Power supply regulation circuit and method, power supply conversion circuit, and electronic equipment

Abstract

The present application discloses a power regulation circuit and method, a power conversion circuit, and an electronic device, wherein the power regulation circuit includes: an energy storage circuit, a power switch circuit, an isolation transformer, and a rectifier circuit, wherein the isolation transformer includes a primary winding and a secondary winding, and the rectifier circuit includes a rectifier switch subcircuit and a rectifier energy storage subcircuit; the energy storage circuit receives and uses a power input signal to obtain an energy storage current signal; the main control circuit obtains and uses the input voltage and energy storage current signal of the power input signal to generate a drive control signal; the power switch circuit receives and adjusts the energy storage current signal in response to the drive control signal, so that when the energy storage current signal increases, the DC isolation circuit resonates with the primary winding, and when the energy storage current signal decreases, the induced voltage of the secondary winding stores energy in the rectifier energy storage subcircuit. In the above manner, the power regulation circuit in the present application effectively simplifies the hardware circuit and improves the drive control reliability and efficiency.

Description

Technical Field

[0001] The present application relates to the field of power supply technology, and in particular to a power supply regulation circuit and method, a power supply conversion circuit, and an electronic device. Background Art

[0002] Nowadays, charging piles, as an important infrastructure for electric vehicles, have gradually become one of the hot research topics in recent years.

[0003] However, the charging pile power module circuit in the related technology usually adopts the form of a two-stage topology of PFC (Power Factor Correction) + DC-DC (direct current converter). However, due to the electrical isolation between the PFC side and the DC side, two microprocessors are usually required as the digital control center. The data interaction between the two microprocessors requires additional isolated communication circuits, such as serial communication circuits or high-speed SPI (Serial Peripheral Interface) circuits, etc. At the same time, it is also necessary to develop corresponding embedded communication programs to match the circuits, etc., which has high technical barriers, high manufacturing costs, large occupied volume, and complex control methods. Summary of the invention

[0004] The main technical problem solved by the present application is to provide a power regulation circuit and method, a power conversion circuit, and an electronic device, which can solve the problems of high technical threshold, high manufacturing cost, large occupied volume, and complex control method of the power regulation circuit in the prior art.

[0005] In order to solve the above technical problems, a technical solution adopted by the present application is: to provide a power supply regulation circuit, wherein the power supply regulation circuit includes: an energy storage circuit, which is used to couple with the power supply circuit, and the energy storage circuit is configured to receive the power supply input signal sent by the power supply circuit, so as to obtain the energy storage current signal by using the power supply input signal; a power switch circuit, which is coupled to the energy storage circuit; a DC isolation circuit, which is coupled to the power switch circuit; an isolation transformer, which includes a primary winding and a secondary winding, and the primary winding is coupled to the power switch circuit and the DC isolation circuit, and is coupled to the secondary winding; a rectifier circuit, which includes a rectifier switch sub-circuit and a rectifier energy storage sub-circuit, and the rectifier switch sub-circuit is coupled to the secondary winding and the rectifier energy storage subcircuit; a main control circuit, coupling the energy storage circuit and the power switch circuit, the main control circuit is configured to obtain the input voltage and energy storage current signal of the power input signal in the energy storage circuit, so as to generate a drive control signal using the input voltage and the energy storage current signal; wherein the power switch circuit is configured to receive the drive control signal sent by the main control circuit, and to change the switch state in response to the drive control signal to adjust the energy storage current signal, so that when the energy storage current signal increases, the DC isolation circuit and the primary winding resonate through the power switch circuit, and when the energy storage current signal decreases, the induced voltage obtained by coupling the secondary winding and the primary winding is used to store energy in the rectifier energy storage subcircuit through the rectifier switch subcircuit.

[0006] Wherein, the power switch circuit includes a first power switch subcircuit, a second power switch subcircuit, a first switch subcircuit and a second switch subcircuit, the first power switch subcircuit is coupled to the energy storage circuit, the second power switch subcircuit, the first switch subcircuit and the main control circuit, the second power switch subcircuit is coupled to the second switch subcircuit and the main control circuit, the first switch subcircuit is coupled to the second switch subcircuit and the DC isolation circuit, and the second switch subcircuit is coupled to the primary winding; wherein the drive control signal includes a first control signal and a second control signal, and the main control circuit is configured to adjust the first control signal to a first level when the input voltage is a positive voltage, and adjust the second control signal to a first level when the energy storage current signal passes zero from a positive direction, so as to adjust the energy storage current signal to a first level when the energy storage current signal is greater than or equal to a set When the current threshold is set, the second control signal is adjusted from the first level to the second level; the main control circuit is used to adjust the second control signal to the first level when the input voltage is a negative voltage, and adjust the first control signal to the first level when the energy storage current signal passes through zero from a negative direction, so as to adjust the first control signal from the first level to the second level when the energy storage current signal is greater than or equal to the set current threshold; wherein the first power switch subcircuit is configured to receive the first control signal to trigger conduction when the first control signal is a first level, and trigger shutdown when the first control signal is a second level; the second power switch subcircuit is configured to receive the second control signal to trigger conduction when the second control signal is a first level, and trigger shutdown when the second control signal is a second level.

[0007] Among them, the first switch sub-circuit includes a first switch tube, the second switch sub-circuit includes a second switch tube, and the rectifier switch sub-circuit includes a third switch tube; wherein the first switch tube and the second switch tube have the same device type and are both three-electrode switch tubes or diodes, and the third switch tube is a three-electrode switch tube or diode.

[0008] Wherein, when the first switch tube and the second switch tube are three-electrode switch tubes, the main control circuit is configured to generate a third control signal and a fourth control signal using the input voltage and the energy storage current signal, and when the input voltage is a positive voltage, the third control signal is adjusted to the second level and the fourth control signal is adjusted to the first level; when the input voltage is a negative voltage, the third control signal is adjusted to the first level and the fourth control signal is adjusted to the second level; wherein the first switch tube is configured to receive the third control signal to trigger conduction when the third control signal is the first level, and to trigger shutdown when the third control signal is the second level; the second switch tube is configured to receive the fourth control signal to trigger conduction when the fourth control signal is the first level, and to trigger shutdown when the fourth control signal is the second level; and / or, when the third switch tube is a three-electrode switch tube, the main control circuit is configured to generate a fifth control signal using the first control signal and the second control signal, so that when the input voltage is a positive voltage, the fifth control signal is adjusted to be in phase with the second control signal, and when the input voltage is a negative voltage, the fifth control signal is adjusted to be in phase with the first control signal.

[0009] Among them, the number of isolation transformers is at least two, the first end of each primary winding is coupled to the DC isolation circuit, the second end of each primary winding is coupled to the second switch sub-circuit, each secondary winding is connected in series in sequence, and coupled to the rectifier switch sub-circuit and the rectifier energy storage sub-circuit; or, each primary winding is connected in series in sequence, and coupled to the DC isolation circuit and the second switch sub-circuit.

[0010] Among them, the number of DC isolation circuits, isolation transformers, rectifier switch sub-circuits and rectifier energy storage sub-circuits is equal and each is at least two; wherein the first end of each DC isolation circuit is coupled to the first switch sub-circuit, the second end of each DC isolation circuit is coupled to the first end of a primary winding, and the second end of each primary winding is coupled to the second switch sub-circuit; the first end of each secondary winding is coupled to the first end of a rectifier switch sub-circuit, the second ends of each secondary winding are coupled to each other and to the second end of each rectifier energy storage sub-circuit, the second ends of each rectifier switch sub-circuit are coupled to each other and to the first end of each rectifier energy storage sub-circuit; or, each secondary winding and each rectifier switch sub-circuit are connected in series in sequence and coupled to each rectifier energy storage sub-circuit.

[0011] The energy storage circuit includes an energy storage inductor, the first power switch subcircuit includes a first power switch tube, the second power switch subcircuit includes a second power switch tube, the first switch subcircuit includes a first switch tube, the second switch subcircuit includes a second switch tube, the DC isolation circuit includes a first capacitor, the rectifier switch subcircuit includes a third switch tube, and the rectifier energy storage subcircuit includes a second capacitor; wherein the first end of the energy storage inductor is used to couple with the first end of the power supply circuit, the second end of the energy storage inductor is coupled to the second end of the first power switch tube and the third end of the second power switch tube, and the third end of the first power switch tube is coupled to the first The second end of the switch tube and the first end of the first capacitor, the first end of the first switch tube is coupled to the second end of the second switch tube and is used to couple with the second end of the power supply circuit, the second end of the first capacitor is coupled to the first end of the primary winding, the second end of the second power switch tube is coupled to the first end of the second switch tube and the second end of the primary winding, the first end of the secondary winding is coupled to the first end of the third switch tube, the second end of the third switch tube is coupled to the first end of the second capacitor and is used to couple with the first end of the back-end signal circuit, the second end of the secondary winding is coupled to the first end of the second capacitor and is used to couple with the second end of the back-end signal circuit.

[0012] In order to solve the above technical problems, another technical solution adopted in the present application is: to provide a power supply regulation method, which is applied to the power supply regulation circuit as described in any of the above items, wherein the power supply regulation method includes: receiving a power supply input signal sent by the power supply circuit; using the power supply input signal to adjust the energy storage current signal; using the input voltage of the power supply input signal and the energy storage current signal to generate a drive control signal; and using the drive control signal to adjust the energy storage current signal.

[0013] In order to solve the above technical problems, another technical solution adopted in the present application is: to provide a power conversion circuit, wherein the power conversion circuit includes at least two power regulation circuits, and the output ends of each power regulation circuit are connected in series or in parallel with each other; wherein the power regulation circuit is a power regulation circuit as described in any of the above items.

[0014] To solve the above technical problems, another technical solution adopted in the present application is: to provide an electronic device, wherein the electronic device includes a shell and a functional integrated circuit coupled to each other; wherein the functional integrated circuit is a power regulation circuit as described in any one of the above items, or a power conversion circuit as described above.

[0015] The beneficial effects of the present application are as follows: different from the prior art, the energy storage circuit in the power supply regulation circuit provided by the present application is used to receive and use the power supply input signal to obtain the energy storage current signal; the main control circuit is used to obtain and use the input voltage of the power supply input signal and the energy storage current signal to generate a drive control signal; the power switch circuit receives and adjusts the energy storage current signal in response to the drive control signal, so that when the energy storage current signal increases, the DC isolation circuit and the primary winding resonate through the power switch circuit, and when the energy storage current signal decreases, the induced voltage obtained by coupling the secondary winding with the primary winding stores energy in the rectifier energy storage subcircuit, so that a main control circuit can be effectively used to realize power supply regulation control, and the primary winding and the secondary winding are used to perform corresponding resonance and coupling according to the size of the energy storage current signal to effectively realize electrical isolation and power transmission to meet the power supply demand, which also effectively simplifies the device configuration and its occupied space, simplifies the circuit control method, improves the drive control reliability and efficiency, and thus reduces the technical threshold. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0017] Figure 1 It is a structural schematic diagram of the first embodiment of the power supply regulation circuit of the present application;

[0018] Figure 2 It is a structural schematic diagram of a second embodiment of the power supply regulating circuit of the present application;

[0019] Figure 3 yes Figure 2 Schematic diagram of waveforms of various signals corresponding to the power supply regulation circuit;

[0020] Figure 4 It is a structural schematic diagram of a third embodiment of the power supply regulating circuit of the present application;

[0021] Figure 5 is a structural schematic diagram of a fourth embodiment of the power supply regulating circuit of the present application;

[0022] Figure 6 is a structural schematic diagram of a fifth embodiment of the power supply regulation circuit of the present application;

[0023] Figure 7 It is a flowchart of the first embodiment of the power supply regulation method of the present application;

[0024] Figure 8It is a structural schematic diagram of an implementation mode of a power conversion circuit of the present application;

[0025] Fig. 9 It is a schematic structural diagram of an embodiment of an electronic device of the present application. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, 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 creative work are within the scope of protection of this application.

[0027] The terms "first", "second" and "third" in this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second" and "third" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. All directional indications (such as up, down, left, right, front, back...) in the implementation mode of this application are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0028] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0029] The present application is described in detail below with reference to the accompanying drawings and implementation methods.

[0030] See also Figure 1 , Figure 11 is a schematic diagram of the structure of the first embodiment of the power supply regulation circuit of the present application. In this embodiment, the first power supply regulation circuit 10 specifically includes: a first energy storage circuit 11, a first power switch circuit 12, a first DC blocking circuit 13, a first isolation transformer 14, a first rectifier circuit 15 and a first main control circuit 16.

[0031] Among them, a first power supply regulating circuit 10 provided in the present application is specifically used in electronic devices with power supply regulation and conversion requirements, such as DC charging piles, photovoltaic charging equipment, and mobile energy storage equipment, to receive input from an external power supply and perform voltage conversion on the power supply input, thereby meeting the requirements of signal functions such as charging and energy storage. Of course, in other embodiments, the first power supply regulating circuit 10 can also be specifically set in any other reasonable electronic device such as an industrial robot, a drone, etc., and this embodiment does not limit this.

[0032] Specifically, the first energy storage circuit 11 is used to couple with the external power supply circuit 101 to receive the power input signal from the power supply circuit 101, and use the power input signal to charge and store energy, or discharge and release energy to obtain an energy storage current signal.

[0033] It is worth noting that the power supply circuit 101 can specifically be a battery with DC output, a DC voltage regulator, a photovoltaic power supply, an energy storage power supply, or any reasonable DC or AC power supply such as a grid power supply, a photovoltaic power supply, an independent generator, etc., or it can be a first power supply regulation circuit 10 that receives and converts and regulates the grid power supply, photovoltaic power supply, an independent generator or other any reasonable upper power supply to obtain a DC or AC power supply output. This embodiment does not limit this.

[0034] In addition, the term "coupled" herein refers to any direct and indirect connection means. Therefore, if the first circuit is described as being coupled to the second circuit, it means that the first circuit can be directly connected to the second circuit through electrical connection or signal connection methods such as wireless transmission, optical transmission, etc., or can be indirectly connected to the second circuit through other circuits or connection means.

[0035] Among them, the first power switch circuit 12 is coupled to the first energy storage circuit 11, and the first DC isolation circuit 13 is coupled to the first power switch circuit 12. The first power switch circuit 12 is used to receive the energy storage current signal sent by the first energy storage circuit 11, and use its internal switching action mechanism, such as the opening and closing action mechanism of switching devices such as IGBT (Insulated Gate Bipolar Transistor), high-frequency transistor, MOS (Metal Oxide Semiconductor Field Effect Transistor), etc., under the action of the driving control signal, cooperate with the first DC isolation circuit 13 to adjust and transform the voltage of the energy storage current signal.

[0036] The first isolation transformer 14 specifically further includes a first primary winding 141 and a first secondary winding 142. The first primary winding 141 is coupled to the first power switch circuit 12 and the first DC isolation circuit 13, and is coupled to the first secondary winding 142 to achieve electrical isolation and voltage matching functions. While isolating the circuits on the primary and secondary sides to avoid a large amount of harmonic pollution caused by the power supply circuit 101, the first primary winding 141 can also be used to resonate with the first DC isolation circuit 13.

[0037] The first rectifier circuit 15 specifically further includes a first rectifier switch sub-circuit 151 and a first rectifier energy storage sub-circuit 152. The first rectifier switch sub-circuit 151 is coupled to the first secondary winding 142 and the first rectifier energy storage sub-circuit 152 to receive the induced electrical signal obtained by coupling the first secondary winding 142 with the first primary winding 141, and cooperate with the first rectifier energy storage sub-circuit 152 to charge and store energy, or discharge and release energy to rectify the induced electrical signal to obtain a power supply output signal for providing to the back-end signal circuit.

[0038] It is worth noting that the back-end signal circuit can specifically be a load circuit that uses the power supply output signal to work, or it can be a lower-level circuit that uses the power supply output signal to achieve current conversion, frequency regulation and other any other reasonable signal functions, and this application does not limit this.

[0039] The first main control circuit 16 is coupled to the first energy storage circuit 11 and the first power switching circuit 12. The first main control circuit 16 is used to obtain the input voltage and energy storage current signal of the power input signal from the first energy storage circuit 11, so as to generate a drive control signal using the input voltage and the energy storage current signal. For example, a drive control signal is generated according to the characteristics such as whether the input voltage is in the positive or negative half cycle, whether the energy storage current signal decreases from positive to zero or from negative to zero, and whether the energy storage current signal is less than a set current threshold.

[0040] The first power switch circuit 12 is specifically used to receive the drive control signal sent by the first main control circuit 16, and change the switch state in response to the drive control signal, such as triggering the internal switch device to turn on or off, so as to adjust the energy storage current signal.

[0041] When the energy storage current signal in the first energy storage circuit 11 increases, the first DC isolation circuit 13 resonates with the first primary winding 141 through the first power switch circuit 12 which is in the current switching state, that is, the switching state in which the energy storage current signal begins to increase; and when the energy storage current signal gradually decreases, the induced voltage obtained by coupling the first secondary winding 142 with the first primary winding 141 will store energy in the first rectifying energy storage sub-circuit 152 through the first rectifying switch sub-circuit 151 to obtain a power supply output signal.

[0042] The above scheme realizes power regulation control by utilizing a first main control circuit 16, and utilizes the first primary winding 141 and the first secondary winding 142 to perform corresponding resonance and coupling according to the size of the energy storage current signal to effectively realize electrical isolation and power transfer to meet the power supply requirements, effectively simplify the device configuration and its occupied space, and simplify the circuit control method, thereby improving the drive control reliability and efficiency, and thus lowering the technical threshold.

[0043] In some embodiments, the drive control signal may specifically be one or more of any reasonable control signals such as a PWM (Pulse Width Modulation) signal or a PFM (Pulse Frequency Modulation) signal, and the present application does not limit this.

[0044] In some embodiments, the first main control circuit 16 may specifically include a control chip, an MCU (MicroController Unit) circuit, a CPU (Central Processing Unit), a single-chip microcomputer, a field programmable gate array, a programmable logic device, a discrete gate or transistor logic device, discrete hardware, or any other reasonable circuit unit with a signal processing function, and the present application does not limit this.

[0045] See also Figure 2 , Figure 21 is a schematic diagram of the structure of the second embodiment of the power supply regulation circuit of the present application. The difference between the power supply regulation circuit in this embodiment and the first embodiment of the power supply regulation circuit provided in the present application is that the second power switch circuit 22 in the second power supply regulation circuit 20 further includes a second example first power switch sub-circuit 221, a second example second power switch sub-circuit 222, a second example first switch sub-circuit 223 and a second example second switch sub-circuit 224.

[0046] Specifically, the second example first power switch sub-circuit 221 is coupled to the second energy storage circuit 21, the second example second power switch sub-circuit 222, the second example first switch sub-circuit 223 and the second main control circuit 26, the second example second power switch sub-circuit 222 is coupled to the second example second switch sub-circuit 224 and the second main control circuit 26, the second example first switch sub-circuit 223 is coupled to the second example second switch sub-circuit 224 and the second DC isolation circuit 23, and the second example second switch sub-circuit 224 is coupled to the second primary winding 241 of the second isolation transformer 24.

[0047] Please continue reading Figure 3 , Figure 3 yes Figure 2 Schematic diagram of the waveforms of various signals corresponding to the power supply regulation circuit.

[0048] It can be understood that the drive control signal further includes a first control signal PWM1 and a second control signal PWM2; and the power input signal is specifically an AC input signal, that is, the waveform of the power input signal input voltage Vin corresponds to a sine wave; and the energy storage current signal I L It also corresponds to an AC signal, and its signal frequency is greater than the signal frequency of the power input signal.

[0049] The second main control circuit 26 is specifically used to adjust and set the first control signal PWM1 to the first level when the input voltage Vin of the power input signal is a positive voltage, that is, when the input voltage Vin is in the positive half cycle, and respond to the energy storage current signal I in the second energy storage circuit 21. L When the forward current passes zero, that is, when the forward current decreases to zero, the second control signal PWM2 is adjusted to the first level, and the energy storage current signal I L When the current level gradually increases to be greater than or equal to the set current threshold, the second control signal PWM2 is adjusted from the first level to the second level.

[0050] The second main control circuit 26 is also used for adjusting and setting the second control signal PWM2 to the first level when the input voltage Vin is a negative voltage, that is, when the input voltage Vin is in the positive half cycle, and LWhen the current passes through zero in the negative direction, that is, when the current increases from the negative direction to zero, the first control signal PWM1 is adjusted to the first level, and the energy storage current signal I L When the current level gradually increases to be greater than or equal to the set current threshold, the first control signal PWM1 is adjusted from the first level to the second level.

[0051] Among them, the second example first power switch sub-circuit 221 is specifically used to receive the first control signal PWM1, so as to trigger conduction when the first control signal PWM1 is at the first level, and trigger shutdown when the first control signal PWM1 is at the second level; the second example second power switch sub-circuit 222 is configured to receive the second control signal PWM2, so as to trigger conduction when the second control signal PWM2 is at the first level, and trigger shutdown when the second control signal PWM2 is at the second level.

[0052] It can be seen that when the input voltage Vin is in the positive half cycle, the first power switch sub-circuit 221 of the second example will continue to be turned on. L When the forward current decreases to zero, the second power switch subcircuit 222 of the second example is triggered to turn on. At this time, the input voltage Vin will charge the second energy storage circuit 21 through the second power switch subcircuit 222 and the second switch subcircuit 224 of the second example. The energy storage current signal I L will begin to increase, and at the same time, the second DC isolation circuit 23 and the second primary winding 241 will begin to resonate through the second first power switch sub-circuit 221 and the second second power switch sub-circuit 222; and when the energy storage current signal I L When the current increases to be greater than or equal to the set current threshold, the second power switch subcircuit 222 of the second example is triggered to shut down, and the second energy storage circuit 21 will continue to flow through the second first power switch subcircuit 221, the second DC blocking circuit 23, the second primary winding 241 and the second second switch subcircuit 224 of the second example. L The inductive voltage on the second secondary winding 242 will gradually decrease, and at the same time, the inductive voltage on the second secondary winding 242 will start to charge the second rectifying energy storage sub-circuit 252 through the second rectifying switch sub-circuit 251 in the second rectifying circuit 25.

[0053] Similarly, when the input voltage Vin is in the negative half cycle, the second power switch sub-circuit 222 of the second example will continue to be turned on. L When the forward current decreases to zero, the second example first power switch subcircuit 221 is triggered to turn on. At this time, the input voltage Vin will charge the second energy storage circuit 21 through the second example first power switch subcircuit 221 and the second example first switch subcircuit 223. The energy storage current signal I Lwill begin to increase, and at the same time, the second DC isolation circuit 23 and the second primary winding 241 will begin to resonate through the second first power switch sub-circuit 221 and the second second power switch sub-circuit 222; and when the energy storage current signal I L When the current increases to be greater than or equal to the set current threshold, the second example first power switch sub-circuit 221 is triggered to shut down, and the second energy storage circuit 21 will continue to flow through the second example second power switch sub-circuit 222, the second DC blocking circuit 23, the second primary winding 241 and the second example first switch sub-circuit 223. L The voltage of the induction voltage on the second secondary winding 242 will gradually decrease, and at the same time, the induction voltage on the second secondary winding 242 will start to charge the second rectifying energy storage sub-circuit 252 through the second rectifying switch sub-circuit 251 to obtain the power supply output signal Vo.

[0054] In one embodiment, the second example first switch sub-circuit 223 specifically includes a first switch tube (not shown in the figure), the second example second switch sub-circuit 224 includes a second switch tube (not shown in the figure), and the second rectifier switch sub-circuit 251 includes a third switch tube (not shown in the figure); wherein, the first switch tube and the second switch tube are of the same device type and are both three-electrode switch tubes or diodes, and the third switch tube is a three-electrode switch tube or diode.

[0055] Furthermore, in some embodiments, the three-electrode switch tube can be any reasonable switch device such as a MOS tube, a high-frequency transistor, a triode, a thyristor, an IGBT, etc., and the present application does not limit this.

[0056] And the first end of the three-electrode switch tube corresponds to the control end, so that when the first end of the three-electrode switch tube receives a corresponding driving control signal, the second end and the third end thereof will be triggered to turn on or off under the action of the driving control signal.

[0057] In one embodiment, the first switch tube and the second switch tube can be specifically a three-electrode switch tube, and the drive control signal specifically includes a third control signal and a fourth control signal, that is, the second main control circuit 26 is also used to use the input voltage Vin of the power input signal and the energy storage current signal I L Generate a third control signal and a fourth control signal, and specifically, when the input voltage Vin is a positive voltage, adjust the third control signal to the second level and adjust the fourth control signal to the first level; and when the input voltage Vin is a negative voltage, adjust the third control signal to the first level and adjust the fourth control signal to the second level.

[0058] Among them, the first switch tube is used to receive a third control signal to trigger conduction when the third control signal is a first level, and to trigger shutdown when the third control signal is a second level; the second switch tube is used to receive a fourth control signal to trigger conduction when the fourth control signal is a first level, and to trigger shutdown when the fourth control signal is a second level.

[0059] It can be seen that when the input voltage Vin is in the positive half cycle, the first switch tube will continue to remain closed, and the second switch tube will continue to remain on, so as to cooperate with the switching actions of the second example first power switch sub-circuit 221 and the second example second power switch sub-circuit 222 to charge the second energy storage circuit 21 using the input voltage Vin; or make the second DC isolation circuit 23 resonate with the second primary winding 241; or make the second energy storage circuit 21 continue to flow through the second DC isolation circuit 23, the second primary winding 241 and the second example second switch sub-circuit 224, and at the same time, the induced voltage on the second secondary winding 242 starts to charge the second rectification energy storage sub-circuit 252 through the second rectification switch sub-circuit 251.

[0060] When the input voltage Vin is in the negative half cycle, the second switch tube will continue to remain closed, and the first switch tube will continue to remain turned on, so as to cooperate with the switching actions of the second example first power switch sub-circuit 221 and the second example second power switch sub-circuit 222 to charge the second energy storage circuit 21 using the input voltage Vin; or make the second DC isolation circuit 23 resonate with the second primary winding 241; or make the second energy storage circuit 21 continue to flow through the second DC isolation circuit 23, the second primary winding 241 and the second example second switch sub-circuit 224, and at the same time, the induced voltage on the second secondary winding 242 starts to charge the second rectification energy storage sub-circuit 252 through the second rectification switch sub-circuit 251.

[0061] It is understandable that, compared with the first switch tube and the second switch tube being diodes, when they are replaced with three-electrode switch tubes, the efficiency of the second power supply regulating circuit 20 will be effectively improved.

[0062] In one embodiment, the third switch tube can be specifically a three-electrode switch tube, and the drive control signal specifically also includes a fifth control signal. The second main control circuit 26 is also used to generate a fifth control signal corresponding to the first control signal PWM1 and the second control signal PWM2, and specifically when the input voltage Vin of the power input signal is a positive voltage, the fifth control signal is adjusted to be in phase with the second control signal PWM2, that is, in the positive half cycle of the input voltage Vin, the second control signal PWM2 is copied to obtain the fifth control signal, and the fifth control signal is made the same as the second control signal PWM2, and when the input voltage Vin is a negative voltage, the fifth control signal is adjusted to be in phase with the first control signal PWM1, that is, the fifth control signal is made the same as the first control signal PWM1.

[0063] See also Figure 4 , Figure 4 The power supply regulating circuit in this embodiment differs from the power supply regulating circuit in the second embodiment provided in this application in that the third energy storage circuit 31 in the third power supply regulating circuit 30 specifically includes an energy storage inductor Lr.

[0064] Specifically, the third example first power switch sub-circuit 321 in the third power switch circuit 32 includes a first power switch tube QG1, the third example second power switch sub-circuit 322 includes a second power switch tube QG2, the third example first switch sub-circuit 323 includes a first switch tube Q1, the third example second switch sub-circuit 324 includes a second switch tube Q2, the third DC isolation circuit 33 includes a first capacitor C1, the third rectifier switch sub-circuit 351 in the third rectifier circuit 35 includes a third switch tube Q3, and the third rectifier energy storage sub-circuit 352 includes a second capacitor C2.

[0065] Among them, the first end of the energy storage inductor Lr is used to couple with the first end of the power supply circuit 101, the second end of the energy storage inductor Lr is coupled to the second end of the first power switch tube QG1 and the third end of the second power switch tube QG2, the third end of the first power switch tube QG1 is coupled to the second end of the first switch tube Q1 and the first end of the first capacitor C1, the first end of the first switch tube Q1 is coupled to the second end of the second switch tube Q2, and is used to couple with the second end of the power supply circuit 101, the second end of the first capacitor C1 is coupled to the first end of the third primary winding 341 in the third isolation transformer 34, the second end of the second power switch tube QG2 is coupled to the first end of the second switch tube Q2 and the second end of the third primary winding 341, the first end of the third secondary winding 342 is coupled to the first end of the third switch tube Q3, the second end of the third switch tube Q3 is coupled to the first end of the second capacitor C2, and is used to couple with the first end of the back-end signal circuit, and the second end of the third secondary winding 342 is coupled to the first end of the second capacitor C2, and is used to couple with the second end of the back-end signal circuit.

[0066] In some embodiments, the first power switch tube QG1 and the third example second power switch sub-circuit 322 may be any reasonable switch device such as a MOS tube, a high-frequency transistor, an IGBT, etc., and this application does not limit this.

[0067] In some embodiments, the third rectifier switch subcircuit 351 can also be a half-bridge or full-bridge rectifier conversion circuit composed of a diode or a three-electrode switch tube, which is determined by the actual application scenario and is not limited in this application.

[0068] In some embodiments, the third main control circuit 36 ​​may further include a third current sampling subcircuit 361, a third voltage sampling subcircuit 362, and a third control subcircuit 363; wherein the third current sampling subcircuit 361 is coupled to the third energy storage circuit 31 and the third control subcircuit 363, so as to sample and obtain the energy storage current signal I from the third energy storage circuit 31. L , and the energy storage current signal I L After filtering, the third voltage sampling subcircuit 362 is output to the third control subcircuit 363; the third voltage sampling subcircuit 362 is coupled to the third energy storage circuit 31 and the third control subcircuit 363, so as to sample and obtain the input voltage Vin of the power input signal from the third energy storage circuit 31, and after filtering the input voltage Vin, output it to the third control subcircuit 363; the third control subcircuit 363 is used to utilize the input voltage Vin and the energy storage current signal I L Generates a drive control signal.

[0069] In one embodiment, the third rectifying energy storage sub-circuit 352 specifically also includes an output resistor Ro, a first end of the output resistor Ro is coupled to the first end of the second capacitor C2, and a second end of the output resistor Ro is coupled to the second end of the second capacitor C2, so as to cooperate with the second capacitor C2 to output a stable power supply output signal Vo to the back-end signal circuit.

[0070] See also Figure 5 , Figure 5 The power regulation circuit in this embodiment differs from the power regulation circuit in the third embodiment provided in this application in that the number of the fourth isolation transformers 44 in the fourth power regulation circuit 40 is at least two.

[0071] Among them, the first end of each fourth primary winding 441 is coupled to the fourth DC isolation circuit 43, the second end of each fourth primary winding 441 is coupled to the fourth second switch sub-circuit 424, and each fourth secondary winding 442 is connected in series in sequence, and coupled to the fourth rectifier switch sub-circuit 451 and the fourth rectifier energy storage sub-circuit 452, so that by connecting each fourth primary winding 441 in parallel and each fourth secondary winding 442 in series, when the output current of the power supply output signal Vo is the same, its output voltage can be doubled to improve the output power of the fourth power supply regulation circuit 40 and the charging efficiency of the corresponding load, thereby effectively expanding its application range.

[0072] In other embodiments, the first end of each fourth primary winding 441 in at least two fourth isolation transformers 44 can also be coupled to the fourth DC isolation circuit 43, the second end of each fourth primary winding 441 is coupled to the fourth second switch sub-circuit 424, and each fourth primary winding 441 is connected in series in sequence and coupled to the fourth DC isolation circuit 43 and the fourth second switch sub-circuit 424, so that each fourth primary winding 441 is connected in parallel, and each fourth secondary winding 442 is also connected in parallel. When the output voltage of the power supply output signal Vo is the same, its output current is doubled to improve the output power of the fourth power supply regulation circuit 40 and the charging efficiency of the corresponding load, thereby effectively expanding its application range.

[0073] It is worth mentioning that both series connection and parallel connection are a way of connecting circuit components. 1. Series circuit: A circuit formed by connecting circuit components (such as resistors, capacitors, inductors, electrical appliances, etc.) one by one in sequence, and connecting each electrical appliance in series. 2. Parallel circuit: A way of connecting two components, devices, etc. of the same or different types, head to head and tail to tail, usually used to refer to the connection method of electronic components in a circuit.

[0074] It can be understood that the fourth energy storage circuit 41, the fourth power switch circuit 42, the fourth example of the first power switch sub-circuit 421, the fourth example of the second power switch sub-circuit 422, the fourth example of the first switch sub-circuit 423, the fourth example of the second switch sub-circuit 424, the fourth DC blocking circuit 43, the fourth rectifier circuit 45, the fourth rectifier switch sub-circuit 451, the fourth rectifier energy storage sub-circuit 452, the fourth main control circuit 46, the fourth current sampling sub-circuit 461, the fourth voltage sampling sub-circuit 462 and the fourth control sub-circuit 46 in this embodiment 3 are respectively the same as the third energy storage circuit 31, the third power switch circuit 32, the third example first power switch sub-circuit 321, the third example second power switch sub-circuit 322, the third example first switch sub-circuit 323, the third example second switch sub-circuit 324, the third DC blocking circuit 33, the third rectifier circuit 35, the third rectifier switch sub-circuit 351, the third rectifier energy storage sub-circuit 352, the third main control circuit 36, the third current sampling sub-circuit 361, the third voltage sampling sub-circuit 362 and the third control sub-circuit 363, for details, please refer to Figure 4 And the related text content will not be repeated here.

[0075] See also Figure 6 , Figure 6 1 is a schematic diagram of the structure of the fifth embodiment of the power supply regulation circuit of the present application. The power supply regulation circuit in this embodiment is different from the third embodiment of the power supply regulation circuit provided in the present application in that the number of the fifth DC blocking circuit 53, the fifth isolation transformer 54, and the fifth rectifier circuit 55 in the fifth power supply regulation circuit 50 is equal and at least two.

[0076] Among them, the first end of each fifth DC isolation circuit 53 is coupled to the fifth example first switch sub-circuit 523, the second end of each fifth DC isolation circuit 53 is coupled to the first end of a fifth primary winding 541, and the second end of each fifth primary winding 541 is coupled to the fifth example second switch sub-circuit 524; and the first end of each fifth secondary winding 542 is coupled to the first end of a fifth rectifier switch sub-circuit 551, the second end of each fifth secondary winding 542 is coupled to each other and to the second end of each fifth rectifier energy storage sub-circuit 552, and the second end of each fifth rectifier switch sub-circuit 551 is coupled to each other and to the first end of each fifth rectifier energy storage sub-circuit 552. One end is coupled so that each fifth primary winding 541 is connected in parallel through each fifth DC isolation circuit 53, and each fifth secondary winding 542 is also connected in parallel through each fifth rectifier switch sub-circuit 551, and is connected in parallel with each fifth rectifier energy storage sub-circuit 552. When the output voltage of the power supply output signal Vo is the same, its output current is doubled to improve the output power of the fifth power supply regulation circuit 50 and the charging efficiency of the corresponding load, and the fifth DC isolation circuit 53, the fifth rectifier switch sub-circuit 551 and the fifth rectifier energy storage sub-circuit 552 are used to effectively improve the power supply stability and reliability of the fifth power supply regulation circuit 50, thereby effectively expanding its application range.

[0077] In other embodiments, each of the fifth secondary windings 542 and each of the fifth rectifying switch sub-circuit 551 can be specifically connected in series in sequence, and coupled to each of the fifth rectifying energy storage sub-circuit 552, so that each of the fifth primary windings 541 is connected in parallel through each of the fifth DC isolation circuits 53, and each of the fifth secondary windings 542 is connected in series through each of the fifth rectifying switch sub-circuits 551, and is connected in parallel with each of the fifth rectifying energy storage sub-circuits 552. When the output current of the power supply output signal Vo is the same, its output voltage is doubled to improve the output power of the fifth power supply regulation circuit 50 and the charging efficiency of the corresponding load, and the fifth DC isolation circuits 53, the fifth rectifying switch sub-circuit 551 and the fifth rectifying energy storage sub-circuit 552 are utilized to effectively improve the power supply stability and reliability of the fifth power supply regulation circuit 50, thereby effectively broadening its scope of application.

[0078] It can be understood that the fifth energy storage circuit 51, the fifth power switch circuit 52, the fifth example first power switch sub-circuit 521, the fifth example second power switch sub-circuit 522, the fifth example first switch sub-circuit 523, the fifth example second switch sub-circuit 524, the fifth main control circuit 56, the fifth current sampling sub-circuit 561, the fifth voltage sampling sub-circuit 562 and the fifth control sub-circuit 563 in this embodiment are respectively the same as the fourth energy storage circuit 41, the fourth power switch circuit 42, the fourth example first power switch sub-circuit 421, the fourth example second power switch sub-circuit 422, the fourth example first switch sub-circuit 423, the fourth example second switch sub-circuit 424, the fourth main control circuit 46, the fourth current sampling sub-circuit 461, the fourth voltage sampling sub-circuit 462 and the fourth control sub-circuit 463, for details, please refer to Figure 5 And the related text content will not be repeated here.

[0079] This application also specifically adopts a power supply regulation method, see Figure 7 , Figure 7 This is a flow chart of the first embodiment of the power regulation method of the present application. Specifically, it may include the following steps:

[0080] S61: Receive a power input signal sent by a power circuit.

[0081] It is understandable that the power regulation method in this embodiment is specifically a method in which a power regulation circuit receives a power input signal sent by an external power circuit to regulate and control the power input signal. The power regulation circuit specifically includes an energy storage circuit, a power switch circuit, a DC isolation circuit, an isolation transformer, a rectifier circuit, and a main control circuit. The isolation transformer includes a primary winding and a secondary winding. The rectifier circuit includes a rectifier switch subcircuit and a rectifier energy storage subcircuit. The energy storage circuit is used to couple with the power circuit, the power switch circuit is coupled with the energy storage circuit, the DC isolation circuit is coupled with the power switch circuit, the primary winding is coupled with the power switch circuit and the DC isolation circuit, and is coupled with the secondary winding. The rectifier switch subcircuit is coupled with the secondary winding and the rectifier energy storage subcircuit. The main control circuit is coupled with the energy storage circuit and the power switch circuit.

[0082] It is worth noting that the AC power supply can be understood as AC power supply from a power grid, or a power regulation circuit that performs power conversion and regulation on the power supply from the power grid to obtain an AC power supply output.

[0083] Specifically, the energy storage circuit receives a power input signal from an external AC power source, that is, provided by a power supply circuit.

[0084] S62: Utilize the power input signal to adjust and obtain the energy storage current signal.

[0085] The energy storage circuit utilizes the power supply input signal to charge and store energy, or discharge and release energy to obtain an energy storage current signal.

[0086] S63: Generate a drive control signal using the input voltage of the power input signal and the energy storage current signal.

[0087] Among them, the main control circuit is used to obtain the input voltage and energy storage current signal of the power supply input signal from the energy storage circuit, so as to generate a drive control signal using the input voltage and energy storage current signal. For example, a drive control signal is generated according to the characteristics such as whether the input voltage is in the positive or negative half cycle, whether the energy storage current signal decreases from positive to zero or from negative to zero, and whether the energy storage current signal is less than a set current threshold.

[0088] S64: Regulate the energy storage current signal using the drive control signal.

[0089] The power switch circuit is specifically used to receive the drive control signal sent by the main control circuit, and change the switch state in response to the drive control signal, such as triggering the internal switch device to turn on or off, so as to adjust the energy storage current signal.

[0090] When the energy storage current signal in the energy storage circuit increases, the DC isolation circuit resonates with the primary winding through the power switch circuit in the current switching state, that is, the switching state in which the energy storage current signal begins to increase; and when the energy storage current signal gradually decreases, the induced voltage obtained by coupling the secondary winding and the primary winding will store energy in the rectifier energy storage sub-circuit through the rectifier switch sub-circuit to obtain a power supply output signal.

[0091] It is understandable that in some other embodiments, the power regulation circuit specifically includes some other more specific circuit units to be able to implement other more specific power regulation methods. For details, please refer to Figure 1-Figure 6 And related text descriptions will not be repeated here.

[0092] This application also specifically adopts a power conversion circuit, see Figure 8 , Figure 8 1 is a schematic diagram of a structure of an embodiment of the power conversion circuit of the present application. In this embodiment, the power conversion circuit 70 includes at least two sixth power regulation circuits 71, and the output end of each sixth power regulation circuit 71 is sequentially connected in series or in parallel.

[0093] In some embodiments, the main control circuit (not shown in the figure) in each sixth power supply regulation circuit 71 can be the same, that is, share one, or can be multiple and independently implement corresponding control, and the phase of the drive control signal sent by each main control circuit to its power switch circuit (not shown in the figure) is the same, or the phase is different, so as to facilitate the interleaving elimination of voltage and current ripples in each sixth power supply regulation circuit 71. The present application does not limit this.

[0094] It should be noted that the sixth power supply regulating circuit 71 described in this embodiment is the first power supply regulating circuit 10, the second power supply regulating circuit 20, the third power supply regulating circuit 30, the fourth power supply regulating circuit 40 or the fifth power supply regulating circuit 50 described in any one of the above embodiments. Figure 1-Figure 6 And the related text content will not be repeated here.

[0095] This application also specifically uses an electronic device, see Fig. 9 , Fig. 9 1 is a schematic diagram of the structure of an electronic device of the present application. In this embodiment, the electronic device 80 includes a housing 81 and a functional integrated circuit 82 connected to the housing 81 .

[0096] Optionally, the electronic device 80 may be any reasonable power supply device such as a charging pile, a photovoltaic charging device, an energy storage device or an industrial manufacturing device, and this application does not limit this.

[0097] It should be noted that the functional integrated circuit 82 described in this embodiment is the first power supply regulating circuit 10, the second power supply regulating circuit 20, the third power supply regulating circuit 30, the fourth power supply regulating circuit 40 or the fifth power supply regulating circuit 50, or the power conversion circuit 70 described in any one of the above embodiments. Figure 1-Figure 6 , Figure 8 And the related text content will not be repeated here.

[0098] The beneficial effects of the present application are as follows: different from the prior art, the energy storage circuit in the power supply regulation circuit provided by the present application is used to receive and use the power supply input signal to obtain the energy storage current signal; the main control circuit is used to obtain and use the input voltage of the power supply input signal and the energy storage current signal to generate a drive control signal; the power switch circuit receives and adjusts the energy storage current signal in response to the drive control signal, so that when the energy storage current signal increases, the DC isolation circuit and the primary winding resonate through the power switch circuit, and when the energy storage current signal decreases, the induced voltage obtained by coupling the secondary winding with the primary winding stores energy in the rectifier energy storage subcircuit, so that a main control circuit can be effectively used to realize power supply regulation control, and the primary winding and the secondary winding are used to perform corresponding resonance and coupling according to the size of the energy storage current signal to effectively realize electrical isolation and power transmission to meet the power supply demand, which also effectively simplifies the device configuration and its occupied space, simplifies the circuit control method, improves the drive control reliability and efficiency, and thus reduces the technical threshold.

[0099] 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 regulating circuit, characterized in that: The power supply regulation circuit comprises: An energy storage circuit, used to couple with a power supply circuit, the energy storage circuit being configured to receive a power supply input signal sent by the power supply circuit to obtain an energy storage current signal using the power supply input signal; A power switch circuit, coupled to the energy storage circuit; A DC isolation circuit coupled to the power switch circuit; An isolation transformer, comprising a primary winding and a secondary winding, wherein the primary winding is coupled to the power switch circuit and the DC isolation circuit, and is coupled to the secondary winding; A rectifier circuit, comprising a rectifier switch subcircuit and a rectifier energy storage subcircuit, wherein the rectifier switch subcircuit is coupled to the secondary winding and the rectifier energy storage subcircuit; A main control circuit coupled to the energy storage circuit and the power switch circuit, wherein the main control circuit is configured to obtain an input voltage of the power input signal in the energy storage circuit and the energy storage current signal, so as to generate a driving control signal using the input voltage and the energy storage current signal; Wherein, the power switch circuit is configured to receive the drive control signal sent by the main control circuit, and to change the switch state in response to the drive control signal to adjust the energy storage current signal, so that when the energy storage current signal increases, the DC isolation circuit and the primary winding resonate through the power switch circuit, and when the energy storage current signal decreases, the induced voltage obtained by coupling the secondary winding with the primary winding stores energy in the rectifier energy storage subcircuit through the rectifier switch subcircuit; The power switch circuit comprises a first power switch subcircuit, a second power switch subcircuit, a first switch subcircuit and a second switch subcircuit, the first power switch subcircuit is coupled to the energy storage circuit, the second power switch subcircuit, the first switch subcircuit and the main control circuit, the second power switch subcircuit is coupled to the second switch subcircuit and the main control circuit, the first switch subcircuit is coupled to the second switch subcircuit and the DC isolation circuit, and the second switch subcircuit is coupled to the primary winding; The driving control signal includes a first control signal and a second control signal, and the main control circuit is configured to adjust the first control signal to a first level when the input voltage is a positive voltage, and adjust the second control signal to the first level when the energy storage current signal passes through zero from a positive direction, and adjust the second control signal from the first level to a second level when the energy storage current signal is greater than or equal to a set current threshold; The main control circuit is used to adjust the second control signal to the first level when the input voltage is a negative voltage, and adjust the first control signal to the first level when the energy storage current signal passes through zero from a negative direction, so as to adjust the first control signal from the first level to the second level when the energy storage current signal is greater than or equal to the set current threshold; The first power switch subcircuit is configured to receive the first control signal to trigger conduction when the first control signal is at the first level, and to trigger shutdown when the first control signal is at the second level; The second power switch sub-circuit is configured to receive the second control signal to trigger conduction when the second control signal is at the first level, and to trigger shutdown when the second control signal is at the second level.

2. The power supply regulating circuit according to claim 1, characterized in that: The first switch subcircuit includes a first switch tube, the second switch subcircuit includes a second switch tube, and the rectifier switch subcircuit includes a third switch tube; The first switch tube and the second switch tube are of the same device type and are both three-electrode switch tubes or diodes, and the third switch tube is a three-electrode switch tube or a diode.

3. The power supply regulating circuit according to claim 2, characterized in that: When the first switch tube and the second switch tube are three-electrode switch tubes, the main control circuit is configured to generate a third control signal and a fourth control signal using the input voltage and the energy storage current signal, and when the input voltage is a positive voltage, adjust the third control signal to the second level and adjust the fourth control signal to the first level; when the input voltage is a negative voltage, adjust the third control signal to the first level and adjust the fourth control signal to the second level; Wherein, the first switch tube is configured to receive the third control signal, so as to trigger conduction when the third control signal is at the first level, and trigger shutdown when the third control signal is at the second level; the second switch tube is configured to receive the fourth control signal, so as to trigger conduction when the fourth control signal is at the first level, and trigger shutdown when the fourth control signal is at the second level; And / or, when the third switch tube is a three-electrode switch tube, the main control circuit is configured to generate a fifth control signal using the first control signal and the second control signal, so as to adjust the fifth control signal to be in phase with the second control signal when the input voltage is a positive voltage, and to adjust the fifth control signal to be in phase with the first control signal when the input voltage is a negative voltage.

4. The power supply regulating circuit according to claim 1, characterized in that: The number of the isolation transformers is at least two, the first end of each primary winding is coupled to the DC isolation circuit, the second end of each primary winding is coupled to the second switch sub-circuit, and each secondary winding is connected in series in sequence and coupled to the rectifier switch sub-circuit and the rectifier energy storage sub-circuit.

5. The power supply regulating circuit according to claim 1, characterized in that: The number of the DC blocking circuit, the isolation transformer, the rectifier switch subcircuit and the rectifier energy storage subcircuit is equal and at least two; Wherein, the first end of each of the DC blocking circuits is coupled to the first switch sub-circuit, the second end of each of the DC blocking circuits is coupled to the first end of one of the primary windings, and the second end of each of the primary windings is coupled to the second switch sub-circuit; The first end of each secondary winding is coupled to the first end of a rectifier switch sub-circuit, the second ends of each secondary winding are coupled to each other and to the second end of each rectifier energy storage sub-circuit, the second ends of each rectifier switch sub-circuit are coupled to each other and to the first end of each rectifier energy storage sub-circuit; or, each secondary winding and each rectifier switch sub-circuit are connected in series in sequence and coupled to each rectifier energy storage sub-circuit.

6. The power supply regulating circuit according to any one of claims 1 to 5, characterized in that: The energy storage circuit includes an energy storage inductor, the first power switch subcircuit includes a first power switch tube, the second power switch subcircuit includes a second power switch tube, the first switch subcircuit includes a first switch tube, the second switch subcircuit includes a second switch tube, the DC isolation circuit includes a first capacitor, the rectifier switch subcircuit includes a third switch tube, and the rectifier energy storage subcircuit includes a second capacitor; Among them, the first end of the energy storage inductor is used to couple with the first end of the power supply circuit, the second end of the energy storage inductor is coupled to the second end of the first power switch tube and the third end of the second power switch tube, the third end of the first power switch tube is coupled to the second end of the first switch tube and the first end of the first capacitor, the first end of the first switch tube is coupled to the second end of the second switch tube, and is used to couple with the second end of the power supply circuit, the second end of the first capacitor is coupled to the first end of the primary winding, the second end of the second power switch tube is coupled to the first end of the second switch tube and the second end of the primary winding, the first end of the secondary winding is coupled to the first end of the third switch tube, the second end of the third switch tube is coupled to the first end of the second capacitor, and is used to couple with the first end of the back-end signal circuit, and the second end of the secondary winding is coupled to the second end of the second capacitor, and is used to couple with the second end of the back-end signal circuit.

7. A power supply regulation method, applied to the power supply regulation circuit as claimed in any one of claims 1 to 6, characterized in that: The power supply regulation method comprises: receiving a power input signal sent by a power circuit; Using the power input signal to adjust and obtain an energy storage current signal; Generate a drive control signal using the input voltage of the power input signal and the energy storage current signal; The energy storage current signal is adjusted using the drive control signal.

8. A power conversion circuit, characterized in that: The power conversion circuit includes at least two power regulation circuits, and the output ends of each of the power regulation circuits are sequentially connected in series or in parallel; Wherein, the power supply regulation circuit is the power supply regulation circuit as claimed in any one of claims 1-6.

9. An electronic device, characterized in that: The electronic device comprises a housing and a functional integrated circuit connected to the housing; Wherein, the functional integrated circuit is a power regulation circuit as described in any one of claims 1 to 6, or a power conversion circuit as described in claim 8.

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