Nowadays, due to excellent advantages of permanent magnet brushless (PMBL) motors such as high efficiency and high\ntorque/power density, they are used in many industrial and variable-speed electrical drives applications. If the fabricated PMBL\nmotor has neither ideal sinusoidal nor ideal trapezoidal back-EMF voltages, it is named nonideal (or nonsinusoidal) PMBL motor.\nEmploying conventional control strategies of PMSMs and BLDCMs lowers the efficiency and leads to unwanted torque ripple,\nvibration, and acoustic noises. Moreover, in many applications to reduce the cost and enhance the reliability of drive, sensorless\ncontrol techniques are used. This paper proposes a novel sensorless control for a nonsinusoidal PMBL motor with minimum torque\nripple. To develop smooth torque, the selected torque harmonic elimination strategy is employed. Furthermore, to estimate the rotor\nposition and speed, a novel full-order sliding mode observer is designed. Proposed observer estimates the position and speed of\nmotor from standstill to final speed. The proposed observer is robust to uncertainty of harmonic contents in phase back-EMF\nvoltage and able to run the motor from standstill with closed-loop control scheme.The capabilities of torque ripple minimization\nand sensorless strategies are demonstrated with some simulations.
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