An update on AC induction motor efficiency

The need for higher levels of motor efficiency is increasing significantly. Numerous opportunities are available to reach these levels, many of which are being influenced by changes in government regulations, rebate programs, industry standards, and the cost of energy. The purpose of this paper is to update users on the opportunities available to achieve higher performance levels and to summarize those activities that are driving these higher levels. The impact of adjustable frequency drives is included. A summary is provided forecasting the future required levels and the method of demonstrating compliances. The relationship and trade-offs between efficiency and power factor is also addressed.>