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. 17, 2000
Filed:
Apr. 23, 1999
Applicant:
Inventors:
Halit Suha Gokturk, Kadoma, JP;
Hideaki Abe, Neyagawa, JP;
Satoshi Nakayama, Hirakata, JP;
Toyokatsu Okamoto, Hikone, JP;
Assignee:
Matsushita Electric Works, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
318114 ; 318130 ; 318129 ;
Abstract
An actuator driving circuit is provided for a positive feedback amplification, through an amplifier, of a counter electromotive force generated in a stator coil of a linear actuator, for continuating a reciprocating movement of a moving element by self-oscillation of the linear actuator, and for an application of a periodic voltage to the stator coil, while the voltage is made sinusoidal if required, so as to render the driving circuit to be high in the driving efficiency and small in dimensions.