CN205269917U - High frequency high voltage power supply with breaking of contact is closed fast to spark -over - Google Patents
High frequency high voltage power supply with breaking of contact is closed fast to spark -over Download PDFInfo
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- CN205269917U CN205269917U CN201521079600.8U CN201521079600U CN205269917U CN 205269917 U CN205269917 U CN 205269917U CN 201521079600 U CN201521079600 U CN 201521079600U CN 205269917 U CN205269917 U CN 205269917U
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Abstract
The utility model discloses a high frequency high voltage power supply with breaking of contact is closed fast to spark -over has CPU, and CPU control triggers drive unit drive high frequency inverter unit, and high frequency inverter unit's output and high frequency step up the unit and meet, its characterized in that: be equipped with with the high frequency sampling circuit that unit output current meets that steps up, sampling circuit's output loop through primary voltage follower circuit, for the first time the high -speed buffer circuit of signal, secondary voltage follower circuit, high -speed voltage comparison circuit, for the second time the high -speed buffer circuit of signal latch with the spark signal and the treatment circuit meets, the spark signal latchs and the output of treatment circuit is met with CPU all the way, another way and trigger sampling circuit 0 and meet, CPU latchs and handles circuit control and triggers drive unit through the spark signal.
Description
Technical field
This utility model relates to a kind of high-voltage electrostatic dust separator high-frequency and high-voltage power supply, especially one can timely and reliably detect spark-over and rapidly switch off IGBT, and can by spark-over occur transient signals carry out latch carry out spark interrupt subsequent treatment, avoid arcing, shorten the time again rising to maximum from spark-over to voltage, system stability and efficiency of dust collection can be improved, it is to avoid the spark-over that has of waste of energy rapidly switches off the high-frequency and high-voltage power supply of circuit.
Background technology
High-voltage electrostatic dust separator is under the effect of high-tension electricity field force, charged grit is made to be deposited on electrode, thus the dust arrester separated from dusty gas by grit, it is widely used to the industries such as electric power, metallurgy, building materials, chemical industry, oil, weaving, boiler, iron and steel. The special high-power high-frequency high-voltage power supply of existing high-voltage electrostatic dust separator is equipped with the high-frequency inversion unit connected with three-phase electricity, the output of high-frequency inversion unit connects with high frequency boosting unit, it is additionally provided with the output current detection circuit connected with CPU simultaneously, CPU controls trigger drive unit according to the output electric current detected and drive the IGBT in high-frequency inversion unit. Because there is the problems such as air-flow instability and the linear change of plate electrode inside cleaner unit, substantially can puncture with the frequency accidental generation high tension spark of about 60 beats/min. Output current wave when apparatus of load is normal is as shown in Figure 1; The output current wave of spark-over generation moment is as shown in Figure 2; If output current wave when there is phenomenon of arc discharge is as shown in Figure 3. Due to when outfan spark-over, output electric current only exists of short duration increase phenomenon, therefore existing high-frequency and high-voltage power supply all cannot ensure in time and capture spark-over signal in the moment of high frequency electric source spark-over exactly, the long arcing characteristic occurred inside cleaner unit can only be leaned on to occur to detect spark-over, then just carried out the spark interrupt processing of software by CPU. The long-time arcing of equipment, not only reduces efficiency of dust collection, causes waste of energy, but also there is the risk of device damage.
Summary of the invention
This utility model is to solve the above-mentioned technical problem existing for prior art, one is provided spark-over can timely and reliably to be detected and rapidly switch off IGBT, and can by spark-over occur transient signals carry out latch carry out spark interrupt subsequent treatment, avoid arcing, shorten the time again rising to maximum from spark-over to voltage, system stability and efficiency of dust collection can be improved, it is to avoid the spark-over that has of waste of energy rapidly switches off the high-frequency and high-voltage power supply of circuit.
Technical solution of the present utility model is: a kind of have spark-over and rapidly switch off the high-frequency and high-voltage power supply of circuit, there is CPU, CPU controls trigger drive unit and drives high-frequency inversion unit, the output of high-frequency inversion unit connects with high frequency boosting unit, it is characterized in that: be provided with and the sample circuit of high frequency boosting unit output electrical currency, the output of sample circuit passes sequentially through first time voltage follower circuit, first time signal high-speed isolated circuit, second time voltage follower circuit, high speed voltage comparator circuit, second time signal high-speed isolated circuit latches with spark signal and processes circuit and connects, spark signal latches and processes output one tunnel of circuit and connects with CPU, another road connects with trigger drive unit, described CPU is latched by spark signal and processing circuit controls trigger drive unit.
Described spark signal latches and processes the output of U7-10 foot and second time signal high-speed isolated circuit that circuit is provided with rest-set flip-flop U7, rest-set flip-flop U7 and connects, the U7-9 output point two-way of rest-set flip-flop: diode D2 of leading up to is connected to CPU; Another road connect respectively or door U8D U8D-12 foot and or the U8A-1 foot of door U8A; Or the U8D-13 foot of door U8 connects the PFM-BC foot of CPU, or the U8A-2 foot of door U8A connects the PFM-AD foot of CPU; Or the U8D-11 of door U8D is output as triggering signal OUT-BC, or the U8A-3 foot of door U8A is output as triggering signal OUT-AD; The U7-8 foot of rest-set flip-flop U7 connects with the negative electrode of light emitting diode D1, and the anode of light emitting diode D1 is connected to the U7-11 foot of CPU, rest-set flip-flop U7 by the resistance R11 U7-13 foot meeting operating supply voltage Ucc2, rest-set flip-flop U7, U7-12 foot connects power supply ground.
Described sample circuit is provided with resistance R1, R2 of being in series, and resistance R2 one end connects with filter capacitor C1, another termination power ground.
Described first time voltage follower circuit is provided with the U1-3 foot of high speed amplifier U1, high speed amplifier U1 and connects with filter capacitor C1, and U1-2 foot connects with resistance R3 after connecting with U1-6 foot; U1-7 foot and U1-4 connect with running voltage+Ucc1 ,-Ucc1 respectively.
Described first time signal high-speed isolated circuit is provided with high speed amplifier U2, the U2-3 foot of high speed amplifier U2 connects with the resistance R3 other end, the U2-6 foot of high speed amplifier U2 is connected by the U3-1 foot of resistance R4 with high-speed linear optocoupler U3, the U2-2 foot of high speed amplifier U2 connects with the U3-3 foot of high-speed linear optocoupler U3, U2-6 foot and the U2-2 foot of electric capacity C2 and high speed amplifier U2 connect, the U3-4 foot of high-speed linear optocoupler U3 connects power supply ground, the U3-6 foot of high-speed linear optocoupler U3 meets running voltage+Ucc1, and the U3-5 foot of high-speed linear optocoupler U3 is outfan.
Described second time voltage follower circuit is provided with the U4-3 foot of high speed amplifier U4, high speed amplifier U4 and connects power supply ground by resistance R5, and U4-2 foot connects with resistance R6 after connecting with U4-6 foot; U4-7 foot and U4-4 connect with running voltage+Ucc1 ,-Ucc1 respectively.
Described high speed voltage comparator circuit is provided with high speed voltage comparator U5, the U5-4 foot of high speed voltage comparator U5 connects with the other end of resistance R6, the U5-5 foot of high speed voltage comparator U5 connects with resistance R7, R8 of being in series, the other end of resistance R7 connects with running voltage+Ucc1, another termination power ground of resistance R8, resistance R8 two ends are in parallel with filter capacitor C3, and the U5-2 foot of high speed voltage comparator U5 is outfan.
Described second time signal high-speed isolated circuit is provided with high speed photo coupling U6, the U6-3 foot of high speed photo coupling U6 connects with the U5-2 foot of high speed voltage comparator U5, the U6-4 foot of high speed photo coupling U6 connects power supply ground, the U6-6 foot of high speed photo coupling U6 connects with resistance R9 and resistance R10, the other end of resistance R9 connects with running voltage Ucc2, and the other end of resistance R10 connects with electric capacity C4 and is followed by power supply ground.
This utility model timely and reliably detects spark-over in the moment that spark-over occurs and rapidly switches off IGBT, it is to avoid phenomenon of arc discharge occurs; The transient signals that spark-over occurs can be carried out latch and carry out spark interruption subsequent treatment, shorten the time again rising to maximum from spark-over to voltage, improve system stability, it is to avoid waste of energy, improve efficiency of dust collection. This utility model also have simultaneously circuit simple, without advantages such as manual debugging and capacity of resisting disturbance are strong.
Accompanying drawing explanation
Fig. 1 be cleaner load normal time output current wave Fig. 1.
Fig. 2 is the output current wave figure that moment occurs spark-over.
Output current wave figure when Fig. 3 is phenomenon of arc discharge occur.
Fig. 4 is the schematic block circuit diagram of this utility model embodiment.
Fig. 5 is the concrete layout of this utility model embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described. as shown in Figure 1: a kind of have spark-over and rapidly switch off the high-frequency and high-voltage power supply of circuit, such as prior art, there is CPU, CPU controls trigger drive unit and drives high-frequency inversion unit, the output of high-frequency inversion unit connects with high frequency boosting unit, with prior art the difference is that be provided with and high frequency boosting unit output electrical currency sample circuit, the output of sample circuit passes sequentially through first time voltage follower circuit, first time signal high-speed isolated circuit, second time voltage follower circuit, high speed voltage comparator circuit, second time signal high-speed isolated circuit latches with spark signal and processes circuit and connects, spark signal latches and processes output one tunnel of circuit and connects with CPU, another road connects with trigger drive unit, described CPU is latched by spark signal and processing circuit controls trigger drive unit.
Concrete circuit is as shown in Figure 2:
Described sample circuit is provided with resistance R1, R2 of being in series, and resistance R2 one end connects with filter capacitor C1, another termination power ground,
Described first time voltage follower circuit is provided with the U1-3 foot of high speed amplifier U1, high speed amplifier U1 and connects with filter capacitor C1, and U1-2 foot connects with resistance R3 after connecting with U1-6 foot; U1-7 foot and U1-4 respectively with running voltage+Ucc1(+12V) ,-Ucc1(-12V) connect.
Described first time signal high-speed isolated circuit is provided with high speed amplifier U2, the U2-3 foot of high speed amplifier U2 connects with the resistance R3 other end, the U2-6 foot of high speed amplifier U2 is connected by the U3-1 foot of resistance R4 with high-speed linear optocoupler U3, the U2-2 foot of high speed amplifier U2 connects with the U3-3 foot of high-speed linear optocoupler U3, U2-6 foot and the U2-2 foot of electric capacity C2 and high speed amplifier U2 connect, the U3-4 foot of high-speed linear optocoupler U3 connects power supply ground, the U3-6 foot of high-speed linear optocoupler U3 meets running voltage+Ucc1, and the U3-5 foot of high-speed linear optocoupler U3 is outfan.
Described second time voltage follower circuit is provided with the U4-3 foot of high speed amplifier U4, high speed amplifier U4 and connects power supply ground by resistance R5, and U4-2 foot connects with resistance R6 after connecting with U4-6 foot; U4-7 foot and U4-4 connect with running voltage+Ucc1 ,-Ucc1 respectively.
Described high speed voltage comparator circuit is provided with high speed voltage comparator U5, the U5-4 foot of high speed voltage comparator U5 connects with the other end of resistance R6, the U5-5 foot of high speed voltage comparator U5 connects with resistance R7, R8 of being in series, the other end of resistance R7 connects with running voltage+Ucc1, another termination power ground of resistance R8, resistance R8 two ends are in parallel with filter capacitor C3, and the U5-2 foot of high speed voltage comparator U5 is outfan.
Described second time signal high-speed isolated circuit is provided with high speed photo coupling U6, the U6-3 foot of high speed photo coupling U6 connects with the U5-2 foot of high speed voltage comparator U5, the U6-4 foot of high speed photo coupling U6 connects power supply ground, the U6-6 foot of high speed photo coupling U6 connects with resistance R9 and resistance R10, the other end of resistance R9 connects with running voltage Ucc2, and the other end of resistance R10 connects with electric capacity C4 and is followed by power supply ground.
Described spark signal latches and processes the output of U7-10 foot and second time signal high-speed isolated circuit that circuit is provided with rest-set flip-flop U7, rest-set flip-flop U7 and connects, the U7-9 output point two-way of rest-set flip-flop: diode D2 of leading up to is connected to CPU; Another road connect respectively or door U8D U8D-12 foot and or the U8A-1 foot of door U8A; Or the U8D-13 foot of door U8 connects the PFM-BC foot of CPU, or the U8A-2 foot of door U8A connects the PFM-AD foot of CPU; Or the U8D-11 of door U8D is output as triggering signal OUT-BC, or the U8A-1U8A-3 foot of door U8A is output as triggering signal OUT-AD; The U7-8 foot of rest-set flip-flop U7 connects with the negative electrode of light emitting diode D1, the anode of light emitting diode D1 meets operating supply voltage Ucc2(+3.3V by resistance R11), the U7-13 foot of rest-set flip-flop U7 is connected to the U7-11 foot of CPU, rest-set flip-flop U7, U7-12 foot connects power supply ground.
Described components and parts are outsourcing element, and its high speed amplifier U1, U2, U4 all adopt OP27; High-speed linear optocoupler U3 adopts HCNR200; High speed voltage comparator U5 adopts LM339; High speed photo coupling U6 adopts HCPL062N; Rest-set flip-flop U7 adopts 74LVC74.
Operation principle:
High-pressure electrostatic high frequency electric source output electric current sampled signal after over-sampling circuit is I2, I2 is by after resistor divider filter, follow through first time voltage follower circuit, then through entering High-speed Electric pressure comparison circuit after first time signal high-speed isolated circuit, second time voltage follower circuit, the comparison point of high speed voltage comparator circuit is set to 1.3 times of the sampling voltage value that during normal operation, high frequency transformer maximum instantaneous electric current is corresponding. When apparatus of load is normal, output current wave is as it is shown in figure 1, high speed voltage comparator is failure to actuate; Output waveform when the moment that spark occurs is as shown in Figure 2, namely the secondary current of high frequency transformer has the peak value rising of one of short duration (tens of uS), this peak value will result in the action of high speed voltage comparator circuit, the level signal that action produces delivers to S end (high speed voltage comparator U5 action when spark occurs of rest-set flip-flop after second time signal high-speed isolated circuit is isolated, U5-2 foot is output as high level, drive optocoupler U6, U6-6 foot is output as low level, delivers to the S end of rest-set flip-flop after RC filters).
Connect the triggering signal that PFM-AD, PFM-BC signal is IGBT of CPU pin, Low level effective. When SPK-CLOSE-TRIG signal is low, IGBT trigger signal can by or door U8A, U8D export OUT-AD, OUT-BC; When SPK-CLOSE-TRIG is high level, triggering signal output OUT-AD, OUT-BC and be driven high, it is invalid to trigger.
During system electrification, S=1, the SPK-CLR signal of CPU is sent out one, R end and is become the pulse of 1 by rest-set flip-flop by 0=0,=1; And maintain, light emitting diode D1 is not luminous.
If no-spark occurs after high frequency electric source starts, R end is all constant with the level of S end,WithState remain unchanged, the sustainable boosting of high frequency electric source.
When high frequency electric source load flashing punctures, high speed voltage comparator U5 action described above, the low level pulse then producing width 10us delivers to the S end of rest-set flip-flop, and now the state of RS is R=1, S=0, rest-set flip-flop set=1,=0; The peak point current waveform pop-off that spark produces, S end is restored to 1 state. But now status lock has been decided to be stable by rest-set flip-flop=1,=0 state, luminous tube D1 luminous prompting spark occurs, and connectsEnd signal SPK-CLOSE-TRIG by or door U8A, U8D trigger output signal OUT-AD, OUT-BC are become high level, locking IGBT triggers signal; ConnectAnother road signal of end delivers to terminal cpu pin by D2, the generation of spark detected to CPU time enough, and carries out the spark interrupt processing of software. Process terminates rear signal SPK-CLR and sends a low level pulse, and rest-set flip-flop is reset to set=0,The state of=1, IGBT trigger signal further through or door U8A, U8D export OUT-AD, OUT-BC, high frequency electric source continuous voltage rise.
Claims (8)
1. one kind has spark-over and rapidly switches off the high-frequency and high-voltage power supply of circuit, there is CPU, CPU controls trigger drive unit and drives high-frequency inversion unit, the output of high-frequency inversion unit connects with high frequency boosting unit, it is characterized in that: be provided with and the sample circuit of high frequency boosting unit output electrical currency, the output of sample circuit passes sequentially through first time voltage follower circuit, first time signal high-speed isolated circuit, second time voltage follower circuit, high speed voltage comparator circuit, second time signal high-speed isolated circuit latches with spark signal and processes circuit and connects, spark signal latches and processes output one tunnel of circuit and connects with CPU, another road connects with trigger drive unit, described CPU is latched by spark signal and processing circuit controls trigger drive unit.
2. according to claim 1 have spark-over and rapidly switch off the high-frequency and high-voltage power supply of circuit, it is characterized in that: described spark signal latches and processes circuit and is provided with rest-set flip-flop U7, the U7-10 foot of rest-set flip-flop U7 connects with the output of second time signal high-speed isolated circuit, the U7-9 output point two-way of rest-set flip-flop: diode D2 of leading up to is connected to CPU; Another road connect respectively or door U8D U8D-12 foot and or the U8A-1 foot of door U8A; Or the U8D-13 foot of door U8D connects the PFM-BC foot of CPU, or the U8A-2 foot of door U8A connects the PFM-AD foot of CPU; Or the U8D-11 of door U8D is output as triggering signal OUT-BC, or the U8A-3 foot of door U8A is output as triggering signal OUT-AD; The U7-8 foot of rest-set flip-flop U7 connects with the negative electrode of light emitting diode D1, and the anode of light emitting diode D1 is connected to the U7-11 foot of CPU, rest-set flip-flop U7 by the resistance R11 U7-13 foot meeting operating supply voltage Ucc2, rest-set flip-flop U7, U7-12 foot connects power supply ground.
3. according to claim 2 have spark-over and rapidly switch off the high-frequency and high-voltage power supply of circuit, its
It is characterised by: described sample circuit is provided with resistance R1, R2 of being in series, and resistance R2 one end connects with filter capacitor C1, another termination power ground.
4. according to claim 3 have spark-over and rapidly switch off the high-frequency and high-voltage power supply of circuit, it is characterized in that: described first time voltage follower circuit is provided with high speed amplifier U1, the U1-3 foot of high speed amplifier U1 connects with filter capacitor C1, and U1-2 foot connects with resistance R3 after connecting with U1-6 foot; U1-7 foot and U1-4 connect with running voltage+Ucc1 ,-Ucc1 respectively.
5. according to claim 4 have spark-over and rapidly switch off the high-frequency and high-voltage power supply of circuit, it is characterized in that: described first time signal high-speed isolated circuit is provided with high speed amplifier U2, the U2-3 foot of high speed amplifier U2 connects with the resistance R3 other end, the U2-6 foot of high speed amplifier U2 is connected by the U3-1 foot of resistance R4 with high-speed linear optocoupler U3, the U2-2 foot of high speed amplifier U2 connects with the U3-3 foot of high-speed linear optocoupler U3, U2-6 foot and the U2-2 foot of electric capacity C2 and high speed amplifier U2 connect, the U3-4 foot of high-speed linear optocoupler U3 connects power supply ground, the U3-6 foot of high-speed linear optocoupler U3 meets running voltage+Ucc1, the U3-5 foot of high-speed linear optocoupler U3 is outfan.
6. according to claim 5 have spark-over and rapidly switch off the high-frequency and high-voltage power supply of circuit, it is characterized in that: described second time voltage follower circuit is provided with high speed amplifier U4, the U4-3 foot of high speed amplifier U4 connects power supply ground by resistance R5, and U4-2 foot connects with resistance R6 after connecting with U4-6 foot; U4-7 foot and U4-4 connect with running voltage+Ucc1 ,-Ucc1 respectively.
7. according to claim 6 have spark-over and rapidly switch off the high-frequency and high-voltage power supply of circuit, it is characterized in that: described high speed voltage comparator circuit is provided with high speed voltage comparator U5, the U5-4 foot of high speed voltage comparator U5 connects with the other end of resistance R6, the U5-5 foot of high speed voltage comparator U5 connects with resistance R7, R8 of being in series, the other end of resistance R7 connects with running voltage+Ucc1, another termination power ground of resistance R8, resistance R8 two ends are in parallel with filter capacitor C3, and the U5-2 foot of high speed voltage comparator U5 is outfan.
8. according to claim 7 have spark-over and rapidly switch off the high-frequency and high-voltage power supply of circuit, it is characterized in that: described second time signal high-speed isolated circuit is provided with high speed photo coupling U6, the U6-3 foot of high speed photo coupling U6 connects with the U5-2 foot of high speed voltage comparator U5, the U6-4 foot of high speed photo coupling U6 connects power supply ground, the U6-6 foot of high speed photo coupling U6 connects with resistance R9 and resistance R10, the other end of resistance R9 connects with running voltage Ucc2, and the other end of resistance R10 connects with electric capacity C4 and is followed by power supply ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521079600.8U CN205269917U (en) | 2015-12-23 | 2015-12-23 | High frequency high voltage power supply with breaking of contact is closed fast to spark -over |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521079600.8U CN205269917U (en) | 2015-12-23 | 2015-12-23 | High frequency high voltage power supply with breaking of contact is closed fast to spark -over |
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| Publication Number | Publication Date |
|---|---|
| CN205269917U true CN205269917U (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521079600.8U Withdrawn - After Issue CN205269917U (en) | 2015-12-23 | 2015-12-23 | High frequency high voltage power supply with breaking of contact is closed fast to spark -over |
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| Country | Link |
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| CN (1) | CN205269917U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105618269A (en) * | 2015-12-23 | 2016-06-01 | 大连嘉禾工业控制技术股份有限公司 | High-frequency high-voltage power source capable of rapidly switching off circuit when spark breakdown occurs |
-
2015
- 2015-12-23 CN CN201521079600.8U patent/CN205269917U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105618269A (en) * | 2015-12-23 | 2016-06-01 | 大连嘉禾工业控制技术股份有限公司 | High-frequency high-voltage power source capable of rapidly switching off circuit when spark breakdown occurs |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: High-frequency high-voltage power source capable of rapidly switching off circuit when spark breakdown occurs Effective date of registration: 20170817 Granted publication date: 20160601 Pledgee: China Co truction Bank Corp Dalian Luan Jin sub branch Pledgor: DALIAN JIAHE INDUSTRIAL CONTROL TECHNOLOGY CO., LTD. Registration number: 2017210000017 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160601 Effective date of abandoning: 20171103 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20181218 Granted publication date: 20160601 Pledgee: China Co truction Bank Corp Dalian Luan Jin sub branch Pledgor: DALIAN JIAHE INDUSTRIAL CONTROL TECHNOLOGY CO., LTD. Registration number: 2017210000017 |