摘要
为有效降低驱动电机能量消耗,延长电动汽车续驶里程,对车辆工况变换时的驱动系统控制方法进行探讨。利用交流异步电机系统及磷酸铁锂电池组实测数据,采用最小二乘法构建动力总成系统效率模型,并给出基于效率模型进行优化控制、提高电力驱动系统运行效率的控制策略;搭建纯电动汽车动力总成系统仿真模型,并通过试验台实测数据验证模型的有效性;利用建立的仿真模型对纯电动汽车的起步加速过程进行优化,并利用试验台进行了测试,结果表明,对动力总成系统进行效率优化控制后,其效率在车辆起步加速过程中较原车平均提高了3.3%。基于所建立的动力总成系统效率模型,可在车辆工况变换过程中,通过优化控制策略,有效提高动力驱动系统效率。
A control strategy of Electric Vehicle（EV） powertrain under dynamic operation conditions was optimized in order to lower power consumption and prolong EV＇s endurance mileage.Based on measured data from an AC asynchronous motor and a LiFePO4/C Li-ion battery pack,a powertrain＇s working efficiency describing model was developed.An optimal control method to improve EV powertrain＇s efficiency was deduced following the model.To verify the method,a powertrain＇s simulating model was established,and its validation was conformed in contrast to the results of experiments.An EV＇s start acceleration process control strategy was optimized according to the simulating results,and the strategy was implemented in the test bench.The testing results show a 3.3% efficiency improvement of the new strategy over the original one,which suggests that this powertrain efficiency model can be used to optimize the control strategy at dynamic operation conditions.
出处
《电机与控制学报》
EI
CSCD
北大核心
2012年第3期53-59,共7页
Electric Machines and Control
基金
国家高技术研究发展计划(863计划)项目(2009AA11A118)
山东省科技发展计划项目(2011GGX10506)
山东大学研究生自主创新基金(yzc10123)
关键词
纯电动汽车
优化控制
工况变换
效率模型
动力总成仿真模型
electric vehicles
optimal control strategy
dynamic operation condition
efficiency model
powertrain simulating model
