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Line-Start Permanent Magnet Synchronous Motor Supplied with Voltage Containing Negative-Sequence Subharmonics

Author

Listed:
  • Piotr Gnaciński

    (Department of Ship Electrical Power Engineering, Gdynia Maritime University, 83 Morska St., 81-225 Gdynia, Poland)

  • Marcin Pepliński

    (Department of Ship Electrical Power Engineering, Gdynia Maritime University, 83 Morska St., 81-225 Gdynia, Poland)

  • Adam Muc

    (Department of Ship Automation, Gdynia Maritime University, 83 Morska St., 81-225 Gdynia, Poland)

  • Damian Hallmann

    (Department of Ship Electrical Power Engineering, Gdynia Maritime University, 83 Morska St., 81-225 Gdynia, Poland)

Abstract

In some power systems, the voltage waveform contains frequency components less than fundamental, called subharmonics or subsynchronous interharmonics. Voltage subharmonics can be both positive- and negative-sequence, independent of their frequency (order). Subharmonics exert harmful effects on sundry electrical equipment, especially on rotating machinery; they cause various noxious phenomena, such as a local saturation of the magnetic circuit, increases in power losses and windings temperature, and torque pulsations leading to vibration of unacceptable severity. Notably, previous works reported excessive vibration of rotating machinery only under no-load, while under full load, rather moderate vibration occurred. This study deals with vibration analysis of a line-start permanent magnet synchronous motor (LSPMSM) supplied with the voltage containing negative-sentence subharmonics. Experimental investigations were conducted for a 3 kW, four-pole production LSPMSM for subharmonics of various values and frequencies. Voltage subharmonics of values significantly less than reported in real power systems were found to cause unacceptable vibration, especially under full load.

Suggested Citation

  • Piotr Gnaciński & Marcin Pepliński & Adam Muc & Damian Hallmann, 2023. "Line-Start Permanent Magnet Synchronous Motor Supplied with Voltage Containing Negative-Sequence Subharmonics," Energies, MDPI, vol. 17(1), pages 1-13, December.
    • Handle: RePEc:gam:jeners:v:17:y:2023:i:1:p:91-:d:1306062
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    References listed on IDEAS

    as
    1. Alberto Gudiño-Ochoa & Jaime Jalomo-Cuevas & Jesús Ezequiel Molinar-Solís & Raquel Ochoa-Ornelas, 2023. "Analysis of Interharmonics Generation in Induction Motors Driven by Variable Frequency Drives and AC Choppers," Energies, MDPI, vol. 16(14), pages 1-26, July.
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