CN202351325U - AC impedance tester of generator rotor - Google Patents
AC impedance tester of generator rotor Download PDFInfo
- Publication number
- CN202351325U CN202351325U CN2011204335383U CN201120433538U CN202351325U CN 202351325 U CN202351325 U CN 202351325U CN 2011204335383 U CN2011204335383 U CN 2011204335383U CN 201120433538 U CN201120433538 U CN 201120433538U CN 202351325 U CN202351325 U CN 202351325U
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- generator amature
- impedance measurement
- measurement appearance
- signal processing
- processing unit
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Abstract
The utility model belongs to the technical field of testing device, and relates to an impedance tester, in particular to an AC impedance tester of a generator rotor. The utility model solves such technical problems as unreasonable design in the prior art, etc. The tester comprises a signal processing circuit, wherein a sampling circuit is connected on the signal processing circuit, the sampling circuit is connected with a central processor, and a display screen, a printer, a control signal input device and a communication module are connected on the central processor. Compared with the prior art, the AC impedance tester of generator rotor has the advantages of reasonable design, reasonable configuration, complete functions, simple wiring, convenience for operation and utilization, high automation degree and good working reliability.
Description
Technical field
The utility model belongs to the proving installation technical field, relates to impedance instrument, especially relates to a kind of generator amature ac impedance measurement appearance.
Background technology
At present measuring the generator amature AC impedance is to judge whether the rotor winding has the effective way of turn-to-turn short circuit, and when turn-to-turn short circuit appears in the generator amature winding, rotor winding effective turn will reduce, and its AC impedance will reduce, and the loss meeting increases to some extent.So the GB regulation is done the test of rotor AC impedance, measures rotor winding AC impedance and power attenuation, compares with all previous test figure.Need more instrument such as reometer, voltage table, power meter, frequency meter owing to measure the generator amature AC impedance, so wiring is very loaded down with trivial details, the wrong line causes any property loss easily.And in the test process, the tester will manually write down the various data that different electric is depressed, and the test duration is long, and labour intensity is big.
For this reason, people have carried out long-term exploration, have proposed various solutions.For example; The Chinese patent document discloses a kind of high-precision AC impedance test device [application number: 201020597688.3]; Comprise: a microprocessor, microprocessor are connected with sine-wave generator, human-computer interaction device, display device, external communication interface, measuring resistance output circuit and measured resistance output circuit; The measuring resistance output circuit comprises standard electric alternating current resistance device, the first program control AC amplifier, first phase-sensitive detector (PSD), first A/D converter that connects successively; The measured resistance output circuit comprises tested AC resistance, the second program control AC amplifier, second phase-sensitive detector (PSD), second A/D converter that connects successively; Microprocessor is respectively through two programmed switch control criterion resistors and measured resistance; Microprocessor is controlled two program control AC amplifiers and two phase-sensitive detector (PSD)s respectively; Calibration resistor and measured resistance are connected in series, and the output terminal of two A/D converters outputs to microprocessor respectively.
Technical matterss such as such scheme has improved the precision of test to a certain extent, but exists complex structure, and manufacturing cost is high, and it is convenient inadequately to manipulate, and function is perfect inadequately.
Summary of the invention
The purpose of the utility model is to the problems referred to above, and a kind of perfect in shape and function is provided, and wiring is simple, and is easy for operation, and automaticity is high, the generator amature ac impedance measurement appearance that functional reliability is good.
For achieving the above object; The utility model has adopted following technical proposal: this generator amature ac impedance measurement appearance; It is characterized in that this tester comprises signal processing circuit, on signal processing circuit, be connected with sample circuit; Described sample circuit links to each other with central processing unit, on central processing unit, is connected with display screen, printer, control signal input media and communication module.
The utility model is integrated voltage, electric current, power, frequency collection and Presentation Function.Wiring is simple, and is easy and simple to handle, do not need hand computation, shortens the test duration, improved the reliability of test.Central processing unit is logical to calculate the angle between voltage, current effective value and voltage, the electric current to crossing the data FFT conversion of gathering, thus the active power of calculating.Calculate the impedance that rotor exchanges through formula again.Central processing unit relatively determines whether to cut off the measurement loop through protective current, threshold voltage with user's setting; Central processing unit is kept at useful data in the nonvolatile memory; Avoid the manual record of tester, thereby realized automatic collection, the purpose that simplifies the operation.
In above-mentioned generator amature ac impedance measurement appearance, described sample circuit is 16 double channel A/D conversion chip.SF 25KHZ can realize weekly the sampling rate of 500 in ripple to the power frequency component of 50HZ.
In above-mentioned generator amature ac impedance measurement appearance, described display screen is a LCDs, and described central processing unit is 32 Cortex-M3 high-performance low-power-consumption microprocessors.
In above-mentioned generator amature ac impedance measurement appearance, described communication module comprises any one or boths' in RS232 interface and the USB interface combination.
In above-mentioned generator amature ac impedance measurement appearance, described signal processing circuit comprises voltage transformer (VT), current transformer operational amplifier and comparer.The voltage signal of sampling converts high-voltage signal into low-voltage signal through accurate voltage mutual inductor, drives shaping through precision operational-amplifier again.The voltage signal of sampling converts big current signal into little current signal through the precision current mutual inductor, converts voltage signal into through operational amplifier again.
Compared with prior art, the advantage of this generator amature ac impedance measurement appearance is: reasonable in design, rationally distributed, and perfect in shape and function, wiring is simple, and is easy for operation, and automaticity is high, and functional reliability is good.
Description of drawings
Fig. 1 is the structural representation that the utility model provides.
Among the figure, signal processing circuit 1, sample circuit 2, central processing unit 3, display screen 4, printer 5, control signal input media 6, communication module 7.
Embodiment
As shown in Figure 1; This generator amature ac impedance measurement appearance comprises signal processing circuit 1; On signal processing circuit 1, be connected with sample circuit 2; Described sample circuit 2 links to each other with central processing unit 3, on central processing unit 3, is connected with display screen 4, printer 5, control signal input media 6 and communication module 7.
Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from the spirit of the utility model or surmount the defined scope of appended claims.
Although this paper has used terms such as signal processing circuit 1, sample circuit 2, central processing unit 3, display screen 4, printer 5, control signal input media 6, communication module 7 morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain the essence of the utility model more easily; It all is contrary with the utility model spirit being construed to any additional restriction to them.
Claims (5)
1. generator amature ac impedance measurement appearance; It is characterized in that; This tester comprises signal processing circuit (1); On signal processing circuit (1), be connected with sample circuit (2), described sample circuit (2) links to each other with central processing unit (3), on central processing unit (3), is connected with display screen (4), printer (5), control signal input media (6) and communication module (7).
2. generator amature ac impedance measurement appearance according to claim 1 is characterized in that, described sample circuit (2) is 16 double channel A/D conversion chip.
3. generator amature ac impedance measurement appearance according to claim 1 and 2 is characterized in that described display screen (4) is a LCDs, and described central processing unit (3) is 32 Cortex-M3 high-performance low-power-consumption microprocessors.
4. generator amature ac impedance measurement appearance according to claim 3 is characterized in that, described communication module (7) comprises any one or boths' in RS232 interface and the USB interface combination.
5. generator amature ac impedance measurement appearance according to claim 3 is characterized in that described signal processing circuit (1) comprises voltage transformer (VT), current transformer operational amplifier and comparer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204335383U CN202351325U (en) | 2011-11-03 | 2011-11-03 | AC impedance tester of generator rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204335383U CN202351325U (en) | 2011-11-03 | 2011-11-03 | AC impedance tester of generator rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202351325U true CN202351325U (en) | 2012-07-25 |
Family
ID=46540321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204335383U Expired - Fee Related CN202351325U (en) | 2011-11-03 | 2011-11-03 | AC impedance tester of generator rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202351325U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249047A (en) * | 2016-07-28 | 2016-12-21 | 全南县超亚科技有限公司 | Pressure-sensitive feeder is tested in a kind of rotor shaping |
| CN109444550A (en) * | 2018-12-27 | 2019-03-08 | 东莞市誉铭新精密技术股份有限公司 | A kind of impedance instrument |
| CN111650439A (en) * | 2020-06-01 | 2020-09-11 | 神华国能集团有限公司 | Rotor winding alternating current impedance detection circuit and device |
-
2011
- 2011-11-03 CN CN2011204335383U patent/CN202351325U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249047A (en) * | 2016-07-28 | 2016-12-21 | 全南县超亚科技有限公司 | Pressure-sensitive feeder is tested in a kind of rotor shaping |
| CN109444550A (en) * | 2018-12-27 | 2019-03-08 | 东莞市誉铭新精密技术股份有限公司 | A kind of impedance instrument |
| CN111650439A (en) * | 2020-06-01 | 2020-09-11 | 神华国能集团有限公司 | Rotor winding alternating current impedance detection circuit and device |
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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: 20120725 Termination date: 20121103 |