集成发电机/起动机技术混合动力的动态转矩协调控制策略

Dynamic Torque Coordination Control Strategy of Integrated Starter Alternator Damper(ISAD) Hybrid

针对基于集成发电机/起动机(ISAD)技术混合动力各部件的特性,在实现柴油机、ISG(Integrated Starter Generator)电机、蓄电池和传动系统最佳匹配的前提下,设计了混合动力系统动态转矩协调控制策略.以转矩为控制变量,通过转矩总需求和柴油机万有特性脉谱图,确定了状态切换的条件及柴油机和ISG电机的目标转矩.采用Matlab/Simulink平台进行了CYC_ECE_EUDC工况的动力性仿真.仿真结果表明:文中提出的控制策略能够满足ISAD迅速起动、低速补偿转矩、加速提供辅助动力、充电功率恒定等要求;瞬态工况时,通过ISG电机助力,缩短了工况过渡时间;稳态工况时,通过电机转矩补偿,实现了无转矩波动的状态切换,改善了状态切换过程中动力传递的平顺性;柴油机和ISG电机工作点集中在高效率区域,SOC(Stat of Charge)维持在最佳工作区域;整车实现起步-助力-发电一体化的功能,并为开发控制软件平台提供了理论依据.

Aimed at the characteristic of each parts of system of integrated starter alternator damper（ISAD）,in this paper the dynamic torque coordination controlling strategy of ISAD hybrid with best matching of diesel,ISG,batteries,and transmission system was analyzed.Based on the requirement and map,the torque was set as the control parameter to confirm the principle and target of both diesel and ISG.On the Matlab/Simulink working plate,the implement of dynamic torque coordination controlling strategy under different work conditions was simulated and studied while a simulation test on condition of CYC_ECE_EUDC was conducted.The result shows that the strategy meets the requirements of speedy starting,compensating torque in low speed and constant charging power.Both diesel and ISG are working on the region of high efficiency,and SOC is contained at the best working area.The ISAD is carried into effect,providing a theoretical basis for further self-development of control software platform.