关键词: 低速电动汽车, 永磁同步电动机, 直接转矩控制, 低成本, 高性能

Abstract:

As the DC series motors are the main use of the low-speed electric vehicles and the performance of the controllers are relatively poor, this paper proposes a IPMSM-DTC control system for low-speed electric vehicles with lower cost but better performance. A DSP chip MC56F8037 was used as control core, through the real-time sampling of the motor phase current, the rotor position and the DC bus voltage signal by series of low-cost sensors, the PMSM-DTC was received with real-time observing and limiting the torque angle for stable operation of the motor. The experiment results prove that the system has simple structure, high reliability and good performance.

Key words: low-speed electric vehicles, PMSM, direct trorque control, low cost, high performance