Transformer

Patent metadata

Field	Value
Publication number	US-10535461-B2
Application number	US-201715808396-A
Country	US
Kind code	B2
Filing date	Nov 9, 2017
Priority date	Nov 22, 2016
Publication date	Jan 14, 2020
Grant date	Jan 14, 2020

Abstract

A transformer includes: a first coil section formed by coiling a conductor pattern in a planar state around an insertion hole provided on a circuit board; a second coil section that includes a first ring composed of a coil formed by coiling a conductor plate, the coil being covered with an electric-insulating resin, a second ring composed of a coil formed by coiling a conductor plate, the coil covered with the electric-insulating resin, and a coupled part formed by covering a coupled position between the first ring and the second ring with the electric-insulating resin; and core sections forming a closed magnetic circuit that magnetically couples the first coil section and the second coil section.

First claim

What is claimed is:

1. A transformer comprising:
a first coil section formed by coiling a conductor pattern by one round or more in a planar state around an insertion hole provided on a circuit board;
a second coil section that includes
a first ring composed of a coil formed by coiling a conductor plate by one round or more, the coil being covered with an electric-insulating resin, the first ring being annular and being arranged on a first surface of the circuit board such that a through-hole of the first ring coincides with an insertion hole of the first coil section,
a second ring composed of a coil formed by coiling a conductor plate by one round or more, the coil being covered with the electric-insulating resin, the second ring being annular and being arranged on a second surface of the circuit board such that a through-hole of the second ring coincides with the insertion hole of the first coil section, and
a coupled part formed by covering a coupled position between the first ring and the second ring with the electric-insulating resin, the coupled position electrically coupling the respective coils between the first ring and the second ring; and

core sections inserted through the insertion hole, the first coil section, and the second coil section, the core sections holding the circuit board from both sides of the circuit board so as to form a closed magnetic circuit that magnetically couples the first coil section and the second coil section, wherein
the circuit board includes a slit, the coupled part being inserted and fitted into the slit so as to position the first coil section and the second coil section such that the insertion hole of the first coil section coincides with a through-hole of the second coil section.

2. The transformer according to claim 1 , wherein
the conductor plate is a rectangular copper wire.

3. The transformer according to claim 1 , wherein
a gap exists between the first ring and the second ring, and
the circuit board is disposed in the gap.

Assignees

• Toyota Motor Co Ltd

Inventors

• Oguchi Masahiro
• Matsuoka Yoshiharu
• Muto Jun

Classifications

• H01F2027/2861

  Coil formed by folding a blank · CPC title

• H01F27/2847

  Sheets; Strips (H01F27/2866 takes precedence) · CPC title

• H01F27/327

  Encapsulating or impregnating (encapsulating coil and core H01F27/022) · CPC title

• H01F2027/2819

  Planar transformers with printed windings, e.g. surrounded by two cores and to be mounted on printed circuit · CPC title

• H01F2027/2809

  on stacked layers · CPC title