Patent ID: 9697949
Date: 2017-07-04
CPC Classifications: H01F,H02M

Claim:
1. A transformer comprising: first coil unit and second unit, wherein one or more coils are wound on the bobbin of insulating material in at least one of the first coil unit and the second unit, and wherein the bobbin is formed with at least one partitioning flange for partitioning a coil winding surface of the bobbin into two winding surfaces along the longitudinal direction of the bobbin, wherein the bobbin is formed with at least one first partitioning flange formed with an opening around the winding surface through which a coil is inserted in the longitudinal direction of the bobbin, and at least two second partitioning flanges not having any opening through which a coil is inserted in the longitudinal direction of the bobbin, the first partitioning flange and the second partitioning flange being arranged in alternating order, wherein the bobbin is formed with at least one first winding surface and at least one second winding surface that is partitioned by the at least one first partitioning flange with the opening and adjacent partitioning flanges of the at least two second partitioning flanges not having any opening, wherein the coil includes at least one subcoil which is inserted through the opening of the first partitioning flange, both sides of the subcoil inserted in the opening of the first partitioning flange are respectively wound in at least one layer on the first winding surface and the second winding surface divided by the first partitioning flange, and the both ends of the at least one subcoil are respectively positioned over adjacent second partitioning flanges and electrically connected with the adjacent subcoils over the second partitioning flanges.