| 摘要 |
PURPOSE:To reduce leakage inductance by a method wherein a primary and a secondary windings are composed of flat strip conductors and winding start and winding end of respective windings are formed on the same sides of the winding part and the distance between the primary and the secondary windings and the distances between onward circuits and return circuits of the respective windings are selected to be small enough as compared to the diameter of the inside winding. CONSTITUTION:A tape shape flat strip conductor 13 which composes a primary winding 11 is wound downward from a winding start terminal 11a provided to the top of the primary winding 11 flatly (i.e. a longer side of the rectangular cross section of the flat strip conductor 13 is parallel to an axis) to form an onward circuit. After reaching the bottom, the flat strip conductor 13 is wound upward in the same winding direction as the onward winding from the bottom to a winding end 11b which is provided to the top facing the winding start terminal 11a with the minimum interval to form a return circuit. The distance between the onward circuit and the return circuit is minimized. A secondary winding 12 is composed of a flat strip conductor 13 in the same way and inserted tightly into the primary winding 11. At that time, distance DELTAd between two windings 11, 12 is selected to be far smaller than the diameter (d) of the secondary winding 12. |
