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Sinusoidally-fed permanent magnet brushless dc (PM BLDC) motors are supposed to develop effectively ripple-free dynamic torques. This is done by having a sinusoidal flux density distribution in the airgap followed by a rotor position dependent sinusoidal excitation of the phase windings. There are different rotor topologies used in these motors. In this paper, five types of generally used rotor topologies...
We have investigated a method to regulate the voltages in the secondary windings of an induction machine stator with multiple windings. By introducing one or more triple-n harmonics in a three-phase machine, the rectified output voltage of one or more grounded-wye windings can be controlled and regulated. Voltage regulation is achieved through triple-n harmonic current injection, so there is no net...
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