摘要:
A method and apparatus for providing welding type power, including a power and control circuit is disclosed. The power circuit provides welding, control and aux power. The control and aux power are provided with a transformer, and secondary windings for control and aux power are wound on a single bobbin, with a winding separator separating them. Air vents, which can be formed by fins on the bobbin or separator allow cooling of the inner winding.
摘要:
A welding system includes a power supply coupled to a power source and configured to receive a power signal. The power supply includes power conversion circuitry having one or more silicon-controlled rectifiers (SCRs) and configured to rectify the power signal to generate a DC signal for use in providing welding power. The welding system also includes an SCR detection system configured to receive a signal indicative of an inductor current of the DC signal and a signal indicative of a voltage of the DC signal. The SCR detection system is further configured detect a non-firing, open, or shorted SCR in the one or more SCRs based on the inductor current and the welding voltage of the DC signal.
摘要:
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.
摘要:
A system includes an engine configured to drive a generator to produce a first power output, and a first inverter communicatively coupled to the generator. The first inverter is configured to convert the first power output into a second power output. The system includes a second inverter communicatively coupled to the generator. The second inverter is configured to convert the first power output into a third power output. The third power output includes a welding power output.
摘要:
A welding wire feeder includes a wire feed drive and wire feed control circuitry coupled to the wire feed drive to control the drive of welding wire towards the welding application. The welding wire feeder further includes power conversion circuitry configured to receive input power and to convert the input power to welding output suitable for a welding application, output voltage sensors configured to measure output voltage, output current sensors configured to measure output current, and control circuitry coupled to the power conversion circuitry and to the output voltage and current sensors. The power conversion circuitry includes power storage circuitry configured to store energy and to discharge at least a portion of the stored energy during an overdraw event. The control circuitry is configured to control the output current during the overdraw event to maintain a stored energy value of the power storage circuitry greater than a desired minimum energy value.
摘要:
A power supply for welding, cutting and similar operations includes a dual two-switch forward converter. The converter has two inverter circuits coupled in parallel but controlled to provide output power in an interleaved fashion. To avoid walking of the circuits (which could result in different duty cycles and imbalance of the load sharing), control signals are determined and applied to a first of the inverter circuits, and on times of the first circuit is monitored, such as by augmenting a counter to determine the number of clock cycles the first circuit is on. The same duration is then used for commanding output from the second inverter circuit. The duty cycles of both circuits is thus ensured to be the same regardless of changes in the total output power.
摘要:
A system (10) for and method of automatic detection of a connection of a spool gun (24) to a welding system (10). In addition to automatically detecting connection of the spool gun (24), a method is provided for controlling the operation of the welding system (10) based on the detection of the spool gun (24).
摘要:
A system (1) and method to make a welder aware of contact tip-to-work distance (CTWD) during a welding process. One or both of welding output current and wire feed speed (WFs) is sampled in real time during the welding process. The actual CTWD is determined in real time based on at least one or both of the sampled welding output current and wire feed speed. The actual CTWD may be compared to a target CTWD in real time, where the target CTWD represents an estimated or desired CTWD for the welding process. A deviation parameter may be generated based on the comparing. An indication of the deviation parameter or the actual CTWD may be provided to a welder performing the welding process as feedback, allowing the welder to adjust the actual CTWD to better match the target CTWD in real time during the welding process.
摘要:
A method and apparatus for providing welding type power is disclosed. A welding type power supply includes an input circuit, a controller and an output circuit. The input circuit receives an input power signal and provides an intermediate power signal. The output circuit receives the intermediate power signal and provides a welding type power output. The output circuit has an inverter with at least two inverter switches, and a clamp circuit that limits the voltage across the inverter. The clamp circuit captures and buffers the excess energy, and returns the excess energy to an input of the inverter over a plurality of switching cycles. The controller has control outputs connected to the input circuit and the output circuit, to control them.
摘要:
A system (100) and method is provided. The system (100) includes a first power supply (130, 135) that outputs a welding current that includes welding pulse currents and a background welding current. The system (100) also includes a second power supply (130, 135) 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 (100) also in¬ cludes a controller (195) 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 (110) relative to a molten puddle (112) based on magnetic fields created by the welding current and the heating current.