A generalized computer-aided formulation for the dynamic and steady state analysis of induction machine inverter drive systems

Abstract

This paper presents a generalized formulation for the computer-aided analysis of induction machine drives including feedback controls. A simple circuit model for the induction machine is developed to enhance the conventional drive formulation. This machine model, which can be directly interfaced with any drive circuit configuration, significantly simplifies the commonly used dq formulation. In particular, this model eliminates a general difficulty encountered in the automatic formulation of machine &-terminal constraints imposed by the drive operations.This difficulty considerably limits the development of a general purpose simulation program and its subsequent application for general drive analysis. This paper also proposes an efficient algorithm using a simple nodal approach for automatic formulation of power electronic circuits. This algorithm, combined with the proposed machine circuit model, can easily be used to simulate an arbitrarily configured drive system including the effects of control dynamics. A novel pulse-width-modulated current-source-inverter drive system is employed to demonstrate the efficiency of the proposed formulation. The dynamic and steady state performance of this drive system including an effective harmonic control are simulated. The simulated results ?e experimentally verified.