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We present a numerical investigation of the conductance and shot noise behavior of a cascade of realistic tunnel barriers, defined in a GaAs/AlGaAs heterostructure using negatively biased depletion gates. We show that, even in the presence of irregularities in the gate boundaries, strong localization dominates the transport through the device and consequently the shot noise suppression factor does...
Transport properties of single and multiwalled carbon nanotubes, with the tube axes aligned along the bias current direction, have been studied as a function of the temperature and applied current. The experimental data are consistent with a model of charge transport governed by tunnel between potential barriers created at the connection between the nanotubes or bundles surfaces and modulated by thermal...
In this paper, we study the impact of random discrete dopants in the source/drain (S/D) leads on the current variability of a gate-all-around Si nanowire transistor. Due to the strong inhomogeneities of the self-consistent electrostatic potential, a fully3Dreal-space nonequilibrium Green's function (NEGF) formalism is used. N-channel transistors with random discrete donors in the S/D regions varying...
Experimental investigation of electrode potential voltage drop in liquid metal magnetohydrodynamic(LMMHD) power generator is presented in the paper. Resistance between two electrodes were measured by micro-ohmmeter with 0~20 mOmega range in different apart distance of electrodes and contact surface area. The results show that the contact resistance between liquid metal and copper electrode is very...
The stator-doubly-fed doubly salient (SDFDS) motor for electric vehicles rotates with constant torque below basic speed, whereas with constant power by weakening flux over basic speed. The EMF of SDFDS motor can be controlled for the constant power control by the flux-weakening in theory as the controllable of flux. But the nonlinear characteristics of SDFDS motor cause the EMF to be anomalous square-wave...
Real-time thermal management of electrical machines relies on sufficiently accurate indicators of temperature within a machine. One indicator of temperature in a permanent-magnet synchronous motor (PMSM) is the stator winding resistance. Detection of PMSM winding resistance in the literature has been made on machines with relatively high resistances, where the resistive voltage vector is significant...
The analysis and performance characteristics for a low speed permanent magnet (PM) brushless transverse flux generator (TFG) have been discussed. This type of generator is a novel machine that can be manufactured in more cost effective way than standard PM brushless generators. The following issues have been emphasized: construction of a TFG, magnetic flux and stator winding EMF, resistance and synchronous...
This paper deals with the noise voltages on the wiring installed on the frame due to ground potential variation. It is concluded that the bigger the size of frame and the ground resistance are, the smaller the noise voltage becomes, and the floating circuits, i.e. the circuits without signal grounding have smaller noise than signal-grounded circuits. To simplify, a sheet of aluminum plate is used...
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