A novel control scheme for electric vehicle EV-drive Online publication date: Wed, 24-Dec-2008
by Adel Sharaf, Wen Chen
International Journal of Electric and Hybrid Vehicles (IJEHV), Vol. 1, No. 4, 2008
Abstract: The paper presents a novel non-linear error-driven error-scaled multi-loop dynamic speed control scheme for electric vehicle EV-PMDC drives. The proposed controller is a dynamic self-adjusting regulator to ensure satisfactory reference speed tracking, minimum inrush PMDC-motor current and minimum impact on the limited battery source capacity. It handles the inherent non linearity in the EV-drive moment of inertia, frictional coefficient and load torques. The full four motor EV-drive is fed from a DC source battery with type-B DC-DC converter (chopper) – a pulse-width modulated strategy that is fully modulated, using the non-linear multi-loop dynamic error-driven control scheme. As a comparison, a classical PID scheme is also presented. Digital simulation results show the effectiveness of the non-linear multi-loop control strategy and its robustness to tolerate load non-linearities, especially in combined inertia, frictional coefficient and load torques.
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