Title :
A Design Method for Cage Induction Motors With Non-Skewed Rotor Bars
Author :
Zhao Haisen ; Zhang Jian ; Wang Xiangyu ; Wang Qing ; Liu Xiaofang ; Luo Yingli
Author_Institution :
State Key Lab. of Alternate Electr. Power Syst. with Renewable Energy Sources, North China Electr. Power Univ., Beijing, China
Abstract :
To overcome the influence of the skewed rotor bars on the operating performance of the cage induction motors, this paper presents a design method for non-skewed small and medium cage induction motor based on the time-stepping finite element method, in which the approaches of asymmetrical rotor slots, closed slots, reasonable slot combination, and air-gap length are adopted and studied systematically. With this method, the cage induction motors with non-skewed rotor bars can be realized. Simultaneously, the slot harmonic, which is caused by slot opening, can be eliminated effectively and the starting performance can also be improved. The design example on a 5.5 kW cage induction motor is presented and the experimental validation is also performed.
Keywords :
bars; finite element analysis; induction motors; rotors; air-gap length; asymmetrical rotor slots; cage induction motors; design method; nonskewed medium cage induction motor; nonskewed rotor bars; nonskewed small cage induction motor; power 5.5 kW; skewed rotor bars; slot harmonic; slot opening; time-stepping finite element method; Bars; Finite element analysis; Harmonic analysis; Induction motors; Magnetic circuits; Rotors; Stators; Cage induction motor; losses; non-skewed rotor; time-stepping FEM (T-S FEM);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2013.2280673
