A high-frequency high-voltage arc starter

Abstract

The invention discloses a high-frequency high-voltage arc striker, the high-frequency high-voltage arc striker comprises: a rectification filter circuit 1, a drive module 2, a step-up power electronic transformer 3, and a high-frequency high-voltage oscillation circuit 4; The input of the rectifying and filtering circuit 1 is a high-frequency AC voltage, and the output is a stable DC voltage; the two-way driving signals of the driving module 2 are controlled by the external control terminal to start and stop; the two-way driving signals of the driving module 2 have a dead zone The driving signal with a fixed duty ratio and frequency respectively drives the upper bridge arm and the lower bridge arm of the half-bridge LLC resonant converter in the step-up power electronic transformer 3; the step-up power electronic transformer 3 realizes the output of high-frequency AC High voltage; the high-frequency high-voltage oscillating circuit 4 realizes high-frequency oscillation and boosts the voltage; the present invention overcomes the shortcomings of traditional high-frequency high-voltage arc starters, and has the advantages of small size, light weight, flexible control, strong arc starting power, and responsive High speed, high occupancy rate and good reliability.

Description

technical field [0001] The invention relates to the field of power electronics technology and its application, in particular to a high-frequency and high-voltage non-contact arc starting device suitable for argon arc welding power supply. Background technique [0002] Argon arc welding power supply is a non-melting electrode gas shielded welding equipment, which can weld carbon steel, stainless steel, aluminum, aluminum-magnesium alloy, copper and other metal materials, and is widely used in pressure vessels, medical equipment, high-speed railway equipment, etc. The field of industrial manufacturing and production plays an important role in my country's equipment manufacturing industry. The arc starting operation of the argon arc welding power supply is divided into non-contact arc starting and contact arc starting. In order to avoid contamination of the workpiece by the tungsten needle of the welding torch, in most applications, the argon arc welding power source uses a high...

AI Technical Summary

Problems solved by technology

The traditional high-frequency high-voltage arc starter mainly has two schemes: one is composed of a power frequency high-leakage resistance step-up transformer and an oscillating circuit, such as the patent "A High-frequency Arc Starter Used with an Inverter Welding Machine (Patent No. ZL96247049.x)", its advantages are strong high-frequency arc ignition power and good reliability; the disadvantages are low load rate, large volume and weight of industrial frequency transformers, and high cost, which affects the quality of components in the oscillating circuit The requirements are higher; another solution is to use a flyback converter and an oscillating circuit with a high-voltage package, such as the patent "High-frequency arc starter for inverter welding machine (patent No. ZL02283471.0)" and the patent "Based on high-voltage discharge High-frequency arc striker for protectors (authorized announcement number CN 203304744U)", which has the advantages of small size and low cost, and the disadvantages of low arc strike power and poor reliability

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