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Title:
CORE, AND REACTOR, CURRENT LIMITER, ELECTROMAGNETIC ACTUATOR AND MOTOR USING SAID CORE
Document Type and Number:
WIPO Patent Application WO/2018/128149
Kind Code:
A1
Abstract:
[Problem] To provide a core that can be widely applied, e.g., in a reactor, current limiter, electromagnetic actuator, motor, etc. [Solution] The magnetic characteristics of this core 11 are such that, in a first quadrant of a graph with the magnetic field as the first axis and magnetic flux density or magnetization as the second axis, in a first magnetic field region MF1 with an intensity less than or equal to a first magnetic field intensity H1, the differential value of the magnetic flux density or magnetization with respect to the magnetic field is a first value, and in a second magnetic field region MF2 with an intensity greater than the first magnetic field intensity H1, the differential value of the magnetic flux density or magnetization with respect to the magnetic field is a second value greater than the first value. According to the present invention, a smaller magnetization is obtained in the first magnetic field region with the lower magnetic field intensity, and a greater magnetization is obtained in the second magnetic field region with the high magnetic field intensity. For this reason, if the magnetic field intensity changes from the first magnetic field region to the second magnetic field region, since magnetization increases rapidly, the core can be applied to various devices that utilize this phenomenon, such as a reactor, a current limiter, an electromagnetic actuator or a motor.

Inventors:
SATOH Suguru (3-9-1 Shibaur, Minato-ku Tokyo 23, 〒1080023, JP)
MATSUURA Ken (3-9-1 Shibaur, Minato-ku Tokyo 23, 〒1080023, JP)
Application Number:
JP2017/046982
Publication Date:
July 12, 2018
Filing Date:
December 27, 2017
Export Citation:
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Assignee:
TDK CORPORATION (3-9-1, Shibaura Minato-ku Tokyo, 23, 〒1080023, JP)
International Classes:
H01F3/00; H01F7/16; H01F27/24; H01F37/00; H01F38/02; H02H9/02; H02K1/02
Domestic Patent References:
WO1997028545A11997-08-07
Foreign References:
JPS48443B11973-01-09
JPS62170446A1987-07-27
JP2015115088A2015-06-22
US20100194510A12010-08-05
JP2001505277A2001-04-17
Attorney, Agent or Firm:
WASHIZU Mitsuhiro et al. (Daisan-Taiyo Bldg. 7th Floor, 5-1 Ginza 1-Chom, Chuo-Ku Tokyo 61, 〒1040061, JP)
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