| 摘要 |
PURPOSE:To reduce the leakage of magnetic flux and to lighten the device by combining plural coils in the axial direction and by reversing the direction of current in coils adjacent to each other when wires are wound around cylindrical bobbins in a troidal form to obtain an air-core reactor. CONSTITUTION:The wires 4a and 4b are wound around two cylindrical bobbins 3a and 3b of short axes in a troidal form respectively to make up the coils 5a and 5b, these coils 5a, 5b are made adjacent to each other in the axial direction on interposing an insulating plate 6 between both coils, and are fastened with plural insulating studs 8 and supporting metals 7. Next the coils 5a, 5b are connected so that respective current directions may be opposite to each other. In this way, a clockwise line of magnetic force, which is coaxial to the bobbin 3a is developed in one side coil 5a and a loopwise leaked line of magnetic force is also produced, however, a counterclockwise leaked line of magnetic force is developed in the other side coil 5b and both are canceled each other. Accordingly an inductive interference will not be developed in the peripheral device. |
