CN108551253A - A kind of switch tube driving circuit of electrostatic precipitator system - Google Patents
A kind of switch tube driving circuit of electrostatic precipitator system Download PDFInfo
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- CN108551253A CN108551253A CN201810615218.6A CN201810615218A CN108551253A CN 108551253 A CN108551253 A CN 108551253A CN 201810615218 A CN201810615218 A CN 201810615218A CN 108551253 A CN108551253 A CN 108551253A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1213—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for DC-DC converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of switch tube driving circuits of electrostatic precipitator system, including isolating transformer T1, diode D3~D8, triode Q1~Q4, metal-oxide-semiconductor Q5~Q6, resistance R13~R17, capacitance C11.The present invention improves the driving capability of PWM wave in power control circuit using isolating transformer, and the PWM waveform that power control circuit SG3525 is generated is allow to directly control the working condition of switching tube.
Description
Technical field
The invention belongs to power technique fields, a kind of particularly switch tube driving circuit of electrostatic precipitator system.
Background technology
High voltage power supply is part most crucial in entire electric dust removal system, due to the feelings of electric precipitator work high voltage again
Under condition, disruptive discharge that gas or liquid medium occur along insulating surface.It is best in order to make electrostatic precipitator be operated in
Operating mode makes efficiency of dust collection maintain optimum value, is necessarily required to that spark flashover is detected and is controlled.Switching tube drives
Circuit is the important component of high voltage power supply, and the pwm control signal for exporting power control circuit enhances to drive
Dynamic circuit for power conversion, therefore, how to design the switch tube driving circuit being simple and efficient becomes the important of influence power supply cost performance
One of factor.
Therefore, for drawbacks described above present in currently available technology, it is really necessary to be studied, to provide a kind of side
Case solves defect existing in the prior art.
Invention content
The present invention provides a kind of switch tube driving circuit of electrostatic precipitator system in view of the deficiencies in the prior art, uses
Preferably to control the output operating mode of electric precipitator.
To achieve the above object, technical scheme is as follows：
A kind of switch tube driving circuit of electrostatic precipitator system, including isolating transformer T1, diode D3~D8, three poles
Pipe Q1~Q4, metal-oxide-semiconductor Q5~Q6, resistance R13~R17, capacitance C11；The base stage of first triode Q1 is with the second triode Q2's
The other end of one end connection of base stage, eleventh resistor R11, eleventh resistor R11 is connect with 11 pins of control chip U1, the
The collector of one triode Q1 is connect with ground terminal, and the collector of the second triode Q2 is connect with 15V voltages, the first triode Q1's
Emitter is connect with the 1st pin of the emitter of the second triode Q2, one end of thirteenth resistor R13, isolating transformer T1, the
The other end of 13 resistance R13 is connect with one end of the 11st capacitance C11, the base stage of third transistor Q3 and the 4th triode Q4
Base stage, twelfth resistor R12 one end connection, the other end of twelfth resistor R12 connect with 12 pins for controlling chip U1,
The collector of 4th triode Q4 is connect with ground terminal, and the collector of third transistor Q3 is connect with 15V voltages, third transistor Q3
Emitter connect with the emitter of the 4th triode Q4, one end of the 11st capacitance C11, the 3rd pin of isolating transformer T1,
The 2nd pin of isolating transformer T1 is connect with one end of the cathode of third diode D3, the 14th resistance R14, isolating transformer
The 5th pin of T1 and anode, one end of the 16th resistance R16, the source electrode of the first metal-oxide-semiconductor Q5, the 2nd MOS of the 6th diode D6
The drain electrode of pipe Q6 connects, one end of the 6th pin of isolating transformer T1 and the cathode of the 4th diode D4, the 15th resistance R15
Connection, the 4th pin of isolating transformer T1 and anode, one end of the 17th resistance R17, the second metal-oxide-semiconductor of the 8th diode D8
The source electrode connection of Q5 and ground terminal, the anode of third diode D3 and the other end of the 14th resistance R14, the 5th diode D5
The grid connection of anode, the other end of the 16th resistance R16, the first metal-oxide-semiconductor Q5, the cathode of the 5th diode D5 and the six or two pole
The cathode of pipe D6 connects, the anode of the 4th diode D4 and the other end of the 15th resistance R15, the 7th diode D7 anode,
The grid connection of the other end of 17th resistance R17, the second metal-oxide-semiconductor Q6, the cathode and the 8th diode D8 of the 7th diode D7
Cathode connection, the 310V busbar voltages of the drain electrode of the first metal-oxide-semiconductor Q5 and current rectifying and wave filtering circuit connect；The isolating transformer T1
Using EE22 magnetic cores, armature winding and two secondary windings are respectively around 30 circles, no-load voltage ratio 1：1：1, triode Q1, Q3 are NPN type three
Pole pipe, triode Q2, Q4 are PNP type triode, and diode D3, D4 model RS1M, diode D5~D8 are that voltage stabilizing is organ,
Metal-oxide-semiconductor Q5, Q6 model IRFP460.
The device have the advantages that：
The switch tube driving circuit of the present invention drives metal-oxide-semiconductor IRFP460 using transformer, to improve power supply control electricity
The driving capability of PWM wave in road, reduces the loss of power supply, improves the power conversion efficiency of power supply entirety.
Description of the drawings
Fig. 1 is the system block diagram of the high-pressure dust-cleaning power supply of electric dust removal system in the present invention；
Fig. 2 is the circuit diagram of the power control circuit of electric dust removal system in the present invention；
Fig. 3 is the circuit diagram of electric dust removal system switch tube driving circuit in the present invention；
Fig. 4 is the circuit diagram of spark flashover detection circuit in the present invention.
Following specific embodiment will be further illustrated the present invention in conjunction with above-mentioned attached drawing.
Specific implementation mode
Technical solution provided by the invention is described further below with reference to attached drawing.
Referring to Fig. 1, it show the system block diagram of the high-pressure dust-cleaning power supply of electric dust removal system of the present invention, including rectifying and wave-filtering
Circuit, circuit for power conversion, power control circuit, switch tube driving circuit, auxiliary power circuit and spark flashover detection circuit,
Wherein, the current rectifying and wave filtering circuit is connected with input is exchanged, for being filtered to exchange input progress rectification and EMI；It is described auxiliary
It helps power circuit to be connected with current rectifying and wave filtering circuit, is that the power control circuit and switching tube drive for exporting DC voltage
Circuit provides power supply；The power conversion circuit is connected with current rectifying and wave filtering circuit, for exporting high drive electrostatic precipitator；
The spark flashover detection circuit is connected with High voltage output, and spark flashover is existing when for capturing high-pressure dust-cleaning electric power outputting current
As and send spark flashover signal to the power control circuit；The power control circuit is connect with switch tube driving circuit,
For exporting control signal according to spark flashover signal to adjust the drive signal of the switch tube driving circuit output；It is described to open
It closes tube drive circuit with circuit for power conversion to be connected, for output drive signal to adjust the circuit for power conversion output
High pressure.
Wherein, current rectifying and wave filtering circuit uses prior art universal circuit.Circuit for power conversion is common using the prior art
Complex resonance code converter, to achieve the purpose that the high voltage output of rear class.
Auxiliary power circuit is mainly that power control circuit, switch tube driving circuit and its relevant control chip provide surely
Fixed supply voltage, it is in a preferred embodiment, real using the common accessory power supply of the prior art in current rectifying and wave filtering circuit
Existing mode designs an isolated form DC-DC power source, since flyback switching topology is suitable for the operating mode and work of small-power output
Make that efficient, circuit structure is relatively simple, is suitable as the main circuit of accessory power supply.The accessory power supply of entire high-pressure dust-cleaning power supply
Power supply is divided into two-way output：Major loop output voltage is 12V, output power 9W, is carried for power control circuit and drive module
For DC voltage；Subloop output voltage is 5V, output power 3W, and control chip provides voltage.
Such as Fig. 2, it show the circuit diagram of the power control circuit of electric dust removal system of the present invention, including control chip
U1, diode D2, capacitance C6~C10, resistance R4~R10；Control the 1st pin of chip U1 and one end of the 8th capacitance C8, the
One end of six resistance R6 connects, and the 2nd pin is connect with one end of one end of the 5th resistance R5, the 9th resistance R9, and the 3rd pin is outstanding
Sky, the 4th pin is hanging, and the 5th pin is connect with one end of one end of the 6th capacitance C6, the 4th resistance R4, the 6th pin and the tenth electricity
One end connection of R10 is hindered, the 7th pin is connect with the other end of the 4th resistance R4, and the anode of the 8th pin and the 7th capacitance C7 are even
It connects, one end of the 9th pin and the tenth capacitance C11, one end connection of the other end, the 9th capacitance C9 of the 8th capacitance C8, the 10th draws
Foot is connect with one end of the cathode of the second diode D2, the 9th resistance R9, and the 11st pin is connect with power source internal drive module, the
It after 12 pins are connect with the other end of the 9th resistance R9 and is grounded, the 13rd pin is connect with one end of the 8th resistance R8, and the 14th draws
The drive module of foot and power source internal connects, and the 15th pin is connect with the other end of the 8th resistance R8 is followed by power supply VCC, and the 16th draws
Foot is connect with the other end of the 7th resistance R7；The other end of 5th resistance R5 is grounded, the other end of the 6th capacitance C6 and the tenth electricity
The resistance other end of R10, the cathode of the 7th capacitance C7, the other end of the tenth capacitance C10, the other end of the 9th resistance R9 are connected and are connect
The other end on ground, the 6th resistance R6 is connect with the other end of the 9th capacitance C9, and the other end of the tenth capacitance C10 connects power supply VCC,
The anode of second diode D2 is connected as the receiving terminal Fire_flag of detection signal with spark flashover detection circuit；Described
Diode D2 is Schottky diode, and the 7th capacitance C7 is electrolytic capacitor, and the tenth resistance R10 is to adjust swept resistance, controls core
The model SG3525 of piece U1.
In above-mentioned technical proposal, the present invention, as control chip, control waveform is provided for drive module using SG3525.
SG3525 is more suitable for applying in IGBT as in the full-bridge inverting topology of power switch tube, and performance is stablized, and peripheral circuit device needs
It asks less and power consumption is smaller, more meet the design objective of this paper.
SG3525 chips belong to monolithic type high integrated circuit, are mainly used in high frequency switch power, high-voltage inverter, big
The fields such as power charger.All required impulse regulators of power switch tube control circuit of built-in chip type.Monoblock chip
Inside contains reference voltage, error amplifier, pulse width regulator, oscillator with, soft starting circuit and output driving
The modules such as circuit.
The work characteristics of SG3525 is：
(1) possess the internal reference voltage of 5V ± 1%；
(2) possess very wide working frequency concussion range, working frequency can be selected in 100Hz~400kHz；
(3) inside, which possesses oscillation module, has the function of external sync；
(4) internal to contain soft starting circuit, possess the response time of 2S；
(5) output waveform possesses fixed dead time, and dead zone modulation is realized by pin；
(6) under-voltage protecting circuit in chip, as power voltage insufficient 8V, chip will be stopped, into locking
State；
(7) possess overvoltage, overcurrent and overheating protection module；
The great advantage of SG3525 is that inside possesses complete error amplification module and comparator, and error amplifying circuit is logical
A two-stage differential amplifier composition is crossed, 80dB open loop gain amplifiers, the voltage collected by divider resistance are held up to
Signal accesses the inverting input (1 foot) of SG3525, and the positive terminal (2 foot) of error amplifier is connected with reference power supply.Pass through
The error enlarging function of two-stage differential amplifier, completes the closed loop feedback of circuit system.Table 1 lists each pins of SG3525
Function.
Table 1 controls chip SG3525 Pin descriptions
The SPWM signals of control chip output two-way complementation are sent to drive module, so that upper and lower bridge power is opened using drive module
The output for closing pipe is isolated, and the same switching tube of high and low side all the way on main circuit will not be in conducting state simultaneously, make high and low side
Switching tube to complete driving complementary.Control chip power supply voltage is 12V, while having overcurrent, overvoltage and short-circuit protection.
SG3525 exports two-way drive waveforms by 11 feet (OUTA) and 14 feet (OUTB), passes through the cunning on 6 feet (R10)
The working frequency of dynamic rheostat R10 control output waveforms.10 foot of chip (SD) is overcurrent protection pin, passes through reversed two pole
Pipe is connected with overcurrent acquisition signal.
According to system pulses frequency modulation(PFM) design needs, by 3 foot of useless pin (Sync) of SG3525,4 feet (OSC) with
The direct short circuit of ground terminal.8 feet (Soft-StaR10) connect the capacitance of 4.7 μ F and are connected with ground wire, and 50 μ A are provided to soft start pin
Electric current makes chip operation in soft-start mode.15 feet (VCC) and the 12V of 13 feet (VC) access accessory power supply power.9 feet
(Comp) feedback network is accessed between 1 foot (VIO+), for ensureing the stabilization of feedback control loop.The present invention compensates net using II type
Network forms a compensator by R6, C8, C9 in figure.
Circuit controls working frequency size using C6, R10 and R4.The 5 foot other ends of C6 connection chips are grounded, and are cores
The concussion capacitance of piece.It is required that its capacitance range generates chip between 0.001uF~0.1uF, by its charge and discharge
Sawtooth wave.R10 is to shake capacitance connection to 6 feet, its value determines the charging time of oscillating capacitance C6, and the resistance value the big, fills
The electric time is longer.Whole system realizes that output is adjustable by the control of R10, therefore its value is related to the model of output voltage
It encloses, is under normal circumstances 2k~150K Ω.R4 is that the dead zone resistance of chip is connected to 7 feet, its resistance value determines concussion capacitance
Discharge time.System determines the size of dead time by setting the value of R4, avoids bridge arm direct pass phenomenon, resistance value model
It is trapped among in 0~500 Ω.In a preferred embodiment, the value that C6, R4 has been determined by calculation is respectively 2.7nF, 100
Ω。
Such as Fig. 3, show the circuit diagram of switch tube driving circuit, including isolating transformer T1, diode D3~D8,
Triode Q1~Q4, metal-oxide-semiconductor Q5~Q6, resistance R13~R17, capacitance C11；The base stage of first triode Q1 and the second triode
The base stage of Q2, one end connection of eleventh resistor R11,11 pins of the other end and control chip U1 of eleventh resistor R11 connect
It connects, the collector of the first triode Q1 is connect with ground terminal, and the collector of the second triode Q2 is connect with 15V voltages, the one or three pole
The emitter of the emitter of pipe Q1 and the second triode Q2, one end of thirteenth resistor R13, isolating transformer T1 the 1st pin
Connection, the other end of thirteenth resistor R13 are connect with one end of the 11st capacitance C11, the base stage of third transistor Q3 and the 4th
The base stage of triode Q4, one end connection of twelfth resistor R12, the other end of twelfth resistor R12 and the 12 of control chip U1
Pin connects, and the collector of the 4th triode Q4 is connect with ground terminal, and the collector of third transistor Q3 is connect with 15V voltages, the
The emitter of the emitter of three triode Q3 and the 4th triode Q4, one end of the 11st capacitance C11, isolating transformer T1
3 pins connect, and the 2nd pin of isolating transformer T1 is connect with one end of the cathode of third diode D3, the 14th resistance R14,
The 5th pin and the anode of the 6th diode D6 of isolating transformer T1, one end of the 16th resistance R16, the first metal-oxide-semiconductor Q5 source
The drain electrode connection of pole, the second metal-oxide-semiconductor Q6, the 6th pin of isolating transformer T1 and cathode, the 15th resistance of the 4th diode D4
One end of R15 connects, the 4th pin of isolating transformer T1 and the anode of the 8th diode D8, the 17th resistance R17 one end,
The source electrode of second metal-oxide-semiconductor Q5 connects and ground terminal, the anode of third diode D3 and the other end of the 14th resistance R14, the 5th
The grid connection of the anode of diode D5, the other end of the 16th resistance R16, the first metal-oxide-semiconductor Q5, the cathode of the 5th diode D5
It is connect with the cathode of the 6th diode D6, the anode of the 4th diode D4 and the other end, the 7th diode of the 15th resistance R15
The grid connection of the anode of D7, the other end of the 17th resistance R17, the second metal-oxide-semiconductor Q6, the cathode and the 8th of the 7th diode D7
The cathode of diode D8 connects, and the drain electrode of the first metal-oxide-semiconductor Q5 and the 310V busbar voltages of current rectifying and wave filtering circuit connect；The isolation
Transformer T1 uses EE22 magnetic cores, and armature winding and two secondary windings are respectively around 30 circles, no-load voltage ratio 1：1：1, triode Q1, Q3 are
NPN type triode, triode Q2, Q4 are PNP type triode, and diode D3, D4 model RS1M, diode D5~D8 are voltage stabilizing
For organ, metal-oxide-semiconductor Q5, Q6 model IRFP460.
The present invention drives metal-oxide-semiconductor IRFP460 using transformer, to improve the driving of PWM wave in power control circuit
Ability.
Such as Fig. 4, it show the circuit diagram of spark flashover detection circuit of the present invention, including logic chip U2, diode
D9~D12, resistance R18~R23, capacitance C11~C12, NPN type triode Q7~Q8, spark inductive sensor L2；Logic chip U2
The 1st pin connect with one end of the 2nd pin, one end of the 21st resistance R21, the 12nd capacitance C12, the 3rd pin and the 4th
Pin connects, and the 5th pin is connect with the 1st pin, the other end of the 6th pin and the 9th pin, the 10th pin, the 12nd capacitance C12
The base stage of connection, the 7th pin ground connection, the 8th pin and NPN diodes Q8 are connected to the output end Fire_flag of detection circuit,
The other end connection of 10th pin, the 12nd capacitance C12, the 12nd pin and the 13rd pin, one section of the second inductance L2, the 18th
One section of resistance R18, the anode of the 9th diode D9, the both ends of the 11st capacitance C11, the both ends of the 20th resistance R20, the tenth
The both ends of one diode D11, the emitter of NPN type triode Q7 are connected and are grounded, and the 14th pin connects 5V power supplys；Second inductance L2
The other end connect with one end of the other end of the 18th resistance R18, the 19th resistance R19, the other end of the 19th resistance R19
It is connect with the cathode of the 9th diode D9, the anode of the tenth diode D10, the base stage of NPN triode Q7, the tenth diode D10
Cathode connect and connect 5V power supplys with the collector of NPN triode Q7, the other end ground connection of the 21st resistance R21, tri- poles NPN
The collector of pipe Q8 is connect with the anode of one end of the 23rd resistance R23, the 12nd diode D12, the hair of NPN triode Q8
Emitter-base bandgap grading connect and is grounded with the cathode of the 12nd diode D12, and the other end of the 23rd resistance R23 is connect with 5V power supplys；Institute
Logic chip U2 the models SN74HC00, the 12nd diode D12 stated is LED diodes, and the second inductance is Spark plug optical fiber sensor electricity
Sense；The 5V power supplys are provided by the accessory power supply of high voltage power supply.
Spark flashover refers under action of high voltage, the destructiveness that gas or liquid medium occur along insulating surface
Electric discharge, this is also often happened on electric precipitator.Spark flashover can be such that the electric current of load end increases rapidly and sparking occurs,
The efficiency of dust collection of deduster also can significantly decline.In order to make electrostatic precipitator be operated in best operating mode, make efficiency of dust collection
Optimum value is maintained, is necessarily required to that spark flashover is detected and is controlled.
When electrostatic precipitator flashing flashover, the electric current in output loading can increase rapidly, and voltage
Horse back is reduced.Flashover detection circuit of the present invention is exactly to be captured to spark flashover according to this characteristic.
Circuit incudes the output of transformer by inductive sensor L2, and transformer output line is worn from inductance circle center
It crosses.Since the curent change of electromagnetic induction phenomenon output end produces induced current on induction coil, to make system acquisition
To flashover signal, induced current becomes the voltage signal of induction, two poles in circuit by the partial pressure amplification of resistance R18 and R19
Pipe D9, D10 play clamped protective effect.The RC differential circuits of R21 and C12 compositions utilize the charge and discharge of capacitance, can be by rectangle
Wave becomes impulse wave, therefore only acquires when signal mutates suddenly and just have output, keeps the feedback of detecting system more steady
It is fixed.U2 is that four tunnels 2 input positive NAND gate, including four independent 2 input nand gates, it can be with logical functionOrWhen detecting flashover, U2 can export high level and feed back on the indicator light of circuit, indicator light
Start to dodge contracting, and when flashover disappears, U2 can then export low level, system worked well.This circuit utilizes RC circuits
The logic behaviour of derivative characteristic and NAND gate makes the spark flashover Detection accuracy of system greatly improve, reduce missing inspection with
And the phenomenon that false retrieval, to improve safety and the controllability of deduster.
The course of work：
Line voltage is converted to the 310V voltages of busbar by current rectifying and wave filtering circuit by power supply, and power control circuit uses
SG3525 generates the SPWM signals of 30kHz or so, is driven by switch tube driving circuit switch tube, is dodged in conjunction with spark
Network signal detection carries out feedback control to system.
Spark flashover detection circuit monitors the output operating mode of high voltage power supply in real time by inductive sensor L2, transformer
Output line is passed through from inductance circle center.Since the curent change of electromagnetic induction phenomenon output end produces induction on induction coil
Electric current, to make system acquisition to flashover signal, induced current is by the partial pressure amplification of resistance as the voltage signal of induction, electricity
Diode D9, D10 in road play clamped protective effect.The RC differential circuits of R21 and C12 compositions utilize the charge and discharge of capacitance,
Rectangular wave can be become to impulse wave, therefore only acquire when signal mutates suddenly and just have output, make detecting system
Feedback is more stablized.Logic chip is that four tunnels 2 input positive NAND gate, including four independent 2 input nand gates, can hold
Row logical functionOrWhen detecting flashover, U2 can export high level, and Fire_flag believes at this time
Number be high level, feed back on the indicator light of circuit, indicator light start dodge contracting, the 10th pin of power supply control chip U1 connects at this time
By high level, chip U1 starts to reduce working frequency control output voltage decline, and when flashover disappears, U2 then can be defeated
Go out low level, indicator light is without prompt, power control circuit normal work.
The explanation of above example is only intended to facilitate the understanding of the method and its core concept of the invention.It should be pointed out that pair
For those skilled in the art, without departing from the principle of the present invention, the present invention can also be carried out
Some improvements and modifications, these improvement and modification are also fallen within the protection scope of the claims of the present invention.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (1)
1. a kind of switch tube driving circuit of electrostatic precipitator system, which is characterized in that including isolating transformer T1, diode D3
~D8, triode Q1~Q4, metal-oxide-semiconductor Q5~Q6, resistance R13~R17, capacitance C11；The base stage and the two or three of first triode Q1
The base stage of pole pipe Q2, one end connection of eleventh resistor R11, the other end of eleventh resistor R11 draw with the 11 of control chip U1
Foot connects, and the collector of the first triode Q1 is connect with ground terminal, and the collector of the second triode Q2 is connect with 15V voltages, and first
The emitter of the emitter of triode Q1 and the second triode Q2, one end of thirteenth resistor R13, isolating transformer T1 the 1st
Pin connects, and the other end of thirteenth resistor R13 connect with one end of the 11st capacitance C11, the base stage of third transistor Q3 and
The base stage of 4th triode Q4, one end connection of twelfth resistor R12, the other end and the control chip U1 of twelfth resistor R12
The connection of 12 pins, the collector of the 4th triode Q4 connect with ground terminal, collector and 15V the voltages company of third transistor Q3
It connects, emitter, one end of the 11st capacitance C11, the isolating transformer of the emitter of third transistor Q3 and the 4th triode Q4
The 3rd pin of T1 connects, one end of the 2nd pin of isolating transformer T1 and the cathode of third diode D3, the 14th resistance R14
Connection, the 5th pin of isolating transformer T1 and anode, one end of the 16th resistance R16, the first metal-oxide-semiconductor of the 6th diode D6
The drain electrode connection of the source electrode of Q5, the second metal-oxide-semiconductor Q6, the 6th pin of isolating transformer T1 and the cathode of the 4th diode D4, the tenth
One end of five resistance R15 connects, the 4th pin of isolating transformer T1 and the anode of the 8th diode D8, the 17th resistance R17
One end, the source electrode connection of the second metal-oxide-semiconductor Q5 and ground terminal, the anode of third diode D3 and the other end of the 14th resistance R14,
The grid connection of the anode of 5th diode D5, the other end of the 16th resistance R16, the first metal-oxide-semiconductor Q5, the 5th diode D5's
Cathode is connect with the cathode of the 6th diode D6, the anode of the 4th diode D4 and the other end of the 15th resistance R15, the seven or two
The anode of pole pipe D7, the other end of the 17th resistance R17, the second metal-oxide-semiconductor Q6 grid connection, the cathode of the 7th diode D7 with
The cathode of 8th diode D8 connects, and the drain electrode of the first metal-oxide-semiconductor Q5 and the 310V busbar voltages of current rectifying and wave filtering circuit connect；It is described
Isolating transformer T1 uses EE22 magnetic cores, and armature winding and two secondary windings are respectively around 30 circles, no-load voltage ratio 1：1：1, triode Q1,
Q3 is NPN type triode, and triode Q2, Q4 are PNP type triode, and diode D3, D4 model RS1M, diode D5~D8 are
Voltage stabilizing is organ, metal-oxide-semiconductor Q5, Q6 model IRFP460.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810615218.6A CN108551253A (en) | 2018-06-14 | 2018-06-14 | A kind of switch tube driving circuit of electrostatic precipitator system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810615218.6A CN108551253A (en) | 2018-06-14 | 2018-06-14 | A kind of switch tube driving circuit of electrostatic precipitator system |
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| CN108551253A true CN108551253A (en) | 2018-09-18 |
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| CN201810615218.6A Withdrawn CN108551253A (en) | 2018-06-14 | 2018-06-14 | A kind of switch tube driving circuit of electrostatic precipitator system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110739859A (en) * | 2019-11-28 | 2020-01-31 | 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) | symmetrical half-bridge resonant open-loop DC proportional converter |
| CN110868078A (en) * | 2019-11-28 | 2020-03-06 | 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) | LCT integrated magnetic element of sine power converter |
-
2018
- 2018-06-14 CN CN201810615218.6A patent/CN108551253A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110739859A (en) * | 2019-11-28 | 2020-01-31 | 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) | symmetrical half-bridge resonant open-loop DC proportional converter |
| CN110868078A (en) * | 2019-11-28 | 2020-03-06 | 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) | LCT integrated magnetic element of sine power converter |
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