摘要：该文研究了一种基于逆变器PWM载波频率成份法的永磁同步电机无位置传感器控制策略。阐述了该控制方法的实现原理，重点分析了直流母线电压对转子位置估算的影响，理论分析得出随着直流母线电压的下降位置估算误差增大，并进行了相关的实验研究，证明了该理论分析的正确性。
关键词：永磁同步电机;无位置传感器;载波频率成份法;直流母线电压

Abstract:A sensorless control method based on PWM carrier frequency component was researched in this paper.Its theory was expounded here.Simultaneously,effect of DC bus voltage to rotor-position estimation accuracy was analyzed.The analysis indicated that position error increased as DC bus voltage decreased.The experiment results verify the correctness of the theory analysis.
Key Words:Permanent magnet synchronous Motor；Sensorless control；Carrier frequency component Method；DC bus voltage