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:
Dec. 30, 2008
Filed:
Dec. 01, 2005
Shingo Kiyotani, Tsukuba, JP;
Nobuhiro Ishikawa, Tsukuba, JP;
Shingo Kiyotani, Tsukuba, JP;
Nobuhiro Ishikawa, Tsukuba, JP;
Mitutoyo Corporation, Kawasaki-shi, JP;
Abstract
A control device includes a first switch () by which an input signal to a motor speed control loop () is selected from a signal of a position control loop () and a signal of the speed control loop (), and a switch controller () that controls switching of the first switch (), so that the first switch () can switch between a quadruple loop (a current control loop, the motor speed control loop, the speed control loop () and the position control loop ()) with the speed control loop () embedded therein, and a triple loop (the current control loop, the motor speed control loop and the position control loop ()) without the speed control loop (), corresponding to a transient state and a steady state.