Voltage compensation method, voltage compensation circuit and electronic equipment

Abstract

The invention discloses a voltage compensation method, a voltage compensation circuit and electronic equipment, and the method comprises the steps: enabling the voltage compensation circuit to transmit a voltage given signal and a drive control signal to a power isolation circuit, so as to enable the power isolation circuit to obtain a power supply output signal through the voltage given signal under the action of the drive control signal, the power supply is transmitted to the power supply output circuit; performing short-circuit detection on the power supply isolation circuit in a short-circuit detection stage when the driving control signal is the first level; isolation voltage drop in the power supply isolation circuit is obtained in the short circuit detection stage and the corresponding delay compensation stage; and compensating the voltage given signal by using the isolation voltage drop, so that the power supply isolation circuit maintains the power supply output signal within a set threshold range by using the compensated voltage given signal. According to the mode, the voltage compensation method can effectively reduce the output voltage drop in the short circuit detection process of the power supply isolation circuit, ensures the power supply stability, and has good adaptability.

Description

Technical Field

[0001] This application relates to the field of circuit control technologies, and particularly to a voltage compensation method, a voltage compensation circuit, and an electronic device. Background Art

[0002] Currently, in the power supply of electronic devices, especially when multiple power supplies supply power to an electronic device in a redundant mode, to prevent a single-point failure from causing a failure of a system with multiple power supplies, isolation circuits need to be configured for the outputs of all power supplies. The isolation circuit usually consists of a switching transistor and a parallel-connected diode, so that when a power supply fails or a hot plug operation is performed, the corresponding power supply can be removed from the system power bus by controlling the switching transistor.

[0003] To monitor the operating status of each power supply, short-circuit detection of the isolation circuit is usually required. For this short-circuit detection, the drive of the switching transistor in the isolation circuit needs to be turned off, and the power supply output current will flow through the parallel-connected diode. However, since the on-voltage drop of the diode is much larger than the voltage drop after the switching transistor is fully turned on, the on-voltage drop of the diode will immediately appear on the power supply output voltage, which will cause the detected power supply output current to quickly drop to zero, so that the detected power supply is almost in an unloaded state during almost the entire short-circuit detection process, resulting in a drop in the power supply output voltage, inability to share current with other power supplies in the system, and thus unstable power supply and affecting the normal operation of the load device. Summary of the Invention

[0004] The main technical problem to be solved by this application is to provide a voltage compensation method, a voltage compensation circuit, and an electronic device, which can solve the problem in the related art that during the short-circuit detection of the power supply isolation circuit, there is a drop in the power supply output voltage, inability to share current with other power supplies in the system, resulting in unstable power supply and affecting the normal operation of the load device.

[0005] To solve the above technical problem, a technical solution adopted by this application is: to provide a voltage compensation method, which is applied to voltage compensation during the short-circuit detection of a power supply isolation circuit. The power supply isolation circuit includes a power supply isolation circuit, and the power supply isolation circuit is used to be coupled to a voltage compensation circuit and a power supply output circuit. Among them, the voltage compensation method includes: the voltage compensation circuit sends a voltage reference signal and a drive control signal to the power supply isolation circuit, so that the power supply isolation circuit obtains a power supply output signal by using the voltage reference signal under the action of the drive control signal and sends it to the power supply output circuit; performing short-circuit detection on the power supply isolation circuit during the short-circuit detection stage when the drive control signal is at a first level; obtaining the isolation voltage drop in the power supply isolation circuit during the short-circuit detection stage and its corresponding delay compensation stage; compensating the voltage reference signal by using the isolation voltage drop, so that the power supply isolation circuit maintains the power supply output signal within a set threshold range by using the compensated voltage reference signal.

[0006] Wherein, before the voltage compensation circuit sends the voltage reference signal and the drive control signal to the power isolation circuit, so that the power isolation circuit obtains a power supply output signal by using the voltage reference signal under the action of the drive control signal and sends it to the power supply output circuit, it further includes: obtaining the voltage reference signal by using a reference voltage signal; compensating the voltage reference signal by using the isolation voltage drop includes: superimposing the isolation voltage drop on the reference voltage signal to compensate the voltage reference signal.

[0007] Wherein, superimposing the isolation voltage drop on the reference voltage signal to compensate the voltage reference signal includes: in the first switching delay stage corresponding to the drive control signal being adjusted from the second level to the first level, adjusting and increasing the reference voltage signal by using a first setting function, so as to obtain a compensated voltage reference signal by using the adjusted and increased reference voltage signal; in the second switching delay stage corresponding to the drive control signal being adjusted from the first level to the second level, adjusting and decreasing the reference voltage signal by using a second setting function, so as to obtain a compensated voltage reference signal by using the adjusted and decreased reference voltage signal; wherein, the duration of the second switching delay stage is less than the duration of the delay compensation stage.

[0008] Wherein, the first switching delay stage corresponding to the drive control signal being adjusted from the second level to the first level includes: when the drive control signal is adjusted from the second level to the first level, performing charge and discharge adjustment on the power isolation circuit 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 drive control signal being adjusted from the first level to the second level includes: when the drive control signal is adjusted from the first level to the second level, performing charge and discharge adjustment on the power isolation circuit to extend the switching process of the power isolation circuit to obtain the second switching delay stage.

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

[0010] Among them, the power isolation circuit includes a switching sub-circuit. The switching sub-circuit is used to be coupled to 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 its third end during the short-circuit detection stage and its corresponding delay compensation stage; among them, when the drive control signal received by the first end of the switching sub-circuit is at the second level, the second end and the third end of the switching sub-circuit are triggered to conduct; 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 during the short-circuit detection stage and its corresponding delay compensation stage includes: detecting whether the drive control signal is at the first level; if the drive control signal is at the first level, setting the voltage compensation flag; if the drive control signal is not at the first level, clearing the voltage compensation flag after delaying for a preset duration; among them, the preset duration is equal to the duration of the delay compensation stage; 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, compensating the voltage given signal by using the isolation voltage drop.

[0012] Among them, performing short-circuit detection on the power isolation circuit during the short-circuit detection stage when the drive control signal is at the first level includes: during 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] To solve the above technical problems, another technical solution adopted by this application is: providing a voltage compensation circuit. Among them, the voltage compensation circuit is used to be coupled to the power isolation circuit, and the power isolation circuit is used to be coupled to the power supply output circuit; among them, the voltage compensation circuit is used to implement voltage compensation control on the power isolation circuit by using the voltage compensation method described in any one of the above.

[0014] To solve the above technical problems, another technical solution adopted by this application is: providing an electronic device. Among them, the electronic device includes a housing and a voltage compensation circuit connected to the housing; among them, the voltage compensation circuit is the voltage compensation circuit described above.

[0015] The beneficial effects of the present application are as follows: Different from the prior art, the voltage compensation method provided by the present application sends a voltage given signal and a drive control signal to a power isolation circuit through a voltage compensation circuit, so that the power isolation circuit obtains a power supply output signal by using the voltage given signal under the action of the drive control signal and sends it to a power supply output circuit, to perform short-circuit detection on the power isolation circuit during the short-circuit detection stage when the drive control signal is at a first level, and obtain the isolation voltage drop in the power isolation circuit during the short-circuit detection stage and its corresponding delay compensation stage, and compensate the voltage given signal by using the isolation voltage drop, so that the power isolation circuit maintains the power supply output signal within a set threshold range by using the compensated voltage given signal, thereby being able to compensate the voltage given signal by using the isolation voltage drop in the power isolation circuit during the short-circuit detection of the power isolation circuit, effectively reducing the output voltage drop during the short-circuit detection process of the power isolation circuit, to ensure that in a redundant mode where multiple power isolation circuits jointly supply power to the power supply output circuit, the power isolation circuit to be detected can still share current with other power isolation circuits in the system, to ensure power supply balance and stability, and further maintain the normal operation of the load device; and compensating the voltage given signal by sampling the isolation voltage drop in the power isolation circuit is a closed-loop control scheme, which has good adaptability and 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 will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings, where: Figure 1 is a schematic flowchart of the first implementation manner of the voltage compensation method of the present application; Figure 2 is a schematic structural diagram of the first implementation manner of the voltage compensation circuit of the present application; Figure 3 is a schematic flowchart of the second implementation manner of the voltage compensation method of the present application; Figure 4 is Figure 3 a schematic flowchart of an embodiment of S24 in Figure 5 is a schematic structural diagram of the second implementation manner of the voltage compensation circuit of the present application; Figure 6 is Figure 5 a waveform schematic diagram of short-circuit detection of the power isolation circuit in the redundant mode in Figure 7 is a waveform schematic diagram of the characteristic curve of the non-saturation region of the switching tube; Figure 8 It is a waveform schematic diagram for short-circuit detection when the power isolation circuit of the present application is in the redundant mode after compensation by the voltage compensation circuit; Figure 9 It is a schematic structural diagram of the third embodiment of the voltage compensation circuit of the present application; Figure 10 It is Figure 3 A schematic flowchart of an embodiment of S25 in Figure 11 It is Figure 3 A schematic flowchart of another embodiment of S25 in Figure 12 It is a schematic flowchart of the third embodiment of the voltage compensation method of the present application; Figure 13 It is a schematic flowchart of the fourth embodiment of the voltage compensation method of the present application; Figure 14 It is a schematic structural diagram of an embodiment of the electronic device of the present application. Specific Embodiments

[0017] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0018] The terms "first", "second", and "third" in the present application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", and "third" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products, or devices.

[0019] References herein to "embodiments" mean that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0020] The present application will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] Please refer to Figure 1 and Figure 2 , where Figure 1 is a schematic flowchart of the first embodiment of the voltage compensation method of the present application, Figure 2 and is a schematic structural diagram of the first embodiment of the voltage compensation circuit of the present application. Specifically, the following steps may be included:

[0022] It can be understood that the voltage compensation method in this embodiment is specifically applied to Figure 2 as shown in the first voltage compensation circuit 300 to perform voltage compensation on the power supply output signal during the short-circuit detection of the power isolation circuit 100. The power isolation circuit 100 is used to be coupled 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 by using the voltage compensation method described in any item herein.

[0023] 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 supply power to load devices such as servers, storage devices, network devices, or switches through the power supply output circuit 200; or, receive the power supply output signal after power conversion and regulation of any reasonable superior 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 supply output signal and supply power to the load device through the power supply output circuit 200. This embodiment does not limit this.

[0024] Among them, the number of the power isolation circuits 100 may specifically be one or more. When the number of the power isolation circuits 100 is multiple, the first voltage compensation circuit 300 may specifically be one or more to perform voltage compensation on the power isolation circuits 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 sends a corresponding power supply output signal to the power supply output circuit 200 by using the compensated voltage given signal. After current sharing by the power supply output circuit 200, power is supplied to the load device. This embodiment does not limit this.

[0025] In addition, "coupled" in this article refers to including any direct and indirect connection means. Therefore, if it is described in the text that the first circuit is coupled to the second circuit, it means that the first circuit can be directly connected to the second circuit through electrical connection, wireless transmission, optical transmission and other signal connection methods, or indirectly electrically connected or signal - connected to the second circuit through other circuits or connection means.

[0026] In some embodiments, the first voltage compensation circuit 300 may specifically include one of any reasonable circuit units with signal - processing functions, such as 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, discrete gates or transistor logic devices, discrete hardware, etc., to implement the drive control of the power isolation circuit 100 and voltage compensation during its short - circuit detection process. This application does not limit this.

[0027] Specifically, the first voltage compensation circuit 300 uses its internal power supply or receives a power supply output signal provided by an external power supply to send a voltage given signal to the power isolation circuit 100 correspondingly, and generates a drive control signal according to the current preset control program or the detected operating state 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 supply output signal and send it to the power supply output circuit 200.

[0028] It should be noted that the power supply output circuit 200 can specifically be a functional circuit in the electrical load device, or a backend functional circuit that uses the power supply output signal to achieve any reasonable other signal functions such as power regulation, energy storage, and current sharing. When the number of power isolation circuits 100 is multiple, the power supply output circuit 200 can specifically be a power supply bus to supply power to the electrical load device after equalizing the power supply output signals of the power isolation circuits 100. The present application does not limit this.

[0029] S12: Perform a short - circuit detection on the power isolation circuit during the short - circuit detection stage when the drive control signal is at the first level.

[0030] It can be understood 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 at the non - control end of the switch tube to determine whether the power isolation circuit 100 has a short - circuit fault.

[0031] Among them, taking the case where the drive control signal at the first level triggers the power isolation circuit 100 to turn off as an example, when the first voltage compensation circuit 300 adjusts the drive control signal sent to the power isolation circuit 100 to the first level, the short - circuit detection of the power isolation circuit 100 can be performed, such as detecting whether there is an abnormally low - impedance path (i.e., short - circuit) in the power isolation circuit 100 to avoid damaging the entire system. The time interval during which the drive control signal corresponds to the first level and the short - circuit detection of the power isolation circuit 100 is performed is the short - circuit detection stage.

[0032] In some embodiments, the first level can specifically be a high level or a low level, and it is specifically the level state that triggers the power isolation circuit 100 to turn off. The present application does not limit this.

[0033] S13: Obtain the isolation voltage drop in the power isolation circuit during the short - circuit detection stage and its corresponding delay compensation stage.

[0034] Specifically, the first voltage compensation circuit 300 collects the isolation voltage drop in the power isolation circuit 100 during the short - circuit detection stage and the subsequent delay compensation stage.

[0035] Among them, the delay compensation stage can be understood as an interval with a specific duration starting from the end moment of the short - circuit detection stage, which is set to ensure that enough time is given for the system to recover from the detection state to the normal working state after the short - circuit detection.

[0036] The isolation voltage drop can be understood as the voltage between two non-control terminals of the power isolation circuit 100 triggered to conduct or turn off under the action of the drive control signal, which is used to feedback the voltage change during the switching operation and determine the open state, short-circuit state, and normal conduction and off states inside the power isolation circuit 100.

[0037] S14: Compensate the voltage given signal with the isolation voltage drop so that the power isolation circuit maintains the power supply output signal within the set threshold range by using the compensated voltage given signal.

[0038] It can be understood that during the short-circuit detection stage of the power isolation circuit 100, since the power isolation circuit 100 is triggered to turn off, or the first voltage compensation circuit 300 turns off the drive for the power isolation circuit 100, the corresponding voltage given signal will decay and drop 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 drop rapidly, and the power isolation circuit 100 to be detected will be in a state of reduced load or even no load throughout the short-circuit detection stage. To avoid the power supply output signal from dropping, it is necessary to increase the voltage given signal or perform a certain amount of voltage compensation on the voltage given signal.

[0039] Specifically, the first voltage compensation circuit 300 compensates the voltage given signal during the short-circuit detection stage and the delay compensation stage by using the sampled isolation voltage drop 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 by using the compensated voltage given signal can still be maintained within the set threshold range during the short-circuit detection stage and the delay compensation stage.

[0040] It is worth noting that the set threshold range can be specifically understood as the voltage threshold range of the voltage output signal in the power supply output signal output to the power supply output circuit 200 and the current threshold range of the current output signal when the power isolation circuit 100 normally supplies power to the power supply output circuit 200 or maintains the power supply current sharing, so as to ensure the power supply balance and stability and then maintain the normal operation of the load device.

[0041] In the above solution, during the short - circuit detection of the power isolation circuit 100, the isolation voltage drop in the power isolation circuit 100 is used to compensate the voltage reference signal, effectively reducing the output voltage drop during the short - circuit detection of the power isolation circuit 100. To ensure that in the redundant mode where multiple power isolation circuits 100 jointly supply power to the power supply output circuit 200, the detected power isolation circuit 100 can still share current evenly with other power isolation circuits 100 in the system, ensuring power supply balance and stability, and thus maintaining the normal operation of the load device. And compensating the voltage reference signal by sampling the isolation voltage drop in the power isolation circuit 100 is a closed - loop control scheme, which has good adaptability and can effectively avoid the mismatch problem caused by the differences of each power isolation circuit 100.

[0042] Please refer to Figure 3 , Figure 3 which is a schematic flowchart of the second implementation mode of the voltage compensation method of the present application. The voltage compensation method of this implementation mode is Figure 1 a schematic flowchart of a refined implementation mode of the voltage compensation method in S21: Obtain a voltage reference signal using a reference voltage signal.

[0043] It can be understood that the first voltage compensation circuit 300 can specifically obtain a reference voltage signal using the power supply circuit inside it that provides a stable level state, or a power supply circuit outside that provides a stable level state, and perform any reasonable adjustment such as operational amplification or power conversion on the reference voltage signal to obtain a voltage reference signal.

[0044] S22: The voltage compensation circuit sends the voltage reference signal and the drive control signal to the power isolation circuit, so that the power isolation circuit uses the voltage reference 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.

[0045] S23: Perform short - circuit detection on the power isolation circuit during the short - circuit detection stage when the drive control signal is at the first level.

[0046] S24: Obtain the isolation voltage drop in the power isolation circuit during the short - circuit detection stage and its corresponding delay compensation stage.

[0047] Among them, S22, S23, and S24 are respectively the same as Figure 1 S11, S12, and S13 in

[0048] Please refer to S11, S12, and S13 and their related written descriptions for details, which will not be elaborated here. Superimpose the isolation voltage drop on the reference voltage signal to compensate the voltage reference signal, so that the power isolation circuit uses the compensated voltage reference signal to maintain the power supply output signal within the set threshold range.

[0049] 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.

[0050] Among them, the isolation voltage drop can be understood as the voltage between two non-control terminals of the power isolation circuit 100 after the drive is turned off. After superimposing the isolation voltage drop on the reference voltage signal to obtain a compensated voltage given signal, it can effectively compensate for the voltage drop caused when the power isolation circuit 100 turns off the drive, so that the power isolation circuit 100 uses the compensated voltage given signal to obtain a power supply output signal, and can effectively maintain within the set threshold range in the short-circuit detection stage and the delay compensation stage.

[0051] Please continue to refer to Figure 4 , Figure 4 is Figure 3 a schematic flowchart of an embodiment of S24 in S241: Obtain the voltage given signal on the second end of the switch sub-circuit and the power supply output signal on its third end in the short-circuit detection stage and its corresponding delay compensation stage.

[0052] Please refer to Figure 5 , Figure 5 which is a schematic structural diagram of the second embodiment of the voltage compensation circuit of the present application.

[0053] In some embodiments, the power isolation circuit 100 further specifically includes a switching sub - circuit 101, which is used to be coupled to the second voltage compensation circuit 400 and the power supply output circuit 200; and the second voltage compensation circuit 400 corresponding to the switching sub - circuit 101 may specifically further include a first signal processing sub - circuit 401 and a first driving sub - circuit 402, and the power supply output circuit 200 may specifically further include a power supply bus 201; the switching sub - circuit 101 is coupled to the first signal processing sub - circuit 401 or is used to be coupled to an external power supply circuit (not shown in the figure) to receive a voltage given signal provided by the first signal processing sub - circuit 401 or the power supply circuit, or the power supply circuit may also be integrated in the power isolation circuit 100 or the second voltage compensation circuit 400 to provide a voltage given signal for the switching sub - circuit 101; the first signal processing sub - circuit 401 is coupled to the first driving sub - circuit 402 and the switching sub - circuit 101, the first driving sub - circuit 402 is coupled to the switching sub - circuit 101, and the switching sub - circuit 101 is also used to be coupled to the power supply bus 201; the first signal processing sub - circuit 401 is used to send a drive control signal to the switching sub - circuit 101 according to a preset control program or based on the isolation voltage drop in the switching sub - circuit 101 obtained, so as to trigger the switching sub - circuit 101 to conduct or turn off by using the drive control signal, adjust the voltage given signal into a power supply output signal, and send it to the power supply bus 201.

[0054] In some embodiments, the switching sub - circuit 101 may specifically be at least two, and each switching sub - circuit 101 may specifically further include a switching tube (not shown in the figure) and a diode (not shown in the figure) connected in parallel with the switching tube; and the switching tube may specifically be one of any reasonable power semiconductor devices 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 the present application does not make any limitation thereto.

[0055] Wherein, 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 a drive control signal is received at its gate g, the source S and the drain d of the switching tube can be triggered to conduct or turn off with each other.

[0056] For the convenience of understanding, taking the switch sub-circuit 101 as an example where there are specifically n (n is an integer greater than 1) switch sub-circuits, each including a switching transistor Q1, a switching transistor Q2, ..., a switching transistor Qn, and a diode D1, a diode D2, ..., a diode Dn, it can be known that each second voltage compensation circuit 400 respectively 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 driving sub-circuit 1, a first driving sub-circuit 2, ..., a first driving sub-circuit n; the first signal processing sub-circuit 1 is used to provide a voltage given signal Vout-F1 to the switching transistor Q1 and send a driving control signal Drv1 to the first driving sub-circuit 1, so that after the first driving sub-circuit 1 adjusts the driving control signal Drv1, it is sent to the switching transistor Q1 to trigger the switching transistor Q1 to conduct or turn off, thereby adjusting the voltage given signal Vout-F1 to a voltage output signal Vout1 and a current output signal Iout1, and sending them to the power supply bus 201; similarly, the first signal processing sub-circuit 2 is used to provide a voltage given signal Vout-F2 to the switching transistor Q2 and send a driving control signal Drv2 to the first driving sub-circuit 2, so that after the first driving sub-circuit 2 adjusts the driving control signal Drv2, it is sent to the switching transistor Q2 to trigger the switching transistor Q2 to conduct or turn off, thereby adjusting the voltage given signal Vout-F2 to a voltage output signal Vout2 and a current output signal Iout2, and sending them to the power supply bus 201; ...; the first signal processing sub-circuit n is used to provide a voltage given signal Vout-Fn to the switching transistor Q2 and send a driving control signal Drvn to the first driving sub-circuit n, so that after the first driving sub-circuit n adjusts the driving control signal Drvn, it is sent to the switching transistor Qn to trigger the switching transistor Qn to conduct or turn off, thereby adjusting the voltage given signal Vout-Fn to a voltage output signal Voutn and a current output signal Ioutn, and sending them to the power supply bus 201; the power supply bus 201 is used to equalize the current output signals Iout1, Iout2, ..., Ioutn and then provide them to the electrical load device.

[0057] Please continue to refer to Figure 6 , Figure 6 is Figure 5 a waveform schematic diagram of the short-circuit detection of the power supply isolation circuit in the redundant mode in

[0058] It can be understood that taking the short-circuit detection of the power supply isolation circuit 100 specifically including the switching transistor Q1 as an example, when performing short-circuit detection on the switching transistor Q1, the driving of the switching transistor Q1 will be turned off, such as adjusting the driving 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 switching transistor Q1. When the detected voltage is lower than a certain threshold below the conduction voltage of the parallel diode, it is determined that the switching transistor Q1 is short-circuited.

[0059] Among them, since the driving of the switching transistor Q1 needs to be turned off, the current of the voltage given signal Vout-F1 will flow through the diode D1 in parallel therewith. Because the conduction voltage drop of the diode D1 is usually much larger than the voltage drop after the switching transistor Q1 is fully turned on, the conduction voltage drop of the diode D1 will immediately occur between the source and drain of the switching transistor Q1. In the redundant mode, this will cause the voltage output signal Vout1 in the detected switching transistor Q1 to decrease, and the current output signal Iout1 will quickly drop to zero. Almost throughout the short-circuit detection process, the detected switching transistor Q1 will be in a state of reduced load or even no load, and it cannot share the current evenly with other power isolation circuits 100 in the system until it exits the short-circuit detection process and can share the current evenly with other power isolation circuits 100 in the system normally. In the actual detection process, since the turn-on time t12 and turn-off time t11 of the switching transistor Q1 are usually about 20 us (microseconds), it is difficult to quickly process this voltage drop. Therefore, it is also necessary to slow down the switching process of the switching transistor Q1 to extend the turn-on time t12 and turn-off time t11 to more than 1 ms (milliseconds).

[0060] Please continue to refer to Figure 7 , Figure 7 which is a waveform schematic diagram of the characteristics curve of the non-saturation region of the switching transistor.

[0061] It can be understood that slowing down the switching process of the switching transistor Q1 can be achieved by using the characteristics of the switching transistor Q1 in the non-saturation region. Slow down the charging and discharging speed of the gate of the switching transistor Q1, so that the gate-source voltage Vgs of the switching transistor rises and falls slowly, thereby making the isolation voltage drop Vsd1 change slowly.

[0062] In some embodiments, slowing down the switching process of the switching transistor Q1 can be achieved in a variety of ways: for example, adding a current-limiting resistor to the gate of the switching transistor Q1, or building a constant current source circuit to charge and discharge the gate, etc., so that the gate-source voltage Vgs of the switching transistor changes slowly.

[0063] It is worth noting that when the power isolation circuit 100 corresponding to the short-circuit detection is the switching transistor Q2 and / or the switching transistor Qn, the same applies, and details are not described herein again.

[0064] Please continue to refer to Figure 8 and Figure 9 , where Figure 8 is a waveform schematic diagram of the short-circuit detection when the power isolation circuit of the present application is in the redundant mode after being compensated by the voltage compensation circuit, Figure 9 is a schematic structural diagram of the third embodiment of the voltage compensation circuit of the present application.

[0065] It is understandable that, in some embodiments, the power isolation circuit 100 further specifically includes a switch sub-circuit 101, which is used to be coupled to a third voltage compensation circuit 500 and a power supply output circuit (not shown in the figure); and the third voltage compensation circuit 500 further specifically includes a second signal processing sub-circuit 501, a second drive sub-circuit 502, a control sub-circuit 503, a switching power supply conversion sub-circuit 504, and a differential operational amplifier sub-circuit 505. The power supply output circuit may specifically further include a power supply bus (not shown in the figure); the switch sub-circuit 101 is coupled to the second drive sub-circuit 502, the switching power supply conversion sub-circuit 504, and the differential operational amplifier sub-circuit 505, and is used to be coupled to the power supply bus; the second signal processing sub-circuit 501 is coupled to the second drive 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 supply conversion sub-circuit 504; the second signal processing sub-circuit 501 is used to send a drive control signal Drv to the second drive sub-circuit 502 according to a preset control program or the isolation voltage drop Vsd in the switch sub-circuit 101 obtained through the differential operational amplifier sub-circuit 505, so that after the second drive sub-circuit 502 adjusts the drive control signal Drv, the adjusted drive control signal Drv is used to trigger the switch sub-circuit 101 to conduct or turn off, so as to adjust the voltage given signal Vout-F to a power supply output signal, that is, a voltage output signal Vout and a current output signal Iout, and send them to the power supply bus.

[0066] Among them, the switch sub-circuit 101 further specifically includes a switch tube Q and a diode D connected in parallel, and the number thereof may specifically be at least two. The corresponding switch tube Q and diode D can be specifically understood as Figure 5 the switch tube Q1 and diode D1 shown in the figure, or any group such as the switch tube Q2 and diode D2, etc.; among them, 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 a drive control signal is received at its gate g, the source S of the switch tube Q can be triggered to conduct or turn off with its drain d; and the third voltage compensation circuit 500 can also be understood as Figure 5 any one of the second voltage compensation circuits 400 shown in the figure, which will not be elaborated here.

[0067] To avoid a decrease in the voltage output signal Vout and the current output signal Iout during the short-circuit detection stage t3, resulting in power supply imbalance, during the short-circuit detection stage t3 and its corresponding delay compensation stage t4, the second signal processing sub-circuit 501 is specifically used 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 in 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 by the second signal processing sub-circuit 501.

[0068] Wherein, the second terminal and the third terminal of the switching transistor Q are the source electrode and the drain electrode respectively.

[0069] S242: Differentially amplify the voltage given signal and the power supply output signal to obtain the isolation voltage drop.

[0070] It can be understood that the second signal processing sub-circuit 501 can use a differential operational amplifier to detect the isolation voltage drop Vsd, that is, the differential operational amplifier sub-circuit 505 differentially amplifies the voltage given signal Vout-F and the voltage output signal Vout in the power supply output signal to obtain the isolation voltage drop Vsd.

[0071] The second signal processing sub-circuit 501 outputs a drive control signal Drv to the second drive sub-circuit 502 of the switching transistor Q, and the second drive sub-circuit 502 realizes the switching process of the switching transistor Q.

[0072] Wherein, the isolation voltage drop Vsd in the switching transistor Q sampled by the second signal processing sub-circuit 501 will be superimposed on the output of the voltage loop, that is, the reference voltage signal Vout-Ref, to compensate it, and after being adjusted by the control sub-circuit 503 and the switching power supply conversion sub-circuit 504, the compensated voltage given signal Vout-F is obtained.

[0073] Correspondingly, the sampling method of the isolation voltage drop Vsd can also be realized by separately sampling the voltage given signal Vout-F and the voltage output signal Vout and taking the difference.

[0074] Please refer to Figure 10 , Figure 10 is Figure 3 a schematic flowchart of an embodiment of S25 in . In one embodiment, the voltage compensation method of the present application further includes some more specific steps in addition to the above S21-S25. Specifically, the above S25 may specifically include the following steps: S2511: In the first switching delay stage corresponding to the drive control signal being adjusted from the second level to the first level, use 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 and increased reference voltage signal.

[0075] Specifically, as Figure 8As shown, the third voltage compensation circuit 500 corresponds to the short-circuit detection stage t3. During the first switch delay stage t1 when the drive control signal Drv is adjusted from the second level to the first level, to compensate for the downward trend of the power supply output signal caused by the drive to turn off 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 specifically adopted 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 and increased reference voltage signal Vout-Ref.

[0076] It should be noted that the second level can be understood as the level state corresponding to the first level, triggering the power isolation circuit 100 to conduct, that is, the drive to turn on the power isolation circuit 100, and it can specifically be a low level or a high level, which is not limited in this application.

[0077] S2512: During the second switch delay stage when the drive control signal is adjusted from the first level to the second level, use 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 and decreased reference voltage signal.

[0078] Similarly, the third voltage compensation circuit 500 corresponds to the delay compensation stage t4. During the second switch delay stage t2 when the drive control signal Drv is adjusted from the first level to the second level, any reasonable second setting function such as a linear decrease function, a curve decrease function, or an arithmetic decrease function can be specifically adopted to gradually adjust and decrease the reference voltage signal Vout-Ref, so as to obtain the compensated voltage given signal Vout-F by using the gradually adjusted and decreased reference voltage signal Vout-Ref.

[0079] It can be understood that after compensating the voltage given signal Vout-F during 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 by 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 a suitable set threshold range to ensure power supply balance and stability, and thus maintain the normal operation of the load device.

[0080] In some embodiments, the duration of the second switch delay stage t2 is less than the duration of the delay compensation stage t4 to ensure sufficient compensation for the voltage given signal Vout-F and effectively maintain the stability of the power supply output signal.

[0081] Specifically, in one embodiment, the above S2511 may further specifically include: when the drive control signal Drv is adjusted from the second level to the first level, performing charge and discharge regulation on the power isolation circuit 100, such as using a constant current source circuit to charge and discharge the gate of the switching transistor 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.

[0082] Specifically, in one embodiment, the above S2512 may further specifically include: when the drive control signal Drv is adjusted from the first level to the second level, performing charge and discharge regulation on the power isolation circuit 100, such as using a constant current source circuit to charge and discharge the gate of the switching transistor Q in the power isolation circuit 100, so as to extend the switching process of the power isolation circuit 100 to obtain the second switching delay stage t2.

[0083] Please refer to Figure 11 , Figure 11 is Figure 3 a schematic flowchart of another embodiment of S25 in S2521: In response to the drive control signal being adjusted from the second level to the first level, compensating and increasing the reference voltage signal by a 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, so as to obtain a compensated voltage given signal by using the compensated reference voltage signal.

[0084] It can be understood that, as Figure 8 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, to compensate for the downward trend of the power supply output signal caused by turning off the drive of the power isolation circuit 100, specifically, the reference voltage signal Vout-Ref can be compensated and increased by a 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 and then ends, so as to obtain a compensated voltage given signal Vout-F by using the compensated reference voltage signal Vout-Ref.

[0085] 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 runs stably after the drive of the power isolation circuit 100 is disconnected, that is, the voltage across the diode connected in parallel with the switching transistor Q after the switching transistor Q is turned off, and it is also the voltage across the source and drain of the switching transistor Q.

[0086] The specific set duration can be the period time corresponding to the program running frequency of the third voltage compensation circuit 500. The first voltage value can be calculated from the steady-state value of the isolation voltage drop Vsd, the duration t1 of the first switching delay stage when the drive control signal Drv adjusts from the second level to the first level, and the program running frequency.

[0087] For example: when the duration t1 of the first switching delay stage is 2 ms, the isolation voltage drop Vsd = 700 mV in the steady state after disconnecting the drive of the switching transistor Q, and the program running frequency is 100 Khz, then the first voltage value is 3.5 mV and ends after the compensation amount reaches 700 mV.

[0088] Among them, compensating and increasing the first voltage value for the reference voltage signal Vout-Ref at intervals of the set duration can also be understood as compensating and increasing the first voltage value for the reference voltage signal Vout-Ref 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 then maintaining it.

[0089] S2522: In response to the drive control signal adjusting from the first level to the second level, compensating and reducing the second voltage value for the reference voltage signal at intervals of the set duration until the cumulative compensation reduction value is equal to the steady-state value, so as to obtain the compensated voltage given signal by using the reference voltage signal with reduced compensation.

[0090] Similarly, for the third voltage compensation circuit 500 corresponding to the delay compensation stage t4, in response to the drive control signal Drv adjusting from the first level to the second level, compensating and reducing the second voltage value for the reference voltage signal Vout-Ref at intervals of the set duration until the cumulative compensation reduction value is equal to the steady-state value of the isolation voltage drop Vsd and then ending, so as to obtain the compensated voltage given signal Vout-F by using the reference voltage signal Vout-Ref with increased compensation.

[0091] Among them, the second voltage value can be calculated from the steady-state value of the isolation voltage drop Vsd, the duration t2 of the second switching delay stage when the drive control signal Drv adjusts from the first level to the second level, and the program running frequency.

[0092] For example: when the duration t2 of the second switching delay stage is 1 ms, the isolation voltage drop Vsd = 700 mV in the steady state after disconnecting the drive of the switching transistor Q, and the program running frequency is 100 Khz, then the second voltage value is 7 mV and ends after the compensation amount reduces from 700 mV to 0.

[0093] Among them, compensating and reducing the second voltage value for the reference voltage signal Vout-Ref at intervals of the set duration can also be understood as compensating and reducing the second voltage value for the reference voltage signal Vout-Ref once in each program running cycle until the compensation amount reduces from 700 mV to 0 and then ending.

[0094] Please refer to Figure 12 , Figure 12 which is a schematic flowchart of the third embodiment of the voltage compensation method of this application. The voltage compensation method of this embodiment is Figure 1 a detailed embodiment flowchart of the voltage compensation method in and specifically includes the following steps:

[0095] Among them, S31 is the same as Figure 1 S11 in

[0096] , and for specific details, please refer to S11 and its related textual descriptions, which will not be elaborated here.

[0097] It can be understood that the power isolation circuit 100 will turn off the drive during the short - circuit detection phase. Thus, 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 phase, and further determine whether to perform voltage compensation.

[0098] Among them, if the drive control signal is not at the first level, then execute S33; if the drive control signal is at the first level, then execute S34.

[0099] S33: Clear the voltage compensation flag after delaying for a preset duration.

[0100] Specifically, when the first voltage compensation circuit 300 determines that the drive control signal is not at the first level, that is, the short - circuit detection phase has ended. To ensure sufficient compensation for the voltage given signal and effectively maintain the stability of the power supply output signal, it is necessary to clear the voltage compensation flag after delaying for a preset duration.

[0101] Among them, this preset duration corresponds to the delay compensation phase. The voltage compensation flag can be understood as a flag for the first voltage compensation circuit 300 to execute the voltage compensation control program. When the voltage compensation flag is set, voltage compensation is performed on the power isolation circuit 100, and after the voltage compensation flag is cleared, the voltage compensation for the power isolation circuit 100 ends.

[0102] S34: Set the voltage compensation flag.

[0103] It can be understood that when the drive control signal is at the first level, it indicates that the power isolation circuit 100 is in the short - circuit detection phase, and it is necessary to set the voltage compensation flag.

[0104] S35: Perform a short - circuit detection on the power isolation circuit during the short - circuit detection phase when the drive control signal is at the first level.

[0105] S36: Obtain the isolation voltage drop in the power isolation circuit during the short - circuit detection phase and its corresponding delay compensation phase.

[0106] Among them, S35 and S36 are respectively the same as Figure 1 S12 and S13 in, for specific details, please refer to S12 and S13 and their related text descriptions, which will not be elaborated here.

[0107] S37: Detect whether the voltage compensation flag is valid.

[0108] Specifically, the first voltage compensation circuit 300 can detect whether the voltage compensation flag is valid to determine whether voltage compensation is required currently.

[0109] Among them, if the voltage compensation flag is valid, then execute S38; if the voltage compensation flag is invalid, then return to execute S32.

[0110] S38: Compensate the voltage given signal by using the isolation voltage drop, so that the power isolation circuit can maintain the power supply output signal within the set threshold range by using the compensated voltage given signal.

[0111] Among them, S38 is the same as Figure 1 S14 in, for specific details, please refer to S14 and its related text descriptions, which will not be elaborated here.

[0112] Please refer to Figure 13 , Figure 13 is the 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 the flow chart of a refined embodiment of the voltage compensation method in, specifically including the following steps: S41: The voltage compensation circuit sends the voltage given signal and the drive control signal to the power isolation circuit, so that the power isolation circuit can obtain the power supply output signal by using the voltage given signal under the action of the drive control signal and send it to the power supply output circuit.

[0113] Among them, S41 is the same as Figure 1 S11 in, for specific details, please refer to S11 and its related text descriptions, which will not be elaborated here.

[0114] S42: During the short - circuit detection phase when the drive control signal is at the first level, detect whether the isolation voltage drop is lower than the preset voltage threshold.

[0115] Specifically, when the first voltage compensation circuit 300 detects a short circuit in 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 detected to determine whether the isolation voltage drop is lower than a preset voltage threshold.

[0116] It should be noted 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 switching transistor in the power isolation circuit 100 has a short circuit, the voltage across the source and drain of the switching transistor will be lower than the conduction voltage drop of the diode connected in parallel therewith when there is no short circuit fault. It is any reasonable voltage threshold set to distinguish whether the switching transistor is short-circuited; the preset voltage threshold can specifically be any reasonable voltage threshold such as 0.2V (volt), 0.3V, etc., and preferably 0.2V. This application does not make any limitations in this regard.

[0117] Among them, if the isolation voltage drop is lower than the preset voltage threshold, then S43 is executed; if the isolation voltage drop is not lower than the preset voltage threshold, then return to execute S44.

[0118] S43: Adjust the voltage given signal to 0.

[0119] 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. To avoid adverse effects on the power supply to the electrical load, it is necessary to disconnect the power supply output of the power isolation circuit 100 with the short circuit fault, that is, adjust the voltage given signal to 0.

[0120] Furthermore, to quickly restore the power supply of the power isolation circuit 100 with the short circuit fault, the first voltage compensation circuit 300 can specifically also issue a short circuit fault alarm, or send a short circuit fault instruction to the background intelligent terminal communicatively connected thereto, so that the background intelligent terminal pops up an alarm message to remind the user of the fault point and that it needs to be processed in time.

[0121] S44: Obtain the isolation voltage drop in the power isolation circuit during the short circuit detection stage and its corresponding delay compensation stage.

[0122] S45: Use the isolation voltage drop to compensate the voltage given signal, so that the power isolation circuit uses the compensated voltage given signal to maintain the power supply output signal within the set threshold range.

[0123] Among them, S44 and S45 are the same as Figure 1 S13 and S14 therein. For specific details, please refer to S13 and S14 and their related textual descriptions, which will not be elaborated here.

[0124] This application also provides an electronic device. Please refer to Figure 14 , Figure 14It is a schematic structural diagram of an embodiment of the 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.

[0125] 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 of the above embodiments. For details, please refer to Figures 1 - 13 and the relevant text content, which will not be elaborated here.

[0126] The beneficial effects of the present application are as follows: Different from the prior art, the voltage compensation method provided by the present application sends a voltage given signal and a drive control signal to a power isolation circuit through a voltage compensation 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 a power supply output circuit, performs short-circuit detection on the power isolation circuit during the short-circuit detection stage when the drive control signal is at the first level, and obtains the isolation voltage drop in the power isolation circuit during the short-circuit detection stage and its corresponding delay compensation stage, and uses the isolation voltage drop to compensate the voltage given signal, so that the power isolation circuit maintains the power supply output signal within the set threshold range using the compensated voltage given signal, thereby being able to compensate the voltage given signal using the isolation voltage drop in the power isolation circuit during the short-circuit detection of the power isolation circuit, 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 supply output circuit, the power isolation circuit to be detected can still share the current with other power isolation circuits in the system to ensure power supply balance and stability, and further maintain the normal operation of the load device; and compensating the voltage given signal by sampling the isolation voltage drop in the power isolation circuit is a closed-loop control scheme, which has good adaptability and can effectively avoid the mismatch problem caused by the differences between power isolation circuits.

[0127] The above is only the embodiment of the present application, and it does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A voltage compensation method, which is applied to voltage compensation in short - circuit detection of a power isolation circuit. The power isolation circuit is used to be coupled with a voltage compensation circuit and a power supply output circuit, and is characterized in that, The voltage compensation method includes: The voltage compensation circuit sends a voltage reference signal and a drive control signal to the power isolation circuit, so that the power isolation circuit obtains a power supply output signal by using the voltage reference signal under the action of the drive control signal, and sends it to the power supply output circuit; Perform a short - circuit detection on the power isolation circuit during the short - circuit detection stage when the drive control signal is at the first level; Obtain the isolation voltage drop in the power isolation circuit during the short - circuit detection stage and its corresponding delay compensation stage; Compensate the voltage reference signal by using the isolation voltage drop, so that the power isolation circuit maintains the power supply output signal within a set threshold range by using the compensated voltage reference signal.

2. The voltage compensation method according to claim 1, characterized in that, Before the step that the voltage compensation circuit sends a voltage reference signal and a drive control signal to the power isolation circuit, so that the power isolation circuit obtains a power supply output signal by using the voltage reference signal under the action of the drive control signal, and sends it to the power supply output circuit, it further includes: Obtain the voltage reference signal by using a reference voltage signal; The compensating the voltage reference signal by using the isolation voltage drop includes: Superimpose the isolation voltage drop on the reference voltage signal to compensate the voltage reference signal.

3. The voltage compensation method according to claim 2, wherein The superimposing the isolation voltage drop on the reference voltage signal to compensate the voltage reference signal includes: During the first switch delay stage corresponding to the drive control signal adjusting from the second level to the first level, use a first set function to adjust and increase the reference voltage signal, so as to obtain the compensated voltage reference signal by using the adjusted and increased reference voltage signal; During the second switch delay stage corresponding to the drive control signal adjusting from the first level to the second level, use a second set function to adjust and decrease the reference voltage signal, so as to obtain the compensated voltage reference signal by using the adjusted and decreased reference voltage signal; wherein, the duration of the second switch delay stage is less than the duration of the delay compensation stage.

4. The voltage compensation method according to claim 3, wherein The during the first switch delay stage corresponding to the drive control signal adjusting from the second level to the first level includes: When the drive control signal adjusts from the second level to the first level, perform charge - discharge adjustment on the power isolation circuit to extend the switching process of the power isolation circuit to obtain the first switch delay stage; The during the second switch delay stage corresponding to the drive control signal adjusting from the first level to the second level includes: When the drive control signal adjusts from the first level to the second level, perform charge - discharge adjustment on the power isolation circuit to extend the switching process of the power isolation circuit to obtain the second switch delay stage.

5. The voltage compensation method according to claim 2, characterized in that The superimposing the isolation voltage drop on the reference voltage signal to compensate the voltage reference signal includes: In response to the driving control signal being adjusted from the second level to the first level, the reference voltage signal is compensated and increased by a 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, so as to obtain the compensated voltage given signal by using the compensated reference voltage signal; In response to the driving control signal being adjusted from the first level to the second level, the reference voltage signal is compensated and decreased by a second voltage value at each set time interval 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 reference voltage signal.

6. The voltage compensation method according to claim 2, characterized in that The power isolation circuit includes a switch sub-circuit, and the switch sub-circuit is used to be coupled with a voltage compensation circuit and a power supply output circuit. Obtaining the isolation voltage drop in the power isolation circuit in the short-circuit detection stage and its corresponding delay compensation stage includes: Obtaining the voltage given signal on the second end of the switch sub-circuit and the power supply output signal on the third end thereof in the short-circuit detection stage and its corresponding delay compensation stage; wherein, when the driving control signal received by the first end of the switch sub-circuit is at the second level, the second end and the third end of the switch sub-circuit are triggered to conduct; Performing differential amplification on the voltage given signal and the power supply output signal to obtain the isolation voltage drop.

7. The voltage compensation method according to any one of claims 1-6, characterized in that, 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 driving control signal is at the first level; If the driving control signal is at the first level, setting the voltage compensation flag; If the driving control signal is not at the first level, clearing the voltage compensation flag after delaying a preset time; wherein, the preset time is equal to the duration of the delay compensation stage; 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, compensating the voltage given signal by using the isolation voltage drop.

8. The voltage compensation method according to any one of claims 1-6, characterized in that, Performing short-circuit detection on the power isolation circuit in the short-circuit detection stage when the driving control signal is at the first level includes: In the short-circuit detection stage when the driving 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.

9. A voltage compensation circuit, characterized in that, The voltage compensation circuit is used to be coupled with the power isolation circuit, and the power isolation circuit is used to be coupled with the power supply output circuit; Wherein, the voltage compensation circuit is used to implement voltage compensation control on the power isolation circuit by adopting the voltage compensation method described in any one of claims 1-8.

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 described in claim 9.

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