混合励磁电机的电动汽车增程器控制策略

Control Strategy for Electric Vehicle Range-Extender Based on Hybrid Excitation Generator

针对增程器转速功率动态协调控制问题,提出了一种基于混合励磁电机的新型电动汽车增程器,阐述了其控制系统结构及工作原理.根据混合励磁增程器整体效率特性确定了多转速点工作区域,基于混合励磁电机气隙磁场的柔性可调特性,设计了围绕工作区域的增程器转速-功率解耦发电双闭环控制算法.利用MATLAB/Simulink搭建控制策略模型,基于自行开发的混合励磁增程器原理样机进行了试验验证.试验结果表明,混合励磁增程器输出发电功率动态响应快,转速、功率控制稳态误差小,稳态及瞬态运行工况均位于设定工作区域内,发电控制策略可行.

Based on a hybrid excitation generator,a novel electric vehicle range-extender was proposed and the control system structure and the working principle were described.The multi-speed point working area was determined,according to the overall efficiency characteristics of the hybrid excitation range-extender.Based on the flexible adjustable characteristics of the air-gap magnetic field of the hybrid excitation generator,a double-closed-loop generation control algorithm was designed by decoupling the speed-power around the working area of the range-extender.The control strategy model was built by using MATLAB/Simulink and verified based on the prototype of the self-developed hybrid excitation range-extender.The test results show that the hybrid excitation range-extender has fast-dynamic response of output power and small steady-state error of speed and power control.Further,the steady-state and transient operating conditions are both located in the set working area.Therefore the power generation control strategy is feasible.