Characteristic Analysis and Control of a Rotary Electromagnetic Eddy Current Brake

Authors

  • Qiao Ren Institute of Railway Transit Tongji University, Shanghai, 201800, China
  • Jimin Zhang Institute of Railway Transit Tongji University, Shanghai, 201800, China
  • Hechao Zhou Institute of Railway Transit Tongji University, Shanghai, 201800, China
  • Jinnan Luo Institute of Railway Transit Tongji University, Shanghai, 201800, China

Keywords:

Braking characteristics, braking torque control, eddy current brake, finite element analysis

Abstract

This article designs an electromagnetic rotating eddy current brake (ECB), which has the advantages of no wear and low noise compared with traditional friction brake. First, using the magnetic circuit analysis model, a theoretical calculation formula of the ECB’s braking characteristics is given. The results show that the braking torque is negatively correlated with the thickness of the air gap as well as the electrical conductivity and the relative magnetic permeability of the brake disc material, and positively correlated with the number of ampere turns and the number of electromagnet poles. Secondly, a three-dimensional finite element (FE) model of the brake is established. The results of braking torque-speed characteristics between finite element calculation and theoretical analysis are compared, and the reasons for the differences between the two are explained. Using the FE model, the influence of the design parameters on torque characteristics is studied. Combined with the theoretical analysis model, the results are explained accordingly, providing a reference for the optimal design of the brake. Finally, a controller for the electromagnetic rotating eddy current brake is designed to control the amplitude of the desired braking torque.

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Author Biographies

Qiao Ren, Institute of Railway Transit Tongji University, Shanghai, 201800, China

Qiao Ren graduated from Changan University in 2018 with a bachelor's degree. She is currently working toward the Ph.D. degree with the Institute of Railway Transit, Tongji University, China. Her current research interests include eddy current brake, high-speed magnetic levitation control.

Jimin Zhang, Institute of Railway Transit Tongji University, Shanghai, 201800, China

Jimin Zhang received his M.Sc. and Ph.D. degrees from Southwest Jiaotong University, Chegdu, China, in 1999, and 2004, respectively. Since 2004, he has been with Tongji University, where he is currently a Professor. His research interests include magnetic levitation control, electromechanical coupling and active vehicle safety control, etc.

Hechao Zhou, Institute of Railway Transit Tongji University, Shanghai, 201800, China

Hechao Zhou received his M.Sc. and Ph.D. degrees from Tongji University and Technische Universität Berlin, in 2010, and 2014, respectively. Since 2014, he has been with Tongji University, where he is currently an Assistant Professor. His research interests include highspeed magnetic levitation and vehicle system dynamics, etc.

Jinnan Luo, Institute of Railway Transit Tongji University, Shanghai, 201800, China

Jinnan Luo received his B.S. degree in 2018 and M.Sc. degree in 2021 from Tongji University, Shanghai, China. His interest is high-speed magnetic field analysis and eddy current brake.

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Published

2021-10-21

How to Cite

[1]
Q. . Ren, J. . Zhang, H. . Zhou, and J. . Luo, “Characteristic Analysis and Control of a Rotary Electromagnetic Eddy Current Brake”, ACES Journal, vol. 36, no. 08, pp. 1065–1074, Oct. 2021.

Issue

2021: Vol 36 Iss 8

Section

General Submission