A V/F= Cte Control Drive For Permanent Capacitor Single-Phase Induction Motor

Poor performance of the convectional household induction motors which used in home appliances such as refrigerator, cooler, laundry, washing machines, fans, hand-held power tools, and automotive window lift is generally caused by two main reasons. firstly, they have high starting current which causes significant voltage drop, and secondly, they operate in a single speed mode and not in variable speed. in many home appliances, traditionally a discrete speed control method is used by changing the number of the poles. a proper solution for these problems can be achieved by using control drive systems. in this paper, a simple scalar control method is applied to control the speed of a permanent capacitor single phase induction motor (pcspim). the philosophy of this method is on the basis of simultaneous system’s frequency and voltage control on the machines terminals subject to v/f=cte. simulation and practical implementation results clearly show the effectiveness of the simple v/f =cte speed control method for home appliances.