Abstract
In this paper, a sliding mode vector control system based on collaborative optimization of an axial flux permanent magnet synchronous motor (AFPMSM) for an electric vehicle is proposed. In order to increase the high efficiency range of electric vehicles and improve the cruising range, a collaborative optimization control strategy is firstly proposed. Due to the use of a dual stator-single rotor AFPMSM, the multi-motor efficiency optimization map and torque cooperative control are used to realize the working mode conversion of single stator and double stator, and the torque ripple caused by the working mode conversion is improved by fuzzy control. In order to improve the torque tracking capability, speed limiting characteristics, and operating characteristics, a speed limit and current vector control strategy based on a sliding mode controller is proposed and studied. The dynamic performance of electric vehicles is improved by a sliding mode vector control. Finally, a drive control system was developed for the proposed control strategy, and the complete vehicle test was carried out. The collaborative optimization control experiment and torque tracking and speed limiting experiments verify the correctness and effectiveness of the proposed control strategy. The acceleration performance and endurance experiments show that the proposed control strategy can effectively improve the cruising range and the acceleration performance of electric vehicles.
Highlights
The current sustainable development of the automotive industry faces two major challenges: oil resource shortage and environmental pollution [1]
Compared with the traditional radial flux permanent magnet synchronous motor (RFPMSM), the axial flux permanent magnet synchronous motor (AFPMSM) has the advantages of low speed and large torque, high energy density, high efficiency platform, high safety, small size, and light weight [5,6,7], so it is more suitable as an electric vehicle drive motor
A sliding mode vector control system based on collaborative optimization of AFPMSM for electric vehicle is proposed
Summary
The current sustainable development of the automotive industry faces two major challenges: oil resource shortage and environmental pollution [1]. Electric vehicles have attracted much attention due to their simple technology and better development prospects [2]. In the case that battery technology has not made breakthroughs, the motor drive system is still the focus of current research. Compared with the traditional RFPMSM, the AFPMSM has the advantages of low speed and large torque, high energy density, high efficiency platform, high safety, small size, and light weight [5,6,7], so it is more suitable as an electric vehicle drive motor. The AFPMSM can increase the high efficiency range of the system by controlling single or multiple stator operating, Energies 2018, 11, 3116; doi:10.3390/en11113116 www.mdpi.com/journal/energies
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