关键词: 铁氧体伺服电机, 初始位置估计, 双坐标参考系, 转矩指令

Abstract:

Aiming at the static torque characteristic of ferrite servo motor, a method based on double coordinate reference system was proposed to estimate the rotor position of ferrite servo motor. The method was to apply two different reference torque commands in the reference coordinate system of the motor control system. The maximum distance of the rotor was calculated by the position sensor, and the initial magnetic pole position of the motor was estimated by the anti-trigonometric function and the secant method. This method effectively avoids the influence of motor parameter variation on position estimation and is easy to implement. The results of prototype simulation and field experiment show that the rotor position estimation algorithm based on double coordinate reference ferrite servo motor can converge to the estimated value quickly, and the estimation error is small and simple.

Key words: ferrite servo motor, initial position estimation, double coordinate reference system, torque command