Title:
COUPLING INDUCTOR AND SWITCHING CIRCUIT
Document Type and Number:
Japanese Patent JP2019204945
Kind Code:
A
Abstract:
To provide a compact coupling inductor in which heat evolution in winding due to magnetic flux leakage is less.SOLUTION: A coupling inductor 1 has a core 2, and two windings 31, 32 mutually coupled magnetically. The core 2 is provided with a pair of core bodies 21, 22, and a central core 23 placed therebetween. The core bodies 21, 22 have a central core part 4 inserted into the inner periphery of the windings 31, 32, and an outer shell part 5 extending from the central core part 4 to a region facing the outer boundary of the windings 31, 32. A first magnetic flux path M1 not having an air gap is formed by the central core part 4 of one core body 21, the outer shell part 5 and a central core 23, and a second magnetic flux path M2 not having an air gap is formed by the central core part 4 of the other core body 22, the outer shell part 5 and the central core 23. Initial permeability of the central core 23 is set smaller than those of the core bodies 21, 22.SELECTED DRAWING: Figure 2
Inventors:
KAMBE SHOGO
SHIMAZU EIICHIRO
SHIMAZU EIICHIRO
Application Number:
JP2019059062A
Publication Date:
November 28, 2019
Filing Date:
March 26, 2019
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD
International Classes:
H01F37/00; H01F3/12; H01F27/24; H01F27/255
Attorney, Agent or Firm:
Kunihiko Shiromura
Tsuyoshi Kumano
Tsuyoshi Kumano