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Энергоэффективное нагружение асинхронных электродвигателей в процессе послеремонтных испытаний

Энергоэффективное нагружение асинхронных электродвигателей в процессе послеремонтных испытаний

Abstract

In article offered methods on loading of asynchronous electric motors after repair by current and the moment. This technique has advantages. Instead of tests by means of mechanical loading with connection of additional machines on a shaft of the examinee of the electric motor it is offered to use the dynamic modes of the machine, that will allow to refuse mechanical connections. Change of frequency of tension directly influences the moment on a shaft of the machine and electric motor current. Applying these properties it is possible to receive value of an average power on a shaft that is necessary at test of machines after repair. Also this technique assumes recovery of the electric power. For confirmation of the declared technique authors bring results of modeling of this process. The presented materials visually confirm expediency of use of the lowered frequency of 25 Hz, in this mode received the greatest value of power on a shaft of the machine and the power given to a network is. It is offered to apply two schemes depending on requirements to energy efficiency of system.

В статье предложены методы по нагружению асинхронных электродвигателей после ремонта током и моментом. Данная методика имеет преимущества. Вместо испытаний при помощи механической нагрузки с присоединением дополнительных машин на валу испытуемого электродвигателя предлагается использовать динамические режимы машины, что позволит отказаться от механических соединений. Изменение частоты напряжения напрямую влияет на момент на валу машины и ток электродвигателя. Применяя эти свойства, можно получить значение средней мощности на валу, что является необходимым при испытании машин после ремонта. Также данная методика предполагает рекуперацию электро-энергии в сеть. Для подтверждения заявленной методики авторы приводят результаты моделирования данного процесса. Представленные материалы наглядно подтверждают целесообразность использования пониженной частоты 25 Гц, в данном режиме получено наибольшее значение мощности на валу машины и отдаваемой в сеть мощности. Предлагается применять две схемы в зависимости от требований к энергоэффективности системы.

Keywords

АСИНХРОННЫЙ ЭЛЕКТРОДВИГАТЕЛЬ, НАГРУЗКА, МЕХАНИЧЕСКАЯ МОЩНОСТЬ, МОМЕНТ НА ВАЛУ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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