SU458782A1 - Control method of inter-turn insulation of windings - Google Patents
Control method of inter-turn insulation of windingsInfo
- Publication number
- SU458782A1 SU458782A1 SU1831411A SU1831411A SU458782A1 SU 458782 A1 SU458782 A1 SU 458782A1 SU 1831411 A SU1831411 A SU 1831411A SU 1831411 A SU1831411 A SU 1831411A SU 458782 A1 SU458782 A1 SU 458782A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- phase
- inter
- windings
- control method
- turn insulation
- Prior art date
Links
Landscapes
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Description
1one
Изобретение относитс к области испытани и контрол межвйтковой изол ции обмоток электрических .машин без предварительной разборки.The invention relates to the field of testing and monitoring of intervoltage insulation of electric machine windings without prior disassembly.
Известный способ контрол состоит в том, что во все три фазы включаютс амперметры, при помощи которых пофазно сравнивают величины токов работающей электрической мащины .A known method of control is that ammeters are included in all three phases, with which they compare the currents of a working electrical masch phase by phase.
Целью изобретени вл етс повышение точности контрол о состо нии межвитковой изол ции и надежности работы путем ослаблени вли ни посторонних факторов и пробо повыщенным напр жением предельно ослабленных участков.The aim of the invention is to improve the accuracy of monitoring of the state of inter-turn insulation and the reliability of operation by attenuating the influence of extraneous factors and by puncturing the increased voltage of extremely weakened sections.
Иоставленна цель достигаетс благодар тому, что подключают все три фазы испытываемой электрической машины одновременно к двум источникам, напр жени которых отличаютс по величине но крайней мере на два пор дка (например, 380 в и 2 в), а но частоте - на три .пор дка (например, 50 гц и 40000 гц), причем меньшее напр жение подают непрерывно, а повышенное дискретно.The goal is achieved by connecting all three phases of the tested electric machine simultaneously to two sources, the voltages of which differ in magnitude but at least by two orders of magnitude (for example, 380 V and 2 V), but by frequency - by three. DK (for example, 50 Hz and 40000 Hz), and the lower voltage is supplied continuously, and the increased voltage is discrete.
На чертеже приведена структурна схема, по сн юща предложенный способ контрол межвитковой изол ции. На схеме изображены однофазный генератор повыщенной частоты 1, статический преобразователь числа фаз 2, схем измерени , состо ща из трех включенных в каждую фазу измерителей тока 3, фильтр 4, предназначенный дл заграждени напр жени частоты 50 гц, фильтр 5, предназначенный дл заграждени напр жени частоты 40000 гц, прерыватель 6, вл ющийс преобразователем трехфазного тока в трехфазный дискретный, испытываема электрическа машина 7. Контроль межвитковой изол ции производ т следующи м образом.The drawing shows a structural diagram explaining the proposed method of controlling inter-turn insulation. The diagram shows a single-phase generator of increased frequency 1, a static converter of the number of phases 2, measurement circuits consisting of three current meters 3 included in each phase, a filter 4 designed to bar the voltage of 50 Hz, a filter 5 designed to block the voltage frequency 40,000 Hz, breaker 6, which is a three-phase current converter into a three-phase discrete electric machine under test 7. The inter-turn isolation insulation is tested as follows.
Все три фазы машины подключают одновременно к двум источникам питани , одним из которых вл етс генератор 1 повышенной частоты и пониженного напр жени , предназначенный дл питани измерительной цепи. Нагрузкой цепи вл етс трехфазна обмотка испытываемой электрической машины 7. В качестве другого источника служит трехфазна сеть с частотой 50 гц. Этот источник нснользуют дл создани циклических трехфазных пусковых импульсов. Нагрузкой вл етс та же испытываема обмотка. В каждую фазу измерительной цепи включают показывающий измеритель тока.All three phases of the machine are connected simultaneously to two power sources, one of which is a high frequency and low voltage generator 1 designed to power the measuring circuit. The load on the circuit is the three-phase winding of the tested electric machine 7. A three-phase network with a frequency of 50 Hz serves as another source. This source is used to generate cyclic three-phase starting pulses. The load is the same test winding. A measuring current meter is included in each phase of the measuring circuit.
Преобразователь числа фаз преобразует однофазное напр жение генератора в симметричное трехфазное. Нод действием этого напр жени по фазам обмотки течет ток. Повышенна частота тока позвол ет пренебречьA phase number converter converts a single-phase generator voltage into a symmetrical three-phase one. The action of this voltage in the phase winding current flows. The increased frequency of the current allows to neglect
активной составл ющей сопротивлени . В реactive component of resistance. In re
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1831411A SU458782A1 (en) | 1972-09-25 | 1972-09-25 | Control method of inter-turn insulation of windings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1831411A SU458782A1 (en) | 1972-09-25 | 1972-09-25 | Control method of inter-turn insulation of windings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU458782A1 true SU458782A1 (en) | 1975-01-30 |
Family
ID=20527840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1831411A SU458782A1 (en) | 1972-09-25 | 1972-09-25 | Control method of inter-turn insulation of windings |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU458782A1 (en) |
-
1972
- 1972-09-25 SU SU1831411A patent/SU458782A1/en active
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