Performance Improvement of the Single-Phase Induction Motor by Using a Statically-Controlled Capacitor

Khater, M. M.

doi:10.21608/erjm.2000.71188

Performance Improvement of the Single-Phase Induction Motor by Using a Statically-Controlled Capacitor

Document Type : Original Article

Author

M. M. Khater

Department of Electrical Engineering, Faculty of Engineering, Menoufiya University, Shebin El-Kom

10.21608/erjm.2000.71188

Abstract

This paper presents an approach for improving both the starting and running
performance of the single-phase induction motor using a statically controlled
capacitor. The control principle is based on a PWM switching for the auxiliary
series capacitor using a pair of fast electronic switches. The proposed scheme
ensures continuously varying capacitance of the auxiliary circuit. A d-q model
for the single-phase induction motor operating under the proposed control has
been developed and numerically analyzed. The optimum operating conditions
for starting and running has been obtained. A laboratory set-up has been built
and experimentally tested to examine the proposed control. Simulation and
experimental results are compared and shown to be in good agreement.
1. INTRODUCTION
Single-phase induction motors are widely used specially in domestic and office
applications. They have the advantages of rugged construction, maintenance-
free and low cost. The main problem of this motor is that it is inherently of no
en annenhage