Abstract

This paper proposes an energy efficiency control strategy for electric vehicles (EV) equipped with continuously variable transmission (CVT). The strategy is based on a fuzzy controller that acts directly on the ratio of the CVT system, and uses the maximum efficiency motor rotation speed as a reference. Different to earlier proposals, this project involved the development of a more precise system that optimizes the maximum efficiency function of the PMDC motor for use as a reference for the controller. A full characterization of the system is provided, together with the results of simulation modeling employing different types of routes taken by the vehicle.

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