| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To attain miniaturization and reduce external magnetic flux leakage by setting a coupling coefficient between winding coils at a suitable value. <P>SOLUTION: This loosely-coupled transformer comprises an E-shaped ferrite core 10 having a central leg 11, side legs 12 and a plate-like member 13; an E-shaped ferrite core 20 having a central leg, side legs 22 and a plate-like member 23 linking the central leg and the side legs 22; a nearly square-shaped ferrite core 30 disposed between the side legs 12 and the side legs 22; a primary winding 40 provided inside the side legs 12 and around the central leg 11; and a secondary winding 50 provided inside the side legs 22 and around the central leg. A first magnetic gap is defined between the central legs, and a second magnetic gap is formed between the side surfaces of the central legs and the inner surface of the nearly square-shaped ferrite core 30. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
