Abstract: The paper analyzed the characteristics of sewing machine control system and presented the pulse-width modulation strategy for the bridge-type switch in the main circuit.The brake torque of the motor of the sewing machine was discussed.On analysis of the torque ripple caused by the PWM modes,a novel control scheme,which was composed of the commutation current compensation,was proposed for high-speed flat sewing machine to suppress the commutation torque ripples and improve the precise control of the needle position.The experimental results verified the validity and reliability of the proposed method.