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:
Sep. 26, 2017
Filed:
Jan. 25, 2017
Fuji Electric Co., Ltd., Kanagawa, JP;
Yuji Matsuzoe, Tokyo, JP;
Tsuyoshi Inoue, Tokyo, JP;
FUJI ELECTRIC CO., LTD., Kawasaki-shi, Kanagawa, JP;
Abstract
A diagnostic apparatus that diagnoses a cutter tool or a rotating machine based on electric power supplied to the rotating machine, includes: an electric power measurement unit that measures the electric power; and a filtering unit that filters noises input from an input side and an output side of the electric power measurement unit, the electric power measurement unit including a Hall element, and applied voltage of an electric power supply line, that supplies the electric power to the rotating machine from an inverter or a servo amplifier, is input in the Hall element, wherein the electric power is calculated based on Hall voltage that is generated, when Hall current flows through the Hall element and magnetic flux is applied to a sensor surface of the Hall element, the Hall voltage being proportional to a product of the magnetic flux and the Hall current.