Ah. Bonnett, UNDERSTANDING THE CHANGING REQUIREMENTS AND OPPORTUNITIES FOR IMPROVEMENT OF OPERATING EFFICIENCY OF AC MOTORS, IEEE transactions on industry applications, 29(3), 1993, pp. 600-610
The need for higher levels of motor efficiency is increasing significa
ntly. Numerous opportunities are available to reach these levels, many
of which are being influenced by changes in government regulations, r
ebate programs, and industry standards. The purpose of this paper is t
o update users on the opportunities available to achieve higher perfor
mance levels and to summarize those activities that are driving these
higher levels. The impact of adjustable-frequency drives will be inclu
ded. A summary forecasting the future required levels and the method o
f demonstrating compliances is provided. The relationship and tradeoff
s between efficiency and power factor will also be addressed.