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:
Apr. 16, 2019
Filed:
Jun. 14, 2016
Kobelco Construction Machinery Co., Ltd., Hiroshima-shi, JP;
Natsuki Yumoto, Hiroshima, JP;
Nobuhiro Koga, Hiroshima, JP;
Hideki Yoshihara, Hiroshima, JP;
Yoshitsugu Tamura, Tokyo, JP;
Yoshifumi Asai, Tokyo, JP;
KOBELCO CONSTRUCTION MACHINERY CO., LTD., Hiroshima-shi, JP;
Abstract
Simplification of a device configuration and control is realized, which enables attraction and release by a magnet without using a battery. A magnet work machine includes a generator motor () driven by an engine (); and an inverter () which controls a magnet () and the generator motor () such that the magnet () is energized by electric power from the generator motor () to attract metal scraps or the like, and during demagnetization for releasing metal scraps or the like, electric power applied to the magnet () is transmitted to the generator motor () as regenerative power so as to be consumed. The inverter () determines a torque of the generator motor () as a motor according to a voltage change of a main circuit based on a detected main circuit voltage so as to suppress the voltage change, and gives the torque as a command.