Results 241 to 250 of about 2,554,272 (326)

Stator thermal time constant

49th IEEE/IAS Industrial & Commercial Power Systems Technical Conference, 2013
The thermal model providing motor overload protection is derived from the first order differential equation for heat rise due to current in a conductor. Only the stator thermal time constant and the service factor are the required settings. The thermal model utilizes the full thermal capacity of the motor and allows current swings and cyclic overloads ...
Jon Steinmetz, Subhash C. Patel, Stanley E. Zocholl   +2 more
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Characterization of the Thermal Time Constants of HAMR Media

IEEE Transactions on Magnetics, 2022
Here we describe experimental spin stand measurements as well as simulations of the time constants associated with thermal transients in heat-assisted magnetic recording (HAMR) media.
Ian Gilbert, Chris Rea, Javier Guzman, Jay Loven, Mourad Benakli   +4 more
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Semiconductor-laser thermal time constant

Journal of Applied Physics, 1986
Thermal time constants of semiconductor lasers (‘‘test lasers’’) are measured by transient heating of test laser chips by use of another laser (‘‘pump laser’’). Pump laser emission impinging on the test laser p contact generates local heating. Thus, current-independent thermal responses are studied.
R. D. Esman, D. L. Rode
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Thermal time constant estimation in warming and cooling ectotherms

Journal of Thermal Biology, 2001
(1) Measurement of physiological control of warming and cooling in reptiles requires calculating the thermal time constant (tau) of the animal. (2) Previously reported methods of estimating tau are sensitive to multiple problems including measurement error in operative environmental temperature and equilibrium body temperature, drift of environmental ...
E M., Dzialowski, M P., O'Connor
openaire   +3 more sources

Transient thermal response of enclosures: The integrated thermal time-constant

International Journal of Heat and Mass Transfer, 1965
Abstract A method has been developed for theoretical computation of the integrated thermal time-constant of enclosures, hitherto unknown. The enclosure may consist of any number of different types of composite walls, roof and floor, whether all exposed or some unexposed. It may contain any other internal mass such as furniture.
B. Raychaudhuri
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Measurement of thermal time constant of microbolometer arrays

SPIE Proceedings, 2005
A method is described for the direct measurement of the thermal time constant of microbolometer arrays: The emitted radiation from an array due to time varying Joule heating is monitored by a fast photodetector. Applying a bias voltage pulse to the array the thermal time constant is measured from the time dependence of the emission decay at the end of ...
A. J. Syllaios, Miranda J. Ha, William L. McCardel, Thomas R. Schimert   +3 more
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On the thermal time constant of structural walls

Applied Thermal Engineering, 2004
Abstract In the present investigation a numerical model is employed for the calculation of the transient wall heat flux, under the effect of a step temperature change at a particular wall side, for given initial and boundary conditions. The results were employed for the evaluation of the wall thermal time constant, which is widely employed quantity ...
P. Tsilingiris
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An Experimental Thermal Time-Constant Correlation for Hydraulic Accumulators

Journal of Dynamic Systems, Measurement, and Control, 1990
A thermal time-constant correlation based on experimental data is presented for gas-charged hydraulic accumulators. This correlation, along with the thermal timeconstant model, permits accurate prediction of accumulator thermodynamic losses and the gas pressure and temperature history during compression or expansion.
A. Pourmovahed, D. R. Otis
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Thermal time-constant spectrum extraction method in AlGaN/GaN HEMTs

Journal of Semiconductors, 2015
The transient temperature rise in the active region in AlGaN/GaN high electron mobility transistors (HEMTs) is measured using an electrical method. The original data are smoothed and denoised by a nonparametric fitting algorithm, called locally weighted scatterplot smoothing (LOWESS).
Junwei Yang, Shiwei Feng, Dong Shi, Chunhui Yang   +3 more
openaire   +2 more sources