Miniature PWM (Pulse Width Modulation) direct-current pulse static elimination rod driving circuit

Abstract

The utility model discloses a miniature PWM direct current pulse static elimination rod driving circuit, the input end of a wide voltage input circuit is connected with an aviation plug interface 3P, the output end of the wide voltage input circuit is connected with a DC / DC voltage-multiplying driving voltage circuit, the output end of the DC / DC voltage-multiplying driving voltage circuit is connected with a voltage-multiplying PWM driving circuit and an LED indicating circuit, and the output end of the DC / DC voltage-multiplying driving voltage circuit is connected with an LED indicating circuit. The voltage-multiplying PWM driving circuit is connected with the positive voltage-multiplying switch driving circuit and the negative voltage-multiplying switch driving circuit, the positive voltage-multiplying switch driving circuit is connected with the positive voltage-multiplying output circuit, the negative voltage-multiplying switch driving circuit is connected with the negative voltage-multiplying output circuit, and the positive voltage-multiplying output circuit and the negative voltage-multiplying output circuit are respectively connected with the spray point. And the voltage-multiplying abnormal detection driving circuit is connected with the LED indicating circuit. According to the utility model, the PWM drive circuit is utilized to meet the requirements of customers, and the requirements of special machine, simple circuit, few devices and convenient disassembly and maintenance are met.

Description

Technical Field

[0001] The utility model relates to an electrostatic eliminator bar, in particular to a driving circuit of a micro PWM DC pulse electrostatic eliminator bar. Background Art

[0002] For special industries, in the case of limited space and a space range length of about 120 mm, the customer requirements are as follows:

[0003] The static elimination time requirement: at 30 mm, 1000 - 100V < 1S, at 50 mm, 1000 - 100V < 2S;

[0004] The static elimination balance requirement: ≤ ±100V (30 mm);

[0005] The driving frequency: 27HZ;

[0006] The driving duty cycle: positive high voltage drive 57%, negative high voltage 43%.

[0007] The current electrostatic eliminator bars work at a unified frequency. If the above customer requirements need to be adjusted, improvement is required, but the cost of improving on old devices is relatively high, and it is not convenient for subsequent disassembly and maintenance. Content of the Utility Model

[0008] To solve the defects of the above-mentioned existing technologies, the utility model provides a driving circuit of a micro PWM DC pulse electrostatic eliminator bar. The utility model uses a PWM driving circuit to meet the customer requirements, featuring dedicated use for special machines, simple circuit, few components, and convenient disassembly and maintenance.

[0009] To achieve the above technical objectives, the utility model adopts the following technical solutions: A driving circuit of a micro PWM DC pulse electrostatic eliminator bar, including a voltage multiplier PWM driving circuit, a positive voltage multiplier circuit, and a negative voltage multiplier circuit. The output end of the voltage multiplier PWM driving circuit is connected to the input ends of the positive voltage multiplier circuit and the negative voltage multiplier circuit; the output ends of the positive voltage multiplier circuit and the negative voltage multiplier circuit are used to connect to electrode needles.

[0010] The voltage multiplier PWM driving circuit includes a chip U1. The 1st pin of the chip U1 is grounded. The 2nd pin is connected to the first path of a capacitor C15, and the capacitor C15 is grounded. The 2nd pin is connected to the 6th pin in the second path, the 3rd path of the 2nd pin is connected to the negative electrode of a diode D9, the 4th path of the 2nd pin is connected to a resistor R4, the other end of the resistor R4 is connected to the positive electrode of the diode D9, the positive electrode of the diode D9 is connected to the 7th pin and a resistor R3, and the resistor R3 and the 8th pin are connected to H_VCC. The 3rd pin is connected to a resistor R5. The resistor R5 outputs a PWM_O square wave signal to the input ends of the positive voltage multiplier circuit and the negative voltage multiplier circuit. The resistor R5 is connected to a resistor R9, and the resistor R9 is grounded. The 4th pin is connected to H_VCC, and the 5th pin is connected to a capacitor C16, and the capacitor C16 is grounded.

[0011] The positive voltage multiplier circuit includes a positive voltage multiplier switch driving circuit, and the positive voltage multiplier switch driving circuit includes a capacitor C19. One end of the capacitor C19 is grounded, and the other end is connected to a resistor R10 and the source electrode of an MOS transistor Q6. The other end of the resistor R10 is connected to the gate electrode of the MOS transistor Q6 and the positive electrode of a diode D3. The drain electrode of the MOS transistor Q6 is connected to a parallel combination of a capacitor C20 and a resistor R11. After the capacitor C20 and the resistor R11 are connected in parallel, they are grounded. The negative electrode of the diode D3 is connected to the voltage multiplier PWM driving circuit to receive the PWM_O square wave signal.

[0012] The negative voltage multiplier circuit includes a negative voltage multiplier switch driving circuit, and the negative voltage multiplier switch driving circuit includes a capacitor C17. One end of the capacitor C17 is grounded, and the other end is connected to a resistor R6 and the source electrode of an MOS transistor Q5. The other end of the resistor R6 is connected to the gate electrode of the MOS transistor Q5 and a resistor R8. The drain electrode of the MOS transistor Q5 is connected to a parallel combination of a capacitor C18 and a resistor R7. After the capacitor C18 and the resistor R7 are connected in parallel, they are grounded. The resistor R8 is connected to the collector electrode of a triode Q7. The emitter electrode of the triode Q7 is grounded. The base electrode of the triode Q7 is connected to a resistor R12, and the resistor R12 is connected to the voltage multiplier PWM driving circuit to receive the PWM_O square wave signal.

[0013] It further includes a wide-voltage input circuit, which includes a capacitor C28, a capacitor C29, a diode D6, and a diode D7. The positive electrodes of the capacitor C28, the capacitor C29, and the diode D6 are connected to VIN_24V. The capacitor C28, the capacitor C29, and the diode D7 are connected in parallel. The negative electrode of the diode D6 is connected to the negative electrode of the diode D7 and outputs VCC. The other end of the capacitor C28, the other end of the capacitor C29, and the positive electrode of the diode D7 are grounded.

[0014] It further includes a DC / DC voltage multiplier driving voltage circuit, which includes a chip U2. The 5th pin of U2 is connected to VCC, a capacitor C25, a capacitor C23, and a resistor R19. After the capacitor C25 and the capacitor C23 are connected in parallel, they are grounded. The resistor R19 is connected to the 4th pin and EN. The 1st pin is connected to a capacitor C24. The capacitor C24 and the 6th pin are connected to an inductor L3. The other end of the inductor L3 outputs H_VCC. The 3rd pin is connected to a resistor R18, and the resistor R18 is connected to H_VCC. The 2nd pin is grounded on one path, connected to a resistor R20 on another path, and connected to a capacitor C26 on another path. The resistor R20 is connected to the 3rd pin, and the capacitor C26 is connected to H_VCC.

[0015] It further includes an LED indication circuit, which includes a connector J1. The 1st pin of the connector J1 is connected to a resistor R14, and the 3rd pin is connected to a resistor R17. The resistors R14 and R17 are connected to VCC. The 2nd pin is connected to P_EN, and the 4th pin is grounded.

[0016] It also includes a voltage doubler abnormality detection drive circuit, which includes diode D5, resistor R15, capacitor C21, diode D4, capacitor C22, resistor R13, resistor R16, and triode Q8. Diode D5, resistor R15, capacitor C21, capacitor C22, and resistor R16 are connected in parallel, and one end of the parallel connection is grounded, while the other end is connected to the base of triode Q8. The positive electrode of diode D4 is connected to the positive electrode of resistor R15, the negative electrode of diode D4 is connected to the positive electrode of capacitor C22, one end of resistor R13 is connected to the positive electrode of capacitor C22 and the other end is connected to the base of triode Q8. The emitter of triode Q8 is grounded, and the collector of triode Q8 is connected to P_EN.

[0017] In summary, the present utility model has achieved the following technical effects:

[0018] The present utility model adopts a PWM drive circuit and a small half-bridge drive circuit, with a simple circuit and few components;

[0019] The overall structure of the present utility model is designed, with a maximum size of 120 mm, meeting the requirements of special-purpose machines;

[0020] The relative position between the grounding plate and the discharge needle of the structure of the present utility model is accurately controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a block diagram of a micro PWM DC pulse static eliminator drive circuit;

[0022] Figure 2 It is a wide voltage input circuit;

[0023] Figure 3 It is a DC / DC voltage doubler drive voltage circuit;

[0024] Figure 4 It is a voltage doubler PWM drive circuit;

[0025] Figure 5 It is a positive voltage doubler switch drive circuit;

[0026] Figure 6 It is a negative voltage doubler switch drive circuit;

[0027] Figure 7 It is a positive voltage doubler output circuit;

[0028] Figure 8 It is a negative voltage doubler output circuit;

[0029] Figure 9 It is an LED indication circuit;

[0030] Figure 10 It is a voltage doubler abnormality detection drive circuit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0032] This specific embodiment is only an explanation of the present utility model and does not limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present utility model, it is protected by the Patent Law.

[0033] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0035] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0037] Embodiment:

[0038] Figure 1 It is a block diagram of a driving circuit for a micro PWM DC pulse static eliminator bar, including a voltage multiplier PWM driving circuit, a positive voltage multiplier circuit, and a negative voltage multiplier circuit. The output end of the voltage multiplier PWM driving circuit is connected to the input end of the positive voltage multiplier circuit and the input end of the negative voltage multiplier circuit. The output ends of the positive voltage multiplier circuit and the negative voltage multiplier circuit are used to connect the electrode needles. The positive voltage multiplier circuit includes a positive voltage multiplier switch driving circuit and a positive voltage multiplier output circuit, and the negative voltage multiplier circuit includes a negative voltage multiplier switch driving circuit and a negative voltage multiplier output circuit. It also includes a wide voltage input circuit, a DC / DC voltage multiplier driving voltage circuit, an LED indication circuit, and a voltage multiplier abnormal detection driving circuit.

[0039] The input end of the wide voltage input circuit is connected to the aviation plug interface 3P, the output end of the wide voltage input circuit is connected to the DC / DC voltage multiplier driving voltage circuit, the output end of the DC / DC voltage multiplier driving voltage circuit is connected to the voltage multiplier PWM driving circuit and the LED indication circuit, the voltage multiplier PWM driving circuit is connected to the positive voltage multiplier switch driving circuit and the negative voltage multiplier switch driving circuit, the positive voltage multiplier switch driving circuit is connected to the positive voltage multiplier output circuit, the negative voltage multiplier switch driving circuit is connected to the negative voltage multiplier output circuit, the positive voltage multiplier output circuit and the negative voltage multiplier output circuit are respectively connected to the discharge needles, and the voltage multiplier abnormal detection driving circuit is connected to the LED indication circuit.

[0040] Figure 2 It is a wide voltage input circuit, including capacitor C28, capacitor C29, diode D6, and diode D7. The positive electrodes of capacitor C28, capacitor C29, and diode D6 are connected to VIN_24V. Capacitor C28, capacitor C29, and diode D7 are in parallel. The negative electrode of diode D6 is connected to the negative electrode of diode D7 and outputs VCC. The other end of capacitor C28, the other end of capacitor C29, and the positive electrode of diode D7 are grounded.

[0041] The wide voltage input selects an input of 15 - 36V, and with reverse connection prevention processing, it ensures the stability of the input voltage.

[0042] Figure 3It is a DC / DC voltage multiplier driving voltage circuit, including chip U2. The 5th pin of U2 is connected to VCC, capacitor C25, capacitor C23, and resistor R19. Capacitor C25 and capacitor C23 are connected in parallel and then grounded. Resistor R19 is connected to the 4th pin and EN. The 1st pin is connected to capacitor C24. Capacitor C24 and the 6th pin are connected to inductor L3. The other end of inductor L3 outputs H_VCC. The 3rd pin is connected to resistor R18, and resistor R18 is connected to H_VCC. The 2nd pin is grounded on one path, connected to resistor R20 on another path, and connected to capacitor C26 on another path. Resistor R20 is connected to the 3rd pin, and capacitor C26 is connected to H_VCC. The VCC of the 5th pin comes from the wide voltage input circuit. The output H_VCC is 15.8V.

[0043] The DC / DC voltage multiplier driving voltage circuit is used for power input and output, and mainly outputs a 15.8V_1A voltage multiplier working voltage.

[0044] Figure 4 It is a voltage multiplier PWM driving circuit, including chip U1. The 1st pin of chip U1 is grounded. The 2nd pin is connected to capacitor C15 on the first path, capacitor C15 is grounded. The 2nd pin is connected to the 6th pin on the second path, connected to the negative electrode of diode D9 on the third path, and connected to resistor R4 on the fourth path. The other end of resistor R4 is connected to the positive electrode of diode D9. The positive electrode of diode D9 is connected to the 7th pin and resistor R3. Resistor R3 and the 8th pin are connected to H_VCC. The 3rd pin is connected to resistor R5. Resistor R5 outputs the PWM_O square wave signal to the input ends of the positive voltage multiplier circuit and the negative voltage multiplier circuit. Resistor R5 is connected to resistor R9, and resistor R9 is grounded. The 4th pin is connected to H_VCC. The 5th pin is connected to capacitor C16, and capacitor C16 is grounded. H_VCC comes from the DC / DC voltage multiplier driving voltage circuit. The PWM_O square wave signal is used to control the positive voltage multiplier switch driving circuit and the negative voltage multiplier switch driving circuit.

[0045] The voltage multiplier PWM driving circuit is used to output a square wave driving circuit with a frequency of 27HZ and a duty cycle of 57:43.

[0046] Figure 5 It is a positive voltage multiplier switch driving circuit, including capacitor C19. One end of capacitor C19 is grounded, and the other end is connected to resistor R10 and the source electrode of MOS tube Q6. The other end of resistor R10 is connected to the gate electrode of MOS tube Q6 and the positive electrode of diode D3. The drain electrode of MOS tube Q6 is connected to the parallel-connected capacitor C20 and resistor R11. Capacitor C20 and resistor R11 are connected in parallel and then grounded. The negative electrode of diode D3 is connected to the voltage multiplier PWM driving circuit to receive the PWM_O square wave signal. The PWM_O square wave signal comes from the voltage multiplier PWM driving circuit. The drain electrode of MOS tube Q6 outputs P_VCC to the positive voltage multiplier output circuit.

[0047] The positive voltage multiplier switch driving circuit is used to output voltage multiplication power supply according to the PWM duty cycle.

[0048] Figure 6 It is a negative voltage multiplier switch drive circuit, including capacitor C17. One end of capacitor C17 is grounded, and the other end is connected to resistor R6 and the source electrode of MOS transistor Q5. The other end of resistor R6 is connected to the gate electrode of MOS transistor Q5 and resistor R8. The drain electrode of MOS transistor Q5 is connected to the parallel combination of capacitor C18 and resistor R7. After capacitor C18 and resistor R7 are connected in parallel, they are grounded. Resistor R8 is connected to the collector electrode of triode Q7. The emitter electrode of triode Q7 is grounded. The base electrode of triode Q7 is connected to resistor R12, and resistor R12 is connected to the voltage multiplier PWM drive circuit for receiving the PWM_O square wave signal. The PWM_O square wave signal comes from the voltage multiplier PWM drive circuit. The drain electrode of MOS transistor Q5 outputs N_VCC to the negative voltage multiplier output circuit.

[0049] The negative voltage multiplier switch drive circuit is used to output voltage multiplier power supply according to the PWM duty cycle.

[0050] Figure 7 It is a positive voltage multiplier output circuit. Figure 8 It is a negative voltage multiplier output circuit, which uses a half-bridge drive transformer to output positive high voltage and negative high voltage, and then connects to the electrode needle after passing through two impedance resistors. Input 10 - 15V_1A PWM drive voltage, the positive output is 9KV, and the negative output is 8KV. After passing through the high-voltage resistor, positive 4.5KV high voltage and negative 4KV high voltage are output to connect to the discharge needle.

[0051] Figure 9 It is an LED indication circuit, including connector J1. Pin 1 of connector J1 is connected to resistor R14, pin 3 is connected to resistor R17. Resistors R14 and R17 are connected to VCC. Pin 2 is connected to P_EN, and P_EN comes from the voltage multiplier abnormal detection drive circuit. Pin 4 is grounded. The power supply green light is on, and the abnormal red light is on.

[0052] Figure 10 It is a voltage multiplier abnormal detection drive circuit, which is connected to the feedback ends of the positive voltage multiplier and the negative voltage multiplier, and realizes an alarm signal according to the voltage change logic at the feedback ends. It includes diode D5, resistor R15, capacitor C21, diode D4, capacitor C22, resistor R13, resistor R16, and triode Q8. Diode D5, resistor R15, capacitor C21, capacitor C22, and resistor R16 are connected in parallel, and one end of the parallel combination is grounded, and the other end is connected to the base electrode of triode Q8. The positive electrode of diode D4 is connected to the positive electrode of resistor R15, and the negative electrode of diode D4 is connected to the positive electrode of capacitor C22. One end of resistor R13 is connected to the positive electrode of capacitor C22 and the other end is connected to the base electrode of triode Q8. The emitter electrode of triode Q8 is grounded, and the collector electrode of triode Q8 is connected to P_EN.

[0053] This utility model uses a 24V DC power supply voltage, which is stepped down to 15.8V by DCDC to supply power to the PWM drive chip NE555 for voltage doubling. When the NE555 chip is powered on, the oscillator starts to oscillate. When it is just powered on, since the voltage on C15 cannot change suddenly, the initial potential is at a low level, causing the chip to be set and the output to be at a high level. C15 is charged through R3 and D9. When the voltage is charged to two-thirds of the threshold level VCC, the chip is reset and the output is at a low level. At this time, C15 discharges through the internal discharge tube of the chip to generate a PWM output. The PWM output controls the two-way voltage doubling power supply switch circuit. The half-bridge drive transformer works and outputs positive and negative high voltages through the voltage doubling circuit. After passing through two impedance resistors, it is connected to the electrode needles. The electrode needles generate corona discharge, generating a large number of positive and negative air ions, and through the high voltage, it is transported to the surface of the static electricity-carrying object without the cooperation of air power, neutralizing the positive and negative static charges, so as to achieve the purpose of eliminating the static electricity on the object surface.

[0054] Among them, the duty cycle of the negative high voltage of the voltage doubling PWM drive circuit = R3 / (R3 + R4) = 22.6 / 52.6 = 43%, the duty cycle of the positive high voltage = 100% - 43% = 57%, and the frequency = 1.43 / 52.6 * 1 = 0.027KHZ = 27HZ.

[0055] This utility model is a short-distance 30mm - 50mm small static eliminator, which uses alloy tungsten needle electrodes. By alternately applying positive and negative DC high voltages to the coupled electrode needles, the DC high voltage source uses an AC implementation method to act on the electrode needles through a coupling device to generate corona discharge, generating a large number of positive and negative air ions, and through the high voltage, it is transported to the surface of the static electricity-carrying object without the cooperation of air power, neutralizing the positive and negative static charges, so as to achieve the purpose of eliminating the static electricity on the object surface.

[0056] The above description is only a preferred embodiment of the present utility model, and does not impose any form of limitation on the present utility model. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model all fall within the scope of the technical solution of the present utility model.

Claims

1. A driving circuit for a micro PWM DC pulse static eliminator bar, characterized in that: It includes a voltage multiplier PWM drive circuit, a positive voltage multiplier circuit, and a negative voltage multiplier circuit. The output end of the voltage multiplier PWM drive circuit is connected to the input end of the positive voltage multiplier circuit and the input end of the negative voltage multiplier circuit. The output ends of the positive voltage multiplier circuit and the negative voltage multiplier circuit are used to connect to the electrode needles. The voltage multiplier PWM drive circuit includes a chip U1. The pin 1 of the chip U1 is grounded. The second path of the pin 2 is connected to the capacitor C15, and the capacitor C15 is grounded. The second path of the pin 2 is connected to the pin 6. The third path of the pin 2 is connected to the negative electrode of the diode D9. The fourth path of the pin 2 is connected to the resistor R4, and the other end of the resistor R4 is connected to the positive electrode of the diode D9. The positive electrode of the diode D9 is connected to the pin 7 and the resistor R3, and the resistor R3 and the pin 8 are connected to H_VCC. The pin 3 is connected to the resistor R5. The resistor R5 outputs the PWM_O square wave signal to the input end of the positive voltage multiplier circuit and the input end of the negative voltage multiplier circuit. The resistor R5 is connected to the resistor R9, and the resistor R9 is grounded. The pin 4 is connected to H_VCC. The pin 5 is connected to the capacitor C16, and the capacitor C16 is grounded.

2. The driving circuit of a micro PWM DC pulse static eliminator bar according to claim 1, characterized in that: The positive voltage multiplier circuit includes a positive voltage multiplier switch drive circuit. The positive voltage multiplier switch drive circuit includes a capacitor C19. One end of the capacitor C19 is grounded, and the other end is connected to the resistor R10 and the source electrode of the MOS transistor Q6. The other end of the resistor R10 is connected to the gate electrode of the MOS transistor Q6 and the positive electrode of the diode D3. The drain electrode of the MOS transistor Q6 is connected to the parallel-connected capacitor C20 and resistor R11. After the capacitor C20 and the resistor R11 are connected in parallel, they are grounded. The negative electrode of the diode D3 is connected to the voltage multiplier PWM drive circuit to receive the PWM_O square wave signal.

3. A driving circuit for a micro PWM DC pulse static eliminator bar according to claim 1, characterized in that: The negative voltage multiplier circuit includes a negative voltage multiplier switch drive circuit. The negative voltage multiplier switch drive circuit includes a capacitor C17. One end of the capacitor C17 is grounded, and the other end is connected to the resistor R6 and the source electrode of the MOS transistor Q5. The other end of the resistor R6 is connected to the gate electrode of the MOS transistor Q5 and the resistor R8. The drain electrode of the MOS transistor Q5 is connected to the parallel-connected capacitor C18 and resistor R7. After the capacitor C18 and the resistor R7 are connected in parallel, they are grounded. The resistor R8 is connected to the collector electrode of the triode Q7. The emitter electrode of the triode Q7 is grounded. The base electrode of the triode Q7 is connected to the resistor R12, and the resistor R12 is connected to the voltage multiplier PWM drive circuit to receive the PWM_O square wave signal.

4. A driving circuit for a miniature PWM DC pulse static eliminator bar according to claim 1, characterized in that: It also includes a wide voltage input circuit, which includes a capacitor C28, a capacitor C29, a diode D6, and a diode D7. The positive electrodes of the capacitor C28, the capacitor C29, and the diode D6 are connected to VIN_24V. The capacitor C28, the capacitor C29, and the diode D7 are connected in parallel. The negative electrode of the diode D6 is connected to the negative electrode of the diode D7 and outputs VCC. The other end of the capacitor C28, the other end of the capacitor C29, and the positive electrode of the diode D7 are grounded.

5. A driving circuit for a miniature PWM DC pulse static eliminator bar according to claim 4, characterized in that: It also includes a DC / DC voltage multiplier drive voltage circuit, which includes chip U2. The 5th pin of U2 is connected to VCC, capacitor C25, capacitor C23, and resistor R19. Capacitor C25 and capacitor C23 are connected in parallel and then grounded. Resistor R19 is connected to the 4th pin and EN. The 1st pin is connected to capacitor C24. Capacitor C24 and the 6th pin are connected to inductor L3. The other end of inductor L3 outputs H_VCC. The 3rd pin is connected to resistor R18. Resistor R18 is connected to H_VCC. The 2nd pin is grounded on one path, connected to resistor R20 on another path, and connected to capacitor C26 on another path. Resistor R20 is connected to the 3rd pin. Capacitor C26 is connected to H_VCC.

6. The driving circuit of a micro PWM DC pulse static eliminator bar according to claim 5, characterized in that: It also includes an LED indication circuit, which includes connector J1. The 1st pin of connector J1 is connected to resistor R14. The 3rd pin is connected to resistor R17. Resistors R14 and R17 are connected to VCC. The 2nd pin is connected to P_EN. The 4th pin is grounded.

7. A driving circuit for a miniature PWM DC pulse static eliminator bar according to claim 6, characterized in that: It also includes a voltage multiplier anomaly detection drive circuit, which includes diode D5, resistor R15, capacitor C21, diode D4, capacitor C22, resistor R13, resistor R16, and triode Q8. Diode D5, resistor R15, capacitor C21, capacitor C22, and resistor R16 are connected in parallel, and one end of the parallel connection is grounded, and the other end is connected to the base of triode Q8. The positive electrode of diode D4 is connected to the positive electrode of resistor R15. The negative electrode of diode D4 is connected to the positive electrode of capacitor C22. One end of resistor R13 is connected to the positive electrode of capacitor C22, and the other end is connected to the base of triode Q8. The emitter of triode Q8 is grounded. The collector of triode Q8 is connected to P_EN.

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