Research On Regenerative Braking Control Strategy Of Switched Reluctance Motor Based On DITC

Battery Electric Vehicles(BEV)have the advantages of environmental protection,economy and high utilization of energy.But due to the influence of battery technology,its endurance is not enough.The regenerative braking energy recovery systems in BEV can not only reduce the energy consumption of the vehicle,but also effectively increase the endurance of the vehicle.The efficiency of the motor drive system will impact on the regenerative braking energy conversion performance of BEV directly.Therefore,it is of great significance to study the control method of motor in regenerative braking.The Switched Reluctance Motor(SRM)has the advantages of large starting torque,wide speed range,high efficiency,and frequent starting and stopping.Therefore,this paper focuses on the regenerative braking control method of SRM for vehicle.Under the premise of guaranteeing the safety of braking,a direct instantaneous torque braking control strategy based on improved Torque Sharing Function(TSF)is proposed.In this paper,the energy recovery efficiency is taken as the research objective.Through the research of braking control strategy,the energy regeneration of SRM is realized,and the braking control performance of vehicle is improved at the same time.Firstly,the braking principle of SRM and the change of regenerative braking energy are analyzed,and a nonlinear model of SRM based on ansoft is established.Then,the principle and advantages of improved TSF are analyzed.The direct instantaneous torque control based on improved TSF is proposed and applied it to regenerative braking control system of SRM.According to the influence of different control parameters on energy feedback,the nonlinear dynamic speed regulation simulation system of SRM based on Matlab is developed.Through the analysis of the simulation results,the feasibility of the regenerative braking control strategy of SRM is verified.Finally,the hardware platform of 11 k W three-phase 12/8 pole SRM was built and the experimental data further verify the practicability of the control strategy.In order to study the influence of the braking control strategy on the braking energy feedback of BEV.The Hardware In the Loop(HIL)simulation system based on RT-LAB and the simulation model of regenerative braking control system in BEV based on ADVISOR are built.Under different working conditions,it is proved that the improved control strategy has higher efficiency of braking energy recovery than the traditional control strategy by through the analysis of different parameters of motor and battery.