Abstract: A laser and cutting machining apparatus includes a laser cutting device, and the laser cutting device includes a housing, a guide plain shaft, and a machining mechanism. The guide plain shaft is arranged in the housing, and the machining mechanism includes a laser shell slidably connected to the guide plain shaft, a laser device arranged in the laser shell, and a cutter mechanism arranged in the laser shell; the laser device and the cutter mechanism is movable with the laser shell along the guide plain shaft relative to the housing. The laser and cutting machining apparatus integrates the laser device and the cutter mechanism, is simple and convenient to operate, and can perform laser engraving and cutter cutting on a workpiece by a laser or a cutter, thereby achieving the tabletop and miniaturized configuration of the laser and cutting machining apparatus.

Abstract: DC/DC converter has a transformer having primary coils connected to an input side and secondary coils connected to an output side. Each primary coil connects a full-bridge circuit comprising two switches on two legs, the primary coil being connected between the switches on each leg, each full-bridge circuit being connected in parallel wherein each leg is disposed parallel to one another, and the secondary coils connected to a rectifying circuit. An outer loop control circuit that reduces ripple in a voltage reference has a first resistor connected in series with a second resistor connected in series with a first capacitor which are connected in parallel with a second capacitor. An inner loop control circuit that reduces ripple in a current reference has a third resistor connected in series with a fourth resistor connected in series with a third capacitor which are connected in parallel with a fourth capacitor.