CN101764525A - Vector transducer with low electromagnetic interference - Google Patents
Vector transducer with low electromagnetic interference Download PDFInfo
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- CN101764525A CN101764525A CN201010113509A CN201010113509A CN101764525A CN 101764525 A CN101764525 A CN 101764525A CN 201010113509 A CN201010113509 A CN 201010113509A CN 201010113509 A CN201010113509 A CN 201010113509A CN 101764525 A CN101764525 A CN 101764525A
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- circuit
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- transducer
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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
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/123—Suppression of common mode voltage or current
Abstract
The invention relates to a vector transducer with low electromagnetic interference, in particular to a vector transducer, which comprises a rectifier circuit, an electrifying cushion circuit, a normal wave circuit, a power leak circuit and a contravariant circuit, wherein the front end of the rectifier circuit is provided with a filter circuit, and electric networks L1, L2 and L3 are connected with the rectifier circuit by the filter circuit, thereby harmonic waves and conduction interference are filtered by the filter circuit without influencing the working capability of the transducer. When the transducer works, harmonic waves and conduction noise produced by a space vector module regulating method of the transducer are filtered by the filter circuit in the same way, the interference for the electric networks which is produced by the transducer is reduced, the pollution to the electric networks is avoided, and the invention is applied to controlling frequency control of an alternator.
Description
Technical field
The present invention relates to vector frequency converter, is a kind of vector frequency converter of low electromagnetic interference specifically.
Background technology
We know, existing vector frequency converter comprises rectification circuit, the buffer circuit that powers on, flat wave circuit, energy leadage circuit and inverter circuit.Rectification circuit is made up of 6 diodes, is composed in series a brachium pontis in twos, and three brachium pontis are in parallel again, and the centre of three brachium pontis links to each other with electrical network L1, L2, L3 respectively, is used for three-phase alternating current is rectified into direct current; The buffer circuit that powers on is composed in parallel by relay normally open contact K1 and resistance R, the charging current of flat wave circuit electrochemical capacitor when being used for reducing to power on; Flat wave circuit is by electrochemical capacitor C15, C16 series connection, and R1 and R2 are composed in series, and with its intermediate point short circuit, are used to reduce the pulsation of direct voltage then; The energy leadage circuit is composed in series with IGBT Q7 by resistance R 3 is in parallel with diode D7 again, the feedback energy of motor when being used to release the frequency converter braking; Inverter circuit is made up of 6 IGBT Q1, Q2, Q3, Q4, Q5 and Q6, each IGBT is connected with diode D8, D9, D10, D11, D12, D13 inverse parallel respectively, being used for dc inverter is amplitude and all adjustable three-phase alternating current of frequency, and antiparallel 6 diodes provide the afterflow path for the electromotor feedback energy when frequency converter is braked.This vector frequency converter because line voltage has harmonic wave and conducted interference, influences the service behaviour of frequency converter; During frequency converter work,, electrical network is produced interference, pollutes electrical network because the space vector modulating method of frequency converter can produce complicated harmonic wave and conducted interference.
Technical scheme
The technical problem that the present invention solves is that harmonic wave in the solution line voltage and conducted interference are to the influence of frequency converter service behaviour; Frequency converter produces complicated harmonic wave and conducted interference produces the problem of disturbing, polluting electrical network to electrical network.A kind of harmonic wave and conducted interference that can reduce in the line voltage is provided, do not influence the service behaviour of frequency converter; In frequency converter when work,, harmonic wave and conducted interference that the space vector modulating method of frequency converter produces are filtered equally, reduce frequency converter to the interference that electrical network produces, and avoid the vector frequency converter of low electromagnetic interference that electrical network is polluted.
Technical scheme of the present invention is, the vector frequency converter of low electromagnetic interference comprises rectification circuit, the buffer circuit that powers on, flat wave circuit, energy leadage circuit and inverter circuit, the primary structure characteristics are, the rectification circuit front end is provided with filter circuit, and electrical network L1, L2, L3 are connected with rectification circuit through filter circuit.
Filter circuit of the present invention is that the end of capacitor C 1, C2, C3 links to each other with electrical network L1, L2, L3 respectively, the other end is connected on an end of capacitor C 4 jointly, the C4 other end is connected on safely on the PE, the end of capacitor C 5, C6, C7 is connected on respectively between three terminal a, b, the c of electrical network L1, L2, L3 and inductance L, and the other end is connected on safely on the PE.Piezo-resistance RV1, RV2, RV3 are connected on respectively between electrical network L1-L2, L2-L3, the L3-L1, inductance L is the three-phase common mode inductance, every phase structure is identical, and on same iron core, the end of capacitor C 8, C9, C10 is connected on respectively on other three terminal f, e, the d of inductance L, other end access security ground PE, the end of capacitor C 11, C12, C13 is connected on respectively after capacitor C 8, C9, C10 on three terminal f, e, the d of inductance L, the other end is connected on an end of capacitor C 14 jointly, the other end access security ground PE of C14.
The invention has the beneficial effects as follows that because the rectification circuit front end is provided with filter circuit, electrical network L1, L2, L3 are connected with rectification circuit through filter circuit, filter circuit can filter harmonic wave and the conducted interference in the line voltage, does not influence the service behaviour of frequency converter; During frequency converter work, the same filtered circuit of harmonic wave that the space vector modulating method of frequency converter produces and conducted interference filters, and reduces frequency converter to the interference that electrical network produces, and avoids electrical network is polluted.The present invention is applicable to the variable frequency regulating speed control to alternating current motor.
Description of drawings
Accompanying drawing is a circuit structure schematic diagram of the present invention.
Embodiment
The vector frequency converter of a kind of low electromagnetic interference as shown in the figure, comprise rectification circuit 2, the buffer circuit 3 that powers on, flat wave circuit 4, energy leadage circuit 5 and inverter circuit 6, rectification circuit 2 front ends are provided with filter circuit 1, and electrical network L1, L2, L3 are connected with rectification circuit 2 through filter circuit 1.Filter circuit 1 is that the end of capacitor C 1, C2, C3 links to each other with electrical network L1, L2, L3 respectively; the other end is connected on an end of capacitor C 4 jointly; the other end of C4 is connected on safely on the PE; the end of capacitor C 5, C6, C7 is connected on respectively between three terminal a, b, the c of electrical network L1, L2, L3 and inductance L; the other end is connected on safely on the PE; piezo-resistance RV1, RV2, RV3 are connected on respectively between electrical network L1-L2, L2-L3, the L3-L1, and its effect is to absorb surge current and overvoltage protection.Inductance L is the three-phase common mode inductance, and every phase structure is identical, and on same iron core, its effect is to filter the common mode electromagnetic interference.The end of capacitor C 8, C9, C10 is connected on respectively on other three terminal f, e, the d of inductance L, other end access security ground PE, the end of capacitor C 11, C12, C13 is connected on respectively after capacitor C 8, C9, C10 on three terminal f, e, the d of inductance L, the other end is connected on an end of capacitor C 14 jointly, the other end access security ground PE of C14.Rectification circuit 2 is made up of 6 diodes, is composed in series a brachium pontis in twos, and three brachium pontis are in parallel again, is used for three-phase alternating current is rectified into direct current, and the centre of three brachium pontis is connected on respectively on three terminal d, e, the f of inductance L.The buffer circuit 3 that powers on is composed in parallel by relay normally open contact K1 and resistance R, the charging current of flat wave circuit electrochemical capacitor when being used for reducing to power on.Flat wave circuit 4 is by electrochemical capacitor C15, C16 series connection, and R1 and R2 are composed in series, and with its intermediate point short circuit, are used to reduce the pulsation of direct voltage then.Energy leadage circuit 5 is composed in series with IGBT Q7 by resistance R 3 is in parallel with diode D7 again, the feedback energy of motor when being used to release the frequency converter braking.Inverter circuit 6 is made up of 6 IGBT Q1, Q2, Q3, Q4, Q5 and Q6, each IGBT also respectively with a diode inverse parallel, they are D8, D9, D10, D11, D12 and D13, being used for dc inverter is the three-phase alternating current of amplitude and frequency adjustable.
When being input as 380V, during the 50Hz alternating current, inductance L is the three-phase common mode inductance in the filter circuit 1, can suppress the common mode electromagnetic interference that frequency converter produces electrical network.C1, C2, C3, C11, C12, C13 are X series common mode capacitance, can suppress common mode disturbances equally.By selecting different capacitances, can filter specific interference band.C4, C5, C6, C7, C8, C9, C10 and C14 are Y series differential mode capacitors, can suppress differential mode interference.On general structure, whole filter circuit is a π type three rank filter circuits, and this filter circuit filter effect reaches more than the 60dB, and is more remarkable than the filter effect of second order or first-order filtering circuit.
Claims (2)
1. the vector frequency converter of a low electromagnetic interference, comprise rectification circuit, the buffer circuit that powers on, flat wave circuit, energy leadage circuit and inverter circuit, it is characterized in that: the rectification circuit front end is provided with filter circuit, and electrical network L1, L2, L3 are connected with rectification circuit through filter circuit.
2. the vector frequency converter of low electromagnetic interference according to claim 1, it is characterized in that: said filter circuit is a capacitor C 1, C2, the end of C3 respectively with electrical network L1, L2, L3 links to each other, the other end is connected on an end of capacitor C 4 jointly, the C4 other end is connected on safely on the PE, capacitor C 5, C6, the end of C7 is connected on electrical network L1 respectively, L2, three terminal a of L3 and inductance L, b, between the c, the other end is connected on safely on the PE, piezo-resistance RV1, RV2, RV3 is connected on electrical network L1-L2 respectively, L2-L3, between the L3-L1, inductance L is the three-phase common mode inductance, every phase structure is identical, and on same iron core, capacitor C 8, C9, the end of C10 is connected on other three terminal f of inductance L respectively, e, on the d, other end access security ground PE, capacitor C 11, C12, the end of C13 is in capacitor C 8, C9, be connected on three terminal f of inductance L after the C10 respectively, e, on the d, the other end is connected on an end of capacitor C 14 jointly, the other end access security ground PE of C14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101135099A CN101764525B (en) | 2010-02-11 | 2010-02-11 | Vector transducer with low electromagnetic interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101135099A CN101764525B (en) | 2010-02-11 | 2010-02-11 | Vector transducer with low electromagnetic interference |
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| Publication Number | Publication Date |
|---|---|
| CN101764525A true CN101764525A (en) | 2010-06-30 |
| CN101764525B CN101764525B (en) | 2013-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101135099A Expired - Fee Related CN101764525B (en) | 2010-02-11 | 2010-02-11 | Vector transducer with low electromagnetic interference |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516183A (en) * | 2013-09-30 | 2014-01-15 | 无锡洲翔成套焊接设备有限公司 | Spraying power supply three-phase filter |
| CN104158390A (en) * | 2013-05-13 | 2014-11-19 | 大连普传科技股份有限公司 | Vector frequency converter |
| CN109888982A (en) * | 2019-03-18 | 2019-06-14 | 中国重汽集团大同齿轮有限公司 | Slide variable speed electric motors, particularly |
| CN110676827A (en) * | 2018-07-03 | 2020-01-10 | 丹佛斯电力电子有限公司 | Power electronic device |
| CN110957947A (en) * | 2019-12-10 | 2020-04-03 | 广东美的制冷设备有限公司 | Drive control circuit of motor, motor and household appliance |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002057542A (en) * | 2000-08-09 | 2002-02-22 | Soshin Electric Co Ltd | Line filter for power converter |
| CN2854917Y (en) * | 2005-12-02 | 2007-01-03 | 天津市康力科技发展公司 | Device for reducing surge and higher harmonic |
| CN101013854A (en) * | 2007-02-08 | 2007-08-08 | 北京航空航天大学 | Main circuit of converter with input compatibility of single phase and three phase |
| CN101051814A (en) * | 2006-04-04 | 2007-10-10 | 上海雷诺尔电气有限公司 | Variable frequency speed regulator capable of supperssing producing resonant wave |
-
2010
- 2010-02-11 CN CN2010101135099A patent/CN101764525B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002057542A (en) * | 2000-08-09 | 2002-02-22 | Soshin Electric Co Ltd | Line filter for power converter |
| CN2854917Y (en) * | 2005-12-02 | 2007-01-03 | 天津市康力科技发展公司 | Device for reducing surge and higher harmonic |
| CN101051814A (en) * | 2006-04-04 | 2007-10-10 | 上海雷诺尔电气有限公司 | Variable frequency speed regulator capable of supperssing producing resonant wave |
| CN101013854A (en) * | 2007-02-08 | 2007-08-08 | 北京航空航天大学 | Main circuit of converter with input compatibility of single phase and three phase |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104158390A (en) * | 2013-05-13 | 2014-11-19 | 大连普传科技股份有限公司 | Vector frequency converter |
| CN103516183A (en) * | 2013-09-30 | 2014-01-15 | 无锡洲翔成套焊接设备有限公司 | Spraying power supply three-phase filter |
| CN110676827A (en) * | 2018-07-03 | 2020-01-10 | 丹佛斯电力电子有限公司 | Power electronic device |
| CN110676827B (en) * | 2018-07-03 | 2021-09-28 | 丹佛斯电力电子有限公司 | Power electronic device |
| US11652422B2 (en) | 2018-07-03 | 2023-05-16 | Danfoss Power Electronics A/S | Power electronic device |
| CN109888982A (en) * | 2019-03-18 | 2019-06-14 | 中国重汽集团大同齿轮有限公司 | Slide variable speed electric motors, particularly |
| CN110957947A (en) * | 2019-12-10 | 2020-04-03 | 广东美的制冷设备有限公司 | Drive control circuit of motor, motor and household appliance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101764525B (en) | 2013-11-20 |
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Owner name: SHANDONG TWERD ELECTRICAL CO., LTD. Free format text: FORMER OWNER: HARBIN INSTITUTE OF TECHNOLOGY (WEIHAI) Effective date: 20150114 Free format text: FORMER OWNER: SHANDONG WUFUXING ELECTRICAL CO., LTD. Effective date: 20150114 |
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Effective date of registration: 20150114 Address after: 264209 room 108, 117 venture building, Shenyang Road, Weihai, Shandong Patentee after: SHANDONG TWERD ELECTRIC CO.,LTD. Address before: 264209 No. 2, Wenhua West Road, Weihai, Shandong Patentee before: Harbin Institute of Technology (Weihai) Patentee before: Shandong Wufuxing Electrical Co.,Ltd. |
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Granted publication date: 20131120 Termination date: 20220211 |