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1 Maszyny Elektryczne : zeszyty problemowe

1 2009

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Regenerative braking in an electric vehicle

Cody J., Göl Ö., Nedic Z., Nafalski A., Mohtar A.

Maszyny Elektryczne : zeszyty problemowe

2009

Nr 81

113-118

Electric vehicles have been attracting unprecedented attention in light of the volatile market prices and prospect of diminishing supplies of fuel. Advances in battery technology and significant improvements in electrical motor efficiency have made electric vehicles an attractive alternative, especially for short distance commuting. This paper describes the application of Brushless DC (BLDC) motor technology in an electric vehicle with special emphasis on regenerative braking. BLDC motors are being encountered more frequently in electric vehicles due to their high efficiency and robustness; however a BLDC motor requires a rather complex control to cope with the reversal of energy flow during the transition from motoring regime to regenerative braking. In an electric vehicle, regenerative breaking helps to conserve energy by charging the battery, thus extending the driving range of the vehicle. There is a number of different ways to implement regenerative braking in a BLDC motor. This paper describes the Independent Switching scheme for regenerative braking [1] as applied to a developmental electric vehicle at the University of South Australia.