SU613449A1 - Method of measuring electric machine rotor natural frequency - Google Patents
Method of measuring electric machine rotor natural frequencyInfo
- Publication number
- SU613449A1 SU613449A1 SU762386240A SU2386240A SU613449A1 SU 613449 A1 SU613449 A1 SU 613449A1 SU 762386240 A SU762386240 A SU 762386240A SU 2386240 A SU2386240 A SU 2386240A SU 613449 A1 SU613449 A1 SU 613449A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- natural frequency
- electric machine
- machine rotor
- measuring electric
- rotor
- Prior art date
Links
- 238000000034 method Methods 0.000 title description 6
- 238000005259 measurement Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 230000008846 dynamic interplay Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
Landscapes
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Description
1one
Изобретение относитс к области измерени параметров электрических машин.The invention relates to the field of measuring the parameters of electric machines.
При эксплуатации электрических машин под действием значительных внешних вибраций в широком диапазоне частот возникают резонансные колебани ротора, которые привод т к ухудшению или кратковременному нарушению механической коммутации скольз щего контакта, а зачастую и к полному выходу машины из стро .During the operation of electric machines under the action of significant external vibrations in a wide frequency range, resonant oscillations of the rotor occur, which lead to a deterioration or short-term disruption of the mechanical switching of the sliding contact, and often to the complete failure of the machine to fail.
Предварительно проведенные статистическа и динамическа балансировки ротора не исключают вхождени его в резонанс на частоте внешних возмушений, так как установленный в подшипниках ротор относительно статора представл ет собой колебательную систему.The previously performed statistical and dynamic balancing of the rotor does not exclude its occurrence in resonance at the frequency of external perturbations, since the rotor mounted in the bearings relative to the stator is an oscillatory system.
Измерение резонансных частот таких систем производ т бесконтактными и контактными вибродатчиками различных типов, закрепленных на самой машине в плоскости вынул денных колебаний ротора.Measurement of the resonant frequencies of such systems is performed by contactless and contact vibration sensors of various types, mounted on the machine itself in the plane, took out the rotor's oscillations.
Установка и закрепление контактных и бесконтактных вибродатчиков усложн ет процесс измерени собственной частоты ротора.Installing and securing contact and contactless vibration sensors complicates the measurement of the natural frequency of the rotor.
Наиболее близким к изобретению вл етс способ измерени собственной частоты ротора электрической машины, содержащей .щетки, подключенные к источнику напр жени , путем задани статору электрической машиныClosest to the invention is a method for measuring the natural frequency of a rotor of an electric machine, comprising brushes connected to a voltage source, by setting the stator of an electric machine
внешних вибраций посто нной амплитуды и измен ющейс по заданному закону частоты, измерени амплитуды вибрации ротора и сопоставлени максимального значени этихexternal vibrations of a constant amplitude and a frequency varying according to a given law, measuring the amplitude of the vibration of the rotor and comparing the maximum value of these
вибраций с соответствующей им частотой внешних вибраций 2. В устройстве, реализующем этот способ, применен индукционный вибродатчик, содержащий неподвижную катушку и жестко св занный со щеткой посто нный магнит.vibrations with the corresponding frequency of external vibrations 2. In the device implementing this method, an induction vibration sensor is used, which contains a fixed coil and a permanent magnet rigidly connected with a brush.
Этот способ не дает высокой точности измерений за счет потерь в штыре вибродатчика от частоты вибрации щетки и изменени собственной частоты системы щеточна пружина - щетка из-за добавлени массы магнита . Кроме этого, изготовление самого датчика и установка его на электрической машине услол н ет процесс измеренн . Целью изобретени вл етс упрощениеThis method does not give high accuracy of measurements due to the loss in the pin of the vibration sensor from the frequency of the brush vibration and the change in the natural frequency of the brush-to-brush system due to the addition of the magnet mass. In addition, the manufacture of the sensor itself and its installation on an electrical machine makes the process measured. The aim of the invention is to simplify
процесса измерений и повышение точности в услови х действи значительных внешних вибраций на машину в широком диапазоне частот . Дл этого при неподвижном роторе измер ют амплитуду модул ции тока в цепи щеток и по максимальной величине этих модул ций суд т о собственной частоте ротора.the measurement process and increase the accuracy in terms of significant external vibrations on the machine in a wide frequency range. To do this, with a stationary rotor, the amplitude of the current modulation in the brush circuit is measured and the natural frequency of the rotor is judged from the maximum value of these modulations.
В качестве датчика измерений амплитуды механических колебаний используетс зонаAs a sensor for measuring the amplitude of mechanical vibrations, the zone is used.
динамического взаимодействи щетки с лаdynamic interaction brush with la
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU762386240A SU613449A1 (en) | 1976-07-15 | 1976-07-15 | Method of measuring electric machine rotor natural frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU762386240A SU613449A1 (en) | 1976-07-15 | 1976-07-15 | Method of measuring electric machine rotor natural frequency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU613449A1 true SU613449A1 (en) | 1978-06-30 |
Family
ID=20670584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU762386240A SU613449A1 (en) | 1976-07-15 | 1976-07-15 | Method of measuring electric machine rotor natural frequency |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU613449A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4303882A (en) * | 1979-10-19 | 1981-12-01 | General Electric Company | Method and apparatus for monitoring torsional vibration in the rotor of a dynamoelectric machine |
-
1976
- 1976-07-15 SU SU762386240A patent/SU613449A1/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4303882A (en) * | 1979-10-19 | 1981-12-01 | General Electric Company | Method and apparatus for monitoring torsional vibration in the rotor of a dynamoelectric machine |
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