Reference frame analysis of a slip energy recovery system

Until the late 1970s the performance of a slip energy recovery system of an induction motor was predicted analytically by means of steady-state power balance relationships. Here, reference frame theory is used to establish the equations which can be used to predict adequately the dynamic and steady-state performance of a slip energy recovery system. The steady-state performance as predicted from this analysis is compared with that predicted from computer simulation. The errors of a previously published approach are discussed and the inaccuracy in predicting the steady-state torque-speed characteristics is illustrated. The stage is now set to develop linearized, small displacement equations which can be used for control system design