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. 16, 2014
Filed:
Nov. 02, 2012
Mitsubishi Electric Corporation, Chiyoda-ku, Tokyo, JP;
Takahiko Kobayashi, Chiyoda-ku, JP;
Kiyoharu Anzai, Chiyoda-ku, JP;
Noriyuki Wada, Chiyoda-ku, JP;
Daiki Matsuura, Chiyoda-ku, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A synchronous machine control apparatus is characterized by including a magnet condition estimation unit () that estimates the temperature or the magnetic flux of a permanent magnet that forms the magnetic field of a synchronous machine (), and is characterized in that the magnet condition estimation unit () coordinate-converts an armature current into currents on the γ-δ axis consisting of the γ axis and the δ axis that is perpendicular to the γ axis, based on the rotor position and the estimated γ axis, and estimates the temperature or the magnetic flux of the permanent magnet, based on the control command for the synchronous machine () and the γ-δ axis currents.