Efficiency is a key consideration in almost every application due to factors such as rising energy costs and the limited availability of power.  Many applications, including electric fans, office automation equipment, and home appliances, require the highest levels of efficiency with the lowest possible acoustic noise and three-phase Brushless DC (BLDC) motors have become commonplace.  A new auto lead angle control technology, called Intelligent Phase Control (InPAC), allows fully automated control of BLDC motors while achieving the goals of low power consumption, low vibration and low noise.