Reduction of electromagnetic force harmonics in asynchronous traction motor by adapting the rotor slot number

Author

Kim, Byung-taek ; Kwon, Byung-Il ; Park, Seung-Chan

Author_Institution

Dept. of Electr. Eng., Hanyang Univ., Ansan, South Korea

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

3742

Lastpage

3744

Abstract

The harmonics in electromagnetic force are a source of mechanical vibration and audible noise in an asynchronous traction motor. This paper describes an approach to reduce the force harmonics by changing the rotor slot number. Both the radial and tangential forces acting on the stator teeth are calculated by Maxwell stress tensor and their time harmonics are examined by the discrete Fourier decomposition. As a result, the optimal slot number of the rotor to reduce or eliminate the specific force harmonics is determined

Keywords

finite element analysis; harmonics; induction motors; rotors; traction motors; vibrations; Maxwell stress tensor; asynchronous traction motor; audible noise; discrete Fourier decomposition; electromagnetic force harmonics; mechanical vibration; radial forces; rotor slot number; stator teeth; tangential forces; time harmonics; Electromagnetic forces; Equations; Finite element methods; Inverters; Magnetic flux; Rotors; Stators; Traction motors; Vibrations; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800650

Filename

800650