Results 261 to 270 of about 24,703 (309)

The measurement of spot-welding current

Electrical Engineering, 1940
CURRENT is an essential factor in the complete specification of spot-welding conditions. Therefore, the need for the measurement of spot-welding currents arises, if optimum conditions determined in experimental laboratories are to be duplicated in production shops. Laboratory methods must be accurate and supplemented by facilities for ready calibration
Wendell F. Hess, Robert A. Wyant, Albert Muller   +2 more
openaire   +1 more source

Impact of the Switching Frequency on the Welding Current of a Spot-Welding System

IEEE Transactions on Industrial Electronics, 2017
This paper deals with an analysis of a middle-frequency resistance spot-welding (RSW) system with a dc welding current controlled by a pulsewidth modulated inverter, which supplies a welding transformer with a full-wave rectifier mounted at the secondary.
Robert Brezovnik, Jernej Cernelic, Martin Petrun, Drago Dolinar, Jozef Ritonja   +4 more
openaire   +1 more source

Current Issues and Problems in Welding Science

Science, 1992
Losses of life and property due to catastrophic failure of structures are often traced to defective welds. However, major advances have taken place in welding science and technology in the last few decades. With the development of new methodologies at the crossroad of basic and applied sciences, the promise of science-based tailoring of composition ...
S A, David, T, Debroy
openaire   +2 more sources

A method of determining the welding current in multispot contact welding

Measurement Techniques, 2010
A method of measuring the welding current on each electrode in bilateral multispot contact welding and of determining its actual values, taking bridging into account, is proposed.
F. Yu. Pkhakadze, M. Sh. Shalamberidze, K. D. Mgaloblishvili, G. G. Dadunashvili   +3 more
openaire   +1 more source

Spectral composition of welding current and efficiency of welding inverter

2012 International Conference on Actual Problems of Electron Devices Engineering, 2012
On the basis of a computer model of the welding inverter with PWM control output impulses of alternating current the spectral composition of this current and its relation to efficiency at different values of operating frequency and duty cycle were investigate.
V.M. Bardin, A.V. Pivkin
openaire   +1 more source

A regulator of a welding current source

Welding International, 2005
(2005). A regulator of a welding current source. Welding International: Vol. 19, No. 1, pp. 75-77.
V A Lebedev, S I Pritula, V S Romanyuk, I S Kuz'min, V G Novgorodski   +4 more
openaire   +1 more source

Current Regulation in Contact Welding

Russian Engineering Research, 2019
Algorithms for current stabilization in the control of contact welding are considered. The proposed method for specifying and maintaining the welding current permits correction of the thyristor firing angle by means of an approximate formula taking account of the measured current-pulse parameters in phase regulation.
A. S. Klimov, A. N. Antsiborov, V. S. Klimov, A. K. Kudinov   +3 more
openaire   +1 more source

Calibration of Weld Current Monitors at INTI Argentina

2020 Conference on Precision Electromagnetic Measurements (CPEM), 2020
This paper describes a development of a calibration system for weld testers, or weld current monitors, at the Instituto Nacional de Tecnologia Industrial (INTI) in Argentina. The calibration system is presently capable of generating short duration currents of up to 15 kA.
Casais, José Luis, Bierzychudek, Marcos E., Djokic, Branislav, Parks, Harold   +3 more
openaire   +1 more source