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:
Aug. 23, 2011
Filed:
Jan. 07, 2010
Kenichi Nakazato, Tokyo, JP;
Masayuki Watanabe, Tokyo, JP;
Kenichi Nakazato, Tokyo, JP;
Masayuki Watanabe, Tokyo, JP;
Japan Aviation Electronics Industry Limited, Tokyo, JP;
Abstract
An RD converter is disclosed that has a first multiplier multiplying a resolver signal Sby an output of a SIN ROM; a second multiplier multiplying a resolver signal Sby an output of a COS ROM; a subtractor subtracting an output of the first multiplier from an output of the second multiplier; a synchronous detecting circuit detecting synchronously an output of the subtractor with reference to an excitation signal; a controller controlling an output angle θ' to make an output of the synchronous detecting circuit equal to zero; a correction data part outputting a correction angle θfor the output angle θ′; an adder adding the output angle θ′ and the correction angle θ; the SIN ROM producing a sine value of a result from the adder; and the COS ROM producing a cosine value of the result.