CN109450422A - A kind of driving circuit of self-pulsing type series connection photo thyristor - Google Patents
A kind of driving circuit of self-pulsing type series connection photo thyristor Download PDFInfo
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- CN109450422A CN109450422A CN201811467892.0A CN201811467892A CN109450422A CN 109450422 A CN109450422 A CN 109450422A CN 201811467892 A CN201811467892 A CN 201811467892A CN 109450422 A CN109450422 A CN 109450422A
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 28
- 238000012545 processing Methods 0.000 claims abstract description 21
- 239000003990 capacitor Substances 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 claims description 5
- 239000000872 buffer Substances 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 210000001367 artery Anatomy 0.000 claims description 2
- 210000003462 vein Anatomy 0.000 claims description 2
- 208000033748 Device issues Diseases 0.000 claims 1
- 230000005611 electricity Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000013307 optical fiber Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
- H03K17/79—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar semiconductor switches with more than two PN-junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/0081—Power supply means, e.g. to the switch driver
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention discloses a kind of driving circuits of self-pulsing type series connection photo thyristor, are mainly made of power supply processing circuit, pulse generation circuit, synchronous circuit, logical circuit and light pulse emission circuit；Pulse generation circuit, synchronous circuit, logical circuit and the light pulse emission circuit is sequentially connected and connects；The power supply processing circuit is pulse generation circuit, synchronous circuit, logical circuit and light pulse emission loop power supply；The pulse generation circuit receives the enable signal that the next machine controller issues, generate single driving electric pulse of certain duty ratio, the processing of synchronized circuit and logical circuit is generated the conducting with the light pulse triggering driving photo thyristor of high consistency by light pulse emission circuit.The present invention realizes that simply few using component, stability is good, and anti-electromagnetic interference capability is strong, high reliablity, and service time is inconsistent caused by efficiently solving the problems, such as because of device parameters difference.
Description
Technical field
The invention belongs to field of power electronics, are related to self-pulsing type driving circuit, which partly leads for connecting
The triggering and conducting of body device photo thyristor.
Background technique
Traditional automatically controlled thyristor ETT(Electronic Triggered Thyristor) it controls it using electric pulse and leads
Logical, driving pulse realizes the electrical isolation of high-low pressure by isolating transformer.Photo thyristor LTT(Light Triggered
Thyristor) it is to solve the problems, such as that automatically controlled thyristor exists to be developed before more than 20 years, utilizes the light of certain wavelength
According to signal triggering and conducting thyristor, high-power light-operated trigger signal then passes through the semiconductor laser on the included optical cable of thyristor itself
Device realizes triggering and conducting, can be well isolated from high-pressure side to the electromagnetic interference of low-pressure side.Two class thyristors are chiefly used in high straightening
It flows in transmission system and flexible AC transmitting system, but the voltage of single thyristor is lower, needs to connect and realizes the application of high pressure.
Since the on state resistance of thyristor is milliohm rank, off-state resistance is megaohm rank, and the two differs very big, the thyristor of conducting
The voltage at both ends falls to its on-state voltage drop, so that the thyristor be connected afterwards can bear higher overvoltage.Therefore brilliant lock of connecting
The driving circuit of pipe must keep the consistency of trigger pulse.
Chinese patent application CN102820874A discloses a kind of trigger circuit for photo thyristor, using programmable
Logical device, laser tube string and optical receiver complete the generation of trigger pulse, and trigger pulse is issued to light by logical process
Transmitter is supplied to photo thyristor.Mostly photoelectric conversion link among the circuit, realizes more complicated, reduces efficiency, and
The circuit does not specify trigger pulse consistency problem.For concatenated thyristor, if to issue the time inconsistent for pulse, will generate
The phenomenon that dynamic unbalanced-voltage-division weighs.
Chinese patent application CN101764410A discloses a kind of photo thyristor valve group trigger circuit, passes through Phototube Coupling
Circuit converts optical signals to electric signal and amplifies by isolation, while passing through impulse circuit 1 and impulse circuit 2, output Shaping
After be sent into combiner circuit, become a strong trigger signal, photo thyristor triggered by optical fiber.The circuit only individually elaborates arteries and veins
Treatment process is rushed, trigger pulse consistency problem is not specified.
Summary of the invention
It is an object of the invention to be directed to the deficiencies in the prior art, it is light-operated to provide a kind of self-pulsing type series connection
The driving circuit of thyristor.Driving circuit of the invention receives the thyristor status signal of photo thyristor state-detection plate detection
The enable signal issued with the next machine controller returns triggering state feedback letter to slave computer while generating triggering light
Breath.
In order to achieve the above objectives, The technical solution adopted by the invention is as follows:
The driving circuit of a kind of self-pulsing type series connection photo thyristor, mainly by power supply processing circuit, pulse generation circuit, same
Step circuit, logical circuit and light pulse emission circuit composition；Pulse generation circuit, synchronous circuit, logical circuit and the light
Impulse ejection circuit, which is sequentially connected, to be connect；The power supply processing circuit is pulse generation circuit, synchronous circuit, logical circuit and light
Impulse ejection loop power supply；The external the next machine controller in the pulse generation circuit and photo thyristor state-detection plate；Institute
The external photo thyristor in light pulse emission circuit stated；The next machine controller of pulse generation circuit reception issues enabled
Signal generates single driving electric pulse of certain duty ratio, the processing of synchronized circuit and logical circuit, by light pulse emission circuit
Generate the conducting with the light pulse triggering driving photo thyristor of high consistency.
As the further explanation of specific technical solution of the present invention, the power supply processing circuit is 4.5~60V of input
DC voltage, export the positive voltage of 5V, electric current up to 2A power supply processing circuit.The power supply processing circuit in the present invention
The preferential power supply chip LMZ36002RVQT for selecting 24V voltage input, 5V output；The chip has wide input range, output electricity
Stream reaches 2A, is the power supply chip of high power small package, but needs to pay attention to radiating treatment, usually with the mode of via hole heating pad
To realize.
As the further explanation of specific technical solution of the present invention, the pulse generation circuit is equipped with 555 timers electricity
Road.Physical circuit design is preferred are as follows: mainly by a NPN type triode, a NE555 timer, two diodes, several
Resistance, capacitance connection are into the pulse generation circuit mainly by a NPN type triode, a NE555 timer, two
Diode, several resistance, capacitance connection form；Specifically: it is outer after one resistance of base series of the NPN type triode
Connect the next machine controller, the collector of NPN type triode another resistance of connecting is followed by+5V supply voltage, NPN type triode
Emitter ground connection；The pin 1 of NE555 timer is grounded, and pin 4 connects the collector of NPN type triode, and pin 3 connects synchronous circuit,
Pin 8 connects+5V supply voltage, and pin 7 connects the input terminal of one of diode, and pin 6 and pin 2 connect one of them two pole
The output end of pipe, pin 5 connect a capacitor after be grounded；Output end one electrolytic capacitor of series connection of one of diode is followed by
Ground, the input of another diode terminate the output end of one of diode, and the output end series connection of another diode is another
A resistance is followed by one end of swept resistance, and the other end of swept resistance another resistance of connecting is followed by+5V supply voltage, sliding electricity
The pin 7 of the sliding termination NE555 timer of resistance.The pulse generation circuit receives the enabled letter that the next machine controller issues
Number, and under the action of enable signal, NE555 timer circuit exports impulse wave, and output pulse high level is 200ms, week
Phase 1s.
As specific technical solution of the present invention further explanation and preferably, the synchronous circuit is by single pulse signal
It is changed into the circuit of multipulse signal.Synchronous circuit first with same input, divides column output circuit, carries out cascaded triggering control.At this
In invention, synchronous circuit using the phase inverter chip CD4049UB for having 16 system buffers, CMOS level can preferably be turned
It is changed to Transistor-Transistor Logic level, which allows input high level to be more than supply voltage, and enhances driving current.The different outputs with input,
The time difference in each channel is up to the sum of delay-time difference and conversion time difference, is 140ns.
As specific technical solution of the present invention further explanation and preferably, the logical circuit is mainly by one 42
NAND gate chip, a NPN type triode, several resistance, capacitor composition；The 42 NAND gate chips are used to have and be applied
The 2 input nand gate chip MC14093B of four-way of close spy's Trigger Function.Logical circuit will drive original pulse to drive by level-one
With device status information phase and and reversely after dynamic amplification.Logical circuit issues under the premise of detecting that device status information is good
Synchronous driving pulse is input to rear class, guarantees that the reliability of circuit work, i.e., the state that logical circuit transmits master control determine letter
Number with trigger pulse collective effect determine light pulse generation, when in good condition and pulse issues, logical circuit output electricity
Driving pulse.
As specific technical solution of the present invention further explanation and preferably, the light pulse emission circuit is mainly by one
A fiber optic emitter, a NPN type triode, a PNP type triode and several resistance, capacitor composition.The optical fiber
Transmitter uses the fiber optic emitter of model HFBR-1414Z, and the light pulse optical power of generation is not less than 10mW, and wavelength is
800nm~1000nm.In light pulse emission circuit, push-pull output stage enhancing is made of NPN type triode and PNP type triode
The driving capability of driving pulse, driving fiber optic emitter HFBR-1414Z generate light pulse, and light pulse is issued to light-operated through optical fiber
The gate pole of thyristor completes the reliable triggering of photo thyristor.
Compared with prior art, the present invention have the utility model has the advantages that
1. service time is inconsistent caused by solving the problems, such as because of device parameters difference.
2. direct current triggers enable signal, electromagnetic interference of the high-pressure side to low-pressure side, high reliablity is isolated.
3. realizing simple, cost performance height few using component, stability is good.
Detailed description of the invention
Fig. 1 is the connection principle block diagram of one embodiment of the invention and the next machine controller, photo thyristor string；
Fig. 2 is the structural block diagram of one embodiment of the invention；
Fig. 3 is the circuit diagram in power supply processing circuit in one embodiment of the invention；
Fig. 4 is the circuit diagram of pulse generating loop in one embodiment of the invention；
Fig. 5 is the circuit diagram of synchronous circuit in one embodiment of the invention；
Fig. 6 is the circuit diagram of logical circuit in one embodiment of the invention；
Fig. 7 is the circuit diagram in light pulse emission circuit in one embodiment of the invention.
Specific embodiment
The following further describes the present invention with reference to the drawings.
Embodiment:
As shown in Figure 1, the driving circuit of the present embodiment receives the thyristor status signal of photo thyristor state-detection plate detection
The enable signal issued with the next machine controller returns triggering state feedback letter to slave computer while generating triggering light
Breath.
Specific circuit structure as shown in Fig. 2, a kind of self-pulsing type series connection photo thyristor driving circuit, mainly by
Power supply processing circuit, pulse generation circuit, synchronous circuit, logical circuit and light pulse emission circuit composition；The pulse hair
Raw circuit, synchronous circuit, logical circuit and light pulse emission circuit are sequentially connected and connect；The power supply processing circuit is pulse hair
Raw circuit, synchronous circuit, logical circuit and light pulse emission loop power supply；The external slave computer control in the pulse generation circuit
Device and photo thyristor state-detection plate；The external photo thyristor in light pulse emission circuit；The pulse generation is returned
Road receives the enable signal that the next machine controller issues, and generates single driving electric pulse of certain duty ratio, synchronized circuit and patrols
The processing for collecting circuit is generated leading for the light pulse triggering driving photo thyristor with high consistency by light pulse emission circuit
It is logical.
In the present embodiment, the DC voltage of power supply processing circuit input 24V, the positive voltage for exporting 5V are provided to each circuit
Power supply；Pulse generation circuit exports oscillating impulse after receiving the enable signal that the next machine controller issues.Oscillating circuit uses
NE555 timer chip circuit passes through setting charging resistor and discharge resistance value, the adjustable impulse wave of output duty cycle.Control
Driving capability of the enable signal through transistor amplifier enhancing signal.Synchronous circuit divides column output circuit first with same input, into
The control of row cascaded triggering.Single driving signal carries out level translation through NOT gate chip, and enhances the driving capability of signal.Light pulse hair
It is emitted back towards routing fiber optic emitter to generate, the gate pole of photo thyristor is issued to through optical fiber.Prime is to constitute with logic gates
Driving circuit completes the reliable triggering of light pulse.
In order to which the technical solution of the present embodiment is more clearly understood, the present embodiment is made into one below in conjunction with attached drawing 3-7
Step explanation:
The power supply chip LMZ36002RVQT of 24V voltage input, 5V output is selected in the power supply processing circuit of the present embodiment.Such as Fig. 3
Shown, VBAT is 24V DC voltage, and quoted from external switch power supply, 24V power supply enters power supply chip through protective tube
LMZ36002RVQT, when output voltage is greater than 4.5V, the external resistance R1 of chip pin 7 terminates output voltage；When output electricity
When pressure is less than 4.5V, the end R1 ground connection.If output voltage is 5V, resistance R5 value 5.11K Ω.
The pulse generation circuit of the embodiment of the present invention is mainly by a NPN type triode, NE555 timer, two
A diode, several resistance, capacitance connection form.As shown in figure 4, after the base series resistor R57 of NPN type triode V14
External bottom machine controller, the collector series resistance R49 of NPN type triode V14 are followed by+5V supply voltage, NPN type triode
The emitter of V14 is grounded；The pin 1 of NE555 timer U15 is grounded, and pin 4 connects the collector of NPN type triode V14, pin 3
Synchronous circuit is connect, pin 8 connects+5V supply voltage, and pin 7 connects the input terminal of diode D4, and pin 6 and pin 2 connect diode
The output end of D4 is grounded after 5 series capacitance C36 of pin；It is grounded after the output end series connection electrolysis capacitor EC3 of diode D4, two poles
The output end of the input terminating diode D4 of pipe D5, the output end series resistance R56 of diode D5 are followed by the one of swept resistance R52
End, the other end series resistance R46 of swept resistance R52 are followed by+5V supply voltage, and the sliding termination NE555 of swept resistance R52 is fixed
When device U15 pin 7；Capacitor C29, C30 latter end ground connection in parallel, another termination+5V supply voltage.
The synchronous circuit of the present embodiment is the circuit that single pulse signal is changed into multipulse signal.As shown in figure 5, synchronous
Circuit uses the phase inverter chip CD4049UB with 16 system buffers, and each pin connection relationship is as shown in the figure.
The chip U13 that the logical circuit of the present embodiment uses for schmidt trigger function four-way 2 input with it is non-
Door chip MC14093B.Its partial circuit is as shown in fig. 6, mainly by chip U13, NPN type triode V13, several resistance, electricity
Hold composition.
The circuit structure in the light pulse emission circuit of the present embodiment is as shown in fig. 7, mainly by a fiber optic emitter, one
NPN type triode, a PNP type triode and several resistance, capacitor composition.Specifically: fiber optic emitter U16 selects model
For HFBR-1414Z.The pin 1,4,5,8,3 of fiber optic emitter U16 is grounded, one end of the equal connecting resistance R50 of pin 2,6,7；Electricity
The emitter of another termination NPN type triode V11 of R50 is hindered, the collector of NPN type triode V11 meets+5V supply voltage, NPN
Connect after the base series resistor R51 of type triode V11 with the output of prime NAND gate；The base stage of PNP type triode V12 connects
The base stage of NPN type triode V11, the emitter of PNP type triode V12 connect the emitter of NPN type triode V11, three pole of positive-negative-positive
The grounded collector of pipe V12.That is NPN type triode V11(PBSS4140T) and PNP type triode V12(PBSS5140T) constitute
Push-pull output stage, when driving pulse is high level, upper tube conducting；When driving pulse is low level, down tube conducting, driving electricity
Stream is up to 1A.
Above example is merely illustrative of the technical solution of the present invention rather than its limitations, although referring to examples detailed above to this hair
It is bright to be described in detail, it should be understood by those ordinary skilled in the art that: still can be to specific embodiment party of the invention
Formula modify perhaps replace on an equal basis and without departing from any modification of spirit and scope of the invention or equivalent replacement, should all
It is included within the scope of the claims of the present invention.
Claims (10)
1. a kind of driving circuit of self-pulsing type series connection photo thyristor, it is characterised in that: mainly by power supply processing circuit, arteries and veins
Rush generating loop, synchronous circuit, logical circuit and light pulse emission circuit composition；The pulse generation circuit, synchronous circuit,
Logical circuit and light pulse emission circuit are sequentially connected and connect；The power supply processing circuit be pulse generation circuit, synchronous circuit,
Logical circuit and light pulse emission loop power supply；The external the next machine controller in the pulse generation circuit and photo thyristor shape
State detection plate；The external photo thyristor in light pulse emission circuit；The pulse generation circuit receives slave computer control
The enable signal that device issues generates single driving electric pulse of certain duty ratio, the processing of synchronized circuit and logical circuit, by light
Impulse ejection circuit generates the conducting with the light pulse triggering driving photo thyristor of high consistency.
2. the driving circuit of self-pulsing type series connection photo thyristor according to claim 1, it is characterised in that: described
Power supply processing circuit be the DC voltage for inputting 4.5~60V, export the positive voltage of 5V, electric current up to 2A power supply processing circuit.
3. the driving circuit of self-pulsing type series connection photo thyristor according to claim 2, it is characterised in that: described
The power supply chip LMZ36002RVQT that power supply processing circuit is exported using 24V voltage input, 5V.
4. the driving circuit of self-pulsing type series connection photo thyristor according to claim 1, it is characterised in that: described
Pulse generation circuit is equipped with NE555 timer circuit, and under the action of enable signal, NE555 timer circuit exports impulse wave,
It is 200ms, period 1s that it, which exports pulse high level,.
5. the driving circuit of self-pulsing type series connection photo thyristor according to claim 4, it is characterised in that: described
Pulse generation circuit is mainly by a NPN type triode, a NE555 timer, two diodes, several resistance, capacitor
It is formed by connecting；Specifically: external bottom machine controller, NPN type three after one resistance of base series of the NPN type triode
The collector of pole pipe another resistance of connecting is followed by+5V supply voltage, the emitter ground connection of NPN type triode；NE555 timer
Pin 1 be grounded, pin 4 connects the collector of NPN type triode, and pin 3 connects synchronous circuit, and pin 8 connects+5V supply voltage, draws
Foot 7 connects the input terminal of one of diode, and pin 6 and pin 2 connect the output end of one of diode, and pin 5 is connected
It is grounded after one capacitor；The output end of one of diode is connected and is grounded after an electrolytic capacitor, another diode it is defeated
Enter the output end for terminating one of diode, the output end of another diode another resistance of connecting is followed by swept resistance
One end, the other end of swept resistance another resistance of connecting are followed by+5V supply voltage, and the sliding termination NE555 of swept resistance is fixed
When device pin 7.
6. the driving circuit of self-pulsing type series connection photo thyristor according to claim 1, it is characterised in that: described
Synchronous circuit is the circuit that single pulse signal is changed into multipulse signal.
7. the driving circuit of self-pulsing type series connection photo thyristor according to claim 6, it is characterised in that: described
Synchronous circuit uses the phase inverter chip CD4049UB with 16 system buffers.
8. the driving circuit of self-pulsing type series connection photo thyristor according to claim 1, it is characterised in that: described
Logical circuit is mainly made of a 42 NAND gate chips, a NPN type triode, several resistance, capacitor；Described 42
NAND gate chip uses the 2 input nand gate chip MC14093B of four-way with schmidt trigger function.
9. the driving circuit of self-pulsing type series connection photo thyristor according to claim 1, it is characterised in that: described
Light pulse emission circuit mainly by a fiber optic emitter U16, a NPN type triode V11, a PNP type triode V12 and
Several resistance, capacitor composition, specifically: the pin 1,4,5,8,3 of the fiber optic emitter U16 is grounded, pin 2,6,7
A resistance of connecting after connecting is followed by the emitter of NPN type triode V11, and the collector of NPN type triode V11 connects+5V power supply
Voltage；The base stage of PNP type triode V12 connects the base stage of NPN type triode V11, and the emitter of PNP type triode V12 connects NPN type
The emitter of triode V11, the grounded collector of PNP type triode V12.
10. the driving circuit of self-pulsing type series connection photo thyristor according to claim 9, it is characterised in that: described
Fiber optic emitter use the fiber optic emitter of model HFBR-1414Z, the light pulse optical power of generation is not less than 10mW, wave
A length of 800nm~1000nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811467892.0A CN109450422B (en) | 2018-12-03 | 2018-12-03 | Drive circuit of self-generated pulse type series light-operated thyristor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811467892.0A CN109450422B (en) | 2018-12-03 | 2018-12-03 | Drive circuit of self-generated pulse type series light-operated thyristor |
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| Publication Number | Publication Date |
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| CN109450422A true CN109450422A (en) | 2019-03-08 |
| CN109450422B CN109450422B (en) | 2024-09-06 |
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| CN201811467892.0A Active CN109450422B (en) | 2018-12-03 | 2018-12-03 | Drive circuit of self-generated pulse type series light-operated thyristor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861588A (en) * | 2019-04-04 | 2019-06-07 | 浙江正泰电器股份有限公司 | Soft activator trigger circuit |
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| CN109861588B (en) * | 2019-04-04 | 2024-05-14 | 浙江正泰电器股份有限公司 | Soft starter trigger circuit |
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