Patent application number | Description | Published |
20080272099 | System and Method for Controlling Harmonics Injected onto an Input Line by a Welding-Type System - A system and method for operating an inverted-based power source includes a power input configured to receive alternating current (AC) power and a rectifier configured to convert the AC power to direct current (DC) power. The inverter-based power source also includes an inverter configured to receive the DC power from the rectifier and convert the DC power to AC power and a controller configured to generate switching signals according to a pattern of offsets from a regular half period and communicate the switching signals to the inverter or rectifier control operation of the inverter or rectifier. | 11-06-2008 |
20090057285 | PORTABLE BATTERY POWERED WELDER - A portable battery powered welder is disclosed that is configured to operate without an external power source. The portable battery powered welder may include a battery coupled to a welding circuit and a wire feeder. Further, the portable battery powered welder may include a suitcase to integrally support and completely enclose the welding circuit, the battery, and the wire feeder. The suitcase may include a lateral access door having a hinge and a latch. Additionally, the wire feeder and a wire spool may be disposed in a region accessible by the lateral access door. The suitcase may also include an access panel disposed over a region containing the battery. The access panel may be mounted to the case via a snap mount and/or secured via fasteners. Finally, the suitcase may include a top handle and may be made of a lightweight, impact resistant, and flame retardant material. | 03-05-2009 |
20090066288 | BATTERY CHARGER WITH WIND TUNNEL COOLING - A battery charging system which includes a main housing with a main chamber defined by a base, an end panel mounted on each end of the base, and a cover enclosing the end panels. At least one battery charging connector is connected to the housing. A power supply is connected to the at least one battery charging connector, where the power supply provides a battery charging electrical power to the at least one battery charging connector. The power supply has at least one heat generating electrical device. A tunnel is formed at least partially within the main chamber and extends between the end panels in the main chamber. At least one heat generating electrical device at least partially extends into the tunnel to be exposed to air in the tunnel to cool the heat generating electrical device. | 03-12-2009 |
20090066289 | BATTERY CHARGER WITH A PLANAR BUS - A battery charging system which includes an input circuit configured to receive an input power and provide an output power on a first output terminal and a second output terminal. An output circuit has a first input terminal connected to the first output terminal and a second input terminal connected to the second output terminal to receive the output power and configured to condition the output power for a battery charging process. A first conductive plate with a first bus surface extends between the first input terminal and the first output terminal. An insulator plate has a first insulator surface disposed in an abutting relationship with the first bus surface and a second insulator surface. A second conductive plate has a second bus surface which extend between the second input terminal and the second output terminal and is disposed in an abutting relationship with the second insulator surface. | 03-12-2009 |
20090066290 | BATTERY CHARGER WITH HIGH FREQUENCY TRANSFORMER - A battery-charging system includes a power supply having a high-frequency transformer and is configured to deliver a battery charging power to charge at least one battery. The high-frequency transformer has a bobbin including an elongated top and bottom surfaces and first and second substantially semi-circular end surfaces connecting the top surface with the bottom surface to form an elongated first coil winding surface having a central axis. A first coil is wound around the first coil winding surface, and a second coil is magnetically coupled to the first coil and wound thereto. | 03-12-2009 |
20090201704 | CONSTANT VOLTAGE WELDER CAPACITOR RIPPLE CURRENT REDUCTION METHOD AND SYSTEM - A power circuit, in certain embodiments, includes an inductor to limit current through a capacitor, wherein the capacitor is configured to smooth ripple for a constant voltage welding system. More specifically, the power circuit may include a rectifier configured to convert AC power to DC power. The rectifier may be coupled to a DC bus configured to transmit the DC power. A capacitive circuit having the capacitor may be coupled across the DC bus to smooth ripple in the DC power. The inductor, e.g., coupled between the DC bus and the capacitive circuit, limits the rate of current flow between the capacitive circuit and the DC bus during a welding operation, thereby reducing heating in the output capacitive circuit. A further inductor may be coupled to one side of the DC bus to stabilize the rate of current flow from the power circuit to a load. | 08-13-2009 |
20100225280 | BATTERY CHARGER USING PHASE SHIFT DOUBLE FORWARD CONVERTING CIRCUIT - A technique for dynamically adjusting an output voltage of forward converter circuits for a battery charging operation is provided. The technique allows for varying voltage at the charging battery by manipulating the duty cycles of two forward converter circuits. The present disclosure provides methods and systems for increasing synchronized duty cycles in a pair of forward converter circuits in response to a changing battery charge state that requires a higher voltage output then changing a phase shift between the duty cycles in response to further increases in output voltage demand. The present disclosure also provides methods and systems for setting a phase shift between duty cycles in a pair of forward converter circuits based on battery rating and then altering pulse width in response to changing battery charge state. The invention provides a controller designed to receive input signals and generate output pulse width modulation signals that control the duty cycle width and phase shift of the outputs of the forward converter circuits in response to these signals. Methods of accommodating for the time needed for the transformer core to reset via leading edge or lagging edge compensation are provided. | 09-09-2010 |
20100308026 | WELDING POWER SUPPLY WITH DIGITAL CONTROL OF DUTY CYCLE - A welding power supply including power conversion circuitry adapted to receive a primary source of power, to utilize one or more power semiconductor switches to chop the primary source of power, and to convert the chopped power to a welding output is provided. The provided welding power supply includes a pulse width modulated (PWM) digital controller including gate drive circuitry that generates a PWM output signal that controls the switching of the one or more power semiconductor switches. The PWM output signal includes a duty cycle term corrected for one or more sources of error in the welding system. | 12-09-2010 |
20100308027 | SYSTEMS AND DEVICES FOR DETERMINING WELD CABLE INDUCTANCE - Systems, devices, and methods for measuring a peak to peak switching ripple in a voltage present on welding output terminals are provided. The systems, devices, and methods may also be utilized to determine, during a welding operation, a weld cable inductance based on the measured peak to peak voltage ripple. | 12-09-2010 |
20110163072 | SYSTEMS AND METHODS FOR STATISTICALLY ANALYZING WELDING OPERATIONS - A welding system including a welding power source including power conversion circuitry adapted to receive primary power and to convert the primary power to a weld power output for use in a welding operation and a controller communicatively coupled to the welding power source are provided. The controller is adapted to determine a statistical signature of at least one parameter of a welding process and to utilize the statistical signature to determine at least one of an electrode type, an electrode diameter, and a shielding gas type during the welding operation. | 07-07-2011 |
20110220620 | WELDING POWER SUPPLY WITH REGULATED BACKGROUND POWER SUPPLY - Embodiments of a welding power supply including a main power supply and a background power supply are provided. The main power supply includes a first transformer that supplies a first power output to welding electrodes for use in a welding operation. The background power supply includes a secondary transformer that charges an energy storage device to a regulated voltage level and is adapted to discharge the energy storage device by a controlled amount to supply a second regulated power output to the welding electrodes for use in the welding operation when a transient voltage event occurs. | 09-15-2011 |
20120241417 | WELDING POWER SUPPLY WITH CONTROLLED AUXILIARY POWER - A system includes a welding power supply unit and control circuitry. The welding power supply unit includes an auxiliary power supply configured to supply power to an auxiliary power load connected to the auxiliary power supply. The control circuitry is configured to detect a voltage received by the auxiliary power load from the auxiliary power supply, compare an output voltage generated by the auxiliary power supply with the voltage received by the auxiliary power load, and apply a correction factor to the output voltage from the auxiliary power supply based at least in part on the comparison of the output voltage generated by the auxiliary power supply and the voltage received by the auxiliary power load. | 09-27-2012 |
20130256290 | WELDING POWER SUPPLY WITH DIGITAL CONTROL OF DUTY CYCLE - A welding power supply including power conversion circuitry adapted to receive a primary source of power, to utilize one or more power semiconductor switches to chop the primary source of power, and to convert the chopped power to a welding output is provided. The provided welding power supply includes a pulse width modulated (PWM) digital controller including gate drive circuitry that generates a PWM output signal that controls the switching of the one or more power semiconductor switches. The PWM output signal includes a duty cycle term corrected for one or more sources of error in the welding system. | 10-03-2013 |
20140021180 | Method and Apparatus For Providing Welding Type Power - A welding-type power supply includes a controller, a preregulator, a preregulator bus, and an output converter. The controller has a preregulator control output and an output converter control output. The preregulator receives a range of inputs voltages as a power input, and receives the preregulator control output as a control input, and provides a preregulator power output signal. The preregulator includes a plurality of stacked boost circuits. The preregulator bus receives the preregulator output signal. The output converter receives the preregulator bus as a power signal and receives the output converter control output as a control input. The output converter provides a welding type power output, and includes at least one stacked inverter circuit. | 01-23-2014 |
20140061176 | WELDING WIRE FEED SPEED CONTROL SYSTEM AND METHOD - A welding system is disclosed in which the rate of advancement of wire electrode is determined automatically. The device can include a control circuit that determines the rate of advancement of the wire electrode in response to a signal from the voltage selection device of the welding system. Depending upon the operator selected voltage which is selected via the voltage selection device, the control circuit will determine the appropriate rate of wire electrode advancement and control the advancement mechanism (e.g., electric motor) accordingly. Linking of the voltage level and wire-feed speed controls facilities easy of use for more novice operators and, furthermore, facilitates single-handed adjustment of two operational parameters during a welding process. | 03-06-2014 |
20140158670 | WELDING POWER SUPPLY WITH DIGITAL CONTROLLER - A welding power supply including power conversion circuitry adapted to receive a primary source of power, to utilize one or more power semiconductor switches to chop the primary source of power, and to convert the chopped power to a welding output is provided. The provided welding power supply includes a pulse width modulated (PWM) digital controller including gate drive circuitry that generates a PWM output signal that controls the switching of the one or more power semiconductor switches. The PWM output signal includes a duty cycle term corrected for one or more sources of error in the welding system. | 06-12-2014 |
20140251970 | SYSTEMS AND METHODS FOR STATISTICALLY ANALYZING WELDING OPERATIONS - A welding system including a welding power source including power conversion circuitry adapted to receive primary power and to convert the primary power to a weld power output for use in a welding operation and a controller communicatively coupled to the welding power source are provided. The controller is adapted to determine a statistical signature of at least one parameter of a welding process and to utilize the statistical signature to determine at least one of an electrode type, an electrode diameter, and a shielding gas type during the welding operation. | 09-11-2014 |
20140374397 | Method and Apparatus For Providing Welding Type Power - A welding-type power supply includes a controller, a preregulator, a preregulator bus, and an output converter. The controller has a preregulator control output and an output converter control output. The preregulator receives a range of inputs voltages as a power input, and receives the preregulator control output as a control input, and provides a preregulator power output signal. The preregulator includes a plurality of stacked boost circuits. The preregulator bus receives the preregulator output signal. The output converter receives the preregulator bus as a power signal and receives the output converter control output as a control input. The output converter provides a welding type power output, and includes at least one stacked inverter circuit. | 12-25-2014 |
20150053660 | Method and Apparatus For Providing Welding Type Power With Flux Balancing - A welding-type power supply includes a controller, a preregulator, a preregulator bus, and an output converter. The controller has a preregulator control output and an output converter control output. The controller has a converter control output connected to the control input, and a flux balancing module. The converter control output is responsive to the flux balancing module such that the flux in the transformer remains balanced. | 02-26-2015 |
20150053661 | WELDING POWER SUPPLY WITH DIGITAL CONTROLLER - A welding power supply including power conversion circuitry adapted to receive a primary source of power, to utilize one or more power semiconductor switches to chop the primary source of power, and to convert the chopped power to a welding output is provided. The provided welding power supply includes a pulse width modulated (PWM) digital controller including gate drive circuitry that generates a PWM output signal that controls the switching of the one or more power semiconductor switches. The PWM output signal includes a duty cycle term corrected for one or more sources of error in the welding system. | 02-26-2015 |
20150060426 | Method and Apparatus For Providing Welding Type Power With Balanced Bus - A welding-type power supply includes a controller, bus (that can, but need not be preregulated), and an output converter. The controller has a preregulator control output and an output converter control output. The controller may receive bus feedback indicative of a plurality of bus voltages. A bus voltage balancing module in the converter includes a scaled correction module responsive to the bus feedback signal, and the converter control output is responsive to the bus voltage balancing module. The controller may receive load feedback indicative of a load output, have a bus voltage balancing module that includes a load proportional gain module responsive to the load. | 03-05-2015 |