Traction Control of Electric Vehicle based on the ...（电动汽车的牵引力控制系统的基础上,u2026）.pdf

Traction Control of Electric Vehicle based on the Estimation of Road Surface Condition - Basic Experimental Results using the Test EV UOT Electric March - Yoichi Hori, Yasushi Toyoda and Yoshimasa Tsuruoka Department of Electrical Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, 113 Japan Phone: +81-3-3812-2111 ext 7680, Fax: +81-3-5800-3865 E-mail: hori@kaya.t.u-tokyo.ac.jp, Homepage: http://www.kaya.t.u-tokyo.ac.jp/ Abstract - The most distinct advantage of electric . is defined by eq.(1), where Vw and V are the wheel vehicle is in its quick and precise torque generation. We and vehicle speeds. propose two novel traction control techniques of electric vehicle, i.e., the model following control and the optimal = Vw -V Vw (1) slip ratio control. Their effectiveness is demonstrated by using the test vehicle UOT Electric March. The side force takes its maximum value when =0 and becomes smaller for bigger . If increases by sudden I. INTRODUCTION decrease of road friction, the side force gets smaller drastically. This causes serious problems: drift-out in front Recently a lot of electric vehicles (EV) have been wheel driven cars, spin in rear wheel driven cars, and drift- developed to solve environment and energy problems caused out with rotation in four wheel driven cars. Such a loss of by the use of internal combus