Full-digital dual-inverter alternating magnetic control arc generation device

Abstract

The invention discloses a full-digital dual-inverter alternating magnetic control arc generation device, which comprises a magnetic control arc excitation power supply and an excitation coil, wherein the magnetic control arc excitation power supply consists of a dual-inverter main circuit and a full-digital control system; the dual-inverter main circuit is formed by orderly connecting a single-phase rectifying and filtering module, a primary high-frequency inverter module, a transformer rectifier module and a secondary inverter module which access a single-phase alternating current input power supply; the full-digital control system is formed by interconnecting an abnormity detection and protection module, a sampling detection module, an ARM microprocessor system, a primary high-frequency driving module and a secondary driving module; and the excitation coil mainly comprises a carbon steel pipe, a plurality of strands of lacquered wires, a fixed bracket and the like. Full-digital control on the dual-inverter alternating magnetic control arc generation device can be realized, so the device has better consistency, dynamic response performance, good process adaptability, high energy conversion efficiency and strong expandability.

Description

technical field [0001] The invention relates to a magnetically controlled arc generating device, in particular to an all-digital double-inversion alternating magnetically controlled arc generating device. Background technique [0002] With the development of material science and engineering technology, various new welding processes are emerging, and the introduction of magnetic field control in the welding process has become a developing advanced welding technology, which is called magnetron arc welding technology. Since the early 1960s, when Brown and others first studied the influence of electromagnetic stirring in the welding of stainless steel, titanium alloy and aluminum alloy, and discovered the phenomenon of grain refinement, scholars at home and abroad began to extensively study the influence of external magnetic field on welding quality. Research. In the 1970s and 1980s, foreign scholars conducted a lot of research on the interaction between magnetic field and arc....

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Problems solved by technology

The DC output current has certain limitations; the sine wave AC mostly adopts R-L-C oscillating circuit or double T network, which is difficult to adjust the magnetic control parameters and cannot be adjusted continuously; the square wave AC adopts thyristor-reactor circuit or double T network The former is based on a thyristor interrupter and a two-way time regulator according to a typical basic circuit. The reliability of the device is poor, and the circuit design is more complicated. The pulse duty ratio and pulse frequency The adjustment range is small, and the zero-crossing time is longer in the positive and negative half-cycle conversion process, and the latter is shorter, but they are mainly in hard switching mode, in the stage of analog control or relatively basic digital control

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