The invention provides a DSC-based full-digital SiC inversion type multi-function argon arc welding power supply, which includes a main circuit and a DSC control circuit; the main circuit includes a common mode noise suppression module, a power frequency rectification and filter module, a SiC inversion and commutation module, power transformer, a SiC rectification and smoothing module and a non-contact arc ignition module connected in sequence and are respectively connected to external arc load; the DSC control circuit includes a DSC minimum system, a human-machine interaction module, a fault diagnosis and protection module, a SiC high-frequency drive module connected to SiC inversion and commutation module, and an electrical load signal detection module connected to the arc load. The argon arc welding power supply has a simple structure, high control accuracy, fast response, small size, high efficiency, low energy consumption and excellent process adaptability, which can improve the quality of welding process.

A method of forming a microelectronic device structure comprises coiling a portion of a wire up and around at least one sidewall of a structure protruding from a substrate. At least one interface between an upper region of the structure and an upper region of the coiled portion of the wire is welded to form a fused region between the structure and the wire.

A method is provided for controlling a neck detection for a welding power supply. The neck detection can be suitably performed even if the welding power supply is combined with another power supply for performing a simultaneous arc welding operation at a plurality of locations of a workpiece. The method includes using a control target welding power supply together with another power supply for performing arc welding concurrently at a plurality of locations of a common workpiece, detecting a neck in a molten portion of a welding wire which is brought into short-circuiting contact with the common workpiece, reducing the welding current for forming an arc, and automatically adjusting a neck detection value.

A method and apparatus for providing welding type power includes a phase shifted double forward converter having a first and second converter and a controller. The controller includes a pwm module that sets the pwm timing signals. The pwm module includes a phase shift module that has a leading edge adjusted output and a trailing edge adjusted output responsive to the output load. The phase shift module also includes a duty cycle offset module and/or a Dmax module that is responsive to the output load current. The pwm module includes a disabling module responsive to at least one of the output current and output voltage that disables one of the first and second converters.

A method and apparatus for providing welding type power includes a phase shifted double forward converter having a first and second converter with a controller and an output rectifier. The output rectifier has at least one cathode current path that creates a cathode magnetic field when current flows in the cathode current path. The output rectifier also has at least one anode current path that creates an anode magnetic field when current flows in the anode current path. The cathode current path is disposed and oriented and the anode current path is disposed and oriented such that the cathode magnetic field acts to at least partially cancel the anode magnetic field.

A system for controlling a weld-current in an arc welding apparatus for short arc welding comprising a current regulator included in a voltage feedback loop from a power supply to a welding electrode and a ramp generator arranged to provide current ramps during a short circuit phase at said welding electrode.

A system and method is provided. The system includes a first power supply that outputs a welding current that includes welding pulse currents and a background welding current. The system also includes a second power supply that outputs a heating current that includes first heating pulse currents at a first polarity and second heating pulse currents at an opposite polarity. The system also includes a controller that synchronizes at least one of the first heating pulse currents and the second heating pulse currents with at least one of the welding pulse currents and the background current to influence a position of an arc relative to a molten puddle based on magnetic fields created by the welding current and the heating current.

A method of hardfacing a metal component includes welding a surface area of the metal component using a Cold Metal Transfer (CMT) process. The method of hardfacing the metal component includes performing the CMT welding process in a weaving pattern over the surface area of the component. A consumable, low carbon steel wire electrode is used in the CMT process.

A dual-pulse MIG welding power source based on SiC power devices may include a main circuit and a digital control circuit. The main circuit may include a power frequency rectifier filter module, a first SiC high frequency inverter module, a first high frequency transformer, and a first SiC fast full-wave rectifier filter module connected sequentially. The power frequency rectifier filter module may be connected to a three-phase AC power supply, and the first SiC fast full-wave rectifier filter module may be connected to a load. The digital control circuit may include a digital human-machine interaction module, a core control module, a SiC high-frequency drive module, a load voltage and current detection feedback module, and a wire feeding control module. The digital human-machine interaction module may be connected to the core control module.

Two welding wires whose current values are individually variable are placed along a groove of steel plates, and two operations are repeated, the first operation including: passing substantially the same current through both welding wires; generating a cathode spot in front of a molten pool by one welding wire's arc on a welding-direction forward side; and cleaning the steel plates' surfaces by the arc, and the second operation including: passing a pulse current having a higher value than that of the welding wire through the other welding wire, so that a cathode spot is generated in the molten pool by each welding wire's arc to newly form a molten pool; and advancing both welding wires in the welding direction to move the cathode spot to the newly-formed molten pool, and at the same time performing welding within an area where oxides on the steel plates' surfaces are removed.