| 摘要 |
PROBLEM TO BE SOLVED: To make compatible both high insulation and high heat radiation by interposing a liquid magnetic body having conduction and convection of heat, high insulation property and high permeability between an injected and molded body and a magnetic particle body, housing them in a case and sealing the upper part thereof. SOLUTION: A power supply transformer body 10 is placed to a case 20 molded of synthetic resin constituting the exterior, and a magnetic particle body 30 made by sintering Ni-Zn based ferrite is filled as to cover the transformer body 10 thoroughly. Then a liquid magnetic body 31 having insulation property to be immegatalle is evacuatedly in preguated to be molded, and a hard epoxy resin as a sealing body 32 is injected into the upper part and molded/cured thereafter. A core 11, coil bobbin 12 and coil 13 are made by casting. In addition, a conductive shield plate is wound around the uppermost exterior of the respective coil 13, and the transformer body 10 in which the same shield plate is provided between the coils is placed to the case 20. |
