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:
Nov. 29, 2016
Filed:
Aug. 25, 2014
Thk Co., Ltd., Tokyo, JP;
THK CO., LTD., Tokyo, JP;
Abstract
A control device for linear motor where a range in which the current magnetic pole position of the linear motor exists is refined using the pulse energization with a suppressed amount of movement of the mover, direct current excitation is performed while changing the refined estimated magnetic pole position by a second amount of change smaller than a first amount of change used for refinement of the estimated magnetic pole position during pulse energization, and it is determined that the estimated magnetic pole position matches the current magnetic pole position of the linear motor when the amount of movement of the mover acquired each time the estimated magnetic pole position is changed matches the amount of movement of the second amount of change.