Voltage compensation method, voltage compensation circuit, and electronic equipment

Abstract

The present application discloses a voltage compensation method, a voltage compensation circuit, and an electronic device. The voltage compensation method includes: the voltage compensation circuit sends a voltage given signal and a drive control signal to a power supply isolation circuit, so that the power supply isolation circuit uses the voltage given signal to obtain a power supply output signal under the action of the drive control signal, and sends it to the power supply output circuit; short-circuit detection is performed on the power supply isolation circuit in the short-circuit detection stage when the drive control signal is at the first level; the isolation voltage drop in the power supply isolation circuit is obtained in the short-circuit detection stage and its corresponding delay compensation stage; the isolation voltage drop is used to compensate the voltage given signal, so that the power supply isolation circuit uses the compensated voltage given signal to maintain the power supply output signal within a set threshold range. In the above manner, the voltage compensation method of the present application can effectively reduce the output voltage drop during the short-circuit detection process of the power supply isolation circuit, ensure the power supply stability, and have good adaptability.

Description

Technical Field

[0001] The present application relates to the field of circuit control technology, and in particular to a voltage compensation method, a voltage compensation circuit, and an electronic device. Background Art

[0002] Nowadays, in the power supply of electronic devices, especially those involving multiple power supplies in redundant mode, to prevent single-point failures from causing failures in the system with multiple power supplies, the output of each power supply needs to be configured with an isolation circuit. The isolation circuit usually consists of a switching tube and a parallel diode. In the event of a power failure or hot-swap operation, the corresponding power supply can be removed from the system power bus by controlling the switching tube.

[0003] To monitor the operating status of each power supply, short-circuit detection is typically required on the isolation circuit. This short-circuit detection requires shutting down the switch in the isolation circuit, causing the power supply output current to flow through the parallel diode. However, because the diode's forward voltage drop is much greater than the voltage drop when the switch is fully turned on, the diode's forward voltage drop is immediately reflected on the power supply output voltage, causing the output current of the tested power supply to quickly drop to zero. This results in the tested power supply being unloaded for almost the entire short-circuit detection process, causing the power supply output voltage to drop and being unable to share current with other power supplies in the system. This leads to unstable power supply and affects the normal operation of the load equipment. Summary of the Invention

[0004] The main technical problem solved by the present application is to provide a voltage compensation method, a voltage compensation circuit and an electronic device, which can solve the problem in the related technology that during the short-circuit detection of the power isolation circuit, the power supply output voltage drops and cannot be shared with other power supplies in the system, thereby causing unstable power supply and affecting the normal operation of the load equipment.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a voltage compensation method, which is applied to voltage compensation in short circuit detection of a power isolation circuit, wherein the power isolation circuit includes a power isolation circuit, and the power isolation circuit is used to couple with a voltage compensation circuit and a power supply output circuit, wherein the voltage compensation method includes: the voltage compensation circuit sends a voltage given signal and a drive control signal to the power isolation circuit, so that the power isolation circuit obtains a power supply output signal using the voltage given signal under the action of the drive control signal, and sends it to the power supply output circuit; short circuit detection is performed on the power isolation circuit in the short circuit detection stage when the drive control signal is at the first level; the isolation voltage drop in the power isolation circuit is obtained in the short circuit detection stage and its corresponding delay compensation stage; and the isolation voltage drop is used to compensate the voltage given signal, so that the power isolation circuit maintains the power supply output signal within a set threshold range using the compensated voltage given signal.

[0006] Among them, the voltage compensation circuit sends the voltage given signal and the drive control signal to the power supply isolation circuit, so that the power supply isolation circuit uses the voltage given signal under the action of the drive control signal to obtain the power supply output signal, and before the step of sending it to the power supply output circuit, it also includes: using the reference voltage signal to obtain the voltage given signal; using the isolation voltage drop to compensate for the voltage given signal includes: superimposing the isolation voltage drop on the reference voltage signal to compensate for the voltage given signal.

[0007] Among them, superimposing the isolation voltage drop on the reference voltage signal to compensate for the voltage given signal includes: in the first switching delay stage corresponding to the adjustment of the drive control signal from the second level to the first level, using the first setting function to adjust and increase the reference voltage signal, so as to obtain the compensated voltage given signal by using the adjusted increased reference voltage signal; in the second switching delay stage corresponding to the adjustment of the drive control signal from the first level to the second level, using the second setting function to adjust and decrease the reference voltage signal, so as to obtain the compensated voltage given signal by using the adjusted decreased reference voltage signal; wherein the duration of the second switching delay stage is less than the duration of the delay compensation stage.

[0008] Among them, the first switching delay stage corresponding to the adjustment of the driving control signal from the second level to the first level includes: when the driving control signal is adjusted from the second level to the first level, the power isolation circuit is charged and discharged to extend the switching process of the power isolation circuit to obtain the first switching delay stage; the second switching delay stage corresponding to the adjustment of the driving control signal from the first level to the second level includes: when the driving control signal is adjusted from the first level to the second level, the power isolation circuit is charged and discharged to extend the switching process of the power isolation circuit to obtain the second switching delay stage.

[0009] Among them, superimposing the isolation voltage drop on the reference voltage signal to compensate for the voltage given signal includes: in response to the drive control signal being adjusted from the second level to the first level, compensating the reference voltage signal by increasing the first voltage value at each interval set time until the cumulative compensation increase value is equal to the steady-state value of the isolation voltage drop, so as to obtain the compensated voltage given signal by using the compensated increased reference voltage signal; in response to the drive control signal being adjusted from the first level to the second level, compensating the reference voltage signal by decreasing the second voltage value at each interval set time until the cumulative compensation decrease value is equal to the steady-state value, so as to obtain the compensated voltage given signal by using the compensated decreased reference voltage signal.

[0010] In which, the power isolation circuit includes a switching sub-circuit, which is used to couple with the voltage compensation circuit and the power supply output circuit. Obtaining the isolation voltage drop in the power isolation circuit during the short circuit detection stage and its corresponding delay compensation stage includes: obtaining the voltage given signal on the second end of the switching sub-circuit and the power supply output signal on the third end thereof during the short circuit detection stage and its corresponding delay compensation stage; wherein, when the driving control signal received at the first end of the switching sub-circuit is the second level, the second end and the third end of the switching sub-circuit are triggered to turn on; and the voltage given signal and the power supply output signal are differentially amplified to obtain the isolation voltage drop.

[0011] Among them, obtaining the isolation voltage drop in the power isolation circuit in the short-circuit detection stage and its corresponding delay compensation stage includes: detecting whether the drive control signal is a first level; if the drive control signal is the first level, setting the voltage compensation flag; if the drive control signal is not the first level, clearing the voltage compensation flag after a preset delay; wherein the preset time is equal to the duration of the delay compensation stage; using the isolation voltage drop compensation voltage given signal includes: detecting whether the voltage compensation flag is valid; if the voltage compensation flag is valid, using the isolation voltage drop compensation voltage given signal.

[0012] Among them, short-circuit detection of the power isolation circuit in the short-circuit detection stage when the drive control signal is at the first level includes: in the short-circuit detection stage when the drive control signal is at the first level, detecting whether the isolation voltage drop is lower than a preset voltage threshold; if the isolation voltage drop is lower than the preset voltage threshold, adjusting the voltage given signal to 0.

[0013] In order to solve the above technical problems, another technical solution adopted in this application is: to provide a voltage compensation circuit, wherein the voltage compensation circuit is used to couple with the power isolation circuit, and the power isolation circuit is used to couple with the power supply output circuit; wherein the voltage compensation circuit is used to implement voltage compensation control of the power isolation circuit using the voltage compensation method described in any of the above items.

[0014] In order to solve the above technical problems, another technical solution adopted in this application is: to provide an electronic device, wherein the electronic device includes a shell and a voltage compensation circuit connected to the shell; wherein the voltage compensation circuit is the voltage compensation circuit as described above.

[0015] The beneficial effects of the present application are: different from the existing technology, the voltage compensation method provided by the present application sends the voltage given signal and the drive control signal to the power supply isolation circuit through the voltage compensation circuit, so that the power supply isolation circuit uses the voltage given signal to obtain the power supply output signal under the action of the drive control signal, and sends it to the power supply output circuit, so as to perform short-circuit detection on the power supply isolation circuit in the short-circuit detection stage when the drive control signal is at the first level, and obtain the isolation voltage drop in the power supply isolation circuit in the short-circuit detection stage and its corresponding delay compensation stage, and use the isolation voltage drop to compensate the voltage given signal, so that the power supply isolation circuit uses the compensated voltage given signal to maintain the power supply output signal within the set threshold range. Therefore, in the short-circuit detection of the power isolation circuit, the isolation voltage drop in the power isolation circuit can be used to compensate the voltage given signal, effectively reducing the output voltage drop during the short-circuit detection process of the power isolation circuit, so as to ensure that in the redundant mode where multiple power isolation circuits jointly supply power to the power output circuit, the detected power isolation circuit can still share current with other power isolation circuits in the system to ensure power supply balance and stability, thereby maintaining the normal operation of the load equipment; and compensating the voltage given signal by sampling the isolation voltage drop in the power isolation circuit is a closed-loop control solution with good adaptability, which can effectively avoid the mismatch problem caused by the differences of each power isolation circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0017] Figure 1 This is a flow chart of the first embodiment of the voltage compensation method of the present application;

[0018] Figure 2 This is a schematic structural diagram of a first embodiment of the voltage compensation circuit of the present application;

[0019] Figure 3 This is a flow chart of the second embodiment of the voltage compensation method of the present application;

[0020] Figure 4 yes Figure 3 A schematic diagram of a flow chart of an embodiment of S24;

[0021] Figure 5 This is a schematic structural diagram of a second embodiment of the voltage compensation circuit of the present application;

[0022] Figure 6 yes Figure 5Waveform diagram of short-circuit detection in the power isolation circuit in redundant mode;

[0023] Figure 7 It is a waveform diagram of the characteristic curve of the non-saturated region of the switching tube;

[0024] Figure 8 This is a waveform diagram of short circuit detection performed by the power isolation circuit of the present application in the redundant mode after the voltage compensation circuit performs compensation;

[0025] Figure 9 This is a schematic structural diagram of a third embodiment of the voltage compensation circuit of the present application;

[0026] Figure 10 yes Figure 3 A schematic diagram of a flow chart of an embodiment of S25;

[0027] Figure 11 yes Figure 3 A schematic diagram of a process flow of another embodiment of S25;

[0028] Figure 12 This is a flow chart of the third embodiment of the voltage compensation method of the present application;

[0029] Figure 13 2 is a flow chart of a fourth embodiment of the voltage compensation method of the present application;

[0030] Figure 14 It is a structural diagram of an embodiment of the electronic device of the present application. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0032] The terms "first," "second," and "third" in this application are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features identified. Therefore, features specified as "first," "second," or "third" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined. All directional designations (such as up, down, left, right, front, back, etc.) in the embodiments of this application are intended only to illustrate the relative positional relationships and movement of components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional designations will also change accordingly. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to such process, method, product, or apparatus.

[0033] 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 present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0034] The present application is described in detail below with reference to the accompanying drawings and implementation methods.

[0035] Please refer to Figure 1 and Figure 2 ,in, Figure 1 This is a flow chart of the first embodiment of the voltage compensation method of the present application. Figure 2 This is a schematic diagram of the structure of the first embodiment of the voltage compensation circuit of the present application. Specifically, it can include the following steps:

[0036] S11: The voltage compensation circuit sends the voltage setting signal and the drive control signal to the power isolation circuit, so that the power isolation circuit uses the voltage setting signal under the action of the drive control signal to obtain a power output signal and sends it to the power output circuit.

[0037] It is understandable that the voltage compensation method in this embodiment is specifically applied to the following Figure 2The first voltage compensation circuit 300 shown performs voltage compensation on the power supply output signal of the power isolation circuit 100 during the short circuit detection process of the power isolation circuit 100. The power isolation circuit 100 is used to couple with the first voltage compensation circuit 300 and the power supply output circuit 200; wherein, the first voltage compensation circuit 300 is used to control the power isolation circuit 100 using any voltage compensation method described in any one of the items in this document.

[0038] It is worth noting that the power isolation circuit 100 refers to a functional circuit that can isolate and regulate any reasonable DC or AC power supply, such as a battery, a DC voltage regulator, a photovoltaic power supply, an energy storage power supply, a power grid, a photovoltaic power supply, an independent generator or an AC motor, so as to power a load device, such as a server, a storage device, a network device or a switch, or any reasonable electronic device, through the power output circuit 200; or, a functional circuit that receives a power output signal after power conversion and regulation of any reasonable upper power supply, such as a battery, a DC voltage regulator, a photovoltaic power supply, an energy storage power supply, a power grid, a photovoltaic power supply, an independent generator or an AC motor, so as to isolate and regulate the power output signal, and power the load device through the power output circuit 200. This embodiment does not impose any restrictions on this.

[0039] Among them, the number of the power isolation circuits 100 can be specifically one or more, and when the number of the power isolation circuits 100 is multiple, the first voltage compensation circuit 300 can be specifically one or more, so as to perform voltage compensation on the power isolation circuit 100 in the short circuit detection process during the power supply process of each power isolation circuit 100, so that each power isolation circuit 100 uses the compensated voltage given signal to send a corresponding power supply output signal to the power supply output circuit 200, and after the power supply output circuit 200 shares the current, it supplies power to the load device. This embodiment does not limit this.

[0040] Furthermore, the term "coupled" as used herein encompasses both direct and indirect connection methods. Therefore, if a first circuit is described as being coupled to a second circuit, this means that the first circuit may be directly connected to the second circuit via electrical connection, wireless transmission, optical transmission, or other signal connection methods, or may be indirectly connected to the second circuit via other circuits or connection methods.

[0041] In some embodiments, the first voltage compensation circuit 300 may specifically include a DSP (Digital Signal Processing) chip, a control chip, an MCU (Micro Controller 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 other reasonable circuit unit with signal processing function to achieve drive control of the power isolation circuit 100 and voltage compensation during its short-circuit detection process. This application does not limit this.

[0042] Specifically, the first voltage compensation circuit 300 uses its internal power supply, or receives a power output signal provided by an external power supply to send a corresponding voltage given signal to the power isolation circuit 100, and generates a drive control signal according to the current preset control program, or the detected operating status of the power isolation circuit 100, to send to the power isolation circuit 100, so that the power isolation circuit 100 changes its working state under the action of the drive control signal, such as turning on, turning off or adjusting the voltage given signal to obtain a power output signal, and send it to the power output circuit 200.

[0043] It is worth noting that the power supply output circuit 200 can specifically be a functional circuit in an electrical load device, or it can be a back-end functional circuit that uses the power supply output signal to realize any other reasonable signal functions such as power regulation, energy storage, current sharing, etc.; and when there are multiple power isolation circuits 100, the power supply output circuit 200 can specifically be a power supply bus, which can be used to share the power supply output signals of each power isolation circuit 100 and then supply power to the electrical load device. This application does not limit this.

[0044] S12: performing short-circuit detection on the power isolation circuit in a short-circuit detection phase when the driving control signal is at the first level.

[0045] It is understandable that during the short-circuit detection process of the power isolation circuit 100, the first voltage compensation circuit 300 will turn off the drive control of the power isolation circuit 100, or trigger the switch tube in the power isolation circuit 100 to turn off, so as to detect the voltage of the non-control end of the switch tube to determine whether a short-circuit fault occurs in the power isolation circuit 100.

[0046] Among them, taking the example that the driving control signal is at the first level and triggers the power isolation circuit 100 to shut down, when the first voltage compensation circuit 300 adjusts the driving control signal sent to the power isolation circuit 100 to the first level, the power isolation circuit 100 can be short-circuited. For example, it is detected whether an abnormally low impedance path (i.e., a short circuit) appears in the power isolation circuit 100 to avoid damage to the entire system. The driving control signal corresponds to the first level, and the time interval for short-circuit detection of the power isolation circuit 100 is the short-circuit detection stage.

[0047] In some embodiments, the first level may be a high level or a low level, and may be a level state that triggers the power isolation circuit 100 to be turned off. This application does not limit this.

[0048] S13: Obtaining the isolation voltage drop in the power isolation circuit during the short circuit detection phase and its corresponding delay compensation phase.

[0049] Specifically, the first voltage compensation circuit 300 collects the isolation voltage drop in the power isolation circuit 100 during the short circuit detection phase and the subsequent delay compensation phase.

[0050] The delay compensation phase can be understood as a specific delay interval starting from the end of the short-circuit detection phase, which is set to ensure that there is enough time for the system to recover from the detection state to the normal working state after the short-circuit detection.

[0051] The isolation voltage drop can be understood as the voltage between the two non-control terminals of the power isolation circuit 100 when it is triggered to turn on or off under the action of the driving control signal. It is used to feedback the voltage change during the switching operation and determine the open circuit state, short circuit state, and normal on and off state inside the power isolation circuit 100.

[0052] S14: Using the isolation voltage drop to compensate for the voltage given signal, so that the power isolation circuit uses the compensated voltage given signal to maintain the power supply output signal within a set threshold range.

[0053] It is understandable that during the short-circuit detection stage of the power isolation circuit 100, since the power isolation circuit 100 is triggered to shut down, or the first voltage compensation circuit 300 turns off the drive to the power isolation circuit 100, the corresponding voltage given signal will attenuate and decrease in the power supply output signal obtained through the power isolation circuit 100, especially the current output signal in the power supply output signal will decrease quickly, and the detected power isolation circuit 100 will be in a reduced load or even no-load state during the entire short-circuit detection stage. In order to avoid the power supply output signal from decreasing, it is necessary to increase the voltage given signal, or perform a certain amplitude of voltage compensation on the voltage given signal.

[0054] Specifically, the first voltage compensation circuit 300 uses the sampled isolation voltage drop to compensate the voltage given signal in the short circuit detection stage and the delay compensation stage to increase the voltage amplitude of the voltage given signal, and the compensation amount can specifically correspond to the voltage amplitude of the isolation voltage drop, so that the power supply output signal obtained by the power isolation circuit 100 using the compensated voltage given signal can still be maintained within the set threshold range in the short circuit detection stage and the delay compensation stage.

[0055] It is worth noting that the set threshold range can be specifically understood as the voltage threshold range in which the voltage output signal in the power output signal output to the power output circuit 200 is located when the power isolation circuit 100 normally supplies power to the power output circuit 200 or maintains power supply current sharing, and the current threshold range in which the current output signal is located, so as to ensure power supply balance and stability, thereby maintaining the normal operation of the load equipment.

[0056] The above scheme, by using the isolation voltage drop in the power isolation circuit 100 to compensate for the voltage given signal during the short-circuit detection of the power isolation circuit 100, effectively reduces the output voltage drop of the power isolation circuit 100 during the short-circuit detection process, so as to ensure that in the redundant mode where multiple power isolation circuits 100 jointly power the power output circuit 200, the detected power isolation circuit 100 can still share current with other power isolation circuits 100 in the system to ensure power supply balance and stability, thereby maintaining the normal operation of the load equipment; and compensating for the voltage given signal by sampling the isolation voltage drop in the power isolation circuit 100 is a closed-loop control scheme with good adaptability, which can effectively avoid the mismatch problem caused by the differences of each power isolation circuit 100.

[0057] See also Figure 3 , Figure 3 This is a flow chart of the second embodiment of the voltage compensation method of the present application. The voltage compensation method of this embodiment is Figure 1 A flow chart of a detailed implementation of the voltage compensation method in FIG. 1 specifically includes the following steps:

[0058] S21: Obtain a voltage setting signal using a reference voltage signal.

[0059] It is understandable that the first voltage compensation circuit 300 can specifically utilize an internal power supply circuit that provides a stable level state, or an external power supply circuit that provides a stable level state to obtain a reference voltage signal, and perform any reasonable adjustment such as operational amplifier or power conversion on the reference voltage signal to obtain a voltage given signal.

[0060] S22: The voltage compensation circuit sends the voltage setting signal and the drive control signal to the power isolation circuit, so that the power isolation circuit uses the voltage setting signal under the action of the drive control signal to obtain the power output signal and sends it to the power output circuit.

[0061] S23: performing short circuit detection on the power isolation circuit in a short circuit detection phase when the driving control signal is at the first level.

[0062] S24: obtaining an isolation voltage drop in the power isolation circuit during the short circuit detection phase and its corresponding delay compensation phase.

[0063] Among them, S22, S23 and S24 are respectively Figure 1 S11, S12 and S13 are the same, please refer to S11, S12 and S13 and their related text descriptions for details, which will not be repeated here.

[0064] S25: superimposing the isolation voltage drop onto the reference voltage signal to compensate for the voltage setting signal, so that the power isolation circuit maintains the power supply output signal within a set threshold range using the compensated voltage setting signal.

[0065] Specifically, the first voltage compensation circuit 300 superimposes the isolation voltage drop in the power isolation circuit 100 obtained in the short circuit detection stage and the delay compensation stage on the reference voltage signal, and then uses the reference voltage signal superimposed with the isolation voltage drop to obtain a compensated voltage given signal.

[0066] Among them, the isolation voltage drop can be understood as the voltage between the two non-control ends of the power isolation circuit 100 after the drive is turned off. After superimposing the isolation voltage drop on the reference voltage signal, the compensated voltage given signal is obtained, which can effectively compensate for the voltage drop caused by the power isolation circuit 100 turning off the drive, so that the power isolation circuit 100 uses the compensated voltage given signal to obtain the power supply output signal, which can be effectively maintained within the set threshold range during the short-circuit detection stage and the delay compensation stage.

[0067] Please continue reading Figure 4 , Figure 4 yes Figure 3 Flowchart of an embodiment of S24 in FIG. In one embodiment, the voltage compensation method of the present application includes, in addition to the above S21-S25, further including some more specific steps. Specifically, the above S24 may further include the following steps:

[0068] S241: obtaining a voltage setting signal on the second terminal of the switch sub-circuit and a power supply output signal on the third terminal thereof in a short circuit detection phase and a corresponding delay compensation phase.

[0069] See also Figure 5 , Figure 5 It is a structural diagram of the second embodiment of the voltage compensation circuit of the present application.

[0070] In some embodiments, the power isolation circuit 100 further includes a switch subcircuit 101, which is used to couple with the second voltage compensation circuit 400 and the power supply output circuit 200; and the second voltage compensation circuit 400 corresponding to the switch subcircuit 101 can also specifically include a first signal processing subcircuit 401 and a first drive subcircuit 402, and the power supply output circuit 200 can also specifically include a power supply bus 201; the switch subcircuit 101 is coupled to the first signal processing subcircuit 401 or is used to couple with an external power supply circuit (not shown) to receive the voltage given signal provided by the first signal processing subcircuit 401 or the power supply circuit, or the power supply circuit can also be integrated in the circuit. In the source isolation circuit 100 or the second voltage compensation circuit 400, a voltage given signal is provided for the switch sub-circuit 101; the first signal processing sub-circuit 401 is coupled to the first driving sub-circuit 402 and the switch sub-circuit 101, the first driving sub-circuit 402 is coupled to the switch sub-circuit 101, and the switch sub-circuit 101 is also used to couple with the power supply bus 201; the first signal processing sub-circuit 401 is used to send a driving control signal to the switch sub-circuit 101 according to a preset control program or the obtained isolation voltage drop in the switch sub-circuit 101, so as to use the driving control signal to trigger the switch sub-circuit 101 to turn on or off, so as to adjust the voltage given signal to a power supply output signal and send it to the power supply bus 201.

[0071] In some embodiments, there may be at least two switching sub-circuits 101, and each switching sub-circuit 101 may further include a switching tube (not shown) and a diode (not shown) connected in parallel with the switching tube; and the switching tube may be any reasonable power semiconductor device such as a MOSFET (Metal Oxide Semiconductor Field Effect Transistor), a high-frequency transistor, a triode, a thyristor, an IGBT (Insulated Gate Bipolar Transistor), etc., and this application does not limit this.

[0072] Among them, when the switching tube is a Mosfet, the isolation voltage drop is specifically the voltage between the source S and the drain d of the switching tube, so that when its gate g receives a driving control signal, it can trigger the source S and the drain d of the switching tube to be turned on or off.

[0073] For ease of understanding, taking the example of a case where the number of switch sub-circuits 101 is n (n is an integer greater than 1), and the switch sub-circuits 101 include switch tubes Q1, switch tubes Q2, ..., switch tubes Qn, and diodes D1, diodes D2, ..., and diodes Dn, it can be seen that each second voltage compensation circuit 400 includes a first signal processing sub-circuit 1, a first signal processing sub-circuit 2, ..., a first signal processing sub-circuit n, and a first driver sub-circuit 1, a first driver sub-circuit 2, ..., and a first driver sub-circuit n; the first signal processing sub-circuit 1 is used to provide a voltage reference signal Vout-F1 to the switch tube Q1, and to send a drive control signal Drv1 to the first driver sub-circuit 1, so that the first driver sub-circuit 1 adjusts the drive control signal Drv1 and sends it to the switch tube Q1 to trigger the switch tube Q1 to turn on or off, thereby adjusting the voltage reference signal Vout-F1 to a voltage output signal Vout1 and a current output signal Iout1, which are sent to the power supply bus 201; similarly, the first signal processing sub-circuit 2 is used to provide a voltage reference signal Vout-F1 to the switch tube Q2. The first signal processing sub-circuit n is configured to provide a given voltage signal Vout-Fn to the switch tube Q2, and send a drive control signal Drvn to the first driver sub-circuit n, so that the first driver sub-circuit n adjusts the drive control signal Drvn and sends it to the switch tube Qn to trigger the switch tube Qn to turn on or off, thereby adjusting the given voltage signal Vout-Fn to a voltage output signal Vout2 and a current output signal Iout2, which are then sent to the power supply bus 201; ...; the first signal processing sub-circuit n is configured to provide a given voltage signal Vout-Fn to the switch tube Q2, and send a drive control signal Drvn to the first driver sub-circuit n, so that the first driver sub-circuit n adjusts the drive control signal Drvn and sends it to the switch tube Qn to trigger the switch tube Qn to turn on or off, thereby adjusting the given voltage signal Vout-Fn to a voltage output signal Voutn and a current output signal Ioutn, which are then sent to the power supply bus 201; the power supply bus 201 is configured to equalize the current output signals Iout1, Iout2, ..., and Ioutn, and provide them to power load devices.

[0074] Please continue reading Figure 6 , Figure 6 yes Figure 5 Waveform diagram of short-circuit detection in the power isolation circuit in redundant mode.

[0075] It can be understood that, taking the short-circuit detection of the power isolation circuit 100 specifically including the switch tube Q1 as an example, when the short-circuit detection is performed on the switch tube Q1, the drive of the switch tube Q1 will be turned off, such as adjusting the drive control signal Drv1 from a low level to a high level, and detecting its isolation voltage drop Vsd1, that is, the voltage between the source and drain of the switch tube Q1. When the detected voltage is lower than a certain threshold below the conduction voltage of the parallel diode, it is determined that the switch tube Q1 is short-circuited.

[0076] Because the driver of switch Q1 needs to be turned off, the current of voltage-set signal Vout-F1 will flow through diode D1 connected in parallel with it. Since the conduction voltage drop of diode D1 is typically much greater than the voltage drop of switch Q1 when it is fully turned on, the source and drain of switch Q1 will immediately generate the conduction voltage drop of diode D1. In redundant mode, this will cause the voltage output signal Vout1 of the tested switch Q1 to drop, and the current output signal Iout1 to quickly drop to zero. During almost the entire short-circuit detection process, the tested switch Q1 will be in a reduced load or even no-load state, unable to share current with other power isolation circuits 100 in the system. It will not be able to share current with other power isolation circuits 100 in the system until the short-circuit detection process is exited. During the actual detection process, since the on-time t12 and off-time t11 of the switch tube Q1 are usually around 20us (microseconds), it is difficult to quickly handle this drop. Therefore, it is necessary to slow down the switching process of the switch tube Q1 to extend the on-time t12 and off-time t11 to more than 1ms (milliseconds).

[0077] Please continue reading Figure 7 , Figure 7 It is a waveform diagram of the non-saturation characteristic curve of the switching tube.

[0078] It is understood that slowing down the switching process of the switch tube Q1 can be achieved by utilizing the characteristics of the switch tube Q1 in the non-saturation range. Slowing down the charging and discharging speed of the gate during the switching process of the switch tube Q1 causes the switch tube gate-source voltage Vgs to rise and fall slowly, thereby slowly changing the isolation voltage drop Vsd1.

[0079] In some embodiments, slowing down the switching process of the switch tube Q1 can be achieved in a variety of ways: for example, adding a current limiting resistor to the gate of the switch tube Q1, or building a constant current source circuit to charge and discharge the gate, so that the gate-source voltage Vgs of the switch tube changes slowly.

[0080] It is worth noting that when the power isolation circuit 100 performing short circuit detection corresponds to the switch tube Q2 and / or the switch tube Qn, the above is handled in the same manner and will not be described in detail here.

[0081] Please continue reading Figure 8 and Figure 9 ,in, Figure 8 This is a waveform diagram of the power isolation circuit of the present application performing short circuit detection in the redundant mode after the voltage compensation circuit performs compensation. Figure 9 It is a structural diagram of the third embodiment of the voltage compensation circuit of the present application.

[0082] It is understandable that, in some embodiments, the power isolation circuit 100 further includes a switch subcircuit 101, which is used to couple with the third voltage compensation circuit 500 and the power output circuit (not shown in the figure); and the third voltage compensation circuit 500 further includes a second signal processing subcircuit 501, a second driving subcircuit 502, a control subcircuit 503, a switching power conversion subcircuit 504 and a differential operational amplifier subcircuit 505, and the power output circuit may further include a power supply bus (not shown in the figure); the switch subcircuit 101 is coupled to the second driving subcircuit 502, the switching power conversion subcircuit 504 and the differential operational amplifier subcircuit 505, and is used to couple with the power supply bus; the second signal processing subcircuit 501 01 is coupled to the second driving sub-circuit 502, the control sub-circuit 503 and the differential operational amplifier sub-circuit 505; the control sub-circuit 503 is coupled to the switching power conversion sub-circuit 504; the second signal processing sub-circuit 501 is used to send a driving control signal Drv to the second driving sub-circuit 502 according to a preset control program or the isolation voltage drop Vsd in the switching sub-circuit 101 obtained by the differential operational amplifier sub-circuit 505, so that the second driving sub-circuit 502 adjusts the driving control signal Drv and uses the adjusted driving control signal Drv to trigger the switching sub-circuit 101 to turn on or off, so as to adjust the voltage setting signal Vout-F into a power supply output signal, namely, a voltage output signal Vout and a current output signal Iout, and send them to the power supply bus.

[0083] The switch sub-circuit 101 specifically further includes a switch tube Q and a diode D connected in parallel, and the number thereof can be at least two. The corresponding switch tube Q and diode D can be specifically understood as follows: Figure 5 Any one of the switch tube Q1 and diode D1, or the switch tube Q2 and diode D2, etc. shown in the figure; wherein, when the switch tube Q is a MOSFET, the isolation voltage drop is specifically the voltage between the source S and the drain d of the switch tube Q, so that when its gate g receives a driving control signal, the source S and the drain d of the switch tube Q can be triggered to be turned on or off; and the third voltage compensation circuit 500 can also be understood as follows Figure 5 Any of the second voltage compensation circuits 400 shown will not be described in detail here.

[0084] In order to avoid a drop in the voltage output signal Vout and the current output signal Iout during the short-circuit detection phase t3, thereby preventing a power supply imbalance, during the short-circuit detection phase t3 and its corresponding delay compensation phase t4, the second signal processing sub-circuit 501 is specifically configured to obtain the voltage given signal Vout-F on the second terminal of the switch tube Q in the switch sub-circuit 101 and the voltage output signal Vout from the power supply output signal on its third terminal, so as to use a differential operational amplifier to detect the isolation voltage drop Vsd voltage for sampling the second signal processing sub-circuit 501.

[0085] The second end and the third end of the switch tube Q are the source and the drain respectively.

[0086] S242: Perform differential amplification on the voltage setting signal and the power supply output signal to obtain an isolation voltage drop.

[0087] It is understandable that the second signal processing sub-circuit 501 can use a differential operational amplifier to detect the isolation voltage drop Vsd, that is, the voltage given signal Vout-F and the voltage output signal Vout in the power supply output signal are differentially amplified by the differential operational amplifier sub-circuit 505 to obtain the isolation voltage drop Vsd.

[0088] The second signal processing sub-circuit 501 outputs a driving control signal Drv to the second driving sub-circuit 502 of the switch tube Q, and the second driving sub-circuit 502 implements a switching process for the switch tube Q.

[0089] Among them, the isolation voltage drop Vsd in the switch tube Q sampled by the second signal processing sub-circuit 501 will be superimposed on the voltage loop output, that is, the reference voltage signal Vout-Ref, to compensate it, and after adjustment by the control sub-circuit 503 and the switching power conversion sub-circuit 504, the compensated voltage given signal Vout-F is obtained.

[0090] Correspondingly, the isolation voltage drop Vsd can also be sampled by separately sampling the voltage setting signal Vout-F and the voltage output signal Vout and performing a difference calculation.

[0091] See also Figure 10 , Figure 10 yes Figure 3 In one embodiment, the voltage compensation method of the present application includes, in addition to the above steps S21-S25, further including some more specific steps. Specifically, the above step S25 may include the following steps:

[0092] S2511: In the first switch delay phase corresponding to the drive control signal being adjusted from the second level to the first level, the first setting function is used to adjust and increase the reference voltage signal, so as to obtain a compensated voltage given signal using the adjusted and increased reference voltage signal.

[0093] Specifically, if Figure 8As shown, the third voltage compensation circuit 500 corresponds to the short-circuit detection stage t3. In the first switch delay stage t1 corresponding to the adjustment of the drive control signal Drv from the second level to the first level, in order to compensate for the downward trend of the power supply output signal caused by turning off the drive of the power isolation circuit 100, any reasonable first setting function such as a linear increase function, a curve increase function or an arithmetic increase function can be used to gradually adjust and increase the reference voltage signal Vout-Ref, so as to obtain the compensated voltage given signal Vout-F by using the gradually adjusted increased reference voltage signal Vout-Ref.

[0094] It is worth noting that the second level can be understood as the level state corresponding to the first level, which triggers the power isolation circuit 100 to turn on, that is, to turn on the drive of the power isolation circuit 100, and can specifically be a low level or a high level, which is not limited in this application.

[0095] S2512: In a second switch delay phase corresponding to the drive control signal being adjusted from the first level to the second level, a second setting function is used to adjust and reduce the reference voltage signal, so as to obtain a compensated voltage given signal using the adjusted and reduced reference voltage signal.

[0096] Similarly, the third voltage compensation circuit 500 corresponds to the delay compensation stage t4. During the second switch delay stage t2 corresponding to adjusting the drive control signal Drv from the first level to the second level, any reasonable second setting function such as a linear reduction function, a curve reduction function, or an arithmetic difference reduction function can be specifically adopted to gradually adjust and reduce the reference voltage signal Vout-Ref, so as to obtain the compensated voltage given signal Vout-F using the gradually adjusted and reduced reference voltage signal Vout-Ref.

[0097] It can be understood that after compensating the voltage given signal Vout-F in the short-circuit detection stage t3 and the delay compensation stage t4, that is, the voltage compensation stage t5, the power supply output signal obtained using the compensated voltage given signal Vout-F, that is, the voltage output signal Vout and the current output signal Iout in the power supply output signal will be within the appropriate set threshold range to ensure power supply balance and stability, thereby maintaining the normal operation of the load equipment.

[0098] In some embodiments, the duration of the second switch delay phase t2 is shorter than the duration of the delay compensation phase t4 to ensure that the compensation for the voltage setting signal Vout-F is sufficient to effectively maintain the stability of the power supply output signal.

[0099] Specifically, in one embodiment, the above-mentioned S2511 may further include: when the driving control signal Drv is adjusted from the second level to the first level, charging and discharging the power isolation circuit 100 is adjusted, such as using a constant current source circuit to charge and discharge the gate of the switch tube Q in the power isolation circuit 100, so as to extend the switching process of the power isolation circuit 100 to obtain the first switching delay stage t1.

[0100] Specifically, in one embodiment, the above-mentioned S2512 may further include: when the driving control signal Drv is adjusted from the first level to the second level, charging and discharging the power isolation circuit 100 is adjusted, such as using a constant current source circuit to charge and discharge the gate of the switch tube Q in the power isolation circuit 100, so as to extend the switching process of the power isolation circuit 100 to obtain a second switching delay stage t2.

[0101] See also Figure 11 , Figure 11 yes Figure 3 Flowchart of another embodiment of S25 in FIG. In one embodiment, the voltage compensation method of the present application includes, in addition to the above S21-S25, further including some more specific steps. Specifically, the above S25 may further include the following steps:

[0102] S2521: In response to the driving control signal being adjusted from the second level to the first level, the reference voltage signal is compensated by increasing the first voltage value at each set interval until the cumulative compensated increase value is equal to the steady-state value of the isolation voltage drop, so as to obtain a compensated voltage given signal using the compensated increased reference voltage signal.

[0103] It is understandable that if Figure 8 As shown, the third voltage compensation circuit 500 corresponds to the short-circuit detection stage t3. In response to the drive control signal Drv being adjusted from the second level to the first level, in order to compensate for the downward trend of the power supply output signal caused by turning off the drive of the power isolation circuit 100, the reference voltage signal Vout-Ref can be compensated by increasing the first voltage value at each set time interval until the cumulative compensation increase value is equal to the steady-state value of the isolation voltage drop Vsd, so as to use the compensated reference voltage signal Vout-Ref to obtain the compensated voltage given signal Vout-F.

[0104] It is worth noting that the steady-state value of the isolation voltage drop Vsd can be understood as the voltage value after the isolation voltage drop Vsd stabilizes after the drive of the power isolation circuit 100 is disconnected, that is, the voltage across the diode connected in parallel with the switch tube Q after the switch tube Q is turned off, which is also the voltage across the source and drain of the switch tube Q.

[0105] The set duration may specifically be a cycle time corresponding to the program operating frequency of the third voltage compensation circuit 500. The first voltage value may be calculated based on the steady-state value of the isolation voltage drop Vsd, the duration of the first switching delay phase t1 corresponding to the adjustment of the drive control signal Drv from the second level to the first level, and the program operating frequency.

[0106] For example, if the duration of the first switch delay phase t1 is 2ms, the isolation voltage drop Vsd in the steady state after the switch Q drive is disconnected is 700mV, and the program operating frequency is 100Khz, then the first voltage value is 3.5mV, and the compensation ends after the compensation amount reaches 700mV.

[0107] Among them, compensating the reference voltage signal Vout-Ref by increasing the first voltage value at each set interval can also be understood as compensating the reference voltage signal Vout-Ref by increasing the first voltage value once in each program running cycle until the cumulative compensation increase value is equal to the steady-state value of the isolation voltage drop Vsd and is maintained.

[0108] S2522: In response to the driving control signal being adjusted from the first level to the second level, the reference voltage signal is compensated and reduced by a second voltage value at every set time interval until the accumulated compensated reduction value is equal to the steady-state value, so as to obtain a compensated voltage given signal using the compensated and reduced reference voltage signal.

[0109] Similarly, the third voltage compensation circuit 500 corresponds to the delay compensation stage t4. In response to the drive control signal Drv being adjusted from the first level to the second level, the reference voltage signal Vout-Ref is compensated by reducing the second voltage value at each set time interval until the cumulative compensated reduction value equals the steady-state value of the isolation voltage drop Vsd, thereby using the compensated increased reference voltage signal Vout-Ref to obtain the compensated voltage given signal Vout-F.

[0110] The second voltage value can be calculated based on the steady-state value of the isolation voltage drop Vsd, the duration of the second switch delay phase t2 corresponding to the adjustment of the driving control signal Drv from the first level to the second level, and the program running frequency.

[0111] For example, if the duration of the second switch delay phase t2 is 1ms, the isolation voltage drop Vsd in the steady state after the switch Q drive is disconnected is 700mV, and the program operating frequency is 100Khz, then the second voltage value is 7mV, and the compensation ends after the compensation amount decreases from 700mV to 0.

[0112] The compensation of reducing the reference voltage signal Vout-Ref by the second voltage value at each set time interval can also be understood as compensating the reference voltage signal Vout-Ref by reducing the second voltage value once in each program running cycle until the compensation amount is reduced from 700mV to 0.

[0113] See also Figure 12 , Figure 12 This is a flow chart of the third embodiment of the voltage compensation method of the present application. The voltage compensation method of this embodiment is Figure 1 A flow chart of a detailed implementation of the voltage compensation method in FIG. 1 specifically includes the following steps:

[0114] S31: The voltage compensation circuit sends the voltage setting signal and the drive control signal to the power isolation circuit, so that the power isolation circuit uses the voltage setting signal under the action of the drive control signal to obtain the power output signal and sends it to the power output circuit.

[0115] Among them, S31 and Figure 1 For details, please refer to S11 and its related text descriptions, which will not be repeated here.

[0116] S32: Detect whether the driving control signal is at the first level.

[0117] It is understandable that the power isolation circuit 100 will turn off the drive in the short circuit detection stage, so that by detecting whether the drive control signal is at the first level, it can be determined whether the power isolation circuit 100 is currently in the short circuit detection stage, and then determine whether voltage compensation is performed.

[0118] If the driving control signal is not at the first level, step S33 is executed; if the driving control signal is at the first level, step S34 is executed.

[0119] S33: After a delay of a preset time, the voltage compensation flag is cleared.

[0120] Specifically, when the first voltage compensation circuit 300 determines that the driving control signal is not at the first level, that is, the short-circuit detection phase has ended, in order to ensure that the compensation of the voltage given signal is sufficient to effectively maintain the stability of the power supply output signal, the voltage compensation flag needs to be cleared after a preset delay.

[0121] Among them, the preset duration corresponds to the delay compensation stage, and the voltage compensation flag can be understood as the flag of the first voltage compensation circuit 300 executing the voltage compensation control program, so that when the voltage compensation flag is set, the power isolation circuit 100 is voltage compensated, and after the voltage compensation flag is cleared, the voltage compensation of the power isolation circuit 100 is ended.

[0122] S34: Set the voltage compensation flag.

[0123] It is understandable that when the driving control signal is at the first level, it indicates that the power isolation circuit 100 is in the short circuit detection stage, and the voltage compensation flag needs to be set.

[0124] S35: performing short circuit detection on the power isolation circuit in a short circuit detection phase when the driving control signal is at the first level.

[0125] S36: Obtaining the isolation voltage drop in the power isolation circuit during the short circuit detection phase and its corresponding delay compensation phase.

[0126] Among them, S35 and S36 are respectively Figure 1 S12 and S13 are the same. For details, please refer to S12 and S13 and their related text descriptions, which will not be repeated here.

[0127] S37: Check whether the voltage compensation flag is valid.

[0128] Specifically, in order to determine whether voltage compensation is currently required, the first voltage compensation circuit 300 may detect whether the voltage compensation flag is valid.

[0129] If the voltage compensation flag is valid, execute S38; if the voltage compensation flag is invalid, return to execute S32.

[0130] S38: Using the isolation voltage drop to compensate for the voltage given signal, so that the power isolation circuit uses the compensated voltage given signal to maintain the power supply output signal within a set threshold range.

[0131] Among them, S38 and Figure 1 For details, please refer to S14 and its related text descriptions, which will not be repeated here.

[0132] See also Figure 13 , Figure 13 This is a flow chart of the fourth embodiment of the voltage compensation method of the present application. The voltage compensation method of this embodiment is Figure 1 A flow chart of a detailed implementation of the voltage compensation method in FIG. 1 specifically includes the following steps:

[0133] S41: The voltage compensation circuit sends the voltage setting signal and the drive control signal to the power isolation circuit, so that the power isolation circuit uses the voltage setting signal under the action of the drive control signal to obtain the power output signal and sends it to the power output circuit.

[0134] Among them, S41 and Figure 1 For details, please refer to S11 and its related text descriptions, which will not be repeated here.

[0135] S42: In the short circuit detection phase when the driving control signal is at the first level, detecting whether the isolation voltage drop is lower than a preset voltage threshold.

[0136] Specifically, when the first voltage compensation circuit 300 performs short-circuit detection on the power isolation circuit 100, the drive control signal sent to the power isolation circuit 100 is adjusted to the first level to enter the short-circuit detection stage, and the isolation voltage drop in the power isolation circuit 100 is subjected to voltage detection to determine whether the isolation voltage drop is lower than a preset voltage threshold.

[0137] It is worth noting that the preset voltage threshold can be understood as when a short circuit fault occurs in the power isolation circuit 100. For example, when a short circuit occurs in the switch tube in the power isolation circuit 100, the voltage across the source and drain of the switch tube will be lower than the conduction voltage drop of the diode connected in parallel with it when it is not in a short circuit fault. It is any reasonable voltage threshold set to distinguish whether the switch tube is short-circuited; the preset voltage threshold can specifically be any reasonable voltage threshold such as 0.2V (volts), 0.3V, etc., and is preferably 0.2V, and this application does not limit this.

[0138] If the isolation voltage drop is lower than the preset voltage threshold, S43 is executed; if the isolation voltage drop is not lower than the preset voltage threshold, the process returns to S44.

[0139] S43: Adjust the voltage given signal to 0.

[0140] Specifically, when it is determined that the isolation voltage drop is lower than the preset voltage threshold, that is, a short circuit fault occurs in the power isolation circuit 100, in order to avoid adverse effects on the power supply of the power load, the power supply output of the power isolation circuit 100 with the short circuit fault needs to be disconnected, that is, the voltage given signal is adjusted to 0.

[0141] Furthermore, in order to restore the power supply of the power isolation circuit 100 that has a short-circuit fault as soon as possible, the first voltage compensation circuit 300 can also specifically issue a short-circuit fault alarm, or issue a short-circuit fault instruction to the background intelligent terminal connected to it, so that the background intelligent terminal pops up an alarm message to remind the user that a fault point has occurred and needs to be dealt with in a timely manner.

[0142] S44: Obtaining an isolation voltage drop in the power isolation circuit during the short circuit detection phase and its corresponding delay compensation phase.

[0143] S45: Using the isolation voltage drop to compensate for the voltage given signal, so that the power isolation circuit uses the compensated voltage given signal to maintain the power output signal within a set threshold range.

[0144] Among them, S44 and S45 are respectively Figure 1 S13 and S14 are the same. For details, please refer to S13 and S14 and their related text descriptions, which will not be repeated here.

[0145] This application also provides an electronic device, see Figure 14 , Figure 14FIG. 5 is a schematic diagram of the structure of an embodiment of an electronic device of the present application. In this embodiment, the electronic device 50 includes a housing 51 and a fourth voltage compensation circuit 52 connected to the housing 51 .

[0146] It should be noted that the fourth voltage compensation circuit 52 described in this embodiment is the first voltage compensation circuit 300, the second voltage compensation circuit 400 or the third voltage compensation circuit 500 described in any one of the above embodiments. Figures 1-13 And the related text content will not be repeated here.

[0147] The beneficial effects of the present application are: different from the existing technology, the voltage compensation method provided by the present application sends the voltage given signal and the drive control signal to the power supply isolation circuit through the voltage compensation circuit, so that the power supply isolation circuit uses the voltage given signal to obtain the power supply output signal under the action of the drive control signal, and sends it to the power supply output circuit, so as to perform short-circuit detection on the power supply isolation circuit in the short-circuit detection stage when the drive control signal is at the first level, and obtain the isolation voltage drop in the power supply isolation circuit in the short-circuit detection stage and its corresponding delay compensation stage, and use the isolation voltage drop to compensate the voltage given signal, so that the power supply isolation circuit uses the compensated voltage given signal to maintain the power supply output signal within the set threshold range. Therefore, in the short-circuit detection of the power isolation circuit, the isolation voltage drop in the power isolation circuit can be used to compensate the voltage given signal, effectively reducing the output voltage drop during the short-circuit detection process of the power isolation circuit, so as to ensure that in the redundant mode where multiple power isolation circuits jointly supply power to the power output circuit, the detected power isolation circuit can still share current with other power isolation circuits in the system to ensure power supply balance and stability, thereby maintaining the normal operation of the load equipment; and compensating the voltage given signal by sampling the isolation voltage drop in the power isolation circuit is a closed-loop control solution with good adaptability, which can effectively avoid the mismatch problem caused by the differences of each power isolation circuit.

[0148] The above description is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A voltage compensation method, applied to voltage compensation in short-circuit detection of a power isolation circuit, wherein the power isolation circuit is used to couple with a voltage compensation circuit and a power output circuit, and the power isolation circuit includes a switch tube and a parallel diode, characterized in that: The voltage compensation method comprises: The voltage compensation circuit sends a voltage setting signal and a drive control signal to the power isolation circuit, so that the power isolation circuit uses the voltage setting signal under the action of the drive control signal to obtain a power output signal and sends the signal to the power output circuit; Performing short-circuit detection on the power isolation circuit during a short-circuit detection phase when the drive control signal is at a first level; Obtaining the isolation voltage drop in the power isolation circuit during the short circuit detection phase and its corresponding delay compensation phase; The isolation voltage drop is used to compensate the given voltage signal, so that the power isolation circuit uses the compensated given voltage signal to maintain the power output signal within a set threshold range.

2. The voltage compensation method according to claim 1, wherein: Before the step of the voltage compensation circuit sending the voltage setting signal and the drive control signal to the power isolation circuit, so that the power isolation circuit uses the voltage setting signal to obtain the power output signal under the action of the drive control signal and sends the power output signal to the power output circuit, the step further includes: Obtaining the voltage given signal using a reference voltage signal; The compensating the voltage given signal by using the isolation voltage drop includes: The isolation voltage drop is added to the reference voltage signal to compensate for the voltage setting signal.

3. The voltage compensation method according to claim 2, wherein: The step of superimposing the isolation voltage drop on the reference voltage signal to compensate for the voltage setting signal includes: During a first switch delay phase corresponding to when the drive control signal is adjusted from the second level to the first level, the reference voltage signal is adjusted and increased using a first setting function, so as to obtain the compensated voltage setting signal using the adjusted and increased reference voltage signal; In a second switching delay stage corresponding to the adjustment of the drive control signal from the first level to the second level, a second setting function is used to adjust and reduce the reference voltage signal, so as to obtain the compensated voltage given signal using the adjusted and reduced reference voltage signal; wherein the duration of the second switching delay stage is less than the duration of the delay compensation stage.

4. The voltage compensation method according to claim 3, wherein: The first switch delay phase corresponding to the adjustment of the driving control signal from the second level to the first level includes: When the driving control signal is adjusted from the second level to the first level, charging and discharging the power isolation circuit are regulated to extend the switching process of the power isolation circuit to obtain the first switching delay stage; The second switch delay phase corresponding to the drive control signal adjusting from the first level to the second level includes: When the driving control signal is adjusted from the first level to the second level, the power isolation circuit is charged and discharged to extend the switching process of the power isolation circuit to obtain the second switching delay stage.

5. The voltage compensation method according to claim 2, characterized in that: The step of superimposing the isolation voltage drop on the reference voltage signal to compensate for the voltage setting signal includes: In response to the drive control signal being adjusted from the second level to the first level, compensating the reference voltage signal by increasing a first voltage value at intervals of a set time until the accumulated compensated increase value is equal to the steady-state value of the isolation voltage drop, thereby obtaining the compensated voltage given signal using the compensated reference voltage signal; In response to the drive control signal being adjusted from the first level to the second level, the reference voltage signal is compensated and reduced by a second voltage value at every set time interval until the accumulated compensated reduction value is equal to the steady-state value, so as to obtain the compensated voltage given signal using the compensated and reduced reference voltage signal.

6. The voltage compensation method according to claim 2, characterized in that: The power isolation circuit includes a switch subcircuit, which is used to couple with the voltage compensation circuit and the power output circuit. The obtaining of the isolation voltage drop in the power isolation circuit during the short circuit detection phase and the corresponding delay compensation phase includes: During the short-circuit detection phase and the corresponding delay compensation phase, the voltage setting signal on the second terminal of the switch sub-circuit and the power supply output signal on the third terminal thereof are obtained; wherein, when the drive control signal received at the first terminal of the switch sub-circuit is at the second level, the second terminal and the third terminal of the switch sub-circuit are triggered to be turned on; The voltage setting signal and the power supply output signal are differentially amplified to obtain the isolation voltage drop.

7. The voltage compensation method according to any one of claims 1 to 6, characterized in that: Obtaining the isolation voltage drop in the power isolation circuit during the short circuit detection phase and the corresponding delay compensation phase includes: detecting whether the driving control signal is at the first level; If the driving control signal is at the first level, setting a voltage compensation flag; If the driving control signal is not at the first level, the voltage compensation flag is cleared after a preset delay time; wherein the preset delay time is equal to the duration of the delay compensation phase; The compensating the voltage given signal by using the isolation voltage drop includes: Detecting whether the voltage compensation flag is valid; If the voltage compensation flag is valid, the voltage setting signal is compensated using the isolation voltage drop.

8. The voltage compensation method according to any one of claims 1 to 6, characterized in that: The performing short circuit detection on the power isolation circuit during the short circuit detection phase in which the drive control signal is at the first level includes: In the short-circuit detection phase when the drive control signal is at the first level, detecting whether the isolation voltage drop is lower than a preset voltage threshold; If the isolation voltage drop is lower than a preset voltage threshold, the voltage setting signal is adjusted to 0.

9. A voltage compensation circuit, characterized in that: The voltage compensation circuit is used to couple with the power isolation circuit, and the power isolation circuit is used to couple with the power output circuit; The voltage compensation circuit is configured to implement voltage compensation control on the power isolation circuit using the voltage compensation method according to any one of claims 1 to 8.

10. An electronic device, characterized in that: The electronic device includes a housing and a voltage compensation circuit connected to the housing; Wherein, the voltage compensation circuit is the voltage compensation circuit as claimed in claim 9.

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