Abstract
This paper describes an induction motor drive for use in electric propulsion. The specifics of the application (electric vehicle) require fast response and high efficiency for the drive. Direct torque control (DTC) is used to control the motor. In this control strategy, efficiency is optimized by adjusting the magnetic flux of the motor. The sensitivity of the DTC to temperature variations, leading to stator resistance changes, is eliminated by online estimation of stator resistance.
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