| 摘要 |
PURPOSE:To remarkably reduce sizes of primary coil and secondary coil by forming spiral coil conductor at the surface of a thin insulated substrate, arranging in parallel a plurality of prints and by forming the primary coil and secondary coil through series connection of these coil conductors. CONSTITUTION:A plurality of print boards 10, each of which allows formation of spiral coil conductor 12 at the surface of thin insulated substrate 11, are arranged in parallel and the primary coil and secondary coil are formed by connecting in series these coil conductors 12. When a current is applied to the primary coil 1, magnetic flux 4 is generated, an induced electromotive force is generated on the secondary coil 2 when the secondary coil 2 crosses such magnetic flux 4, resulting in the transformation effect. Moreover, the primary coil 1 and the secondary coil 2 are formed by combining the print boards 10a, 10b consisting of the insulated substrate 11 having a hole 11a at the center thereof and an internal iron type iron core 3a is inserted into such hole, an induced power of the secondary coil increases. |
