TITLE:
The Motional EMF in Conductors with Ferromagnetic Shield
AUTHORS:
Alexander I. Korolev
KEYWORDS:
Motional EMF, Magnetic Shielding, Electromagnetic Induction
JOURNAL NAME:
Open Access Library Journal,
Vol.5 No.3,
March
27,
2018
ABSTRACT: The motional EMF in segments of the copper wire with magnetic shielding is found according to the voltage lack in two coils with partial shielding moving relative to the magnetic field lines. The first coil moved across the Earth’s magnetic field lines. The second one was located near the end face of the rotating disk magnet with an axial magnetization. Permalloy foil wound around a part of turns containing wire was used for shielding. The experiments result reveals the penetrating ability of the magnetic field through the ferromagnetic shield and shows the physical nature of the superposition principle. With this in mind, a universal method for calculating EMF induced in a conductive body has been provided as well as the concepts of magnetic field lines velocity and acceleration have been introduced.