U I M Z x x . х х х atA х че гак Ку Х, со МНЕ н, ШИ пн НН У ; ! where am I! I E: m cha NANNYA x hi y Z - NO. g B nn. M. I KI Y san s3 5 Оу Z х х RE ш | FO TV x VK E; lex E V SHE For EE SHEU and shk IY . With e I and the thing and. ka (in FO Already. in: KE KO. i Kosova "V r I ee NINI 15 e t u E yo, t - 18 ; t she Z Kg y. 5 vl GO Z y we oo sho. same 3 y ! sho ra rashano 1 Fig. 1