Multi-Voltage Tracking Device and Power System

Abstract

This application relates to a multi-voltage tracking device and a power system. The multi-voltage tracking device includes: a controller, a multi-voltage tracking circuit, and an output circuit. The controller is connected to a first power supply and at least one second power supply and is configured to: control the first power supply to output a first voltage signal and control the second power supply to output a second voltage signal. The multi-voltage tracking circuit includes: a voltage follower circuit connected to the first power supply, an amplifier circuit connected to the voltage follower circuit, and a drive circuit connected to the amplifier circuit and the second power supply, and is configured to: form an output voltage signal based on the first voltage signal and the second voltage signal. The output circuit is connected to the drive circuit and is configured to: receive and transmit the output voltage signal, and the output voltage signal is equal to the first voltage signal. This application can greatly improve the voltage output accuracy, the voltage fluctuation response speed, reduce costs, and simplify the device.

Description

Technical Field

[0001] This application relates to the technical field of voltage tracking, and particularly to a multi-voltage tracking device and a power system. Background Art

[0002] Currently, multi-voltage tracking devices mainly achieve voltage tracking through multiple voltage sensors and connected controllers. Although these voltage sensors and controllers can monitor voltage changes in real time and adjust the voltage according to the algorithms preset in the controller, there are deficiencies in the output accuracy of the voltage, and they are not suitable for high-precision circuits.

[0003] Although the aforementioned multi-voltage tracking device achieves voltage tracking to a certain extent, there are still many problems. For example, when processing high-voltage signals, due to the accuracy problems of the voltage sensors, the multi-voltage tracking device is prone to large errors; when dealing with sudden voltage fluctuations, the multi-voltage tracking device has a problem of slow response speed, which easily limits its application scope; and usually multiple voltage sensors and controllers need to be set in the multi-voltage tracking device, which easily increases the device cost and device complexity; and so on. Summary of the Invention

[0004] Based on this, some embodiments of this application provide a multi-voltage tracking device and a power system, which improve the voltage output accuracy and the following response speed during voltage fluctuations, thereby facilitating the expansion of the application scope of the device, especially applicable to high-precision circuits, and can also effectively reduce costs and simplify the device.

[0005] To achieve the above object, on the one hand, some embodiments of this application provide a multi-voltage tracking device. The multi-voltage tracking device includes: a controller, a multi-voltage tracking circuit, and an output circuit. The controller is connected to a first power supply and at least one second power supply, and is configured to: control the first power supply to output a first voltage signal, and control the second power supply to output a second voltage signal. The multi-voltage tracking circuit includes: a voltage follower circuit connected to the first power supply, an amplifier circuit connected to the voltage follower circuit, and a drive circuit connected to the amplifier circuit and the second power supply. The output circuit is connected to the drive circuit and is configured to: receive and transmit an output voltage signal. Wherein, the voltage follower circuit is configured to: follow the first voltage signal to form a first following voltage signal. The amplifier circuit is configured to: scale the first following voltage signal to form a first scaled voltage signal; and scale the second following voltage signal to form a second scaled voltage signal. The drive circuit is configured to: follow the output voltage signal to form a second following voltage signal and transmit the second following voltage signal to the amplifier circuit; and perform a differential process on the first scaled voltage signal and the second scaled voltage signal to form a drive signal, and form an output voltage signal in response to the drive signal and the second voltage signal; the output voltage signal is equal to the first voltage signal.

[0006] In some embodiments of the present application, the multi-voltage tracking device further includes a feedback circuit. The feedback circuit is connected to the output circuit and the controller, and is configured to: collect the output voltage signal, form a feedback voltage signal, and transmit the feedback voltage signal to the controller. Accordingly, the controller is further configured to: identify a fault in response to the feedback voltage signal; generate a shutdown control instruction in response to the fault.

[0007] In some embodiments of the present application, the voltage following circuit is connected to the first power supply through the first switch circuit, and is further configured to: follow the first voltage signal to form a first following voltage signal when the first switch circuit is turned on. The driving circuit is connected to the second power supply and the output circuit through the second switch circuit, and is further configured to: transmit a driving signal to the second switch circuit to control the conduction degree of the second switch circuit according to the driving signal, and cause the second switch circuit to provide an output voltage signal to the output circuit in response to the driving signal and the second voltage signal.

[0008] In some embodiments of the present application, the voltage following circuit includes a first operational amplifier. The first operational amplifier includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin, and an eighth pin. Among them, the first pin of the first operational amplifier is connected to the second pin of the first operational amplifier. The third pin of the first operational amplifier is connected to the first switch circuit, and the first switch circuit is further connected to the first power supply through a first resistor. The fourth pin of the first operational amplifier is connected to the negative terminal of the floating power supply. The fifth pin of the first operational amplifier is connected to the reference ground of the floating power supply. The sixth pin of the first operational amplifier is connected to the seventh pin of the first operational amplifier. The eighth pin of the first operational amplifier is connected to the positive terminal of the floating power supply.

[0009] In some embodiments of the present application, the amplifying circuit includes a second operational amplifier. The second operational amplifier includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin, and an eighth pin. Among them, a first capacitor-resistor parallel circuit is connected in series between the first pin and the second pin of the second operational amplifier. The second pin of the second operational amplifier is further connected to the reference ground terminal of the floating power supply through a second capacitor-resistor parallel circuit. The third pin of the second operational amplifier is connected to the voltage following circuit through a second resistor. The fourth pin of the second operational amplifier is connected to the negative terminal of the floating power supply. The fifth pin of the second operational amplifier is connected to the driving circuit through a third resistor. A third capacitor-resistor parallel circuit is connected in series between the sixth pin and the seventh pin of the second operational amplifier. The sixth pin of the second operational amplifier is further connected to the reference ground terminal of the floating power supply through a fourth capacitor-resistor parallel circuit. The seventh pin of the second operational amplifier is further connected to the driving circuit through a fourth resistor. The eighth pin of the second operational amplifier is connected to the positive terminal of the floating power supply.

[0010] In some embodiments of the present application, the driving circuit includes a third operational amplifier. The third operational amplifier includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin, and an eighth pin. Among them, a fifth capacitor-resistor parallel circuit is connected in series between the first pin and the second pin of the third operational amplifier. The first pin of the third operational amplifier is also connected to a second switching circuit. The second pin of the third operational amplifier is also connected to an amplifying circuit through a fourth resistor. The third pin of the third operational amplifier is connected to the amplifying circuit through a fifth resistor. The third pin of the third operational amplifier is also connected to a floating power supply reference ground through a sixth capacitor-resistor parallel circuit. The fourth pin of the third operational amplifier is connected to the negative voltage terminal of the floating power supply. The fifth pin of the third operational amplifier is connected to the second switching circuit through a sixth resistor. The sixth pin of the third operational amplifier is connected to the seventh pin of the third operational amplifier. The seventh pin of the third operational amplifier is connected to the amplifying circuit through a third resistor. The eighth pin of the third operational amplifier is connected to the positive voltage terminal of the floating power supply.

[0011] In some embodiments of the present application, the second switching circuit includes a switching power transistor and a first protection circuit. The first protection circuit includes an overvoltage protection circuit and a voltage-dividing current-limiting circuit. Among them, the switching power transistor includes a control terminal, a first terminal, and a second terminal; the control terminal is connected to the driving circuit through a seventh resistor. The overvoltage protection circuit is connected to the control terminal and the first terminal of the switching power transistor. The voltage-dividing current-limiting circuit includes an eighth resistor connected between the control terminal and the second terminal of the switching power transistor, and a ninth resistor connected between the second terminal and the second power supply.

[0012] In some embodiments of the present application, the second switching circuit further includes a second protection circuit. The second protection circuit is connected to the switching power transistor, the second power supply, the output circuit, and the driving circuit, and is configured to perform at least one of overvoltage protection, voltage-dividing current-limiting, voltage stabilization protection, and filtering protection on the output voltage signal.

[0013] In some embodiments of the present application, both the first power supply and the second power supply are high-voltage power supplies. The multi-voltage tracking device further includes a first isolation chip connected between the controller and the first power supply, and a second isolation chip connected between the controller and the second power supply.

[0014] In some embodiments of the present application, the first switching circuit is also connected to the second power supply. The multi-voltage tracking device further includes a switching control circuit. The switching control circuit is connected to the first switching circuit and the controller, and is configured to: in response to a switching control instruction of the controller, select to conduct the first power supply and / or the second power supply.

[0015] In some embodiments of the present application, the switch control circuit includes: an optical fiber transmitter and an optical fiber receiver. The optical fiber transmitter is connected to the controller and is configured to: generate an optical fiber transmission signal in response to a control instruction of the controller. The optical fiber receiver is connected to the first switch circuit and is configured to: receive the optical fiber transmission signal and generate a switch control instruction according to the optical fiber transmission signal.

[0016] On the other hand, some embodiments of the present application further provide a power system, including the multi-voltage tracking device described in any of the above embodiments.

[0017] The embodiments of the present application may have at least the following advantages:

[0018] In the embodiments of the present application, through the controller and the multi-voltage tracking circuit connecting the first power supply and the second power supply, the multi-voltage tracking circuit can form an output voltage signal according to the first voltage signal provided by the first power supply and the second voltage signal provided by the second power supply, and ensure that the output circuit outputs an output voltage signal equal to the first voltage signal. In this way, for the voltage signals provided by multiple power supplies, compared with the problem in the related art that voltage sensors and controllers are respectively set for each power supply, and the voltage sensors have their own range errors and the power supplies have their own temperature drifts, in the multi-voltage tracking device provided by the embodiments of the present application, not only do not need to set voltage sensors, but also can greatly reduce the number of controllers, which is beneficial to reducing costs and simplifying the device. In addition, the temperature drift of the power supply can be taken into account, and the first voltage signal provided by the target power supply (i.e., the first power supply) can be tracked in real time and accurately output, so as to effectively improve the voltage output accuracy and the following response speed when the voltage fluctuates, which is beneficial to expanding the application range of the multi-voltage tracking device, especially can be applied to high-precision circuits with high-voltage output.

[0019] The details of one or more embodiments of the present application are set forth in the following drawings and description. Other features, objects, and advantages of the present application will become apparent from the specification, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a structural block diagram of a multi-voltage tracking device provided in some embodiments;

[0022] Figure 2 It is a structural block diagram of another multi-voltage tracking device provided in some embodiments;

[0023] Figure 3 Block diagram of another multi - voltage tracking device provided in some embodiments;

[0024] Figure 4 Block diagram of another multi - voltage tracking device provided in some embodiments;

[0025] Figure 5 For Figure 4 Circuit schematic diagram of the multi - voltage tracking device shown;

[0026] Figure 6 Circuit schematic diagram of a controller connecting a first power supply and a second power supply provided in some embodiments;

[0027] Figure 7 Circuit schematic diagram of a switch control circuit provided in some embodiments.

[0028] Description of reference numerals:

[0029] 10 - Controller, 20 - Multi - voltage tracking circuit, 201 - First switch circuit, 202 - Voltage follower circuit, 203 - Amplification circuit, 204 - Driver circuit, 205 - Second switch circuit, 30 - Output circuit, 40 - First power supply, 50 - Second power supply, 60 - Feedback circuit, 601 - Voltage acquisition circuit, 602 - Feedback processing circuit, 251 - Over - voltage protection circuit, 252 - Voltage - dividing and current - limiting circuit, 70 - Switch control circuit, 71 - Optical fiber transmitter, 72 - Optical fiber receiver, 81 - First isolation chip, 82 - Second isolation chip. Detailed implementation manners

[0030] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the description of the present application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0032] It should be understood that when an element or layer is referred to as being "on", "adjacent to", or "connected to" another element or layer, it can be directly on, adjacent to, connected, or coupled to the other element or layer, or there can be intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers, doping types, and / or portions, these elements, components, regions, layers, doping types, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer, doping type, or portion from another element, component, region, layer, doping type, or portion. Thus, without departing from the teachings of the present application, the first element, component, region, layer, doping type, or portion discussed below can be referred to as the second element, component, region, layer, or portion.

[0033] As used herein, the singular forms "a", "an", and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that when the terms "comprises" and / or "comprising" are used in this specification, the presence of the described features, integers, steps, operations, elements, and / or components can be determined, but one or more other features, integers, steps, operations, elements, components, and / or groups are not excluded from being present or added. At the same time, as used herein, the term "and / or" includes any and all combinations of the related listed items.

[0034] Some embodiments of the present application provide a multi-voltage tracking device. Please refer to Figure 1 , the multi-voltage tracking device includes: a controller 10, a multi-voltage tracking circuit 20, and an output circuit 30. The controller 10 is connected to a first power supply 40 and at least one second power supply 50, and is configured to: control the first power supply 40 to output a first voltage signal, and control the second power supply 50 to output a second voltage signal. The multi-voltage tracking circuit 20 is connected to the first power supply 40 and the second power supply 50, and is configured to: form an output voltage signal according to the first voltage signal and the second voltage signal. The output circuit 30 is connected to the multi-voltage tracking circuit 20, and is configured to: receive and transmit the aforementioned output voltage signal, and the output voltage signal is equal to the first voltage signal.

[0035] Here, the output voltage signal being equal to the first voltage signal includes: the voltage values of the two are the same, and the deviation value between the two voltages is within the allowable range of the error accuracy. The allowable range of the error accuracy can be selected and set according to the requirements, and the embodiments of the present application do not limit this.

[0036] Optionally, the first power supply 40 and the second power supply 50 include but are not limited to high-voltage power supplies. The high voltage mentioned here and hereinafter refers to a voltage with a voltage level lower than (-1000V), for example, it can be a high voltage within the range of (-10) KV to (-50) KV (including the endpoints).

[0037] Optionally, the controller 10 includes, but is not limited to, a Micro Controller Unit (MCU).

[0038] Optionally, the multi - voltage tracking circuit 20 is further connected to the controller 10, and the multi - voltage tracking circuit 20 is configured to: in response to a control instruction of the controller 10, form an output voltage signal according to a first voltage signal and a second voltage signal.

[0039] In the embodiment of the present application, through the controller 10 and the multi - voltage tracking circuit 20 connected to the first power supply 40 and the second power supply 50, the multi - voltage tracking circuit 20 can form an output voltage signal according to the first voltage signal provided by the first power supply 40 and the second voltage signal provided by the second power supply 50, and ensure that the output circuit 30 outputs an output voltage signal equal to the first voltage signal. In this way, for the voltage signals provided by multiple power supplies, compared with the related art where a voltage sensor and a controller are respectively set for each power supply, and the voltage sensor has its own range error and the power supply has its own temperature drift, in the multi - voltage tracking device provided by the embodiment of the present application, not only is it unnecessary to set a voltage sensor and the number of controllers can be greatly reduced, which is beneficial to reducing costs and simplifying the device, but also the temperature drift of the power supply can be taken into account, and the first voltage signal provided by the target power supply (i.e., the first power supply 40) can be tracked in real - time and accurately output, so as to effectively improve the voltage output accuracy and the following response speed when the voltage fluctuates, which is thus beneficial to expanding the application range of the multi - voltage tracking device, especially applicable to high - precision circuits with high - voltage output.

[0040] In addition, the multi - voltage tracking device provided by the embodiment of the present application has a modular design function, that is: according to actual requirements, the number and type of the multi - voltage tracking circuit 20 and the controller 10 can be flexibly configured to achieve a balance between cost and performance. Exemplarily, the multi - voltage tracking device can only include one multi - voltage tracking circuit 20 and one controller 10 to meet the needs of high - precision circuits.

[0041] In some embodiments of the present application, please refer to Figure 2 , the multi - voltage tracking device further includes a feedback circuit 60. The feedback circuit 60 is connected to the output circuit 30 and the controller 10, and is configured to: collect the output voltage signal, form a feedback voltage signal, and transmit the feedback voltage signal to the controller 10. Correspondingly, the controller 10 is further configured to: identify a fault in response to the feedback voltage signal; generate a shutdown control instruction in response to the fault.

[0042] Here, the fault includes a power supply fault (such as the first power supply 40 and / or the second power supply 50) or a multi - voltage tracking circuit 20 fault.

[0043] In the embodiments of the present application, the feedback circuit 60 can collect the output voltage signal as the feedback voltage signal and transmit the feedback voltage signal to the controller 10, so that the controller 10 can identify the fault in response to the feedback voltage signal and generate a shutdown control instruction in response to the fault, thereby realizing the closed-loop detection of the multi-voltage tracking device. Moreover, when the controller 10 identifies the aforementioned fault, it can generate a shutdown control instruction to control the corresponding device in the power system to stop immediately without affecting the normal operation of other devices, thereby ensuring the stability and reliability of the multi-voltage tracking device and the power system.

[0044] In addition, optionally, the controller 10 is further configured to: generate an alarm instruction in response to the fault for warning. The warning signal includes at least one of but not limited to sound, light and electrical signals.

[0045] In some embodiments of the present application, please refer to Figure 3 , the feedback circuit 60 includes a voltage acquisition circuit 601 and a feedback processing circuit 602. The voltage acquisition circuit 601 is connected to the output circuit 30 and is configured to: collect the output voltage signal of the output circuit 30. The feedback processing circuit 602 is connected to the voltage acquisition circuit 601 and the controller 10 and is configured to: receive the output voltage signal collected by the voltage acquisition circuit 601, perform analog-to-digital conversion on the output voltage signal to form a digital signal and transmit it to the controller 10.

[0046] Here, the analog-to-digital conversion of the output voltage signal can be manifested as, for example: after performing multiple filtering processes on the sampled analog signal of the output voltage signal, it is then converted into a digital signal.

[0047] Optionally, the voltage acquisition circuit 601 and the feedback processing circuit 602 can be integrated into an integrated structure, for example, they can be integrated into a continuous self-calibrating analog-to-digital (A / D) converter or a continuous self-calibrating analog-to-digital conversion chip.

[0048] Optionally, the continuous self-calibrating analog-to-digital (A / D) converter or the continuous self-calibrating analog-to-digital conversion chip can communicate using IIC (Inter-Integrated Circuit).

[0049] In some embodiments of the present application, please combine Figure 4It is understood that the multi-voltage tracking circuit 20 includes: a voltage follower circuit 202 connected to the first power supply 40, an amplifier circuit 203 connected to the voltage follower circuit 202, and a drive circuit 204 connected to the amplifier circuit 203, the second power supply 50, and the output circuit 30. Among them, the voltage follower circuit 202 is configured to: follow the first voltage signal to form a first follower voltage signal. The amplifier circuit 203 is configured to: scale the first follower voltage signal to form a first scaled voltage signal; and scale the second follower voltage signal to form a second scaled voltage signal. The drive circuit 204 is configured to: follow the output voltage signal to form a second follower voltage signal and transmit the second follower voltage signal to the amplifier circuit 203; and perform a differential process on the first scaled voltage signal and the second scaled voltage signal to form a drive signal, and in response to the drive signal and the second voltage signal, form an output voltage signal, and the output voltage signal is equal to the first voltage signal.

[0050] Here, the drive signal can make the circuit reach a steady state, that is, the overall circuit of the multi-voltage tracking device reaches a steady state.

[0051] Optionally, the voltage follower circuit 202 is connected to the first power supply 40 through the first switch circuit 201, and is further configured to: when the first switch circuit 201 is turned on, follow the first voltage signal to form a first follower voltage signal.

[0052] Optionally, the drive circuit 204 is connected to the second power supply 50 and the output circuit 30 through the second switch circuit 205, and is further configured to: transmit the drive signal to the second switch circuit 205 to control the conduction degree of the second switch circuit 205 according to the drive signal, and make the second switch circuit 205 provide an output voltage signal to the output circuit 30 in response to the drive signal and the second voltage signal.

[0053] In the embodiment of the present application, when the controller 10 controls the first power supply 40 and the second power supply 50 to output two high voltages respectively, the multi-voltage tracking circuit 20 needs to accurately track the first voltage signal output by the first power supply 40. The multi-voltage tracking circuit 20 adopts the foregoing structure and can be used as a high-precision multi-voltage tracking circuit; that is, the multi-voltage tracking circuit 20 has high sensitivity and high precision, can accurately capture the minute voltage changes in the circuit and the influence of temperature drift on the output voltage signal, and process and absorb and share other redundant voltage signals other than the output voltage signal (the first voltage signal). At the same time, the multi-voltage tracking circuit 20 also has strong anti-interference ability and can effectively eliminate the influence of external noise on the output voltage signal.

[0054] It is worth mentioning that the first switch circuit 201, voltage follower circuit 202, amplifier circuit 203, drive circuit 204, and second switch circuit 205 in the above multi-voltage tracking circuit 20 can be composed of various types of electronic components connected in series and parallel to ensure the corresponding circuit functions. Some possible implementation manners are exemplarily provided in the following embodiments of the present application.

[0055] Exemplarily, please refer to Figure 5 , the first switch circuit 201 includes, but is not limited to, a high-voltage relay SW1. The first switch circuit 201 is connected to the first power supply 40 through the first resistor R1.

[0056] Exemplarily, please refer to Figure 5 , the voltage follower circuit 202 includes a first operational amplifier U1. The first operational amplifier includes a first pin U1-1, a second pin U1-2, a third pin U1-3, a fourth pin U1-4, a fifth pin U1-5, a sixth pin U1-6, a seventh pin U1-7, and an eighth pin U1-8. Among them, the first pin U1-1 of the first operational amplifier U1 is connected to the second pin U1-2 of the first operational amplifier U1. The third pin U1-3 of the first operational amplifier U1 is connected to the first switch circuit 201. The fourth pin U1-4 of the first operational amplifier U1 is connected to the floating power supply negative voltage terminal VEE. The fifth pin U1-5 of the first operational amplifier U1 is connected to the floating power supply reference ground terminal F. The sixth pin U1-6 of the first operational amplifier U1 is connected to the seventh pin U1-7 of the first operational amplifier U1. The eighth pin U1-8 of the first operational amplifier U1 is connected to the floating power supply positive voltage terminal VDD.

[0057] Exemplarily, as shown in Figure 5 , a resistor R18 can be connected between the first switch circuit 201 and the third pin U1-3 of the first operational amplifier U1 to the floating power supply reference ground terminal F.

[0058] In the embodiment of the present application, the voltage follower circuit 202 uses the first operational amplifier U1, which can not only effectively reduce the signal loss caused by the mismatch between the high output impedance and the low input impedance of the next stage, play a buffering role, but also present a high impedance to the previous stage circuit and a low impedance to the subsequent stage circuit, playing an isolation role to isolate adjacent stage circuits to reduce the interference between adjacent stage circuits. In addition, the voltage follower circuit 202 is connected to the first switch circuit 201 and the amplifier circuit 203, and can also form a first following voltage signal by the operational amplifier following the first voltage signal to match the impedance between circuit levels and enhance the load-carrying capacity of the output circuit 30.

[0059] Exemplarily, please continue to refer to Figure 5, the amplifier circuit 203 includes a second operational amplifier U2. The second operational amplifier U2 includes a first pin U2-1, a second pin U2-2, a third pin U2-3, a fourth pin U2-4, a fifth pin U2-5, a sixth pin U2-6, a seventh pin U2-7 and an eighth pin U2-8. Among them, the first pin U2-1 of the second operational amplifier U2 and the second pin U2-2 of the second operational amplifier U2 are connected in series through a first capacitor-resistor parallel circuit RC1. The second pin U2-2 of the second operational amplifier U2 is also connected to the floating power supply reference ground terminal F through a second capacitor-resistor parallel circuit RC2. The third pin U2-3 of the second operational amplifier U2 is connected to the voltage follower circuit 202 through a second resistor R2, for example, connected to the first pin U1-1 of the first operational amplifier U1. The fourth pin U2-4 of the second operational amplifier U2 is connected to the negative voltage terminal VEE of the floating power supply. The fifth pin U2-5 of the second operational amplifier U2 is connected to the drive circuit 204 through a third resistor R3. The sixth pin U2-6 of the second operational amplifier U2 is connected in series with the seventh pin U2-7 of the second operational amplifier U2 through a third capacitor-resistor parallel circuit RC3. The sixth pin U2-6 of the second operational amplifier U2 is also connected to the reference ground terminal F of the floating power supply through a fourth capacitor-resistor parallel circuit RC4. The seventh pin U2-7 of the second operational amplifier U2 is also connected to the drive circuit 204 through a fourth resistor R4. The eighth pin U2-8 of the second operational amplifier U2 is connected to the positive voltage terminal VDD of the floating power supply.

[0060] Here, the first capacitor-resistor parallel circuit RC1, the second capacitor-resistor parallel circuit RC2, the third capacitor-resistor parallel circuit RC3 and the fourth capacitor-resistor parallel circuit RC4 are all composed of corresponding resistors (for example, resistor R10, resistor R20, resistor R30, resistor R40) and capacitors (for example, capacitor C10, capacitor C20, capacitor C30, capacitor C40) connected in parallel.

[0061] For example, Figure 5 As shown in FIG. 1 , the fifth pin U2 - 5 of the second operational amplifier U2 and the third resistor R3 may be connected to the floating power supply reference ground terminal F via the resistor R19 .

[0062] In the embodiment of the present application, the amplification circuit 203 uses a second operational amplifier U2, which can match the resistor R10 and the resistor R20 to amplify or reduce the first follower voltage signal, and match the capacitor C10 and the capacitor C20 for filtering, thereby meeting the circuit requirements, forming a first scaled voltage signal, and transmitting the first scaled voltage signal to the third pin U3-3 of the third operational amplifier U3 through the fifth resistor R5 and the sixth capacitor-resistor parallel circuit RC6.

[0063] For example, please refer to Figure 5, the driving circuit 204 includes a third operational amplifier U3. The third operational amplifier U3 includes a first pin U3-1, a second pin U3-2, a third pin U3-3, a fourth pin U3-4, a fifth pin U3-5, a sixth pin U3-6, a seventh pin U3-7, and an eighth pin U3-8. Among them, a fifth capacitor-resistor parallel circuit RC5 is connected in series between the first pin U3-1 and the second pin U3-2 of the third operational amplifier U3. The first pin U3-1 of the third operational amplifier U3 is also connected to the second switching circuit 205. The second pin U3-2 of the third operational amplifier U3 is also connected to the amplifying circuit 203 through a fourth resistor R4, for example, connected to the seventh pin U2-7 of the second operational amplifier U2. The third pin U3-3 of the third operational amplifier U3 is connected to the amplifying circuit 203 through a fifth resistor R5, for example, connected to the first pin U2-1 of the second operational amplifier U2. The third pin U3-3 of the third operational amplifier U3 is also connected to the floating power supply reference ground terminal F through a sixth capacitor-resistor parallel circuit RC6. The fourth pin U3-4 of the third operational amplifier U3 is connected to the floating power supply negative voltage terminal VEE. The fifth pin U3-5 of the third operational amplifier U3 is connected to the output circuit 30 through a sixth resistor R6. The sixth pin U3-6 of the third operational amplifier U3 is connected to the seventh pin U3-7 of the third operational amplifier U3. The seventh pin U3-7 of the third operational amplifier U3 is connected to the amplifying circuit 203 through a third resistor R3, for example, connected to the fifth pin U2-5 of the second operational amplifier U2. The eighth pin U3-8 of the third operational amplifier U3 is connected to the floating power supply positive voltage terminal VDD.

[0064] Here, the fifth capacitor-resistor parallel circuit RC5 and the sixth capacitor-resistor parallel circuit RC6 are respectively composed of corresponding resistors (such as resistor R50, resistor R60) and capacitors (such as capacitor C50, capacitor C60) connected in parallel.

[0065] In the embodiments of the present application, the output voltage signal of the output circuit 30 can be transmitted through the resistor R6 to the fifth pin U3-5 of the third operational amplifier U3 for voltage following to form a second following voltage signal, and the second following voltage signal is transmitted through the third resistor R3 to the amplifying circuit 203 (i.e., the fifth pin U2-5 of the second operational amplifier U2), so that the amplifying circuit 203 matches the resistors R30 and R40 to amplify or reduce the second following voltage signal, and matches the capacitors C30 and C40 for filtering, so as to meet the circuit requirements, form a second scaled voltage signal, and the second scaled voltage signal is transmitted through the fourth resistor R4 and the fifth capacitor-resistor parallel circuit RC5 to the first pin U3-1 of the third operational amplifier U3, so as to perform differential processing on the first scaled voltage signal and the second scaled voltage signal to form a driving signal, and transmit the driving signal to the second switching circuit 205 to control the conduction degree of the second switching circuit 205 according to the driving signal.

[0066] In some embodiments of the present application, please continue to refer to Figure 5 , the second switching circuit 205 includes: a switching power transistor Q1 and a first protection circuit. The first protection circuit includes an overvoltage protection circuit 251 and a voltage dividing and current limiting circuit 252. Among them, the switching power transistor Q1 includes a control terminal, a first terminal and a second terminal; the control terminal is connected to the driving circuit 204 through the seventh resistor R7, for example, connected to the first pin U3-1 of the third operational amplifier U3. The overvoltage protection circuit 251 is connected to the control terminal and the first terminal of the switching power transistor Q1, and the overvoltage protection circuit 251 can be, for example, the first diode D1. The voltage dividing and current limiting circuit 252 includes: an eighth resistor R8 connected to the control terminal and the second terminal of the switching power transistor Q1, and a ninth resistor R9 connected to the second terminal of the switching power transistor Q1 and the second power supply 50.

[0067] Exemplarily, the switching power transistor Q1 includes, but is not limited to, a MOS transistor (i.e., Metal-Oxide-Semiconductor Field Effect Transistor, abbreviated as MOSFET). The switching power transistor Q1 adopts a MOS transistor, which can quickly respond based on the MOS transistor's on technology and quickly respond to sudden voltage fluctuations to effectively improve the response speed and system stability of the electronic system. The control terminal of the switching power transistor Q1 is, for example, the gate terminal, the first terminal is, for example, the source terminal, and the second terminal is, for example, the drain terminal. In this way, the overvoltage protection circuit 251 can perform overvoltage protection on the gate-source terminal of the switching power transistor Q1. The voltage dividing and current limiting circuit 252 can perform voltage division and current limiting on the switching power transistor Q1.

[0068] In the embodiments of the present application, the driving signal formed by the driving circuit 204 can conductively control the switching power transistor Q1 through the seventh resistor R7 (current-limiting resistor). Moreover, in the embodiments of the present application, by controlling the conduction degree of the switching power transistor Q1, the output circuit 30 can output an output voltage signal that is the same as the first voltage signal provided by the first power supply 40, realizing a 1:1 follow-up of the output voltage signal to the first voltage signal.

[0069] In some embodiments of the present application, please continue to refer to Figure 5 , the second switching circuit 205 further includes a second protection circuit. The second protection circuit is connected to the switching power transistor Q1, the second power supply 50, the output circuit 30, and the driving circuit 204, and is configured to perform at least one of overvoltage protection, voltage division and current limiting, voltage stabilization protection, and filtering protection on the output voltage signal.

[0070] Exemplarily, as Figure 5 shown, the second protection circuit includes a plurality of diodes, such as the second diode D2, the third diode D3, the fourth diode D4, and the fifth diode D5, etc., and can perform overvoltage protection on the switching power transistor Q1 through each diode to prevent the switching power transistor Q1 from being damaged by the high voltage provided by the second power supply 50. The second protection circuit includes a plurality of inductors, such as the first inductor L1, the second inductor L2, the third inductor L3, and the fourth inductor L4, etc., and can prevent sudden changes in current through each inductor. The second protection circuit includes a plurality of filter capacitors, such as the first filter capacitor C11, the second filter capacitor C12, the third filter capacitor C13, and the fourth filter capacitor C14, and can filter out noise and effectively stabilize the output voltage through each filter capacitor.

[0071] In addition, as Figure 5 shown, a plurality of voltage division and current limiting resistors, such as the resistor R11, the resistor R12, the resistor R13, the resistor R14, the resistor R15, the resistor R16, and the resistor R17, etc., can also be provided in the second protection circuit to ensure that the power consumption of the second switching circuit 205 is stable within a certain range through each voltage division and current limiting resistor.

[0072] It can be understood that the quantity and specifications of each diode, each inductor, each filter capacitor, and each voltage division and current limiting resistor in the second protection circuit can be selected and set according to the requirements. The following embodiments of the present application exemplarily provide a possible implementation.

[0073] In some embodiments of the present application, please refer to Figure 5, the second protection circuit includes a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a first inductor L1, a second inductor L2, a third inductor L3, a fourth inductor L4, a first filter capacitor C11, a second filter capacitor C12, a third filter capacitor C13, a fourth filter capacitor C14, resistors R11, R12, R13, R14, R15, R16 and R17. Among them, the cathode of the second diode D2 is connected to the anode of the fourth diode D4. The anode of the second diode D2 is connected to the voltage dividing and current limiting circuit 252 through the first inductor L1, for example, one end of the ninth resistor R9 far away from the switching power transistor Q1. The cathode of the fourth diode D4 is connected to the first end of the power transistor Q1 through the third inductor L3. Resistor R11 is connected in parallel across both ends of the second diode D2. Resistor R13 is connected in parallel across both ends of the fourth diode D4. The first filter capacitor C11 is connected in parallel across both ends of the anode of the second diode D2 and the cathode of the fourth diode D4. The cathode of the third diode D3 is connected to the anode of the fifth diode D5. The anode of the second diode D2 is also connected to the first filter capacitor C11 and the second inductor L2 through the resistor R15, and the end of the second inductor L2 far away from the resistor R15 is connected to the anode of the third diode D3. The cathode of the fourth diode D4 is connected to the first filter capacitor C11 and the fourth inductor L4 through the resistor R16, and the end of the fourth inductor L4 far away from the resistor R16 is connected to the cathode of the fifth diode D5. Resistor R12 is connected in parallel across both ends of the third diode D3. Resistor R14 is connected in parallel across both ends of the fifth diode D5. The second filter capacitor C12 is also connected in parallel across both ends of the anode of the third diode D3 and the cathode of the fifth diode D5. The cathode of the fifth diode D5 is connected to the floating power supply reference ground terminal F and the output circuit 30. One end of the resistor R16 connected to the first filter capacitor C11 is also connected to the driving circuit 204 through the sixth resistor R6, for example, connected to the fifth pin U3-5 of the third operational amplifier U3, and connected to the ground PGND through the third filter capacitor C13 and the resistor R17. The third filter capacitor C13 and the resistor R17 are connected in parallel. The cathode of the fifth diode D5 is also connected to the ground PGND through the fourth filter capacitor C14.

[0074] Exemplarily, as Figure 5 shown, the ninth resistor R9 in the voltage dividing and current limiting circuit 252 can be connected to the second power supply 50 through the first inductor L1, the resistor R15 and the second inductor L2 connected in sequence in the second protection circuit.

[0075] It should be added that in some embodiments of the present application, please refer to Figure 6 , both the first power supply 40 and the second power supply 50 are high-voltage power supplies. The multi-voltage tracking device further includes: a first isolation chip 81 connected between the controller 10 and the first power supply 40, and a second isolation chip 82 connected between the controller 10 and the second power supply 50.

[0076] In the embodiments of the present application, the controller 10 does not directly control the first power supply 40 and the second power supply 50. Instead, isolation control can be performed through the first isolation chip 81 and the second isolation chip 82, effectively preventing electrical interference and magnetic signal interference, thereby protecting the power system from damage by the external environment. At the same time, it is also conducive to improving the fault tolerance and reliability of the multi-voltage tracking device and the power system.

[0077] In addition, when the controller 10 performs isolation control on the first power supply 40 and the second power supply 50, software and hardware isolation can also be achieved through a memory partitioning mechanism and a Memory Protection Unit (MPU), so as to prevent malware or viruses from invading the controller 10 and the core part of the power system, improving the security of the power system, and being able to better allocate and process the system resources of the power system to improve the overall efficiency and response speed of the power system. Moreover, when the controller 10 performs isolation control on the first power supply 40 and the second power supply 50, it can also eliminate the ground loop, isolate noise, and reduce the interference of the external environment on the signal, so as to ensure the system stability of the power system, improve the signal integrity and transmission efficiency of the power system, and thus enhance the overall performance.

[0078] It can be understood that the first isolation chip 81 and the second isolation chip 82 can be selected and set according to requirements, and the embodiments of the present application do not limit this, as long as the corresponding functions can be realized.

[0079] Optionally, as Figure 6 shown, both the first isolation chip 81 and the second isolation chip 82 have multiple functional pins, and one or more pull-up resistors and one or more pull-down resistors can be connected to match each functional pin. For example, Figure 6 the resistors R23, R24, R27, and R28 shown are pull-up resistors, Figure 6 and the resistors R25, R26, R29, and R31 shown are pull-down resistors. The circuit connection relationships of the respective pull-up resistors and pull-down resistors can be referred to Figure 6 shown, and details are not described here.

[0080] In some embodiments of the present application, please combine Figure 5 to understand that the first switch circuit 201 is also connected to the second power supply 50. The multi-voltage tracking device further includes a switch control circuit 70. The switch control circuit 70 is connected to the first switch circuit 201 and the controller 10 and is configured to: in response to the switch control instruction of the controller 10, select to conduct the first power supply 40 and / or the second power supply 50.

[0081] In some examples, when the controller 10 controls the first power supply 40 to output a first voltage signal and controls the second power supply 50 to output a second voltage signal, the first switch circuit 201 (such as the high-voltage relay SW1) can simultaneously disconnect and connect the two power supplies (i.e., both the first power supply 40 and the second power supply 50 to the multi-voltage tracking circuit 20).

[0082] It should be added that the first switch circuit 201 (such as the high-voltage relay SW1) is used to control the on / off of the high-voltage power supply, and its withstand voltage is relatively high, making it difficult to achieve isolation through an optocoupler (the isolation voltage of the optocoupler is relatively low). Based on this, please refer to Figure 7 , in some embodiments of the present application, the switch control circuit 70 includes: an optical fiber transmitter 71 and an optical fiber receiver 72. The optical fiber transmitter 71 is connected to the controller 10 and is configured to: generate an optical fiber transmission signal in response to a control instruction of the controller 10. The optical fiber receiver 72 is connected to the first switch circuit 201 (such as the high-voltage relay SW1) and is configured to: receive the optical fiber transmission signal and generate a switch control instruction according to the optical fiber transmission signal.

[0083] Exemplarily, as Figure 7 shown in, the optical fiber transmitter 71 includes a transmitting chip U6, a triode Q4, and resistors R36, R37, R41, and R42, and its circuit connection relationship can be referred to Figure 7 shown for implementation. The optical fiber transmitter 71 can convert an electrical signal into an optical signal for transmission.

[0084] Exemplarily, as Figure 7 shown in, the optical fiber receiver 72 includes: a receiving chip U7, resistors R35 and R39, and its circuit connection relationship can be referred to Figure 7 shown for implementation. The optical fiber receiver 72 can convert the received optical signal into an electrical signal.

[0085] On this basis, please continue to refer to Figure 7 , the switch control circuit 70 also includes, for example, a third protection circuit 73 connecting the optical fiber receiver 72 and the first switch circuit 201 (such as the high-voltage relay SW1).

[0086] Exemplarily, the third protection circuit 73 includes: a switching power transistor Q2, a triode Q3, diodes D6, D7, resistors R33, R34, R38, capacitors C31 and C32, and its circuit connection relationship can be referred to Figure 7It is carried out as shown. Among them, the switch control instruction received by the optical fiber receiver 72 can be sequentially transmitted to the first switch circuit 201 (such as the high-voltage relay SW1) via the triode Q3, the resistor R33, the resistor R34, the resistor R38, the switching power transistor Q2, and the diode D6 to control the first switch circuit 201 (such as the high-voltage relay SW1) to be disconnected or closed. The capacitors C31 and C32 can filter the switch control instruction. The diode D7 can perform overvoltage protection.

[0087] In the embodiment of the present application, it is provided that the switch control circuit 70 includes an optical fiber transmitter 71 and an optical fiber receiver 72, which can extend the signal transmission distance, improve the signal transmission speed, reduce the cost, enhance the data security, and simplify the maintenance process based on the optical fiber transceiver technology, so as to achieve long-distance and high-speed data transmission, and electrically isolate the high voltage of tens of thousands of volts from the low voltage, so as to use the low-voltage end to control the high-voltage end, thereby ensuring the operation safety and electrical anti-interference ability of the power system.

[0088] Some embodiments of the present application also provide a power system, including the multi-voltage tracking device described in any of the above embodiments. The technical advantages possessed by the foregoing multi-voltage tracking device are also possessed by this power system, and will not be elaborated herein.

[0089] Exemplarily, the power system further includes a high-voltage circuit and / or a high-precision circuit, and the voltage of the high-voltage circuit and / or the high-precision circuit can be accurately tracked by the multi-voltage tracking device to improve the accuracy, stability, and fast response ability of voltage tracking in the power system.

[0090] In the description of this specification, the description with reference to terms such as "some embodiments", "some examples", "exemplarily", etc. means that the specific features, structures, materials, or features described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0091] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0092] The above-described embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application.

Claims

1. A multi-voltage tracking device, characterized in that Comprising: A controller, connected to a first power supply and at least one second power supply, configured to: control the first power supply to output a first voltage signal, and control the second power supply to output a second voltage signal; A multi-voltage tracking circuit, including: a voltage follower circuit connected to the first power supply, an amplifier circuit connected to the voltage follower circuit, and a drive circuit connected to the amplifier circuit and the second power supply; An output circuit, connected to the drive circuit, configured to: receive and transmit an output voltage signal; Wherein, the voltage follower circuit is configured to: follow the first voltage signal to form a first follower voltage signal; The amplifier circuit is configured to: scale the first follower voltage signal to form a first scaled voltage signal; and scale a second follower voltage signal to form a second scaled voltage signal; The drive circuit is configured to: follow the output voltage signal to form the second follower voltage signal, and transmit the second follower voltage signal to the amplifier circuit; and perform a differential process on the first scaled voltage signal and the second scaled voltage signal to form a drive signal, and form the output voltage signal in response to the drive signal and the second voltage signal; the output voltage signal is equal to the first voltage signal; Wherein, the voltage follower circuit is connected to the first power supply through a first switch circuit, and is further configured to: when the first switch circuit is turned on, follow the first voltage signal to form a first follower voltage signal; The drive circuit is connected to the second power supply and the output circuit through a second switch circuit, and is further configured to: transmit the drive signal to the second switch circuit to control the conduction degree of the second switch circuit according to the drive signal, and enable the second switch circuit to provide the output voltage signal to the output circuit in response to the drive signal and the second voltage signal.

2. The multi-voltage tracking device according to claim 1, characterized in that, Further comprising: A feedback circuit, connected to the output circuit and the controller, configured to: collect the output voltage signal to form a feedback voltage signal, and transmit the feedback voltage signal to the controller; Wherein, the controller is further configured to: identify a fault in response to the feedback voltage signal; generate a shutdown control instruction in response to the fault.

3. The multi-voltage tracking device according to claim 1, characterized in that, The voltage follower circuit includes: A first operational amplifier, including a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin, and an eighth pin; Wherein, the first pin of the first operational amplifier is connected to the second pin of the first operational amplifier; The third pin of the first operational amplifier is connected to the first switch circuit, and the first switch circuit is further connected to the first power supply through a first resistor; The fourth pin of the first operational amplifier is connected to the negative terminal of the floating power supply; The fifth pin of the first operational amplifier is connected to the reference ground terminal of the floating power supply; The sixth pin of the first operational amplifier is connected to the seventh pin of the first operational amplifier; The eighth pin of the first operational amplifier is connected to the positive terminal of the floating power supply.

4. The multi-voltage tracking device according to claim 1, characterized in that, The amplifier circuit includes: The second operational amplifier includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin, and an eighth pin; Wherein, a first capacitor-resistor parallel circuit is connected in series between the first pin and the second pin of the second operational amplifier; the second pin of the second operational amplifier is also connected to a floating power supply reference ground terminal through a second capacitor-resistor parallel circuit; The third pin of the second operational amplifier is connected to the voltage follower circuit through a second resistor; The fourth pin of the second operational amplifier is connected to the negative voltage terminal of the floating power supply; The fifth pin of the second operational amplifier is connected to the drive circuit through a third resistor; A third capacitor-resistor parallel circuit is connected in series between the sixth pin and the seventh pin of the second operational amplifier; the sixth pin of the second operational amplifier is also connected to the floating power supply reference ground terminal through a fourth capacitor-resistor parallel circuit; the seventh pin of the second operational amplifier is also connected to the drive circuit through a fourth resistor; The eighth pin of the second operational amplifier is connected to the positive voltage terminal of the floating power supply.

5. The multi-voltage tracking device according to claim 1, wherein The drive circuit includes: A third operational amplifier includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin, and an eighth pin; Wherein, a fifth capacitor-resistor parallel circuit is connected in series between the first pin and the second pin of the third operational amplifier; the first pin of the third operational amplifier is also connected to the second switching circuit; the second pin of the third operational amplifier is also connected to the amplifying circuit through a fourth resistor; The third pin of the third operational amplifier is connected to the amplifying circuit through a fifth resistor; the third pin of the third operational amplifier is also connected to the floating power supply reference ground terminal through a sixth capacitor-resistor parallel circuit; The fourth pin of the third operational amplifier is connected to the negative voltage terminal of the floating power supply; The fifth pin of the third operational amplifier is connected to the second switching circuit through a sixth resistor; The sixth pin of the third operational amplifier is connected to the seventh pin of the third operational amplifier; the seventh pin of the third operational amplifier is connected to the amplifying circuit through a third resistor; The eighth pin of the third operational amplifier is connected to the positive voltage terminal of the floating power supply.

6. The multi-voltage tracking device according to claim 1, characterized in that, The second switching circuit includes: A switching power transistor includes a control terminal, a first terminal, and a second terminal; the control terminal is connected to the drive circuit through a seventh resistor; The first protection circuit includes: An overvoltage protection circuit is connected to the control terminal and the first terminal of the switching power transistor; A voltage-dividing current-limiting circuit includes an eighth resistor connected to the control terminal and the second terminal of the switching power transistor, and a ninth resistor connected to the second terminal and the second power supply.

7. The multi-voltage tracking device according to claim 6, characterized in that, The second switching circuit also includes: The second protection circuit, connected to the switching power transistor, the second power supply, the output circuit and the drive circuit, is configured to perform at least one of overvoltage protection, voltage division and current limiting, voltage stabilization protection and filtering protection on the output voltage signal.

8. The multi-voltage tracking device according to claim 1, characterized in that, Both the first power supply and the second power supply are high-voltage power supplies; The multi-voltage tracking device further includes: A first isolation chip connected between the communication interfaces of the controller and the first power supply; A second isolation chip connected between the communication interfaces of the controller and the second power supply.

9. The multi-voltage tracking device according to claim 1, wherein The first switching circuit is further connected to the second power supply; the multi-voltage tracking device further includes: A switch control circuit, connected to the first switching circuit and the controller, is configured to: in response to the switch control instruction of the controller, selectively turn on the first power supply and / or the second power supply.

10. The multi-voltage tracking device according to claim 9, characterized in that, The switch control circuit includes: An optical fiber transmitter, connected to the controller, is configured to: generate an optical fiber transmission signal in response to the control instruction of the controller; An optical fiber receiver, connected to the first switching circuit, is configured to: receive the optical fiber transmission signal and generate the switch control instruction according to the optical fiber transmission signal.

11. A power system, characterized in that, Including the multi-voltage tracking device according to any one of claims 1 to 10.

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