CN102710330B - Compact PWM optic fiber converter - Google Patents
Compact PWM optic fiber converter Download PDFInfo
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- CN102710330B CN102710330B CN201210158318.3A CN201210158318A CN102710330B CN 102710330 B CN102710330 B CN 102710330B CN 201210158318 A CN201210158318 A CN 201210158318A CN 102710330 B CN102710330 B CN 102710330B
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Abstract
The present invention relates to a kind of compact PWM optic fiber converter, this optic fiber converter comprises housing and is arranged on circuit board and the power module of enclosure interior, circuit board is provided with power-converting circuit, PWM level shifting circuit, PWM change-over circuit and PWM feedback conversion circuit, wherein, the input of power-converting circuit is connected with power module.The present invention adopts modularized design, complete PWM level signal by PWM level shifting circuit, PWM change-over circuit and be converted into light signal, and be converted into PWM level signal by PWM feedback conversion circuit through light signal, achieve the mutual conversion between PWM level signal and light signal, and two IGBT up and down of same brachium pontis adopt conducting interlocking to connect, effectively prevent the situation of same brachium pontis conducting simultaneously, change the IGBT caused due to factors such as interference in pwm signal transmitting procedure to mislead, reduce the failure rate of IGBT; And power-converting circuit can provide two-way power supply to export simultaneously.
Description
Technical field
The present invention relates to a kind of optic fiber converter, specifically, relate to a kind of optic fiber converter being applied to IGBT driving in EMU and city railway train.
Background technology
The features such as optical fiber has transmission frequency bandwidth, speed is high, loss is low, the jamming performance of long transmission distance, anti lightning and electromagnetism is good, transmission error rates is low, reliability is high, volume is little, lightweight, are widely used in the communications.At present in train of high-speed motor train unit and city railway train, the driving of IGBT power model also uses Optical Fiber Transmission form mostly, its fundamental mode comprises PWM generator, PWM optical-electrical converter, Optical Fiber Transmission, IGBT driver, as shown in Figure 1, but photoelectric conversion section integrated level is not high, pwm signal is because the factors such as interference easily cause IGBT to mislead in transmitting procedure, and IGBT failure rate is high.
Summary of the invention
The present invention is directed to the optic fiber converter above shortcomings applied in existing bullet train and city railway train, provide a kind of compact PWM optic fiber converter, this optic fiber converter can realize mutually transforming between PWM level signal and light signal, change the IGBT caused due to factors such as interference in pwm signal transmitting procedure to mislead, reduce the failure rate of IGBT, two-way power supply can also be provided to export simultaneously.
Technical scheme of the present invention is: a kind of compact PWM optic fiber converter, this optic fiber converter comprises housing and is arranged on circuit board and the power module of enclosure interior, circuit board is provided with power-converting circuit, PWM level shifting circuit, PWM change-over circuit and PWM feedback conversion circuit, wherein, the input of power-converting circuit is connected with power module, and the input of DC110V voltage is converted to the output of DC15V voltage or DC15V input voltage is converted to the output of DC12V voltage; DC ± 15V level signal is converted to logic level signal by PWM level shifting circuit, and by PWM change-over circuit, the logic level signal after the conversion of PWM level shifting circuit is converted to light signal; The light signal that IGBT drive plate feeds back is converted to level signal by PWM feedback conversion circuit.
Preferably, power-converting circuit exports two-way power supply, and a road is that driving power exports, and output voltage is DC15V, and power output is 100W, and a road is that velocity transducer power supply exports, and output voltage is DC12V, and power output is 3W.
Preferably; power-converting circuit comprises power transfer module and the EMC electromagnetic compatibility protection module for the protection of circuit; wherein, EMC electromagnetic compatibility protection module comprises current foldback circuit, overvoltage crowbar, short-circuit protection circuit, EMI filter circuit, surge pulse suppression circuit, filter circuit and output filter circuit.
Preferably, the circuit input end mouth of PWM level shifting circuit adopts safety electric capacity and TVS to carry out electromagnetic compatibility protection, and by resistance R3, resistance R4, electric capacity C2 and electric capacity C6 discharge and recharge time setting signal filtering and Dead Time; And two IGBT up and down of same brachium pontis adopt conductings interlocking to connect, namely upper and lower two IGBT can only have one at every turn and are in conducting state, and another is in off state.
Preferably, the high-speed isolated optocoupler U2 for signal insulation blocking is also comprised in PWM level shifting circuit.
Preferably, DC ± 15V level signal is high level+15V, low level one 15V, signal frequency be the level signal of 1kHz-1.8kHz
Preferably, the logic level signal after the conversion of PWM level shifting circuit can be converted into≤the lightwave signal of 5MBd by PWM change-over circuit.
Preferably, the level signal after the conversion of PWM feedback conversion circuit, its high level is+15V, and low level is 0V.
Preferably, power module and housing bottom adopt aluminium alloy cushion block to be connected.
Preferably, housing is the shell be made up of aluminium alloy, and the surrounding of housing is provided with rectangular through hole.
The invention has the beneficial effects as follows: the present invention adopts modularized design, complete PWM level signal by PWM level shifting circuit, PWM change-over circuit and be converted into light signal, and be converted into PWM level signal by PWM feedback conversion circuit through light signal, achieve the mutual conversion between PWM level signal and light signal, and two IGBT up and down of same brachium pontis adopt conducting interlocking to connect, effectively prevent the situation of same brachium pontis conducting simultaneously, change the IGBT caused due to factors such as interference in pwm signal transmitting procedure to mislead, reduce the failure rate of IGBT; And power-converting circuit can provide two-way power supply to export simultaneously.Inventive shell is the shell be made up of aluminium alloy, the surrounding of housing is provided with rectangular through hole, ensure that the heat radiation of internal circuit board and power module, and power module and housing bottom adopt aluminium alloy cushion block to be connected, ensure the area of dissipation of power supply, improve the reliability of optic fiber converter.The present invention coordinates traction controller and pilot controller, can realize pulsed drive and the state feedback monitoring of IGBT.
Accompanying drawing explanation
Accompanying drawing 1 is the structured flowchart of specific embodiment of the invention power-converting circuit.
Accompanying drawing 2 is the circuit diagram of specific embodiment of the invention PWM level shifting circuit.
Accompanying drawing 3 is the circuit diagram of specific embodiment of the invention photoelectric switching circuit.
Accompanying drawing 4 is the circuit diagram of specific embodiment of the invention PWM feedback conversion circuit.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
A kind of compact PWM optic fiber converter, this optic fiber converter comprises housing and is arranged on circuit board and the power module of enclosure interior, and power module and housing bottom adopt aluminium alloy cushion block to be connected; Housing is the shell be made up of aluminium alloy, and the surrounding of housing is provided with rectangular through hole.Circuit board is provided with power-converting circuit, PWM level shifting circuit, PWM change-over circuit and PWM feedback conversion circuit, wherein, the input of power-converting circuit is connected with power module, and the input of DC110V voltage is converted to the output of DC15V voltage or DC15V input voltage is converted to the output of DC12V voltage; DC ± 15V level signal is converted to logic level signal by PWM level shifting circuit, and by PWM change-over circuit, the logic level signal after changing through PWM level shifting circuit being converted to the≤light signal of 5MBd, DC ± 15V level signal is high level+15V, low level one 15V, signal frequency are the level signal of 1kHz-1.8kHz; The light signal that IGBT drive plate feeds back is converted to level signal by PWM feedback conversion circuit, and its high level is+15V, and low level is 0V.
Power-converting circuit exports two-way power supply, and a road is that driving power exports, and output voltage is DC15V, and power output is 100W, and a road is that velocity transducer power supply exports, and output voltage is DC12V, and power output is 3W; Power-converting circuit comprises power transfer module and the EMC electromagnetic compatibility protection module for the protection of circuit; wherein, EMC electromagnetic compatibility protection module comprises current foldback circuit, overvoltage crowbar, short-circuit protection circuit, EMI filter circuit, surge pulse suppression circuit, filter circuit and output filter circuit.
The circuit input end mouth of PWM level shifting circuit adopts safety electric capacity and TVS to carry out electromagnetic compatibility protection, and by resistance R3, resistance R4, electric capacity C2 and electric capacity C6 discharge and recharge time setting signal filtering and Dead Time; And two IGBT up and down of same brachium pontis adopt conductings interlocking to connect, namely upper and lower two IGBT can only have one at every turn and are in conducting state, and another is in off state, effectively prevent the situation of same brachium pontis conducting simultaneously; The high-speed isolated optocoupler U2 for signal insulation blocking is also comprised in PWM level shifting circuit.
Operation principle:
Power conversion: power-converting circuit is that DC15V voltage exports by power module input DC110V photovoltaic conversion, and export as drive current source, power output is 100W; And DC15V input voltage is converted into the output of DC12V voltage, export as velocity transducer power supply, power output is 3W.
DC ± 15V level signal is converted into light signal: DC ± 15V level signal is converted into logic level signal by PWM level shifting circuit, then is converted into light signal by PWM change-over circuit, and light signal can reach 5MBd.
Light signal is converted into PWM level signal: PWM feedback signal is the light signal that IGBT drive plate sends, and by PWM feedback conversion circuit, lightwave signal is converted into level signal, the level signal after conversion, and its high level is+15V, and low level is 0V.
Claims (8)
1. a compact PWM optic fiber converter, it is characterized in that: this optic fiber converter comprises housing and is arranged on circuit board and the power module of enclosure interior, circuit board is provided with power-converting circuit, PWM level shifting circuit, PWM change-over circuit and PWM feedback conversion circuit, wherein, the input of power-converting circuit is connected with power module, and the input of DC110V voltage is converted to the output of DC15V voltage and DC15V input voltage is converted to the output of DC12V voltage; DC ± 15V level signal is converted to logic level signal by PWM level shifting circuit, and by PWM change-over circuit, the logic level signal after the conversion of PWM level shifting circuit is converted to light signal; The light signal that IGBT drive plate sends is converted to level signal by PWM feedback conversion circuit; The circuit input end mouth of PWM level shifting circuit adopts safety electric capacity and TVS to carry out electromagnetic compatibility protection, and by resistance R3, resistance R4, electric capacity C2 and electric capacity C6 discharge and recharge time setting signal filtering and Dead Time; And two IGBT up and down of same brachium pontis adopt conducting interlocking to connect, upper and lower two IGBT can only have one at every turn and be in conducting state, and another is in off state; The high-speed isolated optocoupler U2 for signal insulation blocking is also comprised in PWM level shifting circuit.
2. compact PWM optic fiber converter according to claim 1, it is characterized in that: power-converting circuit exports two-way power supply, one tunnel is that driving power exports, output voltage is DC15V, power output is 100W, one tunnel is that velocity transducer power supply exports, and output voltage is DC12V, and power output is 3W.
3. compact PWM optic fiber converter according to claim 2; it is characterized in that: power-converting circuit comprises power transfer module and the EMC electromagnetic compatibility protection module for the protection of circuit; wherein, EMC electromagnetic compatibility protection module comprises current foldback circuit, overvoltage crowbar, short-circuit protection circuit, EMI filter circuit, surge pulse suppression circuit, filter circuit and output filter circuit.
4. compact PWM optic fiber converter according to claim 1, is characterized in that: DC ± 15V level signal is high level+15V, low level-15V, signal frequency are the level signal of 1kHz-1.8kHz.
5. compact PWM optic fiber converter according to claim 1, is characterized in that: the logic level signal after the conversion of PWM level shifting circuit is converted into the≤lightwave signal of 5MBd by PWM change-over circuit.
6. compact PWM optic fiber converter according to claim 1, is characterized in that: the level signal after the conversion of PWM feedback conversion circuit, its high level is+15V, and low level is 0V.
7. compact PWM optic fiber converter according to claim 1, is characterized in that: power module and housing bottom adopt aluminium alloy cushion block to be connected.
8. compact PWM optic fiber converter according to claim 1, it is characterized in that: housing is the shell be made up of aluminium alloy, the surrounding of housing is provided with rectangular through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210158318.3A CN102710330B (en) | 2012-05-22 | 2012-05-22 | Compact PWM optic fiber converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210158318.3A CN102710330B (en) | 2012-05-22 | 2012-05-22 | Compact PWM optic fiber converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102710330A CN102710330A (en) | 2012-10-03 |
| CN102710330B true CN102710330B (en) | 2015-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210158318.3A Expired - Fee Related CN102710330B (en) | 2012-05-22 | 2012-05-22 | Compact PWM optic fiber converter |
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| CN (1) | CN102710330B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616632B (en) * | 2013-11-23 | 2016-05-11 | 大连尚能科技发展有限公司 | Photoelectric switching circuit test fixture and method of testing |
| CN105471234B (en) * | 2015-12-16 | 2018-02-23 | 山西惠特科技有限公司 | Fiber-optic signal change-over circuit for the driving of 3300V high-power IGBTs |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190010C (en) * | 2002-09-06 | 2005-02-16 | 清华大学 | Large capacity insulation grating bipolar transistor driving circuit |
| CN201072860Y (en) * | 2007-09-24 | 2008-06-11 | 深圳市英威腾电气股份有限公司 | High tension great current IGBT driver |
| CN201369668Y (en) * | 2008-12-03 | 2009-12-23 | 天津华云自控股份有限公司 | IGBT driving circuit driven by optical fiber through isolation |
| CN201937469U (en) * | 2011-02-15 | 2011-08-17 | 青岛四方车辆研究所有限公司 | DC 110V to DC 24V power supply module |
| CN102263490A (en) * | 2011-08-09 | 2011-11-30 | 湖南中科电气股份有限公司 | High-voltage frequency converter power unit drive-pulse transmission and communication system |
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2012
- 2012-05-22 CN CN201210158318.3A patent/CN102710330B/en not_active Expired - Fee Related
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| CN102710330A (en) | 2012-10-03 |
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Address after: 266000 No. 231, Ruichang Road, Sifang District, Shandong, Qingdao Patentee after: CRRC QINGDAO SIFANG ROLLING STOCK RESEARCH INSTITUTE Co.,Ltd. Address before: 266000 No. 231, Ruichang Road, Sifang District, Shandong, Qingdao Patentee before: QINGDAO SIFANG ROLLING STOCK RESEARCH INSTITUTE Co.,Ltd. |
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