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:
May. 08, 2001
Filed:
Mar. 25, 1998
Takashi Ishigami, Fujisawa, JP;
Yukinori Taneda, Yokohama, JP;
Toshihiko Sakai, Yokohama, JP;
Hiromichi Hiramatsu, Yokohama, JP;
Noriaki Yamamoto, Yokohama, JP;
Yuji Enomoto, Yokohama, JP;
Motoya Ito, Hitachinaka, JP;
Fumio Tajima, Ibaraki-ken, JP;
Suetaro Shibukawa, Hitachinaka, JP;
Masaharu Senoh, Narashino, JP;
Osamu Koizumi, Ibaraki-ken, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A motor having a lap winding structure and a manufacturing method therefor, wherein inserts of two different coils are installed side by side in one slot of a stator in a circumferential direction of the stator. All the coils are inserted in slots in succession. Further, a stator having semi-closed type slots formed by protuberances oriented in different directions, is used to control a reduction in the magnetic flux at the inlet of a slot and also to prevent coils from coming off. In a motor having coils of a plurality of phases for generating a rotating magnetic field at a stator, the contact portion of the coil of the desired phase among the coils of the plurality of phases and a portion rising from a slot toward the axis of a core are aligned and disposed to have a shape which prevents them from interferring with end portions of the coils of other phases.