Research on Torque Distribution Strategy for Electric Vehicle Based on Hybrid Particle Swarm Optimization
To distribute torque between front and rear shafts of the powertrain with dual motors in electric vehi-cles,a whole vehicle model of dual motors electric vehicle is built by Simulink andAVL-Cruise software.Based on the configuration characteristics of electric vehicle,the efficiency mathematical model of powertrain with dual motorsis es-tablished.Taking the overall efficiency of the powertrain as the optimization goal,the torque distribution coefficient is iteratively optimized by hybrid particle swarm optimization algorithm within the constraint range of the front and rear axle motors characteristics.The simulation results show that the torque distribution strategy can achieve reasonable torque distribution to meet the driving demand of vehicles under single operating condition and continuous operating condition.Under NEDC,CLTC-P and WLTC three cycle conditions,the driving range of electric vehicles with this strategy is extended by 11.71%,9.06%and 9.46%.The economy of powertrain with dual motors in electric Vehicle-has improved significantly.
Electric vehiclesDual motors drive systemTorque distributionHybrid particle swarm optimization
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