Patent ID: 8072305
Filing Date: 2011-12-06
Classification: H01F,H02M

Abstract:
1. A switching supply comprising: an inverter circuit which is connected to a primary coil group of a transformer; and a rectification/smoothing circuit which is connected to a secondary coil group of the transformer, wherein the transformer comprises a core having a first through section and a second through section, which is spatially separate from the first through section and constitutes a magnetic circuit together with the first through section, the first through section passes through the inside of at least one coil of the primary coil group and at least one coil of the secondary coil group, the second through section passes through the inside of the remaining coils of the primary and secondary coil groups, following one loop direction of the magnetic circuit, a first coil group has a primary coil and a secondary coil that are magnetically coupled and, subsequently to the first coil group, a second coil group has a primary coil and a secondary coil that are magnetically coupled, the secondary coil group includes secondary coils, the secondary coils of the secondary coil group being constituted by first and second platelike members, the first platelike member of the secondary coils has first and second openings and first and second slits, the first through section is arranged in the first opening, the second through section is arranged in the second opening, the first slit is continued to the first opening, the second slit is continued to the second opening; the first and second slits extend from the first and second openings in mutually opposite directions, the second platelike member of the secondary coils has third and fourth openings and third and fourth slits, the first through section is arranged in the third opening, the second through section is arranged in the fourth opening, the third slit is continued to the third opening, the fourth slit is continued to the fourth opening, the third and fourth slits extend from the third and fourth openings in mutually opposite directions, and the first and third slits extend from the first and third openings in mutually opposite directions.