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. 04, 2014
Filed:
Jun. 16, 2010
Daisuke Hirono, Isesaki, JP;
Daisuke Hirono, Isesaki, JP;
Sanden Corporation, Isesaki-shi, JP;
Abstract
To provide is a motor control device capable of detecting a rotor position of a synchronous motor under a certain accuracy and a low processing load. The motor control device detects the rotor position θm by directly finding a rotor position θm from a rotor position expression (θm=θi−β−90°) containing, as a variable, a current electrical angle θi from among a phase current peak value Ip and a phase current electrical angle θi detected in a phase current peak value and electrical angle detection unitand an induced voltage peak value Ep and an induced voltage electrical angle θe detected in an induced voltage peak value and electrical angle detection unit, and containing, as a variable, a current phase β capable of being selected using [a phase current peak value Ip] and [an induced voltage electrical angle θe−a phase current electrical angle θi] as parameters from a predefined data table.