A V/f= cte Control Drive for Permanent Capacitor Single-Phase Induction Motor

Subject Areas : Electric machine design and control

Pedram  Shahriari Nasab ¹ (MSc /Isfahan University of Technology)
Hossein  SafaMehr ² (MSc /University of Tehran)
Majid  moazzami ³ (Assistant Professor - Department of Electrical Engineering, Najafabad Branch, Islamic Azad University)

Received: 2012-09-06 Accepted : 2013-04-09 Published : 2013-03-01

Keywords: Speed Control, Single-phase induction motor (SPIM), V/f = cte, SPWM,

Abstract :

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.