Study on Switching Strategy of PMSM and BLDCM

The paper presents a switching control strategy for the driving current of permanent magnet synchronous motor (PMSM), which enlarge the starting torque by adopting trapezoidal drive mode at startup, so that the motor can achieve the same characteristic as brushless direct-current motor (BLDCM) and have more application scenarios. Aiming at the torque ripple problem caused by the change of control parameters in the normal operation and switching process, the paper proposes an adaptive fuzzy control method to ensure the reliability and smoothness. At the same time, the system can obtain better dynamic performance and anti-interference ability. The results show that good operating performance can be guaranteed in the entire operating range.