| 摘要 |
<p>PURPOSE:To realize the electrostatic shielding of coils simply and positively by mounting the core of a magnetic substance covering the whole of a bobbin on which a plurality of the coils are wound and winding the coils to which high voltage is applied to form internal layers and winding the coils to which low voltage is applied to form external layers around the bobbin. CONSTITUTION:The primary side coil 4 of a transformer is connected to an input power supply V1 and a transistor 6, and a secondary side coil 5 is connected to a smoothing capacitor 9 through a diode 7 and a chock coil 8. When voltage during the operation of the primary side coil 4 and the secondary side coil 5 in the transformer is compared, the voltage of the primary side coil 4 is higher because input voltage V1>V0 holes. Consequently, the primary side coil 4 is positioned as an internal layer, and the secondary side coil 5 is wound on the coil 4. Since a winding-start end 4A is made higher in voltage during the operation of both ends 4A and 4B of the primary side coil 4, the winding- start end 4A begins to be wound so as to be positioned on the innermost side. Since the negative side of output voltage V0 is grounded normally, on the other hand, the secondary side coil 5 begins to be wound so that a winding-start end 5A is positioned on the inside.</p> |
