The high magnetic coupling passive loop: A steady-state and transient analysis of the thermal behavior

This paper deals with a new concept of technology for the mitigation of the magnetic field produced by underground power lines called "High Magnetic Coupling Passive Loop" (HMCPL). The working principle of this technique is the creation of a current with the same amplitude but opposite phase for each source conductor, in order to nullify the magnetic field in a specified region. Since the number of thermal sources in the shielding region is roughy doubled, the aim of the paper is the investigation of the thermal behavior of HMCPL directly buried in the ground, both in transient and in steady-state conditions. The study is carried out with simulations in order to verify any possible configurations of the shield. Results confirm that HMCPL is a safe technology which does not modify the thermal behavior of the power lin

A Second-Order Cell Method for Poisson's Equation

The Cell Method, similar to the Finite Integration Technique, is a well-established numerical method for the solution of field problems, however an often raised criticism is that it is limited to constant fields within elements. In this paper we show that for the case of Poisson’s equation the Cell Method can be extended to the second order convergence. Numerical results showing the order of convergence of the method are presented

Dual-PEEC Modeling of a Two-Port TEM Cell for VHF Applications

Two-port TEM cells with rectangular cross section are commonly used to produce plane electromagnetic waves with high electric field. The non-uniform structure makes the use of numerical methods extremely useful in the design phase in order to achieve a very good behavior of the TEM cell over a wide frequency range of operation. In this paper an extended version of PEEC is used to study a real device and results are compared with experimental ones

Capacitor for resonant circuits in power applications

A capacitive element is manufactured by using the multilayer printed circuit board technology . The body of the element includes a layer of dielectric material interposed between two layers of conductive material arranged on opposite sides of the layer of dielectric material . Each layer of conductive material is in turn covered , on its free side , with an external covering layer . The material for making the layer of dielectric material is chosen among materials having : a dielectric permeability epsilon_r > 1 , a dielectric rigidity k > 100 kV / mm , and a loss figure Df<=0.002 . Furthermore , the dimensions of the layer of dielectric material are greater than the dimensions of the layers of conductive material , so as to limit the edge effects that might cause discharge phenomena and make the capacitive element flexible

Inductive power transfer for automotive applications: State-of-the-art and future trends

The paper discusses the status of the development status of the inductive power transmission for automotive applications. This technology is, in fact, gaining the interest of electric vehicle manufacturers as an effective strategy to improve the market penetration of electric mobility. Starting from the origin of this technology, the paper presents an overview of the current state-of-the-art as well as the current research and industrial projects. Particular attention is devoted to the description of a prototypal system for the dynamic inductive power transmission whose goal is to extend the battery range by a fast partial recharging during the movement of the vehicle

A Source Identification Problem for the Electrical Activity of Brain During Hand Movement

A field source reconstruction of the dipoles modeling the activated area of the brain, while a subject performs the task of the voluntary motion of the hand, is solved. Experimental data resulting from fMRI are used for constraining the position of the equivalent dipole