Future energy challenge: a novel low-cost adjustable speed motor with wide speed range

In this paper, a low cost and high efficiency, 500 W permanent magnet brushless DC (PM-BLDC) motor drive that has been designed and implemented for the 2003 International Future Energy Challenge is presented. This drive is mainly designed to operate over a wide range of speed (from 150 rpm to 5000 rpm) and to operate efficiently at different operating points.