Understanding the changing requirements and opportunities for improvement of operating efficiency of AC motors

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 and industry standards. The opportunities available to achieve higher performance levels, the activities that are driving these higher levels and the impact of adjustable frequency drives are discussed. Future required performance levels and the method of demonstrating compliances are summarized. The relationship and tradeoffs between efficiency and power factor are addressed