Thermal Finite Element Modeling and Simulation of a Squirrel-Cage Induction Machine

TL;DR

This paper develops a thermal finite element model of a squirrel-cage induction machine to analyze electrothermal stresses, validated through laboratory measurements of transient thermal scenarios.

Contribution

It introduces a detailed thermal finite element model that includes conductors and insulation, validated with experimental data for the first time in this context.

Findings

Model accurately predicts thermal behavior under various scenarios

Provides insights into electrothermal stresses affecting insulation

Enhances understanding of thermal management in induction machines

Abstract

Finite element models of electrical machines allow insights in electrothermal stresses which endanger the insulation system of the machine. This paper presents a thermal finite element model of a 3.7 kW squirrel-cage induction machine. The model resolves the conductors and the surrounding insulation materials in the stator slots. A set of transient thermal scenarios is defined and measured in the machine laboratory. These data are used to assess the finite element model.