Abstract: A connector and sensor unit for a welding apparatus, including a first port configured to be connected to a first welding cable of the welding apparatus, a second port configured to be connected to a second welding cable of the welding apparatus, current sensor circuitry configured to sense a current being supplied by the first welding cable and the second welding cable, and to output a corresponding current sense signal, voltage sensing circuitry configured to sense a voltage between the first welding cable and the second welding cable, and to output a corresponding voltage sense signal, and supply power circuitry configured to generate a predetermined voltage for at least the current sensor circuitry, wherein the supply power circuitry receives power from the first welding cable and the second welding cable via at least one inductor.

Abstract: A connector and sensor unit for a welding apparatus, including a first port configured to be connected to a first welding cable of the welding apparatus, a second port configured to be connected to a second welding cable of the welding apparatus, current sensor circuitry configured to sense a current being supplied by the first welding cable and the second welding cable, and to output a corresponding current sense signal, voltage sensing circuitry configured to sense a voltage between the first welding cable and the second welding cable, and to output a corresponding voltage sense signal, and supply power circuitry configured to generate a predetermined voltage for at least the current sensor circuitry, wherein the supply power circuitry receives power from the first welding cable and the second welding cable via at least one inductor.

Abstract: A connector and sensor unit for a welding apparatus, including a first port configured to be connected to a first welding cable of the welding apparatus, a second port configured to be connected to a second welding cable of the welding apparatus, current sensor circuitry configured to sense a current being supplied by the first welding cable and the second welding cable, and to output a corresponding current sense signal, voltage sensing circuitry configured to sense a voltage between the first welding cable and the second welding cable, and to output a corresponding voltage sense signal, and supply power circuitry configured to generate a predetermined voltage for at least the current sensor circuitry, wherein the supply power circuitry receives power from the first welding cable and the second welding cable via at least one inductor.

Abstract: A connector and sensor unit for a welding apparatus, including a first port configured to be connected to a first welding cable of the welding apparatus, a second port configured to be connected to a second welding cable of the welding apparatus, current sensor circuitry configured to sense a current being supplied by the first welding cable and the second welding cable, and to output a corresponding current sense signal, voltage sensing circuitry configured to sense a voltage between the first welding cable and the second welding cable, and to output a corresponding voltage sense signal, and supply power circuitry configured to generate a predetermined voltage for at least the current sensor circuitry, wherein the supply power circuitry receives power from the first welding cable and the second welding cable via at least one inductor.

Abstract: A cutting and welding system is disclosed which includes a metering system for controlling at a location remote from the plasma arc torch the amount of gas and water fed to the plasma arc torch. The system includes at least one torch having an electrode, a nozzle assembly positioned adjacent the discharge end of the electrode, and structure for generating a flow of gas between the electrode and the nozzle assembly to create plasma flow through the bore to a workpiece. A gas line communicates with a source of gas and the plasma arc torch for supplying gas to the torch. A plurality of metering orifices are positioned within the gas flow line in a parallel bank with each other so that the gas may flow through each of the metering orifices. Each metering orifice has a predetermined diameter opening. A gas control valve is mounted adjacent each of the metering orifices within the gas flow line on the upstream side toward the supply of gas.

Abstract: A method of controlling a welding operation during arc welding between a fusible electrode and a workpiece, wherein the welding operation alternates between arc periods and short-circuiting periods, includes the steps of sensing a first parameter of the welding operation, for example the arc voltage between the electrode and the workpiece, generating a first signal representative of the first parameter, sensing a second parameter of the welding operation, generating a second signal representative of the second parameter, filtering the second signal to provide a filtered signal, generating a desired value signal based upon the filtered signal and controlling the welding operation based upon the difference between the desired value signal and the first signal.