A Simple and Accurate Computation Method of Stator End-Winding and Rotor End-Ring Parameters of Induction Machines

Abstract

This paper proposes a new method to accurately estimate the inductances and resistances of a three-phase squirrel cage induction motor. It is based on low voltage impedance measurement and calculation using a 2D finite element model combined with circuit equations. The short-circuit ring inductance and resistance are determined using an inverse problem technique, which involves the iterative solution of a magneto-harmonic model. The proposed technique is validated by introducing the obtained parameters into the 2D-FE model with nominal operating conditions, confirming its accuracy and reliability.