Abstract: A first drive circuit is connected to a first end of a primary winding of a pulse transformer. A second drive circuit is connected to a second end of the primary winding of the pulse transformer. A voltage clamp unit clamps a voltage of a semiconductor element at a specified voltage when a voltage output from a secondary winding of the pulse transformer is negative. A current detection circuit detects current flowing through the semiconductor element and outputs a detection signal. A control circuit controls the first drive circuit and the second drive circuit based on the detection signal. A current limiting circuit imposes a limit on current flowing through the primary winding of the pulse transformer based on the detection signal.

Abstract: A first drive circuit is connected to a first end of a primary winding of a pulse transformer. A second drive circuit is connected to a second end of the primary winding of the pulse transformer. A voltage clamp unit clamps a voltage of a semiconductor element at a specified voltage when a voltage output from a secondary winding of the pulse transformer is negative. A current detection circuit detects current flowing through the semiconductor element and outputs a detection signal. A control circuit controls the first drive circuit and the second drive circuit based on the detection signal. A current limiting circuit imposes a limit on current flowing through the primary winding of the pulse transformer based on the detection signal.

Abstract: A laser beam generation device includes power supply units, LD modules, a combiner, and a control device. The LD modules receive currents from the power supply units, and output laser beams. The combiner collects the laser beams and outputs one laser beam. The control device generates control signals such that power of the laser beam becomes a laser output setting value and such that the currents become current command values. Phases of pulses of the control signals are shifted from each other by 60 degrees.

Abstract: A laser processor includes a laser oscillator housed in a closed housing, an oscillator controller that controls the laser oscillator and is supplied with electric power by a first primary power supply, a dehumidifier that is housed in the closed housing and operates using electric power supplied from a second primary power supply, and a dehumidification controller that controls the dehumidifier and is supplied with electric power by the second primary power supply.

Abstract: A laser device, including multiple laser modules, includes a plurality of drive power units that drive the laser modules, a plurality of output detection units that detect laser outputs from the laser modules, and output detected values as first output signals, a coupled output detection unit that detects a total laser output after coupling of a plurality of the laser outputs, and outputs a detected value as a second output signal, a computing unit that sets multiple output correction factors for correspondingly controlling the laser modules using the plurality of first output signals and the second output signal, and a control unit that controls the plurality of drive power units using the multiple output correction factors. The multiple output correction factors are each set to allow the total laser output to be maintained at a constant value.

Abstract: A laser device, including multiple laser modules, includes a plurality of drive power units that drive the laser modules, a plurality of output detection units that detect laser outputs from the laser modules, and output detected values as first output signals, a coupled output detection unit that detects a total laser output after coupling of a plurality of the laser outputs, and outputs a detected value as a second output signal, a computing unit that sets multiple output correction factors for correspondingly controlling the laser modules using the plurality of first output signals and the second output signal, and a control unit that controls the plurality of drive power units using the multiple output correction factors. The multiple output correction factors are each set to allow the total laser output to be maintained at a constant value.

Abstract: A consumable electrode type arc welding method for generating arc between a plate-shaped work and a welding wire by a mixed shield gas including argon gas to weld the plate-shaped work, includes: making a state of reverse polarity in which the polarity of the welding wire is positive at the welding start time, and switching at least once to a state of positive polarity in which the polarity of the welding wire is negative.

Abstract: A consumable electrode type arc welding method for generating arc between a plate-shaped work and a welding wire by a mixed shield gas including argon gas to weld the plate-shaped work, includes: making a state of reverse polarity in which the polarity of the welding wire is positive at the welding start time, and switching at least once to a state of positive polarity in which the polarity of the welding wire is negative.