Research on Low-Speed Performance Optimization of BLDC without Position Sensors Based on EKF

To obtain real-time rotor information of the brushless DC motor, improve the low-speed performance and anti-interference ability of the motor, a sensorless vector control system model of the brushless DC motor was established. A motor control system based on the EKF algorithm was designed. By combining the EKF observer with the brushless DC motor, a simulation model of the EKF motor control system was built based on Simulink. The simulation results show that the motor control system with the EKF observer operates well. The motor’s low-speed operation performance and rotor position detection are very fast, and the motor’s anti-interference ability is significantly enhanced, effectively improving the dynamic performance of the control system [1].