Method for minimized harmonic load of welding power supply and welding power supply for executing method

A welding power supply and harmonic technology, applied in welding equipment, high-efficiency power electronic conversion, energy industry, etc., to achieve the effects of small harmonic load, reduced production cost, and low-cost production

Inactive Publication Date: 2015-03-18
LORCH SCHWEISSTECHNIK GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it simultaneously has the disadvantage that the known welding power sources have to be considerably oversized in order to be able to guarantee a stable arc between the welding electrode and the workpiece
This comes with no small cost

Method used

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  • Method for minimized harmonic load of welding power supply and welding power supply for executing method
  • Method for minimized harmonic load of welding power supply and welding power supply for executing method

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Embodiment Construction

[0046] figure 1 A simplified circuit diagram of an advantageous embodiment of the welding power source according to the invention is schematically shown in FIG. The welding power source comprises two power supply connections 11 , 12 which can be connected to a single-phase AC voltage source, in particular to a public power supply network. The two supply connections 11 , 12 form the input of a first rectifier circuit 14 which, in the exemplary embodiment shown, is formed as a bridge rectifier. The single-phase AC voltage present at the supply connections 11 , 12 can be rectified by means of the first rectifier circuit 14 . In order to reduce the residual ripple of the rectified voltage, a power factor correction circuit 16 is connected to the first rectification circuit 14, said power factor correction circuit having a first current path 17 and a second current path 17 connected in parallel. A current path 18 in which a diode 19 or 20 and a capacitor 21 or 22 connected in ser...

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PUM

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Abstract

The invention provides a method for minimized the harmonic load of a welding power supply and a welding power supply for executing the method. According to the method, the harmonic load of a single-phase alternating current (AC) voltage source is minimized. The welding power supply comprises a first rectifier circuit, a passive power factor correction circuit, a clock bridge circuit, a resonant converter and a second rectifier circuit. The resonant converter comprises a transformer and an oscillation loop with a first capacitor and a first inductor. A second capacitor and/or a second inductor are connected in parallel with the transformer. The value ratio of the first capacitor to the second capacitor is between 1-10, when the second capacitor is arranged at the primary side. The value ratio of the first capacitor to the second capacitor is the quotient of the square of the transformer ratio that is between 1-10, when the second capacitor is arranged at the secondary side. The value ratio of the second capacitor to the first capacitor is between 0.5-10 when the second capacitor is arranged at the primary side. The value ratio of the second capacitor to the first capacitor is the quotient of the square of the transformer ratio that is between 0.5-10 when the second capacitor is arranged at the secondary side.

Description

technical field [0001] The invention relates to a method for minimizing the harmonic loading of a single-phase AC voltage source by means of a welding power source having a first rectifier circuit connectable to the AC voltage source, an output connected to the first rectifier circuit A passive power factor correction circuit connected to the power factor correction circuit, a clock bridge circuit connected to the output of the power factor correction circuit, a resonant converter connected to the output of the clock bridge circuit, and a resonant converter connected to the output of the resonant converter A second rectifier circuit, the welding electrode and the workpiece to be welded can be connected to the output of the second rectifier, wherein the resonant converter has a transformer and an oscillating circuit, the oscillating circuit has a first capacitor and is connected in series with the first A first inductor for a capacitor. [0002] Furthermore, the invention rela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/10
CPCH02M2001/007B23K9/1006H02M3/3353H02M1/4266B23K9/105H02M1/007Y02B70/10Y02P70/10Y02P80/10
Inventor 赫伯特·艾格纳
Owner LORCH SCHWEISSTECHNIK GMBH
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