车用鼓式电磁制动器电磁体磁路

分析了新型车辆制动器——电磁制动器制动过程的机理及其关键部件电磁体的受力与磨损状况，根据电磁体磨损面内外侧磨损的不均匀以及电磁体工作过程中的旋转倾向，提出并设计了非长短轴对称的准椭圆形电磁体磁路，通过电磁场分析软件Ansoft Maxwell 3D对电磁体磁路进行了分析和理论计算，并对电磁体结构进行了优化。仿真和试验结果表明，电磁制动器制动时电磁体工作平稳，磨损均匀，制动力满足特定车型的要求，为实现车辆线控制动打下了基础。

MAGNETIC CIRCUIT OF ELECTROMAGNET IN DRUM-TYPE ELECTRO-MAGNET BRAKE FOR VEHICLES

The braking Mechanism of a new-type vehicle brake, electromagnetic brake, as well as its pressure and abrasion on the critical component of electromagnet are analyzed. To minimize the unevenness of abrasion on both sides of the friction surface of the electromagnet and its rotational tendency in operation, a non-axial-symmetry quasi-oval-shaped magnetic circuit is proposed and designed. Theoretical calculation and analysis are conducted on the electromagnetic circuit with electromagnetic field analysis software Ansoft Maxwell 3D, and the electromagnet structure is optimized. Smoothness of the electromagnet in braking operation and abrasion uniformity are proved through simulation and experiment. Meanwhile, the braking power requirements of the specific vehicle model are met. Thus, it provides the basis for implementing the brake-by-wire method for vehicles.