Analytical calculation of the RFOC method in single-phase induction motor

Abstract

This study discusses about different techniques for speed control of single-phase induction motor with two asymmetrical main and auxiliary windings based on Rotor Field-Oriented Control (RFOC) method. In the presented methods, transformation matrices are introduced and applied to the equations of singlephase induction motor. It is shown by applying these rotational transformations to the unbalanced equations of single-phase induction motor, equations of singlephase induction motor are transformed into symmetrical equations. These rotational transformations are achieved based from the steady-state equivalent circuit of single-phase induction motor. Finally, a method for RFOC of singlephase induction motor is proposed. Results show the good performance of the proposed method.