Effect of voltage subharmonics and interharmonics on currents of line start permanent magnet synchronous motor
Autor
Gnaciński, Piotr
Pepliński, Marcin
Opublikowane w
Technical Transactions
Numeracja
Vol. 121, iss. 1
Data wydania
2024
Miejsce wydania
Warsaw
Wydawca
Sciendo
Sekcja czasopisma
Mechanics
Język
angielski
eISSN
2353-737X
DOI
https://doi.org/10.37705/TechTrans/e2024023
Słowa kluczowe
interharmonics, line start permanent magnet synchronous motor, power quality, thermal loading, subharmonics
Abstrakt
This study deals with currents of a line start permanent magnet synchronous motor (LSPMSM), supplied with voltage containing subharmonics and interharmonics – components of the frequency less than the fundamental frequency or not being equal to its integer multiple, respectively. The results of experimental investigation are presented for a factory-made four-pole LSPMSM of the rated power 3 kW. Voltage interharmonics result in the flow of current components of various frequencies and comparatively small values. Their presence could lead to resonance phenomena, but is not expected to cause the motor overheating. Contrastingly, voltages subharmonics cause the flow of significant current subharmonics, which may considerably increase power losses, and consequently – the thermal loads of the LSPMS.