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A Fuzzy Back-EMF Observer for Sensorless Drive of BLDC Motor  

Park, Byoung-Gun (한양대 대학원 전기공학과)
Kim, Tae-Sung (한양대 대학원 전기공학과)
Ryu, Ji-Su (한영전기공업(주) 기술연구소)
Hyun, Dong-Seok (한양대 전기제어생체공학부)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.12, no.2, 2007 , pp. 157-164 More about this Journal
Abstract
In this paper, a novel sensorless drive for brushless DC (BLDC) motor using the fuzzy back-EMF observer is proposed to improve the performance of conventional sensorless drive methods. Existing sensorless drive methods of the BLDC motor have low performance at transients or low speed range and occasionally require additional circuits. To cope with these problems, the back-EMF of the BLDC motor must be precisely estimated by a fuzzy logic, which is suitable to estimate the back-EMF which has a trapezoidal shape. The proposed algorithm using fuzzy back-EMF observer can achieve robust control for the change of an external condition and continuously estimate position of the rotor at transients as well as at steady state. The superiority of the proposed algorithm is proved through the simulation compared with other sensorless drive methods.
Keywords
BLDC Motor; Sensorless Drive; Fuzzy Control;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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