A voltage regulation circuit and apparatus

Abstract

The application discloses a voltage regulating circuit and device. The voltage regulating circuit comprises a rectification module, a signal generation module and an output control module. The input end of the rectification module is connected with the voltage output end of a generator, and the output end of the rectification module is connected with the first end of the excitation winding of the generator, for providing an excitation signal for the excitation winding of the generator, wherein the rectification module is a bridge rectification filter circuit. The signal generation module is connected with the voltage output end and the current output end of the generator respectively, for determining an initial control signal according to the sampling voltage and the sampling current. The output control module is connected with the signal generation module and the second end of the excitation winding of the generator respectively, for converting the initial control signal into a pulse width modulation signal and outputting the pulse width modulation signal to the second end of the excitation winding, so as to adjust the excitation voltage acting on both ends of the excitation winding. The technical scheme of the application can improve the control efficiency and effect of the starting voltage of the motor.

Description

Technical Field

[0001] The present invention relates to electric motor control technology, and more particularly to a voltage regulation circuit and device. Background Technology

[0002] During the starting process of a generator driving a motor, insufficient excitation voltage often occurs due to a large load, resulting in starting failure. A voltage regulation circuit, used in generator-driven motor systems, can control the excitation voltage during the starting process, thus enabling the motor to start successfully.

[0003] Most mainstream voltage control circuits on the market use AVR products controlled by half-wave thyristors, which have low control efficiency and poor performance. Summary of the Invention

[0004] This invention provides a voltage regulation circuit and device to improve control efficiency and effectiveness.

[0005] In a first aspect, embodiments of the present invention provide a voltage regulation circuit, comprising: a rectifier module, a signal generation module, and an output control module; the input terminal of the rectifier module is connected to the voltage output terminal of a generator, and the output terminal of the rectifier module is connected to a first terminal of the excitation winding of the generator, for providing an excitation signal to the excitation winding of the generator, wherein the rectifier module is a bridge rectifier and filter circuit; the signal generation module is connected to the voltage output terminal and the current output terminal of the generator respectively, for determining an initial control signal based on the sampled voltage and sampled current; the output control module is connected to the signal generation module and a second terminal of the excitation winding of the generator respectively, for converting the initial control signal into a pulse width modulation signal and outputting it to the second terminal of the excitation winding to adjust the excitation voltage acting on both ends of the excitation winding.

[0006] Optionally, the signal generation module includes a low-frequency detection circuit, a mixing circuit, and a processing circuit; the low-frequency detection circuit is connected to the voltage output terminal of the generator, and is used to determine the relative relationship between the frequency value of the sampled voltage and the preset frequency value, and further generate an initial control signal, a first amplitude adjustment signal; the mixing circuit is connected to the voltage output terminal, the current output terminal, and the low-frequency detection circuit of the generator, and is used to determine the amplitude value of the excitation signal based on the sampled voltage value, the sampled current value, and the first amplitude adjustment signal; the processing circuit is connected to the mixing circuit and the output control module, and is used to generate the initial control signal based on the amplitude value and the preset reference voltage.

[0007] Optionally, the voltage regulation circuit further includes an auxiliary signal interface for receiving an external auxiliary signal, wherein the external auxiliary signal includes a potential signal; the mixing circuit is also connected to the auxiliary signal interface for adjusting the amplitude value according to the external auxiliary signal.

[0008] Optionally, the voltage regulation circuit further includes: a power supply module, the input terminal of which is connected to the voltage output terminal of the generator, and the reference voltage output terminal of which is connected to the arithmetic circuit, for converting the sampled voltage into the reference voltage and providing it to the arithmetic circuit.

[0009] Optionally, the output control module includes a modulation signal unit and a switching transistor. The modulation signal unit is connected to the control terminals of the signal generation module and the switching transistor, respectively, and is used to modulate the initial control signal into the pulse width modulation signal and transmit it to the control terminal of the switching transistor. The first terminal of the switching transistor is connected to the second terminal of the excitation winding of the generator, and the second terminal of the switching transistor is grounded. The switching transistor is used to adjust the excitation signal passing through the excitation winding according to the duty cycle and amplitude of the pulse width modulation signal.

[0010] Optionally, the modulation signal unit includes a modulation circuit and an output driving circuit. The modulation circuit is connected to the signal generation module and is used to generate the pulse width modulation signal according to the initial control signal and the preset sawtooth wave. The output driving circuit is connected to the control terminal of the modulation circuit and the switching transistor respectively and is used to control the connection and disconnection of the line between the modulation circuit and the control terminal.

[0011] Optionally, the output control module further includes an overcurrent protection circuit, which is connected to the second terminal of the switching transistor and is used to determine whether an overcurrent has occurred based on the relative relationship between the current passing through the switching transistor and a preset current, and to generate an overcurrent judgment result; the output drive circuit is also connected to the current protection circuit and is used to control the output and cutoff of the control signal based on the judgment result.

[0012] Optionally, the voltage regulation circuit further includes a fourth harmonic circuit and a sawtooth wave generator. The fourth harmonic circuit is connected to the voltage output terminal of the generator and is used to generate a fourth harmonic signal based on the frequency value of the sampled voltage. The sawtooth wave generator is connected to both the fourth harmonic circuit and the modulation circuit and is used to generate a sawtooth wave signal of the same frequency from the fourth harmonic signal.

[0013] Optionally, the voltage regulation circuit further includes an AC frequency extraction circuit and a sampling signal processing circuit. The AC frequency extraction circuit is connected to the voltage output terminal of the generator, the fourth harmonic circuit, and the low-frequency detection circuit, respectively, and is used to extract the frequency value of the sampled voltage and transmit it to the low-frequency detection circuit and the fourth harmonic circuit. The sampling signal processing circuit is connected to the voltage output terminal, the current output terminal, and the mixing circuit, respectively, and is used to perform harmonic removal processing on the waveform data of the sampled voltage and the sampled current.

[0014] Secondly, embodiments of the present invention also provide a voltage regulating device, which includes the voltage regulating circuit and housing described in any of the first aspects.

[0015] The voltage regulation circuit and device provided in this embodiment are equipped with a rectifier module, a signal generation module, and an output control module. The rectifier module is a bridge rectifier and filter circuit, which can output an excitation signal of 4 pulses per cycle, which is much greater than that of traditional automatic voltage regulators. The signal generation module can generate an initial control signal based on the generator's droop current and the supply voltage. The initial control signal includes amplitude information. The output control module can generate a pulse width modulation signal based on the initial control signal. The pulse width modulation signal is used to adjust the parameters of the excitation signal in the excitation winding to achieve automatic control of the generator's excitation voltage. The rectifier module can output 4 pulses per cycle, which is much greater than the 1 pulse output during half-wave rectification in traditional automatic voltage regulators. This effectively controls the voltage drop during generator startup and improves control efficiency and effectiveness. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the voltage regulation circuit provided in an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of another voltage regulation circuit provided in an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of another voltage regulation circuit provided in an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of another voltage regulation circuit provided in an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of another voltage regulation circuit provided in an embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the structure of a voltage regulation device provided in an embodiment of the present invention;

[0022] Figure 7This is a schematic diagram of the housing panel of a voltage regulating device provided in an embodiment of the present invention. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0024] This invention provides a voltage regulation circuit. Figure 1 This is a schematic diagram of the voltage regulation circuit provided in an embodiment of the present invention, with reference to... Figure 1 The voltage regulation circuit 100 includes a rectifier module 101, a signal generation module 102, and an output control module 103. The input terminal of the rectifier module 101 is connected to the voltage output terminal 104 of the generator, and the output terminal of the rectifier module 101 is connected to the first terminal of the excitation winding 106 of the generator, for providing an excitation signal to the excitation winding 106 of the generator. The rectifier module 101 is a bridge rectifier and filter circuit. The signal generation module 102 is connected to the voltage output terminal 104 and the current output terminal 105 of the generator, respectively, for determining the initial control signal based on the sampled voltage and sampled current. The output control module 103 is connected to the signal generation module 102 and the second terminal of the excitation winding 106 of the generator, for converting the initial control signal into a pulse width modulation signal and outputting it to the second terminal of the excitation winding 106 to adjust the excitation voltage acting on both ends of the excitation winding 106.

[0025] Specifically, the rectifier module 101 is a rectifier and filter circuit for the generator, which converts the AC signal from the generator's voltage output terminal 104 into a unidirectional electrical signal, which is then used as the excitation signal for the generator's excitation winding 106. For example, the rectifier module 101 is a bridge rectifier and filter circuit, which converts the AC voltage into a full-wave rectified voltage. The excitation signal is output in four pulses per cycle, effectively controlling the voltage drop during motor startup and achieving full-wave rectification. The signal generation module 102 is an initial control signal generation circuit that can acquire the generator's supply voltage and current, and generate an initial control signal based on the sampled voltage and current. The sampled voltage can be the generator's stator voltage (i.e., the supply voltage), and the sampled current can be the generator's droop current (also known as the DROOP current). The initial control signal can control the operating state of the output control module 103 to adjust the excitation signal passing through the excitation winding 106. The output control module 103 can be an excitation signal adjustment module, which can convert the initial control signal into a pulse width modulation signal and output it to the second end of the excitation winding 106 to adjust the parameters of the excitation signal and prevent the phenomenon of starting failure caused by a large voltage drop caused by starting the motor. The parameters of the excitation signal can be parameters related to the motor starting capability, such as the amplitude of the excitation current or the amplitude of the excitation voltage.

[0026] The voltage regulation circuit provided in this embodiment includes a rectifier module, a signal generation module, and an output control module. The rectifier module is a bridge rectifier and filter circuit that can output an excitation signal with 4 pulses per cycle, which is much greater than that of traditional automatic voltage regulators. The signal generation module can generate an initial control signal based on the generator's droop current and the supply voltage. The initial control signal includes amplitude information. The output control module can generate a pulse width modulation signal based on the initial control signal. The pulse width modulation signal is used to adjust the parameters of the excitation signal in the excitation winding to achieve automatic control of the generator's excitation voltage. The rectifier module can output 4 pulses per cycle, which is much greater than the 1 pulse output during half-wave rectification in traditional automatic voltage regulators. This effectively controls the voltage drop during generator startup, improving control efficiency and effectiveness.

[0027] Figure 2 This is a schematic diagram of another voltage regulation circuit provided in an embodiment of the present invention, referred to... Figure 2Optionally, the signal generation module 102 includes a low-frequency detection circuit 201, a mixing circuit 202, and a calculation circuit 203. The low-frequency detection circuit 201 is connected to the voltage output terminal 104 of the generator and is used to determine the relative relationship between the frequency value of the sampled voltage and the preset frequency value, and further generate an initial control signal, a first amplitude adjustment signal. The mixing circuit 202 is connected to the voltage output terminal 104, the current output terminal 105, and the low-frequency detection circuit 201 of the generator, respectively, and is used to determine the amplitude value of the excitation signal based on the sampled voltage value, the sampled current value, and the first amplitude adjustment signal. The calculation circuit 203 is connected to the mixing circuit 202 and the output control module 103, respectively, and is used to generate an initial control signal based on the amplitude value and the preset reference voltage.

[0028] Specifically, low-frequency protection is designed to address potential low-frequency resonance in generators. Generator blades have natural oscillation frequencies. If the generator's operating frequency approaches or equals its natural frequency, resonance will occur, leading to material fatigue. Since material fatigue is an irreversible cumulative process, when the accumulated fatigue exceeds the material's allowable limit, the blades may break, causing serious accidents. Therefore, a preset frequency value needs to be set. When the frequency of the generator's sampled voltage is less than the preset frequency value, the amplitude of the excitation voltage is reduced based on the difference between the preset frequency value and the sampled voltage frequency value, thus achieving excitation protection for the generator. Therefore, the low-frequency detection circuit 201 is connected to the generator's voltage output terminal 104. It can collect the frequency value of the sampled voltage and compare it with the preset frequency value. If the frequency value of the sampled voltage is less than the preset frequency value, the difference between the preset frequency value and the sampled voltage frequency value is calculated. Then, a first amplitude adjustment signal is generated based on the voltage drop rate and transmitted to the hybrid circuit 202. The first amplitude adjustment signal may include the voltage drop value. The voltage drop rate is the decrease in excitation voltage when the sampled voltage frequency value is lower than the preset frequency value by one hertz, measured in V / Hz. For example, the generator's sampling voltage can be 110-260VAC, the voltage drop rate can be 12V / Hz, and the preset frequency value can be 46Hz. The hybrid circuit 202 can determine the amplitude value of the excitation signal based on the sampling voltage and the first amplitude adjustment signal. The arithmetic circuit 203 can perform comparison, differentiation, and / or integration operations based on the amplitude value and the preset reference voltage to generate an initial control signal.

[0029] The signal generation module in the voltage regulation circuit provided in this embodiment includes a low-frequency detection circuit, a hybrid circuit, and an arithmetic circuit. The low-frequency detection circuit can perform low-frequency protection judgment based on the frequency of the generator's sampled voltage. If the frequency of the sampled voltage is less than a preset frequency value, a first amplitude adjustment signal is generated. The hybrid circuit can determine the amplitude value of the excitation signal based on the first amplitude adjustment signal and the sampled voltage. The arithmetic circuit can perform comparison, differentiation, and / or integration operations based on the amplitude value and a preset reference voltage to generate an initial control signal. This realizes the generation of the initial control signal and low-frequency protection for the engine, improving the safety and reliability of the generator.

[0030] Figure 3 This is a schematic diagram of another voltage regulation circuit provided in an embodiment of the present invention, referred to... Figure 3 Optionally, the voltage regulation circuit 100 further includes an auxiliary signal interface 301 and a power supply module 302. The auxiliary signal interface 301 is used to receive external auxiliary signals, including potential signals. The mixing circuit 202 is also connected to the auxiliary signal interface 301 and is used to adjust the amplitude value according to the external auxiliary signal. The input terminal of the power supply module 302 is connected to the voltage output terminal 104 of the generator, and the reference voltage output terminal of the power supply module 302 is connected to the arithmetic circuit 203 to convert the sampled voltage into a reference voltage and provide it to the arithmetic circuit 203.

[0031] Specifically, the auxiliary signal interface 301 is an input interface for external auxiliary signals. It can connect to at least one of an external adjustable potentiometer, voltage adjustment knob, stability adjustment knob, and low-frequency protection adjustment knob. It can receive at least one of a potential signal, voltage adjustment signal, stability adjustment signal, and low-frequency protection setting signal. The hybrid circuit 202 can adjust the amplitude of the excitation signal according to the potential signal, adjust the voltage value of the generator's sampled voltage according to the voltage adjustment signal, adjust the stability of the excitation signal according to the stability adjustment signal, and modify the preset frequency value of the low-frequency protection circuit according to the low-frequency protection setting signal. The power supply module 302 can be an AC / DC conversion circuit and a reference voltage circuit. It can convert the sampled voltage to DC voltage and step it down to a preset reference voltage to provide a reference voltage for the operational circuit 203. It can also provide power at various voltage levels for various modules. The auxiliary signal interface 301 and the power supply module 302 enable the adjustment of generators with various output voltage levels, improving the adaptability of the voltage regulation circuit 100.

[0032] Figure 4 This is a schematic diagram of another voltage regulation circuit provided in an embodiment of the present invention, referred to... Figure 4Optionally, the output control module 103 includes a modulation signal unit 401 and a switching transistor Q. The modulation signal unit 401 is connected to the control terminals of the signal generation module 102 and the switching transistor Q, respectively, and is used to modulate the initial control signal into a pulse width modulation signal and transmit it to the control terminal of the switching transistor Q. The first terminal of the switching transistor Q is connected to the second terminal of the excitation winding 106 of the generator, and the second terminal of the switching transistor Q is grounded. The switching transistor Q is used to adjust the excitation signal passing through the excitation winding 106 according to the duty cycle and amplitude of the pulse width modulation signal.

[0033] Specifically, the modulation signal unit 401 includes a modulation circuit 402 and an output drive circuit 403. The modulation circuit 402 can be a pulse width modulation circuit 402, which is connected to the signal generation module 102 and is used to generate a pulse width modulation signal based on an initial control signal and a preset sawtooth wave. The output drive circuit 403 can be a control circuit, which is connected to both the modulation circuit 402 and the control terminal of the switching transistor Q, and is used to control the connection / disconnection between the modulation circuit 402 and the control terminal of the switching transistor Q, i.e., to control the start or stop output of the pulse width modulation signal.

[0034] Continue to refer to Figure 4 The output control module 103 also includes an overcurrent protection circuit 404, which is connected to the second terminal of the switching transistor Q. It is used to determine whether an overcurrent has occurred based on the relative relationship between the current passing through the switching transistor Q and the preset current, and to generate an overcurrent judgment result. The output drive circuit 403 is also connected to the current protection circuit, and is used to control the output and cutoff of the control signal based on the judgment result.

[0035] Specifically, the overcurrent protection circuit 404 may include a current sensing element, which can be positioned between the second terminal of the switching transistor Q and the ground terminal. This element can collect the current passing through the switching transistor Q and determine its relative relationship with a preset current. The overcurrent protection circuit 404 may also include a thermal fuse positioned between the second terminal of the switching transistor Q and the ground terminal. If the current through the switching transistor Q exceeds the preset current, the overcurrent protection circuit 404 determines that an overcurrent has occurred in the generator and generates an overcurrent signal output value for the drive circuit 403. The drive output circuit can control the pulse width modulation signal to stop outputting and generate a signal based on the overcurrent signal. The thermal fuse can also blow when the current through the switching transistor Q exceeds the preset current, thus achieving overcurrent protection for the generator excitation winding 106 and isolation protection for various modules and circuits in the voltage regulation circuit, further improving the safety of the voltage regulation circuit.

[0036] Figure 5 This is a schematic diagram of another voltage regulation circuit provided in an embodiment of the present invention, referred to... Figure 5Optionally, the voltage regulation circuit 100 further includes a frequency multiplier circuit 501 and a sawtooth wave generator 502. The frequency multiplier circuit 501 is connected to the voltage output terminal 104 of the generator and is used to generate a frequency multiplier signal based on the frequency value of the sampled voltage. The sawtooth wave generator 502 is connected to the frequency multiplier circuit 501 and the modulation circuit 402 respectively and is used to generate a sawtooth wave signal of the same frequency from the frequency multiplier signal.

[0037] Specifically, the fourth-harmonic generation circuit 501 can be a frequency signal generation circuit that generates a fourth-harmonic electrical signal based on the frequency of the sampled voltage. The sawtooth wave generator 502 can be a sawtooth wave generation circuit that converts the fourth-harmonic electrical signal into a sawtooth wave signal and transmits it to the modulation circuit 402, where the sawtooth wave signal serves as a preset sawtooth wave. The modulation circuit 402 can modulate the initial control signal into a pulse width modulation signal based on the preset sawtooth wave. The duty cycle of the pulse width modulation signal is related to the frequency of the preset sawtooth wave, enabling high-frequency control of the excitation winding 106, improving the control speed of the voltage regulation circuit 100, and shortening the recovery time of voltage drop during generator startup.

[0038] Continue to refer to Figure 5 Optionally, the voltage regulation circuit 100 further includes an AC frequency extraction circuit 503 and a sampling signal processing circuit 504. The AC frequency extraction circuit 503 is connected to the voltage output terminal 104 of the generator, the quadruple frequency circuit 501, and the low frequency detection circuit 201, respectively, and is used to extract the frequency value of the sampled voltage and transmit it to the low frequency detection circuit 201 and the quadruple frequency circuit 501. The sampling signal processing circuit 504 is connected to the voltage output terminal 104 of the generator, the current output terminal 105, and the mixing circuit 202, respectively, and is used to perform harmonic removal processing on the waveform data of the sampled voltage and sampled current.

[0039] Specifically, the AC frequency extraction circuit 503 may include a frequency sensing device that can acquire the frequency value of the sampled voltage. The sampling signal processing circuit 504 may be an averaging chip that can average the adjacent peaks and valleys in the higher harmonics of the sampled voltage and sampled current, thereby reducing the impact of harmonics in the sampled voltage and sampled current on the generator voltage control accuracy and improving the accuracy of voltage regulation.

[0040] This invention also provides a voltage regulation device. Figure 6 This is a schematic diagram of the structure of a voltage regulation device provided in an embodiment of the present invention. Figure 7 This is a schematic diagram of the housing panel of a voltage regulating device provided in an embodiment of the present invention. (Refer to...) Figure 6 and Figure 7 The voltage regulating device 600 includes the aforementioned arbitrary voltage regulating circuit and the housing 601.

[0041] Specifically, the housing 601 includes an external adjustable potentiometer 602, a voltage adjustment knob 603, a stability adjustment knob 604, a low-frequency protection adjustment knob 605, a low-frequency protection indicator light 606, a thermal fuse 607, an input connection port 608, and an output connection port 609. The adjustable potentiometer, voltage adjustment knob 603, stability adjustment knob 604, and low-frequency protection adjustment knob 605 can respectively input voltage signals, voltage adjustment signals, stability adjustment signals, and low-frequency protection setting signals. The low-frequency protection indicator light 606 indicates the detection result of the low-frequency detection circuit. The input connection port 608 can be connected to the generator's output terminal, and the output connection port 609 can be connected to the generator's excitation winding.

[0042] The voltage regulation circuit and device provided in this embodiment are equipped with a rectifier module, a signal generation module, and an output control module. The rectifier module is a bridge rectifier and filter circuit, which can output an excitation signal of 4 pulses per cycle, which is much greater than that of traditional automatic voltage regulators. The signal generation module can generate an initial control signal based on the generator's droop current and the supply voltage. The initial control signal includes amplitude information. The output control module can generate a pulse width modulation signal based on the initial control signal. The pulse width modulation signal is used to adjust the parameters of the excitation signal in the excitation winding to achieve automatic control of the generator's excitation voltage. The rectifier module can output 4 pulses per cycle, which is much greater than the 1 pulse output during half-wave rectification in traditional automatic voltage regulators. This effectively controls the voltage drop during generator startup and improves control efficiency and effectiveness.

[0043] The above-described products can perform the methods provided in any embodiment of the present invention, and have the corresponding functional modules and beneficial effects for performing the methods.

[0044] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A voltage regulation circuit, characterized in that, include: Rectifier module, signal generation module, output control module, low-frequency detection circuit, hybrid circuit and arithmetic circuit; The input terminal of the rectifier module is connected to the voltage output terminal of the generator, and the output terminal of the rectifier module is connected to the first terminal of the excitation winding of the generator, which is used to provide an excitation signal to the excitation winding of the generator. The rectifier module is a bridge rectifier filter circuit, and the excitation signal is a unidirectional electrical signal with 4 pulses output in each cycle. The signal generation module is connected to the voltage output terminal and the current output terminal of the generator respectively, and is used to determine the initial control signal based on the sampled voltage and sampled current. The output control module is connected to the signal generation module and the second end of the excitation winding of the generator, respectively, and is used to convert the initial control signal into a pulse width modulation signal and output it to the second end of the excitation winding to adjust the excitation voltage applied to both ends of the excitation winding. The low-frequency detection circuit is connected to the voltage output terminal of the generator and is used to determine the relative relationship between the frequency value of the sampled voltage and the preset frequency value, and further generate an initial control signal, a first amplitude adjustment signal, wherein the first amplitude adjustment signal includes a voltage drop rate, and the voltage drop rate is the decrease in excitation voltage when the frequency value of the sampled voltage is lower than the preset frequency value by one hertz. The hybrid circuit is connected to the voltage output terminal, current output terminal and low-frequency detection circuit of the generator respectively, and is used to determine the amplitude value of the excitation signal based on the sampled voltage value, the sampled current value and the first amplitude adjustment signal. The computing circuit is connected to the hybrid circuit and the output control module respectively, and is used to generate the initial control signal according to the amplitude value and the preset reference voltage.

2. The voltage regulation circuit according to claim 1, characterized in that, It also includes an auxiliary signal interface, which is used to connect to external auxiliary signals, including potential signals; The hybrid circuit is also connected to an auxiliary signal interface for adjusting the amplitude value according to the external auxiliary signal.

3. The voltage regulation circuit according to claim 1, characterized in that, Also includes: A power supply module, wherein the input terminal of the power supply module is connected to the voltage output terminal of the generator, and the reference voltage output terminal of the power supply module is connected to the arithmetic circuit, for converting the sampled voltage into the reference voltage and providing it to the arithmetic circuit.

4. The voltage regulation circuit according to claim 1, characterized in that, The output control module includes a modulation signal unit and a switching transistor. The modulation signal unit is connected to the control terminals of the signal generation module and the switching transistor, respectively, and is used to modulate the initial control signal into the pulse width modulation signal and transmit it to the control terminal of the switching transistor. The first end of the switching transistor is connected to the second end of the excitation winding of the generator, and the second end of the switching transistor is grounded. The switching transistor is used to adjust the excitation signal passing through the excitation winding according to the duty cycle and amplitude of the pulse width modulation signal.

5. The voltage regulation circuit according to claim 4, characterized in that, The modulation signal unit includes a modulation circuit and an output driving circuit. The modulation circuit is connected to the signal generation module and is used to generate the pulse width modulation signal according to the initial control signal and the preset sawtooth wave. The output drive circuit is connected to the control terminal of the modulation circuit and the switching transistor respectively, and is used to control the connection and disconnection of the line between the modulation circuit and the control terminal.

6. The voltage regulation circuit according to claim 5, characterized in that, The output control module also includes an overcurrent protection circuit, which is connected to the second terminal of the switching transistor. The overcurrent protection circuit is used to determine whether an overcurrent has occurred based on the relative relationship between the current passing through the switching transistor and the preset current, and to generate an overcurrent judgment result. The output drive circuit is also connected to the current protection circuit and is used to control the output and cutoff of the signal according to the judgment result.

7. The voltage regulation circuit according to claim 5, characterized in that, It also includes a frequency harmonic circuit and a sawtooth wave generator. The frequency harmonic circuit is connected to the voltage output terminal of the generator and is used to generate a frequency harmonic signal based on the frequency value of the sampled voltage. The sawtooth wave generator is connected to the frequency harmonic circuit and the modulation circuit respectively and is used to generate a sawtooth wave signal of the same frequency from the frequency harmonic signal.

8. The voltage regulation circuit according to claim 7, characterized in that, Also includes: An AC frequency extraction circuit and a sampling signal processing circuit are provided. The AC frequency extraction circuit is connected to the voltage output terminal of the generator, the fourth harmonic circuit, and the low-frequency detection circuit, respectively, and is used to extract the frequency value of the sampled voltage and transmit it to the low-frequency detection circuit and the fourth harmonic circuit. The sampling signal processing circuit is connected to the voltage output terminal, the current output terminal, and the mixing circuit, respectively, and is used to perform harmonic removal processing on the waveform data of the sampled voltage and the sampled current.

9. A voltage regulating device, characterized in that, Includes the voltage regulation circuit and housing as described in any one of claims 1-8.

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