PERFORMANCE PREDICTION OF ENERGY EFFICIENT PERMANENT SPLIT CAPACITOR RUN SINGLE PHASE INDUCTION MOTOR

Abstract

The performance of permanent-split capacitor-run single-phase induction motor can be evaluated from the equivalent circuit parameters, which are derived from dc test, no-load test, locked-rotor test and the winding ratio test. In the present work, the conventional turns ratio has been replaced with computed complex voltage ratio for performance prediction of the ac voltage controller fed capacitor-run motor, at different firing angles of triac. Two different energy efficient experimental schemes, namely traditional phase angle control scheme (with ac voltage controller in series with both main and auxiliary windings) and advanced phase angle control scheme (with ac voltage controller in series with main winding alone), are used for performance observation of the motor. It is observed that for both the schemes, the proposed performance prediction method gives performance variables values closer to the experimental observations in comparison to those obtained using the conventional performance prediction methods. Further, it is also demonstrated that although the conventional parameter estimation and performance prediction methods did not show superiority of the advanced ac voltage control scheme over the traditional one, yet the proposed method does so.