CN218940958U

CN218940958U - High-voltage power supply driving circuit

Info

Publication number: CN218940958U
Application number: CN202222182819.7U
Authority: CN
Inventors: 何四喜
Original assignee: Shenzhen Hetaiyun Intelligent Technology Co ltd
Current assignee: Shenzhen Hetaiyun Intelligent Technology Co ltd
Priority date: 2022-08-17
Filing date: 2022-08-17
Publication date: 2023-04-28
Anticipated expiration: 2032-08-17

Abstract

The utility model discloses a high-voltage power supply driving circuit, which relates to the technical field of power supply application and comprises the following components: the device comprises an AC-DC voltage reduction circuit, various voltage reference circuits, a voltage stabilizing circuit, an MCU control circuit, a high-voltage start-stop control circuit, a ZVS voltage boosting circuit, a voltage-current feedback circuit, a sectional current setting circuit, a sectional voltage setting circuit and a sampling circuit. The utility model relates to an intelligent accurate control's high voltage output power supply circuit for traditional high voltage dust removal power supply can be by accurate control output voltage and electric current, make the output that can stage accurate timing control voltage and electric current, thereby can be applied to high voltage striking arc current voltage needs by accurate control field and high accuracy, intelligent high voltage power supply application field, this application can realize inside outside voltage automatic adjustment, optimize the energy consumption, realize accurate control's advantage, simultaneously because control loop is short, controlled, the component is few, the price/performance ratio obtains very big promotion.

Description

High-voltage power supply driving circuit

Technical Field

The utility model relates to the technical field of power supply application, in particular to a high-voltage power supply driving circuit.

Background

The application field of high-voltage power supply has developed through years, the common high-voltage power supply technology has developed, but along with the increasing requirements on products, the reliability, the high precision and the intelligence are high, and the high cost performance has become an urgent real demand and is also an important research direction.

Disclosure of Invention

The present utility model is directed to a high voltage power supply driving circuit, which solves the above-mentioned problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a high voltage power supply drive circuit comprising: an AC-DC step-down circuit, a plurality of voltage reference circuits, a voltage stabilizing circuit, an MCU control circuit, a high voltage start-stop control circuit, a ZVS step-up circuit, a voltage-current feedback circuit, a sectional current setting circuit, a sectional voltage setting circuit and a sampling circuit,

the output end of the AC-DC voltage reduction circuit is respectively connected with the input ends of the various voltage reference circuits, the input end of the voltage stabilizing circuit and the power supply input end of the ZVS voltage boosting circuit, and the feedback input end of the AC-DC voltage reduction circuit is respectively connected with the output ends of the various voltage reference circuits and the output end of the voltage current feedback circuit;

the voltage setting ends of the various voltage reference circuits are connected with the output ends of the high-voltage start-stop control circuit;

the output end of the voltage stabilizing circuit is connected with the power input end of the MCU control circuit;

the signal input end of the MCU control circuit is connected with the output end of the sampling circuit, the output 1 end of the MCU control circuit is connected with the input end of the high-voltage start-stop control circuit, the output 2 end of the MCU control circuit is connected with the input end of the sectional current setting circuit, and the output 3 end of the MCU control circuit is connected with the input end of the sectional voltage setting circuit;

the output end of the high-voltage start-stop control circuit is connected with the GND end of the ZVS boost circuit;

the current feedback setting end of the ZVS boosting circuit is connected with the output end of the segmentation current setting circuit, and the voltage feedback setting end of the ZVS boosting circuit is connected with the output end of the segmentation voltage setting circuit;

the current input end of the voltage-current feedback circuit is connected with the current feedback end of the segmented current setting circuit, and the voltage input end of the voltage-current feedback circuit is connected with the voltage feedback end of the segmented voltage setting circuit;

the input end of the sampling circuit is connected with the voltage feedback setting end of the ZVS boost circuit.

As a further scheme of the utility model: the AC-DC voltage reduction circuit comprises an AC line CN1, wherein an ACL end of the AC line CN1 is connected with one end of a fuse F1, an ACN end of the AC line CN1 is connected with one end of a piezoresistor RV1, one end of an X capacitor CX1 and an AC second input end of a bridge pile BD1, the other end of the fuse F1 is connected with the other end 1 of the piezoresistor RV, the other end of the X capacitor CX1 and the AC first input end of the bridge pile BD1, the cathode of the bridge pile BD1 is grounded, the anode of the bridge pile BD1 is connected with the anode end of an electrolytic capacitor EC1, a capacitor C1, a resistor R1 and the first end of a transformer T1, the other end of the electrolytic capacitor EC1 is grounded, the other end of the capacitor C1 is connected with the other end of the resistor R1, the other end of the resistor R1 is connected with a resistor R2, and the other end of the resistor R2 is connected with the cathode of a diode D5, the anode of the diode D5 is connected with the 5 pins of the power driving chip U1, the 6 pins of the power driving chip U1, the 7 pins of the power driving chip U1, the 8 pins of the power driving chip U1 and the 3 rd end of the transformer T1, the 1 pins and the 2 pins of the power driving chip U1 are grounded, the 4 pins of the power driving chip U1 are connected with the output ends of the electrolytic capacitor EC4 and various voltage reference circuits, the other end of the electrolytic capacitor EC4 is grounded, the 3 pins of the power driving chip U1 are connected with the output ends of various voltage reference circuits, the 10 th end of the transformer T1 is connected with the anode of the diode D1, the cathode of the diode D1 is connected with the electrolytic capacitor EC2, the TVS1 pipe and the power VDD end, and the 8 th end of the electrolytic capacitor EC2 and the other end of the TVS1 pipe are grounded.

As still further aspects of the utility model: the voltage reference circuit comprises a voltage stabilizing diode D6, the cathode of the voltage stabilizing diode D6 is connected with a power supply VDD, the anode of the voltage stabilizing diode D6 is connected with a resistor R7, the other end of the resistor R7 is connected with a resistor R12 and the 1 pin of an optocoupler U2, the 2 pin of the optocoupler U2 is connected with the other end of the resistor R12, the output end of a voltage current feedback circuit and the diode D7, the 4 pin of the optocoupler U2 is connected with the 4 pin of a power supply driving chip U1, the 3 pin of the optocoupler U2 is connected with the 3 pin of the power supply driving chip U1, the other end of the diode D7 is connected with the output end of a resistor R24 and a voltage reference IC U3, the other end of the resistor R24 is connected with a capacitor C8, the other end of the C8 is connected with the resistor R23, the resistor R33 and the sampling end of the voltage reference IC U3, the other end of the resistor R23 is connected with the power supply VDD, the other end of the resistor R34 is grounded, and the other end of the resistor R33 is connected with the other end of the voltage reference IC 3 is connected with the GND 8, and the output end of the diode D8 is connected with a high voltage control circuit.

As still further aspects of the utility model: the voltage stabilizing circuit comprises a resistor R36, one end of the resistor R36 is connected with a power supply VDD, the other end of the resistor R36 is connected with a diode D9 and a capacitor C9, the other end of the diode D9 is connected with an electrolytic capacitor EC5 and a 3 pin of a voltage stabilizing IC U4, a 2 pin of the voltage stabilizing IC U4 is connected with an electrolytic capacitor EC6, a capacitor C10 and a power supply VCC, and the other ends of the capacitor C9, the electrolytic capacitor EC5, the 1 pin of the voltage stabilizing IC U4, the electrolytic capacitor EC6 and the capacitor C10 are grounded.

As still further aspects of the utility model: the MCU control circuit comprises a capacitor C15, one end of the capacitor C15 is grounded, the other end of the capacitor C15 is connected with a power supply VCC, a TVS4 and an 18 pin of the single chip microcomputer U8, the other end of the TVS4 is grounded, 13 pins, 11 pins, 10 pins, 1 pin, 2 pins and 8 pins of the single chip microcomputer U8 are grounded, and the single chip microcomputer U8 is connected with a high-voltage start-stop control circuit, a segmentation current setting circuit, a segmentation voltage setting circuit, a sampling circuit and a voltage stabilizing circuit.

As still further aspects of the utility model: the high-voltage start-stop control circuit comprises a resistor R13, the resistor R13 is connected with a 9 pin of a singlechip U8, the other end of the resistor R13 is connected with a resistor R16 and a triode Q4, the other end of the resistor R16 is grounded, the E pole of the triode Q4 is grounded, the C pole of the triode Q4 is connected with a resistor R14, a resistor R8 and the G pole of a MOS tube Q3, the other end of the resistor R14 is grounded, the other end of the resistor R8 is connected with a power supply VDD, the S pole of the MOS tube Q3 is grounded, and the D pole of the MOS tube Q3 is connected with various voltage reference circuits and ZVS boosting circuits.

As still further aspects of the utility model: the ZVS boost circuit comprises an electrolytic capacitor EC3, the electrolytic capacitor EC3 is connected with a diode D1 and an inductor L1, the other end of the inductor L1 is connected with a resistor R3, a resistor R5 and a center tap 3 pin of a transformer TF1, the other end of the resistor R3 is connected with a power auxiliary winding 6 pin of the transformer TF1 and a base electrode of a triode Q1, the other end of the electrolytic capacitor EC3 is connected with various voltage reference circuits, a high-voltage start-stop circuit, an emitter electrode of the triode Q1 and an emitter electrode of the triode Q2, a collector electrode of the triode Q1 is connected with a capacitor C4 and a 5 pin of the transformer TF1, the other end of the resistor R5 is connected with a base electrode of the triode Q2 and a resistor R6, the collector electrode of the triode Q2 is connected with the other end of the capacitor C4 and a 2 pin of the transformer TF1, the high-voltage winding 7 pin of the transformer TF1 is connected with a capacitor C2 and a diode D4, the other end of the capacitor C2 is connected with the diode D2 and the other end of the diode D3, and the other end of the capacitor C3 is connected with the other end of the capacitor C3 and the diode C5 is connected with the other end of the capacitor C3 and the diode C4.

As still further aspects of the utility model: the voltage and current feedback circuit comprises a diode D10 and a diode D12, wherein the diode D10 and the diode D12 are connected to the other end of a resistor R12, the other end of the diode D10 is connected with a capacitor C11 and a pin 1 of an operational amplifier IC U5, the other end of the capacitor C11 is connected with a resistor R39, the other end of the resistor R39 is connected with a pin 2 of the operational amplifier IC U5 and a resistor R38, and the other end of the resistor R38 is connected with a segment voltage setting circuit; the other end of the diode D12 is connected with the 1 pin of the operational amplifier IC U7 and the capacitor C16, the other end of the capacitor C16 is connected with the resistor R45, the other end of the resistor R45 is connected with the 2 pin of the operational amplifier IC U7 and the resistor R43, the resistor R43 is connected with the segmented current setting circuit, the 4 pin of the operational amplifier IC U7 is grounded, the 8 pin of the operational amplifier IC U7 is connected with the power supply VDD and the capacitor C14, the other end of the capacitor C14 is grounded, the 3 pin of the operational amplifier IC U5 is connected with the resistor R35 and the resistor R34, the other end of the resistor R35 is connected with the power supply VDD, the other end of the resistor R40 is connected with the adjustable resistor VR2, the other end of the adjustable resistor VR2 is connected with the 3 pin of the active amplifier IC U7 and the resistor R44, and the resistor R44 is grounded.

As still further aspects of the utility model: the segmented current setting circuit comprises an HIB end, wherein the HIB end is connected with the other side of a resistor R43, the resistor HIB end is connected with a resistor R17, a resistor R18, a resistor R19, a resistor R20, a capacitor C7, a resistor R21, a resistor R22 and a resistor R9, the other end of the resistor R9 is connected with a TVS3 and a lead-out end LN2, the other ends of the resistor R22, the resistor R21 and the capacitor C7 are grounded, the other ends of the resistor R19 and the resistor R20 are connected with the D pole of a MOS tube Q6, the S pole of the MOS tube Q6 is grounded, the G pole of the MOS tube Q6 is connected with a resistor R28 and a resistor R27, the other end of the resistor R28 is grounded, the other end of the resistor R27 is connected with the 3 pin of a singlechip U8, the other ends of the resistor R18 and the resistor R17 are connected with the D pole of a MOS tube Q5, the G pole of the MOS tube Q5 is grounded, the other ends of the MOS tube Q25 and the other end of the resistor R26 are grounded, and the other end of the resistor R25 is connected with the singlechip U8;

the sectional voltage setting circuit comprises an HVB end, the HVB end is connected with the other side of the resistor R38, the HVB end is connected with an inductor L2, the other end of the inductor L2 is connected with a TVS2, an adjustable resistor VR1, a resistor R4, a resistor R10, a resistor R11 and a capacitor C6, the other end of the resistor R4 is connected with a diode D2 and a leading-out end LN1, the other end of the TVS2 is grounded, the other end of the adjustable resistor VR1 is connected with a resistor R15, the other end of the resistor R15 is grounded, the other end of the resistor R10 is connected with a D electrode of a MOS tube Q7, the S electrode of the MOS tube Q7 is grounded, the G electrode of the MOS tube Q7 is connected with a resistor R29 and a resistor R30, the other end of the resistor R30 is grounded, the other end of the resistor R29 is connected with a pin 6 of a single chip microcomputer U8, the other end of the resistor R11 is connected with a D electrode of the MOS tube Q8, the S electrode of the MOS tube Q8 is grounded, the other end of the MOS tube Q8 is connected with a G electrode of the resistor R32 and the resistor R31 is connected with the other end of the single chip microcomputer U31.

As still further aspects of the utility model: the sampling circuit comprises a resistor R42, one end of the resistor R42 is connected with an HVB end, the other end of the resistor R42 is connected with a capacitor C13, a diode D11 and a resistor R41, the other ends of the capacitor C13 and the diode D11 are grounded, and the other end of the resistor R41 is connected with a capacitor C12 and a 12 pin of the singlechip U8.

Compared with the prior art, the utility model has the beneficial effects that: the utility model relates to an intelligent accurate control's high voltage output power supply circuit for traditional high voltage dust removal power supply can be by accurate control output voltage and electric current, make the output that can stage accurate timing control voltage and electric current, thereby can be applied to high voltage striking arc current voltage needs by accurate control field and high accuracy, intelligent high voltage power supply application field, this application can realize inside outside voltage automatic adjustment, optimize the energy consumption, realize accurate control's advantage, simultaneously because control loop is short, controlled, the component is few, the price/performance ratio obtains very big promotion.

Drawings

Fig. 1 is a functional schematic diagram of a high voltage power supply driving circuit.

Fig. 2 is a schematic diagram of an AC-DC step-down circuit in a high voltage power supply drive circuit.

Fig. 3 is a schematic diagram of various voltage reference circuits in a high voltage power supply drive circuit.

Fig. 4 is a schematic diagram of a voltage stabilizing circuit in the high-voltage power supply driving circuit.

Fig. 5 is a schematic diagram of an MCU control circuit in a high-voltage power supply driving circuit.

Fig. 6 is a schematic diagram of a high voltage start-stop control circuit in the high voltage power supply driving circuit.

Fig. 7 is a schematic diagram of ZVS boost circuit in high voltage power supply drive circuit.

Fig. 8 is a schematic diagram of a voltage-current feedback circuit in a high-voltage power supply driving circuit.

Fig. 9 is a schematic diagram of a segment current setting circuit in a high voltage power supply driving circuit.

Fig. 10 is a schematic diagram of a segment voltage setting circuit in a high voltage power supply driving circuit.

FIG. 11 is a schematic diagram of a sampling circuit in a high voltage power supply driving circuit.

Fig. 12 is a schematic diagram of the overall structure of the high-voltage power supply driving circuit.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 12, in the embodiment of the present utility model, a high voltage power supply driving circuit, an AC-DC voltage reducing circuit 1, a plurality of voltage reference circuits 2, a voltage stabilizing circuit 3, an mcu control circuit 4, a high voltage start-stop control circuit 5, a zvs voltage boosting circuit 6, a voltage current feedback circuit 7, a segment current setting circuit 8, a segment voltage setting circuit 9, and a sampling circuit 10.

The output end of the AC-DC voltage reduction circuit 1 is connected with the input ends of various voltage reference circuits 2, the output end of the AC-DC voltage reduction circuit 1 is connected with the input end of the voltage stabilizing circuit, the output end of the AC-DC voltage reduction circuit 1 is connected with the power input end of the ZVS voltage increasing circuit 6, and the feedback input end of the AC-DC voltage reduction circuit 1 is connected with the output ends of various voltage reference circuits 2. The input end of the various voltage reference circuits 2 is connected with the output end of the AC-DC voltage reduction circuit 1, the output end of the various voltage reference circuits 2 is connected with the feedback input end of the AC-DC voltage reduction circuit 1, the voltage setting 1 end of the various voltage reference circuits 2 is connected with the output end of the high-voltage start-stop control circuit 5, and the voltage setting 2 end of the various voltage reference circuits 2 is connected with the output end of the voltage current feedback circuit 7. The input end of the voltage stabilizing circuit 3 is connected with the output end of the AC-DC voltage reducing circuit 1, and the output end of the voltage stabilizing circuit 3 is connected with the power input end of the MCU control circuit 4. The power input end of the MCU control circuit 4 is connected with the output end of the voltage stabilizing circuit, the signal input end of the MCU control circuit 4 is connected with the output end of the sampling circuit, the output 1 end of the MCU control circuit 4 is connected with the input end of the high-voltage start-stop control circuit 5, the output 2 end of the MCU control circuit 4 is connected with the input end of the sectional current setting circuit 8, and the output 3 end of the MCU control circuit 4 is connected with the input end of the sectional voltage setting circuit 8. The input end of the high-voltage start-stop control circuit 5 is connected with the output 1 end of the MCU control circuit 4, the output end of the high-voltage start-stop control circuit 5 is connected with the voltage setting ends of the various voltage reference circuits 2, and the output end of the high-voltage start-stop control circuit 5 is connected with the GND ground end of the ZVS boost circuit 6. The power input end of the ZVS boosting circuit 6 is connected with the output end of the AC-DC voltage reducing circuit 1, the GND ground end of the ZVS boosting circuit 6 is connected with the output end of the high-voltage start-stop control circuit 5, the current feedback setting end of the ZVS boosting circuit 6 is connected with the output end of the sectional current setting circuit 8, and the voltage feedback setting end of the ZVS boosting circuit 6 is connected with the output end of the sectional voltage setting circuit 8. The current input end of the voltage-current feedback circuit 7 is connected with the current feedback end of the sectional current setting circuit 8, the electric voltage input end of the voltage-current feedback circuit 7 is connected with the voltage feedback end of the sectional voltage setting circuit, and the output end of the voltage-current feedback circuit 7 is connected with the voltage setting 2 ends of the various voltage reference circuits 2. The input end of the sectional current setting circuit 8 is connected with the output 2 end of the MCU control circuit 4, the current feedback end of the sectional current setting circuit 8 is connected with the current input end of the voltage current feedback circuit, and the output end of the sectional current setting circuit 8 is connected with the current feedback setting end of the ZVS boost circuit 6. The input end of the sectional voltage setting circuit 9 is connected with the output 3 end of the MCU control circuit 4, the current feedback end of the sectional voltage setting circuit 9 is connected with the voltage input end of the voltage current feedback circuit 7, and the output end of the sectional voltage setting circuit 9 is connected with the voltage feedback setting end of the ZVS boost circuit 6. The input end of the sampling circuit 10 is connected with the voltage feedback setting end of the ZVS boost circuit 6, and the output end of the sampling circuit 10 is connected with the signal input end of the MCU control circuit 4. In the application, a controllable and variable power supply is provided for a subsequent circuit by utilizing an AC-DC voltage reduction circuit 1, wherein the output voltage and current are regulated and controlled by an MCU control circuit 4 and a rear load, the output power supply is fed back to the AC-DC voltage reduction circuit 1 through a plurality of voltage reference circuits 2, so that the AC-DC voltage reduction circuit 1 provides an initial working voltage, wherein the initial working voltage supplies power to the MCU control circuit 4 through a voltage stabilizing circuit 3 and simultaneously supplies power to a ZVS voltage reduction circuit 6, the ZVS voltage reduction circuit 6 works, an accurate high-voltage value in a range of 5000-6000V is output, a sampling voltage value is set through a segmentation voltage setting circuit 9 and a corresponding voltage sampling value is output, one path of the corresponding voltage sampling value is input to the sampling circuit 10 after the sampling circuit 10 integrates and limiting values, the MCU control circuit 4 is enabled to enable the MCU control circuit 4 to set up a corresponding voltage according to a preset decision of a user or not, the corresponding voltage sampling value is set through a segmentation voltage setting circuit 9, the corresponding voltage sampling value is output to the other path of the AC-DC voltage reduction circuit 1 through a voltage feedback circuit 7 in comparison with a reference, the difference is output to the plurality of voltage reference circuits 2, and the difference is corrected by the AC-DC voltage reference circuit 1. A voltage closed loop control is formed, and the current closed loop control consists of a segmented current setting circuit 8, a voltage current feedback circuit 7, a plurality of voltage reference circuits 2 and an AC-DC voltage reduction circuit 1. The MCU control circuit 4 adjusts current setting through the sectional current setting circuit 8, sets voltage through the sectional voltage setting circuit 9, and controls the start and stop of the ZVS boost circuit 6 through the high-voltage start and stop control circuit 5.

As a further embodiment of the present application, please refer to fig. 1,2 and 12, wherein the AC-DC voltage reduction circuit 1 comprises an AC line CN1, wherein the ACL end of the AC line CN1 is connected to the first end of a fuse F1, the second end of the fuse F1 is connected to the first end of a varistor RV1, the second end of the fuse F1 is simultaneously connected to the AC first input end of a bridge stack BD1, the ACN end of the AC line CN1 is connected to the second end of the varistor RV1, the ACN end of the AC line CN1 is connected to the AC second input end of the bridge stack BD1, the X capacitor CX1 is connected in parallel with the varistor RV1, the anode end of the bridge stack BD1 is connected to the anode end of an electrolytic capacitor EC1, the anode end of the bridge stack BD1 is simultaneously connected to the first end of a capacitor C2, the first end of a transformer T1, the cathode of the electrolytic capacitor EC1 is connected to the high voltage ground end of the HGND, the capacitor C2 is connected in parallel with the resistor R1, the second end of the resistor R2 is connected to the cathode of the diode D5, the anode of the diode D5 is connected with the 5-8 pins of the electric power driving chip U1, the anode of the diode D5 is simultaneously connected to the 3 end of the transformer, the 1,2 pins of the electric power driving chip U1 are connected to the high-voltage ground end of the HGND, the 3 pin of the electric power driving chip U1 is an FB signal feedback input end and is connected to the output end of the various voltage reference circuits 2, the 4 pin power end of the electric power driving chip U1 is connected with the anode of the electrolytic capacitor EC4 and is also connected to the output end of the various voltage reference circuits 2, the cathode of the electrolytic capacitor EC4 is connected with the high-voltage ground end of the HGND, the 10 pin of the transformer is connected with the anode of the diode D1, the 8 pin of the transformer T1 is connected with the ground end of the GND, the cathode of the diode D1 is connected with the anode of the electrolytic capacitor, the cathode of the electrolytic capacitor is the DC positive end VDD, the cathode of the electrolytic capacitor EC2 is connected with the GND ground end, the TVS1 tube is connected in parallel with an electrolytic capacitor, and the anode of the electrolytic capacitor is connected with the ZVS booster circuit 6, the voltage stabilizing circuit 3 and the various voltage reference circuits 2 at the same time

As a further embodiment of the present application, please refer to fig. 1, 3 and 12, wherein the various voltage reference circuits 2 include a zener diode D6, the cathode of the zener diode D6 is connected to the DC positive terminal VDD, the anode of the zener diode D6 is connected to the first terminal of a resistor R7, the second terminal of the resistor R7 is connected to the 1 pin of an optocoupler U2, the 2 pin of the optocoupler U2 is connected to the anode of the diode D7, the output terminal of the voltage current feedback circuit 7, the resistor R12 is connected in parallel to the 1 pin and 2 pin of the optocoupler U2, the cathode of the diode D7 is connected to the output terminal of the voltage reference IC U3, the cathode of the diode D7 is simultaneously connected to the first terminal of a resistor R24, the second terminal of the resistor R24 is connected to the first terminal of a capacitor C8, the second terminal of the capacitor C8 is connected to the second terminal of a resistor R23, the first terminal of a resistor R33, the first terminal of a voltage reference IC 3 is connected to the sampling terminal of the voltage reference IC U3, the GND ground terminal of the voltage reference IC U3 is connected to the GND ground terminal of the voltage reference IC 3, the voltage dropping terminal of the resistor R4 is connected to the voltage dropping terminal of the resistor R34, the voltage reference IC 3 is connected to the DC positive terminal of the resistor U4, the DC positive terminal of the resistor 1 is connected to the DC positive terminal of the resistor 2, the resistor 2 is connected to the DC positive terminal of the resistor 3, the resistor 1 is connected to the positive terminal of the resistor 2, the positive terminal of the resistor 2 is connected to the resistor 2

As a further embodiment of the present application, please refer to fig. 1, 4 and 12, wherein the voltage stabilizing circuit 3 comprises a resistor R36, a first end of the resistor R36 is connected with the DC positive terminal VDD, a first end of the resistor R36 is connected with a first end of a capacitor C9, an anode of a diode D9 is connected with a second end of the capacitor C9 is connected with the GND ground terminal, a cathode of the diode D9 is connected with an anode of an electrolytic capacitor EC5, a VIN terminal of a voltage stabilizing IC U4, a cathode of the electrolytic capacitor EC5 is connected with the GND ground terminal, a GND terminal of the voltage stabilizing IC U4 is connected with the GND ground terminal, a voltage output OUT terminal of the voltage stabilizing IC U4 is connected with an anode of an electrolytic capacitor EC6, a cathode of the electrolytic capacitor EC6 is connected with the GND ground terminal, a capacitor C10 is connected in parallel with the electrolytic capacitor EC6, and a voltage output OUT terminal of the voltage stabilizing IC U4 is connected to a power supply terminal of the MCU control circuit 4

As a further embodiment of the present application, please refer to fig. 1, 5 and 12, wherein the MCU control circuit 4 includes a capacitor C15, a first end of the capacitor C15 is connected to a power VCC, a second end of the capacitor C15 is connected to the GND ground, the TVS4 is connected in parallel to the capacitor C15, a VDD power end of the MCU U8MCU is connected to the power VCC, and the MCU is connected to the high voltage start-stop control circuit 5, the segment current setting circuit 8, the segment voltage setting circuit 9, the sampling circuit 10 and the voltage stabilizing circuit 3

As a further embodiment of the present application, please refer to fig. 1, 6 and 12, wherein the high voltage start-stop control circuit 5 includes a resistor R13, a first end of the resistor R13 is connected to the MCU control circuit 4, a second end of the resistor R13 is connected to a first end of the resistor R16, a B pole of the transistor Q4 is connected to the GND ground, an E pole of the transistor Q4 is connected to the GND ground, a C pole of the transistor Q4 is connected to a second end of the resistor R8, a first end of the resistor R14, a G end of the MOS transistor Q3, a first end of the resistor R8 is connected to the DC power supply VDD, a second end of the resistor R14 is connected to the GND ground, an S pole of the MOS transistor Q3 is connected to the GND ground, a D pole of the MOS transistor Q3 is connected to the various voltage reference circuits 2, the ZVS boost circuit 6

As a further embodiment of the present application, please refer to fig. 1, 7 and 12, wherein the ZVS boost circuit 6 comprises an electrolytic capacitor EC3, the anode of the electrolytic capacitor EC3 is connected to the DC power supply VDD, the cathode of the electrolytic capacitor EC3 is connected to the signal ground, the first end of the inductor L1 is connected to the DC power supply VDD, the second end of the inductor L1 is connected to the center tap 3 pin of the transformer TF1, the first end of the resistor R3, the first end of the resistor R5, the second end of the resistor R3 is connected to the power auxiliary winding 6 pin of the transformer TF1, the base of the transistor Q1, the second end of the resistor R5 is connected to the first end of the resistor R6, the base of the transistor Q2, the second end of the resistor R6 is connected to the 1 pin of the transformer TF1, the high-voltage winding 8 pin of the transformer TF1 is connected to the GND ground end, the high-voltage winding 7 pin of the transformer TF1 is connected to the anode of the boost diode D4 and the first end of the boost capacitor C2, the cathode of the boost diode is connected with the first end of the capacitor C5, the anode of the diode D3 and the second end of the boost capacitor C3, the second end of the capacitor C5 is connected with the GND ground end, the cathode of the diode D3 is connected with the second end of the boost capacitor C2 and the anode of the boost diode D2, the cathode of the diode D2 is connected with the first end of the boost capacitor C3, the cathode end of the D2 is the high-voltage HV end, and the cathode end of the D2 is connected with the input end of the segment voltage setting circuit 9

As a further embodiment of the present application, please refer to fig. 1, 8 and 12, wherein the voltage-current feedback circuit 7 includes a resistor R38, a first end of the resistor R38 is connected to the split voltage setting circuit, a second end of the resistor R38 is connected to the negative input terminal 2 of the operational amplifier IC U5 and one end of the resistor R39, a second end of the resistor R39 is connected to the first end of the capacitor C11, a second end of the capacitor C11 is connected to the output terminal 1 of the operational amplifier IC U5 and the cathode of the diode D10, a positive input terminal 3 of the operational amplifier IC U5 is connected to the second end of the resistor R35 and the first end of the resistor R40, a first end of the resistor R35 is connected to the DC power supply VDD terminal, a second end of the resistor R40 is connected to the first end of the VR2, a second end of the resistor R2 is connected to the adjustable input terminal of the operational amplifier U5 and the first end of the resistor R44, a second end of the resistor R44 is connected to the GND ground terminal, a first end of the resistor R43 is connected to the segment current setting circuit 8, a second end of the resistor R43 is connected to the second end of the output terminal 1 of the operational amplifier IC U5, a cathode of the diode D10, a positive input terminal 3 of the resistor R35 is connected to the resistor R35 and a second end of the resistor R40 is connected to the resistor R16, a first end of the resistor 12 is connected to the capacitor C14, a voltage-capacitor 12 is connected to the capacitor C12, a voltage-2 is connected to the positive terminal 12, a voltage-end of the capacitor 12, a voltage-capacitor is connected to the capacitor 2, and a voltage-capacitor

As a further embodiment of the present application, please refer to fig. 1, 9, 10 and 12, wherein the segmented current setting circuit 8 comprises a high-voltage negative output line LN2, the first end of the high-voltage negative output line LN2 is connected to the power output load, the second end of the high-voltage negative output line LN2 is connected to the first end of the resistor R9, the first end of the transient protection diode TVS3 is connected to the GND terminal, the second end of the resistor R9 is connected to the first end of the resistor R17, the first end of the resistor R18, the first end of the resistor R19, the first end of the resistor R20, the first end of the resistor R21, the first end of the resistor R22, the first end of the capacitor C7, the current input end of the voltage current feedback circuit 7, the second end of the C7 is connected to the GND terminal, the resistor R21 and the capacitor C7 are connected in parallel, the second end of the resistor R19 is connected to the D terminal of the MOS transistor Q6, the resistor R19 and the resistor R20 are connected in parallel, the G of the MOS transistor Q6 is connected to the second end of the resistor R27, the second end of the resistor R28 is connected to the resistor R28, the second end of the MOS transistor Q26 is connected to the GND terminal of the resistor R26 and the resistor R5 is connected to the GND terminal, the second end of the resistor 26 is connected to the second end of the resistor 5, the resistor R26 is connected to the second end of the resistor 7, the resistor 7 is connected to the resistor 7, and the resistor is connected to the D

The segment voltage setting circuit 9 comprises a high-voltage positive output line LN1, a power output load is connected to a first end of the high-voltage positive output line LN1, a first end of a resistor R10 is connected to a second end of the high-voltage positive output line LN1, a first end of a resistor R11, a first end of a potentiometer VR1, a first end of a capacitor C6, a first end of a transient protection diode TVS2, a first end of an inductor L2, a second end of the inductor L2 is connected to an input end of the sampling circuit 10, a voltage input end of a voltage current feedback circuit 7, a second end of the transient protection diode TVS2 is connected to the GND end, the transient protection diode TVS2 is connected to the capacitor C6 in parallel, a second end of the potentiometer VR1 is connected to an adjustable end, a second end of the potentiometer VR1 is connected to a first end of a resistor R15, a second end of the resistor R15 is connected to the GND end, a second end of the resistor R11 is connected to a D electrode of a MOS transistor Q8, a S electrode of the MOS transistor Q8 is connected to the GND end of the MOS transistor Q8, a G end of the MOS transistor Q8 is connected to the GND end of the MOS transistor Q8, a resistor R32 is connected to the resistor R31, a resistor R32 is connected to the resistor R32, a voltage end of the MOS transistor R29 is connected to the R29, a voltage end of the MCU 7 is connected to the R4, a voltage control end of the resistor R10 is connected to the output end of the resistor

As a further embodiment of the present application, please refer to fig. 1, 11 and 12, wherein the sampling circuit 10 includes a resistor R42, a first end of the resistor R42 is connected with the segment voltage setting circuit 9, a second end of the resistor R42 is connected with a first end of a capacitor C13, a first end of a resistor R41, a cathode of a zener diode D11, a second end of the capacitor C13 is connected with the GND ground, the capacitor C13 is connected in parallel with the diode D11, a second end of the resistor R41 is connected with a first end of the capacitor C12, a voltage input detection end of the MCU control circuit 4

The working principle of the utility model is as follows: the AC-DC voltage reducing circuit provides a controllable and variable power supply for a subsequent circuit, and the output voltage and the output current are regulated and controlled by the singlechip U8 and the rear-end load. The output power supply is rectified by the diode D1 and then fed back to the AC-DC voltage reduction circuit through various voltage reference circuits, so that the AC-DC voltage reduction circuit provides initial working voltage. The initial working voltage supplies power to the single chip microcomputer U8 through the voltage stabilizing circuit, meanwhile, the ZVS boosting circuit supplies power, the ZVS boosting circuit works and outputs an accurate high voltage value in the range of 5000-6000V, the sampling voltage value is set through the segmented voltage setting circuit, the corresponding voltage sampling value is output, one path of the corresponding voltage sampling value is supplied to the sampling circuit, the integral and the limit value of the sampling circuit are input into the MCU control circuit, and whether the current setting is adjusted through the segmented current setting circuit or the corresponding voltage is set through the segmented voltage setting circuit is judged by the MCU according to user preset; the other path of the corresponding voltage sampling value passes through a voltage and current feedback circuit, is compared with a reference, outputs the difference to various voltage reference circuits, and feeds back a difference control signal to an AC-DC voltage reduction circuit through an optocoupler by the various voltage reference circuits, so that the AC-DC voltage reduction circuit outputs corrected voltage and current. The voltage closed-loop control is formed, and the current closed-loop control consists of a segmented current setting circuit, a voltage current feedback circuit, a plurality of voltage reference circuits and an AC-DC voltage reduction circuit. The MCU control circuit adjusts current setting through the multi-section current setting circuit, sets voltage through the sectional voltage setting circuit, and controls the start and stop of the ZVS boost circuit through the high-voltage start and stop control circuit. When the voltage reference voltages normally work, the reference voltage IC U3 is set through the resistor R33, the diode D8 and the resistor R34, and when the transient arc-striking short circuit occurs or the load is overloaded, the voltage of the cathode of the photo-coupler diode is pulled down to GND by the voltage and current feedback circuit, the voltage stabilizing tube D6 ensures that the same photo-coupler forms normal voltage feedback, so that the AC-DC voltage reducing circuit outputs the normal working voltage of the singlechip U8. The corresponding control signal is output by the single chip microcomputer U8, whether the ZVS boosting circuit is closed or the voltage and current corresponding downshift is performed on the output is ensured, when the single chip microcomputer U8 is powered off by the high-voltage power-on/power-off circuit, the resistor R33 and the diode D8 stop working, and the output voltage of the AC-DC voltage-down circuit is reduced to the maintenance voltage of the single chip microcomputer U8. The internal and external voltage is automatically adjusted, the energy consumption is optimized, the precise control is realized, and the control loop is short, the control is controlled, the elements are few, and the cost performance is greatly improved.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. A high voltage power supply driving circuit, comprising: an AC-DC step-down circuit, a plurality of voltage reference circuits, a voltage stabilizing circuit, an MCU control circuit, a high voltage start-stop control circuit, a ZVS step-up circuit, a voltage-current feedback circuit, a sectional current setting circuit, a sectional voltage setting circuit and a sampling circuit,

the input end of the sampling circuit is connected with the voltage feedback setting end of the ZVS boost circuit;

the sampling circuit comprises a resistor R42, one end of the resistor R42 is connected with an HVB end, the other end of the resistor R42 is connected with a capacitor C13, a diode D11 and a resistor R41, the other ends of the capacitor C13 and the diode D11 are grounded, and the other end of the resistor R41 is connected with a capacitor C12 and a 12 pin of the singlechip U8.

2. The high voltage power supply driving circuit according to claim 1, wherein the AC-DC voltage reducing circuit comprises an AC line CN1, an ACL end of the AC line CN1 is connected to one end of a fuse F1, an ACN end of the AC line CN1 is connected to one end of a varistor RV1, one end of an X capacitor CX1 and an AC second input end of a bridge pile BD1, the other end of the fuse F1 is connected to the other end of the varistor RV1, the other end of the X capacitor CX1 and the AC first input end of the bridge pile BD1, a cathode of the bridge pile BD1 is grounded, an anode of the bridge pile BD1 is connected to an anode end of an electrolytic capacitor EC1, a capacitor C1, a resistor R1 and a first end of a transformer T1, the other end of the electrolytic capacitor EC1 is grounded, the other end of the capacitor C1 is connected to the other end of a resistor R1, the other end of the resistor R1 is connected to a resistor R2, the other end of the resistor R2 is connected to a cathode of a diode D5, the anode of the diode D5 is connected with the 5 pins of the power driving chip U1, the 6 pins of the power driving chip U1, the 7 pins of the power driving chip U1, the 8 pins of the power driving chip U1 and the 3 rd end of the transformer T1, the 1 pins and the 2 pins of the power driving chip U1 are grounded, the 4 pins of the power driving chip U1 are connected with the output ends of the electrolytic capacitor EC4 and various voltage reference circuits, the other end of the electrolytic capacitor EC4 is grounded, the 3 pins of the power driving chip U1 are connected with the output ends of various voltage reference circuits, the 10 th end of the transformer T1 is connected with the anode of the diode D1, the cathode of the diode D1 is connected with the electrolytic capacitor EC2, the TVS1 pipe and the power VDD end, and the 8 th end of the electrolytic capacitor EC2 and the other end of the TVS1 pipe are grounded.

3. The high voltage power supply driving circuit according to claim 2, wherein the various voltage reference circuits comprise a zener diode D6, a cathode of the zener diode D6 is connected to a power supply VDD, an anode of the zener diode D6 is connected to a resistor R7, the other end of the resistor R7 is connected to a resistor R12 and a 1 pin of an optocoupler U2, a 2 pin of the optocoupler U2 is connected to the other end of the resistor R12, an output end of a voltage and current feedback circuit and the diode D7, a 4 pin of the optocoupler U2 is connected to a 4 pin of the power supply driving chip U1, a 3 pin of the optocoupler U2 is connected to a 3 pin of the power supply driving chip U1, the other end of the diode D7 is connected to a resistor R24 and an output end of the voltage reference IC U3, the other end of the resistor R24 is connected to a capacitor C8, the other end of the C8 is connected to a resistor R23, a resistor R34, a resistor R33 and a sampling end of the voltage reference IC U3, a GND end of the other end of the voltage reference IC U3 is grounded, the other end of the resistor R23 is connected to the power supply VDD, the other end of the resistor R34 is connected to the other end of the resistor R33, and the other end of the resistor is connected to the diode D8 is connected to the high voltage control circuit.

4. The high voltage power supply driving circuit according to claim 3, wherein the voltage stabilizing circuit comprises a resistor R36, one end of the resistor R36 is connected with a power supply VDD, the other end of the resistor R36 is connected with a diode D9 and a capacitor C9, the other end of the diode D9 is connected with an electrolytic capacitor EC5 and 3 pins of a voltage stabilizing IC U4, 2 pins of the voltage stabilizing IC U4 are connected with an electrolytic capacitor EC6, a capacitor C10 and a power supply VCC, and the other ends of the capacitor C9, the electrolytic capacitor EC5, 1 pin of the voltage stabilizing IC U4, the electrolytic capacitor EC6 and the capacitor C10 are grounded.

5. The high-voltage power supply driving circuit according to claim 4, wherein the MCU control circuit comprises a capacitor C15, one end of the capacitor C15 is grounded, the other end of the capacitor C15 is connected with a power supply VCC, a TVS4 and 18 pins of a single chip microcomputer U8, the other end of the TVS4 is grounded, 13 pins, 11 pins, 10 pins, 1 pin, 2 pins and 8 pins of the single chip microcomputer U8 are grounded, and the single chip microcomputer U8 is connected with a high-voltage start-stop control circuit, a segmented current setting circuit, a segmented voltage setting circuit, a sampling circuit and a voltage stabilizing circuit.

6. The high-voltage power supply driving circuit according to claim 5, wherein the high-voltage start-stop control circuit comprises a resistor R13, the resistor R13 is connected with a 9 pin of the single chip microcomputer U8, the other end of the resistor R13 is connected with a resistor R16 and a triode Q4, the other end of the resistor R16 is grounded, the E pole of the triode Q4 is grounded, the C pole of the triode Q4 is connected with a resistor R14, a resistor R8 and the G pole of the MOS tube Q3, the other end of the resistor R14 is grounded, the other end of the resistor R8 is connected with a power supply VDD, the S pole of the MOS tube Q3 is grounded, and the D pole of the MOS tube Q3 is connected with various voltage reference circuits and ZVS boosting circuits.

7. The high voltage power supply driving circuit according to claim 6, wherein the ZVS boost circuit comprises an electrolytic capacitor EC3, the electrolytic capacitor EC3 is connected with a diode D1 and an inductor L1, the other end of the inductor L1 is connected with a resistor R3, a resistor R5 and a center tap 3 pin of a transformer TF1, the other end of the resistor R3 is connected with a power auxiliary winding 6 pin of the transformer TF1 and a base electrode of a triode Q1, the other end of the electrolytic capacitor EC3 is connected with various voltage reference circuits, a high voltage start-stop circuit, an emitter electrode of the triode Q1 and an emitter electrode of a triode Q2, a collector electrode of the triode Q1 is connected with a capacitor C4 and a 5 pin of the transformer TF1, the other end of the resistor R5 is connected with a base electrode of the triode Q2 and a resistor R6, the other end of the triode Q2 is connected with a 2 pin of the transformer TF1, the other end of the resistor R6 is connected with a high voltage winding 7 pin of the transformer TF1 is connected with a capacitor C2, a diode D4, the other end of the capacitor D2 is connected with a ground electrode of the diode D2, and the other end of the diode D3 is connected with a capacitor D2, and the other end of the diode D2 is connected with a capacitor D2.

8. The high-voltage power supply driving circuit according to claim 7, wherein the voltage-current feedback circuit comprises a diode D10 and a diode D12, the diode D10 and the diode D12 are connected to the other end of the resistor R12, the other end of the diode D10 is connected to a capacitor C11 and a pin 1 of the op-amp IC U5, the other end of the capacitor C11 is connected to a resistor R39, the other end of the resistor R39 is connected to a pin 2 of the op-amp IC U5 and a resistor R38, and the other end of the resistor R38 is connected to a segment voltage setting circuit; the other end of the diode D12 is connected with the 1 pin of the operational amplifier IC U7 and the capacitor C16, the other end of the capacitor C16 is connected with the resistor R45, the other end of the resistor R45 is connected with the 2 pin of the operational amplifier IC U7 and the resistor R43, the resistor R43 is connected with the segmented current setting circuit, the 4 pin of the operational amplifier IC U7 is grounded, the 8 pin of the operational amplifier IC U7 is connected with the power supply VDD and the capacitor C14, the other end of the capacitor C14 is grounded, the 3 pin of the operational amplifier IC U5 is connected with the resistor R35 and the resistor R34, the other end of the resistor R35 is connected with the power supply VDD, the other end of the resistor R40 is connected with the adjustable resistor VR2, the other end of the adjustable resistor VR2 is connected with the 3 pin of the active amplifier IC U7 and the resistor R44, and the resistor R44 is grounded.

9. The high voltage power supply driving circuit according to claim 5, wherein,

the segmented current setting circuit comprises an HIB end, wherein the HIB end is connected with the other side of a resistor R43, the resistor HIB end is connected with a resistor R17, a resistor R18, a resistor R19, a resistor R20, a capacitor C7, a resistor R21, a resistor R22 and a resistor R9, the other end of the resistor R9 is connected with a TVS3 and a lead-out end LN2, the other ends of the resistor R22, the resistor R21 and the capacitor C7 are grounded, the other ends of the resistor R19 and the resistor R20 are connected with the D pole of a MOS tube Q6, the S pole of the MOS tube Q6 is grounded, the G pole of the MOS tube Q6 is connected with a resistor R28 and a resistor R27, the other end of the resistor R28 is grounded, the other end of the resistor R27 is connected with the 3 pin of a singlechip U8, the other ends of the resistor R18 and the resistor R17 are connected with the D pole of a MOS tube Q5, the G pole of the MOS tube Q5 is grounded, the other ends of the MOS tube Q25 and the other end of the resistor R26 are grounded, and the other end of the resistor R25 is connected with the singlechip U8;