Operation of an induction motor supplied by voltage with interharmonics

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DOI:

https://doi.org/10.5604/01.3001.0012.1305

Keywords:

induction machine, interharmonics, speed variations, resonance

Abstract

The paper discusses the effects of interharmonics, i.e. frequencies higher than the fundamental frequency, not being its total multiplicity, in the voltage supplying the induction motor. The emergence of interharmonics in a three-phase grid is mainly the result of the swinging of peak mains voltages. In induction machines, this results in the occurrence of currents with interharmonic and subharmonic frequencies, the generation of alternating moments, the swinging of the rotor speed and the change in the RMS value of the current of the fundamental frequency. The paper explores these phenomena simulation, taking into account the skin effect of currents in the rotor cage. The research was carried out both for interharmonics with a positive sequence of phases as well as for the negative sequence.

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Published

2018-06-28

How to Cite

Drabek, T. (2018). Operation of an induction motor supplied by voltage with interharmonics. Science, Technology and Innovation, 2(1), 47–53. https://doi.org/10.5604/01.3001.0012.1305

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Original articles