Browse Prior Art Database

Welder Control Circuit

IP.com Disclosure Number: IPCOM000096940D
Original Publication Date: 1962-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Gates, HR: AUTHOR

Abstract

Instantaneous power is measured in a welding circuit by using a Hall generator 10, a semiconductor device utilizing the Hall effect. Generator 10 is placed in the magnetic fields of a welder loop comprising electrodes 11 and 12 and connected across the weld point. In this configuration at the generator (Image Omitted) R(i) = internal impedance of the generator, it is found that (Image Omitted) B = Magnetic field intensity in Kilogauss V(Ho) = Open circuit Hall voltage K(H) = Hall constant calibrated from known B and I(c) (Image Omitted) B = K(1) Iw, where K(1) is derived from the geometry (Image Omitted)

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Welder Control Circuit

Instantaneous power is measured in a welding circuit by using a Hall generator 10, a semiconductor device utilizing the Hall effect. Generator 10 is placed in the magnetic fields of a welder loop comprising electrodes 11 and 12 and connected across the weld point. In this configuration at the generator

(Image Omitted)

R(i) = internal impedance of the generator, it is found that

(Image Omitted)

B = Magnetic field intensity in Kilogauss

V(Ho) = Open circuit Hall voltage

K(H) = Hall constant calibrated from known B and I(c)

(Image Omitted)

B = K(1) Iw, where K(1) is derived from the geometry

(Image Omitted)

This output is passed through differential preamplifier 14 to vacuum tube voltmeter 15 which registers a peak reading of power. The output from preamplifier 14 is passed through integrating amplifier 16 to vacuum tube voltmeter 17 which registers a peak reading of total energy. Voltmeters 15 and 17 are each set to give a +1 output, if the sensed peak voltage is acceptable. Each +1 actuates AND 18 to give a go no go signal to either stop or continue welding.

Voltmeter 15 reads peak power in kilowatts =

K(3) IwVw

Voltmeter 17 reads total energy in watt seconds =

(Image Omitted)

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