Research On Motion Control Of Dual Rotor Motor For Hybrid Electric Vehicle

As the energy crisis and environmental issues become more prominent,new energy vehicles have been the development trend of the automotive.Compared with the pure electric vehicles(EV),hybrid electric vehicle(HEV),which has the obvious superiority in endurance mileage,has become the hotspot in the field of automotive engineering.Because of the perfect driving performance and fuel economy,the HEV with planetary gear has been accepted by the majority of consumers,in which,the planetary gear is the power split device(PSD)of the series-parallel HEV.The PSD of the HEV contains a generator and a planetary gear,which suffers some inherent shortcomings,such as mechanical wear and vibration.So the pure electric PSD will be development direction of hybrid engineering.Different from the mechanical gears,the electromagnetic gear can avoid the mechanical wear and tear,which makes the whole system more reliable.There are the same kinematic characteristics between the coaxial magnetic gear and planetary gear.So the magnetic-gear power split motor(MGPSM)can function as the PSD of the HEV system.The operating principle of MGPSM is studied in this paper,and the mathematical model and control Simulink model are established.Finally,the application in HEV is analyzed and validated.The main research contents of this thesis can be summarized as follows:1.Based on the coaxial magnetic field modulation principle,the operation principle of MGPSM is analyzed,the speed and torque relationship between stator and rotor is also deduced.The direction of the outer air-gap magnetic field is oriented.Therefore,the motion control strategy of the MGPSM can be studied as the counterpart of a common PMSM.2.The operate mode and the power flow of MGPSM are introduced and analyzed in this thesis.The simulation model based on vector control and direct torque control is established on MATLAB/Simulink platform.The simulation results show that the MGPSM motor offers good steady and dynamic preferences in the application of HEV.3.The hardware circuit of the MGPSM motor is designed and implemented.It includes STM32 minimum core board,voltage and current sampling circuit,the position detection circuit and IGBT driver circuit.4.The software of the MGPSM motor is designed and the decoupling algorithm of the dual rotor motor is realized,and the software flow is constructed.5.The MGPSM motor has been tested,including the hybrid experiment and direct torque control experiment.An experimental platform for hybrid powertrain is constructed.The distribution of the power flows can be regulated by the developed algorithm.Finally,the application of direct torque control in MGPSM motor is verified by the principle prototype.