MAGNETIC CIRCUIT OF ELECTROMAGNET IN

DRUM-TYPE ELECTRO-MAGNET BRAKE FOR VEHICLES

Quan Li  Chen Zhaozhang  Yang Zebin

(School of Electric and Information Engineering,Jiangsu University, Zhenjiang 212013)

Li Zhongxing

(School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013)

Huang Guoxing

(Zhejiang Asia-Pacific Mechanical & Electrical Co., Ltd. Hangzhou 311203 )

Abstract: 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.

Key words: Electromagnetic brake  Electromagnet  Non-axial-paralleled magnetic circuit

CLC No: TM574

浙江省科技厅重大科技攻关资助项目(2003C11018). Received 20050309, received in revised form 20050930