Title:
磁気歯車機構
Document Type and Number:
Japanese Patent JP5526281
Kind Code:
B2
Abstract:
The present invention is intended to provide a magnetic gear structure that realizes a magnetic gear that transmits a torque efficiently by reducing eddy currents generated in the interior of magnets. In order to solve the subject described above, in the magnetic gear structure, a structure in which magnets are arranged in the interior of an iron core in an inner rotor portion. Bonded magnets formed by molding, for example, NdFeB powder may be used as the magnets. Since the influence of the eddy current on the side of an outer rotor having a larger pole number is large, a structure in which the magnets are arranged in the interior only of an outer rotor portion having a larger pole number is also applicable. In addition, the magnets to be embedded may be divided into a plurality of pieces. The finer the division of the magnets, the less eddy currents are generated, so that a method of further fining down and assembling the same is also effective. Further reduction of the eddy currents is possible by laminating the plate-shaped magnets having a thickness equivalent to an electromagnetic steel plate in the axial direction.
Inventors:
Yuji Enomoto
Junnosuke Nakatsugawa
Norihisa Iwasaki
Shoji Kitamura
Junnosuke Nakatsugawa
Norihisa Iwasaki
Shoji Kitamura
Application Number:
JP2013500661A
Publication Date:
June 18, 2014
Filing Date:
February 21, 2011
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
F16H49/00
Domestic Patent References:
| JP2009168101A | 2009-07-30 | |||
| JP2007116885A | 2007-05-10 | |||
| JP2001054277A | 2001-02-23 |
Attorney, Agent or Firm:
Manabu Inoue
Yuji Toda
Shigemi Iwasaki
Yuji Toda
Shigemi Iwasaki