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Analytical Model of an Eddy Current Retarder with Consideration of Nonlinear Magnetization Characteristics of its Ferromagnetic Material

Authors:
Seongyun Park
Kyihwan Park
Changhee Yoo
Jungkyu Hwang

Keywords: Eddy current retarder, Nonlinear magnetization characteristics, Magnetic saturation, Numerical analysis, Copper layer.

Abstract:
The nonlinearity magnetization characteristics of the rotor material is a problem in the analysis of eddy current retarders (ECR) because the typical operating conditions of ECRs require high supplied currents. In order to address the nonlinearity of the rotor material, a proper method is needed. In this paper, we propose a process to express the effective magnetic flux considering the nonlinear magnetization characteristics of the ferromagnetic materials used in ECRs. Using a numerical iterative scheme to deal with nonlinear magnetization characteristics, we explain why the torque tends to increase less with higher supplied currents. Using the nonlinear analysis model, we discuss the effects of several design parameters on the torque-speed behavior in order to determine the parameters that are most important for torque-speed performance.

Pages: 40 to 47

Copyright: Copyright (c) IARIA, 2014

Publication date: February 23, 2014

Published in: conference

ISSN: 2308-4243

ISBN: 978-1-61208-319-3

Location: Nice, France

Dates: from February 23, 2014 to February 27, 2014