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GB1421670A - Method and apparaturs for determining active power and effective resistance - Google Patents

Method and apparaturs for determining active power and effective resistance

Info

Publication number
GB1421670A
GB1421670A GB5876673A GB5876673A GB1421670A GB 1421670 A GB1421670 A GB 1421670A GB 5876673 A GB5876673 A GB 5876673A GB 5876673 A GB5876673 A GB 5876673A GB 1421670 A GB1421670 A GB 1421670A
Authority
GB
United Kingdom
Prior art keywords
power
value
resistance
integral
input
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5876673A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Messer Griesheim GmbH
Original Assignee
Messer Griesheim GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
Publication of GB1421670A publication Critical patent/GB1421670A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
    • G01R27/205—Measuring contact resistance of connections, e.g. of earth connections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/24—Electric supply or control circuits therefor
    • B23K11/25—Monitoring devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/24—Electric supply or control circuits therefor
    • B23K11/25—Monitoring devices
    • B23K11/252—Monitoring devices using digital means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Arc Welding Control (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

1421670 Measuring active power; measuring resistance MESSER GRIESHEIM GmbH 19 Dec 1973 [22 Dec 1972] 58766/73 Heading G1U The power dissipated in a system and its effective resistance are measured by multiplying values corresponding to current and voltage integrating the product, periodically sampling the integral and applying it to an indicator or control device and also squaring the voltage or current, storing it over the integration period, sampling the stored value and applying it to a divider whose other input receives the sampled integral. In a spot welding system, the integrator 14, sampling gates 25, 117 and stores 33, 118, 115 are controlled by a single timing control 45. The integration period is chosen to be a few half-cycles of the power supply 142 fed to the welding electrodes 103, 104. The integrator is reset after each specified period shortly after the gate 25 is opened to set the integral value into store 33 which is erased after a fixed store period less than the integration time. The store output representing power is compared to a reference value 99 and the difference used to control the supply. Divider 122 receives the power signal as one input and a value corresponding to current squared at its other input. The output representing effective weld resistance passes to an indicator 137 and threshold trigger 138 which interrupts the supply if an abnormal resistance value arises. Specification 1412695 (Division G1) is referred to.
GB5876673A 1972-12-22 1973-12-19 Method and apparaturs for determining active power and effective resistance Expired GB1421670A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2262962A DE2262962C3 (en) 1972-12-22 1972-12-22 Method and device for determining the total effective resistance during resistance welding with alternating currents

Publications (1)

Publication Number Publication Date
GB1421670A true GB1421670A (en) 1976-01-21

Family

ID=5865243

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5876673A Expired GB1421670A (en) 1972-12-22 1973-12-19 Method and apparaturs for determining active power and effective resistance

Country Status (5)

Country Link
CH (1) CH566839A5 (en)
DE (1) DE2262962C3 (en)
FR (1) FR2211656A1 (en)
GB (1) GB1421670A (en)
NL (1) NL7316814A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173912A (en) * 1985-04-01 1986-10-22 Bristol Myers Co Weld resistance measuring apparatus

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1072215B (en) * 1975-12-24 1985-04-10 Centre Rech Metallurgique DEVICE TO CONTROL THE WELDING OF STEEL PRODUCTS
US4254466A (en) * 1979-01-29 1981-03-03 Square D Company Power factor monitoring and control system for resistance welding
DE3332697A1 (en) * 1983-09-10 1985-03-28 Robert Bosch Gmbh, 7000 Stuttgart Control system for the automatic control of resistance welding devices
DE102005019640A1 (en) * 2005-04-26 2006-11-09 PROMESS Gesellschaft für Montage- und Prüfsysteme mbH Method and apparatus for resistance spot welding

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173912A (en) * 1985-04-01 1986-10-22 Bristol Myers Co Weld resistance measuring apparatus
GB2173912B (en) * 1985-04-01 1989-06-21 Bristol Myers Co Spot welder

Also Published As

Publication number Publication date
DE2262962C3 (en) 1978-08-10
CH566839A5 (en) 1975-09-30
DE2262962B2 (en) 1977-12-15
NL7316814A (en) 1974-06-25
DE2262962A1 (en) 1974-07-11
FR2211656A1 (en) 1974-07-19

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee