SU1314288A1 - Method of checking non-uniformity of air gap of induction squirrel-cage rotor motor - Google Patents
Method of checking non-uniformity of air gap of induction squirrel-cage rotor motor Download PDFInfo
- Publication number
- SU1314288A1 SU1314288A1 SU853883353A SU3883353A SU1314288A1 SU 1314288 A1 SU1314288 A1 SU 1314288A1 SU 853883353 A SU853883353 A SU 853883353A SU 3883353 A SU3883353 A SU 3883353A SU 1314288 A1 SU1314288 A1 SU 1314288A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- air gap
- uniformity
- harmonic
- even harmonics
- curve
- Prior art date
Links
Landscapes
- Manufacture Of Motors, Generators (AREA)
Abstract
Изобретение относитс к способам контрол величины неравномерности воздушного зазора в асинхронном электродвигателе с короткозамкну- тым ротором. Цель изобретени - по- вьшение точности измерени . Электродвигатель на холостом ходу разгон ют до номинальной скорости вращени и замер ют электрический сигнал, пропорциональный величине неравномерности воздушного зазора. В качестве электрического сигнала, пропорционального величине неравномерности воздушного зазора, используют среднеквадратичное четных гармоник, которые выдел ют из кривой тока, протекающего через обмотку электродвигател . Способ позвол ет снизить трудозатраты при определении величины неравномерности воздушного зазора. 1 ил. (Л оо 1 IND 00 ооThe invention relates to methods for controlling the amount of uneven air gap in an asynchronous motor with a short-circuited rotor. The purpose of the invention is to improve measurement accuracy. The electric motor idling is accelerated to the nominal speed of rotation and an electrical signal is measured proportional to the magnitude of the air gap non-uniformity. As an electrical signal proportional to the magnitude of the air gap, rms of even harmonics is used, which are separated from the current curve flowing through the motor winding. The method allows to reduce labor costs in determining the size of the air gap non-uniformity. 1 il. (L oo 1 IND 00 oo
Description
Изобретение относитс к электротехнике , а точнее к электромашиностроению , и может быть использовано дл контрол величины неравномерности воздушного зазора (эксцентрите- та) в асинхронных двигател х с корот- козамкнутым ротором при их сборке и испытани х.The invention relates to electrical engineering, and more specifically to electrical engineering, and can be used to control the magnitude of the air gap unevenness (eccentricity) in asynchronous motors with a short-circuited rotor during their assembly and testing.
Цель изобретени - повышение точности измерений.The purpose of the invention is to improve the measurement accuracy.
На чертеже изображена экспериментально сн та тарировочна крива (сплошна лини ) среднеквадратичного значени четных гармоник тока (U) от относительного эксцентриситета (точками показаны замеренные значени эксцентриситета дл партии двигателей ) .The drawing shows the experimentally measured calibration curve (solid line) of the root mean square value of even current harmonics (U) versus relative eccentricity (measured points of the eccentricity for the engine part are shown by dots).
Определение величины неравномерности воздушного зазора по предлагаемому способу производ т следующим образом.The determination of the size of the air gap unevenness according to the proposed method is carried out as follows.
Электродвигатель на холостом ходу разгон ют до номинальной скорости вращени , после чего из кривой тока, протекающего через его обмотки вьще- л ют четные гармоники и вычисл ют среднеквадратичное значение их.The electric motor idling is accelerated to the nominal rotational speed, after which even harmonics are filled with the curve of the current flowing through its windings and the root-mean-square value of them is calculated.
3535
Как показали экспериментальные иссле- 30 наиболее рко выражаетс втора гармоника;As shown by experimental studies, the second harmonic is most clearly expressed;
величина второй гармоники тока АД зависит от значени эксцентриситета воздушного зазора;the magnitude of the second harmonic of the AM current depends on the value of the eccentricity of the air gap;
расхождени расчетных значений неравномерности воздушного зазора, определенных по второй гармонике, и эксперименташьных не превысили 7%.the discrepancies between the calculated non-uniformity of the air gap, determined by the second harmonic, and the experimental values did not exceed 7%.
Предлагаемый способ (по сравнению с известным) снижает трудозатраты цри определении величины неравномерности -воздушного зазора и повьш1ает при этом точность измерени .The proposed method (in comparison with the known method) reduces the labor costs of determining the size of the non-uniformity of the air gap and increases the accuracy of the measurement.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU853883353A SU1314288A1 (en) | 1985-01-03 | 1985-01-03 | Method of checking non-uniformity of air gap of induction squirrel-cage rotor motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU853883353A SU1314288A1 (en) | 1985-01-03 | 1985-01-03 | Method of checking non-uniformity of air gap of induction squirrel-cage rotor motor |
Publications (1)
Publication Number | Publication Date |
---|---|
SU1314288A1 true SU1314288A1 (en) | 1987-05-30 |
Family
ID=21172809
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU853883353A SU1314288A1 (en) | 1985-01-03 | 1985-01-03 | Method of checking non-uniformity of air gap of induction squirrel-cage rotor motor |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU1314288A1 (en) |
-
1985
- 1985-01-03 SU SU853883353A patent/SU1314288A1/en active
Non-Patent Citations (1)
Title |
---|
Авторское свидетельство СССР № 1121633, кл. G 01 R 31/34, 1983. Авторское свидетельство СССР № 1219989, кл. G 01 R 31/34, 1984. * |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Wu et al. | Eliminating load oscillation effects for rotor eccentricity detection in closed-loop drive-connected induction motors | |
SU1314288A1 (en) | Method of checking non-uniformity of air gap of induction squirrel-cage rotor motor | |
RU2695096C1 (en) | Method of controlling air gaps between anchor and poles in electrical machines during assembly | |
SU672708A1 (en) | Method of indirect monitoring of dynamic eccentricity of induction electric machine | |
SU1246029A1 (en) | Method of indirect determining of mechanical characteristic of induction electric motor | |
RU2192701C2 (en) | Method for measuring air gap characteristics in electrical machines | |
SU1682943A1 (en) | A method of controlling non-uniformity of air gap in three-phase asynchronous electric motor | |
SU1753254A1 (en) | Method of determining electric generator rotor eccentricity | |
SU972416A1 (en) | Rotor winding electric resistance measuring method | |
RU2011203C1 (en) | Method of measuring current of generator with brushless excitation | |
SU1663705A1 (en) | Method for determining losses in slip contact of electric machine | |
SU1536329A1 (en) | Method of checking asymmetry of electric machine rotor | |
SU1203444A1 (en) | Method of checking non-uniformity of induction motor air gap | |
SU1177730A1 (en) | Method of determining friction power losses in electric brushes of d.c.commutator machine | |
SU1638682A1 (en) | Device for testing short-circuited rotors of induction machines | |
SU1455883A1 (en) | Method of determining leakage reactance of three-phase synchronic machine | |
SU1684747A1 (en) | Method of quality control of the cast short-circuited winding of a rotor for asynchronous electric motors | |
SU1043574A1 (en) | Asynchronous motor air gap non-uniformity indirect checking method | |
SU1697021A1 (en) | Test method for turn-to-turn insulation of ac machine stator winding | |
SU1302221A1 (en) | Method of determining incremental load losses of d.c.electric machine | |
SU1740986A1 (en) | Method of express-testing in field of eccentricity of air gap of electric motors of fodder preparation machines and agricultural machines | |
KR100331532B1 (en) | Test method for high speed disk type motor and device thereof | |
SU1069084A1 (en) | Method of measuring starting torque pulsations of three-phase thyratron motor | |
SU1674311A1 (en) | Electrical machine | |
SU1467520A1 (en) | Device for measuring electric field intensity |