Efficiency comparison between Brushless dc motor and Brushless AC motor considering driving method and machine design

Masataka Miyamasu, Kan Akatsu

研究成果: Conference contribution

19 被引用数 (Scopus)

抄録

This paper describes an approach to establish high efficient drive such a Brushless AC (BLAC) drive by a Brushless DC (BLDC) drive. BLDC drive which is excited rectangular voltage for 120 electrical degrees per cycle is commonly used for the low cost applications of Permanent Magnet Synchronous Motors (PMSMs). This drive method contains low-order harmonics in the current waveform. These harmonics cause a mechanical vibration and the electrical losses. Therefore, BLDC drive is not applicable to the sinusoidal back-EMF machines. However, considering about a high frequency loss by the PWM carrier and also about the switching loss, BLDC drive has a potential to have higher efficiency than the BLAC drive. This paper compares the overall efficiency which includes PWM carrier frequency loss by using the coupling analysis between Finite Element Analysis (FEA) and a circuit simulator. The tested machines are two of Surface type PMSMs (SPMSM). One has a sinusoidal back-EMF waveform (BLAC machine) and the other has a trapezoidal back-EMF waveform (BLDC machine). The both driving methods of BLDC drive and BLAC drive are adapted to each machine, their efficiencies are compared by both simulation and experiments. The results show that the BLDC machine with BLDC drive has higher efficiency than BLAC machine with BLAC drive.

本文言語English
ホスト出版物のタイトルProceedings
ホスト出版物のサブタイトルIECON 2011 - 37th Annual Conference of the IEEE Industrial Electronics Society
ページ1830-1835
ページ数6
DOI
出版ステータスPublished - 2011 12 1
イベント37th Annual Conference of the IEEE Industrial Electronics Society, IECON 2011 - Melbourne, VIC, Australia
継続期間: 2011 11 72011 11 10

出版物シリーズ

名前IECON Proceedings (Industrial Electronics Conference)

Conference

Conference37th Annual Conference of the IEEE Industrial Electronics Society, IECON 2011
国/地域Australia
CityMelbourne, VIC
Period11/11/711/11/10

ASJC Scopus subject areas

  • 制御およびシステム工学
  • 電子工学および電気工学

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