Modelling and Comparing Different Control Strategies of Regenerative Braking

Short-range electric vehicles are one of the roadblocks to electric automobiles obtaining widespread customer acceptance and becoming a significant market participant. A hybrid electric or fully electric car's fundamental advantage is the ability to recover vehicle energy that would otherwise be lost as heat while braking.

Regeneration has the ability to address this issue by assisting in range extension through the recovery of vehicle energy during braking. The installation of a motor-generator changes the braking control and dynamics significantly when compared to a typical vehicle with friction braking. Two regenerative braking concepts, serial and parallel, were investigated and applied on an electric car in this study.

We try to draw a conclusion about the difference in energy recovery levels between the two techniques based on the results.

The proposed brake torque distribution strategy has been tested through the simulation of the Federal Test Procedure (FTP75) and New European Driving Cycle (NEDC) drive cycle and straight-line braking scenario.

The results indicate that serial regenerative braking outperforms parallel regenerative braking, indicating that more time and effort should be spent on it. This study's simulation tests were done for a longitudinal braking scenario. Effects of lateral motion and cornering manoeuvres need to be studied further.

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