igbt full bridge inverter circuit

Abstract

The invention discloses an IGBT full-bridge inverter peak absorbing circuit, which includes a positive input terminal and a negative input terminal, and also includes a switch module for controlling the breaking of the peak absorbing circuit; a sampling comparison module for controlling the switch module, sampling One end of the comparison module is connected to the control end of the switch module, and the other end is connected to the positive input end; and a peak absorption module, the peak absorption module and the switch module are connected in series between the positive input end and the negative input end. Also disclosed is an IGBT full-bridge inverter circuit comprising the above-mentioned peak absorbing circuit. The above-mentioned circuit is reliable and stable, and has high efficiency.

Description

technical field [0001] The invention relates to the technical field of inverter power supplies, in particular to an IGBT full-bridge inverter circuit. Background technique [0002] Argon arc welding has unique advantages in welding non-ferrous metals and their alloys, high-temperature alloys, titanium and titanium alloys and other materials. With the rapid development of non-ferrous metals in today's industry, aluminum-magnesium and its alloys, copper and its alloys and titanium The proportion of non-ferrous metals such as non-ferrous metals and their alloys in industrial production is increasing, so people's demand for argon arc welding power supplies, especially AC and DC argon arc welding power supplies, is also increasing. [0003] The IGBT full-bridge inverter circuit is widely used in AC and DC argon arc welding power sources. When the IGBT is alternately turned off, the inverter circuit will generate high-voltage spikes that are harmful to the welding machine. If it i...

AI Technical Summary

Problems solved by technology

[0003] The IGBT full-bridge inverter circuit is widely used in AC and DC argon arc welding power sources. When the IGBT is alternately turned off, the inverter circuit will generate high-voltage spikes that are harmful to the welding machine. If it is not handled properly, it will seriously affect the stability of the welding power source. and power welding performance

[0004] For the absorption of high-voltage spikes, most power supplies use high-power resistors and capacitors as absorption components, but this solution has low efficiency, high cost, and takes up a lot of space.

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