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Inverter welding machine major loop with PFC (Power Factor Correction) function

A technology of inverter welding machine and main circuit, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of increased cost of electric welding machine products and lack of competitiveness of products, so as to reduce product failure rate, simple design, cost reduction effect

Active Publication Date: 2011-10-19
SHENZHEN JASIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The known technology is to add a power factor compensation device on the basis of conventionally produced technical products, or to make a simple topology of the two to form a product that looks like a machine. This solution has no technical problems , the problem lies in the cost, often adding the PFC function will lead to a great increase in the cost of the welding machine product, and the product lacks competitiveness

Method used

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  • Inverter welding machine major loop with PFC (Power Factor Correction) function
  • Inverter welding machine major loop with PFC (Power Factor Correction) function

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Embodiment Construction

[0009] The present invention will be further described below in conjunction with the accompanying drawings of the description.

[0010] Such as figure 1 As shown, the main circuit of an inverter welding machine with PFC function, the three-phase power supply forms positive and negative poles after passing through the three-phase rectification circuit, and the positive and negative pole signals are transmitted to the primary two ends of the transformer T1 after passing through the PFC circuit; the transformer The positive pole of the secondary of T1 passes through the diode D10, the switch SW2, and the reactor L4 in sequence, and then outputs; there are three parallel capacitors C1, C2, and C3 between the diode D10 and the switch SW2, and the capacitors C1, C2, and C3 are connected in parallel to the transformer T1 The positive and negative ends of the secondary; a diode D11 and a capacitor C5 are provided between the switch SW2 and the reactor L4, and the diode D11 and the cap...

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Abstract

The invention discloses an inverter welding machine major loop with a PFC (Power Factor Correction) function. Three-phase alternating current is rectified by a three-phase rectifier circuit composed of diodes D1-D6; a PFC circuit carries out waveform adjustment; a direct-current voltage is transmitted to capacitors C2-C4 mutually connected in parallel by a diode D10 by virtue of the isolation action of a transformer T1 while the requirement of PFC is achieved; a voltage on the capacitors C2-C4 are subjected to DC-DC (direction current-direct current) transform by virtue of a switch SW2; and the voltage is lowered to a voltage suitable for welding so as to be output by an output inductor L4. The design of the circuit of the inverter welding machine major loop is simplified, a residual circuit form is reduced, the product cost is greatly lowered, and the product failure rate is lowered on the basis.

Description

technical field [0001] The invention relates to the field of welding machines, in particular to the main circuit of an inverter welding machine with PFC function. Background technique: [0002] The full name of PFC in English is "Power Factor Correction", which means "power factor correction". Power factor refers to the relationship between effective power and total power consumption (apparent power), that is, effective power divided by total power consumption Quantity (apparent power) ratio. Basically, the power factor can measure the degree to which electricity is effectively utilized. When the power factor value is larger, it represents the higher the power utilization rate. The traditional PFC circuit has two types of isolation and non-isolation. The traditional electric welding machine has the control method of isolation / step-down-external characteristic control. Variable power supply or isolation + traditional inverter power supply products. The known technology is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/10
Inventor 蔡立民刘振光萧波
Owner SHENZHEN JASIC TECH
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