Abstract: Aiming at the distinctions of commutation torque ripple in a three-phase, six-state brushless DC motor (BLDCM) with two conduction states under different speeds and different commutation intervals, a novel method is proposed to obtain information at high-speed or low-speed regions. The ending of commutation according to the feedback of torque ripple deviation allows different pulse width modulations (PWM) to be used to reduce torque ripple in both high-speed and low-speed regions. The novel method is not only adapted to the difference in torque ripple of different speeds, but it also solves the difficult problem of getting an accurate commutation interval. A low-voltage BLDCM experimental platform has been set up to validate the control method； Experimental results show that commutation torque ripple is suppressed in wide speed regions.