Abstract: A low voltage system and method for servicing welding equipment including a service tool that may provide a low voltage power source to the welding equipment, enabling the welding equipment to be tested in a low voltage mode of operation. The service tool may also run various test sequences on the welding equipment operating in a low voltage mode of operation to troubleshoot and diagnose any issues with the circuitry of the welding equipment.

Abstract: A welding power source configured to receive an input power includes a plurality of components and supervising circuitry configurable in a plurality of modes. The plurality of components include power conversion circuitry and background power supply. The supervising circuitry is configured to distribute the input power to the plurality of components based at least in part on a mode of the plurality of modes. The plurality of modes include a welding mode configured to distribute the input power to the power conversion circuitry and to the background power supply. The plurality of modes also include a monitoring mode configured to distribute the input power to the background power supply, and to not distribute the input power to the power conversion circuitry.

Abstract: A hydraulic lock for a hydraulic system includes a flow control valve and a second check valve. The flow control valve having a first inlet, a first outlet, a first check valve and a flow restrictor, each of the first check valve and the flow restrictor being communicably coupled to the first inlet and the first outlet and being arranged in parallel between the first inlet and the first outlet. The second check valve having a second inlet and a second outlet, the second inlet being communicably coupled to the first outlet, the second check valve further having a ball seating surface having an aperture there through, a ball, and a resilient member biasing the ball towards the ball seating surface to seal the aperture, the aperture being communicably coupled to the second inlet and the second outlet.

Abstract: A low voltage system and method for servicing welding equipment including a service tool that may provide a low voltage power source to the welding equipment, enabling the welding equipment to be tested in a low voltage mode of operation. The service tool may also run various test sequences on the welding equipment operating in a low voltage mode of operation to troubleshoot and diagnose any issues with the circuitry of the welding equipment.

Abstract: A hydraulic lock for a hydraulic system includes a flow control valve and a second check valve. The flow control valve having a first inlet, a first outlet, a first check valve and a flow restrictor, each of the first check valve and the flow restrictor being communicably coupled to the first inlet and the first outlet and being arranged in parallel between the first inlet and the first outlet. The second check valve having a second inlet and a second outlet, the second inlet being communicably coupled to the first outlet, the second check valve further having a ball seating surface having an aperture there through, a ball, and a resilient member biasing the ball towards the ball seating surface to seal the aperture, the aperture being communicably coupled to the second inlet and the second outlet.

Abstract: A welding power source configured to receive an input power includes a plurality of components and supervising circuitry configurable in a plurality of modes. The plurality of components include power conversion circuitry and background power supply. The supervising circuitry is configured to distribute the input power to the plurality of components based at least in part on a mode of the plurality of modes. The plurality of modes include a welding mode configured to distribute the input power to the power conversion circuitry and to the background power supply. The plurality of modes also include a monitoring mode configured to distribute the input power to the background power supply, and to not distribute the input power to the power conversion circuitry.

Abstract: A welding power source configured to receive an input power includes a plurality of components and supervising circuitry configurable in a plurality of modes. The plurality of components include power conversion circuitry and background power supply. The supervising circuitry is configured to distribute the input power to the plurality of components based at least in part on a mode of the plurality of modes. The plurality of modes include a welding mode configured to distribute the input power to the power conversion circuitry and to the background power supply. The plurality of modes also include a monitoring mode configured to distribute the input power to the background power supply, and to not distribute the input power to the power conversion circuitry.

Abstract: A welding power source configured to receive an input power includes a plurality of components and supervising circuitry configurable in a plurality of modes. The plurality of components include power conversion circuitry and background power supply. The supervising circuitry is configured to distribute the input power to the plurality of components based at least in part on a mode of the plurality of modes. The plurality of modes include a welding mode configured to distribute the input power to the power conversion circuitry and to the background power supply. The plurality of modes also include a monitoring mode configured to distribute the input power to the background power supply, and to not distribute the input power to the power conversion circuitry.

Abstract: A welding power source configured to receive an input power includes a plurality of components and supervising circuitry configurable in a plurality of modes. The plurality of components include power conversion circuitry and background power supply. The supervising circuitry is configured to distribute the input power to the plurality of components based at least in part on a mode of the plurality of modes. The plurality of modes include a welding mode configured to distribute the input power to the power conversion circuitry and to the background power supply. The plurality of modes also include a monitoring mode configured to distribute the input power to the background power supply, and to not distribute the input power to the power conversion circuitry.

Abstract: A welding power source configured to receive an input power includes a plurality of components and supervising circuitry configurable in a plurality of modes. The plurality of components include power conversion circuitry and background power supply. The supervising circuitry is configured to distribute the input power to the plurality of components based at least in part on a mode of the plurality of modes. The plurality of modes include a welding mode configured to distribute the input power to the power conversion circuitry and to the background power supply. The plurality of modes also include a monitoring mode configured to distribute the input power to the background power supply, and to not distribute the input power to the power conversion circuitry.

Abstract: A method and apparatus for heating a workpiece. An induction heating system is used to induce magnetic fields in a workpiece to inductively heat the workpiece. The induction heating system may comprise a portable power source, a portable power source controller, a fluid-cooled induction heating cable, and a portable cooling unit. The induction heating system may be used to perform a variety of induction heating operations, including: annealing, surface hardening, heat treating, stress-relieving, curing, shrink-fitting, etc.

Abstract: A method and apparatus for inducing heat within a workpiece. A flexible fluid-cooled induction heating cable is used to produce a magnetic field to induce electric current in a workpiece. The induction heating cable has separate fluid and electrical connectors to separately couple cooling fluid and electric current to and from the induction heating cable. An induction heating system having a fluid cooling unit, a power source, and a flexible fluid-cooled induction heating cable having separate fluid and electrical connectors. An extension cable may be used to enable the flexible fluid-cooled induction heating cable to be used at a greater distance from the power source and the fluid cooling unit. An insulation blanket adapted for use with a specific size workpiece may be used with the flexible fluid-cooled induction heating cable.

Abstract: A workpiece heating system having an induction heating power source and a controller. The controller is operable to control the operation of the power source according to programming instructions received from a user. The controller enables a user to establish a sequence of inductive heating operations to be performed automatically by the induction heating system from among a selection of inductive heating operations. A temperature feedback device may be included to provide the controller with the workpiece temperature. A data recorder may be provided to receive and record the workpiece temperature.

Abstract: A method and apparatus for inducing heat within a workpiece. A flexible fluid-cooled induction heating cable is used to produce a magnetic field to induce electric current in a workpiece. The induction heating cable has separate fluid and electrical connectors to separately couple cooling fluid and electric current to and from the induction heating cable. An induction heating system having a fluid cooling unit, a power source, and a flexible fluid-cooled induction heating cable having separate fluid and electrical connectors. An extension cable may be used to enable the flexible fluid-cooled induction heating cable to be used at a greater distance from the power source and the fluid cooling unit. An insulation blanket adapted for use with a specific size workpiece may be used with the flexible fluid-cooled induction heating cable.

Abstract: A method and apparatus for inductively heating a work piece. An induction heating system is used to produce a plurality of magnetic fields, each magnetic field extending through a portion of the work piece to inductively heat the work piece. At least one of the plurality of magnetic fields is oriented in a direction opposite to at least one other of the plurality of magnetic fields. The induction heating system may comprise an induction heating support structure adapted to receive the core. The induction heating system may also comprise an induction heating power source, a power source controller, an induction heating cable, and/or a fluid cooling unit.

Abstract: A method and apparatus for inducing heat within a workpiece. A flexible fluid-cooled induction heating cable is used to produce a magnetic field to induce electric current in a workpiece. The induction heating cable has separate fluid and electrical connectors to separately couple cooling fluid and electric current to and from the induction heating cable. An induction heating system having a fluid cooling unit, a power source, and a flexible fluid-cooled induction heating cable having separate fluid and electrical connectors. An extension cable may be used to enable the flexible fluid-cooled induction heating cable to be used at a greater distance from the power source and the fluid cooling unit. An insulation blanket adapted for use with a specific size workpiece may be used with the flexible fluid-cooled induction heating cable.

Abstract: A method and apparatus for inducing heat within a workpiece. A flexible fluid-cooled induction heating cable is used to produce a magnetic field to induce electric current in a workpiece. The induction heating cable has separate fluid and electrical connectors to separately couple cooling fluid and electric current to and from the induction heating cable. An induction heating system having a fluid cooling unit, a power source, and a flexible fluid-cooled induction heating cable having separate fluid and electrical connectors. An extension cable may be used to enable the flexible fluid-cooled induction heating cable to be used at a greater distance from the power source and the fluid cooling unit. An insulation blanket adapted for use with a specific size workpiece may be used with the flexible fluid-cooled induction heating cable.

Abstract: A method and apparatus for supply welding, plasma cutting, and/or induction heating power having a ground fault interrupt (GFI) protection circuit is disclosed. The primary winding of a monitoring transformer in the GFI protection circuit is connected between the high frequency floating output of the power supply and ground. One end of the secondary of the monitoring transformer is connected to a voltage source. The other end of the secondary is connected to an impedance. The other end of the impedance is connected back to the voltage source to form a voltage divider across the voltage source. Changes in the impedance between the floating output of the power supply and ground are sensed by the GFI protection circuit and converted into a voltage. This voltage is filtered, rectified, and calibrated into a dc sense signal. The sense signal is compared to a threshold signal. In the event the sense signal exceeds the threshold signal, an interrupt signal is sent to the power supply and the power supply shuts down.