Switching power supply, control method, system and equipment thereof and readable storage medium

Abstract

The invention discloses a switching power supply and a control method, system and device thereof, and a readable storage medium, and the method comprises the steps: selecting at least two switching tubes from different bridge arms for each voltage output end to form a matched switching tube group; a driving signal matched with each switch tube in the switch tube group is determined, the driving signal comprises a first pulse and a second pulse which are periodically alternated, the width of at least one of the first pulse and the second pulse is adjustable, and the width of the first pulse and the width of the second pulse are smaller than or equal to T / 2; and outputting a corresponding driving signal to each switching tube, so that each switching tube in the matched switching tube group forms a current closed loop in the overlapped conduction period, and outputting a target voltage from the voltage output end. According to the invention, the conduction loss of the switching tube can be effectively reduced, and the maximum conduction time of a single pulse is limited, so that the release of energy stored in a parasitic inductor and a capacitor is facilitated, and the switching power supply has higher robustness and stronger load mutation resistance.

Description

Technical Field

[0001] The present invention relates to the field of switching power supplies, and in particular to a switching power supply and a control method, system, device and readable storage medium thereof. Background Art

[0002] Switching power supplies using IGBTs (Insulated-Gate Bipolar Transistors) as switching devices and PWM (Pulse Width Modulation) control can vary the output voltage by adjusting the duty cycle, thereby regulating the current and power applied to the load. Commonly used high-power switching power supplies typically employ an H-bridge topology, which dynamically adjusts the conduction timing and duty cycle of each IGBT through a PWM control strategy. Each IGBT in the H-bridge topology maintains a fixed and equal on-time during each cycle. However, the on-time of each IGBT is affected by its own parasitic parameters, resulting in additional losses and reduced power supply efficiency.

[0003] Therefore, how to provide a solution to the above technical problems is a problem that those skilled in the art need to solve at present. Summary of the Invention

[0004] The purpose of the present invention is to provide a switching power supply and its control method, system, device and readable storage medium, which can effectively reduce the conduction loss of the switching tube, and by limiting the maximum conduction time of a single pulse, help promote the release of parasitic inductance and energy stored in the capacitor, so that the switching power supply has higher robustness and stronger resistance to load mutations.

[0005] To solve the above technical problems, the present invention provides a method for controlling a switching power supply. The switching power supply includes an inverter unit, the inverter unit includes at least two bridge arms, each of the bridge arms includes two switching transistors, and a common terminal of the two switching transistors serves as a voltage output terminal of the inverter unit. The method for controlling the switching power supply includes:

[0006] For each of the voltage output terminals, at least two of the switch tubes are selected from different bridge arms to form a coordinated switch tube group;

[0007] Determining a drive signal for each of the switching transistors in the coordinated switching transistor group, wherein the drive signal includes a first pulse and a second pulse that periodically alternate, wherein the width of at least one of the first pulse and the second pulse is adjustable, and the width of the first pulse and the width of the second pulse are less than or equal to T / 2, where T is the period;

[0008] A corresponding driving signal is output to each of the switch tubes, so that each of the switch tubes in the coordinated switch tube group forms a current closed loop during the overlapping conduction period, and outputs a target voltage from the voltage output terminal.

[0009] Optionally, the process of outputting a corresponding driving signal to each of the switch tubes so that each of the switch tubes in the coordinated switch tube group forms a current closed loop during an overlapping conduction period and outputs a target voltage from the voltage output terminal includes:

[0010] In a single cycle, the first pulse and the second pulse are respectively applied to each switch tube in the coordinated switch tube group, so that each switch tube in the coordinated switch tube group forms a current closed loop during the overlapping conduction period and outputs the target voltage from the voltage output end.

[0011] Optionally, the process of determining the driving signal of each switching transistor in the coordinated switching transistor group includes:

[0012] Determining the continuous on-time of each switch in the coordinated switch group in each cycle, where the continuous on-time of at least one switch is less than T / 2, and the continuous on-times of the switches in the coordinated switch group are different;

[0013] A driving signal for the switch tube is generated according to a continuous conduction time corresponding to the switch tube; the continuous conduction time corresponds to the width.

[0014] Optionally, the process of generating the driving signal of the switching tube according to the continuous conduction time corresponding to the switching tube includes:

[0015] For each of the switching transistors, determining a first continuous on-time of the switching transistor in an i-th cycle and a second continuous on-time of the switching transistor in an (i+1)-th cycle, and generating a driving signal for the switching transistor according to the first continuous on-time and the second continuous on-time, where i is a positive integer;

[0016] The first continuous on-time and the second continuous on-time are different. The first continuous on-time corresponds to the width of the first pulse, and the second continuous on-time corresponds to the width of the second pulse.

[0017] Optionally, for each of the voltage output terminals, the process of selecting at least two switch tubes from different bridge arms to form a coordinated switch tube group includes:

[0018] For each of the voltage output ends, two of the switch tubes are selected to form a coordinated switch tube group, and the two switch tubes are respectively located at the upper tube position and the lower tube position of different bridge arms.

[0019] Optionally, the process of determining the continuous on-time of each switching tube in the coordinated switching tube group in each cycle includes:

[0020] Determine a third continuous on-time of the first switch tube in the coordinated switch tube group in the i-th cycle and a fourth continuous on-time of the second switch tube in the i-th cycle, wherein the fourth continuous on-time and the continuous on-time are the same as the continuous on-time of the first switch tube in the i+1 cycle, where i is a positive integer.

[0021] To solve the above technical problems, the present invention further provides a control system for a switching power supply, wherein the switching power supply includes an inverter unit, the inverter unit includes at least two bridge arms, each of the bridge arms includes two switching tubes, and the common end of the two switching tubes serves as the voltage output end of the inverter unit. The control system for the switching power supply includes:

[0022] A selection module, configured to select at least two of the switch tubes from different bridge arms to form a coordinated switch tube group for each of the voltage output terminals;

[0023] a determination module, configured to determine a drive signal for each of the switching transistors in the coordinated switching transistor group, wherein the drive signal includes a first pulse and a second pulse that periodically alternate, wherein the width of at least one of the first pulse and the second pulse is adjustable, and the width of the first pulse and the width of the second pulse are less than or equal to T / 2, where T is the period;

[0024] The control module is used to output a corresponding driving signal to each of the switch tubes, so that each of the switch tubes in the coordinated switch tube group forms a current closed loop during the overlapping conduction period and outputs the target voltage from the voltage output terminal.

[0025] To solve the above technical problems, the present invention further provides an electronic device, comprising:

[0026] Memory for storing computer programs;

[0027] A processor is configured to implement the steps of the switching power supply control method as described above when executing the computer program.

[0028] To solve the above technical problems, the present invention further provides a switching power supply, comprising an inverter unit and the electronic device as described above.

[0029] To solve the above technical problems, the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the switching power supply control method as described in any one of the above are implemented.

[0030] The present application provides a control method for a switching power supply. For each switching tube in the inverter unit, it is driven by a driving signal consisting of a periodically alternating first pulse and a second pulse. The width of at least one of the first pulse and the second pulse is adjustable and can be adjusted from 0 to T / 2, thereby shortening the continuous conduction time of each switching tube in each cycle, effectively reducing the conduction loss of the switching tube. By limiting the maximum conduction time of a single pulse, it helps to promote the release of energy stored in parasitic inductance and capacitance, making the switching power supply more robust and more resistant to load mutations. The present application also provides a control system, electronic equipment, switching power supply, and computer-readable storage medium for a switching power supply, which have the same beneficial effects as the above-mentioned control method for the switching power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0032] Figure 1 A schematic structural diagram of a switching power supply provided by the present invention;

[0033] Figure 2 A flow chart of the steps of a control method for a switching power supply provided by the present invention;

[0034] Figure 3 A schematic diagram of a driving signal of a switch tube provided by the present invention;

[0035] Figure 4 A schematic diagram of a driving signal for another switching tube provided by the present invention;

[0036] Figure 5 A schematic structural diagram of a control system of a switching power supply provided by the present invention;

[0037] Figure 6 The figure is a schematic structural diagram of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0038] The core of the present invention is to provide a switching power supply and its control method, system, device and readable storage medium, which can effectively reduce the conduction loss of the switching tube. By limiting the maximum conduction time of a single pulse, it helps to promote the release of parasitic inductance and energy stored in the capacitor, so that the switching power supply has higher robustness and stronger resistance to load mutations.

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0040] The embodiment of the present invention provides a control method for a switching power supply. To facilitate understanding of the control method provided by this embodiment, the switching power supply to which it is applicable is described. Figure 1 , Figure 1 This is a schematic diagram of the structure of a switching power supply provided by an embodiment of the present invention. The inverter unit in the switching power supply adopts an H-bridge structure. The H-bridge includes two bridge arms. The first bridge arm includes a first upper switching tube Q1 and a first lower switching tube Q2, and the second bridge arm includes a second upper switching tube Q3 and a second lower switching tube Q4. The connection end (i.e., point a) of the first upper switching tube Q1 and the first lower switching tube Q2 serves as the first voltage output end of the inverter unit, and the connection end (i.e., point b) of the second upper switching tube Q3 and the second lower switching tube Q4 serves as the second voltage output end of the inverter unit. By controlling the conduction or disconnection of the upper and lower switching tubes of the two bridge arms, the voltages output by the two voltage output ends can be regulated, thereby achieving current regulation and power regulation on the load.

[0041] I understand. Figure 1 Two bridge arms are shown in the figure, so the inverter unit has two voltage output terminals. When the inverter unit includes three bridge arms, the inverter unit has three voltage output terminals. For ease of description, the following description is based on the example of an inverter unit using an H-bridge structure. The same applies to inverter units with other structures.

[0042] Please refer to Figure 2 , the control method of the switching power supply includes:

[0043] S101: For each voltage output terminal, select at least two switching tubes from different bridge arms to form a coordinated switching tube group;

[0044] In this embodiment, for each voltage output terminal, a group of switching transistors capable of working in conjunction is selected from each of the first and second bridge arms to form a coordinated switching transistor group. The switching transistors in each coordinated switching transistor group are from different bridge arms. In one exemplary embodiment, for each voltage output terminal, the process of selecting at least two switching transistors from different bridge arms to form a coordinated switching transistor group includes: selecting two switching transistors from each voltage output terminal to form a coordinated switching transistor group, with the two switching transistors located at the upper and lower positions of different bridge arms, respectively. Specifically, for the first voltage output terminal a in the first bridge arm, the first upper switching transistor Q1 and the second lower switching transistor Q4 are selected as the coordinated switching transistor group; for the second voltage output terminal b in the second bridge arm, the first lower switching transistor Q2 and the first upper switching transistor Q3 are selected as the coordinated switching transistor group. When a specific voltage needs to be output from point a, the first upper switching transistor Q1 and the second lower switching transistor Q4 are turned on in conjunction; when a specific voltage needs to be output from point b, the first lower switching transistor Q2 and the first upper switching transistor Q3 are turned on in conjunction. It will be understood that only one switching transistor in each bridge arm is turned on at any given time.

[0045] S102: Determine a drive signal for each switching transistor in the switching transistor group, the drive signal including a first pulse and a second pulse that periodically alternate, the width of at least one of the first pulse and the second pulse being adjustable, the width of the first pulse and the width of the second pulse being less than or equal to T / 2, where T is the period;

[0046] In this embodiment, the driving signals of the two switching tubes in the switching tube group are determined separately. Taking one switching tube as an example, the driving signal of the switching tube is composed of a first pulse and a second pulse that alternate periodically, that is, the driving signal of the switching tube is a first pulse in the first cycle, a second pulse in the second cycle, a first pulse in the third cycle, a second pulse in the fourth cycle, and so on. Alternatively, the driving signal of the switching tube is a second pulse in the first cycle, a first pulse in the second cycle, a second pulse in the third cycle, a first pulse in the fourth cycle, and so on.

[0047] It will be appreciated that in this embodiment, the pulse width of at least one of the first pulse and the second pulse is adjustable within a range of 0 to T / 2. For example, for the first upper switch Q1, the first cycle is the first pulse, the first pulse width is T / 2, and the second cycle is the second pulse, the second pulse width can be set to T / 4. In this embodiment, by limiting the pulse width, the maximum continuous on-time of each switch is limited to less than T / 2, which helps to promote the release of energy stored in parasitic inductance and capacitance.

[0048] In this embodiment, the width of the first pulse and the width of the second pulse corresponding to each switch tube can be the same or different, as long as the two switch tubes in the same coordinated switch tube group have overlapping conduction periods. This embodiment does not make any specific restrictions on the width of the first pulse and the width of the second pulse.

[0049] S103: Outputting a corresponding driving signal to each switch tube, so that each switch tube in the switch tube group forms a current closed loop during the overlapping conduction period, and outputs a target voltage from the voltage output terminal.

[0050] Still taking the above example as an example, the driving signals generated for the first upper switch tube Q1 and the second lower switch tube Q4 are as follows: Figure 3 As shown, Figure 3 In the first cycle, driven by their respective drive signals, the first upper switch Q1 and the second lower switch Q4 overlap in conduction for a period of T / 4. This overlap forms a closed current loop, allowing the target voltage to be output from the voltage output terminal. As can be seen, shortening the on-time of the switches increases the off-time ratio, providing more energy release windows for parasitic inductors and capacitors.

[0051] It can be seen that in this embodiment, each switching tube in the inverter unit is driven by a driving signal composed of a first pulse and a second pulse that alternate periodically. The width of at least one of the first pulse and the second pulse is adjustable and can be adjusted from 0 to T / 2, thereby shortening the continuous conduction time of each switching tube in each cycle, effectively reducing the conduction loss of the switching tube, and by limiting the maximum conduction time of a single pulse, it helps to promote the release of energy stored in parasitic inductance and capacitance, so that the switching power supply has higher robustness and stronger resistance to load mutations.

[0052] Based on the above embodiment:

[0053] In an exemplary embodiment, a process of outputting a corresponding driving signal to each switch tube so that each switch tube in the switch tube group forms a current closed loop during an overlapping conduction period and outputting a target voltage from the voltage output terminal includes:

[0054] In a single cycle, a first pulse and a second pulse are applied to each switch tube in the coordinated switch tube group, so that each switch tube in the coordinated switch tube group forms a current closed loop during the overlapping conduction period and outputs the target voltage from the voltage output terminal.

[0055] In this embodiment, when controlling the coordinated operation of two switching transistors in a coordinated switching transistor group, a first pulse and a second pulse are applied to the two switching transistors, respectively. This description uses the first coordinated switching transistor group (including the first upper switching transistor Q1 and the second lower switching transistor Q4) as an example. During a given cycle, the first pulse is applied to the first upper switching transistor Q1 and the second pulse is applied to the second lower switching transistor Q4, or the second pulse is applied to the first upper switching transistor Q1 and the first pulse is applied to the second lower switching transistor Q4. Because the switching transistors within the same coordinated switching transistor group use drive pulses of different widths in a single cycle, and because the upper switching transistor in the same bridge arm is turned on while the lower switching transistor is turned off, and vice versa, the on-time of the switching transistors within the same cycle is further reduced, thereby reducing the conduction losses of the switching transistors.

[0056] In an exemplary embodiment, the process of determining the driving signal for each switch in the switch group includes:

[0057] Determine the continuous on-time of each switch in the coordinated switch group in each cycle, wherein the continuous on-time of at least one switch is less than T / 2, and the continuous on-times of the switches in the coordinated switch group are different;

[0058] A driving signal for the switch tube is generated according to the continuous conduction time corresponding to the switch tube; the continuous conduction time corresponds to the width.

[0059] In this embodiment, the continuous on-time refers to the time that a switch tube remains in the on-state within a cycle. Within the same cycle, the continuous on-time of at least one of the two switch tubes in each coordinated switch tube group is less than T / 2, thereby shortening the switch tube on-time within the cycle and reducing the switch tube conduction loss. The continuous on-time of each switch tube corresponds to the pulse width. Based on the continuous on-time of each switch tube in different cycles, the first pulse and second pulse corresponding to the switch tube can be determined, and ultimately the corresponding drive signal for the switch tube can be determined. In this way, the on-time of each switch tube in the inverter circuit can be precisely controlled, thereby achieving effective regulation of the circuit output, such as controlling the magnitude and waveform of the output voltage.

[0060] In an exemplary embodiment, the process of generating a driving signal for a switch tube according to the continuous conduction time corresponding to the switch tube includes:

[0061] For each switch tube, determining a first continuous on-time of the switch tube in the i-th cycle and a second continuous on-time in the (i+1)-th cycle, and generating a driving signal for the switch tube according to the first continuous on-time and the second continuous on-time, where i is a positive integer;

[0062] The first continuous on-time and the second continuous on-time are different. The first continuous on-time corresponds to the width of the first pulse, and the second continuous on-time corresponds to the width of the second pulse.

[0063] In this embodiment, the driving signal is composed of a first pulse and a second pulse that alternate periodically, that is, the first continuous on-time and the second continuous on-time corresponding to the switch tube in two adjacent cycles (the i-th cycle and the (i+1)-th cycle) are different.

[0064] In an exemplary embodiment, the process of determining the continuous on-time of each switch in the coordinated switch group in each cycle includes:

[0065] Determine the third continuous on-time of the first switch tube in the coordinated switch tube group in the i-th cycle and the fourth continuous on-time of the second switch tube in the i-th cycle, the fourth continuous on-time is the same as the continuous on-time of the first switch tube in the i+1 cycle, and i is a positive integer.

[0066] It is understood that the first continuous on-time and the second continuous on-time corresponding to the same switch tube in different cycles may be different. In the same cycle, the third continuous on-time and the fourth continuous on-time corresponding to the two switches in the coordinated switch tube group may also be different. In this embodiment, the continuous on-time of the second switch tube in the coordinated switch tube group during the i-th cycle can be set equal to the continuous on-time of the first switch tube in the group during the i+1th cycle. Correspondingly, the continuous on-time of the first switch tube in the coordinated switch tube group during the i-th cycle can be set equal to the continuous on-time of the second switch tube in the group during the i+1th cycle. By alternating the on-times of the two switches in the coordinated switch tube group during adjacent cycles, it is possible to prevent a switch tube from being in a state of short or long on-time for a long period of time, thereby balancing the conduction losses of the two switches, preventing local overheating, and improving the stability and reliability of the circuit. For example, in a full-bridge inverter circuit, by symmetrically adjusting the on-times of the two switches, the voltage and current waveforms on the primary side of the transformer can be better balanced, harmonic distortion can be reduced, and the quality of the output AC power can be improved.

[0067] Reference Figure 3 As shown, the upper and lower switches of each bridge arm are alternately turned on with wide and narrow switching. The overlapping time of Q1, Q4 and Q2, Q3 forms a closed loop output, which can obtain the same Vab. The driving logic of Q1 to Q4 is as follows:

[0068] Driving logic of Q1: T / 2.0.t1.0.T / 2.0.t1.0.T / 2.0.t1.0.T / 2;

[0069] Q2 driving logic: 0.T / 2.0.t2.0.T / 2.0.t2.0.T / 2.0.t2.0;

[0070] Q3 driving logic: 0.t3.0.T / 2.0.t3.0.T / 2.0.t3.0.T / 2.0;

[0071] Q4 driving logic: t4.0.T / 2.0.t4.0.T / 2.0.t4.0.T / 2.0.t4.0.

[0072] Among them, T / 2 is the width of the first pulse (wide pulse) corresponding to each switching tube (which can also be understood as the continuous conduction time of the switching tube), t1, t2, t3, and t4 are the widths of the second pulse (narrow pulse) corresponding to each switching tube (which can also be understood as the continuous conduction time of the switching tube). t1, t2, t3, and t4 can be the same or different, and can be selected according to actual engineering needs. This embodiment does not limit this.

[0073] like Figure 4 As shown, in the wide-narrow wave PWM control method, when the Vab output is the largest, the continuous conduction time of Q1, Q2, Q3, and Q4 in each cycle is equal, which is completely equivalent to the phase-shift control method in the related art.

[0074] In summary, the wide- and narrow-wave PWM control method provided by the invention shortens the continuous on-time of each IGBT cycle, from 0 to T / 2. This reduces parasitic losses and improves power supply efficiency. This reduced on-time allows more time to release energy stored in parasitic inductance and capacitance, making the power supply more robust and more resistant to sudden load changes.

[0075] The present invention also provides a control system for a switching power supply. Figure 5 , the switching power supply control system includes:

[0076] A selection module 11 is configured to select at least two switching tubes from different bridge arms to form a coordinated switching tube group for each voltage output terminal;

[0077] a determination module 12, configured to determine a drive signal for each switching transistor in the switching transistor group, the drive signal comprising a first pulse and a second pulse that periodically alternate, the width of at least one of the first pulse and the second pulse being adjustable, the width of the first pulse and the width of the second pulse being less than or equal to T / 2, where T is the period;

[0078] The control module 13 is used to output a corresponding driving signal to each switch tube, so that each switch tube in the switch tube group forms a current closed loop during the overlapping conduction period and outputs the target voltage from the voltage output terminal.

[0079] In an exemplary embodiment, a process of outputting a corresponding driving signal to each switch tube so that each switch tube in the switch tube group forms a current closed loop during an overlapping conduction period and outputting a target voltage from the voltage output terminal includes:

[0080] In a single cycle, a first pulse and a second pulse are applied to each switch tube in the coordinated switch tube group, so that each switch tube in the coordinated switch tube group forms a current closed loop during the overlapping conduction period and outputs the target voltage from the voltage output terminal.

[0081] In an exemplary embodiment, the process of determining the driving signal for each switch in the switch group includes:

[0082] Determine the continuous on-time of each switch in the coordinated switch group in each cycle, wherein the continuous on-time of at least one switch is less than T / 2, and the continuous on-times of the switches in the coordinated switch group are different;

[0083] A driving signal for the switch tube is generated according to the continuous conduction time corresponding to the switch tube; the continuous conduction time corresponds to the width.

[0084] In an exemplary embodiment, the process of generating a driving signal for a switch tube according to the continuous conduction time corresponding to the switch tube includes:

[0085] For each switch tube, determining a first continuous on-time of the switch tube in the i-th cycle and a second continuous on-time in the (i+1)-th cycle, and generating a driving signal for the switch tube according to the first continuous on-time and the second continuous on-time, where i is a positive integer;

[0086] The first continuous on-time and the second continuous on-time are different. The first continuous on-time corresponds to the width of the first pulse, and the second continuous on-time corresponds to the width of the second pulse.

[0087] In an exemplary embodiment, for each voltage output terminal, the process of selecting at least two switching transistors from different bridge arms to form a coordinated switching transistor group includes:

[0088] For each voltage output end, two switching tubes are selected to form a coordinated switching tube group, and the two switching tubes are respectively located at the upper tube position and the lower tube position of different bridge arms.

[0089] In an exemplary embodiment, the process of determining the continuous on-time of each switch in the coordinated switch group in each cycle includes:

[0090] Determine the third continuous on-time of the first switch tube in the coordinated switch tube group in the i-th cycle and the fourth continuous on-time of the second switch tube in the i-th cycle, the fourth continuous on-time is the same as the continuous on-time of the first switch tube in the i+1 cycle, and i is a positive integer.

[0091] The embodiment of the present invention also provides an electronic device, please refer to Figure 6 , the electronic device comprises:

[0092] Memory 21, for storing computer programs;

[0093] The processor 22 is configured to implement the steps of any one of the above-mentioned methods for controlling a switching power supply when executing a computer program.

[0094] The electronic device also includes:

[0095] Input interface 23 is connected to processor 22 via communication bus 26 and is used to obtain externally imported computer programs, parameters, and instructions, and store them in memory 21 under the control of processor 22. This input interface can be connected to an input device to receive parameters or instructions manually input by the user. The input device can be a touch screen layer covering the display screen, or it can be a key, trackball, or touchpad provided on the terminal housing.

[0096] The display unit 24 is connected to the processor 22 via the communication bus 26 and is used to display data sent by the processor 22. The display unit can be a liquid crystal display or an electronic ink display.

[0097] The network port 25 is connected to the processor 22 via the communication bus 26 and is used to communicate with various external terminal devices. The communication technology used for the communication connection can be a wired communication technology or a wireless communication technology, such as mobile high-definition link technology, universal serial bus, high-definition multimedia interface, wireless fidelity technology, Bluetooth communication technology, low-power Bluetooth communication technology, communication technology based on IEEE802.11s, etc.

[0098] An embodiment of the present invention further provides a switching power supply, including an inverter unit and the electronic device as described above.

[0099] An embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the computer program implements the steps of any one of the above methods for controlling a switching power supply.

[0100] The computer-readable storage medium may include: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc., which can store program codes.

[0101] For an introduction to the switching power supply and its control system, electronic device, and computer-readable storage medium provided in the embodiments of the present invention, please refer to the above embodiments, and the present invention will not be described in detail here.

[0102] The switching power supply and its control system, electronic device, and computer-readable storage medium provided in the embodiments of the present invention have the same beneficial effects as the above-mentioned switching power supply control method.

[0103] It should also be noted that, in this specification, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0104] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling a switching power supply, wherein the switching power supply comprises an inverter unit, the inverter unit comprises at least two bridge arms, each of the bridge arms comprises two switching transistors, and a common terminal of the two switching transistors serves as a voltage output terminal of the inverter unit, wherein: The control methods of switching power supplies include: For each of the voltage output terminals, at least two of the switch tubes are selected from different bridge arms to form a coordinated switch tube group; Determining a drive signal for each of the switching transistors in the coordinated switching transistor group, wherein the drive signal includes a first pulse and a second pulse that periodically alternate, wherein the width of at least one of the first pulse and the second pulse is adjustable, and the width of the first pulse and the width of the second pulse are less than or equal to T / 2, where T is the period; A corresponding driving signal is output to each of the switch tubes, so that each of the switch tubes in the coordinated switch tube group forms a current closed loop during the overlapping conduction period, and outputs a target voltage from the voltage output terminal.

2. The control method of the switching power supply according to claim 1, characterized in that: The process of outputting a corresponding driving signal to each of the switch tubes so that each of the switch tubes in the coordinated switch tube group forms a current closed loop during an overlapping conduction period and outputting a target voltage from the voltage output terminal includes: In a single cycle, the first pulse and the second pulse are respectively applied to each switch tube in the coordinated switch tube group, so that each switch tube in the coordinated switch tube group forms a current closed loop during the overlapping conduction period and outputs the target voltage from the voltage output end.

3. The control method of the switching power supply according to claim 1, wherein: The process of determining the driving signal of each switching transistor in the coordinated switching transistor group includes: Determining the continuous on-time of each switch in the coordinated switch group in each cycle, where the continuous on-time of at least one switch is less than T / 2, and the continuous on-times of the switches in the coordinated switch group are different; A driving signal for the switch tube is generated according to a continuous conduction time corresponding to the switch tube; the continuous conduction time corresponds to the width.

4. The control method of the switching power supply according to claim 3, characterized in that: The process of generating a driving signal for the switch tube according to the continuous conduction time corresponding to the switch tube includes: For each of the switching transistors, determining a first continuous on-time of the switching transistor in an i-th cycle and a second continuous on-time of the switching transistor in an (i+1)-th cycle, and generating a driving signal for the switching transistor according to the first continuous on-time and the second continuous on-time, where i is a positive integer; The first continuous on-time and the second continuous on-time are different. The first continuous on-time corresponds to the width of the first pulse, and the second continuous on-time corresponds to the width of the second pulse.

5. The control method of the switching power supply according to claim 3, characterized in that: For each of the voltage output terminals, the process of selecting at least two of the switch tubes from different bridge arms to form a coordinated switch tube group includes: For each of the voltage output ends, two of the switch tubes are selected to form a coordinated switch tube group, and the two switch tubes are respectively located at the upper tube position and the lower tube position of different bridge arms.

6. The control method of the switching power supply according to claim 5, characterized in that: The process of determining the continuous conduction time of each switch tube in the coordinated switch tube group in each cycle includes: Determine a third continuous on-time of the first switch tube in the coordinated switch tube group in the i-th cycle and a fourth continuous on-time of the second switch tube in the i-th cycle, wherein the fourth continuous on-time and the continuous on-time are the same as the continuous on-time of the first switch tube in the i+1 cycle, where i is a positive integer.

7. A control system for a switching power supply, the switching power supply comprising an inverter unit, the inverter unit comprising at least two bridge arms, each of the bridge arms comprising two switching transistors, the common end of the two switching transistors serving as a voltage output end of the inverter unit, characterized in that: The control system of the switching power supply includes: A selection module, configured to select at least two of the switch tubes from different bridge arms to form a coordinated switch tube group for each of the voltage output terminals; a determination module, configured to determine a drive signal for each of the switching transistors in the coordinated switching transistor group, wherein the drive signal includes a first pulse and a second pulse that periodically alternate, wherein the width of at least one of the first pulse and the second pulse is adjustable, and the width of the first pulse and the width of the second pulse are less than or equal to T / 2, where T is the period; The control module is used to output a corresponding driving signal to each of the switch tubes, so that each of the switch tubes in the coordinated switch tube group forms a current closed loop during the overlapping conduction period and outputs the target voltage from the voltage output terminal.

8. An electronic device, characterized in that: include: Memory for storing computer programs; A processor, configured to implement the steps of the method for controlling a switching power supply according to any one of claims 1 to 6 when executing the computer program.

9. A switching power supply, characterized in that: The invention comprises an inverter unit and the electronic device as claimed in claim 8.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for controlling a switching power supply according to any one of claims 1 to 6 are implemented.

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