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Transformer bushing is an important electrical equipment used in power system, it is important for field testing technology of transformer bushing. There are many feature amounts can be used to reflect transformer bushing insulation condition, which including dielectric loss, leakage current, capacitance, insulation resistance, bushing temperature, transformer oil component, SF6 gas components, the...
This paper focuses on packaging and miniaturization of ozone sensors and review aspects of their heterointegration together with other physical sensors for consumer electronics (CE) and internet of things (IoT) applications. We present a concept and simulations of an optically regenerated gas sensor for ozone detection [1]. A demonstrator of innovative stand-alone miniaturized gas sensor according...
A 3-phase high power inverter bridge for a 500 W PEDELEC motor fabricated using a novel embedding technology was benchmarked against a classically designed module using MOSFETs in a B6 Bridge. By operating each MOSFET individually in reverse mode and measuring the forward voltage during high current operation and after switching to a measuring current of 50 mA the junction temperature has been measured...
Electrical transport and thermoelectric properties of thin indium arsenide nanowires have been investigated in the temperature range between 100 K and 365 K. Charge carrier concentration was varied by a back-gate electrode. In nanowires with a diameter of 20 nm, discrete conductance plateaus are observed at low temperature indicating one-dimensional quantization of the density of states. A mean free...
An absolute electrical substitution radiometer is a way to ensure highly accurate and stable measurement of optical power in a wide range of optical wavelengths. Its sensitivity is mainly determined by the temperature stability of the equithermal bath and the electrical noise of the temperature readout. In this article we investigate the noise background of different preamplifiers in combination with...
This paper proposes a solution for relative humidity measurement using data acquisition system NI PCI 6221 and LabVIEW. This solution combines virtual instrument with physical instrumentation and offers a modern alternative to traditional humidity measurement systems: a flexible virtual instrument which eliminates the disadvantages of traditional measuring instruments whose functions cannot be changed...
T-body connector is used in utility distribution system for interconnecting the distribution system cables which carry a high value of electric current. In the past a large number of failures occurred with the bolted T-body connector. The replacement of an existing connector with a new one is an expensive process. The root cause was assumed to be insufficient Installation torque, but it was unknown...
This paper adopts a circuit model with temperature-dependent parameter values to investigate the current unbalance risk in parallel-connected lithium-ion (Li-ion) battery cells and uses this circuit model to calculate heat dissipation. The paper first investigates use of the battery model to explain the impact of temperature on current unbalance in parallel-connected Li-ion battery cells. Experimental...
Lithium-ion batteries are regarded as the key energy storage technology for both e-mobility and stationary renewable energy storage applications. Nevertheless, the Lithium-ion batteries are complex energy storage devices, which are characterized by a complex degradation behavior, which affects both their capacity and internal resistance. This paper investigates, based on extended laboratory calendar...
For gaining an effective cooling performance for motor, water cooling is commonly utilized. But as the requirement for power density increasing, solely the water cooling is not sufficient. This is duo to the thermal resistance of the end winding to the water is large. To obtain lower temperature of the end winding, a new cooling method is studied. The stator and the rotor are separated by an ultrathin...
This paper presents a concept of a micro thermal sensor to be used for defect inspection of a smoothly-finished surface such as a bare wafer or a hard disk. In the proposed concept, existences of the defects on a measurement surface will be detected by scanning the surface with the micro thermal sensor, which is utilized to detect the variation of the thermal flow in-between the sensor surface and...
Four different N-well Hall Plate geometries were designed and fabricated in a 0.5μm CMOS process provided by MOSIS. Different shapes, sizes, contact distribution and dimensions were used in order to characterize Hall Plate sensitivity and resistance in a range of temperatures from −40°C up to 165°C. To remove the offset a four-phase current spinning method was used. The results show a better sensitivity...
Thermal properties of building envelope is a fundamental key to building energy design or in evaluating the energy performance of an existing building. In-situ measurements are often constrained by the low-temperature difference between the indoor and outdoor side of a building, thus requiring a longer measurement time and a higher cost. This paper attempts to overcome these obstacles by measuring...
This paper analyzes two novel methods of torque ripple testing and efficiency evaluation for three-phase induction motor. A high-precision torque sensor and a digital filter are used to observe torque ripple and measure torque value of the induction motor. By using indirect efficiency measurement, temperature influences on the resistance are taken into account and the torque on the shaft could be...
We studied power dissipation in 1L MoS2 devices using Raman thermometry for the first time. We uncovered non-uniformities of power dissipation and the important role of the MoS2-substrate interface thermal resistance. These results provide critical insights for thermal design of devices based on 2D materials. This work was supported by the AFOSR, NSF EFRI 2-DARE, and Stanford SystemX.
This study focuses on physical modelling of turbulent vertical buoyant jets, discharged into a transversal current and interacting with localized background turbulence. The physical model was developed in the Coastal Engineering Laboratory of the Technical University of Bari. The physical model consists of a sophisticated system that allows to monitor and adjust all the characteristic parameters of...
Phase change memory (PCM) is a high-speed, scalable, resistive non-volatile memory technology that utilizes melting followed by rapid resolidification and annealing above glass-transition temperature to switch a small volume of phase change material to reversibly switch between conductive crystalline and resistive amorphous phases. PCM offers the potential to fill the gap between dynamic random access...
We are researching Ga-Sn-O (GTO) thin film as a potential material for future semiconductor devices. In this study, we investigate the GTO thin film using Hall measurement. A GTO film is deposited using RF magnetron sputtering, and annealed using electric-furnace annealing in air at temperature of 350 °C. We utilize van der Pauw method of the Hall measurement with slight modification, where the Hall...
The description of the precision temperature measurement unit for measuring temperature of the investigated samples in the low-temperature dielectrometer in the range of 0.3 − 300 K with an accuracy of 0.05 K is given. Four-wire measurement circuit on an alternating current with use of the semiconductor temperature sensor (semiconductor film resistance thermometer) in the whole temperature range is...
A controllable and selective process for doping is essential for current CMOS technology, and with the advent of FinFETs, necessity for conformal doping has become inevitable. In this work, we demonstrate formation of novel phosphorus porphyrin self-assembled monolayers(SAMs) on silicon substrate to dope silicon with phosphorus (n-type doping). Detailed physical characterization of SAMs formed on...
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