Some commentary on the choice of rotor bar material for induction motors

Author

Dymond, J.H. ; Findlay, R.D.

Author_Institution

Gen. Electr. Co., Peterborough, Ont., Canada

Volume

10

Issue

3

fYear

1995

fDate

9/1/1995 12:00:00 AM

Firstpage

425

Lastpage

430

Abstract

Almost any metal can be used in the design of the squirrel cage of an induction machine. Obviously lead is not used because of its low melting point and magnesium because of its low flash point. Others are rejected because of the cost, lack of strength, resistance, thermal conductivity, or manufacturability including ease of joining. Basically, the choice fails to two materials, aluminum and copper and their alloys. For lowest cost of manufacture, especially for mass production, aluminum surpasses copper. In order to determine which of the two materials is the best takes the combined skills of an electrical, a mechanical and a metallurgical engineer. This paper discusses some of the considerations in the choice of rotor bar material

Keywords

aluminium; copper; failure analysis; rotors; squirrel cage motors; Al; Al rotor bar; Cu; Cu rotor bar; aluminum; copper; induction motors; mass production; rotor bar failure; rotor bar material choice; squirrel cage motor; Aluminum alloys; Conducting materials; Copper alloys; Costs; Induction machines; Magnesium; Manufacturing; Mass production; Thermal conductivity; Thermal resistance;

fLanguage

English

Journal_Title

Energy Conversion, IEEE Transactions on

Publisher

ieee

ISSN

0885-8969

Type

jour

DOI

10.1109/60.464864

Filename

464864