CN202486258U - Portable three-phase motor winding tester - Google Patents
Portable three-phase motor winding tester Download PDFInfo
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- CN202486258U CN202486258U CN2012200822765U CN201220082276U CN202486258U CN 202486258 U CN202486258 U CN 202486258U CN 2012200822765 U CN2012200822765 U CN 2012200822765U CN 201220082276 U CN201220082276 U CN 201220082276U CN 202486258 U CN202486258 U CN 202486258U
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- data acquisition
- acquisition unit
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- winding
- phase motor
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Abstract
A portable three-phase motor winding tester comprises a power supply, a data acquisition unit and a computer. The data acquisition unit is provided with a signal generator, the output end of the data acquisition unit is connected with a motor being tested, and the input end of the data acquisition unit is provided with a voltage sensor and a current sensor. According to the portable three-phase motor winding tester, virtual instrument technology is adopted, the frequency response method and the reactance method are adopted as test methods, and thus the portable three-phase motor winding tester has the advantages of convenience, accuracy and intelligence, and is high in flexibility. Instrument function expansion and upgrading are more easily achieved, and a report is automatically generated by measuring results and easy to print.
Description
Technical field
The utility model relates to a kind of portable three phase electric machine winding tester.
Background technology
Measurement project as three phase electric machine mainly contains: insulation measurement (megohmmeter), in order to detect the state of insulation of motor; The cold conditions direct current resistance is measured (single, double arm electric bridge), to judge the symmetrical balance property of three phase windings; No-load test, locked rotor test, rotating speed, power, efficient and power factor etc. are used to describe the mechanical property major parameter of motor.
And the motor more than 80% burns out and appears under the three phase winding off-center operation situations.
In the balance judgement for three phase electric machine three phase windings, adopt the method for single, double arm bridge measurement cold-state resistance always.This detection method has certain limitation, as some coils connect instead, whether winding connection correct, turn-to-turn minute short circuit, winding deformation etc. can't be confirmed.
The utility model content
Its purpose of the utility model just is to provide a kind of portable three phase electric machine winding tester; Adopt virtual instrument technique, method of testing adopts frequency response method and reactance method, has convenience, accurate, intelligentized characteristics; And dirigibility is high; Instrumental function expansion and upgrading are easier to realize, and the measurement result automatic report generation, are convenient to print.
The technical scheme that realizes above-mentioned purpose and take comprises power supply, data acquisition unit and meter
The calculation machine, said data acquisition unit is provided with signal generator, and said data acquisition unit output connects by measured motor, and said data acquisition unit input end is provided with voltage, current sensor.
Compared with prior art the utlity model has following advantage.
Owing to adopt virtual instrument technique, method of testing adopts frequency response method and reactance method, has convenience, accurate, intelligentized characteristics, and dirigibility is high, and instrumental function expansion and upgrading are easier to realize, and the measurement result automatic report generation, are convenient to printing.
Description of drawings
Below in conjunction with accompanying drawing the utility model is done further to detail.
Fig. 1 is this apparatus structure principle block diagram.
Fig. 2 is this apparatus structure synoptic diagram.
Fig. 3 detects the loop synoptic diagram for this device medium frequency response analysis method.
Fig. 4 is frequency response method wiring schematic diagram in this device.
Fig. 5 is reactance method wiring schematic diagram in this device.
Embodiment
This device comprises power supply, data acquisition unit and computing machine, and is as shown in Figure 1, and said data acquisition unit is provided with signal generator, and said data acquisition unit output connects by measured motor, and said data acquisition unit input end is provided with voltage, current sensor.
This device is a kind of intelligentized three phase electric machine winding testing tool, and the symmetrical balance property etc. that can accomplish three phase electric machine three phase windings is measurement, data archiving, data analysis and provide with reference to conclusion automatically accurately.Its theory diagram and structural representation are like Fig. 1, shown in 2.
Power supply unit mainly provides the data acquisition unit WV of band signal generator; When adopting the test of frequency response method; Signal generator sends 0 ~ 2MHz under the control of computing machine (Labview software must be installed) sinusoidal wave swept-frequency signal is added on the motor winding, and capture card reaches swept-frequency signal and carries out data acquisition through the anti-swept-frequency signal of sending behind the motor winding simultaneously, sends into computing machine; Through software processes, on computer screen, show corresponding waveform and related data.
When adopting the impedance method test, the voltage of motor winding, current signal are sent into capture card through voltage/current sensor, carry out data acquisition, send into computing machine then, on computer screen, show corresponding waveform and related data through software processes.
This tester is mainly used in the balance of three-phase motor stator winding and the measurement of dependent failure.Combine two kinds of measuring methods in the detection, measuring principle is narrated respectively as follows:
1. frequency response method
Under the voltage effect of upper frequency, each winding of three phase electric machine all can be considered a passive linear two-port network that is made up of distribution parameters such as linear resistance, inductance (mutual inductance), electric capacity, and its bulk properties can be described through transfer function H (j ω).If winding deforms or fault (connecing instead like a coil), then parameters such as the inductance of winding inside, electric capacity must change, and cause the zero point and the limit of its equivalent network transfer function H (j ω) to change, and the network frequency response characteristic is changed.Through detecting the frequency response characteristic of each winding of three phase electric machine, and testing result is carried out vertical or horizontal comparison,, just can judge the contingent winding failure of three phase electric machine three phase windings according to the difference of frequency response characteristic.Frequency response characteristic adopts frequency sweeping mode shown in Figure 3 to obtain; L among the figure, K, C represent distributed inductance, distributed capacitance and the ground capacitance of winding unit length respectively; Us is the sine wave exciting signal supply voltage; Rs is signal source output impedance, and R is a build-out resistor, and U1, U2 are respectively equivalent network excitation terminal voltage and responder voltage.
Continuously change the outer frequency f of executing sine-wave excitation source Us, the ratio of the responder voltage U 2 of measurement under different frequency and the signal amplitude of excitation terminal voltage U1 can obtain to specify the amplitude-versus-frequency curve that encourages winding under end and the responder situation.
2. reactance method
Under the power-frequency voltage effect; Each winding of three phase electric machine all can be considered a circuit that is made up of linear resistance R, inductance L; And inductance L is the total inductance of each coil of this phase winding, and the method that connects of it and each coil, shape, size, line footpath etc. are closely related.Therefore, if in winding, there is any one coil that variation has taken place, must cause that L produces corresponding the variation.Apply alternating current 220V or 380V test voltage at winding during measurement, measure electric current, calculate (software completion) and go out corresponding reactance and resistance value.
1) data collecting card
| The input channel number | 2 analog input channels |
| Interface type | USB2.0 |
| The highest sampling rate | 100MS/s |
| Highest resolution | 12 |
| The highest analog input voltage | |
| Input impedance | |
| 1 MΩ / 30 pF | |
| Coupling | AC/DC |
| Precision | 0.2% ± 1 LSB |
| Bandwidth (3dB) | DC is to 10 MHz |
| Storage depth | 128k byte (every passage) |
| The triggering source | CH1, CH2 and or, external digital |
2) signal generator
| The |
1 tunnel simulation output |
| Sampling rate | 50MS/s |
| Resolution | 14 |
| Storage depth | The 256k byte |
| Bandwidth | DC is to 2MHz |
| Output impedance | 50Ω |
| Output voltage | ±12V |
| Output waveform | Sine, triangle, square wave, direct current, user definition |
3) voltage/voltage changer
| |
1 the tunnel |
| Specified input voltage (effective value) | 456V |
| Rated output voltage (effective value) | 7.07V |
| The ratio nonlinearity | ±0.2% |
| The phase differential nonlinearity | ± 5 minutes |
| The range of |
5~120% |
| The output nonlinearity | ≤0.5% |
| The power consumption limit value | 0.5VA |
| Insulation resistance | 100MΩ |
| Dielectric strength | 3000V/50Hz |
| Frequency | 50~60Hz |
4) current/voltage transducer
| |
1 the tunnel |
| Specified input current | 10A |
| Rated output voltage | (7.07V effective value) |
| Loaded impedance | ≥100kΩ |
| The ratio nonlinearity | ±0.1% |
| The phase differential nonlinearity | ± 5 minutes |
| The range of |
5~120% |
| The output nonlinearity | ≤0.1% |
| The power consumption limit value | 1VA |
| Insulation resistance | 100MΩ |
| Dielectric strength | 3000V/50Hz |
| Frequency | 50~60Hz |
4, software platform: this instrument uses is friendly interface, powerful, practical Labview graphical programming software, and it has the software development the integration environment that present application is the widest, with fastest developing speed, function is the strongest.
In the thermometrically field, Labview is initial for thermometrically designs, thereby the application fields of the just present Labview of thermometrically.So far, the testing tool of most of main flows, data acquisition equipment all have special Labview driver, use Labview can control these hardware devices very easily.Simultaneously, the user also can find the various Labview kits that are applicable to the thermometrically field very easily.These kits have almost covered the required all functions of user, and user's redevelopment program on the basis of these kits is just easier.Sometimes only need call the function in several kits simply even, just can form a complete thermometrically application program.
The principle of work and the course of work are summarized as follows:
1, frequency response method
Connect measurement circuit by Fig. 4, click frequency response method icon, get into the frequency response method and test first interface; Click start button, get into motor essential information inputting interface, input motor essential information; Click and confirm; The Frequency Response that begins to carry out tested winding is detected, click " cancellation " button of bottom, interface as the user after, this detection will be cancelled automatically.Will on the hard disk of instrument, generate a catalogue " D: winding detection " after detect finishing automatically; Later Frequency Response detection record will be kept at automatically " D: winding detect the frequency response record " in the catalogue; And can in " D: winding detect " file, generate one automatically and preserve user's motor information " user.ini " file; The motor information that the user once carried out detecting will be kept in this document; Next time, these motors then can be selected in the drop-down list of " basic information region ", and needn't re-enter relevant information again when detecting again.
2, reactance method
Connect measurement circuit by Fig. 5, click the reactance method icon, get into reactance method test first face; Click start button, get into motor essential information inputting interface, input motor essential information; Click and confirm,, click " confirming " button of this bottom, interface the reactance method detection that begins to carry out tested winding; Detect beginning to carry out the right reactance of tested winding, click " cancellation " button of bottom, interface as the user after, this detection will be cancelled automatically.After detecting end; Program will be automatically generates a file " D: winding detect " on the hard disk of instrument; Later reactance method detection record will be kept at automatically " D: winding detect the reactance record " in the catalogue; And can in " D: winding detect " file, generate one automatically and preserve user's motor information " user.ini " file, the motor information that the user once carried out detecting will be kept in this document, and next time is when detecting again; These motors then can be selected in the drop-down list of " basic information region ", and needn't re-enter relevant information again.
Motor essential information and test datas that two kinds of method of testings are preserved automatically can be used as the historical archives of this motor, are beneficial to and carry out longitudinal comparison, for maintenance provides necessary foundation.And can generate the measurement result form automatically, for printing.
Claims (1)
1. portable three phase electric machine winding tester; Comprise power supply, data acquisition unit and computing machine; It is characterized in that; Said data acquisition unit is provided with signal generator, and said data acquisition unit output connects by measured motor, and said data acquisition unit input end is provided with voltage, current sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200822765U CN202486258U (en) | 2012-03-07 | 2012-03-07 | Portable three-phase motor winding tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200822765U CN202486258U (en) | 2012-03-07 | 2012-03-07 | Portable three-phase motor winding tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202486258U true CN202486258U (en) | 2012-10-10 |
Family
ID=46960672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200822765U Expired - Fee Related CN202486258U (en) | 2012-03-07 | 2012-03-07 | Portable three-phase motor winding tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202486258U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257160A (en) * | 2013-04-24 | 2013-08-21 | 华中科技大学 | Method for detecting winding material of three-phase winding device based on thermocouple principle |
| CN104122008A (en) * | 2014-07-23 | 2014-10-29 | 珠海格力电器股份有限公司 | Compressor winding temperature testing method and system |
| CN104808071A (en) * | 2015-04-28 | 2015-07-29 | 北方民族大学 | Three-phase alternating current electric inductance measuring and testing instrument |
| CN107037315A (en) * | 2017-04-16 | 2017-08-11 | 赵洁 | A kind of large-scale workshop inspector uses machine winding detection means |
| CN107390081A (en) * | 2017-08-07 | 2017-11-24 | 华北电力大学 | It is a kind of to be used for the device and method being monitored powered to deformation of transformer winding |
-
2012
- 2012-03-07 CN CN2012200822765U patent/CN202486258U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257160A (en) * | 2013-04-24 | 2013-08-21 | 华中科技大学 | Method for detecting winding material of three-phase winding device based on thermocouple principle |
| CN103257160B (en) * | 2013-04-24 | 2015-06-03 | 华中科技大学 | Method for detecting winding material of three-phase winding device based on thermocouple principle |
| CN104122008A (en) * | 2014-07-23 | 2014-10-29 | 珠海格力电器股份有限公司 | Compressor winding temperature testing method and system |
| CN104808071A (en) * | 2015-04-28 | 2015-07-29 | 北方民族大学 | Three-phase alternating current electric inductance measuring and testing instrument |
| CN107037315A (en) * | 2017-04-16 | 2017-08-11 | 赵洁 | A kind of large-scale workshop inspector uses machine winding detection means |
| CN107037315B (en) * | 2017-04-16 | 2019-09-20 | 赵浩 | A kind of large size workshop inspector machine winding detection device |
| CN107390081A (en) * | 2017-08-07 | 2017-11-24 | 华北电力大学 | It is a kind of to be used for the device and method being monitored powered to deformation of transformer winding |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20130307 |