A high-voltage module based on a double-voltage half-bridge driving circuit and a driving method

Abstract

The application discloses a high-voltage module based on a double-voltage half-bridge driving circuit and a driving method thereof. The high-voltage module comprises a power input unit and a current limiting unit connected to external alternating current; a plurality of rectifier diodes connected to the input end; an energy storage unit adopting an energy storage capacitor C1 and an energy storage capacitor C2; a trigger diode D5 in the trigger unit being connected in relay to the energy storage capacitor C1 and a voltage transformation unit, and a trigger diode D6 being connected in relay to the energy storage capacitor C2 and the voltage transformation unit; a secondary winding of the voltage transformation unit being coupled to induce resonance sharp peaks; a double-voltage rectifier unit generating negative polarity high-voltage direct current through rectification, and the high-voltage direct current being output by a high-voltage output unit. Thus, through simple channel design and storage and discharge design, direct current high-voltage output is realized based on alternating current, the cost of components is greatly reduced, and the product size is significantly reduced. The rectification process realizes channel switching, and driving voltage boosting after rectification is not needed, the alternating current positive / negative half cycle can be driven, the loss is effectively reduced, and the load carrying performance and operation efficiency are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of circuit design technology, and in particular to a high-voltage module and driving method based on a voltage doubler half-bridge drive circuit. Background Technology

[0002] Currently, most ion generators produce gas ions by ionizing gas with high-voltage current. However, as ion generators are increasingly used in civilian applications, existing designs based on industrial equipment or high-voltage architectures are no longer suitable. Therefore, many existing ion generators have adopted DC-DC solutions. However, DC-DC solutions suffer from complex circuit designs and high component costs. Furthermore, the size of DC-DC devices is difficult to control. If portability is further emphasized, under these constraints, poor load-carrying capacity and low efficiency inevitably result. Summary of the Invention

[0003] The first aspect of this embodiment discloses a high-voltage module based on a voltage doubler half-bridge drive circuit, specifically including: The unit includes a power input unit, a current limiting unit, an input rectifier unit, an energy storage unit, a trigger unit, a transformer unit, a voltage multiplier rectifier unit, and a high-voltage output unit. The power input unit includes an input terminal AC-L and an input terminal AC-N for connecting to external AC power; The current limiting unit includes a current limiting resistor R1 disposed at the input terminal AC-L and a current limiting resistor R2 disposed at the input terminal AC-N. The input rectification unit includes a rectifier diode D1 with its positive terminal connected to the input terminal AC-L, a rectifier diode D3 with its negative terminal connected to the input terminal AC-L, a rectifier diode D2 with its negative terminal connected to the input terminal AC-N, and a rectifier diode D4 with its positive terminal connected to the input terminal AC-N. The energy storage unit uses energy storage capacitor C1 and energy storage capacitor C2. One end of energy storage capacitor C1 is connected to the negative terminal of rectifier diode D1 and the other end is connected to the positive terminal of rectifier diode D2. One end of energy storage capacitor C2 is connected to the positive terminal of rectifier diode D3 and the other end is connected to the negative terminal of rectifier diode D4. The triggering unit uses trigger diodes D5 and D6. Trigger diode D5 is connected to the primary winding of transformer T1 in the transformer unit, and trigger diode D6 is connected to the primary winding of transformer T1 in the transformer unit, and energy storage capacitor C2 is connected to the primary winding of transformer T1 in the transformer unit. The secondary winding of transformer T1 in the transformer unit is based on the induced resonance spike coupled to the primary winding; The voltage doubler rectifier unit uses a high-voltage diode D7 with its positive terminal connected to one end of the secondary winding, a high-voltage diode D8 with its negative terminal connected to one end of the secondary winding, and high-voltage capacitors C3 and C4 connected to the secondary winding to generate negative polarity high-voltage direct current based on the resonant peak rectification. The high-voltage output unit includes an output terminal HG-OUT and an output terminal HV-OUT.

[0004] As an optional implementation, an isolation unit is provided between the current limiting unit and the voltage multiplier rectifier unit; The isolation unit uses resistor R3.

[0005] As an optional implementation, resistors R4 and R5 are connected in series at the output terminal HG-OUT of the high-voltage output unit, and resistors R6 and R7 are connected in series at the output terminal HV-OUT.

[0006] As an optional implementation, the external alternating current is a sinusoidal alternating current that is input alternately with positive and negative half-cycles based on the sinusoidal function law.

[0007] As an optional implementation, in the positive half-cycle, the input terminal AC-L is the positive terminal and the input terminal AC-N is the negative terminal. The input terminal AC-L, the current-limiting resistor R1, the rectifier diode D1, the energy storage capacitor C1, the rectifier diode D2, the current-limiting resistor R2, and the input terminal AC-N constitute an energy storage path, and the energy storage capacitor C1 stores and boosts the voltage. The voltage at one end of the energy storage capacitor C1 connected to the rectifier diode D1 is positive, and the voltage at the other end is negative.

[0008] As an optional implementation, when the voltage across the energy storage capacitor C1 reaches the forward voltage of the trigger diode D5, the trigger diode D5 is turned on, and the energy storage capacitor C1 and the primary winding of the transformer T1 form a resonant discharge circuit, and the secondary winding of the transformer T1 couples and induces the resonant spike.

[0009] As an optional implementation, in the negative half-cycle, the input terminal AC-N is the positive terminal and the input terminal AC-L is the negative terminal. The input terminal AC-N, the current-limiting resistor R2, the rectifier diode D4, the energy storage capacitor C2, the rectifier diode D3, the current-limiting resistor R1, and the input terminal AC-L constitute an energy storage path, and the energy storage capacitor C2 stores and boosts the voltage. The voltage at one end of the energy storage capacitor C2 connected to the rectifier diode D4 is positive, and the voltage at the other end is negative.

[0010] As an optional implementation, when the voltage across the energy storage capacitor C2 reaches the forward voltage of the trigger diode D6, the trigger diode D6 is turned on, and the energy storage capacitor C2 and the primary winding of the transformer T1 form a resonant discharge circuit, and the secondary winding of the transformer T1 couples and induces the resonant spike.

[0011] As an optional implementation, the high-voltage output unit periodically supplies the negative polarity high-voltage direct current to the negative ion generator, and the negative ion generator operates stably based on the negative polarity high-voltage direct current.

[0012] The second aspect of this embodiment discloses a driving method, specifically including: Set up independent access routes 1 and 2; Measure the waveform of external alternating current; Based on the current waveform half-cycle, the first path is turned on to charge the first energy storage capacitor. When the voltage across the first energy storage capacitor is higher than the forward voltage of the first trigger diode, the stored current is released by the first energy storage capacitor. When transitioning to the next half-cycle of the waveform, the second path is turned on to charge the second energy storage capacitor. When the voltage across the second energy storage capacitor is higher than the forward voltage of the second trigger diode, the stored current is released by the second energy storage capacitor. Based on the stored current output from the first or second energy storage capacitor, a negative high-voltage direct current is output by voltage multiplication.

[0013] Compared with the prior art, this embodiment has the following beneficial effects: Through a simplified path and storage / discharge design, high-voltage DC output can be achieved directly from household mains or industrial power, significantly reducing component costs and product size. The rectification process is also the path switching process, eliminating the need for a separate boost output driven by the rectified DC power. AC power can drive the output in both positive and negative half-cycles, effectively reducing losses and significantly improving load-carrying capacity and operating efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this embodiment, the accompanying drawings used in the embodiment will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the system principle of a high-voltage module based on a voltage doubler half-bridge drive circuit disclosed in this embodiment; Figure 2This is a schematic diagram of the circuit principle of a high-voltage module based on a voltage doubler half-bridge drive circuit disclosed in this embodiment; Figure 3 This is a schematic diagram of the circuit principle for adjusting the arrangement of the energy storage unit and the trigger unit of a high-voltage module based on a voltage doubler half-bridge drive circuit disclosed in this embodiment; Figure 4 This is a schematic diagram of the circuit principle of another high-voltage module adjusting the arrangement of the energy storage unit and the trigger unit based on the voltage doubler half-bridge drive circuit disclosed in this embodiment; Figure 5 This is a schematic diagram of the circuit principle for adjusting the arrangement of the energy storage unit and the trigger unit of a high-voltage module based on a voltage doubler half-bridge drive circuit disclosed in this embodiment. Figure 6 This is a schematic diagram of the circuit principle of a high-voltage module adjustment storage and discharge path construction method based on a voltage doubler half-bridge drive circuit disclosed in this embodiment; Figure 7 This is a schematic diagram of another high-voltage module adjustment storage and discharge path construction method based on voltage doubler half-bridge drive circuit disclosed in this embodiment; Figure 8 This is a schematic diagram of the circuit principle of another high-voltage module adjustment storage and discharge path construction method based on voltage doubler half-bridge drive circuit disclosed in this embodiment; Figure 9 This is a schematic diagram of the circuit principle of another high-voltage module adjustment storage and discharge path construction method based on voltage doubler half-bridge drive circuit disclosed in this embodiment; Figure 10 This embodiment discloses a circuit principle diagram of a high-voltage module with two independent storage and discharge paths based on a voltage multiplier half-bridge drive circuit. Figure 11 This is a schematic diagram of the circuit principle of another high-voltage module with two independent storage and discharge paths based on a voltage doubler half-bridge drive circuit disclosed in this embodiment. Figure 12 This is a schematic diagram of the circuit principle of another high-voltage module with two independent storage and discharge paths based on a voltage doubler half-bridge drive circuit disclosed in this embodiment. Figure 13 This is a schematic diagram of the circuit principle of another high-voltage module with two independent storage and discharge paths based on a voltage doubler half-bridge drive circuit disclosed in this embodiment. Figure 14 This is a schematic diagram of the workflow of a driving method disclosed in this embodiment. Detailed Implementation

[0016] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Example 1 Please see Figures 1-13 This embodiment discloses a high-voltage module based on a voltage doubler half-bridge drive circuit, comprising: The unit includes a power input unit, a current limiting unit, an input rectifier unit, an energy storage unit, a trigger unit, a transformer unit, a voltage multiplier rectifier unit, and a high-voltage output unit. The power input unit includes an input terminal AC-L and an input terminal AC-N for connecting to external AC power; The current limiting unit includes a current limiting resistor R1 located at the input terminal AC-L and a current limiting resistor R2 located at the input terminal AC-N. The input rectifier unit includes a rectifier diode D1 with its positive terminal connected to the input terminal AC-L, a rectifier diode D3 with its negative terminal connected to the input terminal AC-L, a rectifier diode D2 with its negative terminal connected to the input terminal AC-N, and a rectifier diode D4 with its positive terminal connected to the input terminal AC-N. The energy storage unit uses energy storage capacitors C1 and C2. One end of energy storage capacitor C1 is connected to the negative terminal of rectifier diode D1, and the other end is connected to the positive terminal of rectifier diode D2. One end of energy storage capacitor C2 is connected to the positive terminal of rectifier diode D3, and the other end is connected to the negative terminal of rectifier diode D4. The triggering unit uses trigger diodes D5 and D6. Trigger diode D5 is connected to the primary winding of transformer T1 in the transformer unit via energy storage capacitor C1, and trigger diode D6 is connected to the primary winding of transformer T1 in the transformer unit via energy storage capacitor C2. The secondary winding of transformer T1 in the transformer unit is based on the induced resonance spike of the primary winding coupled with the secondary winding. The voltage multiplier rectifier unit uses a high-voltage diode D7 with its positive terminal connected to one end of the secondary winding, a high-voltage diode D8 with its negative terminal connected to one end of the secondary winding, and high-voltage capacitors C3 and C4 connected to the secondary winding to generate negative polarity high-voltage DC power based on resonant peak rectification. The high-voltage output unit includes output terminals HG-OUT and HV-OUT.

[0018] In this embodiment, while rectifying the external AC, the path and storage / discharge components are designed for the positive half-cycle and negative half-cycle respectively, so that high-voltage DC output can be achieved twice in each complete sine cycle, in the positive half-cycle and the negative half-cycle.

[0019] Compared to existing solutions that only achieve a single output per complete sine cycle, its efficiency is significantly improved.

[0020] Meanwhile, since the rectification process is also the path switching process, there is no need to drive the boost output separately based on the DC power after rectification, so there is no ineffective loss in the conversion process.

[0021] When using high-performance energy storage capacitors, it can output -3.5kV negative high-voltage DC power under a 100MΩ resistive load, demonstrating excellent load-carrying performance.

[0022] Furthermore, through the above-mentioned simplified pathway and storage / discharge design, the cost of components can be significantly reduced, and the product size can be significantly reduced, making it more suitable for the development and application of ion generating equipment in the civilian field.

[0023] As an optional implementation, an isolation unit is provided between the current limiting unit and the voltage multiplier rectifier unit; The isolation unit uses resistor R3.

[0024] As an optional implementation, resistors R4 and R5 are connected in series at the output terminal HG-OUT of the high-voltage output unit, and resistors R6 and R7 are connected in series at the output terminal HV-OUT.

[0025] As an optional implementation, the external alternating current is a sinusoidal alternating current that is input alternately with positive and negative half-cycles based on the law of sinusoidal function.

[0026] As an optional implementation, in the positive half-cycle, the input terminal AC-L is the positive terminal and the input terminal AC-N is the negative terminal. The input terminal AC-L, the current limiting resistor R1, the rectifier diode D1, the energy storage capacitor C1, the rectifier diode D2, the current limiting resistor R2 and the input terminal AC-N constitute the energy storage path, and the energy storage capacitor C1 stores energy and boosts the voltage. The voltage across one end of the energy storage capacitor C1 connected to the rectifier diode D1 is positive, and the voltage across the other end is negative.

[0027] As an optional implementation, when the voltage across the energy storage capacitor C1 reaches the turn-on voltage of the trigger diode D5, the trigger diode D5 turns on, and the energy storage capacitor C1 and the primary winding of the transformer T1 form a resonant discharge circuit, and the secondary winding of the transformer T1 couples to generate a resonant spike.

[0028] Here, when the energy storage capacitor C1 is boosted, the rectifier diode D4, energy storage capacitor C2, rectifier diode D3, and trigger diode D6 are all inactive. At this time, the input terminal AC-L, current limiting resistor R1, rectifier diode D1, energy storage capacitor C1, rectifier diode D2, current limiting resistor R2, and input terminal AC-N form the energy storage path.

[0029] As an optional implementation, in the negative half-cycle, the input terminal AC-N is the positive terminal and the input terminal AC-L is the negative terminal. The input terminal AC-N, the current limiting resistor R2, the rectifier diode D4, the energy storage capacitor C2, the rectifier diode D3, the current limiting resistor R1 and the input terminal AC-L constitute the energy storage path, and the energy storage capacitor C2 stores energy and boosts the voltage. The voltage at one end of the energy storage capacitor C2 connected to the rectifier diode D4 is positive, and the voltage at the other end is negative.

[0030] As an optional implementation, when the voltage across the energy storage capacitor C2 reaches the turn-on voltage of the trigger diode D6, the trigger diode D6 turns on, and the energy storage capacitor C2 and the primary winding of the transformer T1 form a resonant discharge circuit, and the secondary winding of the transformer T1 couples to generate a resonant spike.

[0031] Here, when the energy storage capacitor C2 is boosted, the rectifier diode D1, the energy storage capacitor C2, the rectifier diode D2, and the trigger diode D5 are all not working. At this time, the input terminal AC-N, the current limiting resistor R2, the rectifier diode D4, the energy storage capacitor C2, the rectifier diode D3, the current limiting resistor R1, and the input terminal AC-L constitute the energy storage path.

[0032] It is evident that by designing separate paths and storage / discharge components for the positive and negative half-cycles, high-voltage DC output can be achieved twice in each complete sine cycle, significantly improving energy utilization efficiency and operating efficiency.

[0033] Furthermore, since the rectification process is also the path switching process, there is no need to drive the boost output separately based on the rectified DC power, and therefore there is no ineffective loss in the conversion process.

[0034] It is understandable that, such as Figures 2-5 As shown, for the energy storage capacitors C1 and C2 in the energy storage unit, and the trigger diodes D5 and D6 in the trigger unit, as long as they can respectively form a path to realize the storage and discharge function, the front and rear relationships of the energy storage unit and the trigger unit are not constant. The energy storage unit can be placed at the front end of the trigger unit or at the rear end of the trigger unit.

[0035] Furthermore, such as Figures 6-9 As shown, for energy storage capacitors C1 and C2 in the energy storage unit, and trigger diodes D5 and D6 in the trigger unit, as long as they can each form a path to achieve the storage and discharge function, the construction method of different paths is not constant. For example, for trigger diode D6, it can be constructed as follows: Figure 2 As shown, the two ends are connected to the positive terminals of rectifier diode D2 and rectifier diode D3 respectively, or as shown in the diagram. Figure 8As shown, the two ends are connected to the positive terminal of rectifier diode D2 and the negative terminal of rectifier diode D4, respectively. It can also be done as follows: Figure 6 As shown, it is placed at the rear end of the energy storage unit.

[0036] Furthermore, such as Figures 10-13 As shown, for the energy storage capacitors C1 and C2 in the energy storage unit, and the trigger diodes D5 and D6 in the trigger unit, independent circuit connections can be established for different energy storage and discharge paths, instead of sharing some circuit paths. Accordingly, the two energy storage and discharge paths are independently connected to the transformer unit and their corresponding input terminals, and are isolated from each other during operation. Even if one energy storage and discharge path fails, the other energy storage and discharge path remains unaffected and can still maintain half-cycle drive, preventing overall failure.

[0037] As an optional implementation, the high-voltage output unit periodically supplies negative polarity high-voltage direct current to the negative ion generator, and the negative ion generator operates stably based on the negative polarity high-voltage direct current.

[0038] Compared with the prior art, this embodiment has the following beneficial effects: Through a simplified path and storage / discharge design, high-voltage DC output can be achieved directly from household mains or industrial power, significantly reducing component costs and product size. The rectification process is also the path switching process, eliminating the need for a separate boost output driven by the rectified DC power. AC power can drive the output in both positive and negative half-cycles, effectively reducing losses and significantly improving load-carrying capacity and operating efficiency.

[0039] Example 2 Please see Figure 14 This embodiment discloses a driving method, including: S1. Set up independent Path 1 and Path 2.

[0040] S2. Measure the waveform of the external alternating current.

[0041] S3. Based on the current half-cycle of the waveform, turn on the first path to charge the first energy storage capacitor. When the voltage across the first energy storage capacitor is higher than the forward voltage of the first trigger diode, the first energy storage capacitor releases the stored current.

[0042] S4. When transitioning to the next half-cycle of the waveform, the second path is turned on to charge the second energy storage capacitor. When the voltage across the second energy storage capacitor is higher than the forward voltage of the second trigger diode, the stored current is released by the second energy storage capacitor.

[0043] S5. Based on the stored current output from the No. 1 or No. 2 storage capacitor, output negative polarity high voltage DC power through voltage multiplication.

[0044] In this embodiment, during the continuous input of alternating current, steps S3 and S4 are continuously executed in a loop based on the waveform half-cycle conversion action.

[0045] Thus, in each complete sine cycle, based on independent Path 1 and Path 2, two high-voltage DC outputs are achieved in the positive half-cycle and the negative half-cycle.

[0046] Compared to existing solutions that only achieve a single output per complete sine cycle, its efficiency is significantly improved.

Claims

1. A high-voltage module based on a voltage doubler half-bridge drive circuit, characterized in that, include: The unit includes a power input unit, a current limiting unit, an input rectifier unit, an energy storage unit, a trigger unit, a transformer unit, a voltage multiplier rectifier unit, and a high-voltage output unit. The power input unit includes an input terminal AC-L and an input terminal AC-N for connecting to external AC power; The current limiting unit includes a current limiting resistor R1 disposed at the input terminal AC-L and a current limiting resistor R2 disposed at the input terminal AC-N. The input rectification unit includes a rectifier diode D1 with its positive terminal connected to the input terminal AC-L, a rectifier diode D3 with its negative terminal connected to the input terminal AC-L, a rectifier diode D2 with its negative terminal connected to the input terminal AC-N, and a rectifier diode D4 with its positive terminal connected to the input terminal AC-N. The energy storage unit uses energy storage capacitor C1 and energy storage capacitor C2. One end of energy storage capacitor C1 is connected to the negative terminal of rectifier diode D1 and the other end is connected to the positive terminal of rectifier diode D2. One end of energy storage capacitor C2 is connected to the positive terminal of rectifier diode D3 and the other end is connected to the negative terminal of rectifier diode D4. The triggering unit uses trigger diodes D5 and D6. Trigger diode D5 is connected to the primary winding of transformer T1 in the transformer unit, and trigger diode D6 is connected to the primary winding of transformer T1 in the transformer unit, and energy storage capacitor C2 is connected to the primary winding of transformer T1 in the transformer unit. The secondary winding of transformer T1 in the transformer unit is based on the induced resonance spike coupled to the primary winding; The voltage doubler rectifier unit uses a high-voltage diode D7 with its positive terminal connected to one end of the secondary winding, a high-voltage diode D8 with its negative terminal connected to one end of the secondary winding, and high-voltage capacitors C3 and C4 connected to the secondary winding to generate negative polarity high-voltage direct current based on the resonant peak rectification. The high-voltage output unit includes an output terminal HG-OUT and an output terminal HV-OUT.

2. The high-voltage module based on a voltage doubler half-bridge drive circuit according to claim 1, characterized in that, include: An isolation unit is provided between the current limiting unit and the voltage multiplier rectifier unit; The isolation unit uses resistor R3.

3. A high-voltage module based on a voltage doubler half-bridge drive circuit according to claim 1, characterized in that, include: The output terminal HG-OUT of the high voltage output unit is connected in series with resistors R4 and R5, and the output terminal HV-OUT is connected in series with resistors R6 and R7.

4. A high-voltage module based on a voltage doubler half-bridge drive circuit according to claim 1, characterized in that, include: The external alternating current is a sinusoidal alternating current that is input alternately in the positive and negative half-cycles, based on the law of sinusoidal function.

5. A high-voltage module based on a voltage doubler half-bridge drive circuit according to claim 4, characterized in that, include: During the positive half-cycle, the input terminal AC-L is the positive terminal and the input terminal AC-N is the negative terminal. The input terminal AC-L, the current-limiting resistor R1, the rectifier diode D1, the energy storage capacitor C1, the rectifier diode D2, the current-limiting resistor R2, and the input terminal AC-N constitute an energy storage path, and the energy storage capacitor C1 stores energy and boosts voltage. The voltage at one end of the energy storage capacitor C1 connected to the rectifier diode D1 is positive, and the voltage at the other end is negative.

6. A high-voltage module based on a voltage doubler half-bridge drive circuit according to claim 5, characterized in that, include: When the voltage across the energy storage capacitor C1 reaches the forward voltage of the trigger diode D5, the trigger diode D5 turns on, and the energy storage capacitor C1 and the primary winding of the transformer T1 form a resonant discharge circuit. The secondary winding of the transformer T1 then couples and induces the resonant spike.

7. A high-voltage module based on a voltage doubler half-bridge drive circuit according to claim 4, characterized in that, include: During the negative half-cycle, the input terminal AC-N is the positive terminal and the input terminal AC-L is the negative terminal. The input terminal AC-N, the current-limiting resistor R2, the rectifier diode D4, the energy storage capacitor C2, the rectifier diode D3, the current-limiting resistor R1, and the input terminal AC-L constitute an energy storage path, and the energy storage capacitor C2 stores energy and boosts voltage. The voltage at one end of the energy storage capacitor C2 connected to the rectifier diode D4 is positive, and the voltage at the other end is negative.

8. A high-voltage module based on a voltage doubler half-bridge drive circuit according to claim 7, characterized in that, include: When the voltage across the energy storage capacitor C2 reaches the forward voltage of the trigger diode D6, the trigger diode D6 turns on, and the energy storage capacitor C2 and the primary winding of the transformer T1 form a resonant discharge circuit. The secondary winding of the transformer T1 then couples and induces the resonant spike.

9. A high-voltage module based on a voltage doubler half-bridge drive circuit according to claim 1, characterized in that, include: The high-voltage output unit periodically supplies the negative polarity high-voltage direct current to the negative ion generator, and the negative ion generator operates stably based on the negative polarity high-voltage direct current.

10. A driving method, characterized in that, include: Set up independent access routes 1 and 2; Measure the waveform of external alternating current; Based on the current waveform half-cycle, the first path is turned on to charge the first energy storage capacitor. When the voltage across the first energy storage capacitor is higher than the forward voltage of the first trigger diode, the stored current is released by the first energy storage capacitor. When transitioning to the next half-cycle of the waveform, the second path is turned on to charge the second energy storage capacitor. When the voltage across the second energy storage capacitor is higher than the forward voltage of the second trigger diode, the stored current is released by the second energy storage capacitor. Based on the stored current output from the first or second energy storage capacitor, a negative high-voltage direct current is output by voltage multiplication.

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