Welding source and ac-dc argon arc welding machine

Abstract

The present invention belongs to the technical field of argon arc welding machine, and particularly refers to a welding power supply and an AC-DC argon arc welding machine. The welding power comprises a rectifying and wave-filtering unit, a first inverter unit, a transformer and a hybrid inverter unit connected one by one; the hybrid inverter unit has an unitized structural design that combines a rectifying function with a secondary inverting function through an IGBT or an IGBT half-bridge module integrated internally with FRDs; in this way, not only the types and the number of power devices are reduced, but also a difficulty of wire arrangement of an electric board is reduced, and a condition that power switches work under unbalanced state when the welding machine outputs DC is avoided, so that some problems such as a high power consumption of a traditional circuit structure, a big heat sink and a big fan, a high cost, and a complicated wire arrangement, and so on are solved, and a goal of reducing a weight and a volume of the welding machine, and the cost, and improving a welding effect is achieved.

Dependencies are inferred from the claim text.