scholarly journals Energy Transfer from Electromagnetic Fields to Materials

2019 ◽  
Author(s):  
Graham Brodie
Keyword(s):  
Energy Transfer ◽  
Electromagnetic Fields

A Small Scale Wireless Power Transfer

2015 ◽  
Vol 793 ◽  
pp. 541-545
Author(s):  
M. Fareq ◽  
M. Fitra ◽  
Muhamad Irwanto ◽  
Syafruddin ◽  
Hs.N. Gomesh ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Electromagnetic Fields ◽  
Small Scale ◽  
Receiver Side ◽  
Wireless Power ◽  
Rf Power ◽  
Lower Efficiency ◽  
Function Generator ◽  
Rf Power Amplifier ◽  
And Function

This paper describes a small scale energy transfer by using magnetic coil made ​​with enamel coil, which is installed on the transceiver side and function generator and RF power amplifier are installed as source to generated signal, and on the receiving side is using an enamel coil materials as antenna. In this experiment obtained energy as it travels from the transceiver can be received at the receiver side without any media or cable, the principle of electromagnetic fields used in this experiment. Number of coil inductive coupling has been compare. Number of turn 4, efficiency 91 % at 0 cm with 4.55 volt and the lower efficiency 70% at 5 cm with 3.1 volt. And number of turn 8, efficiency 97.8% at 0 cm with 4.89 volt and the lower efficiency 70% at 5 cm with 3.50 volt

Current and Magnetic Field of a Simplex Wave Winding in a DC Generator

2020 ◽  
Vol 15 (1) ◽  
pp. 71-81
Author(s):  
Jun Chen
Keyword(s):  
Magnetic Field ◽  
Energy Transfer ◽  
Motor Control ◽  
Fundamental Frequency ◽  
Electromagnetic Fields ◽  
Characteristic Frequency ◽  
Induction Coil

The DC generator is widely used in the fields of industry motor control and energy transfer, and the simplex wave winding (SWW) is the main winding pattern of the DC generator. In this paper, a brief introduction to the structure of the SWW is presented first. Then the characteristics of the current and electromagnetic fields of the SWW are analyzed particularly in a commutation cycle and two typical concepts of the “central slot” (CS) and the “widest magnetic peak area” (WMPA) are proposed respectively. The characteristic frequency which is 63 and 21 times higher than the fundamental frequency (FF) of the voltage between two brushes is obtained and verified from 6 conditions of different speeds and currents. Furthermore, with the help of an induction coil sensor between two main poles, the characteristic frequency 84 times higher than the FF of the WMPA is also verified in 6 conditions and the results coincides with the theory well.

scholarly journals Theory for polariton-assisted remote energy transfer

2018 ◽  
Vol 9 (32) ◽  
pp. 6659-6669 ◽  
Author(s):  
Matthew Du ◽  
Luis A. Martínez-Martínez ◽  
Raphael F. Ribeiro ◽  
Zixuan Hu ◽  
Vinod M. Menon ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Long Range ◽  
Electromagnetic Fields ◽  
Strongly Coupled ◽  
Comprehensive Theory

A comprehensive theory is presented to mechanistically elucidate the long-range energy transfer between molecules strongly coupled to electromagnetic fields.

A quantitative approach to inner shell losses

1978 ◽  
Vol 36 (1) ◽  
pp. 526-527 ◽  
Author(s):  
R.D. Leapman ◽  
P. Rez ◽  
D.F. Mayers
Keyword(s):  
Energy Transfer ◽  
Cross Section ◽  
Cross Sections ◽  
Accurate Determination ◽  
Background Intensity ◽  
Core Excitation ◽  
Quantitative Basis ◽  
Cross Section Differential ◽  
Bound Electrons

Microanalysis by EELS has been developing rapidly and though the general form of the spectrum is now understood there is a need to put the technique on a more quantitative basis (1,2). Certain aspects important for microanalysis include: (i) accurate determination of the partial cross sections, σx(α,ΔE) for core excitation when scattering lies inside collection angle a and energy range ΔE above the edge, (ii) behavior of the background intensity due to excitation of less strongly bound electrons, necessary for extrapolation beneath the signal of interest, (iii) departures from the simple hydrogenic K-edge seen in L and M losses, effecting σx and complicating microanalysis. Such problems might be approached empirically but here we describe how computation can elucidate the spectrum shape.The inelastic cross section differential with respect to energy transfer E and momentum transfer q for electrons of energy E0 and velocity v can be written as

Sign in / Sign up

Export Citation Format

Share Document