Title:
リフティングマグネット装置
Document Type and Number:
Japanese Patent JP6737545
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a lifting magnet device with a function to detect an abnormal state that an electric current constantly flows in a regenerative resistor.SOLUTION: A lifting magnet device includes a lifting magnet, a magnet control part, and display/perception part. The magnet control part includes a control device, a regenerative resistor that consumes regenerative power from the magnet, and state detection means for detecting the state of the regenerative resistor. The control device sends a command to cause the display/perception part to perceive an abnormal state when a regenerative resistance circuit is in an abnormal state in which a voltage is constantly applied to the regenerative resistance circuit according to a signal from the state detection means. When a circuit component that switches on and off an electric current to the regenerative resistor breaks down, and the electric current constantly flows in the regenerative resistor, the abnormal state can be perceived by an operator, thereby preventing a damage to the circuit component by heat generation of the regenerative resistor.SELECTED DRAWING: Figure 1
Inventors:
Yokoyama Takashi
Application Number:
JP2016063702A
Publication Date:
August 12, 2020
Filing Date:
March 28, 2016
Export Citation:
Assignee:
Sumitomo Heavy Industries Ltd.
International Classes:
B66C1/08
Domestic Patent References:
| JP2007119160A | ||||
| JP9009660A | ||||
| JP2008222368A | ||||
| JP2010035359A | ||||
| JP2008214083A | ||||
| JP2006262616A | ||||
| JP2013192392A | ||||
| JP61214781A |
Foreign References:
| US20140313621 |
Attorney, Agent or Firm:
Yamauchi Patent Office