Electric motor efficiency optimization as applied to electric vehicles

This work contributes to the development of control techniques for the drive systems of battery-powered electric vehicles, hybrid electric vehicles HEVs, 1^st by introducing the design of a new motor efficient controller, in order to improve the energy efficiency of electric motors drives in HEVs and 2^nd to achieve a fast torque response by applying a Seamless Direct Torque Control (DTC) method for the electric motor Variable Speed Drive (instead the commonly used FOC method), in the HEVs technology. The design of a Motor Efficiency Controller, based on the optimum reduction of the electric motor´s magnetic flux, which achieves fast and accurate convergence to the point of electric motor´s electromagnetic loss minimization in case of changes in load or in speed, as well as to be insensitivity to electric motor´s parameters variations.