Hybrid excitation of SRM for reduction of vibration and acoustic noise
Jin-Woo Ahn
Sung-Jun Park
Dong-Hee Lee
Dept. of Electr. & Comput. Eng., Kyungsung Univ., Busan, South Korea;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: April 2004
Volume: 51,
Issue: 2
On page(s): 374- 380
ISSN: 0278-0046
INSPEC Accession Number: 7964593
Digital Object Identifier: 10.1109/TIE.2004.825227
Current Version Published: 2004-04-05
Abstract
The inherent simplicity, ruggedness, and low cost of a switched reluctance motor (SRM) makes it a viable candidate for various general-purpose adjustable-speed applications such as industrial and home appliances. The primary disadvantage of an SRM is the vibration and acoustic noise compared with that of conventional machines. The main source of vibration in the SR drive is generated by rapid change of radial magnetic force when phase current is extinguished during commutation action. In this paper, a hybrid excitation method with C-dump inverter is proposed to reduce vibration and acoustic noise in the SR drive. The hybrid excitation has two-phase excitation by long dwell angle as well as conventional one-phase excitation. The vibration and acoustic noise are reduced because the scheme reduces abrupt change of excitation level by distributed and balanced excitation.
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