Novel control system of alternating-current voltage-stabilized power supply

Abstract

The utility model discloses a novel control system for an AC voltage-stabilized power supply. The novel control system comprises a master control MCU module, a DC motor control circuit, a signal measurement circuit, a power conversion circuit, a man-machine interaction module, a communication module, a storage module and a protection module. The master control MCU module is connected with the signal measuring circuit, the man-machine interaction module, the communication module and the storage module through an SPI bus. The direct current motor control circuit adopts a full-bridge topological structure, is connected with the main control MCU module through an optical coupling isolator, and receives a PWM signal to control the positive and negative rotation and rapid braking of a motor; the power conversion circuit adopts a two-stage voltage reduction structure, the voltage of the first stage is reduced to 8V from + 12V, and the output of the second stage is 5V and 3.3 V. According to the utility model, a full-bridge topological structure and a + 12V single power supply are adopted for power supply, flexible forward rotation, reverse rotation and rapid braking control are realized, and the dynamic response capability of the system is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of a system for regulating electrical variables, and more particularly to a novel control system for an AC voltage regulator. Background Technology

[0002] Currently, in the field of AC voltage regulators, SVC (Static Var Compensator) systems are key equipment, with their core function being to achieve stable voltage output by adjusting the transformer turns ratio. Traditional control schemes often rely on a half-bridge topology to drive a DC motor, controlling the motor's direction by switching ±12V voltage, thereby changing the transformer turns ratio. While this scheme can achieve basic voltage regulation, it suffers from inherent defects such as low control precision and slow dynamic response. Especially under conditions of frequent start-stop or sudden load changes, the motor's mechanical inertia can easily lead to regulation lag, making it difficult to balance voltage regulation efficiency and equipment lifespan. With the development of industrial intelligence, users are placing higher demands on the stability, real-time performance, and remote monitoring capabilities of power supply systems, and traditional control architectures are no longer sufficient to meet the needs of complex application scenarios.

[0003] Current mainstream SVC control systems employ a half-bridge motor drive scheme, with the control loop using operational amplifiers (op-amps) to construct the signal acquisition module. This scheme requires a three-phase independent control board, with each phase equipped with an op-amp circuit for voltage and current detection. During commissioning, manual calibration of zero-point drift and temperature drift errors is necessary. Data display relies on external meters, forming a discrete "control board + instrument" architecture. Control signals are transmitted via non-isolated circuits, making them susceptible to electromagnetic interference affecting measurement accuracy. The lack of communication functionality renders the system an "information silo," hindering remote monitoring of operational status or fault warnings, severely limiting maintenance efficiency.

[0004] Therefore, it is necessary to improve a novel control system for AC voltage regulators in the existing technology to solve the above problems. Summary of the Invention

[0005] This invention overcomes the shortcomings of the prior art and provides a new control system for AC voltage stabilization power supply, aiming to solve the problems of lag in motor control response, low measurement accuracy, poor system reliability and lack of remote monitoring capability in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a novel control system for AC regulated power supplies, comprising: a main control MCU module, a DC motor control circuit, a signal measurement circuit, a power conversion circuit, a human-machine interaction module, a communication module, a storage module, and a protection module, characterized in that;

[0007] The main control MCU module is used for signal processing, logic operation and control instruction generation, and is connected to the signal measurement circuit, human-machine interaction module, communication module and storage module through SPI bus;

[0008] The DC motor control circuit adopts a full-bridge topology, consisting of four MOSFETs forming an H-bridge, along with an optocoupler and protection diodes. The DC motor control circuit is connected to the main control MCU module through the optocoupler and receives PWM signals to control the motor's forward and reverse rotation and rapid braking.

[0009] The signal measurement circuit transmits the measurement data of the three-phase input and output voltage and output current to the main control MCU module via the SPI bus;

[0010] The power conversion circuit adopts a two-stage step-down structure. The first stage step-down reduces the power supply voltage from +12V to 8V. The second stage step-down receives 8V and outputs 5V and 3.3V. The 5V is input to the main control MCU module, signal measurement circuit and human-machine interaction module; the 3.3V is input to the communication module and storage module.

[0011] The human-computer interaction module includes an LCD display screen and a button circuit, which is connected to the main control MCU module via an SPI bus for displaying real-time data and receiving user input.

[0012] The communication module is used to realize two-way data interaction between the system and the remote monitoring terminal, and is connected to the main control MCU module;

[0013] The storage module is connected to the main control MCU module via an I2C bus and is used to store calibration parameters and fault records;

[0014] The protection module includes an alarm buzzer and a protection relay. The alarm buzzer is connected to the main control MCU module, and the protection relay is connected to the main control MCU module through a control circuit.

[0015] In a preferred embodiment of this utility model, the main control MCU module adopts an STM32 series high-performance microcontroller, which has a built-in ADC analog-to-digital converter module and a PWM pulse width modulation module to drive the full-bridge motor control circuit and generate motor control signals.

[0016] In a preferred embodiment of this utility model, the DC motor control circuit is a full-bridge topology, and the forward rotation, reverse rotation and rapid braking control of the motor are realized by adjusting the conduction sequence of the MOSFETs. The power supply is directly +12V.

[0017] In a preferred embodiment of this utility model, the signal measurement circuit uses an RN7302 chip. The input side is connected to the three-phase AC input terminal through a voltage divider resistor network, and the output side acquires the output current signal through a Hall current sensor. The measurement data is transmitted to the main control MCU module through the SPI bus.

[0018] In a preferred embodiment of this utility model, in the power conversion circuit, the first-stage step-down uses LM7808 as a pre-stage regulator to protect the second-stage step-down AS1117. LM7808 reduces 12V to 8V, and AS1117 converts 8V to 5V and 3.3V, ensuring power stability and reducing heat generation.

[0019] In a preferred embodiment of this utility model, the LCD display screen uses a TM1621 display driver chip, receives data via the SPI bus and displays real-time voltage, current, system status and parameter setting interface, and is equipped with button circuits S1 to S4 for user interaction.

[0020] In a preferred embodiment of this utility model, the communication circuit adopts an RS485 interface, uses a MAX485 chip to construct a differential bus interface, integrates optocoupler isolation and TVS protection circuits, and configures terminating resistors at both ends of the bus.

[0021] In a preferred embodiment of this utility model, the storage module uses an EEPROM chip and an I2C bus interface. The stored content includes voltage threshold, calibration coefficient, historical fault timestamps, and type codes.

[0022] In a preferred embodiment of this utility model, the control circuit of the protection relay adopts a dual redundant relay structure and is equipped with a 10A load disconnection capability.

[0023] In a preferred embodiment of this utility model, the system adopts a design that separates control ground and power ground, and achieves electrical isolation between the main control MCU and the motor drive circuit through an optocoupler isolator.

[0024] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0025] (1) This utility model combines a full-bridge motor drive circuit (an H-bridge topology composed of Q20, Q19, Q25, and Q27) with an optocoupler LTV-357. The PWM control signal output by the main control MCU drives the MOSFETs after opto-isolation by the LTV-357. The forward rotation, reverse rotation, and braking of the motor are achieved by adjusting the conduction sequence of the four transistors. This combination physically isolates the control signal from the power ground, suppressing common-mode interference generated during motor start-up and shutdown. At the same time, it utilizes the symmetrical conduction characteristics of the full-bridge topology to shorten the motor commutation response time. Compared with the prior art, it further shortens the braking time under voltage change conditions, avoids over-adjustment oscillation caused by mechanical inertia, and significantly improves the dynamic stability of the system.

[0026] (2) This invention uses the RN7302 chip for high-precision measurement of three-phase input voltage, output voltage, and current, and combines it with the SPI bus to transmit the measurement data to the main control MCU in real time, directly replacing the traditional operational amplifier measurement circuit and its numerous peripheral components. The high precision, high speed, and visual data processing capabilities of the RN7302 chip significantly improve the accuracy and stability of the measurement, while avoiding the offset problem caused by temperature changes. Compared with the prior art, it further achieves long-term stable operation and high-precision data acquisition.

[0027] (3) This utility model breaks through the traditional architecture of three-phase systems requiring multiple control boards. This application realizes single-board control through modular integrated design; the optocoupler isolator (LTV-357) constructs dual isolation between control ground and power ground, which increases the electromagnetic interference suppression capability. Combined with the protection diode array, the failure rate of MOSFET is greatly reduced.

[0028] (4) This utility model converts the +12V main power supply to 5V and 3.3V through a dual-stage step-down power supply circuit (LM7808+AS1117), directly solving the overheating problem of traditional linear regulators under high input voltage drop. The LM7808 reduces the input voltage drop of AS1117, ensuring that the chip will not overheat when the output current is too large, while providing a stable power supply for the MCU, RN7302 and peripheral circuits. Compared with the prior art, this further improves the power supply stability and reliability of the system. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0030] Figure 1 This is a circuit diagram of the main control MCU of a preferred embodiment of the present invention;

[0031] Figure 2 This is a preferred embodiment of the DC motor control circuit diagram of this utility model;

[0032] Figure 3 This is a signal measurement circuit diagram of a preferred embodiment of the present invention;

[0033] Figure 4 This is a circuit diagram of a preferred embodiment of the two-stage step-down power supply of this utility model;

[0034] Figure 5 This is a circuit diagram of the system display screen of a preferred embodiment of the present invention;

[0035] Figure 6 This is a circuit diagram of a display signal amplification circuit according to a preferred embodiment of the present invention;

[0036] Figure 7This is a preferred embodiment of the RS485 communication circuit diagram of this utility model;

[0037] Figure 8 This is a circuit diagram of the storage module of a preferred embodiment of the present invention;

[0038] Figure 9 This is a circuit diagram of an alarm buzzer according to a preferred embodiment of the present invention;

[0039] Figure 10 This is a control circuit diagram of a protective relay according to a preferred embodiment of the present invention. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0041] Application Overview:

[0042] Existing technology uses operational amplifiers to obtain control signals, which is complex to debug and has poor stability. Data display requires the addition of an electricity meter, and three control boards must be used for three-phase systems.

[0043] Existing AC voltage stabilization power supply control systems suffer from three major drawbacks: 1. Due to the inherent delay of motor mechanical commutation, phase control has errors, which can easily lead to over-adjustment and oscillation, especially during voltage surges; 2. Traditional operational amplifier measurement circuits require matching with a large number of external components, and temperature changes can introduce offsets, resulting in a decrease in long-term stability; 3. Three-phase systems require three independent control boards, and multi-board collaborative control increases the number of fault points, with system reliability decreasing exponentially with the number of boards.

[0044] Therefore, this application proposes a novel control system for AC regulated power supplies to address the aforementioned deficiencies. This application adopts full-bridge control and directly uses +12V voltage for power supply, significantly improving the flexibility of forward rotation, reversal, and braking. It uses the RN7302 chip to realize the measurement of three-phase input voltage, output voltage, and current, which has high precision, high speed, and visualization data processing capabilities compared with traditional operational amplifier measurement circuits. The system integrates an RS485 communication circuit, which can remotely transmit voltage, current, and system status data, facilitating remote monitoring and management.

[0045] Exemplary device:

[0046] A novel control system for an AC regulated power supply includes: a main control MCU module, a DC motor control circuit, a signal measurement circuit, a power conversion circuit, a human-machine interaction module, a communication module, a storage module, and a protection module;

[0047] like Figure 1As shown, the main control MCU module adopts a high-performance microcontroller, specifically an STM32 series high-performance MCU, with a built-in ADC analog-to-digital converter module and PWM pulse width modulation module, used to drive the full-bridge motor control circuit; the main control MCU module is the core of the system, responsible for signal processing, logic operation and control command generation; it receives voltage / current data from the signal measurement circuit, generates motor control signals through algorithms, and coordinates the operation of the display screen, communication module and alarm system.

[0048] like Figure 2 As shown, the DC motor control circuit drives the DC motor and adjusts the transformer turns ratio to achieve stable voltage output. It adopts a full-bridge topology and supports forward rotation, reversal, and rapid braking. The DC motor control circuit consists of four MOSFETs (Q20, Q19, Q25, and Q27) forming an H-bridge topology. It controls the motor's direction and speed through PWM signals, and is equipped with an optocoupler isolator and protection diodes. Figure 2 In the diagram, D18 and D27 are indicator lights;

[0049] The optocoupler uses an LTV-357 optocoupler to isolate the main control MCU from the motor drive circuit, preventing the motor ground signal from interfering with the control signal; the four protection diodes are D21, D22, D24, and D25 in the figure, which are used to suppress the reverse electromotive force during motor commutation and protect the MOSFET; the optocoupler isolation circuit completely isolates the control signal from the power ground, suppressing electromagnetic interference generated by motor start-up and shutdown.

[0050] The DC motor control circuit is powered directly by a +12V power supply, which reduces the complexity of the ±12V dual power supply required by the traditional half-bridge drive. The PWM signal output by the MCU drives the MOSFET after being isolated by an optocoupler. The forward rotation, reverse rotation and braking control of the motor are achieved by adjusting the conduction sequence of the four MOSFETs Q20, Q19, Q25 and Q27.

[0051] like Figure 3 As shown, the signal measurement circuit is used for high-precision measurement of three-phase input voltage, output voltage, and output current, supporting half-wave RMS value calculation and frequency detection. Specifically, it uses the RN7302 chip. The input side is directly connected to the three-phase AC input terminals through a voltage divider resistor network, and a filter capacitor is configured to eliminate high-frequency noise. The output side acquires the output current signal through a Hall current sensor, and inputs it to the current detection channel of the RN7302 through a differential amplifier. The measurement data is transmitted to the main control MCU through the SPI bus to realize real-time data interaction.

[0052] like Figure 4As shown, the power conversion circuit is a two-stage buck power supply circuit, converting the +12V main power supply to 5V and 3.3V to power the MCU, RN7302, and peripheral circuits. The first stage of bucking is achieved by using a U15 LM7808 linear regulator to reduce the 12V to 8V, thus reducing the input voltage drop of subsequent chips. The second stage of bucking is achieved by using an AS1117 low-dropout regulator to convert the 8V to 5V and 3.3V, ensuring power stability and reducing heat generation. The U15 LM7808 is mainly for protecting the AS1117. When the input voltage of the AS1117 is 12V, if the output current is too large, the large voltage drop will cause the AS1117 to overheat. The LM7808 is used to reduce the input voltage of the AS1117, thereby ensuring that the chip does not overheat when the output current is too large.

[0053] The human-computer interaction module includes an LCD display and button circuitry, which are connected to the main control MCU module via an SPI bus to display real-time data and receive user input.

[0054] like Figure 5 As shown, the system display circuit is used to display real-time voltage, current, system status, and parameter setting interface; the display LCD is a liquid crystal display, the display driver is TM1621, which controls the LCD segment code and backlight; S1~S4 are button circuits; BLED backlight; Q1, Q2, Q3 are display driver signal amplification circuits to enhance the SPI signal driving capability and support ribbon cable connection up to 10 meters; P1~P2 are ribbon cable interfaces for connecting to the motherboard;

[0055] like Figure 6 As shown, the display signal amplification circuit can increase the current of the output signal while keeping the MCU's 5V voltage constant, thereby achieving distortion-free SPI signal information over long distances; and allowing the system display screen cable to be further extended, up to tens of meters in length.

[0056] like Figure 7 As shown, the communication module is used to realize bidirectional data interaction between the system and the host computer or remote monitoring terminal; a differential bus interface is constructed using the MAX485 chip, and optical isolation is used to ensure communication anti-interference capability; the RS485 interface is connected to the remote monitoring terminal through twisted pair cable, supporting Modbus protocol to transmit voltage, current and alarm status data; the protection circuit consists of TVS diodes and a resistor network to prevent bus overvoltage or electrostatic damage; terminating resistors are configured at both ends of the bus.

[0057] like Figure 8 As shown, the storage module uses an EEPROM chip, which employs an I2C bus interface. The stored content includes voltage thresholds, calibration coefficients, historical fault timestamps, and type codes, ensuring that data is not lost after a power outage.

[0058] The protection module includes an alarm buzzer and a protection relay. The alarm buzzer is connected to the main control MCU module, and the protection relay is connected to the main control MCU module through a control circuit.

[0059] like Figure 9 As shown, the alarm buzzer triggers an audible and visual alarm when there is overvoltage, undervoltage, or overtemperature to remind maintenance personnel to perform maintenance; when an abnormality is detected, the MCU triggers the buzzer to sound and displays the fault type on the LCD.

[0060] like Figure 10 As shown, the control circuit of the protective relay is controlled by the MCU to cut off the main circuit when a serious fault is detected, including short circuit or overload, and it supports a maximum load of 10A.

[0061] The external AC power supply of this application is rectified and filtered to output +12V DC, which is then input to a two-stage step-down circuit and converted into 5V and 3.3V to power each module.

[0062] The LM7808 reduces the 12V to 8V to supply the AS1117; the AS1117 outputs 5V to supply the MCU, display, and RN7302; the AS1117 outputs 3.3V to supply the communication module; the system is divided into control ground and power ground, which are isolated by optocouplers.

[0063] For signal acquisition, the three-phase input voltage and output voltage are connected to the voltage channel of RN7302 via a voltage divider resistor network; the output current is converted into a voltage signal by a Hall sensor and input to the current channel of RN7302; RN7302 transmits the measurement data to the main control MCU via the SPI bus.

[0064] The MCU calculates the PWM duty cycle based on the deviation between the set value and the real-time measured value, and drives the full-bridge MOSFET through an optocoupler isolation circuit. After the turns ratio of the motor drive transformer is adjusted, the new voltage value is collected again by RN7302 to form a closed-loop control. Compared with the traditional half-bridge drive, the full-bridge topology can provide more flexible motor control capabilities. When there is a sudden voltage change, the full-bridge drive can achieve rapid motor braking by simultaneously turning on Q20, Q19, Q25, and Q27, avoiding overshoot caused by mechanical inertia.

[0065] The MCU sends data to the TM1621 driver chip via the SPI bus to drive the LCD display; the MCU encapsulates the data into Modbus protocol frames and sends them to the monitoring center via the RS485 interface.

[0066] In practical applications, the novel AC regulated power supply control system, through modular design and closed-loop control logic, achieves high-precision voltage regulation, rapid dynamic response, and intelligent management. During system operation, the external AC power supply, after rectification and filtering, outputs +12V DC, which is then input to a two-stage step-down circuit (LM7808+AS1117) to be converted to 5V and 3.3V. This power supplies the MCU, RN7302 metering chip, display screen, and communication module, ensuring stable operation of each functional unit. Specifically, the input voltage for the main control MCU module, signal measurement circuit, and human-machine interface module is 5V; the input voltage for the communication module and storage module is 3.3V; and the input voltage for the protection relay control circuit, alarm buzzer, and DC motor control circuit is 12V.

[0067] The main control MCU (such as the STM32 series) acts as the core controller, receiving real-time three-phase input voltage, output voltage, and current data from the RN7302. It calculates the deviation value using a built-in algorithm, generating a PWM control signal to drive the full-bridge motor circuit (an H-bridge topology composed of Q20, Q19, Q25, and Q27), adjusting the DC motor's direction and speed, and dynamically adjusting the transformer turns ratio to stabilize the output voltage. The synergistic effect of the optocoupler isolator (LTV-357) and protection diodes (D21, D22, D24, D25) effectively isolates motor ground noise and suppresses back electromotive force, ensuring the purity of the control signal and the safety of the MOSFETs.

[0068] In actual operation, users can set voltage thresholds, alarm parameters, and communication addresses via S1-S4 buttons. The LCD display (TM1621 driver) shows the operating status, measurement data, and fault codes in real time. The signal amplification circuit (Q1-Q3) supports cable connections up to 10 meters long, meeting the flexible deployment needs of industrial sites. When the system detects overvoltage, undervoltage, overtemperature, or short circuit, the MCU immediately triggers a buzzer alarm and cuts off the main circuit via a relay control circuit. Simultaneously, the fault information is stored in the EEPROM chip for subsequent maintenance and analysis. The RS485 communication module (MAX485 chip) uses the Modbus protocol to interact with the host computer, enabling remote monitoring of voltage waveforms, load status, and historical data, significantly improving operational efficiency. Compared to traditional solutions, this system replaces multiple discrete control boards with a single-board integrated design. By combining a full-bridge driver with RN7302 high-speed sampling, the output voltage stabilization time can be shortened under large input fluctuations, and anti-interference capabilities are improved. It is suitable for scenarios with stringent power quality requirements, such as data centers, medical equipment, and precision manufacturing, offering significant reliability advantages and economic benefits.

[0069] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A novel control system for an AC voltage regulator, comprising: The system includes a main control MCU module, a DC motor control circuit, a signal measurement circuit, a power conversion circuit, a human-machine interface module, a communication module, a storage module, and a protection module. Its characteristics are: The main control MCU module is used for signal processing, logic operation and control instruction generation, and is connected to the signal measurement circuit, human-machine interaction module, communication module and storage module through SPI bus; The DC motor control circuit adopts a full-bridge topology, consisting of four MOSFETs forming an H-bridge, along with an optocoupler and protection diodes. The DC motor control circuit is connected to the main control MCU module through the optocoupler and receives PWM signals to control the motor's forward and reverse rotation and rapid braking. The signal measurement circuit transmits the measurement data of the three-phase input and output voltage and output current to the main control MCU module via the SPI bus; The power conversion circuit adopts a two-stage step-down structure. The first stage step-down reduces the power supply voltage from +12V to 8V, and the second stage step-down receives 8V and outputs 5V and 3.3V. The 5V is input to the main control MCU module, signal measurement circuit and human-machine interaction module. 3.3V is input to the communication module and the storage module; The human-computer interaction module includes an LCD display screen and a button circuit, which is connected to the main control MCU module via an SPI bus for displaying real-time data and receiving user input. The communication module is used to realize two-way data interaction between the system and the remote monitoring terminal, and is connected to the main control MCU module; The storage module is connected to the main control MCU module via an I2C bus and is used to store calibration parameters and fault records; The protection module includes an alarm buzzer and a protection relay. The alarm buzzer is connected to the main control MCU module, and the protection relay is connected to the main control MCU module through a control circuit.

2. The novel control system for an AC voltage regulator according to claim 1, characterized in that: The main control MCU module uses an STM32 series high-performance microcontroller, with a built-in ADC analog-to-digital converter module and PWM pulse width modulation module, which is used to drive the full-bridge motor control circuit and generate motor control signals.

3. The novel control system for an AC voltage regulator according to claim 1, characterized in that: The DC motor control circuit is a full-bridge topology. It controls the motor's forward rotation, reverse rotation, and rapid braking by adjusting the MOSFET's on-time. The power supply is directly +12V.

4. The novel control system for an AC voltage regulator according to claim 1, characterized in that: The signal measurement circuit uses the RN7302 chip. The input side is connected to the three-phase AC input terminal through a voltage divider resistor network. The output side acquires the output current signal through a Hall current sensor and transmits the measurement data to the main control MCU module through the SPI bus.

5. A novel control system for an AC voltage regulator according to claim 1, characterized in that: In the power conversion circuit, the first-stage step-down uses LM7808 as a pre-stage regulator to protect the second-stage step-down AS1117. LM7808 reduces 12V to 8V, and AS1117 converts 8V to 5V and 3.3V, ensuring power stability and reducing heat generation.

6. A novel control system for an AC voltage regulator according to claim 1, characterized in that: The LCD display screen uses the TM1621 display driver chip, receives data via the SPI bus and displays real-time voltage, current, system status and parameter setting interface, and is equipped with button circuits S1~S4 for user interaction.

7. A novel control system for an AC voltage regulator according to claim 1, characterized in that: The communication module uses an RS485 interface, employs a MAX485 chip to construct a differential bus interface, integrates optocoupler isolation and TVS protection circuits, and configures terminating resistors at both ends of the bus.

8. A novel control system for an AC voltage regulator according to claim 1, characterized in that: The storage module uses an EEPROM chip and an I2C bus interface. The stored content includes voltage threshold, calibration coefficient, historical fault timestamps, and type codes.

9. A novel control system for an AC voltage regulator according to claim 1, characterized in that: The control circuit of the protection relay adopts a dual redundant relay structure and is equipped with a 10A load disconnection capacity.

10. A novel control system for an AC voltage regulator according to claim 1, characterized in that: The system adopts a design that separates control ground and power ground, and uses an optocoupler to achieve electrical isolation between the main control MCU and the motor drive circuit.

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