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Method of minimizing harmonic loading by a welding power source and welding power source implementing the method

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

Inactive Publication Date: 2017-04-12
LORCH SCHWEISSTECHNIK GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 of minimizing harmonic loading by a welding power source and welding power source implementing the method
  • Method of minimizing harmonic loading by a welding power source and welding power source implementing the 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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Abstract

A method for minimizing harmonic load by a welding power supply and a welding power supply for implementing the method, the method minimizes the harmonic load of a single-phase AC voltage source by a welding power supply, the welding power supply has a first rectification circuit, passive power factor correction circuit, a clock bridge circuit, a resonant converter and a second rectification circuit, the resonant converter has a transformer and an oscillating circuit with a first capacitor and a first inductor. The second capacitor and / or the second inductor are connected in parallel to the transformer, the ratio of the first capacitor to the second capacitor is a value selected from the range of 1 to 10 when the second capacitor is arranged on the primary side, and when the second capacitor is arranged on the secondary side In the case of the primary side, the quotient of a value selected from the range 1 to 10 and the square of the transformation ratio of the transformer, the ratio of the second inductor to the first inductor is selected from 0.5 to 10 in the case of the second inductor being arranged on the primary side The value of the range, in case the second inductor is arranged on the secondary side, is the quotient of a value selected from the range of 0.5 to 10 and the square of the transformation ratio of the transformer.

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 Patents(China)
IPC IPC(8): B23K9/10
CPCH02M1/4266H02M3/3353B23K9/105H02M1/007Y02B70/10Y02P70/10Y02P80/10
Inventor 赫伯特·艾格纳
Owner LORCH SCHWEISSTECHNIK GMBH
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