ADJUSTABLE SPEED DRIVE FOR RESIDENTIAL APPLICATIONS

This paper describes a demonstration of an adjustable speed drive suit able for use in residential applications such as compressors and fans in heat pumps, air conditioners, and refrigerators. The adjustable spe ed drive uses only a four-diode rectifier and a six-transistor six-dio de inverter and does not require a source-frequency filter inductor or capacitor. Motor speed is adjusted with source-frequency phase contro l eliminating the switching loss and electromagnetic interference caus ed by the more commonly used high-frequency pulse-width modulation. Lo w source-current distortion and high power factor are obtained at a fu ll-load operating point which is found using a parametric analysis.