CN118677268B

CN118677268B - Power supply regulating circuit, power supply control method and electronic equipment

Info

Publication number: CN118677268B
Application number: CN202411177405.2A
Authority: CN
Inventors: 吴琼; 韩龙飞; 王重
Original assignee: Wuhan Magmett Electric Co ltd; Shenzhen Megmeet Electrical Co Ltd
Current assignee: Wuhan Magmett Electric Co ltd; Shenzhen Megmeet Electrical Co Ltd
Priority date: 2024-08-26
Filing date: 2024-08-26
Publication date: 2025-01-07
Anticipated expiration: 2044-08-26
Also published as: CN118677268A

Abstract

The present application discloses a power supply regulation circuit, a power supply control method and an electronic device, wherein the power supply regulation circuit includes: an inverter circuit for receiving a first DC signal input to convert it into a first AC signal; a resonant circuit for regulating the first AC signal into a resonant current signal; an isolation transformer for converting the resonant current signal into a second AC signal; an electric energy conversion circuit for converting the second AC signal into a second DC signal to output to a load circuit; a main control circuit for comparing the second AC signal with a set reference threshold to obtain a first control signal; and the electric energy conversion circuit utilizes a negative current in the second AC signal, or a negative current less than the set reference threshold to increase the energy storage of the resonant circuit, so as to extend the holding time of the second DC signal within the second voltage threshold when the first DC signal is lower than the first voltage threshold. In the above manner, the power supply regulation circuit of the present application can effectively extend the power-off holding time with low energy loss.

Description

Power supply regulating circuit, power supply control method and electronic equipment

Technical Field

The present application relates to the field of power technologies, and in particular, to a power supply adjusting circuit, a power supply control method, and an electronic device.

Background

In practical applications of the power supply regulating circuit, there is a need for power-off maintaining or low-voltage input compensation, that is, when the input voltage provided to the load terminal by the power supply regulating circuit drops, the load terminal needs to maintain the current operating voltage for a certain period of time to complete necessary work in time within the period of time of voltage maintenance. Particularly, as the application of the server power supply is wider and wider, the requirements of various industries on the performance index of the server power supply are higher and higher, and particularly the power-down holding time of the server power supply is longer and longer.

However, the existing power-off hold or low-voltage input compensation method generally adopts a method of increasing a storage capacitor in a power supply adjusting circuit or a voltage when the storage capacitor discharges. When the capacitor voltage is increased, a first-stage booster circuit is generally needed to increase the input voltage to a voltage level sufficient for the energy storage of the circuit to cope with the voltage output holding time under the condition of low voltage output, the volume and the cost of the power supply regulating circuit are also obviously increased, and the requirement on the rated voltage specification of the whole power circuit element is higher due to the increase of the working voltage, the energy loss is increased in the long-term operation process, the efficiency is reduced and the additional cost is increased.

Disclosure of Invention

The application mainly solves the technical problems of higher implementation cost and larger volume of power-off maintenance of the power supply regulating circuit in the prior art, and also increases energy loss, reduces efficiency and increases additional cost in the long-term operation process.

The power supply regulating circuit comprises an inverter circuit, a resonance circuit, an isolation transformer, an electric energy conversion circuit and a main control circuit, wherein the inverter circuit is used for receiving a first direct current signal input to convert the first direct current signal into a first alternating current signal, the resonance circuit is coupled with the inverter circuit to receive the first alternating current signal sent by the inverter circuit and regulate the first alternating current signal into a resonance current signal, the isolation transformer is coupled with the resonance circuit to receive the resonance current signal sent by the resonance circuit and convert the resonance current signal into a second alternating current signal, the electric energy conversion circuit is coupled with the isolation transformer and is used for being coupled with a load circuit to receive a second alternating current signal sent by the isolation transformer and convert the second alternating current signal into a second direct current signal to be output to the load circuit, the main control circuit is coupled with the electric energy conversion circuit, the main control circuit obtains the second alternating current signal in the electric energy conversion circuit to compare the second alternating current signal with a set reference threshold value, the electric energy conversion circuit receives the first control signal, the second alternating current signal is converted into the second direct current signal by the first control signal, and the second alternating current signal is converted into the second direct current signal by the second direct current signal, the second direct current signal is lower than the negative threshold value of the set by the second direct current threshold value, and the second direct current threshold value is lower than the negative threshold value of the second direct current threshold value.

The main control circuit is further used for obtaining a second direct current signal in the electric energy conversion circuit, so that when the voltage of the second direct current signal is larger than that of the second alternating current signal, the second alternating current signal is compared with a set reference threshold value to obtain a first control signal.

The isolation transformer comprises a primary winding, a first secondary winding and a second secondary winding, wherein the first secondary winding and the second secondary winding are coupled to the primary winding, the electric energy conversion circuit further comprises a first switch sub-circuit and a second switch sub-circuit, the primary winding is coupled to the resonance circuit, the first switch sub-circuit is coupled to the first secondary winding, the second switch sub-circuit and the main control circuit and is used for being coupled with the load circuit, the second switch sub-circuit is coupled to the second secondary winding and the main control circuit, the first control signal comprises a first driving signal and a second driving signal, wherein the second alternating current signal comprises a first voltage signal and a second voltage signal which are respectively arranged at two ends of the first secondary winding, the second voltage signal is arranged at two ends of the second secondary winding, a reference threshold value is set to be a voltage reference threshold value or a current reference threshold value, the main control circuit is used for acquiring the first voltage signal and the second voltage signal, when the first voltage signal is smaller than the voltage reference threshold value, the first driving signal is adjusted from the first level to the second level, and simultaneously or a delay time is set to enable the second driving signal to be adjusted from the second level to the first level, when the second voltage signal is smaller than the first voltage reference threshold value is smaller than the voltage reference threshold value, the first voltage signal is adjusted from the second level and the second voltage signal is equal to the second threshold value or the second threshold value is set to be a time-delayed time, the second signal is adjusted from the first voltage signal to the second level, and the second voltage signal is smaller than the first threshold value and the first threshold value is adjusted from the first voltage signal and the first threshold value and the second signal is equal to the second threshold value, and simultaneously or delaying a set time length to adjust the second driving signal from the second level to the first level, and when the second current signal is smaller than the current reference threshold value, adjusting the second driving signal from the first level to the second level, and simultaneously or delaying a set time length to adjust the first driving signal from the second level to the first level, wherein the difference value between the current reference threshold value and 0 is a set current amplitude value, and the first switch sub-circuit and the second switch sub-circuit are respectively used for receiving the first driving signal and the second driving signal so as to utilize the first driving signal and the second driving signal to adjust the energy storage of the second direct current signal and the resonant circuit.

The main control circuit further comprises a first sampling circuit, a second sampling circuit, a first proportional filtering corrector circuit and a control sub-circuit, wherein the first sampling circuit is coupled with the first switch sub-circuit and the first proportional filtering corrector circuit, the second sampling circuit is coupled with the second switch sub-circuit and the first proportional filtering corrector circuit, the first proportional filtering corrector circuit is coupled with the control sub-circuit, and the control sub-circuit is coupled with the first switch sub-circuit and the second switch sub-circuit; the first sampling circuit is used for sampling and obtaining first voltage signals at two ends of a first secondary winding and/or first current signals in a first switch sub-circuit, the second sampling circuit is used for sampling and obtaining second voltage signals at two ends of a second secondary winding and/or second current signals in the second switch sub-circuit, the first proportional filtering corrector circuit is used for receiving the first voltage signals and the second voltage signals so as to respectively conduct filtering and correcting processing on the first voltage signals and the second voltage signals in sequence to obtain first filtering signals and second filtering signals, and/or the first proportional filtering corrector circuit is used for receiving the first current signals and the second current signals so as to respectively conduct filtering and correcting processing on the first current signals and the second current signals in sequence to obtain first filtering signals and second filtering signals, and the control sub-circuit is used for receiving the first filtering signals and the second filtering signals so as to respectively generate first driving signals and second driving signals by the aid of the first filtering signals and the second filtering signals.

The inverter circuit comprises a first switch tube, a second switch tube, a third switch tube and a fourth switch tube, wherein the resonant circuit comprises a resonant capacitor and a resonant inductor, the first end of the first switch tube is coupled with the first end of the third switch tube and is used for being coupled with the first end of a direct-current power supply, the second end of the second switch tube is coupled with the second end of the fourth switch tube and is used for being coupled with the first end of the direct-current power supply, the second end of the first switch tube is coupled with the first end of the second switch tube and the first end of the resonant capacitor, the second end of the third switch tube is coupled with the first end of the fourth switch tube and the second end of the primary winding, the second end of the resonant capacitor is coupled with the first end of the resonant inductor, and the third ends of the first switch tube, the second switch tube and the fourth switch tube are coupled with the main control circuit.

The power supply regulating circuit further comprises an excitation inductor and a voltage stabilizing output circuit, the voltage stabilizing output circuit comprises a voltage stabilizing resistor and a voltage stabilizing capacitor, the first switching sub-circuit comprises a fifth switching tube, the second switching sub-circuit comprises a sixth switching tube, the first end of the primary winding is coupled with the first end of the resonance inductor and the first end of the excitation inductor, the second end of the primary winding is coupled with the second end of the third switching tube, the first end of the fourth switching tube and the second end of the excitation inductor, the first end of the first secondary winding is coupled with the first end of the fifth switching tube, the second end of the fifth switching tube is coupled with the first end of the voltage stabilizing resistor and the second end of the sixth switching tube, and is used for being coupled with the first end of the load circuit, the second end of the first secondary winding is coupled with the first end of the second secondary winding and the second end of the voltage stabilizing capacitor, the second end of the voltage stabilizing resistor is coupled with the first end of the third switching tube, the second end of the second secondary winding is coupled with the second end of the voltage stabilizing capacitor, and the second end of the third secondary winding is coupled with the third end of the voltage stabilizing resistor, and the third secondary winding is coupled with the third end of the third switching tube and the third switching tube.

The main control circuit is also used for acquiring a second direct current signal in the electric energy conversion circuit so as to compare the voltage of the second direct current signal with a third voltage threshold value, so as to determine the signal frequency of a third driving signal and a fourth driving signal, and send the third driving signal and the fourth driving signal according to the signal frequency, wherein the first switching tube and the fourth switching tube are used for receiving the third driving signal, the second switching tube and the third switching tube are used for receiving the fourth driving signal, and the third driving signal and the fourth driving signal are used for converting the first direct current signal into the first alternating current signal.

In order to solve the technical problems, the other technical scheme adopted by the application is that the power supply control method comprises the steps of receiving a first direct current signal, converting the first direct current signal into a first alternating current signal, adjusting the first alternating current signal into a resonant current signal, converting the resonant current signal into a second alternating current signal, converting the second alternating current signal into a second direct current signal to be output to a load circuit, comparing the second alternating current signal with a set reference threshold value to obtain a first control signal, adjusting the second direct current signal by the first control signal, improving the resonant current signal by negative current in the second alternating current signal or negative current smaller than the set reference threshold value, and prolonging the holding time of the second direct current signal within a second threshold value range by the aid of the improved resonant current signal when the first direct current signal is lower than the first voltage threshold value.

The method comprises the steps of setting a reference threshold value as a voltage reference threshold value, setting a second alternating current signal to be a voltage reference threshold value, setting a first control signal to be a first voltage signal and a second voltage signal, wherein the first control signal comprises a first driving signal and a second driving signal, comparing the second alternating current signal with the set reference threshold value to obtain a first control signal, adjusting the first driving signal from a first level to a second level when the first voltage signal is smaller than the voltage reference threshold value, adjusting the second driving signal from the second level to the first level when the second voltage signal is smaller than the voltage reference threshold value, adjusting the second driving signal from the first level to the second level when the second voltage signal is smaller than the voltage reference threshold value, adjusting the second direct current signal by the first control signal, adjusting the second direct current signal by the first driving signal and the second driving signal, and increasing the resonant current signal by negative current in the second direct current signal, wherein the negative current in the second direct current signal is smaller than the set reference threshold value, and increasing the resonant current by negative current in the second direct current.

The method comprises the steps of setting a reference threshold value as a current reference threshold value, setting a second alternating current signal to be a current amplitude value, setting the second alternating current signal to be a second level when the second alternating current signal is smaller than the current reference threshold value, and simultaneously or negatively lifting a resonant current signal by using a current smaller than the current reference threshold value in the second alternating current signal, wherein the second alternating current signal comprises a first current signal and a second current signal, and the step of adjusting the second alternating current signal comprises a step of adjusting the second direct current signal by using the first driving signal and the second driving signal when the second current signal is smaller than the current reference threshold value, and adjusting the second driving signal from the first level to the first level by using the first control signal.

In order to solve the technical problem, the application also provides electronic equipment, wherein the electronic equipment comprises a shell and a power supply regulating circuit connected with the shell, and the power supply regulating circuit is any one of the power supply regulating circuits.

The power supply regulating circuit has the advantages that the inverter circuit is used for receiving the first direct current signal to input, converting the first direct current signal into the first alternating current signal, the resonant circuit is used for regulating the first alternating current signal into the resonant current signal, the isolation transformer is used for converting the resonant current signal into the second alternating current signal, the electric energy converting circuit is used for converting the second alternating current signal into the second direct current signal to output the second direct current signal to the load circuit, the main control circuit obtains the second direct current signal to compare the second direct current signal with the set reference threshold value to obtain the first control signal, the electric energy converting circuit can convert the second direct current signal into the second direct current signal by utilizing the first control signal, and utilize negative current in the second direct current signal or negative current smaller than the set reference threshold value to boost the energy storage of the resonant circuit, so that when the first direct current signal is lower than the first voltage threshold value, the energy storage of the resonant circuit is used for prolonging the retention time of the second direct current signal in the second voltage threshold value, the power supply circuit can be effectively realized, the power-off retention is low in cost, the size is small, the circuit is simple, the response speed is easy, the power supply circuit is easy, the power supply is easy to be controlled, the power supply is more efficient and the power supply is more efficient, the power supply loss can be effectively reduced in the power supply is effectively, and the power supply is reduced in the long-time process.

Drawings

For a clearer description of the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:

FIG. 1 is a schematic diagram of a first embodiment of a power supply regulation circuit of the present application;

FIG. 2 is a schematic diagram of a second embodiment of the power supply regulation circuit of the present application;

FIG. 3 is a schematic waveform diagram of a first voltage signal across the first secondary winding and a second voltage signal across the second secondary winding of FIG. 2;

FIG. 4 is a schematic diagram of a third embodiment of a power supply regulation circuit according to the present application;

FIG. 5 is a schematic waveform diagram of the first current signal flowing through the first switching sub-circuit and the second current signal flowing through the first switching sub-circuit in FIG. 4;

FIG. 6 is a schematic flow chart of a first embodiment of the power control method of the present application;

FIG. 7 is a schematic flow chart of a second embodiment of the power control method of the present application;

FIG. 8 is a schematic flow chart of a third embodiment of a power control method of the present application;

fig. 9 is a schematic diagram of a frame of an embodiment of the electronic device of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to fall within the scope of the present application.

The terms "first," "second," "third," and the like in this disclosure are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", and "a third" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. All directional indications (such as up, down, left, right, front, rear) in the embodiments of the present application are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

The present application will be described in detail with reference to the drawings and embodiments.

Referring to fig. 1, fig. 1 is a schematic diagram of a power supply adjusting circuit according to a first embodiment of the application. In the present embodiment, the power supply regulating circuit 10 includes an inverter circuit 11, a resonance circuit 12, an isolation transformer 13, an electric energy conversion circuit 14, and a main control circuit 15.

The power supply adjusting circuit 10 provided by the application is specifically applied to power supply of an electric load requiring direct current output, so as to utilize the direct current input from the outside, and provide the direct current to any reasonable electric load in electronic equipment such as a server, a computer, an intelligent communication device and the like for working and running after corresponding adjustment control of the direct current, which is not limited in this embodiment.

Specifically, the inverter circuit 11 is configured to receive a first dc signal input, and utilize an internal switching mechanism, such as an IGBT (Insulated Gate Bipolar Transistor ), a high-frequency Transistor, a MOS (Metal Oxide Semiconductor FIELD EFFECT Transistor ), or the like, to rapidly switch dc power under signal control to generate an alternating voltage waveform, thereby obtaining a first ac signal.

It should be noted that, the first dc signal may be specifically understood as a dc input provided by an external dc power supply to the power supply adjusting circuit 10, or may be a dc power supply output after performing power conversion and adjustment on a commercial power frequency power supply, a photovoltaic power supply, an independent generator, or any other reasonable upper ac or dc power supply.

In addition, "coupled" herein is meant to include any direct or indirect connection. Thus, if a first circuit is coupled to a second circuit, it is intended that the first circuit be directly connected to the second circuit by an electrical connection or a signal connection such as wireless transmission, optical transmission, or the like, or be indirectly connected to the second circuit electrically or by other circuits or connection means.

The resonant circuit 12 is directly connected with the inverter circuit 11 to receive the first ac signal sent by the inverter circuit 11, and performs any reasonable signal adjustment such as filtering shaping and phase shift on the first ac signal to obtain a resonant current signal, so as to achieve better output characteristics and ensure that the subsequent links, such as the electric energy conversion circuit 14 or the load, obtain more stable and efficient electric energy.

The isolation transformer 13 is coupled to the resonant circuit 12 to receive the resonant current signal sent by the resonant circuit 12 and convert the resonant current signal into a second ac signal, so as to replace electrical connection with electromagnetic connection, and be used for realizing the electrical isolation and voltage matching of the primary and secondary side safety regulations, and meet the insulation requirements of the primary and secondary side electrical safety regulations.

The power conversion circuit 14 is coupled to the isolation transformer 13 and is used to couple with an external load circuit 101, particularly with respect to transformer isolation and rectification. Specifically, the electric energy conversion circuit 14 receives the second ac signal sent by the isolation transformer 13, so as to obtain a stable dc output, that is, a second dc signal, by using one of any reasonable rectifying modes, such as PWM, synchronous rectification, inverse damping rectification, and the like, by using the high frequency rectifying technology, and outputs the second dc signal to the load circuit 101, thereby satisfying the electric energy usage of the load circuit 101.

The load circuit 101 may be understood as a signal function circuit that performs operation by using the dc output of the power supply adjusting circuit 10, that is, the second dc signal, and may specifically be one or more of any reasonable circuit units integrated with a storage medium, a memory circuit element, etc., so that power-off maintenance needs to be implemented, and necessary operations such as buffering, signal transmission, etc. are completed in time.

The main control circuit 15 is coupled to the power conversion circuit 14 for continuously monitoring the second ac signal from the power conversion circuit 14, and comparing the second ac signal with a set reference threshold value to generate a first control signal based on a current comparison result, for example, adjusting a level state of the first control signal in response to the voltage amplitude or the current amplitude of the second ac signal being smaller than the set reference threshold value, so as to obtain the first control signal having a corresponding level change state.

Optionally, the first control signal may be one or more of any reasonable control signal, such as a PWM (Pulse Width Modulation ) signal or a PFM (Pulse Frequency Modulation, pulse frequency modulation) signal, which is not limited in this aspect of the present application.

Optionally, the main control circuit 15 may specifically include one of a control chip, an MCU (Micro Controller Unit, micro control 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, and any reasonable circuit unit with a signal processing function, which is not limited in this application.

The power conversion circuit 14 is specifically configured to receive a first control signal sent by the main control circuit 15, and to use one of any reasonable rectifying modes, such as PWM, synchronous rectification, and inverse damping rectification, to change a switching state in response to the first control signal, so as to convert the second ac signal into the second dc signal.

It should be noted that, because the primary side of the isolation transformer 13 has an unstable power output, or the voltage of the resonant current signal has a ripple, and/or the load circuit 101 on the secondary side of the isolation transformer 13 has an unstable voltage, so that the output voltage on the secondary side of the isolation transformer 13 is inevitably higher than the input voltage on the primary side of the isolation transformer 13, a negative current will occur on the secondary side of the isolation transformer 13, that is, a negative current will exist on the secondary side of the isolation transformer 13, that is, the second direct current signal obtained by converting the second alternating current signal through the electric energy conversion circuit 14, so that the negative current is returned to the primary side of the isolation transformer 13 through the on-off control of the electric energy conversion circuit 14, so that the energy storage of the resonant circuit 12 can be effectively improved.

The set reference threshold may be a voltage reference threshold or a current reference threshold, and when the set reference threshold is a voltage reference threshold, the voltage reference threshold is greater than 0, and when the set reference threshold is a current reference threshold, the difference between the current reference threshold and 0 is a set current amplitude, and may be greater than 0, less than 0, or equal to 0, wherein when the current reference threshold is greater than 0, the set current amplitude may correspond to a switching operation delay stage of the electric energy conversion circuit 14, and the second ac signal may be reduced from the current reference threshold to a current amplitude corresponding to 0, so as to enhance energy storage of the resonant circuit 12 by using negative current of the second ac signal as much as possible.

The power conversion circuit 14 is specifically further configured to utilize a negative current in the second ac signal, or a negative current smaller than a set reference threshold in the second ac signal, that is, if a negative current occurs in the second ac signal (the current flows from the load circuit 101 to the isolation transformer 13), or when the magnitude of the negative current of the second ac signal is smaller than the set reference threshold, the power conversion circuit 14 changes its switching state under the action of the first control signal, so as to return the negative current or the negative current smaller than the set reference threshold to the primary side of the isolation transformer 13, so as to boost the energy storage of the resonant circuit 12, so that when the power supply adjustment circuit 10 is powered down, that is, the input of the first dc signal is reduced or vanished, so that the energy storage of the resonant circuit 12 is lower than the first voltage threshold, the retention time of the second dc signal within the second voltage threshold can be prolonged.

It should be noted that the first voltage threshold may be understood as a threshold range where the voltage of the first dc signal is located when the first dc signal is normally powered or when the power supply regulator circuit 10 maintains normal operation, so that when the current voltage of the first dc signal is detected to be lower than the first threshold range, it may be determined that the input of the first dc signal is reduced or lost, that is, the current power is lost, and the second threshold range may be understood as a threshold range where the voltage and the current of the load circuit 101 maintains normal operation, which may be specifically determined by an actual application scenario, which is not limited in the present application.

In addition, in some special operations of the load circuit 101, for example, when one or more of any reasonable circuit units such as a storage medium and a memory circuit element are integrated, in order to avoid irreparable losses such as cache failure and data loss caused by power interruption, when the power supply source of the load circuit 101 stops supplying power, the power supply output provided to the load circuit 101 needs to be maintained for a certain period of time, that is, the second direct current signal is effectively maintained within the second threshold range for a certain period of time, so as to complete necessary operations in time within the period of voltage maintenance.

According to the scheme, when the first direct current signal is powered down, the energy storage of the resonant circuit 12 is utilized to prolong the retention time of the second direct current signal in the third voltage threshold, so that the power-off retention can be effectively realized, the implementation cost is low, the size is small, the circuit is simple, the response speed is high, the circuit control is simpler, the power-off time delay is longer, in addition, the circuit energy loss is effectively reduced in the long-term operation process of the power supply regulating circuit 10, the power supply efficiency and the reliability are improved, and the extra cost is avoided.

In an embodiment, the main control circuit 15 is further specifically configured to obtain a second dc signal in the power conversion circuit 14, so as to compare the second ac signal with a set reference threshold value to obtain the first control signal when detecting that the voltage of the second dc signal is greater than the voltage of the second ac signal, that is, determining that the second ac signal has a negative current.

And when the main control circuit 15 determines that the second ac signal does not have negative current, the main control circuit may specifically use one of any reasonable rectifying modes, such as PWM, synchronous rectification, and inverse damping rectification, to convert the second ac signal into a second dc signal for outputting to the load circuit 101, so as to satisfy the normal electric energy usage of the load circuit 101, thereby avoiding inappropriate control of the electric energy conversion circuit 14 when the second ac signal does not have negative current, and affecting the normal usage of the power supply adjusting circuit 10.

Referring to fig. 2 and fig. 3 in combination, fig. 2 is a schematic structural diagram of a second embodiment of the power supply adjusting circuit of the present application, and fig. 3 is a schematic waveform diagram of a first voltage signal across the first secondary winding and a second voltage signal across the second secondary winding in fig. 2. The power supply adjusting circuit in this embodiment is different from the first embodiment of the power supply adjusting circuit provided by the present application in that the isolation transformer 23 in the power supply adjusting circuit 20 further includes a primary winding 231, a first secondary winding 232, and a second secondary winding 233.

Specifically, the power conversion circuit 24 further includes a first switch sub-circuit 241 and a second switch sub-circuit 242, the primary winding 231 is coupled to the resonant circuit 22, the first switch sub-circuit 241 is coupled to the first secondary winding 232, the second switch sub-circuit 242, and the main control circuit 25, and is configured to be coupled to the load circuit 101, the second switch sub-circuit 242 is coupled to the second secondary winding 233 and the main control circuit 25, and the primary winding 231 is coupled to the first secondary winding 232 and the second secondary winding 233.

The first control signal specifically further includes a first driving signal PWM1 and a second driving signal PWM2, the second ac signal specifically further includes a first voltage signal Vup at two ends of the first secondary winding 232 and a second voltage signal Vdn at two ends of the second secondary winding 233, and the set reference threshold is specifically a voltage reference threshold V _H, where the voltage reference threshold V _H is greater than 0 and is close to 0.

The main control circuit 25 is specifically configured to obtain the first voltage signal Vup and the second voltage signal Vdn, so as to adjust the first driving signal PWM1 from the first level to the second level and simultaneously or with a delay setting time Tdb, adjust the second driving signal PWM2 from the second level to the first level when determining that the first voltage signal Vup is smaller than the voltage reference threshold V _H.

When the second voltage signal Vdn is determined to be smaller than the voltage reference threshold V _H, the main control circuit 25 specifically adjusts the second driving signal PWM2 from the first level to the second level, and simultaneously or delay the set period Tdb to adjust the first driving signal PWM1 from the second level to the first level, so as to adjust the level states of the first driving signal PWM1 and the second driving signal PWM2 according to the periodic cycle, that is, repeat the level change state at each signal period Ts, thereby obtaining the first driving signal PWM1 and the second driving signal PWM2.

It should be noted that the set duration Tdb may be specifically determined according to a delay time, that is, a dead time, when the first switch sub-circuit 241 and the second switch sub-circuit 242 trigger on or off, which is not limited in the present application.

In addition, the first driving signal PWM1 may specifically trigger the first switch sub-circuit 241 to be turned on in the first level, and trigger the first switch sub-circuit 241 to be turned off in the second level, and the second driving signal PWM2 and the second switch sub-circuit 242 are similar, which is not described herein.

Alternatively, the first level may be a high level and the second level may be a low level or a 0 level, or the first level may be a low level or a 0 level and the second level may be a high level, which is not limited in this application.

The first switch sub-circuit 241 is configured to receive the first driving signal PWM1 to change a switching state under the action of the first driving signal PWM1, and the second switch sub-circuit 242 is configured to receive the second driving signal PWM2 to change a switching state under the action of the second driving signal PWM2, and cooperate with the switching state of the first switch sub-circuit 241 to convert the second ac signal into the second dc signal, and utilize a negative current in the second ac signal to boost the energy storage of the resonant circuit 22.

It can be understood that, since the voltage reference threshold V _H is greater than 0 and is close to 0, and the first switch sub-circuit 241 and the second switch sub-circuit 242 are connected in series between the isolation transformer 23 and the load circuit 101, when the first voltage signal Vup is smaller than the voltage reference threshold V _H, the first driving signal PWM1 is adjusted from the first level to the second level to trigger the first switch sub-circuit 241 to be turned off, so that the negative current in the second ac signal can be effectively returned to the primary side of the isolation transformer 23 to boost the energy storage of the resonant circuit 22, so that the energy storage of the resonant circuit 22 can be effectively utilized to prolong the power-down holding time, and the second driving signal PWM2 and the second switch sub-circuit 242 are the same and are not described herein.

In an embodiment, the master circuit 25 specifically further includes a first sampling circuit, a second sampling circuit, a first proportional filtering corrector circuit 253 and a control circuit 254, wherein the first sampling circuit is coupled to the first switch circuit 241 and the first proportional filtering corrector circuit 253, the second sampling circuit is coupled to the second switch circuit 242 and the first proportional filtering corrector circuit 253, the first proportional filtering corrector circuit 253 is coupled to the control circuit 254, and the control circuit 254 is coupled to the first switch circuit 241 and the second switch circuit 242.

The first sampling circuit may be specifically a first voltage sampling circuit 251 for sampling and obtaining a first voltage signal Vup at two ends of the first secondary winding 232, and the second sampling circuit is correspondingly a second voltage sampling circuit 252 for sampling and obtaining a second voltage signal Vdn at two ends of the second secondary winding 233.

The first proportional filtering corrector circuit 253 is configured to receive the first voltage signal Vup sent by the first voltage sampling circuit 251 and the second voltage signal Vdn sent by the second voltage sampling circuit 252, and sequentially perform filtering and correction on the first voltage signal Vup and the second voltage signal Vdn to obtain a first filtered signal and a second filtered signal, so as to provide a more suitable high-quality input for the control sub-circuit 254, thereby effectively optimizing the overall performance and reliability of the main control circuit 25, and realizing efficient control.

The control sub-circuit 254 is specifically configured to receive the first filtered signal and the second filtered signal, so as to generate the first driving signal PWM1 and the second driving signal PWM2 by using the first filtered signal and the second filtered signal, respectively.

In one embodiment, the inverter circuit 21 specifically includes a first switching tube Q1, a second switching tube Q2, a third switching tube Q3 and a fourth switching tube Q4, and the resonant circuit 22 includes a resonant capacitor Cr and a resonant inductor Lr.

The first end of the first switching tube Q1 is coupled to the first end of the third switching tube Q3 and is used for being coupled to the first end of the dc power source 102, the second end of the second switching tube Q2 is coupled to the second end of the fourth switching tube Q4 and is used for being coupled to the first end of the dc power source 102, the second end of the first switching tube Q1 is coupled to the first end of the second switching tube Q2 and the first end of the resonance capacitor Cr, the second end of the third switching tube Q3 is coupled to the first end of the fourth switching tube Q4 and the second end of the primary winding 231, the second end of the resonance capacitor Cr is coupled to the first end of the resonance inductor Lr, the second end of the resonance inductor Lr is coupled to the first end of the primary winding 231, and the third ends of the first switching tube Q1, the second switching tube Q2, the third switching tube Q3 and the fourth switching tube Q4 are coupled to the master control circuit 25.

Optionally, the first switching Transistor Q1, the second switching Transistor Q2, the third switching Transistor Q3, and the fourth switching Transistor Q4 may be one of a MOS (Metal Oxide Semiconductor FIELD EFFECT Transistor), a triode, a thin film Transistor, a field effect Transistor, or any other reasonable switching Transistor, which is not limited in this application.

It should be noted that, to distinguish the two ends of each switch tube except the control end, one of the two ends is called a first end, and the other is called a second end. When each switching tube is a triode, the control end, namely the third end, can be a base electrode, the first end is a collector electrode, and the second end is an emitter electrode, or the third end can be a base electrode, the first end is an emitter electrode, and the second end is a collector electrode.

When each of the above switch transistors is a MOS transistor, a thin film transistor, or a field effect transistor, the third terminal may be a gate, the first terminal is a drain, the second terminal is a source, or the third terminal may be a gate, the first terminal is a source, and the second terminal is a drain.

When each switching transistor is a MOS transistor, a thin film transistor, or a field effect transistor, a composite transistor or a single transistor may be specifically used.

It is to be understood that, in other embodiments, the inverter circuit 21 may be specifically any reasonable circuit form for implementing dc-to-ac power, such as a full-bridge circuit, a symmetrical half-bridge circuit, or an asymmetrical half-bridge circuit, which is not limited in the present application.

It can be known that the inverter circuit 21 may be a full-bridge inverter circuit 21, and in other embodiments, the inverter circuit 21 may be any reasonable circuit form for implementing dc-ac conversion, such as a symmetrical half-bridge circuit or an asymmetrical half-bridge circuit, for receiving the second Control signal sent by the main Control circuit 25, and any reasonable motor driving Control strategy, such as SVPWM (Space Vector Pulse Width Modulation, space-adaptive modulation), SPWM (Sinusoidal Pulse Width Modulation ), DTC (Direct torque Control, direct torque Control) or FOC (Field-Oriented Control), may be adopted, where the switching state is changed under the action of the second Control signal, and the current, voltage and frequency of the first dc signal received by the inverter circuit are adjusted and controlled to be converted into the corresponding first ac signal, which is not limited by the present application.

Further, in an embodiment, the power supply adjusting circuit 20 specifically further includes an excitation inductor 26, that is, an excitation inductor Lm and a regulated output circuit 27, where the regulated output circuit 27 includes a regulated resistor Ro and a regulated capacitor Co, the first switching sub-circuit 241 includes a fifth switching tube Q5, and the second switching sub-circuit 242 includes a sixth switching tube Q6.

The first end of the primary winding 231 is coupled to the first end of the resonant inductor Lr and the first end of the exciting inductor Lm, the second end of the primary winding 231 is coupled to the second end of the third switching tube Q3, the first end of the fourth switching tube Q4 and the second end of the exciting inductor Lm, the first end of the first secondary winding 232 is coupled to the first end of the fifth switching tube Q5, the second end of the fifth switching tube Q5 is coupled to the first end of the voltage stabilizing resistor Ro and the second end of the sixth switching tube Q6, and is used for coupling to the first end of the load circuit 101, the second end of the first secondary winding 232 is coupled to the first end of the second secondary winding 233 and the second end of the voltage stabilizing capacitor Co, and is used for coupling to the second end of the load circuit 101, the second end of the voltage stabilizing resistor Ro is coupled to the first end of the voltage stabilizing capacitor Co, the second end of the third secondary winding 233 is coupled to the first end of the sixth switching tube Q6, and the third end of the fifth switching tube Q5 and the third end of the sixth switching tube Q6 are coupled to the third end of the master control circuit 25.

It will be appreciated that the second ac signal is specifically converted to a pulsating dc signal by the power conversion circuit 24, i.e. the half-bridge rectifier circuit, which is in turn rectified to a set dc voltage by the voltage regulator output circuit 27 to be output to power the load circuit 101, thereby determining a stable dc output.

In an embodiment, the main control circuit 25 is further specifically configured to obtain the second dc signal output by the power conversion circuit 24 to the load circuit 101, compare the voltage of the second dc signal with the third voltage threshold, determine the signal frequencies and/or duty ratios of the third driving signal pwm×a and the fourth driving signal pwm×b based on the comparison difference between the second dc signal and the third voltage threshold, and send the third driving signal pwm×a to the first switching tube Q1 and the fourth switching tube Q4 according to the currently determined signal frequencies and/or duty ratios, and send the fourth driving signal pwm×b to the second switching tube Q2 and the third switching tube Q3, so as to trigger the first switching tube Q1, the fourth switching tube Q4, the second switching tube Q2 and the third switching tube Q3 to adjust the switching states thereof, thereby converting the first dc signal into the first ac signal.

It should be noted that the second dc signal includes a current signal and a voltage signal, and the third voltage threshold may be specifically understood as a target power supply requirement of the load circuit 101, such as a target set value of a voltage, a current, or a power of a power supply output currently required by the load circuit 101, and may also be understood as a preset target power supply signal.

The master control circuit 25 dynamically adjusts the signal frequencies of the third driving signal PWM a and the fourth driving signal PWM B by using the difference between the second dc signal and the third voltage threshold, for example, when the second dc signal is determined to be smaller than the third voltage threshold, the current signal frequencies and/or duty ratios of the third driving signal PWM a and the fourth driving signal PWM B are increased, and when the second dc signal is determined to be larger than the third voltage threshold, the current signal frequencies and/or duty ratios of the third driving signal PWM a and the fourth driving signal PWM B are decreased until the second dc signal is adjusted to the target set value of the voltage, the current or the power, that is, the range of the third voltage threshold, and the signal frequencies and/or duty ratios of the third driving signal PWM a and the fourth driving signal PWM B in the stable state are determined.

Further, in an embodiment, the master circuit 35 specifically further includes a second proportional-filter-corrector circuit 255, and the second proportional-filter-corrector circuit 255 is coupled to the regulated output circuit 27 and the control sub-circuit 254.

The second proportional filtering corrector circuit 255 is configured to receive the second dc signal sent by the voltage stabilizing output circuit 27, and sequentially perform filtering and correction processing on the second dc signal to obtain a third filtered signal, so as to provide a more suitable high-quality input for the control sub-circuit 254, thereby effectively optimizing the overall performance and reliability of the main control circuit 25, and realizing efficient control.

The control sub-circuit 254 is further configured to receive the third filtered signal to generate a third driving signal pwm×a and a fourth driving signal pwm×b using the third filtered signal.

Referring to fig. 4 and fig. 5 in combination, fig. 4 is a schematic structural diagram of a third embodiment of the power supply adjusting circuit according to the present application, and fig. 5 is a schematic waveform diagram of a first current signal flowing through the first switch sub-circuit and a second current signal flowing through the first switch sub-circuit in fig. 4. The difference between the power supply adjusting circuit in this embodiment and the second embodiment of the power supply adjusting circuit provided by the present application is that the first sampling circuit in the main control circuit 35 of the power supply adjusting circuit 30 is specifically a first current sampling circuit 351, and the second sampling circuit is specifically a second current sampling circuit 352.

Specifically, the first sampling circuit is used for sampling and acquiring a first current signal Iup in the first switch sub-circuit 341, and the second sampling circuit is used for sampling and acquiring a second current signal Idn in the second switch sub-circuit 342.

The first proportional filtering corrector circuit 353 is configured to receive the first current signal Iup sent by the first current sampling circuit 351 and the second current signal Idn sent by the second current sampling circuit 352, and sequentially perform filtering and correction processing on the first current signal Iup and the second current signal Idn to obtain a first filtering signal and a second filtering signal, so as to provide a more suitable high-quality input for the control sub-circuit 354, thereby effectively optimizing the overall performance and reliability of the main control circuit 35, and realizing efficient control.

The control sub-circuit 354 is specifically configured to receive the first filtered signal and the second filtered signal, so as to generate the first driving signal PWM1 and the second driving signal PWM2 by using the first filtered signal and the second filtered signal, respectively.

In an embodiment, the first control signal specifically further includes a first driving signal PWM1 and a second driving signal PWM2, the second ac signal specifically further includes a first current signal Iup flowing through the first switch sub-circuit 341 and a second current signal Idn flowing through the first switch sub-circuit 341, and the set reference threshold is specifically a current reference threshold I _H, and a difference between the current reference threshold I _H and 0 is a set current amplitude, and may specifically be greater than 0, less than 0, or equal to 0. When the current reference threshold I _H is greater than 0, the set current amplitude may specifically correspond to a switching operation delay stage of the electric energy conversion circuit 34, and the second ac signal may be reduced from the current reference threshold I _H to a current amplitude corresponding to 0.

The master circuit 35 is specifically configured to obtain the first current signal Iup and the second current signal Idn, so as to adjust the first driving signal PWM1 from the first level to the second level and simultaneously or with a delay for a set period Tdb, adjust the second driving signal PWM2 from the second level to the first level when it is determined that the first current signal Iup is smaller than the current reference threshold I _H.

When the second current signal Idn is determined to be smaller than the current reference threshold I _H, the main control circuit 35 specifically adjusts the second driving signal PWM2 from the first level to the second level, and simultaneously or delay the set period Tdb to adjust the first driving signal PWM1 from the second level to the first level, so as to adjust the level states of the first driving signal PWM1 and the second driving signal PWM2 according to the periodic cycle, that is, duplicate the level change states in each signal period Ts, thereby obtaining the first driving signal PWM1 and the second driving signal PWM2.

The first switch sub-circuit 341 is configured to receive the first driving signal PWM1 to change a switching state under the action of the first driving signal PWM1, and the second switch sub-circuit 342 is configured to receive the second driving signal PWM2 to change a switching state under the action of the second driving signal PWM2, and cooperate with the switching state of the first switch sub-circuit 341 to convert the second ac signal into the second dc signal, and utilize a negative current in the second ac signal or a negative current smaller than a set reference threshold value in the second ac signal to boost the energy storage of the resonant circuit 32.

It can be understood that, since the current reference threshold I _H is equal to 0 or close to 0, and the first switch sub-circuit 341 and the second switch sub-circuit 342 are connected in series between the isolation transformer 33 and the load circuit 101, when the first current signal Iup is smaller than the current reference threshold I _H, the first driving signal PWM1 is adjusted from the first level to the second level to trigger the first switch sub-circuit 341 to be turned off, so that the negative current in the second ac signal or the negative current smaller than the current reference threshold I _H in the second ac signal can be effectively returned to the primary side of the isolation transformer 33, so as to boost the energy storage of the resonant circuit 32, and thus the energy storage of the resonant circuit 32 can be utilized to effectively prolong the power-down holding time, and the second driving signal PWM2 and the second switch sub-circuit 342 are identical and are not described herein.

Optionally, the first current sampling circuit 351 and the second current sampling circuit 352 may be specifically a circuit unit formed by connecting any reasonable circuit elements such as a current transformer, a resistor, a capacitor, and the like, which is not limited in the present application.

It is to be understood that, in the present embodiment, the inverter circuit 31, the resonant circuit 32, the isolation transformer 33, the primary winding 331, the first secondary winding 332, the second secondary winding 333, the power conversion circuit 34, the first switching sub-circuit 341, the second switching sub-circuit 342, the main control circuit 35, the first proportional filtering correction sub-circuit 353, the control sub-circuit 354, the second proportional filtering correction sub-circuit 355, the excitation inductance 36 and the voltage stabilizing output circuit 37 are the same as the inverter circuit 21, the resonant circuit 22, the isolation transformer 23, the primary winding 231, the first secondary winding 232, the second secondary winding 233, the power conversion circuit 24, the first switching sub-circuit 241, the second switching sub-circuit 242, the main control circuit 25, the first proportional filtering correction sub-circuit 253, the control sub-circuit 254, the second proportional filtering correction sub-circuit 255, the excitation inductance 26 and the voltage stabilizing output circuit 27, respectively, which are not described herein.

Referring to fig. 6, fig. 6 is a schematic flow chart of an embodiment of the power control method of the present application. Specifically, the method may include the steps of:

S41, receiving a first direct current signal input.

It can be understood that the power supply control method in this embodiment is specifically a control method in which the power supply adjusting circuit uses the externally input direct current, and provides the direct current to the load circuit after performing corresponding adjustment control on the direct current. The power supply regulating circuit specifically comprises an inverter circuit, a resonant circuit, an isolation transformer, an electric energy conversion circuit and a main control circuit, wherein the resonant circuit is coupled with the inverter circuit, the isolation transformer is coupled with the resonant circuit, and the electric energy conversion circuit is coupled with the isolation transformer and is used for being coupled with the load circuit.

Specifically, the inverter circuit is configured to receive a first dc signal input.

It should be noted that the first dc signal may be specifically understood as a dc input provided by an external dc power supply to the power supply adjusting circuit, or may be a dc power supply output after performing power conversion and adjustment on a commercial power frequency power supply, a photovoltaic power supply, an independent generator, or any other reasonable upper ac or dc power supply.

And S42, converting the first direct current signal into a first alternating current signal.

Further, the inverter circuit uses the internal switching action mechanism, such as the switching action mechanism of switching devices of IGBT, high-frequency transistor, MOS, and the like, to rapidly switch the DC power under the control of the signal, so as to generate an alternating voltage waveform and obtain a first AC signal.

And S43, adjusting the first alternating current signal into a resonance current signal.

The resonant circuit receives the first alternating current signal sent by the inverter circuit, and performs any reasonable signal adjustment such as filtering shaping and phase displacement on the first alternating current signal to obtain a resonant current signal so as to achieve better output characteristics and ensure that the follow-up links such as an electric energy conversion circuit or a load obtain more stable and efficient electric energy.

And S44, converting the resonance current signal into a second alternating current signal.

The isolation transformer receives the resonance current signal sent by the resonance circuit and converts the resonance current signal into a second alternating current signal, so that electromagnetic connection is adopted to replace electric connection, the isolation transformer is used for realizing the electric isolation and voltage matching of the primary side safety standard and the secondary side safety standard, and the insulation requirements of the primary side safety standard and the secondary side safety standard are met.

S45, converting the second alternating current signal into a second direct current signal to be output to the load circuit.

The electric energy conversion circuit receives a second alternating current signal sent by the isolation transformer, and obtains stable direct current output, namely a second direct current signal, by utilizing one of any reasonable rectification modes such as PWM, synchronous rectification, inverse damping rectification and the like by utilizing a high-frequency rectification technology, so as to output the second direct current signal to the load circuit, and the electric energy use of the load circuit is met.

And S46, comparing the second alternating current signal with a set reference threshold value to obtain a first control signal.

The main control circuit is used for continuously monitoring a second alternating current signal from the electric energy conversion circuit and comparing the second alternating current signal with a set reference threshold value to generate a first control signal based on the current comparison result, for example, the level state of the first control signal is adjusted in response to the voltage amplitude or the current amplitude of the second alternating current signal being smaller than the set reference threshold value, so as to obtain the first control signal with corresponding level change state.

Optionally, the first control signal may be one or more of any reasonable control signals, such as a PWM signal or a PFM signal, which is not limited in the present application.

And S47, adjusting the second direct current signal by using the first control signal.

The electric energy conversion circuit is specifically configured to receive a first control signal sent by the main control circuit, and to use one of any reasonable rectifying modes, such as PWM, synchronous rectification, inverse damping rectification, and the like, to change a switching state in response to the first control signal, so as to convert the second ac signal into the second dc signal.

And S48, utilizing negative current in the second alternating current signal or negative current smaller than a set reference threshold value to boost the resonance current signal.

The power conversion circuit is specifically further configured to utilize a negative current in the second ac signal, or a negative current smaller than a set reference threshold in the second ac signal, that is, if a negative current occurs in the second ac signal (a current direction flows from the load circuit to the isolation transformer), or when an amplitude of the negative current of the second ac signal is smaller than the set reference threshold, the power conversion circuit changes a switching state thereof under the action of the first control signal, so as to return the negative current or the negative current smaller than the set reference threshold to a primary side of the isolation transformer, so as to improve energy storage of the resonant circuit, that is, a resonant current signal.

And S49, when the first direct current signal is lower than the first voltage threshold value, prolonging the holding time of the second direct current signal within the second threshold value range by utilizing the boosted resonant current signal.

Further, when the power supply adjusting circuit is powered off, that is, the input of the first direct current signal is reduced or eliminated, so that the first direct current signal is lower than the first voltage threshold value, the second direct current signal can be prolonged to be kept within the second voltage threshold value by using the lifted resonance current signal.

It should be noted that the first voltage threshold may be understood as a threshold range where the voltage of the first dc signal is located when the first dc signal is normally powered or the power supply adjusting circuit maintains normal operation, so that when it is detected that the current voltage of the first dc signal is lower than the first threshold range, it may be determined that the input of the first dc signal is reduced or lost, that is, the current power is lost, and the second threshold range may be understood as a threshold range where the voltage and the current of the load circuit maintains normal operation, which may be specifically determined by an actual application scenario, which is not limited by the present application.

In addition, in some special operations of the load circuit, for example, when one or more of any reasonable circuit units such as a storage medium and a memory circuit element are integrated, in order to avoid irreparable losses such as cache failure and data loss caused by power interruption, when the power supply source of the load circuit stops supplying power, the power supply output provided to the load circuit needs to be maintained for a certain time, that is, the second direct current signal is effectively maintained for a certain period of time within the second threshold range, so as to complete necessary operations in time within the period of voltage maintenance.

Referring to fig. 7, fig. 7 is a flowchart illustrating a power control method according to a second embodiment of the application. The power control method of the present embodiment is a flowchart of a refinement of the power control method in fig. 6, and specifically includes the following steps:

S51, receiving a first direct current signal input.

And S52, converting the first direct current signal into a first alternating current signal.

And S53, adjusting the first alternating current signal into a resonance current signal.

And S54, converting the resonance current signal into a second alternating current signal.

S55, converting the second alternating current signal into a second direct current signal to be output to the load circuit.

The S51, S52, S53, S54 and S55 are the same as S41, S42, S43, S44 and S45 in fig. 6, and specific reference is made to S41, S42, S43, S44 and S45 and the related text descriptions thereof, and are not repeated herein.

And S56, when the first voltage signal is smaller than the voltage reference threshold value, adjusting the first driving signal from the first level to the second level, and simultaneously or delaying a set time length to adjust the second driving signal from the second level to the first level.

Specifically, the isolation transformer further comprises a primary winding, a first secondary winding and a second secondary winding, the electric energy conversion circuit further comprises a first switch sub-circuit and a second switch sub-circuit, the primary winding is coupled with the resonant circuit, the first switch sub-circuit is coupled with the first secondary winding, the second switch sub-circuit and the main control circuit and is used for being coupled with the load circuit, the second switch sub-circuit is coupled with the second secondary winding and the main control circuit, and the primary winding is coupled with the first secondary winding and the second secondary winding.

The first control signal specifically further includes a first driving signal and a second driving signal, the second alternating current signal specifically further includes a first voltage signal at two ends of the first secondary winding and a second voltage signal at two ends of the second secondary winding, the set reference threshold is specifically a voltage reference threshold, and the voltage reference threshold is greater than 0 and close to 0.

The main control circuit is specifically configured to acquire the first voltage signal and the second voltage signal, and when determining that the first voltage signal is smaller than a voltage reference threshold, adjust the first driving signal from a first level to a second level, and simultaneously or delay a set period of time to adjust the second driving signal from the second level to the first level.

And S57, when the second voltage signal is smaller than the voltage reference threshold value, adjusting the second driving signal from the first level to the second level, and simultaneously or delaying a set time length to adjust the first driving signal from the second level to the first level.

And when the main control circuit determines that the second voltage signal is smaller than the voltage reference threshold, the second driving signal is specifically adjusted from the first level to the second level, and the first driving signal is simultaneously or delayed for a set time length to be adjusted from the second level to the first level, so that the level states of the first driving signal and the second driving signal are adjusted according to the periodic cycle, and the first driving signal and the second driving signal are obtained.

It should be noted that the set duration may be specifically determined according to a delay time, that is, a dead time, of the first switch sub-circuit and the second switch sub-circuit triggering on or off, which is not limited in the present application.

In addition, the first driving signal may specifically trigger the first switch sub-circuit to be turned on when the first level is reached, and trigger the first switch sub-circuit to be turned off when the second level is reached, and the second driving signal and the second switch sub-circuit are the same and are not described herein.

And S58, adjusting the second direct current signal by utilizing the first driving signal and the second driving signal.

The first switch sub-circuit is used for receiving a first driving signal to change the switch state under the action of the first driving signal, and the second switch sub-circuit is used for receiving a second driving signal to change the switch state under the action of the second driving signal and is matched with the switch state of the first switch sub-circuit to convert the second alternating current signal into a second direct current signal.

And S59, utilizing negative current in the second alternating current signal to boost the resonance current signal.

Further, the first switch sub-circuit is further configured to cooperate with a switch state of the second switch sub-circuit to boost energy storage of the resonant circuit, that is, a resonant current signal, by using a negative current in the second ac signal.

It can be understood that, because the voltage reference threshold is greater than 0 and is close to 0, and the first switch sub-circuit and the second switch sub-circuit are connected in series between the isolation transformer and the load circuit, when the first voltage signal is smaller than the voltage reference threshold, the first driving signal is adjusted from the first level to the second level to trigger the first switch sub-circuit to be turned off, so that the negative current in the second alternating current signal can be effectively returned to the primary side of the isolation transformer to improve the energy storage of the resonant circuit, and the energy storage of the resonant circuit can be utilized to effectively prolong the power-down holding time, and the second driving signal and the second switch sub-circuit are the same and are not repeated herein.

And S510, when the first direct current signal is lower than the first voltage threshold value, prolonging the holding time of the second direct current signal within the second threshold value range by utilizing the boosted resonant current signal.

The S510 is the same as S49 in fig. 6, please refer to S49 and the related text descriptions thereof, and the detailed description is omitted herein.

Referring to fig. 8, fig. 8 is a flowchart of a third embodiment of the power control method according to the present application. The power control method of the present embodiment is a flowchart of a refinement of the power control method in fig. 6, and specifically includes the following steps:

S61, receiving a first direct current signal input.

And S62, converting the first direct current signal into a first alternating current signal.

And S63, adjusting the first alternating current signal into a resonance current signal.

And S64, converting the resonance current signal into a second alternating current signal.

S65, converting the second alternating current signal into a second direct current signal to be output to the load circuit.

The S61, S62, S63, S64 and S65 are the same as S41, S42, S43, S44 and S45 in fig. 6, and specific reference is made to S41, S42, S43, S44 and S45 and the related text descriptions thereof, and are not repeated herein.

And S66, when the first current signal is smaller than the current reference threshold value, adjusting the first driving signal from the first level to the second level, and simultaneously or delaying a set time length to adjust the second driving signal from the second level to the first level.

The first control signal specifically further includes a first driving signal and a second driving signal, the second alternating current signal specifically further includes a first current signal flowing through the first switch sub-circuit and a second current signal flowing through the first switch sub-circuit, the set reference threshold is specifically a current reference threshold, and a difference value between the current reference threshold and 0 is a set current amplitude, and specifically may be greater than 0, less than 0 or equal to 0. When the current reference threshold is greater than 0, the set current amplitude may specifically correspond to a delay stage of the switching operation of the electric energy conversion circuit, and the second ac signal may be reduced from the current reference threshold to a current amplitude corresponding to 0.

The main control circuit is specifically configured to acquire the first current signal and the second current signal, and when determining that the first current signal is smaller than a current reference threshold, adjust the first driving signal from a first level to a second level, and simultaneously or delay a set period of time to adjust the second driving signal from the second level to the first level.

And S67, when the second current signal is smaller than the current reference threshold value, adjusting the second driving signal from the first level to the second level, and simultaneously or delaying a set time length to adjust the first driving signal from the second level to the first level.

When the main control circuit determines that the second current signal is smaller than the current reference threshold, the second driving signal is specifically adjusted from the first level to the second level, and the first driving signal is adjusted from the second level to the first level at the same time or in a delay setting time length, so that the level states of the first driving signal and the second driving signal are adjusted according to the periodic cycle, and the first driving signal and the second driving signal are obtained.

And S68, adjusting the second direct current signal by using the first driving signal and the second driving signal.

And S69, utilizing negative currents smaller than a current reference threshold value in the first current signal and the second current signal to boost the resonance current signal.

Further, the first switch sub-circuit is further configured to cooperate with a switch state of the second switch sub-circuit to boost energy storage of the resonant circuit, that is, the resonant current signal, by using a negative current in the second ac signal or a negative current in the second ac signal that is less than a set reference threshold.

It can be understood that, because the current reference threshold is equal to 0 or is close to 0, and the first switch sub-circuit and the second switch sub-circuit are connected in series between the isolation transformer and the load circuit, when the first current signal is smaller than the current reference threshold, the first driving signal is adjusted from the first level to the second level to trigger the first switch sub-circuit to be turned off, so that the negative current in the second alternating current signal or the negative current smaller than the current reference threshold in the second alternating current signal can be effectively returned to the primary side of the isolation transformer, so as to improve the energy storage of the resonant circuit, thereby effectively prolonging the power-down holding time by utilizing the energy storage of the resonant circuit, and the second driving signal and the second switch sub-circuit are the same and are not repeated herein.

And S610, when the first direct current signal is lower than the first voltage threshold value, prolonging the holding time of the second direct current signal within the second threshold value range by utilizing the boosted resonant current signal.

In the embodiment, S610 is the same as S49 in fig. 6, please refer to S49 and the related text descriptions thereof, and the detailed description is omitted herein.

It should be understood that, in some other embodiments, the power supply adjusting circuit specifically further includes some other more specific circuit units, so that other more specific control methods can be correspondingly implemented, and detailed descriptions will be omitted herein with reference to fig. 1-5 and related text.

Referring to fig. 9, fig. 9 is a schematic diagram of a frame of an embodiment of the electronic device according to the present application. In the present embodiment, the electronic device 70 includes a housing 71 and a power supply adjusting circuit 72 connected to the housing 71.

Alternatively, the electronic device 70 may be any reasonable electronic mechanical device, such as a server, a computer, an intelligent communication device, and the application is not limited thereto.

It should be noted that, the power supply adjusting circuit 72 described in this embodiment is the power supply adjusting circuit 10, the power supply adjusting circuit 20 or the power supply adjusting circuit 30 described in any of the above embodiments, and detailed descriptions thereof are omitted herein with reference to fig. 1-5 and related text.

The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application or directly or indirectly applied to other related technical fields are included in the scope of the present application.

Claims

1. A power supply regulation circuit, the power supply regulation circuit comprising:

The inverter circuit is used for receiving a first direct current signal input so as to convert the first direct current signal into a first alternating current signal;

the resonant circuit is coupled with the inverter circuit to receive the first alternating current signal sent by the inverter circuit and adjust the first alternating current signal into a resonant current signal;

The isolation transformer is coupled with the resonant circuit, is used for receiving the resonant current signal sent by the resonant circuit and converting the resonant current signal into a second alternating current signal, and comprises a primary winding, a first secondary winding and a second secondary winding, wherein the first secondary winding and the second secondary winding are coupled with the primary winding;

The power conversion circuit is coupled with the isolation transformer, is used for being coupled with a load circuit, receives the second alternating current signal sent by the isolation transformer, converts the second alternating current signal into a second direct current signal and outputs the second direct current signal to the load circuit, and further comprises a first switch sub-circuit and a second switch sub-circuit, wherein the primary winding is coupled with the resonance circuit, the first switch sub-circuit is coupled with the first secondary winding, the second switch sub-circuit and the main control circuit, and is used for being coupled with the load circuit, and the second switch sub-circuit is coupled with the second secondary winding and the main control circuit;

The main control circuit is coupled with the electric energy conversion circuit, and acquires the second alternating current signal in the electric energy conversion circuit to compare the second alternating current signal with a set reference threshold value to obtain a first control signal, wherein the first control signal comprises a first driving signal and a second driving signal;

the electric energy conversion circuit receives the first control signal, converts the second alternating current signal into the second direct current signal by using the first control signal, and increases the energy storage of the resonant circuit by using the negative current in the second alternating current signal or the negative current smaller than the set reference threshold value, so that the energy storage of the resonant circuit is utilized to prolong the retention time of the second direct current signal in the second voltage threshold value when the first direct current signal is lower than the first voltage threshold value;

The main control circuit is used for acquiring the first voltage signal and the second voltage signal so as to adjust the first driving signal from a first level to a second level when the first voltage signal is smaller than the voltage reference threshold, and simultaneously or delayed for a set period of time, adjust the second driving signal from the second level to the first level, and adjust the second driving signal from the first level to the second level when the second voltage signal is smaller than the voltage reference threshold, and simultaneously or delayed for a set period of time, and adjust the first driving signal from the second level to the first level when the second voltage signal is larger than 0;

the first switch sub-circuit and the second switch sub-circuit are respectively used for receiving the first driving signal and the second driving signal so as to utilize the first driving signal and the second driving signal to adjust the second direct current signal and the energy storage of the resonant circuit.

2. The power conditioning circuit of claim 1, wherein,

The main control circuit is further configured to obtain the second dc signal in the electrical energy conversion circuit, so as to compare the second ac signal with the set reference threshold value to obtain the first control signal when the voltage of the second dc signal is greater than the voltage of the second ac signal.

3. The power conditioning circuit of claim 1, wherein,

The second alternating current signal comprises a first current signal flowing through the first switch sub-circuit and a second current signal flowing through the first switch sub-circuit, the set reference threshold is a current reference threshold, the main control circuit is used for acquiring the first current signal and the second current signal so as to adjust the first driving signal from the first level to the second level when the first current signal is smaller than the current reference threshold, and simultaneously or delay the set time period to adjust the second driving signal from the second level to the first level, and adjust the second driving signal from the first level to the second level when the second current signal is smaller than the current reference threshold, and simultaneously or delay the set time period to adjust the first driving signal from the second level to the first level, wherein the difference value between the current reference threshold and 0 is a set current amplitude.

4. The power conditioning circuit of claim 3, wherein,

The master control circuit further comprises a first sampling circuit, a second sampling circuit, a first proportional filtering corrector circuit and a control sub-circuit, wherein the first sampling circuit is coupled with the first switch sub-circuit and the first proportional filtering corrector circuit, the second sampling circuit is coupled with the second switch sub-circuit and the first proportional filtering corrector circuit, the first proportional filtering corrector circuit is coupled with the control sub-circuit, and the control sub-circuit is coupled with the first switch sub-circuit and the second switch sub-circuit;

The first sampling circuit is used for sampling and acquiring the first voltage signals at two ends of the first secondary winding and/or the first current signals in the first switch sub-circuit;

the second sampling circuit is used for sampling and acquiring the second voltage signals at two ends of the second secondary winding and/or the second current signals in the second switch sub-circuit;

The first proportional filtering corrector circuit is used for receiving the first voltage signal and the second voltage signal, and sequentially filtering and correcting the first voltage signal and the second voltage signal to obtain a first filtering signal and a second filtering signal; and/or the first proportional filtering and correcting sub-circuit is used for receiving the first current signal and the second current signal, so as to respectively filter and correct the first current signal and the second current signal in sequence to obtain a first filtering signal and a second filtering signal;

The control sub-circuit is configured to receive the first filtered signal and the second filtered signal to generate the first drive signal and the second drive signal using the first filtered signal and the second filtered signal, respectively.

5. The power conditioning circuit of claim 3, wherein,

The inverter circuit comprises a first switching tube, a second switching tube, a third switching tube and a fourth switching tube, and the resonant circuit comprises a resonant capacitor and a resonant inductor;

the first end of the first switching tube is coupled to the first end of the third switching tube and is used for being coupled to the first end of the direct-current power supply, the second end of the second switching tube is coupled to the second end of the fourth switching tube and is used for being coupled to the first end of the direct-current power supply, the second end of the first switching tube is coupled to the first end of the second switching tube and the first end of the resonance capacitor, the second end of the third switching tube is coupled to the first end of the fourth switching tube and the second end of the primary winding, the second end of the resonance capacitor is coupled to the first end of the resonance inductor, the second end of the resonance inductor is coupled to the first end of the primary winding, and the third ends of the first switching tube, the second switching tube, the third switching tube and the fourth switching tube are coupled to the master control circuit.

6. The power conditioning circuit of claim 5, wherein the power supply circuit further comprises a power supply circuit,

The power supply regulating circuit further comprises an excitation inductor and a voltage stabilizing output circuit, the voltage stabilizing output circuit comprises a voltage stabilizing resistor and a voltage stabilizing capacitor, the first switch sub-circuit comprises a fifth switch tube, and the second switch sub-circuit comprises a sixth switch tube;

The first end of the primary winding is coupled to the first end of the resonant inductor and the first end of the exciting inductor, the second end of the primary winding is coupled to the second end of the third switching tube, the first end of the fourth switching tube and the second end of the exciting inductor, the first end of the first secondary winding is coupled to the first end of the fifth switching tube, the second end of the fifth switching tube is coupled to the first end of the voltage stabilizing resistor and the second end of the sixth switching tube and is used for being coupled to the first end of the load circuit, the second end of the first secondary winding is coupled to the first end of the second secondary winding and the second end of the voltage stabilizing capacitor and is used for being coupled to the second end of the load circuit, the second end of the voltage stabilizing resistor is coupled to the first end of the voltage stabilizing capacitor, the second end of the third secondary winding is coupled to the first end of the sixth switching tube, and the third end of the fifth switching tube and the third end of the voltage stabilizing capacitor are coupled to the master control circuit.

7. The power conditioning circuit of claim 6, wherein the power supply circuit further comprises a power supply circuit,

The main control circuit is further used for acquiring the second direct current signal, comparing the voltage of the second direct current signal with a third voltage threshold value to determine signal frequencies of a third driving signal and a fourth driving signal, and sending the third driving signal and the fourth driving signal according to the signal frequencies;

The first switching tube and the fourth switching tube are used for receiving the third driving signal, and the second switching tube and the third switching tube are used for receiving the fourth driving signal so as to convert the first direct current signal into the first alternating current signal by utilizing the third driving signal and the fourth driving signal.

8. A power supply control method, characterized by comprising:

receiving a first direct current signal input;

converting the first direct current signal into a first alternating current signal;

adjusting the first alternating current signal to a resonant current signal;

converting the resonant current signal to a second alternating current signal;

Converting the second alternating current signal into a second direct current signal to be output to a load circuit;

The step of comparing the second alternating current signal with a set reference threshold value to obtain a first control signal comprises adjusting the first drive signal from a first level to a second level and adjusting the second drive signal from the second level to the first level simultaneously or for a set period of time when the first voltage signal is smaller than the voltage reference threshold value, and adjusting the second drive signal from the first level to the second level simultaneously or for a set period of time when the second voltage signal is smaller than the voltage reference threshold value, wherein the voltage reference threshold value is larger than 0;

The step of adjusting the second direct current signal by the first control signal comprises adjusting the second direct current signal by the first driving signal and the second driving signal;

The step of utilizing the negative current in the second alternating current signal to boost the resonant current signal, wherein the step of utilizing the negative current in the second alternating current signal which is smaller than the set reference threshold value to boost the resonant current signal comprises the steps of utilizing the negative current in the second alternating current signal to boost the resonant current signal;

and when the first direct current signal is lower than a first voltage threshold value, prolonging the retention time of the second direct current signal within a second threshold value range by using the boosted resonant current signal.

9. The power control method according to claim 8, wherein the set reference threshold is a current reference threshold, the second ac signal includes a first current signal and a second current signal, the first control signal includes a first driving signal and a second driving signal, and the step of comparing the second ac signal with the set reference threshold to obtain the first control signal includes:

When the first current signal is smaller than the current reference threshold value, the first driving signal is adjusted from a first level to a second level, and the second driving signal is adjusted from the second level to the first level at the same time or in a delayed set time length, wherein the difference value between the current reference threshold value and 0 is the set current amplitude;

Adjusting the second drive signal from the first level to the second level when the second current signal is less than the current reference threshold, and adjusting the first drive signal from the second level to the first level simultaneously or with a delay set period of time;

the step of adjusting the second direct current signal using the first control signal comprises:

adjusting the second direct current signal using the first drive signal and the second drive signal;

The step of boosting the resonant current signal with a negative current less than the current reference threshold in the second ac signal comprises:

And lifting the resonant current signal by using negative currents smaller than the current reference threshold value in the first current signal and the second current signal.

10. An electronic device, comprising a housing and a power supply regulating circuit connected to the housing;

Wherein the power supply regulating circuit is a power supply regulating circuit as claimed in any one of claims 1-7.