Abstrad This paper addresses the non-linear problem of regulating the DC link voltage, in a vector controlled threephase boost type PWM converter with particular emphasis on applications in wind energy systems. The AC side current control is performed in a synchronously rotating reference frame. An analysis of the system is provided and several alternative DC link voltage controller designs are...

In this work a new MRI modality entitled Relaxation Along a Fictitious Field in the rotating frame of rank 4 (RAFF4) was evaluated in its ability to detect lower myelin content in lysophosphatidyl choline (LPC)-induced demyelinating lesions. The lesions were induced in two areas of the rat brain with either uniform or complex fiber orientations, i.e., in the corpus callosum (cc) and dorsal tegm...

We investigate non-inertial effects induced by a rotating frame on non-relativistic quantum harmonic oscillator as well of the topology associated to screw dislocation, which corresponds distortion vertical line into spiral. To do this, we obtain analytical solutions time-independent Schr\"odinger equation for this potential in background. The expressions energy spectrum are obtained and four s...

Magnetic reconnection process in the ergosphere is investigated for a relativistic plasma around rotating non-Kerr black hole. For hole immersed magnetic field generated by an externally material, anti-parallel line could form due to frame dragging. Therefore, occur ergosphere. Such may generate negative energy at infinity redistributing angular momentum during process. The results show that, w...

The junction conditions for General Relativity in the presence of domain walls with intrinsic spin are derived in three and higher dimensions. A stress tensor and a spin current can be defined just by requiring the existence of a well defined volume element instead of an induced metric, so as to allow for generic torsion sources. In general, when the torsion is localized on the domain wall, it ...

For the purpose of understanding the effects of rotation on wave propagation within a tire’s treadband, the vibration of an inflated, circular cylindrical shell, rotating about a fixed axis has been considered here. The equations of motion of the rotating shell are formulated in a fixed reference frame (i.e., Eulerian coordinates). By assuming wave-like solutions for the free vibration case, th...

In this study, two-dimensional electro-mechanical analysis of a composite rotating shaft subjected to non-axisymmetric internal pressure and applied voltage is investigated where hollow piezoelectric shaft reinforced by boron nitride nanotubes (BNNTs). Composite structure is modeled based on piezoelectric fiber reinforced composite (PFRC) theory and a representative volume element has been cons...

ABSTRACT High-redshift observations are often biased towards massive and bright galaxies that not necessarily representative of the full population. In order to accurately study galaxy evolution mass assembly at these redshifts, ‘normal’ main sequence required. Here we present Atacama Large Millimeter/Submillimeter Array (ALMA) 0.3 arcsec resolution [C ii] emission line 158 μm HZ7, a z = 5.25. ...

PWM Inverters need an internal current feedback loop to maintain desired current level. The current feedback scheme helps in providing desired current to ac loads connected to the inverter. The performance of the inverter depends largely on the quality of the applied current control strategy. Various current regulation schemes include stationary frame regulators and synchronous frame regulators...