CN102967827B - Energy-feedback test device of three-phase asynchronous motor - Google Patents
Energy-feedback test device of three-phase asynchronous motor Download PDFInfo
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- CN102967827B CN102967827B CN201110257080.5A CN201110257080A CN102967827B CN 102967827 B CN102967827 B CN 102967827B CN 201110257080 A CN201110257080 A CN 201110257080A CN 102967827 B CN102967827 B CN 102967827B
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Abstract
A kind of energy-feedback test device of three-phase asynchronous motor, including: universal frequency converter, test converter, reactor, tested motor, stand-by motor, A.C. contactor, shaft coupling, it is characterized in that described universal frequency converter outfan connects a reactor, the leading-out terminal of reactor divides two-way, one tunnel is connected with tested motor through test converter, another road is connected with stand-by motor through A.C. contactor, and tested motor is mechanically connected with stand-by motor through shaft coupling。It is an advantage of the invention that circuit structure is simple, it is achieved electric energy feedback, the capacity of universal frequency converter only needs the capacity of tested motor 1/3, controls more simple and direct。
Description
Technical field
The present invention relates to the test equipment of a kind of motor, particularly to a kind of energy-feedback test device of three-phase asynchronous motor, in particular for load and the temperature rise test of threephase asynchronous。
Background technology
The pilot project of threephase asynchronous machine is more, especially complex with load and temperature rise test, double; two " inverter-motor " pilot system of current pilot system many employings energy feedback type, referring to Fig. 1, load (stand-by motor) is served as with the asynchronous machine that model is close, pilot system is by rectification unit, and the tested motor M1 of inverter 1-, inverter 2-stand-by motor M2 forms。Tested motor M1 and stand-by motor M2 shaft coupling connect, it will be noted from fig. 1 that hang with two inversion units 1,2 on dc bus。Tested motor M1 is operated in motoring condition, and stand-by motor M2 is operated in generating state, and the energy feedback that stand-by motor M2 sends provides energy for tested motor M1 to dc bus, greatly reduces the inlet wire power of rectification unit, it is achieved that energy feedback。
This pilot system can well complete the load test of asynchronous machine, and effectively achieve the feedback of energy, but it is made up of system and can be seen that, there are two inversion systems mated with asynchronous machine in system, so along with the increase of tested power of motor, the power requirement of inversion unit is very big, and cost is also inevitable higher。
Summary of the invention
It is an object of the invention to for the defect existed in prior art, it is provided that a kind of energy-feedback test device of three-phase asynchronous motor。The present invention is a kind of simple assay device, and for load and the temperature rise test of threephase asynchronous, assay device structure, under the premise of satisfied test demand, cost has and reduces significantly, is also constantly shrinking simultaneously, saves space。
The present invention includes: universal frequency converter, test converter, reactor, tested motor, stand-by motor, A.C. contactor, shaft coupling, it is characterized in that described universal frequency converter outfan connects a reactor, the leading-out terminal of reactor divides two-way, one tunnel is connected with tested motor through test converter, another road is connected with stand-by motor through A.C. contactor, and tested motor is mechanically connected with stand-by motor through shaft coupling。
The assay device of the present invention is as follows for threephase asynchronous load and temperature rise test step:
A. arranging test converter output frequency be rated value, output voltage is null value；
B. the output voltage and the frequency that arrange universal frequency converter are the value normally starting stand-by motor, start stand-by motor；
C., after stand-by motor stable operation, the output voltage regulating test converter makes it progressively reach the rated voltage of the operation of tested motor, starts tested motor；
D. reduce the output frequency of universal frequency converter, make stand-by motor be in generating state, load to tested motor；
E., under the effect of reactor, the generated energy of stand-by motor feeds back to test converter。
The power bracket of described tested motor is 50～10000kW；The capacity of reactor is 10uH～10mH；The capacity of universal frequency converter is the 1/3～1/2 of tested power of motor。
It is an advantage of the invention that circuit structure is simple, under realizing the premise that motor power is powered, have no effect on the feedback of energy simultaneously。In the circuit of this structure, it is only necessary to the common converter of tested motor 1/3 capacity and a bench teat test converter, and the output of converter can be controlled respectively, control more simple and direct。
Accompanying drawing explanation
The theory diagram of Fig. 1 energy feedback type load test power supply；
The experiment power supply theory diagram of Fig. 2 present invention；
The circuit structure theory diagram of Fig. 3 present invention；
The implementation process FB(flow block) of Fig. 4 present invention。
Detailed description of the invention
Embodiments of the invention are further illustrated below in conjunction with accompanying drawing:
Referring to Fig. 2, the method have the characteristics that universal frequency converter connects a reactor, then separate two branch roads, branch road joint test converter, a tested motor M1, article one, branch road connects stand-by motor M2 by A.C. contactor, and tested motor M1 is connected by shaft coupling with stand-by motor M2。Tested motor M1 is operated in motoring condition, and stand-by motor M2 is operated in generating state。The power supply of tested motor M1 and stand-by motor M2 is adopted in this way,
Referring to Fig. 3, Fig. 4, when carrying out load and temperature rise test, A.C. contactor KM closes, stand-by motor M2 is energized, now being regulated by test converter is the state of 0 at output frequency rated value, output voltage, regulates the output voltage of universal frequency converter and frequency normally starts stand-by motor M2 to rated condition。After stand-by motor M2 normal table to be confirmed runs, owing to tested motor M1, stand-by motor M2 are coaxially connected through shaft coupling, tested motor M1 rotor rotating speed is identical with stand-by motor M2, and the voltage regulating test converter gradually makes tested motor M1 progressively reach rated voltage。When needs load to tested motor M1, as long as suitably reducing the output frequency of universal frequency converter, change stand-by motor M2 power supply state, and the voltage stabilizing function testing converter makes M1 still be operated in rated condition, owing to M1 and M2 connecting shaft runs, M2 rotating speed is constant, it is negative for then making stand-by motor M2 slip s, it is in generator operation state, along with the reduction of universal frequency converter frequency, is also equivalent to the increase of M1 load。M2 is operated in generating state, necessarily has energy to export, and due to the effect of reactor L, according to circuit structure form, electric current can only flow to test converter, it is achieved thereby that the feedback of energy。From embodiment it can be seen that this assay device operation is simple。Simultaneously, owing to universal frequency converter is starting under no load stand-by motor and is the little U/f of amplitude and regulates and load to tested motor, as long as so the 1/3 of the general stand-by motor rated capacity of the capacity of universal frequency converter, cost has very big advantage, there is higher practical value。
Claims (4)
1. an energy-feedback test device of three-phase asynchronous motor, including: universal frequency converter, test converter, reactor, tested motor, stand-by motor, A.C. contactor, shaft coupling, it is characterized in that described universal frequency converter outfan connects a reactor, the leading-out terminal of reactor divides two-way, one tunnel is connected with tested motor through test converter, another road is connected with stand-by motor through A.C. contactor, tested motor is mechanically connected with stand-by motor through shaft coupling, and described assay device is as follows for threephase asynchronous load and temperature rise test step:
A. arranging test converter output frequency be rated value, output voltage is null value；
B. the output voltage and the frequency that arrange universal frequency converter are the value normally starting stand-by motor, start stand-by motor；
C., after stand-by motor stable operation, the output voltage regulating test converter makes it progressively reach the rated voltage of the operation of tested motor, starts tested motor；
D. reduce the output frequency of universal frequency converter, make stand-by motor be in generating state, load to tested motor；
E., under the effect of reactor, the generated energy of stand-by motor feeds back to test converter。
2. energy-feedback test device of three-phase asynchronous motor according to claim 1, it is characterised in that the power bracket of described tested motor is 50～10000kW。
3. energy-feedback test device of three-phase asynchronous motor according to claim 1, it is characterised in that the capacity of described reactor is 10uH～10mH。
4. energy-feedback test device of three-phase asynchronous motor according to claim 1, it is characterised in that the capacity of described universal frequency converter is the 1/3～1/2 of tested power of motor。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110257080.5A CN102967827B (en) | 2011-09-01 | 2011-09-01 | Energy-feedback test device of three-phase asynchronous motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110257080.5A CN102967827B (en) | 2011-09-01 | 2011-09-01 | Energy-feedback test device of three-phase asynchronous motor |
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| CN102967827A CN102967827A (en) | 2013-03-13 |
| CN102967827B true CN102967827B (en) | 2016-06-22 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104267347A (en) * | 2014-09-24 | 2015-01-07 | 无锡新大力电机有限公司 | Motor energy-saving and temperature-rising test device and method |
| CN104656019A (en) * | 2015-03-14 | 2015-05-27 | 浙江大学 | Drag energy recovery test stand of hub motor |
| CN105093108A (en) * | 2015-06-26 | 2015-11-25 | 中交机电工程局有限公司 | Dynamic characteristic on-line monitoring system in motor starting process |
| CN105067925A (en) * | 2015-07-29 | 2015-11-18 | 浙江易控电子科技有限公司 | Energy-recyclable frequency converter testing system, testing method and installation method |
| RU2691778C1 (en) * | 2018-07-17 | 2019-06-18 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Омский государственный университет путей сообщения" | Test bench for asynchronous machines and their loading method |
| CN108845260A (en) * | 2018-08-31 | 2018-11-20 | 重庆顺心仪器设备有限公司 | A kind of motor bracket loading test platform based on frequency conversion control technique |
| RU197440U1 (en) * | 2020-01-31 | 2020-04-27 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Омский государственный университет путей сообщения" | Mutual load test scheme of asynchronous machines |
| CN111458636B (en) * | 2020-04-03 | 2022-04-01 | 中国航发哈尔滨东安发动机有限公司 | High-speed permanent magnet motor loading device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042012A (en) * | 1988-10-21 | 1990-05-09 | 国家机械工业委员会第八设计研究院 | Asynchronous motor experiment supply unit (system) |
| RU2071608C1 (en) * | 1992-07-21 | 1997-01-10 | Акционерное общество открытого типа "Всероссийский научно-исследовательский проектно-конструкторский институт электровозостроения" | Gear to test collectorless a c electric machines |
| CN2349582Y (en) * | 1998-11-13 | 1999-11-17 | 唐山钢铁集团有限责任公司 | Loading tester for three-phase asynchronous motor |
| CN201331570Y (en) * | 2008-12-24 | 2009-10-21 | 华锐风电科技有限公司 | 60 Hz double feed asynchronous generator testing system in 50 Hz electric fence |
| CN101713816B (en) * | 2008-12-31 | 2011-12-07 | 南京理工大学 | Alternating current motor traction test platform with bidirectional direct current energy-feedback link |
| CN201622327U (en) * | 2009-10-26 | 2010-11-03 | 株洲中达特科电子科技有限公司 | Tester of permanent magnet synchronous motor |
| CN202256624U (en) * | 2011-09-01 | 2012-05-30 | 上海电机系统节能工程技术研究中心有限公司 | Energy-feedback test device of three-phase asynchronous motor |
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