Affiliations: [a] Wuhan National High Magnetic Field Center, Huazhong
University of Science and Technology, Wuhan, Hubei, China | [b] Wuhan Institute of Marine Electric Propulsion, China
Shipbuilding Industry Corporation, Wuhan, Hubei, China | [c] Department of Electrical Machinery and Control,
Huazhong University of Science and Technology, Wuhan, Hubei, China
Correspondence:
[*]
Corresponding author: Liang Li, Wuhan National High Magnetic
Field Center, Huazhong University of Science and Technology, Wuhan, Hubei,
China. Tel.: +86 027 87792331; Fax: +86 027 87792333; E-mail:
liangli44@mail.hustedu.cn
Abstract: An accurate 3-D nonlinear transient finite-element model of an eddy
current brake (ECB) has been developed, with consideration of the skin effect,
eddy current distribution, nonlinear magnetization-saturation and rotation.
Based on the analysis of the eddy current path (ECP) and penetration depth, the
influence of principal parameters related to the braking process is analyzed.
After analysis and comparison with the common round pole, a novel pole with
sector shape has been developed, which brings about a significant increase of
braking torque. An eight-pole ECB device with a peak torque of 4220 N ·
m under an excitation current of 88 A has been designed and tested for use in
high-speed trains. The test results agree well with simulations.
Keywords: 3-D nonlinear transient analysis, eddy current brake, eddy current path, skin effect
