A dynamic pole-phase modulation induction machine model

Abstract

Pole-phase modulation can provide performance benefits in highly dynamic applications through the electronic control of induction machine pole count. An applicable dynamic model is developed, and verified using finite element analysis. The proposed model can describe machines with an arbitrary number of electrical inputs and pole count configurations. The available degrees of freedom in polyphase vector space decomposition are used to develop decoupled energy conversion subspaces for each available pole count, allowing conventional control techniques to be directly applied. Simulation results for a smooth 2-pole/6-pole transition using field-oriented control techniques are provided.