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Compensation circuit for implementing contravariant welding machine electric power outputting current steadily

A power output and current stabilization technology, applied in the field of compensation circuits, can solve problems such as high cost, complex circuits, and easy introduction of interference

Active Publication Date: 2010-06-02
AOTAI ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the control of the output constant current of the known inverter welding machine requires Hall element or shunt sampling and feedback and PI adjustment, the circuit is complicated, it is easy to introduce interference, and the cost is high

Method used

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  • Compensation circuit for implementing contravariant welding machine electric power outputting current steadily
  • Compensation circuit for implementing contravariant welding machine electric power outputting current steadily
  • Compensation circuit for implementing contravariant welding machine electric power outputting current steadily

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] figure 1 , which includes the pulse width modulator U 1 1, Pulse Width Modulator U 1 The pulse output terminal of 1 is connected to the drive pulse filter circuit 2, the drive pulse filter circuit 2 is connected to the compensation circuit 4, the compensation circuit 4 is connected to the current given filter circuit 3, and the current given filter circuit 3 is connected to the input current given signal V g ; Simultaneously the compensation circuit 4 is also connected with the pulse width modulator U 1 1 control terminal.

[0019] Pulse Width Modulator U 1 0 uses a current mode pulse width modulator.

[0020] Drive pulse filter circuit 2 adopts resistor R 3 , R 4 and capacitance C 2 Composed of RC filter circuit.

[0021] Current given filter circuit 3 adopts capacitor C 1 Composed of capacitor filter circuit.

[0022] The compensatio...

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Abstract

The invention discloses a compensating chain realizing a stable current output of a power supply of an inverter welder, which includes a pulse width modulator U1, wherein a pulse output terminal of the pulse width modulator U1 is connected with a drive pulse filter circuit; the drive pulse filter circuit is connected with the compensating chain; the compensating chain is connected with a current given filter circuit; the current given filter circuit is connected with an incoming current given signal Vg; meanwhile, the compensating chain is connected with a controlling end of the pulse width modulator U1. The compensating chain realizing a stable current output of a power supply of an inverter welder is characterized in that a Hall sensor or a shunt is saved; a controlling circuit is simplified; interruptions caused by a traditional sample circuit are eliminated; system responding time is accelerated; power supply output constant current characteristic is improved.

Description

technical field [0001] The invention relates to a compensation circuit for realizing stable output current of an inverter welding machine power supply. Background technique [0002] In the prior art, the control of the known output constant current of the inverter welder requires Hall elements or shunts to sample and perform feedback and PI adjustment. The circuit is complicated, interference is easily introduced, and the cost is high. Contents of the invention [0003] The purpose of the present invention is to solve the deficiencies in the prior art, and propose a compensation circuit for realizing the output current stability of the inverter welding machine power supply. This scheme can save the Hall sensor or shunt, simplify the control circuit, eliminate the interference introduced by the traditional sampling circuit, speed up the system response time, and improve the constant current characteristic of the power supply output. [0004] To achieve the above object, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/10B23K9/09
Inventor 张一鹏苗华伟刘晨李海涛汪伟
Owner AOTAI ELECTRIC
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