The Research And Realization On Driven System Of Permanent Magnet Synchronous Motor Applied On Electric Vehicles

With the increasing energy shortage and environmental pollution electricvehicles drived by electric power is a new generation of transport for the great meritsof zero pollution emissions. And the driven motor and its driven system are the coreof electric vehicles. This paper aims at the driven system of electric vehicles.Firstly, through a variety of analysis and comparison of the performance of allkinds of motors, the interior permanent magnet motor(IPMSM) is choosed for drivenmotor of electric vehicles. The mathematical model of IPMSM is analyzed and thencurve-simulated control of the maximum torque per ampere(MTPAC) is proposedfrom the perspective of industrial applications, which greatly improved the efficiencyof the system. Comparing the simulation results of the proposed method in this paperwith the traditional MTPAC,the validity and feasibility of the proposed method isverified.For the special requirements of wide speed range of electric vehicle, this paperpresents a flux-weakening control based on leading angle, and influence of motorparameters on the performance of flux-weakening control is theoretically analyzed.By constructing a new voltage outer loop to detect the voltage’s utilization on the DCbus voltage, stator current component under the flux-weakening control canre-distribute successfully. Simulation results show that the proposed flux-weakeningcontrol method can obtain a smooth transition and high times of rated speed.Moreover, due to the complex operating conditions of electric vehicles, thispaper proposes a vector control based on fuzzy PID controller. And a large number ofsimulations of the proposed method and traditional PID control are comparativelyanalyzed. The results show that fuzzy PID controller can obtain small overshoot, fastresponse time, great anti-interference ability, and is more suitable for complexoperating conditions.Finally, curve-simulated MTPAC and a flux-weakening control based onleading angle are combined in this paper and system software design and relatedprocess are introduced, which are applied on the control platform based on chip ofTMS320f2812. System dynamic response, anti-interference ability and wide speedrange are obtained by experiments and analysis, and experimental results and analysisshow the effectiveness of the proposed method in industrial applications.