CN219329616U - Multi-parallel high-power switching power supply system - Google Patents
Multi-parallel high-power switching power supply system Download PDFInfo
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- CN219329616U CN219329616U CN202320795414.2U CN202320795414U CN219329616U CN 219329616 U CN219329616 U CN 219329616U CN 202320795414 U CN202320795414 U CN 202320795414U CN 219329616 U CN219329616 U CN 219329616U
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Abstract
The utility model relates to the technical field of power control, and particularly discloses a multi-parallel high-power switching power supply system, wherein each independent power supply device can work as an independent high-power supply, the total output current data of each independent power supply device after being connected in parallel can be collected through a current sensor, the total output current data is transmitted to a main power supply controller, the main power supply controller generates corresponding digital control signals according to the total output current data, and the digital control signals are transmitted to each independent power supply device in a broadcasting mode through a communication link, so that each independent power supply device performs power output regulation and control, and the digital closed-loop control of the whole system is realized. The utility model can realize the digital closed-loop control of each parallel independent power supply device, and each independent power supply device has a parallel structure, is mutually independent, is not interfered with each other, is not influenced by quantity, can be put into and withdrawn from at any moment, has high parallel output power, and has high signal transmission speed, strong anti-interference and high stability.
Description
Technical Field
The utility model belongs to the technical field of power control, and particularly relates to a multi-parallel high-power switching power supply system.
Background
In order to increase output power, most of the current power supply systems adopt a technical scheme of parallel connection of multiple power supplies. However, the existing multi-power supply parallel connection mode mostly adopts a master-slave structure of a daisy chain mode, namely, a first module works, then a second module works, and the like, and all modules work in sequence; the biggest defect of the mode is that after the first module fails, the whole system is in a failure state, and meanwhile, the failure information is transmitted forwards from the last module; meanwhile, analog signals are adopted for transmission, the more power supplies are connected in parallel, the more attenuation of reference signals is, and output may not be uniform; and the parallel power supply modules are limited, and an auxiliary controller is needed to be added to keep the current sharing of the working modules when the number of the parallel power supply modules exceeds a certain number, so that the application is very limited.
Disclosure of Invention
The utility model aims to provide a multi-parallel high-power switching power supply system which is used for solving the problems in the prior art.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides a multi-parallel high-power switch power supply system which comprises a main power supply controller, a current sensor and a plurality of independent power supply devices, wherein the signal output end of the main power supply controller is connected in parallel to the signal receiving end of each independent power supply device through a communication link, the output end of each independent power supply device is connected in parallel to the current sensor, the output end of the current sensor is connected with the data acquisition end of the power supply controller in parallel, the current sensor is used for acquiring total output current data of each independent power supply device after being connected in parallel and transmitting the total output current data to the main power supply controller, the main power supply controller is used for receiving the total output current data, generating digital control signals, transmitting the digital control signals to each independent power supply device through the communication link, and each independent power supply device is used for carrying out output control according to the digital control signals.
When the system is applied, each independent power supply device can work as an independent high-power supply, the total output current data of each independent power supply device after being connected in parallel can be collected through the current sensor, the total output current data is transmitted to the main power supply controller, the main power supply controller generates corresponding digital control signals according to the total output current data, and the digital control signals are transmitted to each independent power supply device in a broadcasting mode through the communication link, so that each independent power supply device carries out power supply output regulation and control, and the digital closed-loop control of the whole system is realized.
In one possible design, the communication link comprises a fiber optic link.
In one possible design, the signal output end of the main power supply controller is provided with an optical signal output circuit, and the signal receiving end of each independent power supply device is provided with an optical signal receiving circuit, wherein the optical signal output circuit is used for converting a digital control signal into an optical signal and transmitting the optical signal to the optical fiber link, and the optical signal receiving circuit is used for receiving the optical signal from the optical fiber link and converting the optical signal into the digital control signal.
In one possible design, the communication link includes a network switch connected to the signal receiving terminals of the individual power supply devices via an industrial bus and to the signal output terminals of the main power supply controller via a network cable.
In one possible design, the independent power supply device comprises an internal power supply controller, and a rectifying circuit, a low-frequency filtering circuit, an inverter circuit, a high-frequency rectifying circuit and a high-frequency filtering circuit which are sequentially connected, wherein the internal power supply controller is used for receiving a digital control signal of a main power supply controller and outputting a regulating signal to the inverter circuit, the rectifying circuit is used for switching in mains supply to rectify to obtain an input direct current, the low-frequency filtering circuit is used for filtering the input direct current and transmitting the filtered input direct current to the inverter circuit, the inverter circuit is used for receiving the regulating signal of the internal power supply controller and carrying out inverse voltage regulation on the filtered input direct current according to the regulating signal to output a high-frequency alternating current to the high-frequency rectifying circuit, the high-frequency rectifying circuit is used for rectifying the high-frequency alternating current to obtain direct current pulse electricity, and the high-frequency filtering circuit is used for filtering the direct current pulse electricity to obtain the filtered output direct current.
In one possible design, the independent power supply device further comprises a sampling circuit, an input end of the sampling circuit is connected in parallel with an output end of the high-frequency filter circuit, an output end of the sampling circuit is connected with an internal power supply controller, the sampling circuit is used for sampling output direct current of the high-frequency filter circuit to obtain a sampling signal, the sampling signal is transmitted to the internal power supply controller, and the internal power supply controller is used for outputting a PWM pulse regulation signal to the inverter circuit after receiving the sampling signal and the digital control signal.
In one possible design, the main power controller is also connected to a local touch screen through an RS232 interface.
In one possible design, the main power controller is also connected to a remote central control system through an RJ45 interface.
The beneficial effects are that: the utility model can realize the digital closed-loop control of each parallel independent power supply device, and has good repeatability; the independent power supply devices are of parallel structures, independent from each other, and not interfering with each other and not influenced by quantity; each independent power supply device can be controlled by the main power supply controller, can be switched on and off at any time, and has high parallel output power; the closed-loop control is carried out through digital signal transmission, so that the signal transmission speed is high, the anti-interference performance is strong, and the stability is high.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of outer loop control of a system according to an embodiment;
FIG. 2 is a schematic diagram of communication control of the system in an embodiment;
FIG. 3 is a schematic circuit diagram of an optical signal output circuit according to an embodiment;
FIG. 4 is a schematic circuit diagram of an optical signal receiving circuit according to an embodiment;
FIG. 5 is a schematic diagram of a stand-alone power supply device according to an embodiment;
FIG. 6 is a schematic diagram of a rectifying circuit according to an embodiment;
FIG. 7 is a schematic diagram of a low frequency filter circuit according to an embodiment;
fig. 8 is a schematic circuit diagram of an inverter circuit in an embodiment;
FIG. 9 is a schematic circuit diagram of a high frequency rectifier circuit according to an embodiment;
FIG. 10 is a circuit diagram of a high frequency filter circuit according to an embodiment;
fig. 11 is a circuit schematic diagram of a sampling circuit in an embodiment.
Detailed Description
It should be noted that the description of these examples is for aiding in understanding the present utility model, but is not intended to limit the present utility model. Specific structural and functional details disclosed herein are merely representative of example embodiments of the utility model. This utility model may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.
It will be appreciated that the term "coupled" is to be interpreted broadly, and may be a fixed connection, a removable connection, or an integral connection, for example, unless explicitly stated and limited otherwise; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in the embodiments can be understood by those of ordinary skill in the art according to the specific circumstances.
In the following description, specific details are provided to provide a thorough understanding of example embodiments. However, it will be understood by those of ordinary skill in the art that the example embodiments may be practiced without these specific details. For example, a system may be shown in block diagrams in order to avoid obscuring the examples with unnecessary detail. In other embodiments, well-known processes, structures, and techniques may be shown without unnecessary detail in order to avoid obscuring the embodiments.
Examples:
the embodiment provides a multi-parallel high-power switch power supply system, as shown in fig. 1-2, the multi-parallel high-power switch power supply system comprises a main power supply controller, a current sensor and a plurality of independent power supply devices, wherein a signal output end of the main power supply controller is connected to a signal receiving end of each independent power supply device in parallel through a communication link, an output end of each independent power supply device is connected to the current sensor in parallel, an output end of the current sensor is connected with a data acquisition end of the power supply controller, the current sensor is used for acquiring total output current data after each independent power supply device is connected in parallel, the total output current data is transmitted to the main power supply controller, the main power supply controller is used for receiving the total output current data, generating digital control signals, and transmitting the digital control signals to each independent power supply device through the communication link, wherein each independent power supply device is used for carrying out output control according to the digital control signals.
Optionally, the communication link includes an optical fiber link, a signal output circuit is disposed at a signal output end of the main power controller, and an optical signal receiving circuit is disposed at a signal receiving end of each independent power supply device, and is configured to convert a digital control signal into an optical signal, transmit the optical signal to the optical fiber link, and the optical signal receiving circuit is configured to receive the optical signal from the optical fiber link and convert the optical signal into the digital control signal. The main power supply controller acquires the total output current data of the current sensor DCCT in real time through a corresponding data acquisition end, obtains a digital control signal through PID (proportion integration differentiation) adjustment, converts the digital control signal into an optical signal through an optical signal output circuit shown in figure 3, and transmits the optical signal to each independent power supply device in a broadcast mode through a high-speed optical fiber jumper HFBR-1414TZ, so that outer loop control is realized, and each independent power supply device converts the optical signal into the digital control signal through an optical signal receiving circuit shown in figure 4 for use.
Optionally, the communication link includes a network switch, and the network switch is connected to the signal receiving end of each independent power supply device through an industrial bus, and is connected to the signal output end of the main power supply controller through a network cable. The main power supply controller is also connected with a local touch screen through an RS232 interface, and corresponding parameter setting and running state monitoring display of the main power supply controller can be realized through the local touch screen. The main power supply controller is also connected with the remote central control system through an RJ45 interface, adopts the RJ45 interface, runs TCP/TP protocol, and can be in signal butt joint with the remote central control system so as to realize corresponding parameter setting and running state monitoring of the main power supply controller through the remote central control system.
Optionally, each independent power supply device is a complete switching power supply, and the switching power supply adopts a power semiconductor device as a switching element, and the duty ratio of the switching element is controlled to adjust the output voltage by periodically switching on and off. As shown in fig. 5, the independent power supply device includes an internal power supply controller, a rectifying circuit, a low-frequency filter circuit, an inverter circuit, a high-frequency rectifying circuit, and a high-frequency filter circuit, which are sequentially connected.
As shown in fig. 6, the rectification circuit is used for switching in three-phase ac mains supply to perform rectification processing, so as to obtain corresponding input dc. As shown in fig. 7, the low-frequency filtering circuit is configured to perform filtering processing on the input dc and transmit the filtered input dc to the inverter circuit; the low-frequency filter circuit mainly comprises an LC filter, and the LC filter is a filter circuit formed by utilizing the combination design of an inductor and a capacitor, can cut off or pass signals in a certain frequency range, and has the advantages of simple structure, low cost, higher operation reliability, lower operation cost and the like; the direct current signal of the commercial power after rectification is a pulse signal, has extremely large low-frequency alternating current ripple, and obtains a clean direct current signal after LC filtering, and the better the filtering effect is, the higher the quality of the whole power supply is.
As shown in fig. 8, the inverter circuit is configured to receive a regulation signal of the internal power controller, perform inverse transformation voltage regulation on the filtered input dc according to the regulation signal, and output a high-frequency ac to the high-frequency rectifying circuit; the PWM inversion, which is inversion of a switching power supply, is a circuit that adjusts an output voltage by adjusting a pulse frequency and a duty ratio, and changes a direct current into a high-frequency alternating current; the inversion part consists of an IBGT (insulated gate bipolar transistor), a supporting capacitor and a filter capacitor, 6 IGBTs (insulated gate bipolar transistor), 12 paths of PWM (pulse width modulation) pulses are needed, each two IGBTs form a ZVS (zero voltage switching) circuit, the phase staggering between the 3 paths of ZVS circuits is 120 degrees, and the control frequency can reach 99K, so that the output high-frequency ripple wave is greatly reduced, and the power supply precision is improved; a 3-way complete ZVS inverter circuit is shown in fig. 8.
As shown in fig. 9, the high-frequency rectification circuit is used for rectifying the high-frequency alternating current to obtain direct-current pulse power; the high-frequency rectifying circuit consists of two parts, wherein one part is a high-frequency transformer T1, the high-frequency transformer T1 is used for converting high-frequency alternating current into voltage required by output, and meanwhile, the high-frequency rectifying circuit has the function of isolating direct current and also has the function of isolating input and output, and the other part is a rectifying part, and a bridge type circuit and the like are formed by high-frequency fast recovery diodes so as to rectify high-frequency alternating current into pulsating direct current. As shown in fig. 10, the high-frequency filtering circuit is configured to perform filtering processing on the dc pulse power to obtain a filtered output dc power; the high-frequency filtering also adopts LC filtering, L is a high-frequency inductor, C is a high-frequency capacitor, the high-frequency filter uses the filtering inductor L to inhibit high-frequency harmonic waves, and uses the high-capacity filtering capacitor C to inhibit high-frequency pulse waves, so that the filtering function of the high-frequency harmonic waves is realized through a reasonable structure, and high-quality direct current is obtained.
As shown in fig. 11, the independent power supply device further includes a sampling circuit, an input end of the sampling circuit is connected in parallel with an output end of the high-frequency filter circuit, an output end of the sampling circuit is connected with an internal power supply controller, the sampling circuit is used for sampling output direct current of the high-frequency filter circuit to obtain a sampling signal, the sampling signal is transmitted to the internal power supply controller, and the internal power supply controller is used for outputting a PWM pulse regulation signal to the inverter circuit after receiving the sampling signal and the digital control signal. The sampling circuit comprises an input bus sampling, an output voltage sampling and an output current sampling; the output current is sampled by adopting a current Hall sensor, so that closed-loop control is realized; the input bus sampling and the output voltage sampling are mainly used for display and protection, the input bus sampling is completed by adopting a voltage Hall sensor, and the output voltage sampling is completed by adopting a resistor network.
The internal power supply controller is used for receiving the digital control signal of the main power supply controller and outputting a regulating and controlling signal to the inverter circuit to realize the internal loop control of the independent power supply device, namely, the self control of the independent power supply device is completed. The inner power supply controller collects sampling signals through the sampling circuit and carries out PID regulation processing on the sampling signals and digital control signals issued by the main power supply controller of the outer ring, PWM pulse regulation signals are generated, and the PWM pulse regulation signals are utilized to control the pulse width of the inverter circuit IGBT, so that the inner ring control of the independent power supply device is realized.
Finally, it should be noted that: the foregoing description is only of the preferred embodiments of the utility model and is not intended to limit the scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (8)
1. The utility model provides a many parallelly connected high-power switch power supply system which characterized in that, includes main power supply controller, current sensor and a plurality of independent power supply unit, the signal output part of main power supply controller connects in parallel to each independent power supply unit's signal receiving part through communication link, and each independent power supply unit's output connects in parallel to current sensor, current sensor's output and power supply controller's data acquisition end, current sensor is used for gathering the total output current data after each independent power supply unit connects in parallel to with total output current data transmission to main power supply controller, main power supply controller is used for receiving total output current data, generates digital control signal, transmits digital control signal to each independent power supply unit through communication link, and each independent power supply unit is used for carrying out output control according to digital control signal.
2. A multiple parallel high power switching power supply system according to claim 1, wherein said communications link comprises a fiber optic link.
3. The multi-parallel high-power switching power supply system according to claim 2, wherein the signal output end of the main power supply controller is provided with an optical signal output circuit, the signal receiving end of each independent power supply device is provided with an optical signal receiving circuit, the optical signal output circuit is used for converting a digital control signal into an optical signal, transmitting the optical signal to the optical fiber link, and the optical signal receiving circuit is used for receiving the optical signal from the optical fiber link and converting the optical signal into the digital control signal.
4. The multiple parallel high power switching power supply system according to claim 1, wherein the communication link comprises a network switch, and the network switch is connected to the signal receiving end of each independent power supply device through an industrial bus and is connected to the signal output end of the main power supply controller through a network cable.
5. The multi-parallel high-power switching power supply system according to claim 1, wherein the independent power supply device comprises an internal power supply controller, and a rectifying circuit, a low-frequency filtering circuit, an inverter circuit, a high-frequency rectifying circuit and a high-frequency filtering circuit which are sequentially connected, wherein the internal power supply controller is used for receiving a digital control signal of a main power supply controller and outputting a regulating signal to the inverter circuit, the rectifying circuit is used for being connected with mains supply to rectify to obtain an input direct current, the low-frequency filtering circuit is used for filtering the input direct current and transmitting the filtered input direct current to the inverter circuit, the inverter circuit is used for receiving the regulating signal of the internal power supply controller and performing inversion voltage regulation on the filtered input direct current according to the regulating signal, the high-frequency rectifying circuit is used for rectifying the high-frequency alternating current to obtain direct current pulse electricity, and the high-frequency filtering circuit is used for filtering the direct current pulse electricity to obtain the filtered output direct current.
6. The multi-parallel high-power switching power supply system according to claim 5, wherein the independent power supply device further comprises a sampling circuit, an input end of the sampling circuit is connected in parallel with an output end of the high-frequency filter circuit, an output end of the sampling circuit is connected with an internal power supply controller, the sampling circuit is used for sampling output direct current of the high-frequency filter circuit to obtain a sampling signal, the sampling signal is transmitted to the internal power supply controller, and the internal power supply controller is used for outputting a PWM pulse regulation signal to the inverter circuit after receiving the sampling signal and the digital control signal.
7. The multiple parallel high power switching power supply system according to claim 1, wherein the main power supply controller is further connected to a local touch screen through an RS232 interface.
8. A multiple parallel high power switching power supply system according to claim 1, wherein said main power supply controller is further connected to a remote central control system via an RJ45 interface.
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| CN202320795414.2U CN219329616U (en) | 2023-04-11 | 2023-04-11 | Multi-parallel high-power switching power supply system |
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| CN202320795414.2U CN219329616U (en) | 2023-04-11 | 2023-04-11 | Multi-parallel high-power switching power supply system |
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