Research on Sensorless FOC Method of PMSM based on ADRC
DOI:
https://doi.org/10.54097/mrx2sh32Keywords:
PMSM, EKF, ADRC, FOC, Voltage Feed-forward Control, Sensorless ControlAbstract
This paper addresses the issues of low observer estimation accuracy, high speed overshoot, narrow speed range, and poor anti-disturbance performance in traditional sensorless Permanent Magnetic Synchronous Motor (PMSM) Field Oriented Control (FOC) systems. It proposes two control methods combining the Extended Kalman Filter (EKF) observer with Linear Active Disturbance Rejection Control (LADRC) and Nonlinear Active Disturbance Rejection Control (NLADRC). The EKF is used to estimate rotor position and speed, while LADRC and NLADRC controllers compensate for load disturbances in the speed loop. EKF outputs are used for feedforward compensation in the current loop, eliminating the coupling between d-axis and q-axis voltages. Simulation results show that both methods offer strong anti-disturbance performance, a wide speed range, strong speed overshoot suppression, and accurate estimation of motor speed and rotor position, thereby enhancing the operational stability of the PMSM system.
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