Combination Of Magnetic Forces Research Articles

Stabilization of non-controlled magnetic levitation motor utilizing the diamagnetic magnetic force of PG disk and rotating torque measurement

It can be widely applied if it can stably levitate and rotate the floating rotor without using automatic control or superconducting material. The diamagnetic magnetic force generated by diamagnetic substances is very small. The author found that a heavy floating rotor can be levitated by a combination of magnetic force between floating rotor magnet and radially arranged permanent magnets, and diamagnetic magnetic force between fixed magnet group and PG disk. In this paper, I will explain how to levitate the floating rotor. In addition, I show the calculation method necessary for levitation analysis and describe the usefulness of surface current method used for analysis.

Commercial piezoelectric unimorph diaphragm as a magnetic energy harvester

A magnetoelectric coupling in a low-cost and commercially available piezoelectric unimorph diaphragm is demonstrated by measuring magnetically induced AC voltage from the sample. Such a magnetoelectric effect could be achieved only because of the combination of magnetic forces within the electrodes and piezoelectric effect, without any magnetic constituent. Harvested magnetic power density across an optimal resistive load is found to be 0.12 mW/Oe.cm 3 at the bending mode resonance frequency. The proposed transduction mechanism opens new and simple ways for producing electricity from stray magnetic fields.

Magnetic Compensation of Gravity and Centrifugal Forces

This paper deals with the theoretical combination of magnetic forces, centrifugal forces, and gravity acting on low-χ magnetic fluids contained within a cylindrical shaped zone with a horizontal axis. The magnetic field is created by a combination of both quadrupolar winding and dipolar fields, as exists in superconducting coils developed for particle accelerators. Such a ground based device, if static, simulates a rotation – in space conditions – of a paramagnetic substance such as liquid oxygen. When the cylinder rotates, it creates exact gravity compensation – on Earth – for diamagnetic fluids such as hydrogen. These results go beyond a previous result that found it impossible to reach perfect magnetic compensation of gravity in a 3D domain.