Influence of rotor slots parameters on permanent magnet motor with slotted solid rotor
                                                  SHANG GUAN Xuan feng, LI Zheng xiu, JIANG Si yuan
                      (School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454000, China)

Abstract: Aiming at the low efficiency and power factor of the low power induction motor, a new motor line start permanent magnet synchronous motor with slotted solid rotor was studied. which was transformed by existing three phase induction motor, The motor developed by utilizing the stator of the Y90L 4, 1.5 kW induction motor and redesigning the rotor was presented after the analysis for the induction motor. With a solid structure, the rotor was grooved along the outer circumference of its core, which contained built in permanent magnet poles. Through the finite element calculation, the influence of rotor grooves parameters on the line start ability and steady state performance of the motor were analyzed, then the regularity was summarized. Finally, the starting and steady state performance were compared between the induction motor and based on the improved LSPMSM with slotted solid rotor. The results indicate that the LSPMSM with slotted solid rotor has bigger starting torque ratio and higher power factor under different load torque than that of the induction motor.

Key words: slotted solid rotor; permanent magnet synchronous motor (LSPMSM); line start; steady state performance