A novel adaptive commutation angle method for single phase BLDC motor

Single-phase BLDC motor is widely applied in cooling fan, pump and blower. Due to high energy price, efficiency is gotten more attention. Commutation angle is one of key factors determining efficiency of BLDC motor. The optimal commutation angle increases with speed increasing. Generally commutation angle is adjusted by software, but the cost of such system is high. In this paper, a novel low-cost adaptive commutation angle method is proposed to improve the performance of single - phase BLDC motor. Analysis and simulation verify its effectiveness. Experimental results show the motor efficiency using adaptive commutation angle is about average 4% higher than that without adaptive commutation angle.