Torque coordinated control for the multi power in parallel-series HEV

The relative slow responding speed of system Electro-mechanical system, which is caused by the inertia and response lag of the engine and motors, results that the target points optimized through the upper control strategy cannot be tracked quickly and precisely. A coordinate strategy for electro-mechanical system based on dynamic response models of power sources and the mechanical system is present. The expert PID control and Model compensation control are used on Motor A and Motor B respectively, besides the engine adapts the virtual speed difference control. Furthermore, the dynamic response of state parameters can follow the optimized-state points well. The simulation results indicate that the desired control characteristic of coordinate control strategy is validated and the torque and rotation speed fluctuations of the motors and engine decrease significantly.