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- W2899396864 abstract "This paper presents a direct torque control (DTC) technique for Brushless DC (BLDC) motors with non-sinusoidal back electromotive force. DTC has some benefits such as faster torque response and reduced torque ripple for driving the BLDC motors. Because of ignoring stator flux linkage in DTC in constant torque region, BLDC motors driving is not complicated. The Sliding mode which is robust to parameter uncertainties can be used to estimate the back-EMF and generate the torque. It is employed to estimate the back-EMF waveform in a BLDC motor using only the measurements of the stator currents. The main advantages of the proposed estimator are: it is insensitive to switching noise and no filtering is required. Due to uncertainties of BLDC motor the moment of inertia and viscous damping coefficient are online identified simultaneously using recursive least square estimator. From the identified parameters the load torque is estimated. The estimated load torque is substituted into the mechanical dynamic equation to estimate the rotor speed. A modified version of Non-Dominated Sorting Genetic Algorithm (NSGA-II) is used as an effective optimization tool for regulating the PID controller parameters of speed controller and selection of four sliding mode observer gains." @default.
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- W2899396864 date "2011-01-01" @default.
- W2899396864 modified "2023-09-23" @default.
- W2899396864 title "Position sensorless for controlling brushless DC motor drives based on sliding mode and RLS estimators using NSGA-II algorithm optimization" @default.
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