Title :
Induction-motor fan drive with unlaminated rotor and heat-pipe cooling
Author :
Chalmers, B.J. ; Her¿¿man, J.
Author_Institution :
University of Manchester Institute of Science & Technology, Department of Electrical Engineering & Electronics, Manchester, UK
fDate :
5/1/1977 12:00:00 AM
Abstract :
The paper describes a variable-voltage induction-motor fan drive, in which the rotor is constructed of hollow unlaminated steel and is cooled using the rotating-heat-pipe principle. A procedure for performance computations is presented, and the special properties of fan drives with unlaminated rotors are demonstrated by both theoretical and tested results for an experimental machine. It is shown that the design successfully overcomes the normal problem of fan-drive cooling in the region of slip equal to ¿. Difficulties associated with losses at low slip are identified, and ways of relieving this problem are examined.
Keywords :
cooling; electric drives; heat pipes; induction motors; losses; rotors; slip (asynchronous machines); heat pipe cooling; losses at low slip; unlaminated rotor; variable voltage induction motor fan drive;
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
DOI :
10.1049/piee.1977.0086
