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In this 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...
The inherent vulnerability to mechanical failures, extra cost, and size associated with external position sensors such as optical encoders and Hall sensors has motivated many researchers to develop sensorless control techniques for SRM drives. In this paper a flux linkage method and dual layer controller is developed to estimate rotor position and speed of a low-voltage Switched Reluctance Motor (SRM)...
In this paper, the position sensorless direct torque and indirect flux control (DTIFC) of BLDC motor with non-sinusoidal (non-ideal trapezoidal) back-EMF has been extensively investigated using three-phase conduction scheme with six-switch inverter. In the literature, several methods have been proposed to eliminate the low-frequency torque pulsations for BLDC motor drives such as Fourier series analysis...
A new structure of brushless DC (BLDC) motor with passive magnetic bearings is introduced in this paper. The magnetic suspension of the rotor is realized by using the proposed passive magnetic bearings and does not need to be controlled. The axial stability of the rotor can be obtained by the radial force of the passive magnetic bearings and by the instinctive behavior of the PM motor in axial alignment...
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