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. 19, 1998
Filed:
Dec. 27, 1994
Yuichi Nanae, Saitama, JP;
Koichi Inagaki, Chiba, JP;
Sony Corporation, Tokyo, JP;
Abstract
An iron motor device includes an iron core motor the rotor of which is rotationally driven a pre-set angle by electromagnetic induction responsive to phase switching of current supply to two-phase coils wound on an iron core, and a driving control unit for generating a driving control signal based on the phase information of differentially phased backward voltages induced in the two-phase coils. The driving control unit causes shorting of the backward voltage induced in the coil the current supply in which is interrupted by phase switching of current supply to the two-phase coils by providing a pre-set time delay in the turn-off timing of the switching device connected to the coil the current conduction in which is interrupted. The method for drive controlling the iron core motor device is also disclosed.