汽车永磁无级缓速器的设计与仿真分析

汽车永磁无级缓速器有利于实现各种路况下的最佳缓速制动.笔者研究了永磁缓速的工作原理,提出了一种新型轴向移动式的无级调速设计方案,通过理论分析计算确定了设计参数,并采用Matlab中的fmicon函数模块进行二阶非线性结构优化得出关键结构的最优解.利用ANSOFT软件建立了三维电磁场有限元仿真模型,对永磁缓速器进行磁场和制动力矩的静态和瞬态分析,分析磁场的分布特点和影响因素,对转子总成与定子鼓之间不同轴向位置的制动力矩分析表明,该缓速器能够实现良好的线性控制和稳定的制动力矩输出,能够满足无级缓速制动的需要.

Design and simulation analysis of an automotive permanent-magnet stepless retarder

The automobile permanent magnet stepless retarder is beneficial to achieving for the best slow braking under various road conditions. In this paper, the working principle of permanent magnet retarder is studied and an axial moving type stepless speed regulation design scheme is proposed. The design parameters are determined by theoretical analysis and calculation, and the second-order nonlinear structure optimization is performed by using the fmicon function module in Matlab to obtain the optimal solution of the key structure. A three-dimensional electromagnetic-field finite-element simulation model is established by ANSOFT software. The static and transient analyses of the magnetic field and the braking torque are performed to investigate the distribution characteristics and influencing factors of the magnetic field and the braking torques at different axial positions between the rotor and the stator. The results show that the retarder can achieve good linear control and stable braking torque output, which can meet the needs of the stepless retarding braking.