Power supply circuit and power supply method

Abstract

The invention provides a power supply circuit and a power supply method, the power supply circuit comprises a plurality of power supply groups which are connected in parallel, each power supply group comprises a plurality of power supplies which are connected in series, and the power supplies comprise a main power supply and a plurality of subordinate power supplies; the main power supply is configured to collect power supply currents of the main power supply and the main power supplies of other power supply groups, and determine a first output voltage of the main power supply based on an average value of the power supply currents; the subordinate power supplies are configured to collect the power supply voltages of all the power supplies of the power pack where the subordinate power supplies are located, and determine the second output voltages of the subordinate power supplies of the power pack based on the average value of the power supply voltages. Through the mode, different power supply requirements can be met, the working efficiency of the power supply is improved, the circuit structure is simple, the output power of the power supply can be conveniently, quickly and effectively balanced, the reliability and stability of the power supply circuit are improved, and the production cost and the maintenance cost are reduced.

Description

Technical Field

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

[0002] The power supply can output a stable voltage or DC current and is widely used in the fields of power supply for electronic products, power supply for communication equipment, power supply for industrial equipment operation, charging of electric vehicles, etc.

[0003] In order to meet different power supply requirements and improve the working efficiency of the power supply, multiple power supplies need to be combined into a power supply circuit for power supply. A reliable and stable power supply circuit is crucial to the entire power system, and the existing power supply circuit still needs to be improved. Summary of the invention

[0004] The present application provides a power supply circuit and a power supply method, which can meet different power supply requirements and improve the working efficiency of the power supply. The circuit structure is simple and can conveniently, quickly and effectively balance the output power of the power supply, improve the reliability and stability of the power supply circuit, and help reduce production costs and maintenance costs.

[0005] In order to solve the above technical problems, the first aspect of the present application provides a power supply circuit.

[0006] The power supply circuit includes a plurality of power supply groups connected in parallel, each power supply group includes a plurality of power supply sources connected in series, including a main power supply source and a plurality of slave power supplies; The main power supply is configured to collect the power supply current of itself and the main power supply of other power supply groups, and determine the first output voltage of the main power supply based on the average value of the power supply current; the slave power supply is configured to collect the power supply voltages of all power supply sources in the power supply group to which it belongs, and determine the second output voltage of each slave power supply in the power supply group based on the average value of the power supply voltage.

[0007] Among them, the power supply circuit also includes a communication bus, and each power supply is connected to the communication bus respectively; wherein the main power supply obtains the power supply current value of the main power supply of other power supply groups through the communication bus; the slave power supply obtains the power supply voltage values ​​of all power supplies in its power supply group through the communication bus.

[0008] Among them, the main power supply obtains a first voltage control value according to the current error value between its own power supply current and the average value of the power supply current, and outputs a first output voltage according to the reference voltage value and the first voltage control value; the slave power supply obtains a second voltage control value according to the voltage error value between its own power supply current and the average value of the power supply current, and outputs a second output voltage according to the reference voltage value and the second voltage control value.

[0009] Among them, the power supply receives the communication address value, and determines the power group to which it belongs based on the communication address value and the total number of power groups; the power supply receives the communication address values ​​of all power supplies in the power group to which it belongs, determines the power supply with the smallest communication address value as the main power supply, and determines itself as the main power supply or the slave power supply.

[0010] The power supply circuit further includes a control module, and the control module is coupled to the power supply via a communication bus; the control module sends a control signal to the power supply via the communication bus, and the control signal includes a communication address value.

[0011] The control signal sent by the control module also includes a reference voltage value, wherein the reference voltage values ​​of the main power supply and the slave power supply are the same.

[0012] The power supply includes a dip switch, and the communication address value of the power supply is configured by the dip switch.

[0013] In order to solve the above technical problems, the second aspect of the present application provides a power supply method of a power supply circuit, wherein the power supply circuit includes a plurality of power supply groups connected in parallel, each power supply group includes a plurality of power supply sources connected in series, including a main power supply source and a plurality of slave power supplies; The power supply method includes: a main power supply collects power supply currents of itself and main power supplies of other power supply groups, and determines a first output voltage of the main power supply based on an average value of the power supply currents; a slave power supply collects power supply voltages of all power supply groups in which it is located, and determines a second output voltage of each slave power supply of the power supply group based on the average value of the power supply voltages.

[0014] Among them, the step of determining the first output voltage of the main power supply based on the average value of the power supply current includes: the main power supply obtains a first voltage control value according to a current error value between its own power supply current and the average value of the power supply current, and outputs a first output voltage according to a reference voltage value and the first voltage control value; the step of determining the second output voltage of each slave power supply of the power supply group based on the average value of the power supply voltage includes: the slave power supply obtains a second voltage control value according to a voltage error value between its own power supply voltage and the average value of the power supply voltage, and outputs a second output voltage according to the reference voltage value and the second voltage control value.

[0015] The power supply method includes: before the main power supply collects the power supply current of itself and the main power supply of other power supply groups: the power supply receives a communication address value; according to the communication address value, the total number of power supply groups is modulo to obtain the group number, and the power supply group to which it belongs is determined; the power supply receives the communication address values ​​of all power supplies in the power supply group to which it belongs, determines that the power supply with the smallest communication address value is the main power supply, and determines itself as the main power supply or the slave power supply.

[0016] Different from the prior art, the power supply circuit and power supply method provided by the present application form a parallel-series hybrid circuit structure, which can not only improve the power level of the power supply circuit, but also improve the voltage level of the power supply circuit, can meet different power supply requirements, and improve the working efficiency of the power supply. The circuit structure is simple, and the output power of the power supply can be easily, quickly and effectively balanced to ensure that the load of the power supply is relatively balanced. It can better withstand high current and voltage working environments, improve the reliability and stability of the power supply circuit, and help reduce production costs and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a circuit structure schematic diagram of an implementation mode of a power supply circuit of the present application; Figure 2 is a schematic diagram of a communication structure of another embodiment of the power supply circuit of the present application; Figure 3 is a schematic diagram of a power supply structure of another embodiment of the power supply circuit of the present application; Figure 4 It is a circuit structure schematic diagram of another implementation mode of the power supply circuit of the present application; Figure 5 It is a flow chart of an implementation method of a power supply method of a power supply circuit of the present application; Figure 6 It is a flow chart of another embodiment of the power supply method of the power supply circuit of the present application; Figure 7 It is a flow chart of another embodiment of the power supply method of the power supply circuit of the present application; Figure 8 yes Figure 7 A schematic diagram of a master power supply and a slave power supply allocation process of another embodiment of a power supply method for a power supply circuit of the present application. DETAILED DESCRIPTION

[0018] The scheme of the embodiment of the present application is described in detail below in conjunction with the drawings of the specification.

[0019] Figure 1 , Figure 2 , Figure 3 , Figure 4 The schematic diagram of the power circuit structure in the figure is a schematic diagram of circuit logic or communication logic, and the specific connection structure is based on the actual production structure. In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structure, interface, technology, etc. are proposed to facilitate a thorough understanding of the present application.

[0020] The present application first provides a power supply circuit, wherein the power supply circuit of the present application forms a parallel-series mixed circuit structure, which can not only improve the power level of the power supply circuit, but also improve the voltage level of the power supply circuit, and can meet application scenarios with different voltage and current requirements.

[0021] See also Figure 1 , Figure 1 It is a circuit structure diagram of an implementation method of a power supply circuit.

[0022] The power supply circuit 100 includes a plurality of power supply groups 101 connected in parallel, each power supply group 101 includes a plurality of power supply sources 102 connected in series, including a main power supply 1021 and a plurality of slave power supplies 1022; In the present application, the power supply groups 101 of the power supply circuit 100 are connected to the power supply bus 1011 through an air switch or a junction box (not shown) to achieve mutual parallel connection, and the power supply 102 of each power supply group 101 that is closest to the power supply bus 1011 is configured as the main power supply 1021, and the difference between the power supply 102 being configured as the main power supply 1021 or the slave power supply 1022 is only due to the circuit connection relationship. The power supply 102 has different balanced adjustment schemes. It can be understood that when the power supply circuit 100 is working normally, the main power supply 1021 and the slave power supply 1022 are outputting voltage at the same time, and the output is also the same or similar power supply voltage that belongs to the working range.

[0023] The power supply circuit 100 can be provided with two or more power supply groups 101, for example, 2 groups, 3 groups, 4 groups, 5 groups, 8 groups, 9 groups or 10 groups; each power supply group 101 can be provided with two or more power supplies 102, for example, 2, 3, 4, 5, 8, 9 or 10. It is necessary to ensure that the total number of power supply groups 101 is equal to the number of power supplies 102 in one power supply group 101 to form a power matrix, to ensure that when each parallel power supply group 101 outputs a voltage, the power supplies 102 with the same number share the load, to ensure that the load of each power supply 102 is relatively balanced, and to increase the reliability and stability of the power supply circuit 100.

[0024] The power supply circuit 100 sets the output reference voltage value according to the application scenario or the working condition of the load. However, since the internal resistance and output voltage of each power supply 102 constituting the power supply circuit may be different, thereby affecting the load of the power supply, in order to prevent some power supplies 102 from overheating or being damaged due to excessive current, the power supplies 102 need to collect the supply voltage of other power supplies 102, continuously adjust their own supply voltage, and complete the overall balanced adjustment of the power supply circuit, thereby improving the reliability and life of the power supply circuit 100.

[0025] The power supply circuit 100 in this embodiment forms a parallel-series mixed circuit structure, and different balancing adjustments are required for the connection relationship between the power supplies 102. Current balancing control is performed between the power supply groups 101 connected in parallel, and voltage balancing control is performed between the power supplies 102 connected in series.

[0026] The main power supply 1021 is configured to collect the power supply current of itself and the main power supplies 1021 of other power supply groups 101 , and determine the first output voltage of the main power supply 1021 based on the average value of the power supply current.

[0027] In order to perform current balancing control between power supply groups 101 connected in parallel, each main power supply 1021 sums the supply current of itself and the main power supplies 1021 of other power supply groups 101, and then divides the sum by the total number of power supply groups 101 to obtain the average value of the supply current, and continuously adjusts the supply voltage output to the first output voltage based on the average value of the supply current.

[0028] The slave power supply 1022 is configured to collect the supply voltages of all the power supply sources 102 in the power supply group 101 where it is located, and determine the second output voltage of each slave power supply 1022 in the power supply group 101 based on the average value of the supply voltages.

[0029] In order to perform voltage balancing control between the power supplies 102 connected in series, each slave power supply 1022 sums the supply voltage of itself and the main power supply 1021 and the slave power supply 1022 of the power supply group 101, and then divides it by the total number of power supplies 102 in the power supply group 101 to obtain the average value of the supply voltage, and continuously adjusts the output power voltage to the second output voltage based on the average value of the supply voltage.

[0030] In a specific embodiment, the power supply circuit 100 also includes a communication bus (not shown), and each power supply 102 is respectively connected to the communication bus; wherein the main power supply 1021 obtains the power supply current value of the main power supply 1021 of other power supply groups 101 through the communication bus; the slave power supply 1022 obtains the power supply voltage values ​​of all power supplies 102 of the power supply group 101 to which it belongs through the communication bus.

[0031] Each power supply 102 sends its own power supply voltage value and / or power supply current value through the communication bus, and collects the voltage value and / or power supply current value of other power supplies 102, so as to react to the power supply circuit 100 as quickly as possible. Specifically, the power supply 102 sends the power supply voltage, power supply current and communication address value to the communication bus, and after receiving the information sent by other power supplies 102 and its own information, it caches them in the array of storage elements of the power supply 102 in descending order according to the communication address value, for balancing adjustment.

[0032] In other embodiments, each power supply 102 is connected to a measuring module, which collects the supply voltage and / or supply current of each power supply 102 through the measuring module, and then sends the supply voltage and / or supply current of each power supply 102 through the communication bus; or each power supply 102 is connected to a control module through the communication bus, and the control module uniformly collects the supply voltage value and / or supply current value of each power supply 102 sent by the power supply 102, integrates the values ​​and then uniformly sends them to each power supply 102, so as to timely monitor each power supply 102 of the power supply circuit 100.

[0033] See also Figure 2 , Figure 2 Schematic diagram of the communication structure of another embodiment of the power supply circuit of the present application. The circuit structure of another embodiment of the power supply circuit of the present application can be referred to Figure 1 A circuit structure diagram of an embodiment of the power supply circuit of the present application is provided to assist understanding.

[0034] The power supply circuit 100 includes a plurality of power supply groups 101 connected in parallel, each power supply group 101 includes a plurality of power supply sources 102 connected in series, including a main power supply 1021 and a plurality of slave power supplies 1022; In the present application, the power supply groups 101 of the power supply circuit 100 are connected to the power supply bus 1011 through an air switch or a junction box (not shown) to achieve mutual parallel connection, and the power supply 102 of each power supply group 101 that is closest to the power supply bus 1011 is configured as the main power supply 1021, and the difference between the power supply 102 being configured as the main power supply 1021 or the slave power supply 1022 is only due to the circuit connection relationship. The power supply 102 has different balanced adjustment schemes. It can be understood that when the power supply circuit 100 is working normally, the main power supply 1021 and the slave power supply 1022 are outputting voltage at the same time, and the output is also the same or similar power supply voltage that belongs to the working range.

[0035] The power supply circuit 100 can be provided with two or more power supply groups 101, for example, 2 groups, 3 groups, 4 groups, 5 groups, 8 groups, 9 groups or 10 groups; each power supply group 101 can be provided with two or more power supplies 102, for example, 2, 3, 4, 5, 8, 9 or 10. It is necessary to ensure that the total number of power supply groups 101 is equal to the number of power supplies 102 in one power supply group 101 to form a power matrix, to ensure that when each parallel power supply group 101 outputs a voltage, the power supplies 102 with the same number share the load, to ensure that the load of each power supply 102 is relatively balanced, and to increase the reliability and stability of the power supply circuit 100.

[0036] The power supply circuit 100 sets the output reference voltage value according to the application scenario or the working condition of the load. However, since the internal resistance and output voltage of each power supply 102 constituting the power supply circuit may be different, thereby affecting the load of the power supply, in order to prevent some power supplies 102 from overheating or being damaged due to excessive current, the power supplies 102 need to collect the supply voltage of other power supplies 102, continuously adjust their own supply voltage, and complete the overall balanced adjustment of the power supply circuit, thereby improving the reliability and life of the power supply circuit 100.

[0037] The power supply circuit 100 in this embodiment forms a parallel-series mixed circuit structure, and different balancing adjustments are required for the connection relationship between the power supplies 102. Current balancing control is performed between the power supply groups 101 connected in parallel, and voltage balancing control is performed between the power supplies 102 connected in series.

[0038] The main power supply 1021 is configured to collect the power supply current of itself and the main power supplies 1021 of other power supply groups 101 , and determine the first output voltage of the main power supply 1021 based on the average value of the power supply current.

[0039] In order to perform current balancing control between power supply groups 101 connected in parallel, each main power supply 1021 sums the supply current of itself and the main power supplies 1021 of other power supply groups 101, and then divides the sum by the total number of power supply groups 101 to obtain the average value of the supply current, and continuously adjusts the supply voltage output to the first output voltage based on the average value of the supply current.

[0040] The slave power supply 1022 is configured to collect the supply voltages of all the power supply sources 102 in the power supply group 101 where it is located, and determine the second output voltage of each slave power supply 1022 in the power supply group 101 based on the average value of the supply voltages.

[0041] In order to perform voltage balancing control between the power supplies 102 connected in series, each slave power supply 1022 sums the supply voltage of itself and the main power supply 1021 and the slave power supply 1022 of the power supply group 101, and then divides it by the total number of power supplies 102 in the power supply group 101 to obtain the average value of the supply voltage, and continuously adjusts the output power voltage to the second output voltage based on the average value of the supply voltage.

[0042] In a specific implementation, a proportional-integral controller (not shown) is provided in the power supply 102 to perform balanced adjustment of the power supply voltage.

[0043] The main power supply 1021 obtains a first voltage control value according to a current error value between its own power supply current and an average value of the power supply current, and outputs a first output voltage according to a reference voltage value and the first voltage control value.

[0044]

[0045] in, is the current error value, is its own supply current, is the average value of the supply current.

[0046]

[0047] in, is the first voltage control value, It is the proportional gain, which determines the response strength of the integral controller to the error value. The output of the controller is proportional to the current error signal. The proportional gain is used to quickly respond to error changes and accelerate the dynamic response of the system.

[0048] It is the integral gain, the response speed of the integral controller to the accumulated error value. The integral gain is used to eliminate the steady-state error and make the system output closer to the voltage reference point. and The value of is adjusted according to the application requirements of the power supply circuit 100.

[0049] In the dynamic balancing adjustment of the main power supply 1021, the current sharing imbalance is an important parameter for evaluating the performance of the parallel power supply group 101, and is also the basis for determining whether current sharing measures need to be taken.

[0050]

[0051] It is the current sharing imbalance. When the current sharing imbalance between the main power supplies 1021 is less than 5%, it can be considered that the main power supply 1021 is in a balanced power supply state. When the imbalance is greater than or equal to 5%, a closed-loop control balance adjustment scheme of the main power supply 1021 is performed. The range of the current sharing imbalance for taking the current sharing measure can be adjusted according to the application requirements of the power supply circuit 100.

[0052] The slave power supply 1022 obtains a second voltage control value according to a current error value between its own power supply current and an average value of the power supply current, and outputs a second output voltage according to the reference voltage value and the second voltage control value.

[0053]

[0054] in, is the voltage error value, is its own supply voltage, is the average value of the supply voltage.

[0055]

[0056] in, is the second voltage control value, It is the proportional gain, which determines the response strength of the integral controller to the error value. The output of the controller is proportional to the current error signal. The proportional gain is used to quickly respond to error changes and accelerate the dynamic response of the system.

[0057] is the integral gain, the response speed of the integral controller to the accumulated error value. The integral gain is used to eliminate the steady-state error and make the system output closer to the voltage reference point. K p and The value of is adjusted according to the application requirements of the power supply circuit 100.

[0058] It is understandable that the average values ​​of the supply voltages between each power group 101 may be different, so the second output voltages output by the slave power supply 1022 of each power group 101 may also be different.

[0059] In the dynamic balancing adjustment of the power supply group 101, the voltage imbalance is an important parameter for evaluating the performance of the power supply group 101 connected in series, and is also the basis for determining whether current balancing measures need to be taken.

[0060]

[0061] When the voltage imbalance between the power supplies 102 of the power group 101 is less than 5%, it can be considered that the power supplies 102 of the power group 101 are in a balanced power supply state. When the imbalance is greater than or equal to 5%, the closed-loop control balance adjustment scheme of the power group 101 is performed. The range of the voltage imbalance for taking the current sharing measure can be adjusted according to the application requirements of the power circuit 100.

[0062] The Kp and The value of can be set to the same or different values ​​according to the application requirements of the power supply circuit 100.

[0063] Among them, the response speed of current balancing adjustment is much faster than that of voltage balancing adjustment. The main power supply 1021 is closest to the power supply bus 1011 in the power supply group 101, and usually needs to respond quickly to changes in load demand, while voltage balancing adjustment requires a smoother adjustment of voltage to avoid the impact of excessively fast voltage changes on the system.

[0064] In a specific embodiment, the power supply circuit 100 also includes a communication bus 103, and each power supply 102 is respectively connected to the communication bus 103; wherein the main power supply 1021 obtains the power supply current value of the main power supply 1021 of other power supply groups 101 through the communication bus 103; the slave power supply 1022 obtains the power supply voltage values ​​of all power supplies 102 of the power supply group 101 to which it is located through the communication bus 103.

[0065] Each power supply 102 sends its own power supply voltage value and / or power supply current value through the communication bus 103, and collects the voltage value and / or power supply current value of other power supplies 102, so as to react to the power supply circuit 100 as quickly as possible. Specifically, the power supply 102 sends the power supply voltage, power supply current and communication address value to the communication bus 103, and after receiving the information sent by other power supplies 102 and its own information, it caches them in the array of storage elements of the power supply 102 in descending order according to the communication address value, for balancing adjustment.

[0066] The power supply 102 constituting the power supply circuit 100 cannot know the circuit connection relationship between itself and other power supplies 102 during communication, so in a specific implementation, the power supply 102 receives a communication address value, and determines its power supply group 101 according to the communication address value and the total number of power supply groups 101; the power supply 102 receives the communication address values ​​of all power supplies 102 in its power supply group 101, determines that the power supply 102 with the smallest communication address value is the main power supply 1021, and determines itself as the main power supply 1021 or the slave power supply 1022.

[0067] After the power supply 102 determines that it is the master power supply 1021 or the slave power supply 1022 , it determines its own balancing adjustment scheme.

[0068] In a specific implementation, the power supply 102 includes a dip switch 1023 , and the communication address value of the power supply 102 is configured via the dip switch 1023 .

[0069] See also Figure 3 , Figure 3 It is a schematic diagram of the power structure of another embodiment of the power circuit of the present application. The dip switch 1023 is a communication address configuration element composed of multiple switches, which can be composed of 2 to 10 switches configured as binary code. During the production process of the power supply 102, the total number of switches of the dip switch 1023 can be set according to the number of power supplies 102 constituting the power circuit 100. Each switch represents a binary bit, and the communication address value of each power switch is represented by different switch combinations.

[0070] In other implementations, the control module 104 may use the communication bus 103 to send the communication address value to each power module to determine the communication address value.

[0071] In other embodiments, each power supply 102 is connected to a measuring module, which collects the supply voltage and / or supply current of each power supply 102 through the measuring module, and then sends the supply voltage and / or supply current of each power supply 102 through the communication bus 103; or each power supply 102 is connected to a control module 104 through the communication bus 103, and the control module 104 uniformly collects the supply voltage value and / or supply current value of each power supply 102 sent by the power supply 102, integrates the values ​​and then uniformly sends them to each power supply 102, so as to timely monitor each power supply 102 of the power supply circuit 100.

[0072] See also Figure 4 , Figure 4 It is a circuit structure diagram of another implementation mode of the power supply circuit of the present application.

[0073] The power supply circuit 100 includes a plurality of power supply groups 101 connected in parallel, each power supply group 101 includes a plurality of power supply sources 102 connected in series, including a main power supply 1021 and a plurality of slave power supplies 1022; In the present application, the power supply groups 101 of the power supply circuit 100 are connected to the power supply bus 1011 through an air switch or a junction box (not shown) to achieve mutual parallel connection. The power supply groups 101 that are closest to the power supply bus 1011 are configured as the main power supply 1021, and the difference between the power supply 102 being configured as the main power supply 1021 or the slave power supply 1022 is only due to the circuit connection relationship, and different power supplies 102 are provided in the balanced adjustment scheme. It can be understood that when the power supply circuit 100 is working normally, the main power supply 1021 and the slave power supply 1022 are simultaneously outputting voltage, and the output is also the same or similar power supply voltage that is within the working range.

[0074] The master power supply 1021 is configured to collect the power supply current of itself and the master power supplies 1021 of other power supply groups 101, and determine the first output voltage of the master power supply 1021 based on the average value of the power supply current. The slave power supply 1022 is configured to collect the power supply voltage of all power supplies 102 of the power supply group 101 to which it belongs, and determine the second output voltage of each slave power supply 1022 of the power supply group 101 based on the average value of the power supply voltage.

[0075] The power supply circuit 100 in this embodiment forms a parallel-series mixed circuit structure, and different balanced adjustments need to be made according to the connection relationship between the power supplies 102. Current sharing control is performed between the power supply groups 101 connected in parallel, and voltage sharing control is performed between the power supplies 102 connected in series. The specific circuit structure and balanced control scheme can refer to one embodiment and another embodiment of the power supply circuit 100 of this application, and will not be repeated here.

[0076] In a specific embodiment, the power supply circuit 100 further includes a communication bus 103, and each power supply 102 is respectively connected to the communication bus 103; wherein the main power supply 1021 obtains the power supply current value of the main power supply 1021 of other power supply groups 101 through the communication bus 103; the slave power supply 1022 obtains the power supply voltage value of all power supplies 102 of the power supply group 101 in which it is located through the communication bus 103. The power supply 102 of the power supply circuit 100 can refer to Figure 2 A schematic diagram of the communication structure of another embodiment of the power supply circuit of the present application.

[0077] Each power supply 102 sends its own power supply voltage value and / or power supply current value, communication address value and group number through the communication bus 103, and collects the voltage value and / or power supply current value, communication address value and group number of other power supplies 102, so as to react to the power supply circuit 100 as quickly as possible. Specifically, the power supply 102 sends the power supply voltage, power supply current, communication address value and group number to the communication bus 103, and after receiving the information sent by other power supplies 102 and its own information, it caches them in the array of storage elements of the power supply 102 in descending order according to the communication address value for balancing adjustment.

[0078] The power supply 102 constituting the power supply circuit 100 cannot know the circuit connection relationship between itself and other power supplies 102 during communication, so in a specific implementation, the power supply 102 receives a communication address value, and determines its power supply group 101 according to the communication address value and the total number of power supply groups 101; the power supply 102 receives the communication address values ​​of all power supplies 102 in its power supply group 101, determines that the power supply 102 with the smallest communication address value is the main power supply 1021, and determines itself as the main power supply 1021 or the slave power supply 1022.

[0079] Specifically, it is assumed that the power supply circuit 100 is composed of M power supply groups 101 connected in parallel, and each power supply group 101 is composed of N power supplies 102 connected in series, wherein M≥2, N≥2, and the group number=address%M, that is, the group number is the value of the remainder of the address to the total number of power supply groups M. What needs to be handled in particular is that when the remainder obtained after the communication address value is calculated is 0, the group number of the power supply 102 is forcibly assigned to M. Therefore, the group number of all power supplies 102 in the first power supply group 101 is 1, and the group number of all power supplies 102 in the second power supply group 101 is 2. And so on, the group number of the power supplies 102 in the last power supply group 101 is M. It can be seen that the smallest communication address value of the power supply 102 in each power supply group 101 is the group number, and the power supply 102 is the main power supply 1021 of the corresponding power supply group 101, that is, the power supplies 102 with communication address values ​​from 1 to M are all main power supplies 1021.

[0080] After the power supply 102 determines that it is the master power supply 1021 or the slave power supply 1022 , it determines its own balancing adjustment scheme.

[0081] In a specific implementation, the power supply circuit 100 further includes a control module 104 , which is coupled to the power supply 102 via a communication bus 103 ; the control module 104 sends a control signal to the power supply 102 via the communication bus 103 , and the control signal includes a communication address value.

[0082] The control module 104 obtains the total number of power supplies 102 and allocates communication address values ​​from left to right and from top to bottom according to the matrix structure of the power supplies. The communication address values ​​may be binary coded values ​​consisting of 2 to 10 digits.

[0083] In other embodiments, two forms of power supply 102, one configuring the communication address through the DIP switch 1023 and the other configuring the address through the control module 104, may be used in combination to form the power circuit 100. In this case, the number of bits of the communication address value composed of binary code needs to be equal.

[0084] In a specific implementation, the control signal sent by the control module 104 also includes a reference voltage value, wherein the reference voltage values ​​of the master power supply 1021 and the slave power supply 1022 are the same.

[0085] The control module 104 sets the output reference voltage value according to the application scenario or the working condition of the load. The reference voltage value is equal to the total output voltage of a power supply group 101 divided by the number N of power supplies 102 connected in series with the power supply group 101. The total output voltage of the power supply group 101 can be the rated voltage value of the load.

[0086] A power supply circuit 100 provided in the above-mentioned embodiment forms a parallel-series hybrid circuit structure, which can not only improve the power level of the power supply circuit 100, but also improve the voltage level of the power supply circuit 100, and can meet different power supply requirements and improve the working efficiency of the power supply 102. The circuit structure is simple, and the output power of the power supply 102 can be easily, quickly and effectively balanced. It can adapt to the need to quickly respond to changes in load demand and adjust the voltage more smoothly to avoid the impact of excessively rapid voltage changes on the power system. It can better withstand high current and voltage working environments, improve the reliability and stability of the power supply circuit, and help reduce production costs and maintenance costs.

[0087] The present application also provides a power supply method for a power supply circuit.

[0088] See also Figure 5 , Figure 5 It is a flow chart of an implementation method of a power supply method of a power supply circuit of the present application.

[0089] The power supply method of this embodiment is used to provide a balanced adjustment method for a parallel-series hybrid power supply circuit. The power supply circuit sets the output reference voltage value according to the application scenario or the working condition of the load. However, since the internal resistance and output voltage of each power supply constituting the power supply circuit may be different, thereby affecting the load of the power supply, in order to prevent some power supplies from overheating or being damaged due to excessive current, the power supplies need to collect the supply voltage of other power supplies, continuously adjust their own supply voltage, and complete the overall balanced adjustment of the power supply circuit, thereby improving the reliability and life of the power supply circuit, and being able to meet application scenarios with different voltage and current requirements.

[0090] The power circuit includes a plurality of power supply groups connected in parallel, each power supply group includes a plurality of power supply sources connected in series, including a main power supply source and a plurality of slave power supplies; The connection structure of the power supply circuit can refer to Figure 1 The circuit structure diagram of an embodiment of the power supply circuit of the present application is provided to assist in understanding the power supply method of the present embodiment, but does not impose structural limitations on the power supply method.

[0091] In the present application, the power supply groups of the power supply circuit are connected to the power supply bus through a circuit breaker or a junction box to achieve parallel connection with each other. The power supply groups closest to the power supply bus are configured as the main power supply, and the difference between the power supply being configured as the main power supply or the slave power supply is only due to the circuit connection relationship, which results in different power supplies in the balancing adjustment scheme. It can be understood that when the power supply circuit is working normally, the main power supply and the slave power supply are outputting voltage at the same time, and the output is the same or similar power supply voltage within the working range.

[0092] The power supply circuit can be set with more than two power supply groups, and each power supply group can be set with more than two power supplies. It is necessary to ensure that the total number of power supply groups is equal to the number of power supplies in one power supply group to form a power matrix. It is ensured that when each parallel power supply group outputs voltage, the power supplies with the same number share the load, ensuring that the load of each power supply is relatively balanced, thereby increasing the reliability and stability of the power supply circuit.

[0093] The power supply method comprises: S101: A main power supply collects power supply currents of itself and main power supplies of other power supply groups, and determines a first output voltage of the main power supply based on an average value of the power supply currents.

[0094] In order to perform current balancing control between power supply groups connected in parallel, each main power supply sums the supply current of itself and the main power supplies of other power supply groups, and then divides the sum by the total number of power supply groups to obtain the average value of the supply current, and continuously adjusts the output power voltage to the first output voltage based on the average value of the supply current.

[0095] S102: The slave power supply collects the power supply voltages of all the power supply sources in the power supply group to which it belongs, and determines the second output voltage of each slave power supply in the power supply group based on the average value of the power supply voltages.

[0096] In order to control the voltage balance between the power supplies connected in series, each slave power supply sums the supply voltage of itself and the main power supply and slave power supply of the power supply group to which it belongs, and then divides the sum by the total number of power supplies in the power supply group to obtain the average value of the supply voltage. The supply voltage output to the second output voltage is continuously adjusted according to the average value of the supply voltage.

[0097] Each power supply sends its own power supply voltage value and / or power supply current value through the communication bus, and collects the voltage value and / or power supply current value of other power supplies, so as to react to the power supply circuit as quickly as possible. Specifically, the power supply sends the power supply voltage, power supply current and communication address value to the communication bus, and after receiving the information sent by other power supplies and its own information, it caches them in the array of storage elements of the power supply in descending order according to the communication address value, for balancing adjustment.

[0098] Among them, the response speed of current balancing adjustment is much faster than that of voltage balancing adjustment. The main power supply is closest to the power supply bus in the power supply group and usually needs to respond quickly to changes in load demand. Voltage balancing adjustment requires smoother voltage adjustment to avoid the impact of excessively fast voltage changes on the system.

[0099] See also Figure 6 , Figure 6 It is a flow chart of another embodiment of the power supply method of the power supply circuit of the present application.

[0100] The power supply method of this embodiment is used to provide a balanced adjustment method for a parallel-series hybrid power supply circuit. The power supply circuit sets the output reference voltage value according to the application scenario or the working condition of the load. However, since the internal resistance and output voltage of each power supply constituting the power supply circuit may be different, thereby affecting the load of the power supply, in order to prevent some power supplies from overheating or being damaged due to excessive current, the power supplies need to collect the supply voltage of other power supplies, continuously adjust their own supply voltage, and complete the overall balanced adjustment of the power supply circuit, thereby improving the reliability and life of the power supply circuit, and being able to meet application scenarios with different voltage and current requirements.

[0101] The power circuit includes a plurality of power supply groups connected in parallel, each power supply group includes a plurality of power supply sources connected in series, including a main power supply source and a plurality of slave power supplies; The connection structure of the power supply circuit can refer to Figure 1 The circuit structure diagram of an embodiment of the power supply circuit of the present application is provided to assist in understanding the power supply method of the present embodiment, but does not impose structural limitations on the power supply method.

[0102] In a specific embodiment, the power supply circuit further includes a communication bus, and each power supply is connected to the communication bus respectively; wherein the main power supply obtains the power supply current value of the main power supply of other power supply groups through the communication bus; and the slave power supply obtains the power supply voltage value of all power supplies of the power supply group to which it belongs through the communication bus. In a specific embodiment, the control signal sent by the control module also includes a reference voltage value, wherein the reference voltage values ​​of the main power supply and the slave power supply are the same.

[0103] The connection structure of the power supply circuit can refer to Figure 2 A communication structure diagram of another embodiment of the power supply circuit of the present application is provided to assist in understanding the power supply method of the present embodiment without making any structural limitation on the power supply method.

[0104] Each power supply sends its own power supply voltage value and / or power supply current value through the communication bus, and collects the voltage value and / or power supply current value of other power supplies, so as to react to the power supply circuit as quickly as possible. Specifically, the power supply sends the power supply voltage, power supply current and communication address value to the communication bus, and after receiving the information sent by other power supplies and its own information, it caches them in the array of storage elements of the power supply in descending order according to the communication address value, for balancing adjustment.

[0105] S201: The main power supply collects the power supply current of itself and the main power supplies of other power supply groups.

[0106] In order to perform current balancing control between power supply groups connected in parallel, each main power supply sums the supply current of itself and the main power supplies of other power supply groups, and then divides the sum by the total number of power supply groups to obtain the average value of the supply current, and continuously adjusts the output power voltage to the first output voltage based on the average value of the supply current.

[0107] In a specific implementation, a proportional-integral controller (not shown) is provided in the power supply to perform balanced adjustment of the power supply voltage.

[0108] S202: The main power supply obtains a first voltage control value according to a current error value between its own power supply current and an average value of the power supply current, and outputs a first output voltage according to a reference voltage value and the first voltage control value.

[0109] The main power supply obtains a first voltage control value according to a current error value between its own power supply current and an average value of the power supply current, and outputs a first output voltage according to a reference voltage value and the first voltage control value.

[0110]

[0111] in, is the current error value, is its own supply current, is the average value of the supply current.

[0112]

[0113] in, is the first voltage control value, K p It is the proportional gain, which determines the response strength of the integral controller to the error value. The output of the controller is proportional to the current error signal. The proportional gain is used to quickly respond to error changes and accelerate the dynamic response of the system.

[0114] is the integral gain, the response speed of the integral controller to the accumulated error value. The integral gain is used to eliminate the steady-state error and make the system output closer to the voltage reference point. K p and The value is adjusted according to the application requirements of the power circuit.

[0115] In the dynamic balancing adjustment of the main power supply, the current sharing imbalance is an important parameter for evaluating the performance of the parallel power supply group, and is also the basis for determining whether current sharing measures need to be taken.

[0116]

[0117] It is the current sharing imbalance. When the current sharing imbalance between the main power supplies is less than 5%, it can be considered that the main power supplies are in a balanced power supply state. When the imbalance is greater than or equal to 5%, the closed-loop control balance adjustment plan of the main power supply is carried out. The range of the current sharing imbalance for taking current sharing measures can be adjusted according to the application requirements of the power supply circuit.

[0118] S203: The slave power supply collects the power supply voltages of all power supplies of the power supply group to which it belongs.

[0119] In order to control the voltage balance between the power supplies connected in series, each slave power supply sums the supply voltage of itself and the main power supply and slave power supply of the power supply group to which it belongs, and then divides the sum by the total number of power supplies in the power supply group to obtain the average value of the supply voltage. The supply voltage output to the second output voltage is continuously adjusted according to the average value of the supply voltage.

[0120] S204: The slave power supply obtains a second voltage control value according to a voltage error value between its own power supply voltage and an average value of the power supply voltage, and outputs a second output voltage according to the reference voltage value and the second voltage control value.

[0121]

[0122] in, is the voltage error value, is its own supply voltage, is the average value of the supply voltage.

[0123]

[0124] in, is the second voltage control value, It is the proportional gain, which determines the response strength of the integral controller to the error value. The output of the controller is proportional to the current error signal. The proportional gain is used to quickly respond to error changes and accelerate the dynamic response of the system.

[0125] It is the integral gain, the response speed of the integral controller to the accumulated error value. The integral gain is used to eliminate the steady-state error and make the system output closer to the voltage reference point. and The value is adjusted according to the application requirements of the power circuit.

[0126] It is understandable that the average values ​​of the supply voltages of each power supply group may be different, so the second output voltages of the slave power supplies of each power supply group may also be different.

[0127] In the dynamic balancing adjustment of the power supply group, the voltage imbalance is an important parameter for evaluating the performance of the series power supply group, and is also the basis for determining whether current balancing measures need to be taken.

[0128]

[0129] It is the voltage imbalance. When the voltage imbalance between the power supplies of the power supply group is less than 5%, it can be considered that the power supply of the power supply group is in a balanced power supply state. When the imbalance is greater than or equal to 5%, the closed-loop control balance adjustment plan of the power supply group is carried out. The range of voltage imbalance for taking current sharing measures can be adjusted according to the application requirements of the power supply circuit.

[0130] The master power supply and the slave power supply can be used for balancing adjustment and The value can be set to the same or different values ​​according to the application requirements of the power supply circuit.

[0131] Among them, the response speed of current balancing adjustment is much faster than that of voltage balancing adjustment. The main power supply is closest to the power supply bus in the power supply group and usually needs to respond quickly to changes in load demand. Voltage balancing adjustment requires smoother voltage adjustment to avoid the impact of excessively fast voltage changes on the system.

[0132] See also Figure 7 , Figure 7 It is a flow chart of another implementation method of the power supply method of the power supply circuit of the present application.

[0133] The power supply method of this embodiment is used to provide a balanced adjustment method for a parallel-series hybrid power supply circuit. The power supply circuit sets the output reference voltage value according to the application scenario or the working condition of the load. However, since the internal resistance and output voltage of each power supply constituting the power supply circuit may be different, thereby affecting the load of the power supply, in order to prevent some power supplies from overheating or being damaged due to excessive current, the power supplies need to collect the supply voltage of other power supplies, continuously adjust their own supply voltage, and complete the overall balanced adjustment of the power supply circuit, thereby improving the reliability and life of the power supply circuit, and being able to meet application scenarios with different voltage and current requirements.

[0134] The power circuit includes a plurality of power supply groups connected in parallel, each power supply group includes a plurality of power supply sources connected in series, including a main power supply source and a plurality of slave power supplies; The connection structure of the power supply circuit can refer to Figure 1 The circuit structure diagram of an embodiment of the power supply circuit of the present application is provided to assist in understanding the power supply method of the present embodiment, but does not impose structural limitations on the power supply method.

[0135] The power supply constituting the power supply circuit cannot know the circuit connection relationship between itself and other power supplies during communication, so in a specific implementation, the power supply receives a communication address value, and determines its power supply group based on the communication address value and the total number of power supply groups; the power supply receives the communication address values ​​of all power supplies in its power supply group, determines that the power supply with the smallest communication address value is the main power supply, and determines itself as the main power supply or the slave power supply.

[0136] After the power supply determines whether it is the main power supply or the slave power supply, it determines its own balancing adjustment plan.

[0137] S301: The power supply receives a communication address value; based on the communication address value, the total number of power supply groups is modulo, a group number is obtained, and the power supply group to which the power supply belongs is determined.

[0138] In a specific embodiment, the power supply circuit also includes a communication bus, and each power supply is respectively connected to the communication bus; wherein the main power supply obtains the power supply current value of the main power supply of other power supply groups through the communication bus; the slave power supply obtains the power supply voltage values ​​of all power supplies of its power supply group through the communication bus.

[0139] Each power supply sends its own power supply voltage value and / or power supply current value through the communication bus, and collects the voltage value and / or power supply current value of other power supplies, so as to react to the power supply circuit as quickly as possible. Specifically, the power supply sends the power supply voltage, power supply current and communication address value to the communication bus, and after receiving the information sent by other power supplies and its own information, it caches them in the array of storage elements of the power supply in descending order according to the communication address value, for balancing adjustment.

[0140] In a specific implementation, the power supply includes a dip switch, and the communication address value of the power supply is configured by the dip switch. The power supply structure including the dip switch can be referred to in Figure 3 A schematic diagram of the power supply structure of another embodiment of the power supply circuit of the present application. The dip switch is a communication address configuration element composed of multiple switches, which can be composed of 2 to 10 switches configured as binary code. During the power supply production process, the total number of dip switches can be set according to the number of power supplies that make up the power supply circuit. Each switch represents a binary bit, and the communication address value of each power switch is represented by different switch combinations.

[0141] Alternatively, in a specific embodiment, the power circuit further includes a control module, the control module is coupled to the power supply via a communication bus; the control module sends a control signal to the power supply via the communication bus, and the control signal includes a communication address value. The control module obtains the total number of power supplies and allocates the communication address value from left to right and then from top to bottom according to the matrix structure of the power supply, and the communication address value can be a binary coded value consisting of 2 to 10 digits.

[0142] In other implementations, the power supply circuit may be composed of a power supply in the form of a communication address configured by a DIP switch and an address configured by a control module. In this case, the number of bits of the communication address value composed of binary code needs to be equal.

[0143] S302: The power supply receives the communication address values ​​of all power supplies of the power supply group to which it belongs, determines that the power supply with the smallest communication address value is the master power supply, and determines itself as the master power supply or the slave power supply.

[0144] For details, please refer to Figure 8 , Figure 8 yes Figure 7 A schematic diagram of a master power supply and a slave power supply allocation process of another embodiment of a power supply method for a power supply circuit of the present application.

[0145] The power supply circuit is assumed to be composed of M power supply groups in parallel, and each power supply group is composed of N power supplies in series, where M≥2, N≥2, and the group number = address%M, that is, the group number is the value of the remainder of the address to the total number of power supply groups M. What needs special treatment is that when the remainder obtained after the communication address value is calculated is 0, the group number must be forcibly assigned to M. Therefore, the group number of all power supplies in the first power supply group is 1, and the group number of all power supplies in the second power supply group is 2, and so on, and the group number of the power supplies in the last power supply group is M. It can be seen that the smallest communication address value of the power supply in each power supply group is the group number, and the power supply is the main power supply of the corresponding power supply group, that is, the power supplies with communication address values ​​of 1 to M are all main power supplies.

[0146] After the power supply determines whether it is the main power supply or the slave power supply, it determines its own balancing adjustment plan.

[0147] S303: The main power supply collects the power supply current of itself and the main power supplies of other power supply groups.

[0148] S304: The main power supply obtains a first voltage control value according to a current error value between its own power supply current and an average value of the power supply current, and outputs a first output voltage according to a reference voltage value and the first voltage control value.

[0149] In order to perform current sharing control between power supply groups connected in parallel, each main power supply sums the supply current of itself and the main power supplies of other power supply groups, and then divides it by the total number of power supply groups to obtain the average value of the supply current, and continuously adjusts the supply voltage output as the first output voltage according to the average value of the supply current. Specifically, steps S303 and S304 of the adjustment scheme of the main power supply can refer to S201 and S202 respectively, and will not be repeated here.

[0150] S305: The slave power supply collects the power supply voltages of all power supplies in the power supply group to which it belongs.

[0151] S306: The slave power supply obtains a second voltage control value according to a voltage error value between its own power supply voltage and an average value of the power supply voltage, and outputs a second output voltage according to the reference voltage value and the second voltage control value.

[0152] In order to perform voltage balancing control between power supplies connected in series, each slave power supply sums the power supply voltage of itself and the main power supply and slave power supply of the power supply group in which it is located, and then divides it by the total number of power supplies in the power supply group to obtain an average value of the power supply voltage, and continuously adjusts the power supply voltage output as the second output voltage according to the average value of the power supply voltage. Specifically, steps S305 and S306 of the adjustment scheme of the slave power supply can refer to S203 and S204 respectively.

[0153] Among them, the response speed of current balancing adjustment is much faster than that of voltage balancing adjustment. The main power supply is closest to the power supply bus in the power supply group and usually needs to respond quickly to changes in load demand. Voltage balancing adjustment requires smoother voltage adjustment to avoid the impact of excessively fast voltage changes on the system.

[0154] Different from the prior art, a power supply circuit and a power supply method form a parallel-series hybrid circuit structure, which can not only improve the power level of the power supply circuit, but also improve the voltage level of the power supply circuit, can meet different power supply requirements, and improve the working efficiency of the power supply. The circuit structure is simple, and the output power of the power supply can be easily, quickly and effectively balanced. It can adapt to the need to quickly respond to changes in load demand and adjust the voltage more smoothly to avoid the impact of excessively rapid voltage changes on the power system. It can better withstand high current and voltage working environments, improve the reliability and stability of the power supply circuit, and help reduce production costs and maintenance costs.

[0155] In the several embodiments provided in the present application, it should be understood that the disclosed systems and devices can be implemented in other ways. For the technical solutions in the embodiments of the present application, it is obvious that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application. For example, the device implementation described above is only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0156] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0157] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "coupled", "connected", "connected", "set", and "installed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0158] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0159] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0160] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A power supply circuit, It is characterized in that The power supply circuit includes a plurality of power supply groups connected in parallel, each of the power supply groups includes a plurality of power supply sources connected in series, including a main power supply source and a plurality of slave power supplies; The main power supply is configured to collect power supply currents of itself and the main power supplies of other power supply groups, and determine a first output voltage of the main power supply based on an average value of the power supply currents; The slave power supply is configured to collect the power supply voltages of all the power supply sources in the power supply group to which it belongs, and determine the second output voltage of each slave power supply in the power supply group based on an average value of the power supply voltages.

2. The power supply circuit according to claim 1, It is characterized in that The power supply circuit further comprises a communication bus, and each of the power supplies is respectively connected to the communication bus; The main power supply obtains the power supply current value of the main power supply of the other power supply groups through the communication bus; the slave power supply obtains the power supply voltage values ​​of all power supplies of the power supply group to which it belongs through the communication bus.

3. The power supply circuit according to claim 1 or 2, It is characterized in that The main power supply obtains a first voltage control value according to a current error value between its own power supply current and an average value of the power supply current, and outputs the first output voltage according to a reference voltage value and the first voltage control value; The slave power supply obtains a second voltage control value according to a voltage error value between its own power supply voltage and an average value of the power supply voltage, and outputs the second output voltage according to the reference voltage value and the second voltage control value.

4. The power supply circuit according to claim 1 or 2, It is characterized in that The power supply receives a communication address value, and determines the power supply group to which it belongs according to the communication address value and the total number of the power supply groups; The power supply receives the communication address values ​​of all the power supplies in the power supply group to which it belongs, determines that the power supply with the smallest communication address value is the main power supply, and determines itself as the main power supply or the slave power supply.

5. The power supply circuit according to claim 4, It is characterized in that The power supply circuit also includes a control module, and the control module is coupled to the power supply via a communication bus; the control module sends a control signal to the power supply via the communication bus, and the control signal includes a communication address value.

6. The power supply circuit according to claim 5, It is characterized in that The control signal sent by the control module also includes a reference voltage value, wherein the reference voltage values ​​of the master power supply and the slave power supply are the same.

7. The power supply circuit according to claim 4, It is characterized in that The power supply includes a dip switch, and the communication address value of the power supply is configured by the dip switch.

8. A method for supplying power to a power circuit, It is characterized in that The power supply circuit includes a plurality of power supply groups connected in parallel, each of the power supply groups includes a plurality of power supply sources connected in series, including a main power supply source and a plurality of slave power supplies; the power supply method includes: The main power supply collects power supply currents of itself and the main power supplies of other power supply groups, and determines a first output voltage of the main power supply based on an average value of the power supply currents; The slave power supply collects the power supply voltages of all the power supply sources in the power supply group in which it is located, and determines the second output voltage of each slave power supply in the power supply group based on an average value of the power supply voltages.

9. The power supply method according to claim 8, It is characterized in that The power supply method comprises: The step of determining the first output voltage of the main power supply based on the average value of the power supply current comprises: the main power supply obtains a first voltage control value according to a current error value between its own power supply current and the average value of the power supply current, and outputs the first output voltage according to a reference voltage value and the first voltage control value; The step of determining the second output voltage of each slave power supply of the power supply group based on the average value of the power supply voltage includes: the slave power supply obtains a second voltage control value according to a voltage error value between its own power supply voltage and the average value of the power supply voltage, and outputs the second output voltage according to the reference voltage value and the second voltage control value.

10. The power supply method according to claim 8, It is characterized in that The step of the main power supply collecting the power supply current of itself and the main power supplies of other power supply groups includes: the power supply receiving a communication address value; according to the communication address value, taking the remainder of the total number of power supply groups to obtain a group number, and determining the power supply group to which it belongs; The power supply receives the communication address values ​​of all the power supplies in the power supply group to which it belongs, determines that the power supply with the smallest communication address value is the main power supply, and determines itself as the main power supply or the slave power supply.

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