Development of a New Sensorless Vector-Controlled and Transmissionless Electric Vehicle Using a Permanent-Magnet Synchronous Motor

摘要

One of the most important technologies for electric vehicles (EVs) will be drive control technology for the main motor. It is desired that the drive control technology have the following characteristics. (1) It does not require a position/speed sensor for controlling motor drive, which has been mounted on the rotor shaft. (2) It has vector controls that can produce torque quickly, efficiently, and/or precisely. (3) It has wide driving-range and allows developing EVs with no variable transmission. This paper proposes new drive control technologies for such EVs using a permanent-magnet synchronous motor as a main motor, and verifies its usefulness through development of an actual EV that can drive on public roads.