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:
Sep. 04, 1984
Filed:
Mar. 15, 1982
Applicant:
Inventor:
Tosio Tomite, Katsuta, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310154 ; 335302 ;
Abstract
A permanent field type starting motor is provided with a permanent magnet, and a non-permanent magnet auxiliary pole which has higher reversible permeability than that of the permanent magnet. The auxiliary pole is disposed in the circumferential direction of the inner circumference of a yoke and on the magnetizing side of armature reaction relative to the center of the pole. The pole arc ratio of the auxiliary pole with respect to the center angle of the field is selected in a range from 0.07 to 0.4.