关键词: 伺服控制, 永磁同步电机, 无电流传感器

Abstract:

In order to reduce the cost of motor control system in servo motor application with position accuracy requirement, a current sensorless control method of permanent magnet synchronous motor （PMSM） was designed. Based on the vector control strategy, the stator current was estimated iteratively by the motor stator voltage equation. The controller parameters were designed according to the system response speed requirements, and the bandwidth of the system was analyzed by Bode diagram. The position loop, speed loop and current loop of PMSM were controlled without current sensor and the validity of the controller parameters was verified by simulation. Position control experiment was carried out on the SPMSM, and the dynamic response met the design requirements, which verified the effectiveness and feasibility of the scheme.

Key words: servo control, permanent magnet synchronous motor, current sensorless