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The Rating and Appication of Motors for Refrigeration and Air Conditioning

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1 Author(s)
Paul H. Rutherford ; Chief engineer of the Delco Products Division of General Motors Corporation, Dayton, Ohio.

This paper describes the procedure and practical results to date in applying single-phase motors to refrigeration compressors. The applications are primarily torque applications, temperature considerations being of secondary importance. A line of high-torque motors has been developed to meet the high starting and accelerating torques demanded by the compressors. Utilization of these torques results in running loads considerably higher than rated name-plate loads, without exceeding safe operating temperatures for the insulation life requirement. To meet these requirements a revised method of rating refrigeration motors on a starting and accelerating torque per horsepower and a starting efficiency basis is described. This method more clearly specifies a motor so that a more satisfactory application would be obtainable both from the standpoint of the user and the public utility company or code authority.

Published in:

Transactions of the American Institute of Electrical Engineers  (Volume:58 ,  Issue: 10 )