Power supply circuit and control method thereof

Abstract

The invention relates to a power supply circuit and a control method of the power supply circuit, and the power supply circuit comprises a power module which is connected to two ends of a load and is used for supplying power to the load; the power supply module comprises a plurality of power supply assemblies which are sequentially connected in series; each power supply assembly comprises a direct-current power supply and a secondary controller, the secondary controller and the direct-current power supply are connected in series in the power supply assembly, and the secondary controller is used for controlling the on-off of the direct-current power supply corresponding to the secondary controller in the power supply assembly based on the on-off of the secondary controller; the power supply circuit further comprises a first-stage controller, the first-stage controller is connected with the second-stage controller, and the first-stage controller is used for controlling on-off of the second-stage controller and controlling the duty ratio of a target power supply assembly in the multiple power supply assemblies. In conclusion, voltage and / or current are / is output to the load in a mode of adjusting the duty ratio, the output voltage and / or the output current are / is kept in a more stable interval, and compared with a thyristor control scheme, the scheme is more accurate and flexible, and the overall efficiency is higher.

Description

Technical Field

[0001] The present application relates to the technical field of power supply equipment, and in particular to a power supply circuit and a control method of the power supply circuit. Background Art

[0002] High voltage and high current power supply technology is crucial for large experimental devices, such as magnetic confinement fusion experimental devices and strong magnetic field experimental devices. These devices require extremely high voltage and current to generate and maintain plasma, as well as to generate ultra-strong magnetic fields. Their power supply systems require special designs and technologies to ensure that they can provide stable and controllable high voltage and high current.

[0003] Traditional solutions generally use an AC pulse generator set plus a high-power thyristor converter. On the one hand, during the power supply process of the AC pulse generator set, changes in the generator speed will cause changes in the output voltage frequency, which poses a challenge to the frequency synchronization of the synchronization signal and thus affects the control accuracy. On the other hand, the conduction and shutdown of the thyristor involve the characteristics of the device itself and various factors of the external circuit environment. The thyristor requires sufficient trigger current or voltage to turn on, and even if the trigger signal is removed, as long as the anode current remains above a certain level, the thyristor will continue to remain in the on state, affecting the control accuracy and efficiency. Summary of the invention

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a power supply circuit and a control method of the power supply circuit.

[0005] In a first aspect, the present application provides a power supply circuit, comprising:

[0006] A power supply module, the power supply module is connected to both ends of the load and is used to supply power to the load;

[0007] The power module includes a plurality of power components connected in series;

[0008] Each of the power supply components includes a DC power supply and a secondary controller, wherein the secondary controller is connected in series with the DC power supply in the power supply component, and the secondary controller is used to control the on / off of the DC power supply corresponding to it in the power supply component based on its own on / off control;

[0009] The power supply circuit also includes a primary controller, which is connected to the secondary controller and is used to control the on and off of the secondary controller and control the duty cycle of a target power supply component among the multiple power supply components.

[0010] Optionally, the number of the power modules is greater than or equal to 1;

[0011] When the number of the power modules is greater than or equal to 2, the multiple power modules are connected in parallel.

[0012] Optionally, the power supply component includes a type of component; the DC power supply includes a type of power supply;

[0013] The type of components also includes a first diode and a second diode;

[0014] The positive electrode of the first diode in the type of component is connected to the positive electrode of the type of power supply, the negative electrode of the first diode is connected to the first end of the secondary controller, the second end of the secondary controller and the negative electrode of the second diode are both connected to the negative electrode of the power supply component of the next level adjacent thereto, and the positive electrode of the second diode and the negative electrode of the type of power supply are both connected to the positive electrode of the power supply component of the previous level adjacent thereto.

[0015] Optionally, the power supply component further includes a second type of component; the DC power supply further includes a second type of power supply;

[0016] The second type of components also includes a third diode, a fourth diode and a first resistor;

[0017] The positive electrode of the third diode in the second type component is connected to the positive electrode of the second type power supply, the negative electrode of the third diode is connected to the first end of the secondary controller, the second end of the secondary controller and the negative electrode of the fourth diode are both connected to the negative electrode of the next-level power supply component adjacent thereto, the positive electrode of the fourth diode is connected to the first end of the first resistor, the second end of the first resistor and the negative electrode of the second type power supply are both connected to the positive electrode of the previous-level power supply component adjacent thereto.

[0018] Optionally, the output voltage of the first type of power supply is greater than the output voltage of the second type of power supply.

[0019] Optionally, it further includes a first fuse, a first inductor and a first switch, wherein the first fuse and the first inductor are sequentially connected in series between the positive electrode of the power module and the load.

[0020] Optionally, the power supply circuit further includes a second resistor;

[0021] The second resistor is connected to both ends of the load and is connected in parallel with the power module.

[0022] Optionally, the power supply component also includes a power supply monitoring device, a second fuse and a second switch, the power supply monitoring device is connected to the first-level controller, and the second fuse and the second switch are connected in series in sequence between the negative pole of the DC power supply and the positive pole of the power supply component of the adjacent upper level.

[0023] In a second aspect, the present application further provides a control method for a power supply circuit, which is applied to the power supply circuit as described in any one of the first aspects; the method comprises:

[0024] Determine to output a target current to the load, and control the plurality of power components in the power module to be turned on in sequence;

[0025] Determining that the output current of the power supply circuit reaches the target current, and determining the target power supply component;

[0026] The duty cycle of the target power supply component is controlled so that the output current of the power supply circuit is maintained at the target current.

[0027] Optionally, controlling the plurality of power components in each power module to start up in sequence comprises:

[0028] Control the two types of components to start in sequence;

[0029] Determine that all of the two types of components are turned on, and control the components of the one type to be turned on in sequence.

[0030] Optionally, before controlling the duty cycle of the target power supply component, the method further includes:

[0031] determining at least one of the target power supply components in the category of components;

[0032] Non-target power supply components in the one type of components are controlled to be shut down in sequence.

[0033] Optionally, after controlling the duty cycle of the target power supply component, the method further includes:

[0034] Determine to stop outputting the target current to the load, and control the target power supply components to be turned off in sequence;

[0035] The two types of components are controlled to be closed in sequence.

[0036] The present application provides a power supply circuit and a control method for the power supply circuit, the power supply circuit comprising: a power supply module, the power supply module is connected to both ends of the load, and is used to supply power to the load; the power supply module comprises a plurality of power supply components connected in series in sequence; each power supply component comprises a DC power supply and a secondary controller, the secondary controller is connected in series with the DC power supply in the power supply component, and the secondary controller is used to control the on and off of the DC power supply corresponding to it in the power supply component based on its own on and off control; the power supply circuit also comprises a primary controller, the primary controller is connected to the secondary controller, and the primary controller is used to control the on and off of the secondary controller, and control the duty cycle of the target power supply component in the plurality of power supply components. Based on the above scheme, the present application can realize modular control based on multiple components relative to the power supply circuit realized by thyristors in the prior art scheme, and realizes a higher output current output to the load by controlling the on and off of the power supply component in the power supply module, and can keep the output current in a more stable range by adjusting the target secondary controller to adjust the duty cycle of the target power supply component, which is more accurate and flexible than the thyristor control scheme; in addition, since the present scheme directly adopts a DC power supply for power supply, there is no high-power transformer and rectification link, less reactive power and harmonics, and higher overall efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of a power supply circuit structure provided in an embodiment of the present application;

[0038] Figure 2 A schematic diagram of a power supply assembly structure provided in an embodiment of the present application;

[0039] Figure 3 A schematic diagram of another power supply assembly structure provided in an embodiment of the present application;

[0040] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0042] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present application, rather than all of the embodiments.

[0043] A power supply circuit and a control method of the power supply circuit provided in an embodiment of the present application are exemplarily described below in conjunction with the accompanying drawings.

[0044] Figure 1 A schematic diagram of a power supply circuit structure provided in an embodiment of the present application includes:

[0045] The power supply module 100 is connected to both ends of the load 000 and is used to supply power to the load 000 .

[0046] The power module 100 includes a plurality of power components 101 connected in series.

[0047] Each power supply component 101 includes a DC power supply and a secondary controller. The secondary controller is connected in series with the DC power supply in the power supply component 101. The secondary controller is used to control the on / off of the corresponding DC power supply in the power supply component 101 based on its own on / off control.

[0048] The power supply circuit also includes a primary controller, which is connected to the secondary controller. The primary controller is used to control the on and off of the secondary controller and control the duty cycle of a target power component among the multiple power components.

[0049] like Figure 1 As shown, the load 000 in the embodiment of the present application may represent an electrical device such as a strong magnetic field experimental device that requires a power supply circuit to provide high voltage and high current, and it may be an inductive device.

[0050] In order to achieve high voltage and high current power supply to the load 000, the embodiment of the present application has multiple identical and / or different power supply components 101 connected in series in the power supply module 100. Each power supply component 101 can be regarded as a separate power supply that can supply power to the outside. Therefore, after connecting multiple power supply components 101 in series, the output voltage of the power supply module 100 can be increased. In the process of supplying power to the load 000, due to the high output voltage, the output current can be increased as soon as possible to reach the target current level, thereby improving the power supply level of the power supply circuit.

[0051] The primary controller in the embodiment of the present application is a control device for controlling the secondary controller, which can be any device capable of realizing logic control functions, such as MCU. The secondary controller in the embodiment of the present application is a functional device for realizing the switching of the corresponding DC power supply in the power supply component 101, which can be an IGBT (insulated gate bipolar transistor). The adjustment speed of the IGBT is relatively fast, and efficient and high-frequency control of the power supply circuit can be realized.

[0052] Based on the above scheme, compared with the power supply circuit realized by thyristors in the prior art scheme, the present application can realize modular control based on multiple components, and output high voltage and high current to the load 000 by controlling the on and off of each power supply component 101 in the power supply module 100. By adjusting the target secondary controller and thus adjusting the duty cycle of the target power supply component, the output voltage and / or output current can be kept in a more stable range, which is more precise and flexible than the thyristor control scheme. In addition, since the present scheme directly adopts DC power supply, there is no high-power transformer and rectification link, there is less reactive power and harmonics, and the overall efficiency is higher.

[0053] Continue reading Figure 1 In some embodiments, the number of the power modules 100 is greater than or equal to 1. When the number of the power modules 100 is greater than or equal to 2, multiple power modules 100 are connected in parallel.

[0054] like Figure 1 As shown, the embodiment of the present application takes into account that the output current of a single power module 100 may not meet the needs of the load 000, so multiple parallel power modules 100 can be set. Without considering other factors, when the output current of each power module 100 remains unchanged, the power supply circuit formed by multiple power modules 100 can output a larger output current, further improving the output current capacity of the power supply circuit.

[0055] Figure 2 A schematic diagram of a power supply assembly structure provided in an embodiment of the present application. In some embodiments, the power supply assembly 101 includes a type of assembly. The DC power supply 102 includes a type of power supply 104.

[0056] One type of components also includes a first diode 105 and a second diode 106 .

[0057] The positive electrode of the first diode 105 in a type of component is connected to the positive electrode of a type of power supply 104, the negative electrode of the first diode 105 is connected to the first end of the secondary controller 103, the second end of the secondary controller 103 and the negative electrode of the second diode 106 are both connected to the negative electrode of the adjacent next-level power supply component, and the positive electrode of the second diode 106 and the negative electrode of the type of power supply 104 are both connected to the positive electrode of the adjacent previous-level power supply component.

[0058] Special explanation is made here. In the embodiments of the present application, it is generally described that A includes B, which means that B is a component of A. However, in the above embodiments, the power supply component 101 includes a type of component, which means that the type of component is a category of the power supply component 101, which is the power supply component 101, not a component of the power supply component 101; the DC power supply 102 in the above embodiments includes a type of power supply 104. The same is true for the following embodiments, such as the power supply component 101 also includes a type of component, and the DC power supply 102 also includes a type of power supply 107.

[0059] like Figure 2 As shown, when the secondary controller 103 is in the disconnected state, the type-one power source 104 cannot actually act as a power source in the power source component 101. In this state, the power source component 101 only acts as a path, and the current of the upper power source component connected to the power source component 101 flows directly to the lower power source component connected to the power source component 101 after passing through the second diode 106.

[0060] When the secondary controller 103 is in the on state, the first type of power supply 104 can function as a power supply. In this state, it can be simply considered that the first type of power supply 104 is connected in series to the circuit of the upper and lower power supply components 101 connected to the power supply component 101. When multiple power supply components 101 are connected in series, the output voltage of the corresponding power supply module 100 can be increased, which is conducive to quickly increasing the output current during the power supply process. After the first diode 105 stops supplying power to the load 000, the charge in the inductive load 000 can flow back and damage the first type of power supply 104.

[0061] Figure 3 This is another schematic diagram of a power supply assembly structure provided in an embodiment of the present application. In some embodiments, the power supply assembly 101 further includes a second type of assembly. The DC power supply 102 further includes a second type of power supply 107.

[0062] The second type of components further includes a third diode 108 , a fourth diode 109 and a first resistor 110 .

[0063] The positive electrode of the third diode 108 in the second-class component is connected to the positive electrode of the second-class power supply 107, the negative electrode of the third diode 108 is connected to the first end of the secondary controller 103, the second end of the secondary controller 103 and the negative electrode of the fourth diode 109 are both connected to the negative electrode of the next-level power supply component adjacent thereto, the positive electrode of the fourth diode 109 is connected to the first end of the first resistor 110, the second end of the first resistor 110 and the negative electrode of the second-class power supply 107 are both connected to the positive electrode of the previous-level power supply component adjacent thereto.

[0064] The power module 100 in the embodiment of the present application may also include a second type of component, that is, the power module 100 is composed of a plurality of power components 101 connected in series, and among the plurality of power components 101, a portion may be a first type of component and another portion may be a second type of component. The DC power supply 102 in the first type of component is a first type of power supply 104, and the DC power supply 102 in the second type of component is a second type of power supply 107.

[0065] like Figure 3 As shown, when the secondary controller 103 is in the disconnected state, the second-class power supply 107 cannot actually act as a power source in the power supply component 101. In this state, the power supply component 101 only acts as a path, and the current of the upper-level power supply component connected to the power supply component 101 flows directly to the next-level power supply component connected to the power supply component 101 after passing through the fourth diode 109.

[0066] When the secondary controller 103 is in the on state, the Class II power supply 107 can function as a power supply. In this state, it can be simply considered that the Class II power supply 107 is connected in series to the circuit of the upper and lower power supply components 101 connected to the power supply component 101. When multiple power supply components 101 are connected in series, the output voltage of the corresponding power supply module 100 can be increased, which is conducive to quickly increasing the output current during the power supply process. After the third diode 108 stops supplying power to the load 000, the charge in the inductive load 000 can flow back and damage the Class II power supply 107.

[0067] With the above Figure 2 The difference between the power supply component 101 in the form of a type I component is that the type II component also includes a first resistor 110, and the first resistor 110 can act as an energy dissipation resistor. After stopping supplying power to the load 000, some energy still exists in the inductive load 000, and the energy dissipation resistor can absorb the residual energy in the load 000.

[0068] In some embodiments, the output voltage of the first type of power supply is greater than the output voltage of the second type of power supply.

[0069] In order to explain the embodiments of the present application more clearly, the following is exemplarily described with specific numerical values. For example, if a current of 200KA needs to be provided to the load, the embodiment of the present application can be composed of 10 power modules in parallel, and the output current of each power module is 2KA. Each power module can be composed of 2 Class I components and 2 Class II components in series. The output voltage of a Class I component can be 500V, which has a higher output voltage, and the output voltage of a Class II component can be 100V, which has a lower output voltage. Therefore, when a Class I component is connected to the power module, the power module can output a larger output voltage, thereby causing the output current to rapidly rise from 0 to the target current 200KA required by the load.

[0070] On the other hand, in the application scenario corresponding to the embodiment of the present application, although the focus is on the output current that the power supply circuit can provide to the load, rather than the output voltage, the output voltage of the power supply circuit also needs to be maintained within a certain reasonable range, and should not be too high or too low. Setting a certain number of a class of power supplies can make the output voltage of the power module reach an ideal range when the overall number of power supply components is small, thereby reducing the number of power supply components. On the other hand, it is mentioned in the above embodiment that the primary controller can also adjust the duty cycle of the target power supply component by adjusting the target secondary controller, which is essentially to adjust the duty cycle of the DC power supply (such as a class of power supply) corresponding to the target secondary controller, and the output current of the power supply circuit is kept stable by adjusting the duty cycle. After setting a class of power supplies with a larger output voltage, the output voltage of the power supply circuit can be adjusted in a larger range by adjusting the duty cycle of the target power supply component corresponding to a class of power supplies, thereby achieving a more powerful adjustment of the output current.

[0071] From another perspective, by setting a second type of power supply with a smaller output voltage, the output voltage of the power supply circuit can be kept within the ideal range more easily. On the contrary, if the ideal range of the output voltage of the power supply circuit is narrow, and all power supply components use a type of component, and the output voltage of the type of power supply is higher, it is not easy to keep the output voltage of the power supply circuit within the ideal range.

[0072] Continuing to refer to 1, in some embodiments, it further includes a first fuse 111, a first inductor 112 and a first switch 113, and the first fuse 111 and the first inductor 112 are sequentially connected in series between the positive electrode of the power module 100 and the load 000.

[0073] like Figure 1 As shown, the power supply circuit may also include a first fuse 111, and each (strip) power module 100 is connected to a first fuse 111 in the main path corresponding to the power module 100. The first fuse 111 corresponding to each power module 100 may automatically blow when the current in the power module 100 is too large, thereby avoiding damage to the entire power supply circuit. The first inductor 112 may play a role in current balancing, thereby avoiding excessive fluctuations in the output current of the corresponding power module 100. The first switch 113 may disconnect the connection between the power supply circuit and the load 000 after completely stopping the power supply to the load 000.

[0074] Continue reading Figure 1 In some implementations, the power supply circuit further includes a second resistor 114 .

[0075] The second resistor 114 is connected to both ends of the load 000 and is connected in parallel with the power module 100 .

[0076] like Figure 1 As shown, the second resistor 114 may be a varistor, which can absorb the peak overvoltage.

[0077] Continue reading Figure 2 or Figure 3 In some embodiments, the power supply component 101 also includes a power supply monitoring device 115, a second fuse 116 and a second switch 117. The power supply monitoring device 115 is connected to the primary controller, and the second fuse 116 and the second switch 117 are connected in series between the negative pole of the DC power supply 102 and the positive pole of the adjacent upper-level power supply component 101.

[0078] like Figure 2 or Figure 3 As shown, the power supply monitoring device 115 represents a device that can monitor the DC power supply 102 connected thereto, for example, the voltage, current, remaining power, etc. of the DC power supply 102 can be monitored. When the DC power supply 102 is detected to be abnormal, a signal can be sent to the primary controller, and the primary controller can control the secondary controller 103 corresponding to the DC power supply 102 to be disconnected in time to avoid the abnormal DC power supply 102 from affecting the entire power supply circuit. The second fuse 116 has a similar function to the first fuse 111, and can automatically blow when the output current of the DC power supply 102 corresponding thereto is too large, or when the secondary controller 103 corresponding thereto is damaged, to avoid affecting the entire power supply circuit. After stopping the power supply to the load 000, the DC power supply 102 corresponding thereto can be controlled by the second switch 117 to completely disconnect the DC power supply 102, which is convenient for inspection and maintenance, and can also avoid the DC power supply 102 from being in a discharge state all the time.

[0079] The present application also provides a control method for a power supply circuit, which is applied to any power supply circuit in the above power supply circuit embodiments. The method includes:

[0080] Determine the target current to be output to the load, and control multiple power components in the power module to turn on in sequence.

[0081] Determine that the output current of the power supply circuit reaches the target current and determine the target power supply components.

[0082] The duty cycle of the target power supply component is controlled so that the output current of the power supply circuit is maintained at the target current.

[0083] Specifically, taking only one power module as an example, the process of supplying power to the load includes two processes, namely, the current climbing stage and the current flat-top stage. During the current climbing stage, the output current rises rapidly, and during the current flat-top stage, the output current reaches the target current and the output current approaches a stable state.

[0084] After determining the target current to be output to the load, multiple power components in the power module can be controlled to be turned on in sequence. After all the power components are turned on, the output voltage of the power module is higher, so the output current can be increased rapidly.

[0085] In the process of reaching the current flat-top stage, only the duty cycle of the target power component can be controlled to keep the output current at the target current, for example, the power component can be controlled by PWM (Pulse Width Modulation). In some scenarios, if high voltage is no longer needed to maintain a high current climbing rate, some power components can be turned off to reduce the power consumption of some power components.

[0086] In some embodiments, controlling multiple power components in each power module to start up in sequence includes:

[0087] Control the two types of components to start in sequence.

[0088] Make sure all the second-category components are turned on, and control the first-category components to be turned on in sequence.

[0089] Specifically, for example, each power module is composed of 2 first-class components and 2 second-class components connected in series, and the second-class components can be controlled to be turned on in sequence first. Since the first resistor (voltage relief resistor) is connected to the circuit corresponding to the second-class component, if the second-class component is turned on with a time lag, the first resistor will consume electrical energy and act as a voltage divider, so the second-class components can be turned on in sequence first. After all the second-class components are turned on, the first-class components are turned on in sequence, so that the output voltage of the power module is higher, and the output current can rise rapidly.

[0090] In some implementations, before controlling the duty cycle of the target power component, the method further includes:

[0091] At least one target power component in a class of components is identified.

[0092] Control non-target power components in a category of components to be shut down in sequence.

[0093] After the output current reaches the current plateau stage, if the main concern is the output current rather than the output voltage, it is unnecessary to open too many power components, and some Class I components can be turned off. That is, at least one target power component is determined, and the target power component is a Class I component, and other power components that are not determined as target power components are non-target power components and can be turned off in turn.

[0094] Since the first resistor is provided in the second type of component and a certain output voltage still needs to be maintained, the second type of resistor can remain in the open state. Since the output voltage in the first type of component is relatively high, voltage regulation in a larger range can be achieved based on the PWM control method, so the duty cycle of the target power supply component can be controlled. Since the power supply circuit is provided with a first inductor in the path corresponding to each power module, the output current basically does not fluctuate due to the action difference of the secondary controller within a smaller time range (for example, 1us). For example, when the output current is 200KA, the power supply circuit is composed of 100 power modules in parallel. When adjusted at a frequency of 100Hz, the overall current fluctuation can be controlled within 1KA.

[0095] In the embodiment of the above power supply circuit, there is also the problem of possible damage to the power supply component. In this regard, in the embodiment of the present application, in the process of adjusting the duty cycle of the target power supply component, if the target power supply component is damaged, the first-level controller can immediately shut down the target second-level controller of the target power supply component, and at the same time use another first-class component as the target power supply component and its corresponding second-level controller as the target second-level controller, and adjust the duty cycle of the target power supply component by adjusting the target second-level controller to achieve the purpose of stable output current.

[0096] In some embodiments, the method further comprises:

[0097] It is determined to stop outputting the target current to the load, and the target power supply component is controlled to be turned off.

[0098] Control the second type of components to shut down one by one.

[0099] Specifically, after it is determined to stop outputting the target current to the load, the first type of component (i.e., the target power supply component) can be controlled to be turned off first. Since the first resistor is provided in the second type of component, the second type of component is turned off with a lag, and after the first type of component is turned off, the second type of component is turned off in sequence. After the second type of component is turned off, it is equivalent to connecting the first resistor in series to the power supply circuit, which can serve the purpose of consuming the residual charge in the inductive load.

[0100] An embodiment of the present application also provides a computer-readable storage medium, which stores a program or instruction, and the program or instruction enables a computer to execute the steps of any method provided in the above implementation.

[0101] In some embodiments, the computer executable instructions, when executed by a computer processor, can also be used to execute the technical solution of the above method provided in the embodiments of the present application to achieve corresponding beneficial effects.

[0102] An embodiment of the present application also provides an electronic device, including: a processor and a memory; the processor calls a program or instruction stored in the memory to execute the steps of any method provided in the above implementation to achieve corresponding beneficial effects.

[0103] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 4 As shown, the electronic device includes one or more processors 401 and a memory 402 .

[0104] The processor 401 may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device to perform desired functions.

[0105] The memory 402 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, a random access memory (RAM) and / or a cache memory (cache), etc. The non-volatile memory may include, for example, a read-only memory (ROM), a hard disk, a flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 401 may run the program instructions to implement the method of the embodiment of the present application described above, and / or other desired functions. Various contents such as input signals, signal components, noise components, etc. may also be stored in the computer-readable storage medium.

[0106] In one example, the electronic device may further include: an input device 403 and an output device 404, and these components are interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0107] In addition, the input device 403 may also include, for example, a keyboard, a mouse, and the like.

[0108] The output device 404 can output various information to the outside, including the determined distance information, direction information, etc. The output device 404 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto, and the like.

[0109] Of course, to simplify, Figure 4 Only some of the components in the electronic device related to the present application are shown, and components such as a bus, an input / output interface, etc. are omitted. In addition, the electronic device may further include any other appropriate components according to specific application conditions.

[0110] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0111] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A power supply circuit, characterized in that: include: A power supply module, the power supply module is connected to both ends of the load and is used to supply power to the load; The power module includes a plurality of power components connected in series; Each of the power supply components includes a DC power supply and a secondary controller, wherein the secondary controller is connected in series with the DC power supply in the power supply component, and the secondary controller is used to control the on / off of the DC power supply corresponding to it in the power supply component based on its own on / off control; The power supply circuit also includes a primary controller, which is connected to the secondary controller and is used to control the on and off of the secondary controller and control the duty cycle of a target power supply component among the multiple power supply components.

2. The power supply circuit according to claim 1, characterized in that: The number of the power modules is greater than or equal to 1; When the number of the power modules is greater than or equal to 2, the multiple power modules are connected in parallel.

3. The power supply circuit according to claim 1, characterized in that: The power supply assembly includes a type of assembly; the DC power supply includes a type of power supply; The type of components also includes a first diode and a second diode; The positive electrode of the first diode in the type of component is connected to the positive electrode of the type of power supply, the negative electrode of the first diode is connected to the first end of the secondary controller, the second end of the secondary controller and the negative electrode of the second diode are both connected to the negative electrode of the power supply component of the next level adjacent thereto, and the positive electrode of the second diode and the negative electrode of the type of power supply are both connected to the positive electrode of the power supply component of the previous level adjacent thereto.

4. The power supply circuit according to claim 3, characterized in that: The power supply assembly also includes two types of components; the DC power supply also includes two types of power supplies; The second type of components also includes a third diode, a fourth diode and a first resistor; The positive electrode of the third diode in the second type component is connected to the positive electrode of the second type power supply, the negative electrode of the third diode is connected to the first end of the secondary controller, the second end of the secondary controller and the negative electrode of the fourth diode are both connected to the negative electrode of the next-level power supply component adjacent thereto, the positive electrode of the fourth diode is connected to the first end of the first resistor, the second end of the first resistor and the negative electrode of the second type power supply are both connected to the positive electrode of the previous-level power supply component adjacent thereto.

5. The power supply circuit according to claim 4, characterized in that: The output voltage of the first type of power supply is greater than the output voltage of the second type of power supply.

6. The power supply circuit according to claim 1, characterized in that: It also includes a first fuse, a first inductor and a first switch, wherein the first fuse and the first inductor are sequentially connected in series between the positive electrode of the power module and the load.

7. The power supply circuit according to claim 1, characterized in that: The power supply circuit also includes a second resistor; The second resistor is connected to both ends of the load and is connected in parallel with the power module.

8. The power supply circuit according to claim 1, characterized in that: The power supply component also includes a power supply monitoring device, a second fuse and a second switch. The power supply monitoring device is connected to the first-level controller, and the second fuse and the second switch are connected in series in sequence between the negative pole of the DC power supply and the positive pole of the power supply component of the upper level adjacent to it.

9. A method for controlling a power supply circuit, characterized in that: Applied to the power supply circuit according to any one of claims 1 to 8; the method comprises: Determine to output a target current to the load, and control the plurality of power components in the power module to be turned on in sequence; Determining that the output current of the power supply circuit reaches the target current, and determining the target power supply component; The duty cycle of the target power supply component is controlled so that the output current of the power supply circuit is maintained at the target current.

10. The method according to claim 9, characterized in that The controlling the plurality of power components in each power module to start up in sequence comprises: Control the two types of components to start in sequence; Determine that all of the two types of components are turned on, and control the components of the one type to be turned on in sequence.

11. The method according to claim 10, characterized in that Before controlling the duty cycle of the target power supply component, the method further includes: determining at least one of the target power supply components in the category of components; Non-target power supply components in the type of components are controlled to be shut down in sequence.

12. The method according to claim 11, characterized in that After controlling the duty cycle of the target power component, the method further includes: Determine to stop outputting the target current to the load, and control the target power supply components to be turned off in sequence; The two types of components are controlled to be closed in sequence.

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