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:
May. 09, 2006
Filed:
Jan. 16, 2004
Hideaki Yaguchi, Toyota, JP;
Sojiro Yokoyama, Toyota, JP;
Hideaki Yaguchi, Toyota, JP;
Sojiro Yokoyama, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A control device measures time intervals Tto Tfrom the reference time until when each of the rotational angles θbn, θbnoutput from each of resolvers becomes n×60 degrees (n=1 to 12, i.e., 60 degrees to 720 degrees). Then, the control device calculates a deviation angle Δθn at each of the rotational angles at the intervals of 60 degrees by calculating T/Tto T/Tusing the measured Tto T. By substituting the calculated deviation angle Δθn into an equation, n×60°+Δθn (n=1 to 11), the control device corrects the rotational angles at the intervals of 60 degrees. The control device generates each of drive signals DRV, DRVusing each of the corrected rotational angles, and outputs each of the drive signals DRV, DRVto each of inverters. The inverters drive each of AC motors (M, M) based on each of the drive signals DRV, DRV