Submerged arc welding power supply alternating and direct current square wave controller

Abstract

The invention discloses a submerged arc welding power supply alternating and direct current square wave controller and belongs to a power supply controller for submerged arc welding. The submerged arc welding power supply alternating and direct current square wave controller comprises a main control module, an IGBT (Insulated Gate Bipolar Transistor) driving module and an inverter module; the main control module is accessed to the IGBT driving module and a power input terminal of the controller; the IGBT driving module is accessed to the inverter module; the inverter module is accessed to a power output terminal of the controller and mainly comprises a full-bridge inverter circuit which is formed by a plurality of IGBTs which are in parallel connection with each other. According to the submerged arc welding power supply alternating and direct current square wave controller, voltage and current pulse width modulation control is performed on the IGBTs which are arranged in the inverter circuit and the frequency of a welded square wave and the positive and negative balance ratio of an output electrode are adjusted through the independent main control module and accordingly the adjustable range of the positive and negative balance ratio of the controller is wide and the control on the output current and voltage is accurate; various types of fault detection can be performed on an input power supply of the controller through the main control module; the controller can be matched with the existing direct current submerged arc welding power supply so as to achieve submerged arc welding functions of alternating and direct current function selection and square wave frequency control.

Description

technical field

[0001] The invention relates to a power controller for submerged arc welding, more specifically, the invention mainly relates to an AC and DC square wave controller for a submerged arc welding power source. Background technique

[0002] Submerged arc welding is a kind of welding equipment with high degree of automation, high production efficiency, good weld formation and no arc radiation. It is widely used in thick plates in bridges, boilers, shipbuilding, petrochemical, marine engineering, nuclear industry and other fields. welding. At present, most of the submerged arc welding used in various industries adopts high-power DC power supply, most of which have magnetic deflection blowing phenomenon, and it is difficult to adjust and control the penetration depth and deposition rate. With the improvement of the domestic submerged arc welding process, many new submerged arc welding processes have been derived in order to increase the depth of fusion and improve ...

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