Controller for automatic mechanical transmission with two tranches for electric vehicle
                                        WU Qing miao1, XIE Wei dong2, CHEN Jing tao2, SUN Sheng deng2
（1.Zhejiang Unitemotor Co., Ltd., Yongkang 321300, China;2.School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310000, China)

Abstract: Aiming at the problems of poor quality and low economy of gear shifting of electric vehicle, the new type of electronically controlling AMT was proposed. The transmission was based on the structure and principle of normal AMT. The DC brush motor was used as a select and shift gear motor of electronically controlling AMT. Therefore, MPC5634 microcontroller from Freescale was selected to design the hardware circuit of the transmission controller, and the main program and various sub module programs of the controller were designed by referring to the basic control mode of normal electronically controlling AMT, and the CAN communicating module and serial communicating modules for achieving the data transferring between ECU and the controller of the electronically controlling AMT were added. The bench tests of gear shifting of the controller indicates that the design of the controller can be an efficient shifting operation and a stable performance.

Key words: electric vehicle; automatic mechanical transmission(AMT); CAN communication; shift motor