Theory and design of part-winding starting

Author

Rajaraman, K.C.

Author_Institution

Inst. Teknologi Brunei, Begawan, Brunei

Volume

14

Issue

1

fYear

1999

fDate

3/1/1999 12:00:00 AM

Firstpage

31

Lastpage

36

Abstract

When a three-phase cage induction motor is started on a half winding, space harmonic MMFs occur, and the machine usually fails to accelerate beyond the speed of the principal harmonic. A mathematical theory is presented in this paper which not only explains such behavior observed in the past, but also predicts whether, and at what speed, a motor will hang up or crawl on any particular arrangement of half winding. The theory also provides a basis for the design of harmonic-free half windings on which the machine will accelerate smoothly to full speed. This is illustrated by application to a 6-pole motor

Keywords

machine theory; machine windings; squirrel cage motors; starting; application; half winding; harmonic-free half windings design; mathematical theory; part-winding starting; principal harmonic speed; smooth acceleration; space harmonic MMFs; three-phase cage induction motor; Acceleration; Circuits; Induction motors; Machine windings; Machinery; Power & Energy Society; Printing; Stator windings; Synchronous motors; Torque;

fLanguage

English

Journal_Title

Energy Conversion, IEEE Transactions on

Publisher

ieee

ISSN

0885-8969

Type

jour

DOI

10.1109/60.749144

Filename

749144