Characteristic Analysis and Control of a Hybrid Excitation Linear Eddy Current Brake

Baoquan Kou, Yinxi Jin, Lu Zhang and He Zhang
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Baoquan Kou: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150080, China
Yinxi Jin: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150080, China
Lu Zhang: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150080, China
He Zhang: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150080, China

Energies, 2015, vol. 8, issue 7, 1-24

Abstract: In this paper, a novel hybrid excitation linear eddy current brake is presented as a braking system for high-speed road and rail vehicles. The presence of the permanent magnets (PMs), whose flux lines in the primary core are oppositely directed with respect to the flux lines by the excitation windings, has the effect of mitigating the saturation of the iron in the teeth of the primary core. This allows the brake to be fed with more intense currents, improving the braking force. First, using the magnetic equivalent circuit method and the layer theory approach, the analytical model of the hybrid excitation linear eddy current brake was developed, which can account for the saturation effects occurring in the iron parts. The saturation effects make the design and control of eddy current brakes more difficult. Second, the relationship between the braking force characteristics and the design parameters were analyzed to provide useful information to the designers of eddy current brakes. Then, the controller of the hybrid excitation linear eddy current brake was designed to control the amplitude of the braking force. Finally, experimental measurements were conducted to verify the validity of the theoretical analysis.

Keywords: eddy current brake; hybrid excitation; finite element method; three-level pulse-width modulation (PWM) scheme (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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