CN104362864A - Feedback method and device based on photoelectric coupler voltage phase detecting - Google Patents
Feedback method and device based on photoelectric coupler voltage phase detecting Download PDFInfo
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- CN104362864A CN104362864A CN201410505520.8A CN201410505520A CN104362864A CN 104362864 A CN104362864 A CN 104362864A CN 201410505520 A CN201410505520 A CN 201410505520A CN 104362864 A CN104362864 A CN 104362864A
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Classifications
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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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/18—Indicating phase sequence; Indicating synchronism
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The invention relates to a circuit and a method based on photoelectric coupler voltage phase detecting. The circuit includes a coupling circuit, a CPLD control circuit and a feedback drive circuit. The method includes the steps of firstly, each phase of voltage of three-phase voltage is converted into a low-voltage digital level signal through two semi-wave photoelectric couplers; secondly, the secondary output digital level signal of one photoelectric coupler is detected, the secondary output digital level signal of one photoelectric coupler in each phase is detected, the upper bridge arm IGBT in the same phase of a feedback/rectifying circuit is controlled to conduct to judge the phase information of a voltage signal when the level is a high level, and the feedback drive circuit is controlled to drive the IGBT to conduct 120 degrees in one cycle. The circuit and the method have the advantages that high interference resistance is achieved, only one CPLD is needed inside a power unit, one DSP chip is omitted, cost is lowered, and reliability is increased.
Description
Technical field
The present invention relates to a kind of feedback/method for rectifying detecting voltage-phase based on optocoupler, in particular, be applied in the feedback/method for rectifying detecting voltage-phase in high-tension boost machine transducer power unit based on optocoupler.
Background technology
Elevator frequency converter operates in four-quadrant, the state of electric power generation will be there is, when motor is in generating state, just charge to the power cell of high-tension boost machine frequency converter, the busbar voltage of power cell is caused to raise, for restriction busbar voltage raises, ensure the normal operation of elevator frequency converter, must processing motor to generate electricity the energy brought to power cell.
Originally be pass through discharge resistance, fault offset is fallen, but which results in the waste of the energy, what use on the market at present is all recycled to electrical network by energy feedback, the method used is the phase place of the AD sampling pin detection of grid voltage by DSP, and produce PWM feedback signal, feed back to electrical network by inductance, in power cell, must rectifier bridge be added.The method of this method detection of grid voltage-phase is complicated, and gathers voltage-phase by the method that AD samples, and is easily disturbed, and the method producing PWM feedback is complicated, and device is many, and cost is high.
Summary of the invention
The object of the invention is the deficiency existed for prior art, provide a kind of method and apparatus detecting voltage-phase based on optocoupler.
The circuit of voltage-phase is detected: comprise coupling circuit based on optocoupler, CPLD control circuit, feedback/rectification circuit, coupling circuit comprises six photoelectrical couplers, the elementary input of photoelectrical coupler connects according to three phase half wave rectification form, the secondary output of photoelectrical coupler is connected to the signal input part of CPLD control circuit, the control output end of CPLD control circuit connects feedback drive circuit, feedback/rectification circuit drives the three phase half wave rectification form be made up of 6 IGBT to connect, three phase mains connects described feedback/rectification circuit, A phase two photoelectrical couplers are connected respectively to the upper brachium pontis of the A phase of feedback/commutation driver circuit by CPLD control circuit, the control end of the IGBT of lower brachium pontis, B phase two photoelectrical couplers are connected respectively to the upper brachium pontis of the B phase of feedback/commutation driver circuit by CPLD control circuit, the control end of the IGBT of lower brachium pontis, C phase two photoelectrical couplers are connected respectively to the upper brachium pontis of the C phase of feedback/commutation driver circuit by CPLD control circuit, the control end of the IGBT of lower brachium pontis, feedback/commutation driver circuit output connects the inversion IGBT loop of power cell.
In foregoing circuit, the secondary output of photoelectrical coupler is that OC door exports, and exports 5V and 0V level, be converted to 3.3V and 0V level, then input the input of CPLD control circuit by level shifting circuit after connecting pull-up resistor.
In foregoing circuit, the control output end of CPLD control circuit is 3.3V and 0V level, is converted to 5V and 0V level, is connected to the control end of the IGBT in feedback drive circuit by level shifting circuit.
The feedback method of voltage-phase is detected: the every phase voltage in (1) three-phase voltage is converted to low-voltage digital signal level through two halves glistening light of waves electric coupling based on optocoupler; (2) detect every mutually in the secondary output digital signal level of a photoelectrical coupler, when level is high level, control the upper brachium pontis IGBT conducting in the homophase of feedback/rectification circuit, be used for judging the phase information of voltage signal, control feedback drive circuit and drive IGBT one-period conducting 120 degree.
For improving fault-tolerant ability, detect every mutually in the secondary output digital signal level of another photoelectrical coupler, when level is low level, control the lower brachium pontis IGBT conducting in the homophase of feedback/rectification circuit, each IGBT is controlled by a photoelectrical coupler voltage detection signal, between voltage detection signal, there is corrective, improve system reliability.
Compared with prior art the present invention has following obvious advantage: voltage-phase testing circuit control program of the present invention, adopt the form of optocoupler, the analog signals of voltage is converted into digital quantity signal, by the phase information collecting voltage of digital quantity signal, antijamming capability is strong, for the collection of digital quantity signal, power cell internal only needs a CPLD to complete, compared with the scheme of DSP+CPLD in present control circuit, reduce by a dsp chip, reduce costs, improve reliability, novel control program, do not need reactor and rectifier bridge simultaneously, reduce costs further.
Accompanying drawing explanation
Fig. 1 is input voltage phase Cleaning Principle figure;
Fig. 2 is the level relationship figure that input voltage phase and upper brachium pontis IGBT control optocoupler and export;
Fig. 3 is the level relationship figure that input voltage phase and lower brachium pontis IGBT control optocoupler and export;
Fig. 4 is the graph of a relation that upper brachium pontis IGBT controls optocoupler output and feedback drive singal;
Fig. 5 is the graph of a relation that lower brachium pontis IGBT controls optocoupler output and feedback drive singal;
Fig. 6 is high-tension boost machine transducer power unit system block diagram;
Fig. 7 is feedback circuit and power cell major loop figure;
In figure:
1-A phase inputs phase voltage VA, and 2-upper bridge optocoupler VAU exports;
3-A phase inputs phase voltage VA, and under 4-, bridge optocoupler VAD exports;
5-upper bridge optocoupler VAU exports, brachium pontis IGBT drive singal in 6-A phase;
Under 7-, bridge optocoupler VAD exports, the lower brachium pontis IGBT drive singal of 8-A phase;
9-coupling circuit, 10-CPLD control circuit, 11-master control system, 12-inversion IGBT loop, 13-inverse changing driving circuit, 14-feedback drive circuit, 15-feedback/rectification circuit.
Embodiment
Illustrate that the present invention is described in further detail with embodiment below in conjunction with accompanying drawing:
As Fig. 1, Fig. 6, the circuit detecting voltage-phase based on optocoupler shown in Fig. 7: comprise the coupling circuit 9 for detected phase, CPLD control circuit 10, feedback/rectification circuit 15, coupling circuit 9 comprises six photoelectrical couplers, the elementary input of photoelectrical coupler connects according to three phase half wave rectification form, the secondary output of photoelectrical coupler is that OC door exports, 5V and 0V level is exported after connecting pull-up resistor, 3.3V and 0V level is converted to by level shifting circuit, input the input of CPLD control circuit again, the control output end of CPLD control circuit 10 is 3.3V and 0V level, 5V and 0V level is converted to by feedback circuit 14, be connected to the control end of the IGBT in feedback/rectification circuit 15.
CPLD control circuit 10 is to master control system 11 transfer unit fault, and master control system 11 transmits the pwm signal of starting-up signal and inversion feedback to power cell, and transmission means is high speed fibre.CPLD control circuit 10, when receiving the starting-up signal of master control system 11, sends pwm signal to inverse changing driving circuit 13, and inverse changing driving circuit 13 drives inversion IGBT loop 12, and power cell starts normal output waveform.
The three phase half wave rectification form that feedback/rectification circuit 15 is made up of 6 IGBT connects, three phase mains connects feedback/rectification circuit 15, A phase two photoelectrical couplers E1, E4 are connected respectively to the upper brachium pontis of A phase of feedback/rectification circuit 15, the control end of the IGBT of lower brachium pontis by CPLD control circuit 10 and feedback drive circuit 14, namely be connected with S1, S2, VAU, VAD are the output of the upper and lower brachium pontis of A phase of CPLD control circuit 10, and R4, R7 are pull-up resistor.
B phase two photoelectrical couplers E2, E5 are connected respectively to the upper brachium pontis of B phase of feedback drive circuit, the control end of the IGBT of lower brachium pontis by CPLD control circuit, namely be connected with S3, S4, VBU, VBD are the output of the upper and lower brachium pontis of B phase of CPLD control circuit 10, and R5, R8 are pull-up resistor.
C phase two photoelectrical couplers E3, E6 are connected respectively to the upper brachium pontis of C phase of feedback drive circuit, the control end of the IGBT of lower brachium pontis by CPLD control circuit, namely be connected with S5, S6, VCU, VCD are the output of the upper and lower brachium pontis of C phase of CPLD control circuit 10, and R6, R9 are pull-up resistor.
Feedback/rectification circuit 15 output connects the inversion circuit 12 of power cell.
The feedback method of voltage-phase is detected: the every phase voltage in (1) three-phase voltage is converted to low-voltage digital signal level through two halves glistening light of waves electric coupling based on optocoupler; (2) the secondary output digital signal level of a photoelectrical coupler is detected, when level is high level, control the IGBT conducting of the upper brachium pontis of feedback drive circuit, be used for judging the phase information of voltage signal, control feedback drive circuit driving IGBT one-period conducting 120 degree.
For improving fault-tolerant ability, detect the secondary output digital signal level of another photoelectrical coupler, when level is low level, control the IGBT conducting of the lower brachium pontis of feedback drive circuit, the corresponding photoelectrical coupler voltage detection signal of each IGBT, between voltage detection signal, there is corrective, improve system reliability.
For A phase, in Fig. 2, A phase inputs phase voltage VA1 and to be converted on low-voltage digital signal level bridge optocoupler VAU through a photoelectrical coupler and to export 2, A phase and input phase voltage VA3 and be converted to bridge optocoupler VAU on low-voltage digital signal level through another photoelectrical coupler and export 4.
The phase place input CPLD control circuit 10 of the three-phase input voltage gathered, according to the phase range of output level zero crossing saltus step determination voltage, when CPLD is created on saltus step at zero point automatically, IGBT opens the delay of 30 ° and advanced, therefore in the phase place of a phase input voltage within the scope of 30 ° ~ 150 °, open the IGBT of the upper brachium pontis of feedback drive circuit 15, in the phase place of a phase input voltage within the scope of 210 ° ~ 330 °, open the IGBT of the lower brachium pontis of feedback drive circuit 15.
In Fig. 5 upper bridge optocoupler VAU export 5 when saltus step at zero point during saltus step at zero point IGBT have the delay of 30 ° and advanced, in A phase brachium pontis IGBT drive singal 6 after the hopping edge of level 30 ° open-minded, 30 ° of shutoffs before the hopping edge of level, namely, within the scope of 30 ° ~ 150 °, 120 ° are opened in the positive axis part of input voltage; Lower bridge optocoupler VAU export 7 when saltus step at zero point during saltus step at zero point IGBT have the delay of 30 ° and advanced, the lower brachium pontis IGBT drive singal 8 of A phase after the hopping edge of level 30 ° open-minded, 30 ° of shutoffs before the hopping edge of level, namely, within the scope of 210 ° ~ 330 °, 120 ° are opened at negative half shaft portion of input voltage.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the circuit of voltage-phase is detected based on optocoupler, comprise coupling circuit, CPLD control circuit, feedback/rectification circuit, it is characterized in that: described coupling circuit comprises six photoelectrical couplers, the elementary input of described photoelectrical coupler connects according to three phase half wave rectification form, the secondary output of described photoelectrical coupler is connected to the signal input part of described CPLD control circuit, the control output end of described CPLD control circuit connects described time/rectification circuit, described feedback/rectification circuit drives the three phase half wave rectification form be made up of 6 IGBT to connect, three phase mains connects described feedback/rectification circuit, A phase two photoelectrical couplers are connected respectively to the upper brachium pontis of the A phase of described feedback/rectification circuit by described CPLD control circuit, the control end of the IGBT of lower brachium pontis, B phase two photoelectrical couplers are connected respectively to the upper brachium pontis of the B phase of described feedback/rectification circuit by described CPLD control circuit, the control end of the IGBT of lower brachium pontis, C phase two photoelectrical couplers are connected respectively to the upper brachium pontis of the C phase of described feedback/rectification circuit by described CPLD control circuit, the control end of the IGBT of lower brachium pontis, described feedback drive circuit output connects the inversion IGBT loop of power cell.
2. the circuit detecting voltage-phase based on optocoupler according to claim 1, it is characterized in that: the secondary output of described photoelectrical coupler is that OC door exports, 5V and 0V level is exported after connecting pull-up resistor, 3.3V and 0V level is converted to, the described input inputting CPLD control circuit again by level shifting circuit.
3. the according to claim 1 circuit detecting voltage-phase based on optocoupler, it is characterized in that: the control output end of described CPLD control circuit is 3.3V and 0V level, be converted to 5V and 0V level by level shifting circuit, be connected to the control end of the IGBT in described feedback drive circuit.
4. detect the feedback method of voltage-phase based on optocoupler, it is characterized in that: the every phase voltage in (1) three-phase voltage is converted to low-voltage digital signal level through two halves glistening light of waves electric coupling; (2) detect every mutually in the secondary output digital signal level of a photoelectrical coupler, when level is high level, control the upper brachium pontis IGBT conducting in the homophase of feedback/rectification circuit.
5. the feedback method detecting voltage-phase based on optocoupler according to claim 4, it is characterized in that: detect every mutually in the secondary output digital signal level of another photoelectrical coupler, when level is low level, control the lower brachium pontis IGBT conducting in the homophase of feedback/rectification circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410505520.8A CN104362864A (en) | 2014-09-26 | 2014-09-26 | Feedback method and device based on photoelectric coupler voltage phase detecting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410505520.8A CN104362864A (en) | 2014-09-26 | 2014-09-26 | Feedback method and device based on photoelectric coupler voltage phase detecting |
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| CN104362864A true CN104362864A (en) | 2015-02-18 |
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| CN201410505520.8A Pending CN104362864A (en) | 2014-09-26 | 2014-09-26 | Feedback method and device based on photoelectric coupler voltage phase detecting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109264316A (en) * | 2018-10-29 | 2019-01-25 | 安徽中科光电色选机械有限公司 | A kind of more vibrator control devices of color selector |
| CN110932578A (en) * | 2019-12-31 | 2020-03-27 | 新风光电子科技股份有限公司 | Energy feedback control circuit of four-quadrant frequency converter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003158878A (en) * | 2001-11-20 | 2003-05-30 | Mitsubishi Electric Corp | Power factor improving device |
| CN101584107A (en) * | 2007-01-24 | 2009-11-18 | 松下电器产业株式会社 | DC power supply device and air conditioner using the same |
| CN103155393A (en) * | 2010-10-13 | 2013-06-12 | 三菱电机株式会社 | Three-phase ac to dc converter and air conditioning apparatus using three-phase ac to dc converter |
-
2014
- 2014-09-26 CN CN201410505520.8A patent/CN104362864A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003158878A (en) * | 2001-11-20 | 2003-05-30 | Mitsubishi Electric Corp | Power factor improving device |
| CN101584107A (en) * | 2007-01-24 | 2009-11-18 | 松下电器产业株式会社 | DC power supply device and air conditioner using the same |
| CN103155393A (en) * | 2010-10-13 | 2013-06-12 | 三菱电机株式会社 | Three-phase ac to dc converter and air conditioning apparatus using three-phase ac to dc converter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109264316A (en) * | 2018-10-29 | 2019-01-25 | 安徽中科光电色选机械有限公司 | A kind of more vibrator control devices of color selector |
| CN110932578A (en) * | 2019-12-31 | 2020-03-27 | 新风光电子科技股份有限公司 | Energy feedback control circuit of four-quadrant frequency converter |
| CN110932578B (en) * | 2019-12-31 | 2023-01-10 | 新风光电子科技股份有限公司 | Energy feedback control circuit of four-quadrant frequency converter |
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