| 摘要 |
PURPOSE:To surely erase magnetic field distrotion by flowing current by winding a coil for magnetic field generation while surrounding the object magnetic erasing section in a vehicle to simultaneously generate d.c. and a.c. magnetic fields wherein the external magnetic field is erased by the d.c. magnetic field to leave as a virtual magnetic-free field and residual magnetism is deenergized by the a.c. magnetic field. CONSTITUTION:A coil 1 for magnetic field generation is wound by surrounding the object magnetic erasing section in a vehicle 4 and the end terminals of the coil 1 are connected to a transformer 2A and a d.c. power generator 2B through a d.c. blocking capacitor 3A and an a.c. blocking inductance 3B respectively. Next, a power plug 5 is connected to a commercial power source, 100V a.c. to flow any d.c. current and a.c. current to the transformer 2A and the generator 2B and d.c. and a.c. magnetic fields are generated in superimposed status on the coil 1. In this way, the external magnetic field is erased by the d.c. magnetic field generated by the above method to leave as a virtual magnetic-free field and magnetic field distortion is surely removed by gradually attenuating the a.c. magnetic field. |
