Abstract
In order to improve the performance of a permanent magnet type of retarder, which is used as auxiliary braking system of heavy vehicles, the dc steady state flux and eddy current distributions should be analyzed.In this paper, the method of do steady state eddy current analysis using a moving coordinate system, in which the dc steady state flux and eddy current distributions are directly obtained without time iteration, is described. The 2-D and 3-D eddy current analysis of the permanent magnet type of retarder at high speed is carried out. The results, such as the flux distribution and the braking torque, obtained from the analysis and experiment are compared with each other. It is shown that the stable flux and eddy current distributions without spurious oscillations can be obtained by using a moving coordinate system at high Peclet number, and 3-D analysis should be carried out because the result obtained by 2-D analysis is much different from those obtained by 3-D analysis and experiment.
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