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Articles 1 - 3 of 3
Full-Text Articles in Physics
Physical Models Of The Toroidal Dipole, Armian Hanelli, Amanuel Eshete, Walerian Majewski
Physical Models Of The Toroidal Dipole, Armian Hanelli, Amanuel Eshete, Walerian Majewski
Exigence
We have investigated two models of the third elementary electromagnetic dipole, known as the toroidal dipole. Its magnetic realization is a circumferentially magnetized ring constructed of neodymium. The electric model of the dipole is a toroidal coil connected to a DC voltage. The electric and magnetic toroids produce only an inner magnetic field, inside the torus, and interact only on contact with the electric current density or when immersed in a time-dependent electric field. We studied the characteristics of a permanent-magnet toroid, and observed the influence of electric and magnetic fields on it. A static toroidal dipole moment of this …
Laboratory Model Of Magnetic Frictionless Flywheel And Hoverboard, Angel J. Gutarra-Leon, Vincent Cordrey, Walerian Majewski
Laboratory Model Of Magnetic Frictionless Flywheel And Hoverboard, Angel J. Gutarra-Leon, Vincent Cordrey, Walerian Majewski
Exigence
We constructed a ring Halbach array of strong NdBeB grade 52 arc-segment magnets, with magnetizations chosen to create a one-sided magnet with the field magnified on the flat side. We investigated a repulsive axial levitating forces and associated circumferential drag forces acting on an assembly of inductors suspended above the rotating array. After measuring induced currents, voltages and magnetic fields in the individual inductors (in the form of short solenoids) of our induction wheels, we investigated the dependence of lift/drag forces on the speed of relative rotation of magnets and inductors. The ratio of lift to drag increases uniformly with …
Low-Density Self-Driven Electromagnetic Wheel: Comparison Of Different Tracks, Nathan Gr Gaul, Walerian Majewski
Low-Density Self-Driven Electromagnetic Wheel: Comparison Of Different Tracks, Nathan Gr Gaul, Walerian Majewski
Exigence
The rotation of a permanent magnetic multipole wheel near a conducting non-magnetic plate creates a time-varying magnetic field that can produce by induction both repulsive levitation and propulsion forces. We constructed such an electrodynamic wheel using a motorized bicycle wheel with a radius of 12 inches and 36 one-inch cube Nd magnets attached to the rim of the wheel. The radial magnetic field on the outer rim of the wheel was maximized by arranging the magnets into a series of Halbach arrays which amplify the field along the rim. When a conductive metal “track” is immersed in this area of …