The paper analyzes the relationship between position phase error and freewheel current of silent phase.It is noted that freewheel current error can exactly reflect position phase error.

• 分析位置信号相位与非导通相续流电流的关系，指出非导通相续流电流偏差能够准确地反应无位置传感器无刷直流电机位置信号相位误差。