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:
Apr. 17, 2001
Filed:
Jul. 26, 1999
Abstract
The motor includes the following elements: a stator-core having plural teeth, and a yoke that links the teeth, coils wound on the teeth in a concentrated winding form, and a rotor with interior permanent magnets. The rotor with interior permanent magnets includes the following elements: a rotor core having plural slits of which ends extend closely to the rotor circumference, permanent magnets positioned in the slits, non-magnetic-sections provided between the circumference of the rotor-core and respective ends of permanent magnets. This construction allows the motor to withstand persistently demagnetization, to be a smaller size with high efficiency, and to be manufactured in a highly efficient manner. The motor can be integrated as a driver into an apparatus driving unit.