Driving method of brushless DC motor for electric vehicle

摘要

PURPOSE:To improve the high speed performance and the acceleration performance of a vehicle while enhancing the efficiency of a motor. CONSTITUTION:The duty ratio of exciting current being fed to a DC brushless motor 1 in a motor vehicle is controlled depending on the displacement of an accelerator grip 36 and the r.p.m. of a motor 1. The control lead angle of the motor 2 is varied depending on the displacement of accelerator grip and the r.p.m. of the motor.