CN103344915B - synchronous motor temperature rise test system and method - Google Patents
synchronous motor temperature rise test system and method Download PDFInfo
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- CN103344915B CN103344915B CN201310261489.3A CN201310261489A CN103344915B CN 103344915 B CN103344915 B CN 103344915B CN 201310261489 A CN201310261489 A CN 201310261489A CN 103344915 B CN103344915 B CN 103344915B
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Abstract
The invention provides a kind of synchronous motor temperature rise test system, comprise temperature rise display unit, with the rigidly connected asynchronous machine of synchronous motor, the first frequency converter and the second frequency converter; Described first frequency converter comprises current detecting unit, starts control module and step-down control module; Described second frequency converter comprises operation control unit.The present invention also provides a kind of method of correspondence and controls by control module the system that two frequency converters realize temperature rise test.The present invention uses VF to be separated control synchronization motor, can avoid not mating of place capacity and cause vector controlled to load unsuccessfully, cannot carry out temperature rise test, reducing experimentation cost, raising test efficiency simultaneously.
Description
Technical field
The present invention relates to synchronous motor field tests, more particularly, relate to a kind of synchronous motor temperature rise test system and method.
Background technology
When carrying out temperature rise test to motor, usually adopt direct load method temperature rise experiment, it does dragging experiment with a pair rigidly connected unit, and one of them motor is as by measured motor, and another loads to realize load as accompanying measured motor.
As shown in Figure 1, when be synchronous motor 11 by measured motor, accompany measured motor to be asynchronous machine 12 time, when testing the performance in synchronous motor nominal load situation, usual second frequency converter 14 adopts vector controlled pattern to run to control asynchronous machine 12, load to realize load, synchronous motor 11 then adopts vector controlled pattern to make its frequency reach rated frequency by the first frequency converter 13.
Above-mentioned when on-test, first by the first frequency converter 13, tested synchronous motor 11 is dragged to rated speed, then its load is regulated by the second frequency converter 14, i.e. asynchronous machine 12, the electric current of tested synchronous motor 11 is made to reach rated current, now can obtain the specified temperature rise result of tested synchronous motor 11, thus realize direct load temperature rise experiment.
But, by the restriction of place capacity, when the capacity of the first frequency converter 13 and the capacity of synchronous motor 11 differ larger, namely when the capacity of the first frequency converter 13 is much larger than the capacity of tested synchronous motor 11, synchrodyne adopts in vector controlled, it is inadequate due to precision that sampling obtains three-phase current, thus causes the failure of direct load method temperature rise test.
Summary of the invention
The technical problem to be solved in the present invention is, for the problem that above-mentioned temperature rise experiment cannot operate when frequency inverter capacity and synchronous motor capacity differ larger, provides a kind of and is separated the synchronous motor temperature rise test system and method that control based on VF.
The technical scheme that the present invention solves the problems of the technologies described above is, provides a kind of synchronous motor temperature rise test system, comprise temperature rise display unit, with the rigidly connected asynchronous machine of synchronous motor, the first frequency converter and the second frequency converter; Described first frequency converter comprises current detecting unit, starts control module and step-down control module; Described second frequency converter comprises operation control unit; Described current detecting unit, for detecting the first output current of frequency converter; Described startup control module, makes synchronous motor run to rated frequency and rated voltage for being separated control model by VF; Described operation control unit, for making asynchronous machine run to rated frequency by vector controlled pattern; Described step-down control module, for progressively reducing the output voltage of the first frequency converter; Described temperature rise display unit, for when the first output current of frequency converter reaches synchronous motor rated current, the specified temperature rise of display synchronous motor.
The present invention also provides a kind of synchronous motor temperature rise test system, described synchronous motor is by the first transducer drive and be rigidly connected with the asynchronous machine by the second transducer drive, comprise control module and this control module comprise electric motor starting subelement, step-down control subelement, current detecting subelement and temperature rise display subelement, wherein: described current detecting subelement, for detecting the first output current of frequency converter; Described electric motor starting subelement, making synchronous motor run to rated frequency and rated voltage for being separated control model by VF, then making asynchronous machine run to rated frequency by vector controlled pattern; Described step-down controls subelement, for progressively reducing the output voltage of the first frequency converter when described asynchronous machine runs to rated frequency; Described temperature rise display subelement, for when the first output current of frequency converter reaches synchronous motor rated current, the specified temperature rise of display synchronous motor.
In synchronous motor temperature rise test system of the present invention, described control module also comprises shuts down control subelement, stopping exporting, then making the second frequency converter stop output for first making the first frequency converter when shutting down.
In synchronous motor temperature rise test system of the present invention, described control module is the controller of DSP or ARM.
In synchronous motor temperature rise test system of the present invention, described step-down controls subelement progressively reduces the first frequency converter after the back electromotive force of synchronous motor output voltage at the output voltage of reduction by first frequency converter, and makes current detecting subelement start to detect the output current of the first frequency converter.
The present invention also provides a kind of synchronous motor method for testing temperature rise, and described synchronous motor is by the first transducer drive and be rigidly connected with the asynchronous machine by the second transducer drive, comprises the following steps:
(a) first frequency converter by VF be separated control model make synchronous motor run to rated frequency and rated voltage;
(b) second frequency converter make asynchronous machine run to rated frequency by vector controlled pattern;
C () described first frequency converter progressively reduces output voltage, and the temperature rise when output current of this first frequency converter being reached the rated current of synchronous motor is shown as the specified temperature rise of synchronous motor.
In synchronous motor method for testing temperature rise of the present invention, comprise after described step (c): the first frequency converter stops exporting, then the second frequency converter stops exporting.
In synchronous motor method for testing temperature rise of the present invention, described step (c) comprising:
(c1) described first frequency converter reduces the back electromotive force of output voltage to synchronous motor;
(c2) described first frequency converter progressively reduces output voltage and continues the output current of detection first frequency converter;
(c3) when the output current of described first frequency converter reaches the rated current of synchronous motor, detect the temperature rise of the stator winding of synchronous motor, iron core and rotor windings and this temperature rise is shown as the specified temperature rise of synchronous motor.
Synchronous motor temperature rise test system of the present invention and method, VF is used to be separated control synchronization motor, can not mating of place capacity be avoided and cause vector controlled to load unsuccessfully, temperature rise test cannot be carried out, the scrambler simultaneously can removing tested synchronous motor from connects, reduce experimentation cost, improve test efficiency.
Accompanying drawing explanation
Fig. 1 is the principle schematic of existing direct load method temperature rise test.
Fig. 2 is the schematic diagram of synchronous motor temperature rise test system first embodiment of the present invention.
Fig. 3 is the schematic diagram of synchronous motor temperature rise test system second embodiment of the present invention.
Fig. 4 is the schematic flow sheet of synchronous motor method for testing temperature rise embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 2, be the schematic diagram of synchronous motor temperature rise test system first embodiment of the present invention.Synchronous motor temperature rise test system in the present embodiment comprises with tested synchronous motor 21 rigidly connected asynchronous machine 23, the first frequency converter 22 driving synchronous motor 21 to run, the second frequency converter 24 driving asynchronous machine 23 to run and temperature rise display unit 25, wherein state the first frequency converter 22 to comprise current detecting unit 223, start control module 221 and step-down control module 222, second frequency converter 24 and comprise operation control unit 241.Above-mentioned current detecting unit 223, start control module 221 and step-down control module 222 and can be realized in conjunction with peripheral circuit by the software being integrated into the first frequency converter 22, operation control unit 241 is by the software being integrated into the second frequency converter 24 and realize in conjunction with peripheral circuit.
Current detecting unit 223 is for the output current (or input current of tested synchronous motor 21) of lasting detection first frequency converter 22.Starting control module 231 makes synchronous motor 21 run to rated frequency and rated voltage for being separated control model by VF.Operation control unit 241 is for making asynchronous machine 23 run to rated frequency by vector controlled pattern.Step-down control module 222 is for progressively reducing the output voltage (namely outputting to the voltage of synchronous motor 21) of the first frequency converter 22.
Temperature rise display unit 25 is for showing the specified temperature rise of synchronous motor when the first frequency converter 22 output current reaches the rated current of synchronous motor 21.This temperature rise display unit 25 directly records the temperature of synchronous motor stator winding, iron core, rotor windings etc. by temperature sensor etc.
Especially, above-mentioned step-down control module 222 is after asynchronous machine 23 runs to rated power, the voltage outputting to synchronous motor 21 is reduced to the back electromotive force (now inputting the electric current of synchronous motor 21 close to 0A) of synchronous motor 21, now starting current detecting unit 223 makes its electric current detecting input synchronous motor 21 and progressively reduces the voltage outputting to the first frequency converter 22, until current detecting unit 223 detects that the electric current of input synchronous motor 21 reaches the rated current of synchronous motor 21.
Above-mentioned synchronous motor temperature rise test system by operating personnel by carrying out manual operation to the first frequency converter 22 and the second frequency converter 24, thus can complete synchronous motor temperature rise test.
As shown in Figure 3, be the schematic diagram of synchronous motor temperature rise test system second embodiment of the present invention.Synchronous motor temperature rise test system in the present embodiment comprises with tested synchronous motor 31 rigidly connected asynchronous machine 33, the first frequency converter 32 driving synchronous motor 31 to run, the second frequency converter 34 driving asynchronous machine 33 to run and the control module 35 for controlling temperature rise test process.
Above-mentioned control module 35 comprises electric motor starting subelement 351, step-down controls subelement 352, current detecting subelement 353 and temperature rise and shows subelement 354.Especially, this control module 35 can adopt the controller of DSP or ARM, and electric motor starting subelement 351, step-down control subelement 352, current detecting subelement 353 and temperature rise display subelement 354 and then can be realized in conjunction with peripheral circuit by the software of the controller being integrated into DSP or ARM.
Current detecting subelement 353 is for detecting the first frequency converter 32 output current (or input current of synchronous motor 31).Electric motor starting subelement 351 runs to rated frequency and rated voltage for making the first frequency converter 32 adopt VF to be separated control model control synchronization motor 31, then makes the second frequency converter 34 adopt vector controlled Schema control asynchronous machine 33 to run to rated frequency.Step-down controls subelement 352 for progressively reducing the output voltage of the first frequency converter 32 when asynchronous machine 33 runs to rated frequency.Temperature rise display unit 354 is for detecting that at current detecting subelement 353 first frequency converter 32 output current shows synchronous motor specified temperature rise when reaching the rated current of synchronous motor 31.
In addition, above-mentioned control module 35 also can comprise shutdown control subelement.When this shutdown controls subelement for shutting down after temperature rise has detected, first making the first frequency converter 32 stop exporting, then making the second frequency converter 34 stop exporting.
Especially, above-mentioned step-down controls subelement 352 when step-down, first the back electromotive force (now inputting the electric current of synchronous motor 21 close to 0A) of output voltage to synchronous motor 31 is reduced, then progressively reduce the output voltage of the first frequency converter 32 and make current detecting subelement 353 continue the output current of detection first frequency converter 32, until current detecting unit 223 detects that the electric current of input synchronous motor 21 reaches the rated current of synchronous motor 21.
Synchronous motor temperature rise test system adopts VF separation to control to control the operation of tested synchronous motor, place capacity can be avoided not mate and cannot carry out temperature rise test, improve test efficiency.Eliminate the scrambler of synchronous motor simultaneously, provide cost savings.
As shown in Figure 4, be the schematic flow sheet of synchronous motor method for testing temperature rise embodiment of the present invention, wherein synchronous motor is rigidly connected with the asynchronous machine by the second transducer drive by the first transducer drive, and the method comprises the following steps:
Step S41: the first frequency converter is separated control model by VF (constant voltage and frequency ratio) makes synchronous motor run to rated frequency and rated voltage.
Step S42: the second frequency converter makes asynchronous machine run to rated frequency by vector controlled pattern.
Step S43: the first frequency converter progressively reduces output voltage, and the temperature rise when output current of this first frequency converter being reached the rated current of synchronous motor is shown as the specified temperature rise of synchronous motor.
In this step, can specifically comprise: the first frequency converter reduces the back electromotive force of output voltage to synchronous motor; First frequency converter progressively reduces output voltage and continues the output current of detection first frequency converter; When the output current of the first frequency converter reaches the rated current of synchronous motor, detect the temperature rise of the stator winding of synchronous motor, iron core and rotor windings and this temperature rise is shown as the specified temperature rise of synchronous motor.
When shutdown has been tested in temperature rise, first make the first frequency converter stop exporting, then made the second frequency converter stop exporting.
Above-mentioned synchronous motor method for testing temperature rise realizes by Non-follow control two frequency converters, and the output also controlling two frequency converters by the controller of DSP or ARM realizes.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (8)
1. a synchronous motor temperature rise test system, is characterized in that: comprise temperature rise display unit, with the rigidly connected asynchronous machine of synchronous motor, the first frequency converter and the second frequency converter; Described first frequency converter comprises current detecting unit, starts control module and step-down control module; Described second frequency converter comprises operation control unit; Described current detecting unit, for detecting the first output current of frequency converter; Described startup control module, makes synchronous motor run to rated frequency and rated voltage for being separated control model by VF; Described operation control unit, for making asynchronous machine run to rated frequency by vector controlled pattern; Described step-down control module, for progressively reducing the output voltage of the first frequency converter; Described temperature rise display unit, for when the first output current of frequency converter reaches synchronous motor rated current, the specified temperature rise of display synchronous motor.
2. a synchronous motor temperature rise test system, described synchronous motor is by the first transducer drive and be rigidly connected with the asynchronous machine by the second transducer drive, it is characterized in that: comprise control module and this control module comprise electric motor starting subelement, step-down control subelement, current detecting subelement and temperature rise display subelement, wherein: described current detecting subelement, for detecting the first output current of frequency converter; Described electric motor starting subelement, making synchronous motor run to rated frequency and rated voltage for being separated control model by VF, then making asynchronous machine run to rated frequency by vector controlled pattern; Described step-down controls subelement, for progressively reducing the output voltage of the first frequency converter when described asynchronous machine runs to rated frequency; Described temperature rise display subelement, for when the first output current of frequency converter reaches synchronous motor rated current, the specified temperature rise of display synchronous motor.
3. synchronous motor temperature rise test system according to claim 2, is characterized in that: described control module also comprises shuts down control subelement, stopping exporting, then making the second frequency converter stop output for first making the first frequency converter when shutting down.
4. the synchronous motor temperature rise test system according to Claims 2 or 3, is characterized in that: described control module is the controller of DSP or ARM.
5. synchronous motor temperature rise test system according to claim 2, it is characterized in that: described step-down controls subelement progressively reduces the first frequency converter after the back electromotive force of synchronous motor output voltage at the output voltage of reduction by first frequency converter, and makes current detecting subelement start to detect the output current of the first frequency converter.
6. a synchronous motor method for testing temperature rise, described synchronous motor is by the first transducer drive and be rigidly connected with the asynchronous machine by the second transducer drive, it is characterized in that: comprise the following steps:
(a) first frequency converter by VF be separated control model make synchronous motor run to rated frequency and rated voltage;
(b) second frequency converter make asynchronous machine run to rated frequency by vector controlled pattern;
C () described first frequency converter progressively reduces output voltage, and the temperature rise when output current of this first frequency converter being reached the rated current of synchronous motor is shown as the specified temperature rise of synchronous motor.
7. synchronous motor method for testing temperature rise according to claim 6, is characterized in that: comprise after described step (c): the first frequency converter stops exporting, and then the second frequency converter stops exporting.
8. synchronous motor method for testing temperature rise according to claim 6, is characterized in that: described step (c) comprising:
(c1) described first frequency converter reduces the back electromotive force of output voltage to synchronous motor;
(c2) described first frequency converter progressively reduces output voltage and continues the output current of detection first frequency converter;
(c3) when the output current of described first frequency converter reaches the rated current of synchronous motor, detect the temperature rise of the stator winding of synchronous motor, iron core and rotor windings and this temperature rise is shown as the specified temperature rise of synchronous motor.
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| CN103344915B true CN103344915B (en) | 2016-03-16 |
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| CN104198086B (en) * | 2014-08-22 | 2017-01-25 | 美的集团股份有限公司 | Winding temperature rise test method and device |
| CN104215906B (en) * | 2014-09-22 | 2017-02-08 | 国家电网公司 | Method for testing motor efficiency based on automatic control |
| 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 |
| TWI551874B (en) * | 2015-03-13 | 2016-10-01 | 財團法人工業技術研究院 | Motor efficiency analysis method for motor inverter |
| CN105548879A (en) * | 2015-12-01 | 2016-05-04 | 珠海格力电器股份有限公司 | Automatic test method and circuit for motor temperature rise and motor |
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| CN2135774Y (en) * | 1992-03-12 | 1993-06-09 | 四川省机械研究设计院 | Contactless tester for motor rotator temp. and trouble |
| CN101769797A (en) * | 2009-01-06 | 2010-07-07 | 李虎 | Temperature rise analytical method for predicting temperature of permanent magnet in permanent magnet synchronous motor |
| 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 |
| CN102288913A (en) * | 2011-08-12 | 2011-12-21 | 大连华锐股份有限公司 | Testing system for double-fed motor and testing method thereof |
| CN102841314A (en) * | 2012-09-21 | 2012-12-26 | 南车株洲电力机车研究所有限公司 | Temperature rise test method and system for electrically excited synchronous motors |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3627426B2 (en) * | 1997-02-18 | 2005-03-09 | 株式会社明電舎 | Control device for rotating electrical machine |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2135774Y (en) * | 1992-03-12 | 1993-06-09 | 四川省机械研究设计院 | Contactless tester for motor rotator temp. and trouble |
| CN101769797A (en) * | 2009-01-06 | 2010-07-07 | 李虎 | Temperature rise analytical method for predicting temperature of permanent magnet in permanent magnet synchronous motor |
| 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 |
| CN102288913A (en) * | 2011-08-12 | 2011-12-21 | 大连华锐股份有限公司 | Testing system for double-fed motor and testing method thereof |
| CN102841314A (en) * | 2012-09-21 | 2012-12-26 | 南车株洲电力机车研究所有限公司 | Temperature rise test method and system for electrically excited synchronous motors |
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