The algebraic determination of current components in induction motor driven machinery

摘要

This paper derives expressions for and discusses the three phase current components, in the frequency domain, in an induction motor which drives a mechanical load. The expressions presented illustrate the dependence of the various current components on the dynamics of the rotor (angular acceleration, velocity, and position), on the motor electrical parameters, and on the mechanical load parameters. The mechanical loads inposed on the motor include harmonics of the mechanical load torque. Thus the perturbations of the currents, in the frequency domain, are linked to perturbations of the harmonic components in the imposed load function.