ADTR-Motor Drive for Electric Vehicle.

A new motor (ADTR-motor: Anti-Directional Twin Rotary Motor) for electric vehicle drive is proposed. A stator in a conventional motor is reformed to be movable, and the stator (outer rotor) and the rotor (inner rotor) rotate in anti-directions. The IM-type ADTR-motor and the SM-type ADTR-motor are considered, and in this paper a prototype of the IM-type ADTR-motor is constructed experimentally. When the ADTR-motor is used for an EV drive, the direction of one of the rotors should be reversed. Both rotors, when rotated in the same direction, propel the two wheels of EV. The torque of the wheels can be balanced without differential gear. The fundamental characteristics of ADTR-motor are clarified. The characteristics are the structure of ADTR-motor, the equivalent circuit parameters, the torque balance theory, the torque-speed characteristics, the rotor speed transient characteristics, and the transient response under the speed sensorless torque control. [ABSTRACT FROM AUTHOR]