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. 10, 2016
Filed:
Jun. 10, 2011
Shunichi Wada, Chiyoda-ku, JP;
Takayuki Yamamoto, Chiyoda-ku, JP;
Ryoichi Yonezawa, Chiyoda-ku, KR;
Masaki Matsushita, Chiyoda-ku, JP;
Katsuya Ikemoto, Chiyoda-ku, KR;
Shunichi Wada, Chiyoda-ku, JP;
Takayuki Yamamoto, Chiyoda-ku, JP;
Ryoichi Yonezawa, Chiyoda-ku, KR;
Masaki Matsushita, Chiyoda-ku, JP;
Katsuya Ikemoto, Chiyoda-ku, KR;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A malfunction detection device for a resolver detects malfunction in a resolver with accuracy and stability even if a value of a square sum is varied between inside and outside of a normal range. When the resolver is in malfunction, a sine signal and a cosine signal are read. It is determined whether a malfunction determination of the resolver is prohibited, or not, from read values of the sine signal and the cosine signal, or square values thereof. When it is determined that the malfunction determination of the resolver is prohibited, the count value is accumulated and incremented every time the test value falls outside a normal range. When the count value arrives at a given value or higher, it is determined that the resolver is in malfunction.