永磁同步电机转子初始位置角在线检测方法

针对现有永磁同步电机(PMSM)转子初始位置角辨识方法存在的缺点,研究PMSM数学模型,推导电机转子位置与电机绕组电感之间的数学关系。提出利用电机三相绕组静态电感值初步判断转子位置,并用变频器发送激励电压实现转子的极性判断,进而准确辨识出转子的初始位置角。检测过程中无需转子预定位,且电机转子处于机械锁定或自由停止状态下均可实现。试验结果证明所提方法检测精度高,能够满足PMSM矢量控制的需求,具有一定的推广应用价值。

OnLine Detection Method for Initial Rotor Position Angle ofPermanent Magnet Synchronous Motor

Aiming at the shortcomings of the existing motor rotor initial position angle identification method, the mathematical model of permanent magnet synchronous motor (PMSM) was studied, and the mathematical relationship between the rotor position and the inductance of the motor winding was derived. It was proposed to determine the rotor position by using the static inductance value of the threephase winding of the motor, and use the inverter to send the excitation voltage to determine the polarity of the rotor. The rotor prepositioning was not needed during the detection process, and the detection could be realized in mechanical locking or freestop state. The experimental results showed that the method had high detection accuracy and could meet the requirements of vector control of PMSM, which had certain popularization value.