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Title:
ELECTRODE LIFTING DEVICE
Document Type and Number:
Japanese Patent JP2014052144
Kind Code:
A
Abstract:

To provide an electrode lifting device that prevents decrease of an arc voltage at the time when a system voltage decreases, and can improve operation efficiency and reduce electric power costs.

An electrode lifting device includes an electrode 2, a driver 5 and a controller 6. The controller 6 includes a control circuit 11 and a correction circuit. The control circuit 11 outputs control signals with respect to the driver 5 so that a ratio of an arc current supplied to the electrode 2 and an arc voltage is made constant. The correction circuit corrects the control signals output from the control circuit 11 when a system voltage is lower than a predetermined value, and arranges the electrode 2 at a higher position than that when the control signals output from the control circuit 11 are input to the driver 5 as they are.


Inventors:
KUWABARA KOICHIRO
Application Number:
JP2012000197357
Publication Date:
March 20, 2014
Filing Date:
September 07, 2012
Export Citation:
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Assignee:
TOSHIBA MITSUBISHI ELEC INC
International Classes:
F27B3/08; F27D11/08
Domestic Patent References:
JPH0230892U1990-02-27
JPH033700U1991-01-16
JPH07161473A1995-06-23
JPS5012639A1975-02-08
JP2003279269A2003-10-02
JP2008210594A2008-09-11
JPH05135871A1993-06-01
JP2008202867A2008-09-04
JPH0230892U1990-02-27
JPH033700U1991-01-16
JPH07161473A1995-06-23
JPS5012639A1975-02-08
JP2003279269A2003-10-02
JP2008210594A2008-09-11
JPH05135871A1993-06-01
JP2008202867A2008-09-04
Attorney, Agent or Firm:
高田 守
高橋 英樹



 
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