Title:
密閉型電動圧縮機
Document Type and Number:
Japanese Patent JP5823928
Kind Code:
B2
Abstract:
To improve holding power of an Nd-Fe-B based sintered magnet while ensuring a magnetic force of a motor. A sealed motor-driven compressor comprises a compression mechanism section for compressing a refrigerant, and a motor for driving the compression mechanism section. The motor comprises a stator including a coil, and a rotor including an iron core and a permanent magnet. The permanent magnet is composed of an Nd-Fe-B compound to which a middle-heavy rare earth element has been added, and the refrigerant is R32. The quantity of the middle-heavy rare earth element per unit volume in 5 nm from a grain field of a matrix grain of the Nd-Fe-B compound is more than the quantity of the middle-heavy rare earth element per unit volume inner than 5 nm from the grain field of the matrix grain.
Inventors:
Akira Murakami
Shigeru Kawanami
Ryoko Takano
Atsushi Shimada
Shigeru Kawanami
Ryoko Takano
Atsushi Shimada
Application Number:
JP2012144911A
Publication Date:
November 25, 2015
Filing Date:
June 28, 2012
Export Citation:
Assignee:
Hitachi Appliances, Inc.
International Classes:
H02K1/27; F04B39/00; F04C29/00; H02K15/03
Domestic Patent References:
| JP2001115963A | ||||
| JP2011211069A | ||||
| JP2009038930A |
Attorney, Agent or Firm:
Isono International Patent and Trademark Office