CN110797856A - Power supply device control method and power supply device - Google Patents

Abstract

The present application discloses a power supply control method and power supply device, the power supply device includes a plurality of power supply modules, each of the power supply modules includes a control circuit and a switching device connected between a current sharing bus and a ground wire, the control The circuit is used to control the on-off of the switching device, and a preset voltage is set on the current-sharing bus. Specifically, for each control circuit, when the control circuit is initialized, the switching device is controlled to be turned on to ground the current sharing bus, and then after the power module is started, the switching device is controlled to be turned off to enable The current-sharing bus is released from the ground, and then it is judged whether the voltage of the current-sharing bus is less than the preset voltage; finally, when the voltage of the current-sharing bus is greater than or equal to the preset voltage, the power module is controlled to output electrical energy. In this embodiment, the multiplexing of the current sharing bus and the synchronous switch bus is realized by arranging switching devices, thereby simplifying the hardware structure of the entire power supply device.

Description

Power supply device control method and power supply device

technical field

The present application relates to the field of power supply technology, and in particular, to a power supply device control method and a power supply device.

Background technique

When supplying power to the load, in order to ensure high power output, the power modules will be designed in parallel. When multiple power modules are running in parallel, due to the difference between the power modules and the difference in the contact impedance between each power module and the support, the output voltage of each power module will not be exactly the same, so it is impossible to guarantee each power supply. The load current of the module is exactly the same. Therefore, in the case of heavy load, it is easy to occur that one of the power modules has over-current protection, which in turn leads to the problem of over-current protection and shutdown of the cameras of other power modules. That is to say, the power-on time and power-off time of different power modules Not consistent.

SUMMARY OF THE INVENTION

In order to overcome the above deficiencies in the prior art, the present invention provides a power supply device control method and a power supply device.

In a first aspect, the purpose of the present application is to provide a method for controlling a power supply device, the power supply device includes a plurality of power supply modules, each of the power supply modules includes a control circuit and a switching device, the switching device is connected between the current sharing bus and the Between the ground wires, the control circuit is used to control the on-off of the switching device, the preset voltage is set on the current sharing bus, and the method includes:

For each control circuit, when the control circuit is initialized, the switching device is controlled to be turned on to ground the current sharing bus, wherein the power module initialization includes configuring ports and registers of the power module;

After the startup of the power supply module is completed, the switching device is controlled to be disconnected to release the grounding of the current sharing bus;

judging whether the voltage of the current sharing bus is less than the preset voltage;

If the voltage of the current sharing bus is greater than or equal to the preset voltage, the power module is controlled to output electric energy.

Optionally, before the judging whether the voltage of the current sharing bus is less than the preset voltage, the step further includes:

determining whether a power-on command is detected, wherein the power-on command is used to control whether to allow the power supply module to output power;

The step of judging whether the voltage of the current sharing bus is less than the preset voltage includes:

If the power-on command is detected, it is determined whether the voltage of the current sharing bus is less than the preset voltage.

Optionally, before the step of controlling the switching device to be disconnected to release the grounding of the current sharing bus after the power supply module is started up, the method further includes:

obtaining the operating state parameters of the power module;

Start the power module according to the operating state parameter;

Wherein, the operating state parameter is data representing the operating state of the power supply module, and the operating state parameter includes the input voltage, output voltage, output current and temperature of the power supply module.

Optionally, the step of starting the power module according to the operating state parameter includes:

Determine whether the power module is faulty according to the operating state parameter;

If there is no fault in the power supply module, the startup of the power supply module is completed.

Optionally, the step of judging whether the power supply module is faulty according to the operating state parameter includes:

Determine whether the input voltage is within a first preset voltage range, whether the output voltage is within a second preset voltage range, whether the output current is within a preset current range, and whether the temperature is lower than a preset temperature ;

If the input voltage is within the first preset voltage range, the output voltage is within the second preset voltage range, the output current is within the preset current range, and the temperature is less than the preset voltage range If the temperature is set, there is no fault in the power module.

Optionally, the step of controlling the power supply module to output electrical energy includes:

calculating a duty cycle according to the input voltage and the output voltage of the power module;

The power module is controlled to output an output voltage consistent with the duty cycle.

Optionally, after the step of controlling the power supply module to output electrical energy, the method further includes:

In any power module, after judging that there is a shutdown command, if there is a shutdown command, the switching device is controlled to be turned on to ground the current sharing bus;

For each control circuit, detect the voltage of the current sharing bus;

If the voltage of the current sharing bus is less than the preset voltage, controlling the power module to stop outputting electric energy;

Wherein, the shutdown instruction is an instruction for controlling the control circuit of the power supply device to stop outputting electric energy.

Another object of the present application is to provide a power supply device, the power supply device includes a plurality of power supply modules, each of the power supply modules includes a control circuit and a switching device, the switching device is connected between a current sharing bus and a ground wire , the control circuit is used to control the on-off of the switching device, and a preset voltage is set on the current sharing bus.

Optionally, an initial state of the switching device is an off state, and the initial state is a state before the power module is started up.

Optionally, the switching device is a fully-controlled switch, the fully-controlled switch includes a control terminal, a high-voltage terminal and a low-voltage terminal, and the control terminal of the switching device is connected to the output port of the control circuit, so the The low voltage terminal of the switching device is connected to the ground wire, and the high voltage terminal of the switching device is connected to the current sharing bus.

Compared with the prior art, the embodiments of the present application have the following beneficial effects:

In the embodiment of the present application, by adding a switching device that can control the voltage of the current sharing bus to the power module in the power supply equipment, firstly, the current sharing bus is grounded by controlling the switching device, and then the switching device is controlled to make the current sharing bus Release the grounding, and when the current sharing bus is released from the grounding, start the power module to output power at the same time. When the current-sharing bus is released from the ground, the voltage value on the current-sharing bus increases, and the control circuits of each power module can acquire the increased voltage on the current-sharing bus at almost the same time, and according to the increased voltage on the current-sharing bus The output voltage of the power supply module is controlled. Therefore, in this embodiment, each power supply module can start outputting power at the same time, that is, each power supply module can output power synchronously.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following drawings will briefly introduce the drawings that need to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a structural diagram of controlling an output voltage through a synchronization signal according to an embodiment of the present application;

FIG. 2 is a comparison diagram 1 of the changes of the output power supply voltage and the output voltage provided by the embodiment of the present application;

FIG. 3 is a comparison diagram 2 between the output power supply voltage and the change of the output voltage provided by the embodiment of the present application;

FIG. 4 is a schematic structural diagram of a power supply device provided by an embodiment of the present application;

FIG. 5 is a schematic flowchart 1 of a method for controlling a power supply device provided by an embodiment of the present application;

6 is a second schematic flowchart of a method for controlling a power supply device according to an embodiment of the present application;

7 is a third schematic flowchart of a method for controlling a power supply device according to an embodiment of the present application;

FIG. 8 is a fourth schematic flowchart of a method for controlling a power supply device according to an embodiment of the present application.

Icons: 1-synchronous circuit; 2-synchronous bus; 3-power module; 31-control circuit; 32-sampling circuit; 4-current sharing bus; 5-switching device.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but is merely representative of selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "arrangement", "installation", "connection" and "connection" should be interpreted in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.

When supplying power to the load, in order to ensure high power output, the power modules 3 are designed in parallel. When multiple power modules 3 are operated in parallel, due to the difference between the power modules 3 and the difference in the contact impedance between each power module 3 and the support, the output voltage of each power module 3 will not be completely consistent, so it is impossible to Make sure that the load current of each power module 3 is exactly the same. Therefore, when the load is heavy, one of the power modules 3 is prone to over-current protection, which in turn causes the other power modules 3 to be shut down due to over-current protection successively. One of the reasons for this problem is that in each power supply module 3, the variation of the auxiliary power supply is inconsistent, and the accuracy of the auxiliary power supply voltage is also inconsistent. The timing of outputting power and the timing of stopping power output are inconsistent. That is to say, when controlling each power supply module 3 to start outputting electric energy and stop outputting electric energy, the controller works under the auxiliary voltage, and the value of the auxiliary voltage will have a great influence on the output result of the controller. In order to solve this problem, a common practice is to add a synchronization signal generating circuit and a synchronization bus 2, so as to control the output voltage of each power module 3 through the synchronization signal. Please refer to Figure 1. In Figure 1, Sync represents the input port of the input synchronization signal on the controller, I _share represents the voltage signal of the current sharing bus 4 collected by the sampling current, and AD is the current sharing collected by the input sampling current on the controller The input port of the voltage signal of bus bar 4.

Taking the voltage level of the auxiliary voltage as 3.3V as an example, each independent power supply has the following problems due to the difference of its components: the rising slope of the auxiliary power supply 3.3V is inconsistent; the accuracy of the auxiliary power supply voltage is inconsistent, for example, some of the power modules 3 The auxiliary power supply voltage of 3 is equal to 3.25V, and the auxiliary power supply voltage of the other part of the power supply module 3 is equal to 3.35V. The inconsistency of the 3.3V voltage accuracy will lead to deviations in the internal calculation reference of the digital power chip, which will further affect the accuracy of the sampled voltage signal of the digital power chip.

Please refer to Figure 2. Figure 2 is a comparison diagram of the changes in the auxiliary power supply voltage and output voltage caused by calculating the reference deviation. The abscissa in the two coordinate systems represents time, and the ordinate in the upper coordinate system represents the auxiliary power supply voltage. The ordinate of the lower coordinate system represents the output voltage of the power supply module, that is, the output voltage of the power supply. The auxiliary voltage causes a significant delay in the digital control sequence. If the 3.3V voltage has a fast rising slope, the digital power supply will output power first; and if the rising slope is slow, the power will be output later. In this way, the output voltage of each independent power supply module 3 will have obvious deviation when the power supply equipment starts to output electric energy.

Please refer to FIG. 3. FIG. 3 is a comparison diagram of the changes of the auxiliary power supply voltage and the output voltage caused by the accuracy of the auxiliary voltage sampling voltage signal. Among them, the abscissa in the two coordinate systems represents time, the ordinate of the upper coordinate system represents the auxiliary power supply voltage, and the ordinate of the lower coordinate system represents the output voltage of the power module, that is, the output voltage of the power supply. As a result, the accuracy of the sampled voltage signal of the digital power chip is inconsistent, which not only results in inconsistent determination of the time to start outputting power, but also at the same time, it can be considered that different power modules 3 have different judgment conditions for starting to output power, so different power modules 3 will issue different start command to output electrical energy. As a result, the output voltages of different power modules 3 cannot be kept completely consistent.

Therefore, when multiple power supply modules 3 are connected in parallel, the deviation of the digital power supply voltage directly affects the moment when the power supply module 3 starts to output electric energy and the amplitude of the output voltage at the same moment. However, the output voltage of each module cannot be completely consistent, so that the output load current capability of each module is different. Wherein, each dotted box represents a power module 3 . In order to solve the situation that the power supply equipment cannot operate normally due to the overcurrent of other power supply modules 3 caused by the uneven current in the paralleled power supply modules 3, it is necessary to carry out the calculation of the time when each power supply module 3 starts to output electric energy and stops outputting electric energy. control. Please refer to FIG. 1 , which is a schematic structural diagram of a power supply device using a synchronous bus 2 in the prior art. In the prior art, in order to solve the problem of inconsistent time when each power supply module 3 in the power supply equipment starts to output electric energy, a separate synchronization bus 2 is set up, so that the synchronization signal in the synchronization bus 2 is used to control each power supply module 3 to start outputting electric energy synchronously or Synchronous stop output power. However, the way of adding a separate synchronization bus 2 will make the circuit structure of the power supply equipment more complicated and the cost will be higher.

Please refer to FIG. 4. FIG. 4 provides a schematic structural diagram of a power supply device that can be used to solve the above problems according to an embodiment of the present application. The power supply device includes a plurality of power supply modules 3, and each of the power supply modules 3 includes a control circuit 31 and a switch. Device 5, each power supply module 3 may also include a power converter and other circuit structures, the switching device 5 is connected between the current sharing bus 4 and the ground wire, and the control circuit 31 is used to control the switching device 5 is on and off, and a preset voltage is set on the current sharing bus 4 .

In this embodiment, the control circuit 31 is also used to control the output voltage of the power supply module 3 . The control circuit 31 includes a controller, and the controller is configured with an input port for inputting data and an output port for outputting a signal. The controller may be, but is not limited to, a digital control chip such as a single-chip microcomputer, a DSP (Digital Signal Processing, digital signal processing).

In this embodiment, the current sharing bus 4 is connected to the output end of each power supply module 3 , and generates a current sharing signal according to the output voltage of each power supply module 3 .

In this embodiment, the switching device 5 is connected between the controller and the current-sharing bus 4, so that the controller can control the on-off of the switching device 5, thereby controlling the voltage on the current-sharing bus 4 to control The output voltage of the power module 3. In this way, the multiplexing of the current sharing bus 4 can be realized (both as the current sharing bus 4 and the synchronization bus 2), so that the current sharing bus 4 can not only provide a reference point for the power module 3 to adjust its own voltage, but also can be used as a Whether the output voltage of the power supply module 3 is controlled to provide a reference point, the separate setting of the synchronous circuit 1 and the synchronous bus 2 (synchronous switch bus) is eliminated, and the circuit structure is simplified. The cost of the power supply equipment can be reduced. In addition, since each power supply module 3 starts to output electric energy according to the voltage on the current sharing bus 4, when the voltage on the current sharing bus 4 changes, each power module 3 can almost immediately detect the voltage on the current sharing bus 4 at the same time. Therefore, the present embodiment can also avoid the problem of time delay and improve the reliability of the power supply device.

Optionally, in this embodiment, the switching device 5 is a circuit breaker or a fully controlled switch, wherein the fully controlled switch includes, but is not limited to, a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor, Field effect transistor), IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor), GTO (gate turn-off thyristor, gate can be cut off thyristor), triode and so on. For example, the use of GTO in the switching device 5 can reduce the time for the power supply device to control the output power, and improve the response efficiency of the power supply device.

The ground wire refers to a potential point with a voltage of 0V or other potential points less than the preset voltage.

Optionally, in this embodiment, the initial state of the switching device 5 is an off state, and the initial state is the state before the power module 3 is started up. For example, when the switching device 5 is a circuit breaker, in the initial state, the circuit breaker is in a disconnected state, and when the switching device 5 is a fully-controlled switch, in the initial state, the fully-controlled switch is in an open state. Off state, that is, the switching device 5 is in an off state.

Optionally, in this embodiment, when the preset voltage is set, the current sharing bus 4 can be connected to a constant voltage power supply, so that the voltage of the constant voltage power supply is used as the preset voltage of the current sharing bus 4 .

Optionally, in this embodiment, the switching device 5 is a fully-controlled switch, and the fully-controlled switch includes a control terminal, a high-voltage terminal, and a low-voltage terminal, and the control terminal of the switching device 5 is connected to the control terminal. The output port of the circuit 31 is connected, the low voltage terminal of the switching device 5 is connected to the ground wire, and the high voltage terminal of the switching device 5 is connected to the current sharing bus bar 4 .

Taking the N-channel enhancement mode MOSFET as an example, the control terminal of the N-channel MOSFET is grounded, and the high-voltage terminal and the low-voltage terminal are respectively connected to the current sharing bus 4 and the ground wire respectively.

Optionally, in this embodiment, a sampling circuit 32 is further included, and the sampling circuit 32 is connected between the input port of the controller and the current sharing bus 4 . The sampling circuit 32 is configured to collect the voltage value on the current sharing bus 4 and generate a voltage signal according to the voltage value, and send the voltage signal to the control circuit 31 through the input port.

The sampling circuit 32 may be the sampling circuit 32 in the prior art.

Optionally, in this embodiment, each power supply module 3 may further be provided with a selection button. The selection button is connected with the controller, so that the power-on command can be obtained through the state of the selection button.

Referring to FIG. 5 , FIG. 5 is a flowchart of a method for controlling a power supply device provided by an embodiment of the present application. The method can be applied to the above-mentioned power supply device, and the method includes steps S110 to S140 .

Step S110 , for each control circuit 31 , when the control circuit 31 is initialized, the switching device 5 is controlled to be turned on to ground the current sharing bus 4 , wherein the initialization of the power supply module 3 includes configuring the power supply module 3 ports and registers.

The ports include input ports and output ports.

In step S120 , after the power supply module 3 is started up, the switching device 5 is controlled to be turned off to release the grounding of the current sharing bus 4 .

Step S130, judging whether the voltage of the current sharing bus 4 is lower than the preset voltage.

Step S140, if the voltage of the current sharing bus 4 is greater than or equal to the preset voltage, the power module 3 is controlled to output electric energy.

Optionally, in this embodiment, before the step S130, it further includes a step of judging whether a power-on command is detected, wherein the power-on command is used to control whether to allow the power supply module 3 to output power.

The step of judging whether the voltage of the current sharing bus 4 is less than the preset voltage includes, if the power-on command is detected, determining whether the voltage of the current sharing bus 4 is less than the preset voltage.

In this embodiment, before the switch command is detected, the user can manually operate the control structure of each module, so as to realize the selection of the control module used for operation in the power supply device. For example, the control structure is a button connected to the control module. When the power supply device is powered on, and the button is pressed once, the control circuit 31 can obtain the signal corresponding to the operation and consider that the power-on command has been obtained, that is, In other words, when detecting whether there is a switch command, it can be based on whether there is a signal corresponding to the key pressing operation.

Referring to FIG. 6, in this embodiment, before the step S120, the method further includes steps S210 and S220.

Step S210 , acquiring the running state parameters of the power module 3 .

Step S220, starting the power supply module 3 according to the operating state parameter.

The operating state parameter is data representing the operating state of the power supply module 3 , and the operating state parameter includes the input voltage, output voltage, output current and temperature of the power supply module 3 .

Optionally, in this embodiment, step S220 specifically includes judging whether the power module 3 is faulty according to the operating state parameter. If there is no fault in the power supply module 3, the power supply module 3 is started up.

In this embodiment, in step S120, after the power supply module 3 is started up, the switching device 5 is controlled to be disconnected to release the grounding of the current sharing bus 4, it is possible to detect whether the operating state parameters of the power supply module satisfy the Preset conditions are required to determine whether the power supply module 3 has been started up. If the running state parameters meet the preset conditions after the running state parameters are detected, then the switching device 5 can be controlled to be disconnected to make the current sharing bus 4 Release the ground.

This embodiment is used to determine the fault state of the power supply module 3 to ensure that the power supply module 3 can work stably.

Optionally, in this embodiment, judging whether the power supply module 3 has a fault according to the operating state parameter includes judging whether the input voltage, output voltage, output current and temperature meet preset conditions.

Specifically, it is determined whether the input voltage is within a first preset voltage range, the output voltage is within a second preset voltage range, the output current is within a preset current range, and the temperature is lower than a preset voltage range. Set the temperature.

If the input voltage is within the first preset voltage range, the output voltage is within the second preset voltage range, the output current is within the preset current range, and the temperature is less than the preset voltage range If the temperature is set, the power module 3 has no fault.

This embodiment is used to judge the operation of the power module 3 according to the overvoltage and undervoltage of the input voltage, the overvoltage and undervoltage of the output voltage, the overcurrent of the output current and the temperature of the power module 3 . state.

Referring to FIG. 7 , step S140 includes steps S141-S142.

Step S141 , calculating a duty cycle according to the input voltage and the output voltage of the power module 3 .

Step S142, controlling the power module 3 to output an output voltage consistent with the duty cycle.

Optionally, the formula for calculating the duty cycle is:

Duty=k*Vo/Vin

Wherein, Duty is the duty ratio, k is the ratio of the primary winding to the secondary winding of the transformer in the power module 3 , Vo is the output voltage of the power module 3 , and Vin is the input voltage of the power module 3 .

Referring to FIG. 8 , optionally, in this embodiment, after step S140 , the method further includes steps S150 to S170 .

Step S150 , after any power supply module 3 determines that there is a shutdown command, if there is a shutdown command, the switching device 5 is controlled to be turned on to ground the low current sharing bus 4 .

Step S160 , for each control circuit 31 , the magnitude of the voltage of the current sharing bus 4 is detected.

Step S170, when the voltage of the current sharing bus 4 is less than a preset voltage, the power module 3 is controlled to stop outputting electric energy.

That is, if it is detected that the voltage of the current sharing bus 4 is lower than the preset voltage, the power module 3 is controlled to stop outputting the voltage.

The shutdown instruction is an instruction for controlling the control circuit 31 of the power supply device to stop outputting power.

This embodiment is used to realize synchronous control of each power supply module 3 to stop supplying output voltage to the load when it is necessary to stop supplying power to the load after the power supply device supplies power to the load.

To sum up, in the embodiment of the present application, by adding a switching device that can control the voltage of the current sharing bus to the power module in the power supply equipment, firstly, the current sharing bus is grounded by controlling the switching device, and then the switch is controlled. The device releases the grounding of the current sharing bus, and simultaneously starts the power module to output electric energy when the current sharing bus is released from the ground. When the current-sharing bus is released from the ground, the voltage value on the current-sharing bus increases, and the control circuits of each power module can acquire the increased voltage on the current-sharing bus at almost the same time, and according to the increased voltage on the current-sharing bus The output voltage of the power supply modules is controlled. Therefore, in this embodiment, each power supply module can start to output power at the same time, even if the power supply modules output power at the same time. In addition, in the embodiment of the present application, since the obtained voltage of the current sharing bus is directly used to control the output voltage of the power supply module, that is, the current sharing bus and the synchronous bus are multiplexed, the structure of the power supply device can be simplified, and the power supply module can be It can synchronize the output and improve the control efficiency at the same time.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (10)

1. A method for controlling a power supply device, wherein the power supply device comprises a plurality of power supply modules, and each of the power supply modules comprises a control circuit and a switching device, and the switching device is connected between a current sharing bus and a ground wire , the control circuit is used to control the on-off of the switching device, a preset voltage is set on the current sharing bus, and the method includes: For each control circuit, when the control circuit is initialized, the switching device is controlled to be turned on to ground the current sharing bus, wherein the power module initialization includes configuring ports and registers of the power module; After the startup of the power supply module is completed, the switching device is controlled to be disconnected to release the grounding of the current sharing bus; Detecting whether the voltage of the current sharing bus is less than the preset voltage; When the voltage of the current sharing bus is greater than or equal to the preset voltage, the power module is controlled to output electric energy. 2 . The power supply device control method according to claim 1 , wherein before judging whether the voltage of the current sharing bus is less than the preset voltage, the method further comprises the steps of: determining whether a power-on command is detected, wherein the power-on command is used to control whether to allow the power supply module to output power; The step of judging whether the voltage of the current sharing bus is less than the preset voltage includes: If the power-on command is detected, it is determined whether the voltage of the current sharing bus is less than the preset voltage. 3 . The power supply device control method according to claim 1 , wherein, after the power module is started up, before the step of controlling the switching device to be disconnected to release the grounding of the current sharing bus, the method 3 . Also includes: obtaining the operating state parameters of the power module; Start the power module according to the operating state parameter; Wherein, the operating state parameter is data representing the operating state of the power supply module, and the operating state parameter includes the input voltage, output voltage, output current and temperature of the power supply module. 4. The power supply device control method according to claim 3, wherein the step of starting the power supply module according to the operating state parameter comprises: Determine whether the power module is faulty according to the operating state parameter; If there is no fault in the power supply module, the startup of the power supply module is completed. 5. The power supply device control method according to claim 4, wherein the step of judging whether the power supply module has a fault according to the operating state parameter comprises: Determine whether the input voltage is within a first preset voltage range, whether the output voltage is within a second preset voltage range, whether the output current is within a preset current range, and whether the temperature is lower than a preset temperature; If the input voltage is within the first preset voltage range, the output voltage is within the second preset voltage range, the output current is within the preset current range, and the temperature is less than the preset voltage range If the temperature is set, there is no fault in the power module. 6. The power supply device control method according to any one of claims 3-5, wherein the step of controlling the power supply module to output electrical energy comprises: calculating a duty cycle according to the input voltage and the output voltage of the power module; The power module is controlled to output an output voltage consistent with the duty cycle. 7. The power supply device control method according to claim 6, wherein after the step of controlling the power supply module to output electric energy, the method further comprises: In any power module, it is judged whether there is a shutdown command, and if there is a shutdown command, the switching device is controlled to be turned on to ground the current sharing bus; For each control circuit, detect the voltage of the current sharing bus; If the voltage of the current sharing bus is less than the preset voltage, controlling the power module to stop outputting electric energy; Wherein, the shutdown instruction is an instruction for controlling the control circuit of the power supply device to stop outputting electrical energy. 8. A power supply device utilizing the control method according to any one of claims 1 to 7, wherein the power supply device comprises a plurality of power supply modules, each of the power supply modules comprises a control circuit and a switching device, wherein the The switching device is connected between the current sharing bus and the ground wire, the control circuit is used to control the on-off of the switching device, and a preset voltage is set on the current sharing bus. 9 . The power supply device according to claim 8 , wherein an initial state of the switching device is an off state, and the initial state is a state before the startup of the power module is completed. 10 . 10. The power supply device according to claim 8 or 9, wherein the switching device is a fully controlled switch, the fully controlled switch comprises a control terminal, a high voltage terminal and a low voltage terminal, and the switching device The control terminal of the switch device is connected to the output port of the control circuit, the low voltage terminal of the switch device is connected to the ground wire, and the high voltage terminal of the switch device is connected to the current sharing bus.

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