A synchronous superimposed ac-dc high voltage power supply

Abstract

The application provides a synchronous superimposed AC-DC high-voltage power supply, comprising: an AC-DC unit for converting an external power supply voltage into a direct current voltage; a low-voltage inverter unit for inverting the direct current voltage into a high-frequency alternating current voltage; a high-frequency transformer for outputting the high-frequency alternating current voltage after voltage boosting, comprising a primary and a plurality of secondaries, the primary being connected with the low-voltage inverter unit; a plurality of synchronous voltage regulation units, each of which is connected with one of the secondaries of the high-frequency transformer, and the output ends of all the synchronous voltage regulation units are connected in series to output a direct current high voltage or an alternating current high voltage required by a user; each of the synchronous voltage regulation units comprises a signal receiver; a main control unit receives a voltage parameter input by the user, and wirelessly sends the voltage parameter and a synchronization signal to each of the synchronous voltage regulation units through a signal transmitter, so that each of the synchronous voltage regulation units outputs a synchronized voltage according to the voltage parameter input by the user. The application can output both a direct current high voltage and an alternating current high voltage, and has a small size.

Description

Technical Field

[0001] This invention belongs to the field of high-voltage power supply technology, specifically relating to a synchronous superimposed AC / DC high-voltage power supply. Background Technology

[0002] High-voltage power supplies are devices capable of generating high-voltage outputs and are widely used in fields such as power equipment testing, electrostatic dust removal, and scientific research. Various output types of high-voltage power supplies are required when performing high-voltage tests on power equipment, such as DC withstand voltage, AC withstand voltage, dielectric loss, and partial discharge tests. For example, dielectric loss testing requires a high-voltage power supply to generate AC high voltage with a frequency close to or above the mains frequency (50 or 60 Hz) and an amplitude of 10 kV or higher; AC withstand voltage testing requires a high-voltage power supply to generate AC high voltage close to the mains frequency or at an ultra-low frequency of 0.1 Hz; and DC withstand voltage testing or insulation resistance measurement requires a high-voltage power supply to generate DC high voltage.

[0003] When applying high AC voltage to test objects such as large generators and cables, the large equivalent capacitance necessitates a large output current from the high-voltage power supply. Using a conventional power frequency transformer to directly step up the voltage results in an excessively large and heavy power supply. To reduce the size and weight of AC high-voltage power supplies, series resonance technology or ultra-low frequency testing technology is generally employed. Series resonance technology reduces the output voltage of the step-up transformer by creating resonance between the reactor connected in series with the test object and the test object's capacitance, thus reducing the overall size and weight of the power supply. However, series resonance test equipment still uses a power frequency transformer and adds an additional reactor, both operating at relatively low frequencies (around 50Hz), thus the entire device remains large and bulky. Ultra-low frequency testing utilizes the principle that the current flowing through a capacitor is proportional to the frequency. By reducing the test frequency to 0.1Hz, the required test current is significantly reduced, resulting in a much lower output power requirement and a reduced size and weight of the test power supply. However, the frequency of ultra-low frequency testing differs too much from the operating frequency of the test object, thus failing to accurately reflect the health status of the test object under actual operating conditions; frequency equivalence requires further research. If a high-voltage power supply that can output both DC and AC high voltages, and is small in size and light in weight could be provided, it would greatly facilitate various high-voltage tests. Summary of the Invention

[0004] In view of the above-mentioned defects or improvement needs of the existing technology, the present invention proposes a synchronous superimposed AC / DC high voltage power supply, which can output both DC high voltage and AC high voltage, and is small in size.

[0005] To achieve the above objectives, according to one aspect of the present invention, a synchronous superimposed AC / DC high-voltage power supply is provided, comprising:

[0006] The AC-DC unit is connected to an external power supply and is used to convert the external power supply voltage into DC voltage.

[0007] The low-voltage inverter unit, connected to the AC-DC unit, is used to invert DC voltage into high-frequency AC voltage.

[0008] A high-frequency transformer is used to step up high-frequency AC voltage for output. It includes a primary winding and several secondary windings. The primary winding is connected to a low-voltage inverter unit.

[0009] Several synchronous voltage regulating units are provided, each of which is connected to one secondary winding of a high-frequency transformer. The outputs of all synchronous voltage regulating units are connected in series to output the DC high voltage or AC high voltage required by the user. Each synchronous voltage regulating unit includes a signal receiver for receiving serial data and synchronization signals.

[0010] The main control unit receives voltage parameters input by the user and wirelessly transmits serial data representing the voltage parameters and synchronization signals to the signal receivers of each synchronous voltage regulating unit via a signal transmitter, so that each synchronous voltage regulating unit outputs a synchronized voltage according to the voltage parameters input by the user.

[0011] According to the above scheme, the signal transmitter and signal receiver are in two sets, used to transmit synchronization signals and voltage parameters respectively; or

[0012] The signal transmitter and signal receiver are a set used for time-division transmission of voltage parameters and synchronization signals.

[0013] According to the above scheme, the synchronous signal transceiver includes an infrared light transmitter and an infrared light receiver, wherein the infrared light transmitter is connected to the main control unit and the infrared light receiver is connected to the synchronous voltage regulating power supply.

[0014] The structure of a serial data transceiver is the same as that of a synchronous signal transceiver.

[0015] According to the above scheme, each synchronous voltage regulating unit has the same structure, including:

[0016] A high-frequency rectifier circuit is connected to one of the secondary windings of a high-frequency transformer;

[0017] The energy storage capacitor is connected in parallel with the output terminal of the high-frequency rectifier circuit.

[0018] The high-voltage inverter module has its input terminal connected to the output terminal of the high-frequency rectifier circuit, and its output terminal connected in series with the output terminal of the high-voltage inverter module of other synchronous voltage regulation units.

[0019] The intelligent PWM controller is used to calculate the required PWM signal in real time based on the received voltage parameters, synchronization signal and voltage across the energy storage capacitor and output it to the high-voltage inverter module.

[0020] The auxiliary power supply provides the low-voltage DC voltage required for the synchronous voltage regulation unit to operate. It is powered by the auxiliary secondary winding of the high-frequency transformer or by the energy storage capacitor.

[0021] According to the above scheme, the high-voltage inverter module includes interconnected switching full-bridge inverters and filter circuits; wherein...

[0022] The switching full-bridge inverter includes four high-voltage electronic switches, each of which is connected to a gate drive circuit, which is controlled and driven by an intelligent PWM controller.

[0023] According to the above scheme, the intelligent PWM controller is the MCU and its peripheral circuits.

[0024] According to the above scheme, voltage parameters include voltage waveform, amplitude, and frequency.

[0025] According to the above scheme, there is one high-frequency transformer, which has one primary and several secondary windings, with each secondary winding corresponding to a synchronous voltage regulating unit.

[0026] According to the above scheme, there is one high-frequency transformer, and the high-frequency transformer has one primary, several primary and secondary windings and several auxiliary secondary windings;

[0027] Each primary and secondary winding corresponds to a high-frequency rectifier circuit of a synchronous voltage regulation unit, and each auxiliary secondary winding provides energy to the auxiliary power supply of a synchronous voltage regulation unit.

[0028] According to the above scheme, the high-frequency transformer consists of several primary high-frequency transformers connected in parallel, and each high-frequency transformer corresponds to a synchronous voltage regulating unit.

[0029] Each high-frequency transformer has a primary secondary and an auxiliary secondary. The primary and secondary are connected to the high-frequency rectifier circuit of the synchronous voltage regulating unit, and the auxiliary secondary provides energy to the auxiliary power supply.

[0030] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects:

[0031] 1. By employing a synchronous voltage regulator unit in conjunction with a main control unit, the synchronous voltage regulator unit has a signal receiver, and the main control unit has a signal transmitter. The main control unit wirelessly transmits the user-input voltage parameters and synchronization signals to the synchronous voltage regulator units, ensuring that each synchronous voltage regulator unit outputs voltage waveforms that are identical and synchronized (with the same amplitude and phase in AC output). The outputs of all synchronous voltage regulator units are then connected in series to obtain the voltage waveform required by the user. This method ensures both isolation safety and improves the reliability of voltage parameter and synchronization signal transmission. Because the low-frequency transformer is eliminated and a high-frequency transformer is used, the size and weight of the high-voltage power supply using this invention are significantly reduced. Therefore, this invention can output both DC high voltage and reliable AC high voltage, and is compact in size.

[0032] 2. By using an infrared light transmitter and an infrared light receiver for signal transmission between the main control unit and the synchronous voltage regulation unit, the synchronization signal and voltage parameters can be sent to the synchronous voltage regulation unit accurately and quickly, further ensuring real-time performance and accuracy.

[0033] 3. The design of the energy storage capacitor in the synchronous voltage regulation unit can be used in conjunction with the high-voltage inverter module with bidirectional energy flow. During the high-voltage test, when the test object is an energy storage type (such as a capacitor or inductor), the high-voltage inverter module will reverse the energy released by the test object to the energy storage capacitor for temporary storage during the energy release phase. During the energy rise phase of the test object, the high-voltage inverter module will transfer part of the energy in the energy storage capacitor to the test object, so that the energy of the test object is not wasted, thereby improving the overall efficiency and reducing the power requirements of the external power supply.

[0034] 4. By connecting multiple synchronous voltage regulating units in series to output high voltage, the target output high voltage can be obtained by connecting several synchronous voltage regulating units in series. Each synchronous voltage regulating unit only needs to output about 1kV, thereby reducing the voltage withstand requirements of semiconductor switches, which are easy to obtain and inexpensive. Attached Figure Description

[0035] Figure 1 The overall schematic diagram provided for embodiments of the present invention.

[0036] Figure 2 This is a schematic diagram of the synchronous voltage regulation unit provided in an embodiment of the present invention.

[0037] Figure 3 A simplified diagram illustrating the implementation principle of a low-voltage inverter unit provided in an embodiment of the present invention.

[0038] Figure 4 for Figure 2 Detailed diagram. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0040] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] According to one aspect of the present invention, this embodiment provides a synchronous superimposed AC / DC high-voltage power supply, such as... Figure 1 As shown, it includes:

[0042] An AC-DC unit, connected to an external power supply, converts the external supply voltage into DC voltage. The AC-DC unit includes a rectifier-filter circuit and a pre-regulator circuit, resulting in smaller fluctuations in the rectified DC voltage. Preferably, the AC-DC unit is a PFC (Power Factor Correction) circuit.

[0043] The low-voltage inverter unit, connected to the AC-DC unit, is used to invert DC voltage into high-frequency AC voltage.

[0044] A high-frequency transformer is used to step up high-frequency AC voltage for output. It consists of a primary winding and several secondary windings, with the primary winding connected to a low-voltage inverter unit. Because several secondary windings are required, a high-frequency transformer can be a large transformer with one primary and several secondary windings; or it can be several small high-frequency transformers, each with one primary and one or more secondary windings, with the primary windings of each small transformer connected in parallel. By eliminating the low-frequency transformer and using a high-frequency transformer, the size and weight of the high-voltage power supply are significantly reduced.

[0045] Several synchronous voltage regulating units are configured, each connected to a secondary winding of a high-frequency transformer. The outputs of all synchronous voltage regulating units are connected in series to output the required DC or AC high voltage. The voltage waveforms output by each synchronous voltage regulating unit are identical and synchronized; synchronization means that the AC outputs have the same amplitude and phase. The final output after series connection is the sum of the voltages output by each synchronous voltage regulating unit. Each synchronous voltage regulating unit includes a signal receiver for receiving serial data and synchronization signals.

[0046] The main control unit receives voltage parameters input by the user and wirelessly transmits serial data representing these voltage parameters and synchronization signals to the signal receivers of each synchronous voltage regulator unit via a signal transmitter. This enables each synchronous voltage regulator unit to output a synchronized voltage according to the user-input voltage parameters. The voltage parameters include output voltage parameters such as waveform, amplitude, and frequency.

[0047] In some embodiments, the signal transmitter and signal receiver are two sets, used to transmit synchronization signals and voltage parameters respectively.

[0048] Alternatively, the signal transmitter and receiver can be a pair for time-division multiplexing of voltage parameters and synchronization signals. Specifically, when the power supply is first powered on, the required voltage parameters are input, at which point the signal transmitter only transmits the voltage parameters to the signal receiver. Then, during actual use, only the synchronization signal needs to be transmitted. After power-off, the input record is cleared, without affecting subsequent use. This method achieves time-division multiplexing of voltage parameters.

[0049] Furthermore, the signal transmitter is an infrared light transmitter, and the corresponding signal receiver is an infrared light receiver. The infrared light transmitter is located on the main control unit side, and the infrared light receiver is located on the synchronous voltage regulation unit side. There are various wireless transmission methods. Research has shown that using an infrared light transmitter and infrared light receiver can ensure both high-voltage isolation requirements and error-free signal transmission.

[0050] Each synchronous voltage regulation unit has the same structure. In some embodiments, a synchronous voltage regulation unit includes a high-frequency rectifier circuit, an energy storage capacitor, a high-voltage inverter module, an intelligent PWM controller, and an auxiliary power supply. For example... Figure 2 and Figure 4 As shown, the high-frequency rectifier circuit of a synchronous voltage regulation unit is connected to one secondary winding of a high-frequency transformer; the energy storage capacitor is connected in parallel with the output of the high-frequency rectifier circuit; the input of the high-voltage inverter module is connected to the output of the high-frequency rectifier circuit, and its output is connected in series with the output of the high-voltage inverter module of other synchronous voltage regulation units; the intelligent PWM controller is used to calculate the required PWM signal in real time based on the received voltage parameters, synchronization signal, and voltage across the energy storage capacitor, and output it to the high-voltage inverter module.

[0051] The synchronous voltage regulation unit also includes an auxiliary power supply to provide the low-voltage DC voltage required for the synchronous voltage regulation unit to operate. The power is provided by the auxiliary secondary of the high-frequency transformer (which has fewer turns compared to the primary and secondary) or by energy storage capacitors, such as 3.3V or 12V.

[0052] In some embodiments, there is one high-frequency transformer, which has a primary and several secondary windings, each secondary winding corresponding to a synchronous voltage regulating unit, i.e., connected to a high-frequency rectifier circuit. Under this condition, the auxiliary power supply for the synchronous voltage regulating unit is provided by an energy storage capacitor.

[0053] In other embodiments, there is one high-frequency transformer, which has a primary, several primary and secondary windings, and several auxiliary secondary windings. Each primary and secondary winding corresponds to the high-frequency rectifier circuit of a synchronous voltage regulation unit, and each auxiliary secondary winding provides energy to the auxiliary power supply of a synchronous voltage regulation unit.

[0054] In other embodiments, the high-frequency transformer consists of several primary high-frequency transformers connected in parallel, with each high-frequency transformer corresponding to a synchronous voltage regulating unit. Each high-frequency transformer has a primary secondary and an auxiliary secondary, wherein the primary and secondary are connected to the high-frequency rectifier circuit of the synchronous voltage regulating unit, and the auxiliary secondary provides energy to the auxiliary power supply.

[0055] Furthermore, the high-voltage inverter module includes interconnected switching full-bridge inverters and filter circuits; wherein, the switching full-bridge inverter includes 4 high-voltage electronic switches (MOSFETs or IGBTs), each of which is connected to a gate drive circuit, and the gate drive circuit is controlled and driven by an intelligent PWM controller.

[0056] In some embodiments, the intelligent PWM controller is an MCU and its peripheral circuitry. MCU stands for Microcontroller, also known as a single-chip microcomputer.

[0057] The following example demonstrates how to achieve an input of AC220V and a maximum output voltage amplitude of 15kV.

[0058] Continue as Figure 1 As shown, the synchronous superimposed AC / DC high voltage power supply mainly consists of the following parts: AC-DC unit, low voltage inverter unit, high frequency transformer, 15 synchronous voltage regulation units, and main control unit.

[0059] like Figure 2 As shown, the synchronous voltage regulation unit includes a high-frequency rectifier circuit, an energy storage capacitor, a high-voltage inverter module, an intelligent measurement and control module (i.e., an intelligent PWM controller), and an auxiliary power supply module. The main control unit is wirelessly connected to the synchronous voltage regulation unit through a synchronous signal transmitter and a serial data transmitter to send the voltage parameters input by the user. The AC-DC unit first rectifies and filters the external 220V AC, then converts it into a low-ripple 250V DC output to the low-voltage inverter unit via a BUCK converter.

[0060] like Figure 3As shown, the low-voltage inverter unit mainly consists of four IGBT transistors and their driving circuits. Q1 and Q4 are switched on and off synchronously, and Q2 and Q3 are switched on and off synchronously. Q1, Q4 and Q2, Q3 are switched on and off alternately at a frequency of 100kHz, thus obtaining AC square wave voltage at A and B, which is then connected to the primary of the high-frequency transformer after passing through a DC blocking capacitor.

[0061] The primary winding of the high-frequency transformer has a turns-to-turns ratio of 2. Each secondary winding of the high-frequency transformer outputs a square wave voltage with a frequency of 100kHz and an amplitude of 500V, which is then sent to the synchronous voltage regulation unit. Each synchronous voltage regulation unit doubles and rectifies the input high-frequency AC voltage before inverting it to output a low-frequency AC, DC, or AC / DC superimposed voltage waveform with an amplitude of up to 1kV. Since the output voltages of each synchronous voltage regulation unit remain synchronized, the output voltage of 15 synchronous voltage regulation units connected in series can reach 15kV.

[0062] The implementation principle of the synchronous voltage regulation unit continues as follows: Figure 4 As shown, D1 and D2 are rectifier diodes, and C1 and C2 are energy storage capacitors, forming a voltage doubler rectifier circuit with D1 and D2. The high-frequency AC voltage output from the first stage of the high-frequency transformer is rectified by the voltage doubler circuit to provide a 1kV bus voltage for the high-voltage inverter module. S1, S2, S3, S4, L, and Co constitute the high-voltage inverter module. The two ends of the filter capacitor Co are the output terminals of this synchronous voltage regulation unit. Under the control of the intelligent controller, it can output a low-frequency AC, DC, or AC / DC superimposed voltage waveform from 0 to 100Hz, with a maximum output voltage amplitude of 1kV.

[0063] The intelligent measurement and control module mainly consists of an STM32 controller, a gate driver, and resistors R1 and R2. The voltage divider circuit formed by R1 and R2 is used to measure the voltage across the energy storage capacitor. The serial data receiver consists of an infrared photodetector D3 and its amplifier circuit (omitted in the figure), and the synchronization signal receiver consists of an infrared photodetector D4 and its amplifier circuit (omitted in the figure). The STM32 controller calculates the required PWM signal in real time based on the voltage across the energy storage capacitor, the received target parameters, and the synchronization signal to control the switching states of S1 to S4. The switching frequency is 25kHz. When the test object is an energy storage type (capacitor or inductor), during the energy release phase, the high-voltage inverter module reverses the energy released by the test object and temporarily stores it on the energy storage capacitor instead of directly consuming it. During the energy rise phase, the high-voltage inverter module transfers some of the energy from the energy storage capacitor back into the test object. The external power supply only needs to compensate for the small energy loss during the energy transfer process, thus greatly reducing the power requirements of the input power supply.

[0064] The auxiliary power module receives the voltage from the auxiliary secondary of the high-frequency transformer and converts it into DC voltages such as 12V and 3.3V required for the operation of the synchronous voltage regulation unit.

[0065] When the user inputs DC voltage parameters, the main control unit converts them into a signal that the signal transmitter can recognize according to a preset encoding rule, and transmits it to the synchronous voltage regulation unit. The intelligent PWM controller then calculates the PWM signal for each switching transistor in the high-voltage inverter module, causing the high-voltage inverter module to output the corresponding DC power. The output terminals of each synchronous voltage regulation unit are connected in series to output the superimposed DC power.

[0066] When the user inputs AC voltage parameters, the main control unit converts them into a signal that the signal transmitter can recognize according to a preset encoding rule. This signal is then transmitted to the synchronous voltage regulation unit. The intelligent PWM controller calculates the PWM signal for each switching transistor in the high-voltage inverter module. The main control unit also sends a synchronization signal to each synchronous voltage regulation unit, ultimately ensuring that the high-voltage inverter module of each synchronous voltage regulation unit outputs synchronized AC power. The output terminals of each synchronous voltage regulation unit are connected in series to output phase-synchronized, amplitude-superimposed AC power.

[0067] This invention sends voltage parameters and synchronization signals to each synchronous voltage regulating unit through a main control unit, enabling each unit to output a synchronized voltage based on the user-input voltage parameters, thus achieving a high-voltage power supply capable of outputting both AC and DC voltages. By eliminating the low-frequency transformer and using a high-frequency transformer, the size and weight of the high-voltage power supply using this invention are significantly reduced. The target output high voltage is obtained by connecting several synchronous voltage regulating units in series; each unit only needs to output approximately 1kV, thereby reducing the withstand voltage requirements of the semiconductor switches, making them readily available and inexpensive. Furthermore, this invention utilizes an energy storage capacitor and a high-voltage inverter module with bidirectional energy flow to prevent energy waste in the test sample, thereby improving overall efficiency and reducing the power requirements of the external power supply, making it particularly suitable for high-voltage testing.

[0068] It should be noted that this invention only introduces the technical features associated with the solution. In specific implementation, other conventional setting units can be added on the basis of this invention. For example, an overcurrent protection module can be added to the synchronous voltage regulation unit, etc.

[0069] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0070] It should be noted that, depending on the implementation needs, the various steps / components described in this application can be broken down into more steps / components, or two or more steps / components or parts of the operation of steps / components can be combined into new steps / components to achieve the purpose of this invention.

[0071] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A synchronous superimposed AC / DC high-voltage power supply, characterized in that: include: The AC-DC unit is connected to an external power supply and is used to convert the external power supply voltage into DC voltage. The low-voltage inverter unit, connected to the AC-DC unit, is used to invert DC voltage into high-frequency AC voltage. A high-frequency transformer is used to step up high-frequency AC voltage for output. It includes a primary winding and several secondary windings. The primary winding is connected to a low-voltage inverter unit. Several synchronous voltage regulating units are provided, each of which is connected to one secondary winding of a high-frequency transformer. The outputs of all synchronous voltage regulating units are connected in series to output the DC high voltage or AC high voltage required by the user. Each synchronous voltage regulating unit includes a signal receiver for receiving serial data and synchronization signals. The main control unit receives voltage parameters input by the user and wirelessly transmits serial data representing the voltage parameters and synchronization signals to the signal receivers of each synchronous voltage regulating unit via a signal transmitter, so that each synchronous voltage regulating unit outputs a synchronized voltage according to the voltage parameters input by the user. Each synchronous voltage regulating unit has the same structure, including: A high-frequency rectifier circuit is connected to one of the secondary windings of a high-frequency transformer; The energy storage capacitor is connected in parallel with the output terminal of the high-frequency rectifier circuit. The high-voltage inverter module has its input terminal connected to the output terminal of the high-frequency rectifier circuit, and its output terminal connected in series with the output terminal of the high-voltage inverter module of other synchronous voltage regulation units. The intelligent PWM controller is used to calculate the required PWM signal in real time based on the received voltage parameters, synchronization signal and voltage across the energy storage capacitor and output it to the high-voltage inverter module. The auxiliary power supply provides the low-voltage DC voltage required for the synchronous voltage regulation unit to operate. It is powered by the auxiliary secondary winding of the high-frequency transformer or by the energy storage capacitor.

2. The synchronous superimposed AC / DC high-voltage power supply according to claim 1, characterized in that: The signal transmitter and signal receiver are in two sets, used to transmit synchronization signals and voltage parameters respectively; or The signal transmitter and signal receiver are a set used for time-division transmission of voltage parameters and synchronization signals.

3. The synchronous superimposed AC / DC high-voltage power supply according to claim 2, characterized in that: The signal transmitter is an infrared light transmitter, and the corresponding signal receiver is an infrared light receiver.

4. The synchronous superimposed AC / DC high-voltage power supply according to claim 1, characterized in that: The high-voltage inverter module includes interconnected switching full-bridge inverters and filter circuits; among which, The switching full-bridge inverter includes four high-voltage electronic switches, each of which is connected to a gate drive circuit, which is controlled and driven by an intelligent PWM controller.

5. The synchronous superimposed AC / DC high-voltage power supply according to claim 1, characterized in that: The intelligent PWM controller consists of an MCU and its peripheral circuits.

6. The synchronous superimposed AC / DC high-voltage power supply according to claim 1, characterized in that: Voltage parameters include the voltage waveform, amplitude, and frequency.

7. The synchronous superimposed AC / DC high-voltage power supply according to claim 1, characterized in that: There is one high-frequency transformer, which has one primary and several secondary windings, with each secondary winding corresponding to a synchronous voltage regulating unit.

8. The synchronous superimposed AC / DC high-voltage power supply according to claim 1, characterized in that: There is one high-frequency transformer, which has one primary, several primary and secondary windings, and several auxiliary secondary windings. Each primary and secondary winding corresponds to a high-frequency rectifier circuit of a synchronous voltage regulation unit, and each auxiliary secondary winding provides energy to the auxiliary power supply of a synchronous voltage regulation unit.

9. The synchronous superimposed AC / DC high-voltage power supply according to claim 1, characterized in that: The high-frequency transformer consists of several primary high-frequency transformers connected in parallel, with each high-frequency transformer corresponding to a synchronous voltage regulating unit. Each high-frequency transformer has a primary secondary and an auxiliary secondary. The primary and secondary are connected to the high-frequency rectifier circuit of the synchronous voltage regulating unit, and the auxiliary secondary provides energy to the auxiliary power supply.

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