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Direct Torque and Indirect Flux Control
of Brushless DC MotorAbstract—Inthis paper, the position-sensorless direct torque and
indirect flux control of brushless dc (BLDC) motor with nonsinusoidal
back electromotive force (EMF) has been extensively investigated.
In the literature, several methods have been proposed for
BLDC motor drives to obtain optimum current and torque control
with minimum torque pulsations. Most methods are complicated
and do not consider the stator flux linkage control, therefore, possible
high-speed operations are not feasible