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http://dx.doi.org/10.5207/JIEIE.2006.20.1.048

Sensorless Precision Speed Control of PM BLDC Motor  

Won, Chung-Yuen (성균관대 정보통신공학부)
Kim, Yuen-Chung (성균관대 신기술에너지센터)
Yoon, Yong-Ho (성균관대 대학원 메카트로닉스공학과)
Kim, Hack-Seong (동양공업전문대학 자동차시스템과)
Lee, Byuong-Kuk (성균관대 정보통신공학부)
Chun, Jang-Sung ((주)티에스에이)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.20, no.1, 2006 , pp. 48-56 More about this Journal
Abstract
This paper studies particularly applicable method for sensorless PM BLDC motor drive system. The waveform of the motor internal voltages(or back emf) contains a fundamental and higher order frequency harmonics. Therefore the third harmonic component is extracted from the stator phase voltage. The resulting third harmonic signal keeps a constant phase relationship with the rotor flux for any motor speed and load condition. Also because of low resolution of estimated signal obtained by the proposed sensorless algorithm, to improve the wide range of speed response characteristic more exactly, we propose the rotor position signal synthesizer using PLL circuit based on estimated signals. Some experimental results are provided to demonstrate the validity of the proposed control method.
Keywords
PM BLDC Motor; Sensorless Speed Control; Third harmonic; Johnson Counter; PLL;
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  • Reference
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