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Optimization structure based on inverter welding machine main circuit

A technology of inverter welding machine and optimized structure, which is applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve problems such as IGBT module overvoltage failure, achieve the effect of reducing wire length, reducing inductance, and optimizing layout space

Inactive Publication Date: 2012-10-17
嘉兴斯达微电子有限公司
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0005] This induced voltage V L The voltage V that will be superimposed on the DC busbar DC , so that the peak voltage of the DC bus increases to V DC '=V L +V DC , if the peak voltage V at this time DC 'Exceeding the breakdown voltage V(BR)ces of the IGBT module, the IGBT module may fail due to overvoltage

Method used

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  • Optimization structure based on inverter welding machine main circuit
  • Optimization structure based on inverter welding machine main circuit
  • Optimization structure based on inverter welding machine main circuit

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] As shown in the figure, the present invention includes a main circuit, which includes a snubber capacitor 2 , two IGBT modules 3 , a rectifier module 4 , a low-inductance busbar 5 and a gate drive line 6 . Snubber capacitor 2, two IGBT modules 3, rectifier module 4, and low-inductance busbar 5 are placed on the heat sink 1 in a compact structure, and the snubber capacitor 2 is directly connected to the IGBT module 3 by its pins to ensure that the snubber capacitor is connected to the circuit Shortest effect for optimal absorption. The two IGBT modules 3 and the rectifier module 4 are directly connected by a low-inductance busbar 5, which ensures the shortest connection distance and reduces parasitic inductance. The gate drive line 6 uses a twisted pair; the lead wire 7 is drawn from one side of the transformer. The input leads 8 are co...

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Abstract

The invention discloses an optimization structure based on an inverter welding machine main circuit. The optimization structure comprises a main circuit, wherein the main circuit comprises an absorption capacitor, an IGBT (Insulated Gate Bipolar Transistor) module, a rectification module, a low-inductance busbar and a gate pole driving line, wherein the absorption capacitor, the IGBT module, the rectification module and the low-inductance busbar are arranged on a radiator by virtue of a compact structure, the absorption capacitor is connected to the IGBT module by directly utilizing a pin, thus ensuring the shortest effect of connection of the capacitor and the circuit and optimizing the absorption action; and the IGBT module and the rectification module are connected directly by virtue of the low-inductance busbar, thus ensuring the shortest connection distance and reducing the parasitic inductance.

Description

technical field [0001] The invention relates to performance optimization of an inverter welding machine, in particular to an optimized structure based on the main circuit of the inverter welding machine. Background technique [0002] The inverter welding machine with IGBT module as the core has become the mainstream product in the modern welding machine industry. With the requirements of the development of inverter welding machine technology, the miniaturization of welding machines has become an inevitable trend. In the process of miniaturization, how to arrange the layout reasonably and further increase the switching speed has become the focus of research, but in the process of increasing the switching speed In , the parasitic inductance effect of the DC bus is amplified. [0003] During the IGBT turn-off process, there will be a di / dt process, and the voltage spike generated during this process is proportional to the size of the parasitic inductance. Assuming that the par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/10
Inventor 戴志展陈浩
Owner 嘉兴斯达微电子有限公司
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