Research On Driving System Of The EV With Regenerative Braking

Technique of the Electrical Vehicle (EV) comprises many subjects such as automobile technique, electricity technique, electronics technique, the information technique and the chemistry technique etc. In fact, it is crucial to the success of the Electrical Vehicle to combine all of the technique in any field. There are two important parts which influence the performance of the Electrical Vehicle, the driving system and the energy management. The driving system should have the property of high torque with low speed and low torque with high speed at the start, Broad reign of the speed which can cover the reign of constant torque and constant power,fast respondent characteristic of the torque, high efficiency for the regenerative braking, And the ability works dependably under different work condition.Aiming at the property of the driving system and request of the regenerative braking, the following control strategies are adopted, and the conclusion is demonstrated.First, a serial of controlling strategies are put forward including the control of the armature voltage, forecasting control of the armature current and forward feedback control of the excitation. The property of high torque with low speed and low torque with high speed are proved.Second, three different controlling strategies for the regenerative braking are stated, the merit and shortcoming is compared, and the simulation and experiment proved the effect.Third, comparing on the classical control theory and the forecasting control theory, the result proves that the latter is suited for the golf car from the perspective of safety, precision, and the parameter adjustability. The above conclusion certificates that the control of the armature voltage, forecasting control of the armature current and forward feedback control of the excitation not only satisfies the property of constant torque and constant power, but also more stable contrasts to control strategy the classical PI.