This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Maximum-Current Curve Operation of Electric Vehicles for Improved Energy Recuperation during Regenerative Braking
Journal Article
14-12-02-0007
ISSN: 2691-3747, e-ISSN: 2691-3755
Sector:
Topic:
Citation:
Heydari, S., Fajri, P., Lotfi, N., and Rasheduzzaman, M., "Maximum-Current Curve Operation of Electric Vehicles for Improved Energy Recuperation during Regenerative Braking," SAE Int. J. Elec. Veh. 12(2):145-155, 2023, https://doi.org/10.4271/14-12-02-0007.
Language:
English
Abstract:
This article introduces a novel approach to maximize the harvested energy during
regenerative braking in electric vehicles (EVs) through an optimal distribution
between regenerative and friction braking. In the proposed method, the optimum
operating point of the electric motor during braking is determined based on the
driver’s brake request and real-time vehicle speed. To this end, a
maximum-current curve (MCC), which represents the maximum current that can be
recaptured during braking for a given resistive torque, is introduced, and the
electric motor operating point is maintained on this curve. In this method,
energy extraction during the regenerative braking process is maximized due to
operation on the MCC, which also leads to an extended effective range for
regenerative braking compared to traditional methods. The effectiveness of the
proposed approach is experimentally investigated on a hardware-in-the-loop (HIL)
EV testbench. It is observed that for a predefined drive cycle, an increase of
12.4% in harvested energy can be achieved by implementing the proposed method
compared to a case where traditional brake distribution is used. Potential gains
in the effective driving range of EVs as a result of increased energy
recuperation can pave the way toward a more rapid and widespread adoption of
EVs.