Results 221 to 230 of about 47,975 (255)

Minimizing Hot Spot Temperature in Asymmetric Gradient Coil Design

IEEE Transactions on Biomedical Engineering, 2011
Heating caused by gradient coils is a considerable concern in the operation of magnetic resonance imaging (MRI) scanners. Hot spots can occur in regions where the gradient coil windings are closely spaced. These problem areas are particularly common in the design of gradient coils with asymmetrically located target regions.
Peter T. While, Larry K. Forbes, Stuart Crozier   +2 more
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Simulation models of transformer hot-spot temperature

2012 IEEE 10th International Conference on the Properties and Applications of Dielectric Materials, 2012
The winding hot-spot temperature is an important parameter that determines the transformer overloading capability and the aging rate of the oil paper insulation. In this paper, three simulation models based on modified IEEE model, Swift model, and Susa model are established in Matlab/Simulink.
null Huang Xiaofeng, null Zhou Lijun, null Wu Guangning, null Du Qingquan   +3 more
openaire   +1 more source

The influence of liquid temperature on the sonoluminescence hot spot

The Journal of the Acoustical Society of America, 1998
An explanation is provided for the influence of relatively small changes in liquid temperature on the hot spot within a sonoluminescence bubble. This influence derives from a change in the (stable) equilibrium mass of the bubble due to a variation of the gas solubility in the liquid with temperature.
Vi Q. Vuong, Marios M. Fyrillas, Andrew J. Szeri   +2 more
openaire   +1 more source

Error Analysis of Transformer Hot Spot Temperature Measurement

Distributed Generation & Alternative Energy Journal, 2021
According to the national standard GB/T 1094.7-2008, the method of hotspot measurement of oil-immersed transformer is used to place several tem-perature sensors inside the gasket within the predicted hot spot position tomeasure the temperature of winding transformer. The highest temperaturemeasured is regarded as the hot spot temperature of transformer.
Zhengang Zhao, Zhengyu Yang, Yuyuan Wang, Ke Liang, Nengsi Jin, Kaiqiang Shi, Chuan Li, Yingna Li   +7 more
openaire   +1 more source

Calculation of Core Hot-Spot Temperature in Power and Distribution Transformers

IEEE Power Engineering Review, 2002
Summary form only given, as follows. Accurate calculation of the value of the core hot-spot temperature at the design stage is becoming very critical in order to ensure that hydrogen generation that can be caused by oil-film degradation at core hot-spot temperatures as low as 110-120/spl deg/C is limited. Presented are two calculation methods developed
E.G. teNyenhuis, R.S. Girgis, G.F. Mechler, null Gang Zhou   +3 more
openaire   +1 more source

Transformer windings hot spot temperature modeling and simulation

2014 IEEE 27th Canadian Conference on Electrical and Computer Engineering (CCECE), 2014
This paper presents simplified simulation models to determine the winding hot spot temperature of a transformer. The models use measured oil temperature(s), load current and transformer winding data as inputs. The simulated winding hot spot temperature showed good agreement with the temperature measured on 250 MVA transformer equipped with fiber optic ...
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Shutdown Versus Hot-Spot Temperatures in Polyphase Induction Motors

Transactions of the American Institute of Electrical Engineers, 1946
THE “Test Code for Polyphase Induction Machines,” AIEE Standard 500, paragraphs 50 to 58 inclusive, contains complete instructions for making temperature tests and reads in part as follows:
C. P. Potter, A. E. Frohardt
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Temperature relaxation in hot spots in a laser-produced plasma

Physical Review E, 1998
P.N. Lebedev Physics Institute, Russian Academy of Sciences, Moscow 117924, Russia~Received 31 July 1997!The study of temperature relaxation and ion acoustic wave excitation in localized regions of intense laserfield~hot spots! has been carried out for the conditions of inhibited electron thermal transport.
V. K. Senecha, A. V. Brantov, V. Yu. Bychenkov, V. T. Tikhonchuk   +3 more
openaire   +1 more source

Performance of Transient Temperature in Hot Spot Ignition

Applied Mechanics and Materials, 2014
This work presents a method to estimate probability initiating combustion and detonation by temperature load in void in energetic material. When a void is compressed its volume decreases and the temperature in the void increases. The local thermal source due to the void deformation in energetic material forms a temperature load which may initiate ...
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Neural network-based control of hot-spot temperature

IEEE International Symposium on Industrial Electronics. Proceedings. ISIE'98 (Cat. No.98TH8357), 2002
The control of chemical processes has demanded control engineers to come up with controllers that can cope with nonminimum-phase systems, nonlinear systems, and systems with large, variable or unknown dead times and other variable process parameters.
N. Mazana, B. Nleya
openaire   +1 more source