Study on dual rotor permanent magnet induction motor with double squirrel cage
SHANG GUAN Xuan feng, JIANG Si yuan
(School of Electrical Engineering and Automation, Henan Polytechnic University，Jiaozuo 454000,China)


Abstract: Aiming at the low power factor of asynchronous motor, a novel type of motor—the dual rotor permanent magnet induction motor (PMIM) with double squirrel cage was studied. The basic structure and working principle of the motor was introduced, the structure of the double squirrel cage was innovatively designed and the influence of the yoke thickness on the performance of the motor was analyzed. Then the finite element method was used to simulate the motor, the PMIM with single squirrel cage and the common induction motor respectively. The starting ability, efficiency and power factor were studied by comparing the running state of the three kinds of motor under different load. The simulation results indicate that compares with the common induction motor and the PMIM with single squirrel cage, the PMIM with double squirrel cage has higher power factor and efficiency. And it also has better starting performance than that with single squirrel cage.

Key words: permanent magnet induction motor; double squirrel cage; dual rotor; starting performance; steady state performance