基于电流包络线线性分区开关磁阻电机初始位置估计

提出一种开关磁阻电机脉冲电流包络线线性三角形模型的初始位置角估计方法。该方法先将电机相电感进行分区,通过比较每相脉冲电流峰值判断出转子初始分区,再将每个分区的脉冲电流峰值包络线线性化组成三角形,利用三角形的数学知识得到各分区脉冲电流峰值与初始位置角之间的数学模型,将实测的脉冲电流峰值代入数学模型计算出转子初始位置角。该方法算法简单,容易实现,并通过试验验证了该算法的正确性和可行性。

Initial Position Estimation in Switched Reluctance Motor Drives Based onthe Linear partition of current Envelope

A method of initial position angle estimation for switched reluctance motor is presented based on the pulse current linear triangular model.Firstly,the motor phase inductance is partitioned, the initial partition of the rotor is estimated by comparing the peak value of each phase pulse current. Second, the envelope of the each partition pulse current peak is linearized, and composition triangle, using the mathematical knowledge of triangle, the mathematical model between pulse current peak value and initial position angle is obtained.Thirdly,the measured pulse current peak are substituted into the mathematical model,and the rotor initial position angle is calculated. Last,the experimental results show that the proposed sensorless control methods is sufficiently accurate and works effective.