AUTHOR : Tao Sun, Geun-Ho Lee, and Jung-Pyo Hong
ORGANIZATION : 2006 ICEM
JOURNAL :
YEAR : 2006. 09
VOL : CD
ISSUE :
PAGE : 257(1) ~ 257(5)
Abstract— This paper presents a drive strategy to suppress
vibration of permanent magnet Brushless DC (BLDC) motor by
reducing the torque ripple. Considering the practical Back
Electromotive Force (Back-EMF) of BLDC Motor usually has
unideal shape, this strategy divides the phase Back-EMF into four
sections to handle respectively. In each section, the phase current
is regulated by corresponding PWM duty-ratio to compensate the
torque ripple caused by current commutation and unideal
Back-EMF. Specially, owing to unideal Back-EMF, the
conventional torque ripple estimation criterion during current
commutation is valid no more. An improved criterion is proposed
in this paper. A program based on this strategy has been
implemented in MATLAB@Simulink. And the validity of the
presented method is verified by it.
Index Terms— vibration suppression, torque ripple, BLDC,
PWM.