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:
Mar. 12, 2013
Filed:
Jan. 12, 2010
Naoki Imamura, Tokyo, JP;
Masahiro Iezawa, Tokyo, JP;
Satoshi Kawamura, Tokyo, JP;
Yoshitaka Onishi, Tokyo, JP;
Naoki Imamura, Tokyo, JP;
Masahiro Iezawa, Tokyo, JP;
Satoshi Kawamura, Tokyo, JP;
Yoshitaka Onishi, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
In opening/closing control for the valve mechanism to which the return torque is applied in an opening direction or a closing direction of the valve, provided are a position control system for outputting a q-axis current command based on a position deviation between a target position command directed to the brushless DC motor and the coarse present position of the motor obtained by using the position detection sensor of a pulse output type, and a current control system in which a virtual current feedback is built for outputting a phase voltage command without a current sensor based on the q-axis current command and the coarse present position of the motor obtained by using the position detection sensor of the pulse output type.