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Performance Analysis of the Eddy Current Braker with Multi-layer Rotor Considering Constant Braking Torque  

Kim, Cherl-Jin (Dept. of Electrical Engineering, Halla University)
Lee, Kwan-Yong (Dept. of Electrical Engineering, Halla University)
Han, Kyoung-Hee (Dept. of Electrical Engineering, Dongguk University)
Beak, Soo-Hyun (Dept. of Electrical Engineering, Dongguk University)
Publication Information
KIEE International Transaction on Electrical Machinery and Energy Conversion Systems / v.4B, no.2, 2004 , pp. 59-64 More about this Journal
Abstract
Study of an accurate and robust braking control method is required as a technical improvement to the servo system. In particular, the braker exhibiting constant braking performance under speed variation conditions of the prime mover needs to be investigated. In this paper, the braking torque of the eddy current braker between the electromagnet stator and rotating disk is analyzed. The torque-speed characteristics and accurate disk construction are represented. From the computer simulation results, it was found that eddy current braking torque is linear or approximately constant over the desired speed range depending on the rotor material, disk construction, pole number and pole displacement of the stator. These relations are confirmed by experimental results.
Keywords
Constant braking torque; eddy current braker; eddy current distribution; finite element method (FEM); multi-layer rotor;
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