B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
327/70
B23K 9/10 (2006.01)
Patent
CA 1334302
Disclosed is an apparatus and method that optimize the output voltage and output current provided by an electronic welding station to a welding operation. A value for a specified welding operation parameter is selected and the values for other welding operation parameters that produce optimum welding results are recorded. These values are used to implement a control system which automatically varies these other parameters as a function of the adjustment of the selected parameter. Therefore, an operator need only adjust a single control parameter for a welding operation and the control system automatically selects the optimum values for the other parameters. This reduces the number of controls that an operator must adjust for a welding operation and results in higher operator efficiency and optimum welding results. Also disclosed is a transistor failure selection circuit and structure for ease of maintenance. The disclosed circuit and structure reduce maintenance time and costs for a welding station. The circuit biases a specific selected transistor at a different operating point than any other transistor in a bank of transistors. Upon an overcurrent condition which exceeds the design current rating of the welding station the circuit causes the specific selected transistor to fail in preference to the failure of any other transistor located in the transistor bank. The selected transistor is mounted in a readily accessible location of the welding station and is easily replaced in the event of failure. This eliminates the need for the operator to remove the entire bank of transistors and/or other components or circuits typically found in a welding station in order to access and replace the failed transistor.
616805
Finlayson & Singlehurst
Gilliland Malcolm T.
LandOfFree
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