Abstract:The five-phase induction motor (FIM) using the traditional proportional integral (PI) current controller has the issues of slow dynamic response and large fluctuations of torque and speed during the pole-changing process. To solve these issues, a quasi-proportional resonance controller (QPR) is designed to control the electronic pole-changing of FIM. The designed QPR controller modifies the damping term on the basis of the traditional proportional resonance control, and realizes the static error free tracking of current. The shake problem in the switching process was improved by adding the corresponding harmonic suppression algorithm. At the same time, steady-state performance was achieved before and after the electronic pole-changing. The adaptive change of resonant frequency points with the motor speed was realized by adopting the variable parameter to devise the QPR controller. Discretization method with pre-modified Tustin transform was used to ensure the stability of the QPR control and unerring resonant frequency. The resonant frequency was switched with the change of the motor operating plane, realizing the two-stage precise control before and after the electronic pole-changing. The results of the experiment indicate that the method presented effectively raises the dynamic response performance of torque and speed and reduces their fluctuations during the FIM electronic pole-changing process.