Abstract
This paper proposes the estimation and improvement method of the energy efficiency of the electric vehicle (EV) using wound-field synchronous motor (WFSM). For the proposed methods, 1) an EV model as well as the mathematical model of the electric motor are explained considering the common Artemis driving cycle (CADC), 2) a control method for achieving the maximum energy efficiency of the electric motor is proposed, 3) the evaluation methods of the circuit parameters and losses are described to predict the accurate efficiency of the machine. Furthermore, based on the proposed methods, the design process of the WFSM to improve the energy efficiency considering the vehicle system and driving cycle is proposed.
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