Title :
Miniature sheet-rotor induction motors for extremely high speeds
Author :
Hesmondhalgh, D.E. ; Tipping, D.
Author_Institution :
University of Manchester, Department of Electronic & Electrical Engineering, Manchester, UK
fDate :
7/1/1983 12:00:00 AM
Abstract :
Electronically fed 2-phase motors capable of operating at speeds up to 150 000 rev/min are considered. Theoretical comparison is given between sheet-rotor and squirrel-cage induction motors having rotors of approximately 1 cm diameter. A design approach is presented for sheet-rotor machines, based on the fundamental rotating field, which relates performance to winding temperatures. Experimental results from a naturally cooled and a force-cooled motor are given. The validity of standard equivalent circuits is discussed and the effect of nonuniform airgap permeance presented.
Keywords :
equivalent circuits; induction motors; machine theory; rotors; small electric machines; squirrel cage motors; design approach; extremely high speeds; force-cooled motor; fundamental rotating field; miniature motors; naturally cooled; nonuniform airgap permeance; sheet-rotor; squirrel-cage induction motors; standard equivalent circuits; winding temperatures;
Journal_Title :
Electric Power Applications, IEE Proceedings B
DOI :
10.1049/ip-b:19830042
