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:
Dec. 04, 2012
Filed:
Jan. 09, 2009
Masatsugu Nakano, Tokyo, JP;
Akira Satake, Tokyo, JP;
Kanji Shinkawa, Tokyo, JP;
Hiroyuki Akita, Tokyo, JP;
Sachiko Kawasaki, Tokyo, JP;
Masatsugu Nakano, Tokyo, JP;
Akira Satake, Tokyo, JP;
Kanji Shinkawa, Tokyo, JP;
Hiroyuki Akita, Tokyo, JP;
Sachiko Kawasaki, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A rotational angle detection device for a permanent magnet dynamo-electric machine, including: a stator (); a rotor (); and a conductive circuit that includes first conductors () extending in a direction parallel to a rotational axis of the rotor and being disposed in at least two places in a circumferential direction of the rotor, and second conductors () for electrically interconnecting the first conductors. In this case, the first conductors are each disposed within a range of an electrical angle between −45° and +45° in the circumferential direction with a magnetic pole center being set as a reference, and the conductive circuit is disposed in at least one place in the circumferential direction, and the rotational angle detection device further comprising a detection means for detecting a rotational angle of the rotor by measuring a value of a current flowing through the armature winding.