Control device for lifting magnet

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 10974933
APP PUB NO 20190270618A1
SERIAL NO

16320566

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Abstract

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When at least one of a value a detected output current to a magnet and a magnet load defined by the following formula is equal to or larger than a threshold value predetermined for the value of the detected output current or a threshold value predetermined for the magnet load, a controller constituting a control device outputs, to a control circuit, a command to decrease voltage applied to the magnet from next attracting operation. Magnet load=excitation ratio×I×V . . . ; wherein excitation ratio: excitation time/(excitation time+non-excitation time); I: value of the output current; V: voltage applied to a lifting magnet.

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Patent Owner(s)

Patent OwnerAddress
KOBELCO CONSTRUCTION MACHINERY CO LTD2-1 ITSUKAICHIKOU 2-CHOME SAEKI-KU HIROSHIMA HIROSHIMA-SHI 731-5161

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Yoshihara, Hideki Hiroshima, JP 19 154
Yumoto, Natsuki Hiroshima, JP 11 16

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