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:
Aug. 18, 1998
Filed:
Oct. 21, 1996
Applicant:
Inventor:
Taro Miyakawa, Wako, JP;
Assignee:
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ; H02K / ;
U.S. Cl.
CPC ...
310 / ; 310261 ;
Abstract
An electric motor comprises a rotor rotational position indicator formed internally with a pole field portion of a rotor thereof, and a notch disposed between the pole field portion and the rotor rotational position indicator for suppressing the magnetic influence, the notch being filled with nonmagnetic materials. By virtue of the notch, the pole field and its magnetic influence upon a sensor can be suppressed, whereby appropriate home position and incremental pulses can be generated to enable accurate detection of a rotational position of the rotor.