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. 30, 2017
Filed:
Feb. 22, 2013
Yoshinao Tatei, Tokyo, JP;
Takeshi Musha, Tokyo, JP;
Hajime Nakajima, Tokyo, JP;
Takashi Okamuro, Tokyo, JP;
Masanori Nimura, Tokyo, JP;
Yoshinao Tatei, Tokyo, JP;
Takeshi Musha, Tokyo, JP;
Hajime Nakajima, Tokyo, JP;
Takashi Okamuro, Tokyo, JP;
Masanori Nimura, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A rotation number detector according to an embodiment is a rotation number detector that detects the number of rotations of a magnet attached to a rotating body by using a power generation unit. The power generation unit includes N (N is a natural number equal to or larger than 1) power generation elements, each including a magnetic wire in which magnetization reversal occurs due to a large Barkhausen effect and a pickup coil that is wound around the magnetic wire. The magnetic wire is longer than a wound portion of the pickup coil in an extension direction of the magnetic wire of the power generation elements. The magnetic wire is set above a rotation center of the magnet.