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Reactive compensation intelligent capacitor special for electric welding machine

A capacitor and welding machine technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation and other directions, can solve problems such as large line loss, wrong switching instructions, short load time, etc.

Inactive Publication Date: 2014-11-26
山东哈雷电力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Normally, after the AC welding machine turns on the power switch, no matter whether it is welding or not, there will always be current flowing through the primary side coil. The power factor is only 0.2 when it is no-load, and only 0.4-0.5 when it is in use. The loss of the line is large, and the waste of electric energy is serious.
During the use of AC welding machines, the load changes frequently and quickly, and the shortest loading time is less than 1S. The existing reactive power compensation equipment only detects and compensates the power on one-phase power supply, while the power supply of the welding machine is connected to Between the two-phase power supply, the line voltage is used, and the power factor of the equipment cannot be accurately calculated, so that the switching command cannot be issued accurately, and the wrong switching command is often given, resulting in the lower power factor of the power factor. The phenomenon
A small number of companies that understand the characteristics of electric welding machines have taken some simple measures to compensate for reactive power. Although it has some effect, it is a drop in the bucket and cannot solve the fundamental problem.
At the same time, because of the switching speed, it is impossible to achieve revolutionary changes in the fundamental sense.

Method used

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  • Reactive compensation intelligent capacitor special for electric welding machine
  • Reactive compensation intelligent capacitor special for electric welding machine
  • Reactive compensation intelligent capacitor special for electric welding machine

Examples

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Effect test

Embodiment 1

[0024] Embodiment 1: as figure 1 As shown, the special reactive power compensation intelligent capacitor for electric welding machine of the present invention includes electric welding machine 1, is provided with electric welding machine intelligent capacitor 2, and the power supply input end of electric welding machine intelligent capacitor 2 is connected to two power supply terminals of electric welding machine 1, The two signal acquisition terminals of the smart capacitor 2 of the welding machine are connected to the power supply terminal of the welding machine 1 through the voltage transformer 3 and the current transformer 4 respectively.

Embodiment 2

[0025] Embodiment 2: on the basis of the structure described in embodiment 1, as figure 2 As shown, the welding machine smart capacitor 2 is provided with a capacitor 5 and a switching element 6, the capacitor 5 is connected to the two-phase power supply through the switching element 6, and a zero-crossing comparison circuit 7 is provided, and the two zero-crossing comparison circuits 7 The input terminal is connected to a power supply input terminal of the target electric welding machine 1 and between the switching element 6 and the power supply through the current transformer 4 and the voltage transformer 3 respectively, and the output terminal of the zero-crossing comparison circuit 7 is connected to the 8 I / O pin of the single-chip microcomputer , another I / O pin of the microcontroller 8 is connected to the input end of the switching element 6 .

Embodiment 3

[0026] Embodiment 3: On the basis of the structure described in Embodiment 2, the two-phase power supply connected to the capacitor 5 through the switching element 6 is the same as the two-phase power supply connected to the two power supply terminals of the target electric welding machine 1, and the capacitor 5 includes 1.7kvar capacitors, 2.5kvar capacitors, 3kvar capacitors and 5kvar capacitors, 1.7kvar capacitors, 2.5kvar capacitors, 3kvar capacitors and 5kvar capacitors are respectively connected to the two-phase power supply through the switching element 6, and the input terminals of each switching element 6 are connected to There are two 1.7kvar capacitors, 2.5kvar capacitors, 3kvar capacitors and 5kvar capacitors for different I / O pins of the single-chip microcomputer 8 respectively.

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Abstract

The invention provides a reactive compensation intelligent capacitor special for an electric welding machine, and belongs to the field of electric welding machine compensating capacitors. The reactive compensation intelligent capacitor comprises the electric welding machine and is provided with an electric welding machine intelligent capacitor body. The power input end of the electric welding machine intelligent capacitor body is connected to the two power ends of the electric welding machine, and the two signal acquisition ends of the electric welding machine intelligent capacitor body are connected to the power ends of the electric welding machine through a voltage transformer and a current transformer respectively. According to the reactive compensation intelligent capacitor, reactive compensation can be carried out on the electric welding machine well, and the electric welding machine of any type and any reactive loss degree can be compensated for according to the reactive power shortage.

Description

technical field [0001] The invention provides a reactive power compensation intelligent capacitor dedicated to electric welding machines, which belongs to the field of compensation capacitors for electric welding machines. Background technique [0002] Normally, when the power switch of the AC welding machine is turned on, no matter whether it is welding or not, there will always be current flowing through the primary side coil. The power factor is only 0.2 when it is no-load, and only 0.4-0.5 when it is in use. The loss of the line is large and the waste of electric energy is serious. During the use of AC welding machines, the load changes frequently and quickly, and the shortest loading time is less than 1S. The existing reactive power compensation equipment only detects and compensates the power on one-phase power supply, while the power supply of the welding machine is connected to Between the two-phase power supply, the line voltage is used, and the power factor of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 张倩张士新
Owner 山东哈雷电力科技有限公司
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