SU1287052A1

SU1287052A1 - Method of testing electric machines

Info

Publication number: SU1287052A1
Application number: SU853856085A
Authority: SU
Inventors: Виктор Константинович Волков; Александр Георгиевич Суворов; Валерий Викторович Шумейко
Original assignee: Volkov Viktor K; Suvorov Aleksandr G; Shumejko Valerij V
Priority date: 1985-02-19
Filing date: 1985-02-19
Publication date: 1987-01-30

Abstract

Изобретение относитс к области машиностроени . Цель - повышение производительности труда при испытани х (И) электрических машин (ЭМ). Она достигаетс тем, что при И корь поворачивают на одно полюсное деление , производ т измерение напр жени на противоположных щетках через каждое пазовое деление и считают исправной ЭМ, если отношение максимальной величины измеренного напр жени и минимальной не превышает двух, так как фаза электродвижущей силы (ЭДС), наведенной в одной половине секций, противоположна фазе ЭДС, наведенной в другой половине секций, и при сложении этих ЭДС амплитуда их геометрической силы не может превышать двух. Изобретение позвол ет сократить врем И и может быть использовано дл обнаружени наличи ко- роткозамкнутых витков в корных обмотках . I (Л с:The invention relates to the field of engineering. The goal is to increase labor productivity during testing (I) of electrical machines (EM). It is achieved by the fact that, with measles, they are turned by one pole division, the voltage is measured on opposite brushes through each slot division and considered to be good EM if the ratio of the maximum value of the measured voltage and the minimum does not exceed two, as the electromotive phase ( The EMF induced in one half of the sections is opposite to the phase of the EMF induced in the other half of the sections, and when these EMFs are added together, the amplitude of their geometric force cannot exceed two. The invention makes it possible to shorten the time AND, and can be used to detect the presence of short-circuited turns in the core windings. I (L with:

Description

гоgo

0000

СлSl

юYu

одной половине секций противоположна фазе ЭДС, наведенной в другой половине секций, и при сложении этих ЭДС амплитуда их геометрической суммы не 5 может превьшать двух.one half of the sections is opposite to the phase of the emf induced in the other half of the sections, and when adding these emfs, the amplitude of their geometric sum does not exceed 5.

Таким образом, если отношение максимального измеренного напр жени к минимальному больше двух, то имеют место короткозамкнутые витки.Thus, if the ratio of the maximum measured voltage to the minimum is more than two, then there are short-circuited turns.

Изобретение относитс к испытанию электрических машин и может быть использовано дл обнаружени наличи короткозамкнутых витков в корных обмотках .The invention relates to the testing of electric machines and can be used to detect the presence of short-circuited coils in the core windings.

Цель изобретени - повышение производительности труда за счет сокращени времени испытаний.The purpose of the invention is to increase labor productivity by reducing test time.

Испытание электрической машины по предлагаемому способу осуществл етс cлeдyюш м образом.The test of an electric machine according to the proposed method is carried out in the following way.

При подаче на обмотку возбуждени переменного тока и медленном проворачивании кор на щетках противопо-- ложной пол рности имеетс напр жение, 5 машин, заключающийс в том, что в обtoWhen an alternating current is applied to the winding and the core is turned slowly on the opposite polarity brushes, there is a voltage of 5 machines, consisting in

Claims

The Invention Formulation Test Method

which may vary within certain limits due to technological variations as well as asymmetry of the winding of the core. If there are short-circuited turns in the core winding, the change in this voltage increases, moreover, the maximum value is 5-10 times higher than the minimum when turning by one pole division of the electric machine.

In tests of a known-good electric machine, the ratio of the maximum value of the measured voltage and the minimum cannot exceed two, since the phase of the EMF induced in

one half of the sections is opposite to the phase of the emf induced in the other half of the sections, and when adding these emfs, the amplitude of their geometric sum does not exceed 5.

Thus, if the ratio of the maximum measured voltage to the minimum is more than two, then there are short-circuited turns.

the inference is that

The Invention Formulation Test Method

The electric machine's hitch is supplied with alternating electric current, the measles are turned and the voltage is measured on brushes of opposite polarity, characterized in that, in order to increase labor productivity during testing, the measles are turned on one pole division, the voltage measurements on the opposite brushes are made t through each slot division and consider the electric machine to be tested if the ratio is maximum. The measured voltage to the minimum does not exceed two times.