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Using scaled FE solutions for an efficient coupled electromagnetic–thermal induction machine model

Martin Marco Nell (Institute of Electrical Machines (IEM), RWTH Aachen University, Aachen, Germany)
Benedikt Groschup (Institute of Electrical Machines (IEM), RWTH Aachen University, Aachen, Germany)
Kay Hameyer (Institute of Electrical Machines (IEM), RWTH Aachen University, Aachen, Germany)

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering

ISSN: 0332-1649

Article publication date: 4 February 2021

Issue publication date: 7 July 2021

209

Abstract

Purpose

This paper aims to use a scaling approach to scale the solutions of a beforehand-simulated finite element (FE) solution of an induction machine (IM). The scaling procedure is coupled to an analytic three-node-lumped parameter thermal network (LPTN) model enabling the possibility to adjust the machine losses in the simulation to the actual calculated temperature.

Design/methodology/approach

The proposed scaling procedure of IMs allows the possibility to scale the solutions, particularly the losses, of a beforehand-performed FE simulation owing to temperature changes and therefore enables the possibility of a very general multiphysics approach by coupling the FE simulation results of the IM to a thermal model in a very fast and efficient way. The thermal capacities and resistances of the three-node thermal network model are parameterized by analytical formulations and an optimization procedure. For the parameterization of the model, temperature measurements of the IM operated in the 30-min short-time mode are used.

Findings

This approach allows an efficient calculation of the machine temperature under consideration of temperature-dependent losses. Using the proposed scaling procedure, the time to simulate the thermal behavior of an IM in a continuous operation mode is less than 5 s. The scaling procedure of IMs enables a rapid calculation of the thermal behavior using FE simulation data.

Originality/value

The approach uses a scaling procedure for the FE solutions of IMs, which results in the possibility to weakly couple a finite element method model and a LPTN model in a very efficient way.

Keywords

Citation

Nell, M.M., Groschup, B. and Hameyer, K. (2021), "Using scaled FE solutions for an efficient coupled electromagnetic–thermal induction machine model", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 40 No. 2, pp. 267-279. https://doi.org/10.1108/COMPEL-01-2020-0019

Publisher

:

Emerald Publishing Limited

Copyright © 2021, Emerald Publishing Limited

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