Numerical Simulation of the Demagnetization of a Permanent Magnet Retarder in High Temperature  

作　　者：YE Le-zhi LI De-sheng 

机构地区：[1]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China

出　　处：《International Journal of Plant Engineering and Management》2009年第4期238-242,共5页国际设备工程与管理（英文版）

摘　　要：As a auxiliary brake, Permanent Magnet Retarder （PMR） generates lots of energy and has greater temperature-rise when PMR works, so that it has a direct impact on PMR work performance and even causes demagnetization seriously. In order to analyze permanent magnet （PM） demagnetization in high-temperature in PMR, PMR mathematical model is established firstly, and the boundary conditions of finite element analysis are determined. Then the eddy current field distribution in the rotor is determined by solving eddy current demagnetization field, and PM dynamic permeance coefficient is obtained. Combined with PM demagnetization curve analysis, PMR permanent magnet demagnetization properties are analyzed. The analysis result is validated by the bench test. It shows that part of PM is demagnetized when PRM continues working for about 15 minutes, and the braking performance is declined. Finally, three PMR optimization design methods are proposed.As a auxiliary brake, Permanent Magnet Retarder （PMR） generates lots of energy and has greater temperature-rise when PMR works, so that it has a direct impact on PMR work performance and even causes demagnetization seriously. In order to analyze permanent magnet （PM） demagnetization in high-temperature in PMR, PMR mathematical model is established firstly, and the boundary conditions of finite element analysis are determined. Then the eddy current field distribution in the rotor is determined by solving eddy current demagnetization field, and PM dynamic permeance coefficient is obtained. Combined with PM demagnetization curve analysis, PMR permanent magnet demagnetization properties are analyzed. The analysis result is validated by the bench test. It shows that part of PM is demagnetized when PRM continues working for about 15 minutes, and the braking performance is declined. Finally, three PMR optimization design methods are proposed.

关 键 词：auxiliary brake demagnetization in high temperature finite element analysis permanent magnet retarder 

分 类 号：U284.6[交通运输工程—交通信息工程及控制] U665.18[交通运输工程—道路与铁道工程]