车用自由活塞膨胀机-直线发电机系统发电机性能研究  

Free Piston Expander-Linear Motor System Generator Performance Study

作　　者：党瑾希 童亮[1] 许永红 任继愈 Dang Jinxi;Tong Liang;Xu Yonghong;Ren Jiyu(Beijing Information Science and Technology University,Beijing 100192;Beijing University of Technology,Beijing 100124)

机构地区：[1]北京信息科技大学,北京100192 [2]北京工业大学,北京100124

出　　处：《汽车技术》2020年第5期31-36,共6页Automobile Technology

基　　金：北京市自然科学基金面上项目(3192014)。

摘　　要：针对汽车余热回收系统中的自由活塞膨胀机-直线发电机系统对直线电机的应用需求,以适用于该系统的一款无铁心永磁同步直线电机为研究对象,通过电磁场理论分析电机模型,搭建ANSYS Maxwell二维瞬态场模块,分析了电机空载、负载工况的磁场特性和极弧系数、气隙长度等参数对电机推力性能的影响,并进行了参数优化以减小电机的推力波动。仿真结果表明:在相同结构参数下,极弧系数和气隙长度相互作用,可以有效降低电机的推力波动。In order to meet the demand of linear motor for the free piston expander-linear generator system in the vehicle waste heat recovery system, a coreless permanent magnet synchronous linear motor which is suitable for this system is studied. Firstly, the motor model is analyzed by electromagnetic field theory, and the ANSYS Maxwell two-dimensional transient field module is built. Secondly, the influence of magnetic field characteristics of the motor no-load and load conditions and other parameters like pole arc coefficient and air gap length on thrust force performance of the motor is analyzed. Parameters are optimized to reduce thrust performance of motor. The simulation results show that under the same structural parameters, the pole arc coefficient and the air gap length interacts, the thrust fluctuation of the motor can be effectively reduced.

关 键 词：余热回收系统 无铁心永磁同步直线电机 极弧系数 气隙长度 电机推力 

分 类 号：U664.132[交通运输工程—船舶及航道工程]