Results 201 to 210 of about 708,578 (251)

Temperature Distribution in High Frequency Heated Dielectrics

Journal of Microwave Power and Electromagnetic Energy, 1987
The dielectric heating of slabs of homogeneous material, by means of two parallel plate electrodes or taggered rod electrodes, is investigated. The text discusses the application of the finite elements method in a two dimensional system for the calculation of potential and power distribution, and of transient temperature distribution during the ...
Van D.M Dommelen, P.F. Stefens
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High Frequency Electrotherapy for Tissue Heating Optimization

Journal of Switching Hub, 2022
We have created an electrotherapy system that will optimize the properties of tissue heating using a natural philosophy circuit that creates a high voltage at a frequency of 0.3–a pair of MHz. Applications in medicine uses these qualities. In order to improve tissue heating, a high voltage pulse signal with a peak voltage of almost 2 kV is used in this
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High Frequency Inverter for Induction Heating

IETE Journal of Research, 1974
A bridge inverter with series-parallel compensated load is analysed. The analysis is simplified in order to evaluate easily the effect of circuit parameters on the inverter operation. The necessary conditions for the proper operation of the SCRs are derived and discussed.
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High Frequency and Microwave Heating

2016
This chapter presents the industrial applications of high frequency and microwave heating, which are based on the thermal effect produced in a dielectric material exposed to a high frequency alternating electrical field. Since dielectric materials are characterized by low electrical and thermal conductivity, dielectric heating has found wide acceptance
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Bus bar design for high-frequency induction heating

Transactions of the American Institute of Electrical Engineers, Part II: Applications and Industry, 1952
WHERE motor-generator sets are used, induction heating coils are frequently located at points remote from the high-frequency generator in a manufacturing plant. In such cases, one or more transmission lines are required. These may be either of the cable or rectangular bus bar type. A subsequent paper will consider the use of cables.
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Ionospheric modifications in high frequency heating experiments

Physics of Plasmas, 2015
Featured observations in high-frequency (HF) heating experiments conducted at Arecibo, EISCAT, and high frequency active auroral research program are discussed. These phenomena appearing in the F region of the ionosphere include high-frequency heater enhanced plasma lines, airglow enhancement, energetic electron flux, artificial ionization layers ...
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High-frequency heating of conductors and nonconductors

Electrical Engineering, 1945
TO heat electric conductors made of metals — iron, brass, aluminum, and so forth — the piece to be heated is surrounded by a coil carrying the high-frequency alternating current. This coil induces the heating currents in the work, and the process is called induction heating.
R. M. Baker, C. J. Madsen
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Ionospheric heating with oblique high‐frequency waves

Journal of Geophysical Research: Space Physics, 1990
This paper presents calculations of ionospheric electron temperature and density perturbations and ground‐level signal changes produced by intense oblique high‐frequency (HF) radio waves. Our analysis takes into account focusing at caustics, the consequent Joule heating of the surrounding plasma, heat conduction, diffusion, and recombination processes,
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CRYOCOOLED WINDOWS FOR HIGH FREQUENCY PLASMA HEATING

1993
One of the ways of plasma heating in nuclear fusion reactors consists in micro-wave feed from gyrotrons. Reliable windows have to be developed to separate the ultra-high vacuum of the gyrotron and the plasma space, resp., from the waveguides. Transmission powers on the order of 1 MW in permanent operation are the present goal of development work.
Haefner, H. E., Bojarsky, E., Norajitra, P., Reiser, H.   +3 more
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The High-Frequency Heating of Nonconducting Materials

Journal of Fluids Engineering, 1947
Abstract High-frequency dielectric heating provides a unique method of heating certain materials with results which are unattainable with conventional means. The limitations of former methods and the advantages of high-frequency heating are discussed, and the theoretical basis and the practical limitations of the latter method are ...
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