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7351932 Method and apparatus for welding with voltage control  
A method and apparatus for providing welding-type power includes an input circuit, a switched circuit connected to the input circuit, and an output circuit connected to the switched circuit. A...
7351931 Switching power supply apparatus and electronic device using the same  
Provided is a switching power supply unit which uses a multilayer board or a stack of planar conductors as the windings of transformers so as to reduce the volume of the transformers and to have...
7271365 System and method for pulse welding  
Systems and methods are provided for pulse welding, in which a welding signal is provided to an electrode in series of pulse welding cycles, where the amount of energy applied to the electrode in...
7217904 Electric arc welder and method for controlling the welding process of the welder  
An operating system is provided for an electric arc welder including a high switching speed inverter power source for creating an arc voltage and arc current between an electrode and a workpiece....
7109439 Short circuit arc welder and method of controlling same  
An electric arc welder operated to perform a short circuit welding process between an electrode and a workpiece, where the process comprises a succession of alternate short circuit conditions and...
7060935 Power supply for electric arc welding  
A power supply connectable to a source of AC line voltage for AC electric arc welding by an AC arc current across a welding gap between an electrode and a workpiece, the power supply comprises a...
6906284 Arc welding method  
The present invention relates to an arc welding method in which generation of spatters can be suppressed while the use quantity of gas to be supplied to a welding portion can be decreased. A...
6899261 Method and arrangement for a martensite-free brazing process  
An apparatus for brazing a connecting piece of electrically conducting material such as metal, to a metal surface by means of a new type of temperature-controlled brazing whereby for certain types...
6870132 Power supply for electric arc welding  
A power supply connectable to a source of AC line voltage for AC electric arc welding by an AC arc current across a welding gap between an electrode and a workpiece, the power supply comprises a...
6730875 System and method for estimating true heats of welding processes  
An arc welding apparatus ( 10 ) for performing a waveform-controlled arc welding process includes an arc welding torch ( 14 ) that interacts with an associated weld. A power supply ( 12 ) applies a...
6713708 Portable drawn arc stud welding apparatus and method providing high current output in short time intervals  
A stud welder utilizing a frequency inverter which is capable of delivering in access of 1000 A for a short duration of about 1 second using double-sided cooled power semiconductors. The inverter...
6660965 Welding assessment  
An apparatus and process for determining whether a fault has occurred in a welding process while the process is under way. The invention is applicable to welding and cutting processes where there...
6570131 Electric arc welder with arc starter  
In a standard electric arc welder of the type having a main power supply with an off condition directing no current across an electrode and a workpiece and an on condition directing welding current...
6512200 Welding control system  
A system 11 for controlling an arc welding system 10 operating in a dip transfer mode is disclosed. The control system is operative to control the current output from a power source so as to...
6504738 Freewheeling current conduction in welding power supply  
A power circuit for a welding power supply includes a rectifier circuit and a control circuit. The rectifier circuit includes a plurality of switches (e.g., silicon-controlled rectifiers). The...
6504132 Electric arc welder for variable AC input  
An electric arc welder with a variable AC voltage input of up to 600 VAC and a rectifier to provide a DC link, a driven high frequency boost stage with first and second leads connected to the DC...
6498321 System and method for controlling an electric arc welder  
A control system for an electric arc welder performing a welding process between an electrode and a workpiece, which system comprises: a high speed switching type power supply with a controller...
6476354 Method for controlling a welding apparatus and corresponding control device  
The invention describes a method of controlling a welding unit ( 1 ) and a current source ( 2 ), in which various welding parameters, such as a welding current, a welding wire diameter, a welding...
6388233 Method and apparatus for arc welding with melting electrode  
The invention comprises a method and an arrangement for pulsed gas metal-arc welding with an electrode fed to the welding site continuously at a given rate, the fusion conditions being adapted in...
6388232 Starting and welding device for DC TIG welder and method of operating same  
A DC TIG welder operable at a set low current level under about 5 amperes in a welding circuit including an electrode separated from a workpiece by a gap, the welder having an output welding...
6333489 Welding power supply with reduced OCV  
A method and apparatus for providing welding power includes controlling a phase controlled power circuit to provide a reduced OCV output. Preferably, the output is controlled in response to...
6310321 Engine driven inverter welding power supply  
A method and apparatus for welding with an engine driven inverter power supply includes generating an ac output with an engine and generator. The output is rectified and inverted to provide an ac...
6310320 Dual operator phase control engine driven welder  
A method and apparatus for providing welding power includes two power sources (first and second), each having an output. A linking circuit selectively connects the power sources in one of an...
6278081 Method and apparatus for producing welding power  
A method and apparatus for providing submerged arc welding power is disclosed. The power supply is AC/DC, and may be controlled in either a CV or a CC mode. The power supply includes a...
6248976 Method of controlling arc welding processes and welder using same  
A method of generating a real time control signal for use in an electric arc welding process having welding voltage and welding current, said method comprising: measuring the welding voltage and...
6051807 Pulse arc welding apparatus  
A pulse arc welding apparatus feeds a consumable electrode with a constant rate, and arc-welds by applying a welding current constituted of a pulse current of a constant voltage characteristic and...
6051806 Power supply apparatus for welders and method of manufacturing same  
A power supply apparatus for welders includes an input-side AC-to-DC converter for converting an input commercial AC voltage into a DC voltage, which is, in turn, converted to a high-frequency...
6040556 Engine driven arc welder  
An engine driven arc welder including a welding generator driven by an engine; output circuits for controlling the output of the welding generator in accordance with a control signal and for...
6015964 Electric arc welder with controlled arc  
In an electric arc welder for creating an electric arc for melting and depositing metal from an advancing welding wire onto a workpiece, said welder including a power supply having a switch...
6005220 Method and apparatus for electronically controlling the output of an engine driven generator welding power supply  
A method and apparatus for providing a welding output is disclosed. The apparatus includes a an ac generator having a field winding, a welding output winding and an electronic field controller...
5942139 Consumable electrode DC arc welder  
DC power from a smoothing capacitor is converted into high frequency power by an inverter, and then lowered by an output transformer. The lowered high frequency power is converted into DC power by...
5900169 Safety circuit for a blow forward contact start plasma arc torch  
A safety circuit is utilized in a blow forward contact start plasma arc torch to extinguish the current to the torch upon determination of an unsafe operating condition. The torch includes a torch...
5864116 D.C. chopper with inductance control for welding  
A multi-stage down chopper for arc welding by creating current flow between an electrode and a workpiece, the chopper includes a D.C. input source, a first switching stage, with a first switch...
5814788 Method and apparatus for electronic control of the output of an engine driven, chopped DC welding power supply, driven by an AC generator  
An engine driven welding power supply is disclosed. The power supply produces a welding output having a plurality of volt-ampere curves. Each of the curves is associated with a selected current...
5756963 Saturation sensing power source and related methods for a welding or cutting system  
A power source for a welding or cutting system is provided which preferably includes a power switching circuit, a switching cessation detector, and overshoot reducing means. The power switching...
5670070 Method and system for controlling the output of an engine driven welder  
A method and system of controlling the output current/voltage characteristic curve of an engine driven alternator welder with a maximum open circuit output voltage, including a rotary engine, a...
5457300 Consumable electrode DC arc welder  
An inverter controlled DC arc welder of consumable electrode type includes an input rectifier for rectifying AC input power, an inverter for converting the rectifier output to high frequency AC...
5281791 Pulsed arc welding apparatus  
A pulsed arc welding for carrying out arc welding or short-circuit transfer type arc welding by utilizing the pulsed discharge generated at the tip of a wire electrode. The propensity of wire...
5270516 Arc welding machine  
An arc welding machine comprises an output control circuit which produces an arc output in accordance with output control signal, an output detection circuit which measures the state of arc output...
5245546 Welding arc length control system  
The present invention is a welding arc length control system. The system includes, in its broadest aspects, a power source for providing welding current, a power amplification system, a motorized...
5233158 Arc welding current and voltage control method  
A control method capable of effecting satisfactory arc welding by automatically controlling arc welding current and voltage. A processor calculates (106, 112) errors (εI, εV) between mean value...
5212361 Method and apparatus for forming balls at the ends of wires  
A method of forming a ball on the end of a wire by electrical discharge between the wire and an electrode includes detecting the discharge voltage and discharge current of an electrical discharge...
4916599 Switching power supply  
A pulse-width-modulated, switching power supply has a pulse width modulator, a full bridge network driving a pulse transformer, power switching section, a high frequency power transformer, an...
4794232 Control for gas metal arc welding system  
An arc welder control in which the current is pulsed between a high level and a low level. The high level pulse is maintained until a selected energy condition is satisfied. The low level pulse is...
4721843 Method and apparatus for controlling an arc welding energy source during an arc welding operation  
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...
4628182 Hot-wire TIG welding apparatus  
A hot wire TIG welding apparatus has a current detector for detecting the peak period and base period of the arc current. The welding apparatus further has a controller which controls, in response...
4628181 Method of controlling the output characteristic of a welding power source, apparatus for arc welding, and electrical circuit to be used for such apparatus  
A method and apparatus for arc welding particularly regarding a pulse arc welding machine comprising a welding power source having an output characteristic control circuit, an overload protection...
4575604 Constant potential/constant current automatic control system for air-carbon arc metal removal  
A control system for air-carbon arc metal removal in which the arc is automatically controlled and in which the arc power is produced by either a constant potential or constant current power...
4564742 Source of power for arc welding  
Power sources for welding applications and the like are provided in accordance with the teachings of the present invention. An inverter arrangement comprising a plurality of inverters, having...
4553018 Short circuiting transfer arc welding machine  
A short circuiting arc welding machine increases an arc current density by adding a pulsed current having upper and lower limits to a current flowing when an arc is produced, thereby increasing the...
Matches 1 - 50 out of 94 1 2 >