Design of Electronic Differential and Sliding Mode Controller for a Direct Electric Vehicle Wheel Drive

摘要

Traction drives used in electric vehicles can be divided into two categories, (i) single drive systems, and (ii) multi-drive systems. In the multi-drive systems the electronic differential has to replace the behaviour of the mechanical differential. Hence a difference between the speeds of the left and right wheel drive must be allowed. The objective of this paper is to present design of an electronic differential for a direct electric vehicle (EV) wheel drive, and design of sliding mode controller for a 4-switch 3-phase inverter. 4-switch 3-phase inverter is particularly suitable for this application as the supply batteries can be easily split into two separate battery tanks. Rear wheels of the electric vehicle are directly driven by permanent magnet brushless disc motors. Results have proved that this arrangement can be successfully implemented into EV s.