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Method and device for operating a resistance welding device

A technology of resistance welding and triggering device, applied in welding power supply, welding power supply and other directions, can solve the problem of increased switching loss, and achieve the effects of small resistance, light weight, and less magnetization loss

Active Publication Date: 2012-07-11
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if the switching frequency is increased, the switching losses also increase when the semiconductor components required for this are activated by means of known pulse width regulation methods

Method used

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  • Method and device for operating a resistance welding device
  • Method and device for operating a resistance welding device
  • Method and device for operating a resistance welding device

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Embodiment Construction

[0025] Attached figure 1 An intermediate frequency welding transformer with a rectifier and a converter is schematically shown and is indicated by the reference numeral 10 as a whole. The device 10 can be divided into different components. The device has a primary circuit 13 and secondary circuits 11, 12, and these circuits are connected through a transformer 17 so that a common magnetic flux is generated in the windings of the primary circuit 13 and the secondary circuits 11, 12. The primary winding 13 with the number of turns of the transformer 17 N1 is connected to the primary loop, and the number of turns of the transformer 17 is respectively N 2 +N 3 The secondary windings 11, 12 are connected to the secondary loop. The transformer 17 also has a transformer core, but it is not shown here for the sake of clarity.

[0026] In the secondary circuits 11 and 12, there is an output area denoted by the reference numeral 19, and the welding electrode can be connected to the output ...

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PUM

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Abstract

The invention relates to a method for operating a resistance welding device (10). The polarity of the direct voltage (Up) and the number of drive pulses during a time period of the drive device (14) are varied, without changing the pulse width of the drive pulses from outside of the normal circuit tolerances. The method has contribute to reduce switching loss and install a transformer with smaller structure volume.

Description

Technical field [0001] The invention relates to a method and a device for operating a resistance welding device especially by means of a (single-phase) intermediate frequency welding transformer having a transformer core, a primary winding and a secondary winding. [0002] Although the following basically refers to an intermediate frequency welding transformer, the present invention is not limited to this. Background technique [0003] The intermediate frequency welding transformer has been applied to the welding process for a certain period of time, and a square wave alternating voltage is usually provided to the intermediate frequency welding transformer by a current commutator. The transformer outputs a low voltage with a higher current on its secondary winding, which is then rectified and used in the welding process. The operating frequency of the intermediate frequency transformer is high, and such a high frequency enables effective energy conversion and therefore the use of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K11/24
CPCB23K11/241
Inventor R·肖尔茨W·迈斯特
Owner ROBERT BOSCH GMBH
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