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In this paper we consider continuum models of power system networks divided into clusters, and present a model reduction method to derive the analytical expressions for frequency waves propagating from one cluster to another depending on the network topology. Previous results have modeled such electromechanical waves mostly for two-area radial transfer paths, i.e., for two-node line graphs. Our results...
Physical mechanisms those interplay in generating super continuum from femto-second pulses propagated through photonic crystal fiber (PCF) have been investigated here. We compare spectrums from two distinct PCFs with different group velocity dispersion profiles to determine the most desirable spectral features such as stronger and ripple free output spectra at wavelength regions of interest, specifically...
In this paper we consider continuum models of large distributed power systems defined over dynamic equivalent clusters, and derive a model reduction method to illustrate how oscillations can propagate from one cluster to another in the form of equivalent frequency waves depending on the topology of their interconnections. Previous results in [1], [2] have modeled such electromechanical waves mostly...
An analytical model is developed to determine the 3-D potential distribution of a fully-depleted silicon-on-insulator (SOI) four-gate transistor (G4-FET). The potential variations along the channel and between the junction-gates are assumed to be parabolic due to short channel effect and presence of MOS gates. Using these assumptions and with necessary boundary conditions, the 3-D Poisson's equation...
The sensorless drive system is more versatile due to its small size and low cost. Therefore it is advantageous to use the sensorless system where the speed is estimated by means of a control algorithm instead of measuring. This paper presents a new model reference adaptive system (MRAS) speed observer for high-performance field-oriented control induction motor drives using neural networks. The proposed...
This paper presents a comprehensive simulation model of a five-phase induction motor drive system. Both open-loop and closed-loop control is elaborated. The complete component modeling is developed using `simpower system' blocksets of Matlab/Simulink. To address the real time implementation issues, dead banding of the inverter switches are also incorporated in the simulation model. To validate the...
A new double gate MOS structure that uses intrinsic Si as the active material is proposed in this paper for photo-voltaic application. In this device recombination of optically generated charge carriers will be low as the active region is intrinsic in nature and the carriers will travel at high velocity under the effect of external electric field. The open circuit voltage (VOC), short circuit current...
A mathematical model is developed to determine the 3-D potential distribution of a fully-depleted silicon-on-insulator (SOI) four-gate transistor (G4-FET). The potential distributions along the channel and between the junction-gates are assumed to be parabolic due to short channel effect. Using these two assumptions, the 3-D potential distribution model is developed. From the 3-D model, expression...
Multi-phase ac motor drives are nowadays considered for various applications, due to numerous advantages that they offer when compared to their three-phase counterparts. Variable speed induction motor drives without mechanical speed sensors at the motor shaft have the attractions of low cost and high reliability. This paper analyses operation of a Model Reference Adaptive System (MRAS)-based sensorless...
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