CN213305229U - DC high-voltage power supply - Google Patents

Abstract

The utility model discloses a direct current high voltage power supply, which is applied to static elimination equipment and comprises a positive high voltage module, a negative high voltage module and a control module; the positive high-voltage module and the negative high-voltage module are respectively electrically connected with the control module and are respectively used for converting low-voltage direct current input into positive high-voltage direct current output and negative high-voltage direct current output; the control module is used for controlling the waveform of the low-voltage direct current input so as to adjust the waveforms of the positive high-voltage direct current output and the negative high-voltage direct current output. The direct-current high-voltage power supply regulates and controls the waveform of low-voltage direct-current input through the control module, so that the control on the high-voltage output waveform is realized, the output regulation is convenient, the power supply application scene is wide, the direct-current high-voltage power supply can be well suitable for the electricity eliminating work under various electrostatic environments, and the electricity eliminating performance of the electrostatic eliminating equipment is effectively improved.

Description

DC high-voltage power supply

Technical Field

The embodiment of the utility model provides a relate to the electrostatic elimination technique, especially relate to a direct current high voltage power supply.

Background

The DC ion bar is a common static electricity eliminating device in industrial manufacture, and a matched DC high-voltage power supply has very important influence on the electricity eliminating performance. The traditional direct-current high-voltage power supply generally has fixed output, and the output characteristic cannot be adjusted, so that the adaptability to a complex static environment is poor, the condition of insufficient electricity eliminating performance possibly exists, and the production is hindered.

SUMMERY OF THE UTILITY MODEL

Based on this, to above-mentioned technical problem, the utility model provides a direct current high voltage power supply can adjust the high-voltage output characteristic in order to be applicable to different electrostatic environment, effectively improves the electricity consumption performance.

In a first aspect, an embodiment of the present invention provides a dc high voltage power supply, which is applied to an electrostatic elimination device, and includes a positive high voltage module, a negative high voltage module, and a control module; the positive high-voltage module and the negative high-voltage module are respectively electrically connected with the control module and are respectively used for converting low-voltage direct current input into positive high-voltage direct current output and negative high-voltage direct current output; the control module is used for controlling the waveform of the low-voltage direct current input so as to adjust the waveforms of the positive high-voltage direct current output and the negative high-voltage direct current output.

The direct-current high-voltage power supply regulates and controls the waveform of low-voltage direct-current input through the control module, so that the control on the high-voltage output waveform is realized, the output regulation is convenient, the power supply application scene is wide, the direct-current high-voltage power supply can be well suitable for the electricity eliminating work under various electrostatic environments, and the electricity eliminating performance of the electrostatic eliminating equipment is effectively improved.

In one embodiment, the control module comprises a switch tube and/or a digital potentiometer; the switching tube is used for controlling the frequency and the duty ratio of low-voltage direct current input, and the digital potentiometer is used for controlling the amplitude of the low-voltage direct current input.

In one embodiment, the positive high-voltage module comprises a first driving circuit, a first electronic transformer and a positive voltage-multiplying rectifying unit, wherein the first driving circuit drives the first electronic transformer to work, so that a low-voltage direct-current input is converted into a high-frequency alternating current through the first electronic transformer, and the high-frequency alternating current is converted into a positive high-voltage direct-current output through the positive voltage-multiplying rectifying unit;

the negative high-voltage module comprises a second driving circuit, a second electronic transformer and a negative voltage-multiplying rectification unit, wherein the second driving circuit drives the second electronic transformer to work, so that low-voltage direct-current input is converted into high-frequency alternating current through the second electronic transformer, and the high-frequency alternating current is converted into negative high-voltage direct-current output through the negative voltage-multiplying rectification unit.

In one embodiment, the dc high voltage power supply further includes:

the output detection module is electrically connected with the positive high-voltage module, the negative high-voltage module and the control module respectively, and is used for monitoring the amplitudes of the positive high-voltage direct current output and the negative high-voltage direct current output and sending a detection signal to the control module; the control module adjusts the amplitudes of the positive high-voltage direct-current output and the negative high-voltage direct-current output according to the detection signal.

In one embodiment, the control module sends out an alarm signal when the detection signal is equal to or lower than a preset high-voltage threshold value.

In one embodiment, the output detection module comprises a positive high voltage detection unit and a negative high voltage detection unit;

the positive high-voltage detection unit comprises a first resistor, a second resistor, a first capacitor and a first operational amplifier adjusting circuit; one end of the first resistor is electrically connected with the output end of the positive high-voltage module, and the other end of the first resistor is connected with the second resistor in series; the first capacitor is connected with the second resistor in parallel and is grounded; the voltage signal on the second resistor forms a detection signal of positive high-voltage direct current output through the first operational amplifier adjusting circuit;

the negative high-voltage detection unit comprises a third resistor, a fourth resistor, a second capacitor and a second operational amplifier adjusting circuit; one end of the third resistor is electrically connected with the output end of the negative high-voltage module, and the other end of the third resistor is connected with the fourth resistor in series; the second capacitor is connected with the fourth resistor in parallel and is grounded; and a voltage signal on the fourth resistor forms a detection signal of negative high-voltage direct current output through the second operational amplifier adjusting circuit.

In one embodiment, the first resistor, the second resistor, the third resistor and the fourth resistor are high-voltage non-inductive resistors, and the resistance of the first resistor is higher than that of the second resistor, and the resistance of the third resistor is higher than that of the fourth resistor; the first capacitor and the second capacitor are filter capacitors.

In one embodiment, the first resistor is 1000 times as large as the second resistor, and the third resistor is 1000 times as large as the fourth resistor.

In one embodiment, the dc high voltage power supply further includes:

and the display module is electrically connected with the control module and used for displaying the amplitude values of the positive high-voltage direct current output and the negative high-voltage direct current output according to the detection signal.

In one embodiment, the dc high voltage power supply further includes:

and the infrared receiving module is electrically connected with the control module and used for receiving an infrared remote control signal so as to remotely control the control module.

Drawings

FIG. 1 is a block diagram of a DC high voltage power supply in accordance with one embodiment;

FIG. 2 is a schematic diagram of an embodiment of a DC high voltage power supply;

FIG. 3 is a schematic structural diagram of a positive high voltage detecting unit according to an embodiment;

FIG. 4 is a schematic structural diagram of a negative high voltage detecting unit according to an embodiment;

FIG. 5 is a schematic diagram of output waveforms of the positive high voltage module and the negative high voltage module in one embodiment;

FIG. 6 is a schematic diagram of output waveforms of the positive high voltage module and the negative high voltage module in another embodiment;

FIG. 7 is a schematic diagram of output waveforms of the positive high voltage module and the negative high voltage module in another embodiment;

FIG. 8 is a schematic diagram of output waveforms of the positive high voltage module and the negative high voltage module in another embodiment;

fig. 9 is a schematic diagram of output waveforms of the positive high voltage module and the negative high voltage module in another embodiment.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Fig. 1 is a block diagram of a dc high voltage power supply in an embodiment, as shown in fig. 1, in an embodiment, a dc high voltage power supply 100 is applied to an electrostatic elimination apparatus, the dc high voltage power supply 100 includes a positive high voltage module 120, a negative high voltage module 140, and a control module 160; the positive high-voltage module 120 and the negative high-voltage module 140 are respectively electrically connected with the control module 160, and the positive high-voltage module 120 and the negative high-voltage module 140 are respectively used for converting a low-voltage direct-current input into a positive high-voltage direct-current output and a negative high-voltage direct-current output; the control module 160 is used to control the waveform of the low voltage dc input to adjust the waveforms of the positive high voltage dc output and the negative high voltage dc output.

Specifically, the dc high voltage power supply 100 may be applied to supply power to an electrostatic elimination device such as an ion bar, in the electrostatic elimination device, the ion bar may be electrically connected to the dc high voltage power supply 100 through a high voltage wire, the dc high voltage power supply 100 outputs high voltage direct current to the ion bar, and an electrode needle is disposed on the ion bar. In the film rolling process, the ion bar is vertically arranged right above the film so as to eliminate the static electricity of the film.

In the dc high voltage power supply 100, the input ends of the positive high voltage module 120 and the negative high voltage module 140 are respectively connected to a positive low voltage dc input and a negative low voltage dc input, the positive low voltage dc input is transformed into a positive high voltage dc output after being subjected to the voltage transformation processing of the positive high voltage module 120, and the negative low voltage dc input is transformed into a negative high voltage dc output after being subjected to the voltage transformation processing of the negative high voltage module 140, wherein parameters such as the amplitudes of the positive low voltage dc input, the negative low voltage dc input, the positive high voltage dc output, and the negative high voltage dc output can be specifically determined according to the actual power supply requirements. The control module 160 is electrically connected to the input terminals of the positive high voltage module 120 and the negative high voltage module 140, respectively, and the control module 160 can adjust the waveform of the low voltage dc input to control the waveforms of the positive high voltage dc output and the negative high voltage dc output, thereby adjusting the ion output characteristics of the ion bar and improving the electricity dissipation performance thereof.

Further, the control module 160 may generally include a control circuit such as a single chip, and the waveform control of the control module 160 for the high voltage dc output may specifically include an amplitude, a frequency, and a duty ratio, for example, positive and negative ion output amounts of the ion bar may be respectively adjusted by adjusting the amplitude or the duty ratio of the high voltage dc output, and an ion output distance of the ion bar may be adjusted by adjusting the frequency of the high voltage dc output, so that the ion bar may be adapted to various power consumption situations, and the static electricity eliminating device may be used more conveniently and flexibly, and has a wider applicability.

The direct-current high-voltage power supply 100 regulates and controls the waveform of low-voltage direct-current input through the control module, so that the control of high-voltage output waveform is realized, the output regulation is convenient, the power supply application scene is wide, the direct-current high-voltage power supply can be well suitable for the electricity eliminating work under various electrostatic environments, and the electricity eliminating performance of the electrostatic eliminating equipment is effectively improved.

In one embodiment, the control module 160 includes a switch tube and/or a digital potentiometer; the switching tube is used for controlling the frequency and the duty ratio of low-voltage direct current input, and the digital potentiometer is used for controlling the amplitude of the low-voltage direct current input.

Specifically, in the control module, the single chip microcomputer control circuit may control the low voltage dc input waveforms input into the positive high voltage module 120 and the negative high voltage module 140 by controlling a switching tube or a digital potentiometer, wherein the switching tube is generally used to control the frequency and duty ratio of the low voltage dc input, the ion output distance of the ion rod may be adjusted by controlling the frequency of the dc input, the positive and negative ion output ratio of the ion rod may be adjusted by controlling the duty ratio of the dc input, and the digital potentiometer is generally used to control the amplitude of the low voltage dc input, so as to adjust the ion output quantity of the ion rod.

Fig. 2 is a schematic structural diagram of a direct-current high-voltage power supply in an embodiment, as shown in fig. 2, in an embodiment, based on the above technical solution, the positive high-voltage module may specifically include a first driving circuit 122, a first electronic transformer 124, and a positive voltage doubling rectifying unit 126, where the first driving circuit 122 drives the first electronic transformer 124 to operate, so that a low-voltage direct-current input is converted into a high-frequency alternating current through the first electronic transformer 124, and the high-frequency alternating current is converted into a positive high-voltage direct-current output through the positive voltage doubling rectifying unit 126. The negative high voltage module may specifically include a second driving circuit 142, a second electronic transformer 144, and a negative voltage-multiplying rectifying unit 146, where the second driving circuit 142 drives the second electronic transformer 144 to operate, so that the low voltage dc input is converted into a high frequency ac power through the second electronic transformer 144, and the high frequency ac power is converted into a negative high voltage dc output through the negative voltage-multiplying rectifying unit 146.

Specifically, in the dc high voltage power supply 100, the control module may include a first digital potentiometer 161, a second digital potentiometer 162, a first switch tube 163, a second switch tube 164, and a control unit 165. The positive low voltage dc input is coupled to the input terminal of the first driving circuit 122 via the first digital potentiometer 161 and the first switch tube 163, and the negative low voltage dc input is coupled to the input terminal of the second driving circuit 142 via the second digital potentiometer 162 and the second switch tube 164. The control unit 165 may be a single chip microcomputer control circuit or other controller.

In one embodiment, the dc high voltage power supply 100 further comprises: the output detection module 170 is electrically connected to the positive high voltage module, the negative high voltage module and the control module 160, the output detection module 170 is configured to monitor the amplitudes of the positive high voltage dc output and the negative high voltage dc output, and send a detection signal to the control module 160, and the control module 160 adjusts the amplitudes of the positive high voltage dc output and the negative high voltage dc output according to the detection signal.

Specifically, the control module 160 may determine whether the output of the dc high voltage power supply 100 is suitable according to the detection signal, if the amplitude of the positive and negative high voltage dc outputs meets the expectation, the processing may not be performed, if the amplitude of the positive and negative high voltage dc outputs does not meet the expectation, the control module 160 may adjust the amplitudes of the positive and negative high voltage dc outputs, or directly cut off the low voltage dc input and send an alarm signal, and specifically may alarm the user in the form of an indicator light or sound, so that the user or an operator may overhaul the dc high voltage power supply 100, thereby implementing real-time state monitoring of the dc high voltage power supply 100, and effectively improving reliability and stability of the dc high voltage power supply 100.

Further, the output detection module 170 may specifically include a positive high voltage detection unit 172 and a negative high voltage detection unit 174, the positive high voltage detection unit 172 is electrically connected to the output end of the positive voltage doubling rectifying unit 126, and the negative high voltage detection unit 174 is electrically connected to the output end of the negative voltage doubling rectifying unit 146. The positive high voltage detection unit 172 and the negative high voltage detection unit 174 are also electrically connected to the control unit 165, respectively. The positive high voltage detection unit 172 and the negative high voltage detection unit 174 detect the amplitudes of the positive high voltage dc output and the negative high voltage dc output respectively and send detection signals to the control unit 165, the control unit 165 determines whether the current positive high voltage dc output and the current negative high voltage dc output are appropriate according to the detection signals, and if not, the adjustment of the positive high voltage dc output and the negative high voltage dc output is realized by controlling the first digital potentiometer 161, the second digital potentiometer 162, the first switch tube 163 and the fourth switch tube 164.

Fig. 5 is a schematic diagram of output waveforms of the positive high voltage module and the negative high voltage module in an embodiment, as shown in fig. 5, if it is determined that the current ion rod has insufficient static elimination performance and the positive ion output amount needs to be increased, that is, the positive high voltage dc output amplitude or the duty ratio needs to be increased, the control unit 165 may increase the voltage amplitude of the positive low voltage dc input by adjusting the first digital potentiometer 161 to increase the positive high voltage output amplitude; or the control unit 165 may increase the power supply time of the positive low-voltage dc input voltage in 1 cycle by adjusting the first switch tube 163 and the second switch tube 164, so as to increase the duty ratio of the positive high-voltage output in 1 cycle, thereby increasing the output of the positive ions.

Fig. 6 is a schematic diagram of output waveforms of the positive high voltage module and the negative high voltage module in another embodiment, in an embodiment, as shown in fig. 6, if it is determined that the current ion rod has insufficient power dissipation performance and the negative ion output quantity needs to be increased, that is, the negative high voltage dc output amplitude or the duty ratio needs to be increased, the control unit 165 may increase the voltage amplitude of the negative low voltage dc input by adjusting the second digital potentiometer 162, so as to increase the negative high voltage output amplitude; or the control unit 165 may increase the power supply time of the negative low-voltage dc input voltage in 1 cycle by adjusting the first switch tube 163 and the second switch tube 164, so as to increase the duty ratio of the negative high-voltage output in 1 cycle, thereby increasing the output of the negative ions.

Fig. 7 is a schematic diagram of output waveforms of a positive high voltage module and a negative high voltage module in another embodiment, and fig. 8 is a schematic diagram of output waveforms of the positive high voltage module and the negative high voltage module in another embodiment, and in an embodiment, as shown in fig. 7 and fig. 8, in the case that positive and negative high voltages are alternately output or the positive and negative high voltages are simultaneously output, if it is determined that the output quantity of positive and negative ions needs to be simultaneously increased, and the overall power consumption capability of the ion bar is improved, the control unit 165 may increase the voltage amplitudes of the positive and negative low-voltage direct current inputs by adjusting the first digital potentiometer 161 and the second digital potentiometer 162, so that the output amplitudes of the positive and negative high voltages are simultaneously increased, and thus the simultaneous increase of.

Fig. 9 is a schematic diagram of output waveforms of the positive high voltage module and the negative high voltage module in another embodiment, in an embodiment, as shown in fig. 9, if the winding roller drives the film to move faster when eliminating static electricity, and in order to completely eliminate static electricity on a to-be-eliminated object moving at a high speed, the control unit 165 may increase the switching frequency of the first switching tube 163 and the second switching tube 164 to increase the alternating frequency of the positive low-voltage dc input voltage and the negative low-voltage dc input voltage, so that both positive ions and negative ions can reach the surface of the to-be-eliminated object most efficiently, and the electric elimination effect is ensured.

In one embodiment, the dc high voltage power supply 100 further comprises: and the display module 180 is electrically connected with the control module 160 and is used for displaying the amplitude of the positive high-voltage direct current output and the amplitude of the negative high-voltage direct current output according to the detection signal. The dc high voltage power supply 100 may further include a display screen, and the control module 160 controls the display module 180 to display the corresponding positive high voltage output amplitude and the negative high voltage output amplitude according to the detection signal, so that a user may monitor the output amplitude of the dc high voltage power supply 100 in real time, and may better determine the working state thereof.

In one embodiment, the dc high voltage power supply 100 further comprises: and the infrared receiving module 190 is electrically connected with the control module 160 and is used for receiving an infrared remote control signal so as to remotely control the control module 160. The infrared receiving module 190 can be electrically connected to the single chip microcomputer control circuit in the control module 160, and can receive the infrared remote control signal and send a corresponding instruction to the control module 160, so that a user or an operator can adjust the high-voltage output waveform of the dc high-voltage power supply 100 by using an infrared remote controller according to the field static environment and the power dissipation requirement, thereby facilitating the dissipation of static electricity.

Fig. 3 is a schematic structural diagram of a positive high voltage detection unit in an embodiment, fig. 4 is a schematic structural diagram of a negative high voltage detection unit in an embodiment, and referring to fig. 3 and fig. 4, in an embodiment, on the basis of the foregoing technical solution, the output detection module 170 includes a positive high voltage detection unit and a negative high voltage detection unit; as shown in fig. 3, the positive high voltage detecting unit includes a first resistor R1, a second resistor R2, a first capacitor C1, and a first operational amplifier adjusting circuit; one end of the first resistor R1 is electrically connected with the output end of the positive high-voltage module, and the other end of the first resistor R1 is connected with the second resistor R2 in series; the first capacitor C1 is connected in parallel with the second resistor R2 and is grounded; the voltage signal on the second resistor R2 passes through the first operational amplifier regulating circuit to form a detection signal of positive high-voltage direct current output; as shown in fig. 4, the negative high voltage detecting unit includes a third resistor R3, a fourth resistor R4, a second capacitor C2, and a second operational amplifier adjusting circuit; one end of the third resistor R3 is electrically connected with the output end of the negative high-voltage module, and the other end of the third resistor R3 is connected with the fourth resistor R4 in series; the second capacitor C2 is connected in parallel with the fourth resistor R4 and is grounded; the voltage signal of the fourth resistor R4 passes through the second operational amplifier adjusting circuit to form a detection signal of negative high-voltage direct current output.

Specifically, in the positive high voltage detection unit, the first resistor R1 and the second resistor R2 may be high voltage non-inductive resistors, and the first capacitor C1 is a filter capacitor, wherein the resistance of the first resistor R1 is higher than that of the second resistor R2, and the specific resistances of the first resistor R1 and the second resistor R2 may be determined according to actual circuit conditions, and in a preferred embodiment, the resistance of the first resistor R1 may be 1000 times that of the second resistor R2. First resistance R1 of high resistance and the second resistance R2 of low resistance are established ties, and first resistance R1's the other end is connected with positive high voltage direct current output end electricity, and second resistance R2's the other end ground connection, and the voltage signal on the second resistance R2 forms detection signal and sends to control module 160 after first operational amplifier regulating circuit from this.

It can be understood that the negative high voltage detection unit is similar to the positive high voltage detection unit in structure and principle and is used for detecting the voltage amplitude of the negative high voltage direct current output end. The third resistor R3 and the fourth resistor R4 may be high-voltage non-inductive resistors, and the second capacitor C2 is a filter capacitor, wherein the third resistor R3 has a higher resistance than the fourth resistor R4, and in a preferred embodiment, the third resistor R3 also has a resistance 1000 times that of the fourth resistor R4.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above embodiments only represent the preferred embodiments of the present invention and the technical principles applied, and the description thereof is specific and detailed, but not construed as limiting the scope of the invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (10)

1. A direct-current high-voltage power supply is applied to static elimination equipment and is characterized by comprising a positive high-voltage module, a negative high-voltage module and a control module; the positive high-voltage module and the negative high-voltage module are respectively electrically connected with the control module and are respectively used for converting low-voltage direct current input into positive high-voltage direct current output and negative high-voltage direct current output; the control module is used for controlling the waveform of the low-voltage direct current input so as to adjust the waveforms of the positive high-voltage direct current output and the negative high-voltage direct current output.

2. The direct-current high-voltage power supply according to claim 1, wherein the control module comprises a switch tube and/or a digital potentiometer; the switching tube is used for controlling the frequency and the duty ratio of low-voltage direct current input, and the digital potentiometer is used for controlling the amplitude of the low-voltage direct current input.

3. The direct-current high-voltage power supply according to claim 1, wherein the positive high-voltage module comprises a first driving circuit, a first electronic transformer and a positive voltage-multiplying rectifying unit, the first driving circuit drives the first electronic transformer to work, so that a low-voltage direct-current input is converted into a high-frequency alternating current through the first electronic transformer, and the high-frequency alternating current is converted into a positive high-voltage direct-current output through the positive voltage-multiplying rectifying unit;

the negative high-voltage module comprises a second driving circuit, a second electronic transformer and a negative voltage-multiplying rectification unit, wherein the second driving circuit drives the second electronic transformer to work, so that low-voltage direct-current input is converted into high-frequency alternating current through the second electronic transformer, and the high-frequency alternating current is converted into negative high-voltage direct-current output through the negative voltage-multiplying rectification unit.

4. The dc high voltage power supply of claim 1, further comprising:

the output detection module is electrically connected with the positive high-voltage module, the negative high-voltage module and the control module respectively, and is used for monitoring the amplitudes of the positive high-voltage direct current output and the negative high-voltage direct current output and sending a detection signal to the control module; the control module adjusts the amplitudes of the positive high-voltage direct-current output and the negative high-voltage direct-current output according to the detection signal.

5. The DC high voltage power supply according to claim 4, wherein the control module issues an alarm signal when the detection signal is equal to or lower than a preset high voltage threshold.

6. The DC high voltage power supply according to claim 4, wherein the output detection module comprises a positive high voltage detection unit and a negative high voltage detection unit;

the positive high-voltage detection unit comprises a first resistor, a second resistor, a first capacitor and a first operational amplifier adjusting circuit; one end of the first resistor is electrically connected with the output end of the positive high-voltage module, and the other end of the first resistor is connected with the second resistor in series; the first capacitor is connected with the second resistor in parallel and is grounded; the voltage signal on the second resistor forms a detection signal of positive high-voltage direct current output through the first operational amplifier adjusting circuit;

the negative high-voltage detection unit comprises a third resistor, a fourth resistor, a second capacitor and a second operational amplifier adjusting circuit; one end of the third resistor is electrically connected with the output end of the negative high-voltage module, and the other end of the third resistor is connected with the fourth resistor in series; the second capacitor is connected with the fourth resistor in parallel and is grounded; and a voltage signal on the fourth resistor forms a detection signal of negative high-voltage direct current output through the second operational amplifier adjusting circuit.

7. The DC high voltage power supply according to claim 6, wherein the first resistor, the second resistor, the third resistor and the fourth resistor are high voltage non-inductive resistors, and the first resistor has a higher resistance than the second resistor and the third resistor has a higher resistance than the fourth resistor; the first capacitor and the second capacitor are filter capacitors.

8. The dc high voltage power supply according to claim 7, wherein the first resistor has a resistance 1000 times that of the second resistor, and the third resistor has a resistance 1000 times that of the fourth resistor.

9. The direct current high voltage power supply of claim 4, further comprising:

and the display module is electrically connected with the control module and used for displaying the amplitude values of the positive high-voltage direct current output and the negative high-voltage direct current output according to the detection signal.

10. The dc high voltage power supply of claim 1, further comprising:

and the infrared receiving module is electrically connected with the control module and used for receiving an infrared remote control signal so as to remotely control the control module.

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