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

Volume

50

Issue

2

fYear

2014

fDate

Feb. 2014

Firstpage

769

Lastpage

772

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);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2013.2280673

Filename

6749130