DTC Control of BLAC and BLDC Motors for Pure Electric Vehicles

Abstract

While creating an industrial system which has an electric motor, the designers should to be think over not only control method but also motor type to create successful and efficiency system. If created system is an electric vehicle, designers have two powerful candidates as traction motor: Brushless AC (BLAC) or Brushless DC (BLDC) motors. In this study, a comparative performance investigation and evaluation are presented between direct torque controlled (DTC) Brushless AC and Brushless DC motors which have been considered as traction motor on electric vehicles. In addition, a short review to BLAC and BLDC motor technology is also included. The basics of the DTC method are presented and small-scale pure electric vehicle model is created and integrated to the motor control model. The BLAC and BLDC motors modeled as having the same electrical parameters and simulated with same control model parameters in order to make fair comparison. The simulation studies have proved that DTC controlled BLAC and BLDC motors have closer performances as vehicle traction motor, and both motor types can be allowed as a good candidate for pure electric vehicles applications.