SU570942A1

SU570942A1 - Method of testing brushes of electric machines

Info

Publication number: SU570942A1
Application number: SU7502153483A
Authority: SU
Inventors: Марк Леонидович Дридзо
Original assignee: Предприятие П/Я А-1837
Priority date: 1975-07-09
Filing date: 1975-07-09
Publication date: 1977-08-30

Description

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Фиксируютс величины износа при двух различных значени х энергий (или дл двух серий ;испытаний.The values of wear are recorded at two different energy values (or for two series; tests.

При этом разность значений износа вл етс фактически величиной износа, вызванного разностью энергий искрени , т. е. определенной величиной этой энергии. Поэтому отношение разностей - количество энергии, которое надо приложить в процессе искрени , чтобы получить единицу износа, может быть мерой коммутирующей способности щеток, т. е. способности снижать искрение и противосто ть ему. Аналогично оцениваетс коммутирующа способность коллектора и контактной пары в целом.In this case, the difference in wear values is actually the amount of wear caused by the difference in the sparking energy, i.e., a certain amount of this energy. Therefore, the ratio of differences - the amount of energy that must be applied in the process of arcing to get a unit of wear, can be a measure of the switching capacity of brushes, i.e., the ability to reduce and resist arcing. Similarly, the switching capacity of the collector and the contact pair as a whole is estimated.

Испытани производились при двух значени х энергии искрени , первое при энергии, соответствующей напр жению питани В, второе без тока и, следовательно, при энергии , равной нулю.The tests were carried out at two values of the arcing energy, the first at an energy corresponding to the supply voltage B, the second without a current and, therefore, at an energy equal to zero.

В обоих случа х измер лс линейный износ щеток и имитатора коллектора, рассчитывалась разность величин износа, и по ней - разность скоростей износа. Величина износа контактной нары определ лась как суммл износа щетки и имитатора коллектора.In both cases, the linear wear of the brushes and the collector simulator was measured, the difference in wear values was calculated, and the difference in wear rates was calculated from it. The wear of the contact bunker was defined as the sum of the wear of the brush and the collector simulator.

Частное от делени величины /Дельной мощности искрени на разность скоростей из570942The quotient of dividing the magnitude / effective power of the arcing by the velocity difference from570942

носа и составило показатель коммутирующей способности испытанных щеток, имитатора коллектора и контактной пары л целом (вместо указанного ранее отношени разности энергии к разности величин износа в расчете фигурирует отношение разности мощностей к разности скоростей износа, что идентично).the nose and made an indicator of the switching capacity of the brushes tested, the collector simulator and the contact pair l whole (instead of the previously mentioned ratio of the difference between energy and difference in wear values, the ratio of power difference to difference in wear rates appears in the calculation, which is identical).

Claims

Invention Formula

The method of testing brushes of electric machines by rubbing them on a rotating simulator collector, made of insulated parts of the ring, while

certain values of speed, current density and current pulse measurement at the time of the brush transition from one part of the ring to another, characterized in that, in order to expand the test scope and the simultaneous determination of the switching characteristics of the lamellae and the contact pair as a whole, they are tested at values of the electrical energy released in the process of arcing, and judging

switching characteristics of brushes, lamellas and a co-tact pair by the difference of energy values, referred to the difference of wear values at these values.