The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 15, 2011
Filed:
May. 09, 2006
Yuji Enomoto, Hitachi, JP;
Motoya Ito, Hitachinaka, JP;
Ryoso Masaki, Hitachi, JP;
Koichiro Ohara, Chiba, JP;
Masahiro Mita, Fukaya, JP;
Matahiro Komuro, Hitachi, JP;
Masahiro Masuzawa, Fukaya, JP;
Yuji Enomoto, Hitachi, JP;
Motoya Ito, Hitachinaka, JP;
Ryoso Masaki, Hitachi, JP;
Koichiro Ohara, Chiba, JP;
Masahiro Mita, Fukaya, JP;
Matahiro Komuro, Hitachi, JP;
Masahiro Masuzawa, Fukaya, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Industrial Equipment Systems Co., Ltd., Tokyo, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
It is desired to design a coreless motor in which a gap size is set to be as small as possible, and a magnet having a large energy product is used in order to increase the gap magnetic flux density since the coreless motor has no iron core so that the magnetic flux density is small in the gap part. A rotor core of the motor has a permanent magnet rotor which is formed by a compression molding means, and which is formed of a compact formed by molding a powder material, the compact comprising a bond magnetic portion mainly composed of a binder and a magnetic powder, and a soft magnetic portion mainly composed of a binder and a soft magnetic powder, the bond magnetic portion having magnetic poles having at least one surface which is mechanically bonded to the soft magnetic portion, in order to solve the inherent problems.