Calculation Method of Eddy Current Conversion Coefficients of Eddy Current Retarder

doi:10.3969/j.issn.1674-0696.2015.01.31

Abstract

Abstract: The impact of eddy current conversion coefficient on theoretical calculation of eddy current retarder braking torque was analyzed. Through the analysis of experimental data of braking torque of two different eddy current retarders, differential equation of eddy current conversion coefficient was established. The initial conditions of differential equation were obtained by direct search toolbox of MATLAB, and then the numerical solution of eddy current conversion coefficient was gained by Runge-Kutta method. The braking torque of an eddy current brake was calculated by the derived calculation method. The calculation data accords with the experimental data, and it is indicated that the proposed calculation method is available and can solve the difficult problems of eddy current retarder in modified optimization and new product design.

Key words: vehicle engineering, eddy current conversion coefficient, braking torque calculation, Runge-Kutta method, eddy current retarde

摘要： 分析了涡流折算系数对电涡流缓速器制动力矩理论计算的影响。通过对两种型号电涡流缓速器制动力矩实验数据的分析，建立了关于涡流折算系数的微分方程。利用MATLAB直接搜索工具箱得到微分方程的初值条件，再通过龙格-库塔法求解该微分方程获得涡流折算系数的数值解。根据这一计算方法对电涡流缓速器制动力矩进行验证计算，计算结果与实验数据基本一致，说明此计算方法是可行的且解决了电涡流缓速器在改型优化和新产品设计中存在的难题。

关键词: 车辆工程, 涡流折算系数, 制动力矩计算, 龙格-库塔法, 电涡流缓速器

CLC Number:

U463.212

Hu Donghai, He Ren, Tang Bao. Calculation Method of Eddy Current Conversion Coefficients of Eddy Current Retarder[J]. Journal of Chongqing Jiaotong University(Natural Science), 2015, 34(1): 144-148.

胡东海，何仁，汤宝. 电涡流缓速器涡流折算系数的计算方法[J]. 重庆交通大学学报（自然科学版）, 2015, 34(1): 144-148.

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