Regenerative Braking Control Strategy

The research on Electric Vehicle(EV) is renewed getting more and more attention due to the serious environemental pollution and evergy shortage. The Key technologies of electric vehicles including management sysytem of vehicle, drive system, battery and its management system. Electric vehicle braking energy recovery is unique, belonging to the field of control and management of energy use in EV,It is important to imoprove the efficiency of energy use in EVWhen the electric car is braking, the driving motor can run in the power generation state and transmit the energy power outside. If vehicle braking energy back to the battery,and charge the sotorage battery, in that case this process can extend the critical of driving electric vehicles. Meanwhile, the electric brake can slow down the friction loss caused by the mechanical brake. Braking energy recovery related to the ratio of mechanical brake with the motor brake, involves transmission mechanical system of electric vehicles,motor parts and battery to vehicle dynamics into account, the electrical power generation characteristics, and charging the battery, and the other safe guarantee. Currently in China, the study on baraking energy recovery is still in the initial stage, remaining in the theory and practical application of the braking strategy is simple. This papar made some positive explore, and got some useful conclusions.The first part of this papar describes the relevant knowledge of the braking evergy recovery and technical principles,Meanwhile reviewes the last international and home research in this domain. Throught analyzing the process of automobile braking and energy transferring with characteristics of vehicle drive motor, battery and its safe guarantee,this paper got three baking modes and concludes soe constraint conditions of braking energy regenerationThe second part of this paper analyzes the driver's driving intention recognition, correct the situation by stepping on the pedal and reasonable translation to the brake controller (like the Avatar control car). On the base of driver model and constraints of braking energy recovery, taking into account the full use of motor overload and do not burn out the motor, a motor based on temperature constraints algorithm for overload control of energy recovery Control of braking energy recovery algorithms,in addition the simulation model is also constructed with SIMULINK. The third part of this paper introduces the hard ware of the braking energy recovery strategy controller and the software implementation control algorithm, and real-time display the brake status by the Labveiw Finally, this paper add some supplements for the inadequate of this system,and do a little vision and expectations for the braking control strategy.