TRANSFORMER AND POWER SUPPLY APPARATUS USING THE SAME

摘要

A transformer is provided with a first bobbin (15), which has a first primary winding (12) and a first secondary winding (13) wound thereon and a first through hole (14); a second bobbin (19), which has a second primary winding (16) and a second secondary winding (17) wound thereon and a second through hole (18); and two divided magnetic cores (26). Each magnetic core is composed of a middle magnetic leg (23), a first outer magnetic leg (24) and a second outer magnetic leg (25). The middle magnetic leg is composed of a vertical wall section (21) and a side wall section (22), which are vertically connected from a rear magnetic plate (20), and has a T-shaped cross-section. The first outer magnetic leg is arranged on one side partitioned by the vertical wall section (21) and a second outer magnetic leg is arranged on the other side. The first outer magnetic legs (24) are made to abut to each other by being inserted through the both sides of the first through hole (14), respectively, the second outer magnetic legs (25) are made to abut to each other by being inserted through the both sides of the second through hole (18), respectively, and the middle magnetic legs (23) are also made to abut to each other.