| 摘要 |
PROBLEM TO BE SOLVED: To provide a step-up transformer which can be made compact and lightweight as a whole while reducing the cost, by making a ferrite core compact and lightweight, and decreasing the number of turns of primary winding and secondary winding.SOLUTION: Ends 242c, 542c of ferrite cores 242, 542 are placed in the center hole of a bobbin shaped insulation member 252, and the tips of the ends 242c, 542c are connected with each other by a conductive adhesive 71. There is no gap in the central part 62 of the ferrite cores 242, 542 located in the center hole. The primary winding 20 and secondary winding 21 have winding widths W1, W2 smaller than the stacking thicknesses T1, T2 thereof, and have a flat winding shape. |
