CN104467381A - Thyristor optical fiber isolation drive circuit of medium-frequency power supply - Google Patents
Thyristor optical fiber isolation drive circuit of medium-frequency power supply Download PDFInfo
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- CN104467381A CN104467381A CN201410787191.0A CN201410787191A CN104467381A CN 104467381 A CN104467381 A CN 104467381A CN 201410787191 A CN201410787191 A CN 201410787191A CN 104467381 A CN104467381 A CN 104467381A
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- frequency power
- power supply
- drive circuit
- resistance
- isolation drive
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- 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
- H02M1/092—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 the control signals being transmitted optically
-
- 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
- H02M1/06—Circuits specially adapted for rendering non-conductive gas discharge tubes or equivalent semiconductor devices, e.g. thyratrons, thyristors
-
- 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
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
Abstract
The invention relates to the technical field of medium-frequency power supplies and aims to provide a thyristor optical fiber isolation drive circuit of a medium-frequency power supply. The thyristor optical fiber isolation drive circuit of the medium-frequency power supply is connected with a pulse signal source and the medium-frequency power supply. The medium-frequency power supply comprises multiple silicon controlled rectifiers, an optical fiber isolation circuit used for transmitting optical pulse signals in a one-way mode, a narrow pulse filter circuit used for actively filtering out pulses generated due to instant interference, a strong trigger circuit used for directly driving the gate poles of thyristors of the silicon controlled rectifiers and a variable-impedance circuit. The optical fiber isolation drive circuit of the medium-frequency power supply can only transmit the optical pulses in a one-way mode, and back-coupling will not be generated. The interference resistance is improved, and the problem that overvoltage is reversely transmitted to a weak current system is avoided. The thyristor optical fiber isolation drive circuit of the medium-frequency power supply can effectively solve the problem of electromagnetic interference and isolate high voltage from low voltage, has the interference resisting function, and has the capacities of impedance change, small power and strong trigger.
Description
Technical field
The present invention relates to intermediate frequency power supply technical field, be specifically related to a kind of intermediate frequency power supply thyristor Fiber isolation drive circuit.
Background technology
Along with intermediate frequency power supply device transform power is increasing, electromagnetic interference is corresponding increase also, also more and more higher to the requirement of withstand voltage of drive circuit.
Traditional pulse transformer isolated drive circuit, in order to ensure the rate of climb of trigger impulse electric current, former secondary coupling can not be too poor, causes isolating power and driving force to become contradiction.Secondly, because transformer has the feature of bidirectional coupled, one is easily pass back in weak electricity system by high-tension side for secondary interference signal; More importantly, in the moment that power device damages, may have high voltage direct and connect the secondary channeling to pulse transformer, cause former limit to produce very high voltage, driving and control system can be badly damaged.Therefore simple pulse transformer isolation drive mode is own through not meeting the demands.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes deficiency of the prior art, provides a kind of intermediate frequency power supply thyristor Fiber isolation drive circuit.
For technical solution problem, solution of the present invention is:
There is provided a kind of intermediate frequency power supply thyristor Fiber isolation drive circuit, connect pulse signal source and intermediate frequency power supply respectively, intermediate frequency power supply comprises several silicon controlled rectifiers; This Fiber isolation drive circuit described comprises: Fiber isolation circuit, for one-way transmission light pulse signal; Burst pulse filter circuit, for the pulse that active filtering instantaneous interference produces; Strong circuits for triggering and impedance circuit, comprise a metal-oxide-semiconductor be connected with intermediate frequency power supply, for the gate pole of the thyristor of Direct driver silicon controlled rectifier;
In described Fiber isolation circuit, connecting a resistance in the former limit of fiber optic transmitter, and forms loop with pulse signal source; The secondary of fiber optic transmitter is connected to the former limit of fiber optic receiver by optical fiber communication line, the secondary of fiber optic receiver is connected to the input of burst pulse filter circuit, the output of burst pulse filter circuit is connected to the metal-oxide-semiconductor in strong circuits for triggering and impedance circuit, and connects the silicon controlled rectifier of intermediate frequency power supply by it.
In the present invention, described fiber optic transmitter comprises a light-emitting diode, and described resistance is connected to the positive pole of light-emitting diode; Described pulse signal source is connected with the negative pole of resistance and light-emitting diode respectively.
In the present invention, described fiber optic receiver comprises a photodiode, an amplifier and a triode; Described photodiode is connected on the input of amplifier, and the output of amplifier is connected with the base stage of triode, and the emitter of triode is connected with the grounding pin of amplifier and ground connection; Given voltage is connected to the energization pins of amplifier, for fiber optic receiver provides working power.
In the present invention, described burst pulse filter circuit comprises 555 integrators, and its input is connected to given voltage by resistance, and input passes through capacity earth; The output of 555 integrators is connected to the grid of described metal-oxide-semiconductor by resistance.
In the present invention, described 555 integrators have 8 leads ends, and its input is that THR end and TRIG hold, and is connected to ground connection after same electric capacity; Given voltage is connected to R end and VCC end, for 555 integrators provide working power; Its output is Q end, is connected to the grid of described metal-oxide-semiconductor by a resistance.
In the present invention, in described strong circuits for triggering and impedance circuit, the source ground of metal-oxide-semiconductor, its output is connected to the negative electrode of the thyristor of silicon controlled rectifier in intermediate frequency power supply.
In the present invention, described strong circuits for triggering and impedance circuit also comprise two resistance of connecting and an electric capacity; Given voltage is connected to the gate leve of the thyristor of silicon controlled rectifier in intermediate frequency power supply successively by two resistance, described Capacitance parallel connection is on first resistance.
The operation principle of Fiber isolation drive circuit:
Pulse signal changes light signal into through fiber optic transmitter and transmits in optical fiber communication line, pulse signal is reduced into again by fiber optic receiver, pulse signal more after filtering circuit carry out time delay filtration, to filter out the disturbing pulse being less than setting width, then be transferred to semiconductor power device by power amplification.
In the present invention, pulse signal is transported to the former limit of fiber optic transmitter by the current distributing that resistance realizes, after above-mentioned current distributing reaches the rated current of fiber optic transmitter, the optical signal transmission that the secondary of fiber optic transmitter is produced by optical fiber communication line is on the former limit of fiber optic receiver; Described light signal is reduced to the signal of telecommunication by fiber optic receiver, and is transported to the input of burst pulse filter circuit.
The operation principle of burst pulse filter circuit and strong circuits for triggering and impedance circuit:
Burst pulse filter circuit filtering pulse duration can be less than the disturbing pulse setting width, gives strong circuits for triggering by suitable pulse.Strong circuits for triggering and impedance circuit are by the pulse received, and the pulse driving generation one to trigger by force by gate pole impedance, strong trigger impulse gives the semiconductor power electronic device of intermediate frequency power supply.
Compared with prior art, the invention has the beneficial effects as follows:
Intermediate frequency power supply Fiber isolation drive circuit of the present invention, can only one-way transmission light pulse, can not produce reverse coupled.Improve antijamming capability, the problem of overvoltage reverse transfer to weak electricity system also can not occur.
Wherein, burst pulse filter circuit can the initiatively burst pulse that produces of filtering instantaneous interference, and false triggering phenomenon can not occur.Strong circuits for triggering Direct driver gate circuit transistor gate, does not have the leakage inductance of pulse transformer to affect; Trigger impulse forward position intensity is high, is conducive to the open-minded fast of thyristor.Impedance circuit can guarantee the intensity in pulse early stage, and the steady-state current in Limited Pulses later stage, reduces average driving power, is conducive to the miniaturization of drive circuit and improves integrated level.
The present invention effectively can solve electromagnetic interference, and high-low voltage is isolated, and has anti-interference function, the strong burst capability of impedance small-power simultaneously.
Accompanying drawing explanation
Fig. 1 is functional-block diagram of the present invention;
Fig. 2 is the concrete implementing circuit figure of one of the present invention.
Embodiment
Following embodiment can make the technical staff of this professional skill field more fully understand the present invention, but does not limit the present invention in any way.
The present embodiment provides a kind of intermediate frequency power supply thyristor Fiber isolation drive circuit and intermediate frequency power supply, pulse signal, as shown in Figure 1, described intermediate frequency power supply thyristor Fiber isolation drive circuit comprises Fiber isolation circuit, burst pulse filter circuit and strong circuits for triggering and impedance circuit;
As shown in Figure 2, described intermediate frequency power supply comprises 48 silicon controlled rectifier SCR, because structure is identical, only draws the Fiber isolation drive circuit of a silicon controlled rectifier SCR.
Described Fiber isolation circuit comprises resistance R1, fiber optic transmitter TP1, optical fiber communication line, fiber optic receiver TP2; The former limit of fiber optic transmitter TP1 comprises a light-emitting diode, and described resistance R1 is connected to the positive pole of this light-emitting diode; Fiber optic receiver TP2 comprises a photodiode, an amplifier and a triode, described photodiode is connected on the positive and negative input of amplifier, the output of amplifier is connected with the base stage of triode, the emitter of triode is connected with the grounding pin of amplifier and ground connection, the emitter of described triode is connected to the resistance R2 of the input of burst pulse filter circuit and the mid point of resistance R3, the signal of telecommunication is sent to burst pulse filter circuit; The feeder ear of amplifier is connected to given voltage VCC, for fiber optic receiver TP2 work provides power supply.
The input of described Fiber isolation circuit is connected to pulse signal; Described pulse signal is transported to the former limit of fiber optic transmitter TP1 by the current distributing that resistance R1 realizes, after above-mentioned current distributing reaches the rated current of fiber optic transmitter TP1, the optical signal transmission that the secondary of fiber optic transmitter TP1 is produced by optical fiber communication line is on the former limit of fiber optic receiver TP2; Described light signal is reduced to the signal of telecommunication by fiber optic receiver TP2, and is transported to the input of burst pulse filter circuit; This mode solves high-low pressure isolating problem, and simultaneously because pulse signal adopts Optical Fiber Transmission, light is not in the transmission by electromagnetic interference, and pole significantly decreases pulse signal and is subject to electromagnetic interference.
Described burst pulse filter circuit comprises resistance R2, resistance R3, resistance R4, given voltage VCC, 555 integrators and electric capacity C1; Described 555 integrators are provided with 8 pins: 1 pin is earth terminal, and 2 pin are TRIG end, and 3 pin are Q end, and 4 pin are R end, and 5 pin are CV end, and 6 pin are THR end, and 7 pin are DIS end, and 8 pin are feeder ear; Given voltage VCC is connected to the input (i.e. TRIG end and THR end) of 555 integrators by resistance R2 and resistance R3; And the THR of 555 integrators holds and TRIG holds by an electric capacity C1 ground connection; The output (i.e. Q end) of 555 integrators is connected to the grid of metal-oxide-semiconductor in strong circuits for triggering by a resistance R4; The pulse signal received due to fiber optic receiver TP2 is rp pulse, by 555 integrator composition pulse generators pulse signals revivification positive pulse, when the THR end of 555 integrated circuits is high level trigger end, high level is 2/3VCC, if VCC=12V, high level is 8V.Therefore, when THR terminal voltage rises to more than 8V, namely the output of 555 integrated circuits become " 0 ".When TRIG end is low level trigger end, and low level is 1/3VCC, if during VCC=12V, low level is 4V.When TRIG holds level lower than 4V, namely 555 outputs become " 1 ".Resistance R2 is pull-up resistor.Resistance R3, electric capacity C1 form RC circuit, and because electric capacity C1 pulse signals has the charging interval, pulse signal will postpone tens microseconds by electric capacity C1, and carry out filtering by this circuit paired pulses, filtering is less than the burst pulse of time of delay, thus overcomes false triggering problem.
Described strong triggering and impedance circuit comprise metal-oxide-semiconductor, resistance R5, resistance R6 and electric capacity C2; Wherein the drain electrode of metal-oxide-semiconductor is connected with the negative electrode of the thyristor of silicon controlled rectifier SCR, the source ground of metal-oxide-semiconductor; Given voltage VCC is connected to the gate leve of described thyristor successively by resistance R5, resistance R6, wherein resistance R5 shunt capacitance C2 forms strong circuits for triggering; In the pulse signal starting stage, the terminal voltage of electric capacity C2 is zero, and given voltage VCC directly acts on the gate pole of thyristor by resistance R5.Because resistance R5 resistance is less, larger initial trigger electric current can be produced, meet thyristor and trigger by force requirement (being generally 10-20 times of the specified gate current of thyristor).Impedance charges to stable state gradually along with electric capacity C2, and resistance R6 becomes current-limiting resistance.Steady-state current by given voltage VCC through R6 R5 connect and act on thyristor, because resistance R6 resistance is comparatively large, steady-state current is much less than initial big current, but still meets thyristor job requirement (being generally the 3-5 of specified gate current doubly).Therefore this trigger current achieves initial strong triggering, the low power function of stable state by the change of current-limiting impedance.
Pulse signal is by above circuit, and the high-low pressure that can realize drive circuit and main circuit is isolated; Forceful electric power high pressure effectively can be prevented by the reverse coupled in drive singal loop, decrease interference; The many disturbing pulse (burst pulse) less than correct pulse to width has filtering effect, overcomes interference; And realize the strong Trigger Function of small-power by impedance variation.The reliability service of final guarantee intermediate frequency power supply.
Claims (7)
1. an intermediate frequency power supply thyristor Fiber isolation drive circuit, connect pulse signal source and intermediate frequency power supply respectively, intermediate frequency power supply comprises several silicon controlled rectifiers; It is characterized in that, this Fiber isolation drive circuit described comprises:
Fiber isolation circuit, for one-way transmission light pulse signal;
Burst pulse filter circuit, for the pulse that active filtering instantaneous interference produces;
Strong circuits for triggering and impedance circuit, comprise a metal-oxide-semiconductor be connected with intermediate frequency power supply, for the gate pole of the thyristor of Direct driver silicon controlled rectifier;
In described Fiber isolation circuit, connecting a resistance in the former limit of fiber optic transmitter, and forms loop with pulse signal source; The secondary of fiber optic transmitter is connected to the former limit of fiber optic receiver by optical fiber communication line, the secondary of fiber optic receiver is connected to the input of burst pulse filter circuit, the output of burst pulse filter circuit is connected to the metal-oxide-semiconductor in strong circuits for triggering and impedance circuit, and connects the silicon controlled rectifier of intermediate frequency power supply by it.
2. Fiber isolation drive circuit according to claim 1, is characterized in that, described fiber optic transmitter comprises a light-emitting diode, and described resistance is connected to the positive pole of light-emitting diode; Described pulse signal source is connected with the negative pole of resistance and light-emitting diode respectively.
3. Fiber isolation drive circuit according to claim 1, is characterized in that, described fiber optic receiver comprises a photodiode, an amplifier and a triode; Described photodiode is connected on the input of amplifier, and the output of amplifier is connected with the base stage of triode, and the emitter of triode is connected with the grounding pin of amplifier and ground connection; Given voltage is connected to the energization pins of amplifier, for fiber optic receiver provides working power.
4. according to the Fiber isolation drive circuit described in claims 1 to 3 any one, it is characterized in that, described burst pulse filter circuit comprises 555 integrators, and its input is connected to given voltage by resistance, and input passes through capacity earth; The output of 555 integrators is connected to the grid of described metal-oxide-semiconductor by resistance.
5. Fiber isolation drive circuit according to claim 4, is characterized in that, described 555 integrators have 8 leads ends, and its input is that THR end and TRIG hold, and is connected to ground connection after same electric capacity; Given voltage is connected to R end and VCC end, for 555 integrators provide working power; Its output is Q end, is connected to the grid of described metal-oxide-semiconductor by a resistance.
6. according to the Fiber isolation drive circuit described in claims 1 to 3 any one, it is characterized in that, in described strong circuits for triggering and impedance circuit, the source ground of metal-oxide-semiconductor, its output is connected to the negative electrode of the thyristor of silicon controlled rectifier in intermediate frequency power supply.
7. according to the Fiber isolation drive circuit described in claims 1 to 3 any one, it is characterized in that, described strong circuits for triggering and impedance circuit also comprise two resistance of connecting and an electric capacity; Given voltage is connected to the gate leve of the thyristor of silicon controlled rectifier in intermediate frequency power supply successively by two resistance, described Capacitance parallel connection is on first resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410787191.0A CN104467381B (en) | 2014-12-17 | 2014-12-17 | A kind of intermediate frequency power supply IGCT Fiber isolation drive circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410787191.0A CN104467381B (en) | 2014-12-17 | 2014-12-17 | A kind of intermediate frequency power supply IGCT Fiber isolation drive circuit |
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| CN104467381A true CN104467381A (en) | 2015-03-25 |
| CN104467381B CN104467381B (en) | 2017-04-05 |
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| CN201410787191.0A Active CN104467381B (en) | 2014-12-17 | 2014-12-17 | A kind of intermediate frequency power supply IGCT Fiber isolation drive circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112752378A (en) * | 2019-10-29 | 2021-05-04 | 华润微集成电路(无锡)有限公司 | Silicon controlled rectifier dimming circuit |
| CN114679064A (en) * | 2022-04-12 | 2022-06-28 | 中国工程物理研究院流体物理研究所 | Integrated charging power supply |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202111674U (en) * | 2011-06-14 | 2012-01-11 | 株洲科瑞变流电气有限公司 | PWM signal driving device |
| CN103616547A (en) * | 2013-12-05 | 2014-03-05 | 杭州四达电炉成套设备有限公司 | Terminal voltage optical fiber isolating and sampling circuit and method of power semiconductor device |
| CN204361890U (en) * | 2014-12-17 | 2015-05-27 | 杭州四达电炉成套设备有限公司 | Intermediate frequency power supply thyristor Fiber isolation drive circuit |
-
2014
- 2014-12-17 CN CN201410787191.0A patent/CN104467381B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202111674U (en) * | 2011-06-14 | 2012-01-11 | 株洲科瑞变流电气有限公司 | PWM signal driving device |
| CN103616547A (en) * | 2013-12-05 | 2014-03-05 | 杭州四达电炉成套设备有限公司 | Terminal voltage optical fiber isolating and sampling circuit and method of power semiconductor device |
| CN204361890U (en) * | 2014-12-17 | 2015-05-27 | 杭州四达电炉成套设备有限公司 | Intermediate frequency power supply thyristor Fiber isolation drive circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112752378A (en) * | 2019-10-29 | 2021-05-04 | 华润微集成电路(无锡)有限公司 | Silicon controlled rectifier dimming circuit |
| CN112752378B (en) * | 2019-10-29 | 2023-01-20 | 华润微集成电路(无锡)有限公司 | Silicon controlled rectifier dimming circuit |
| CN114679064A (en) * | 2022-04-12 | 2022-06-28 | 中国工程物理研究院流体物理研究所 | Integrated charging power supply |
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| Publication number | Publication date |
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| CN104467381B (en) | 2017-04-05 |
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