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:
Oct. 19, 1999
Filed:
Jul. 29, 1997
Satoshi Itou, Fujieda, JP;
Hiroshi Iwai, Fujieda, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A motor driving system for a brushless motor is comprised of a drive magnet, a rotor provided with the drive magnet and supported by the shaft, 3-phase stator coils provided on a substrate and facing to the drive magnet, two Hall elements exposed to magnetic fluxes of the drive magnet and outputting Hall signals having a 120 degrees phase difference, an amplitude control device for equalizing an amplitude difference between the Hall signals and outputting equalized Hall signals, a signal compounding device for compounding the equalized Hall signals and outputting a compound signal, a drive circuit for switching drive currents to be supplied to the 3-phase stator coils in response to the equalized Hall signals and the compound signal.