AC induction servo sizing for motion control application via loss minimizing real-time flux control

A design procedure is presented for induction machine servo motion control applications. The approach can be used to select the minimum size machine optimally and/or to obtain optimal time performance from a given machine. The reduced-form outcome of the procedure lends itself to real-time implementation in the induction servodrive. The basis of the technique is in modeling and controlling of machine losses. The model is prepared so that trajectory modifications can be made on-site and their effects are properly accounted for in a revised optimal flux trajectory. Theoretical and experimental results demonstrate substantial performance advantages from such an approach. The validity of the design optimization was investigated experimentally on a feed-forward, field-oriented induction servo drive.<>