Category Archive: 'dip projects for be'

Device for Measuring the Thermal Cycling Degradation in 2G Tapes for Electrical Power Applications

The standard electrical engineering applications of high-temperature superconductors (HTSs) as coils (SMESs), motors, power cables, fault current limiters (SFCLs), etc., usually involve operating conditions under which the critical current of HTS tapes might be degraded. The dependence of such magnitude on mechanical properties, frequency variations, or thermal changes is a key concern for the accurate […]

Parameter estimation of squirrel-cage motors with parasitic torques in the torque–slip curve

This paper studies parasitic torques in steady-state torque-slip curves of squirrel-cage induction motors. The curves of nine motors (small, medium and large size units), three of which were measured in the range s = 2 to 0, are analysed. The torque-slip curves of eight of these nine motors differ significantly from the smooth curves predicted by the […]

Design of Infrared SPR Sensor Based on Bimetallic Nanowire Gratings on Plastic Optical Fiber Surface

In this paper, a bilayer metallic grating with pitch of 1 μm on the flank of a cylindrical plastic optical fiber was proposed as a novel optical sensor. Surface plasmon resonance excited by this structure for refractive index sensing is investigated by finite difference time domain methods. A theoretical sensitivity of 643.75 nm/RIU is obtained, […]

An integrated utility microgrid test site ecosystem optimized by an open interoperable distributed intelligence platform

Microgrid is any subset of a distribution grid that can be islanded from the grid and continue to operate as a distributed energy resource (DER). Recent advances in technology have enabled the creation of microgrid test beds, with distributed generation (DG) and energy storage providing sufficient energy to power the loads within the Microgrids. Duke […]

Passive Wireless Sensor for Force Measurements

The goal of this paper is to investigate fabrication and design of a wireless passive sensor, and its application for measuring normal forces. The proposed force sensor consists of a single coil as an essential part, realized in printed circuit board technology, commercially available elastomer, and ferrite core. Measurements are done wirelessly for variable values […]

Sensing Properties of Long Period Fiber Grating Coated by Silver Film

In long period fiber gratings (LPFGs), the fiber modes guided by the core layer can excite surface plasmon resonance (SPR) in the metallic thin-film coated on the cylindrical surface of fibers. In this letter, the LPFG-based fiber optic SPR sensor is analyzed numerically by unconjugated form of coupled mode method. According to the mode analysis, […]

An Ultra-Sensitive Magnetic Field Sensor Based on Extrinsic Fiber-Optic Fabry–Perot Interferometer and Terfenol-D

We report a fiber-optic magnetic field sensor with ultra-high sensitivity based on a precisely configured extrinsic fiber-optic Fabry-Perot interferometer (EFFPI) and Terfenol-D slab. The EFFPI was simply formed by placing two well-cleaved single-mode fibers with carefully designed spacing and it was bonded to the surface of a Terfenol-D slab by epoxy resin. The experiments demonstrate […]

SFF-8431 12.5Gbps channel return loss (RL) failure debug: Simulation and measurement validation

The process of troubleshooting a 12.5Gbps SFF-8431 channel return loss compliance failure is described in details. Excellent simulation to measurement correlation has been achieved after capturing a capacitive dip at the package/PCB interface (“phantom” capacitance) with package and board physical layout geometries merged into one single electromagnetic simulation. Source of the “phantom” capacitance is identified and explained. […]

New method for effective manipulation of the magnetism in (Ga, Mn)As films by organic molecules

In the case of III-V dilute magnetic semiconductors (DMS), the holes from Mn doping are known to mediate the ferromagnetic interaction among the Mn ions. Through modulation of the hole density, electrostatic gating has been shown to significantly alter the magnetic properties of (III, Mn)V films[1-3]. Here we demonstrate the manipulation of the magnetism of […]

Improved Ride-Through Control of DFIG During Grid Voltage Swell

Grid voltage swell causes a transient dc flux component on doubly fed induction generator (DFIG) stator winding even stronger than grid voltage dip, resulting in a much more serious stator, rotor current, and torque oscillation. This paper analyzes the dynamic behavior of DFIG during grid voltage swell. Based on the analysis results, the virtual resistance control […]