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:
Jul. 19, 2005
Filed:
Jun. 17, 2003
Applicants:
Shunsuke Matsubara, Yamanashi, JP;
Shinichi Kono, Yamanashi, JP;
Shinichi Horikoshi, Yamanashi, JP;
Inventors:
Assignee:
Fanuc LTD, Yamanashi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P006/18 ;
U.S. Cl.
CPC ...
Abstract
A magnetic flux produced by the current of a motor is detected by means of a Hall element, and an infinitesimal current proportional to the actual current of the motor is outputted. The outputted infinitesimal current is run through a resistor, and a potential difference across the resistor is detected by a ΔΣ modulator circuit. The motor is subjected to feedback control based on the potential difference detected by the ΔΣ modulator circuit.