Abstract：Regarding the problem that the sensorless brushless DC motor is inaccurate in commutation operation, this paper analyzes the mathematical relationship between the commutation error angle and the integral value of the line voltage difference. The influence of the freewheeling process on the integral value of the line voltage difference is considered. Based on the line voltage difference integral, a sensorless commutation error correction method for brushless DC motor is proposed. Compared with the traditional commutation compensation method, this method does not need to reconstruct the virtual neutral point of the motor, the integral boundary is easy to determine, and the compensation algorithm is simple. The experimental results show the correctness of the theory and the effectiveness of the proposed compensation method.
姚绪梁, 林浩, 鲁光旭, 王景芳, 赵继成. 一种基于线电压差积分的无位置传感器无刷直流电机换相误差检测和校正方法[J]. 电工技术学报, 2019, 34(22): 4651-4660.
Yao Xuliang, Lin Hao, Lu Guangxu, Wang Jingfang, Zhao Jicheng. Line Voltage Difference Integral Method of Commutation Error Adjustment for Sensorless Brushless DC Motor. Transactions of China Electrotechnical Society, 2019, 34(22): 4651-4660.
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2019, Vol. 34 
