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Compensation circuit for stabilizing output current of phase shift resonance soft switching inverter

A compensation circuit and output current technology, applied in the field of compensation circuit, can solve the problems of high cost, complex circuit, easy to introduce interference, etc.

Active Publication Date: 2011-07-27
JINING AOTAI ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it is only a control drive function. For the inverter with constant current output, as mentioned above, the current feedback link and PI adjustment link must be introduced. The circuit is complex, easy to introduce interference, and the cost is high

Method used

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  • Compensation circuit for stabilizing output current of phase shift resonance soft switching inverter
  • Compensation circuit for stabilizing output current of phase shift resonance soft switching inverter
  • Compensation circuit for stabilizing output current of phase shift resonance soft switching inverter

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] figure 1 Among them, it includes a super-forearm pulse generation and adjustment circuit 1, and the super-forearm pulse generation and adjustment circuit 1 is provided with a pulse width modulator U 1 , PWM U 1 The pulse output end of the drive pulse sampling circuit 2 is connected, and the lagging arm pulse generation adjustment circuit 5 and the amplification isolation circuit 8 are connected at the same time, and the pulse width modulator U 1 The pin 10 of the pin is connected to the lagging arm pulse generation regulation circuit 5, the slope compensation circuit 6 in the super forearm pulse generation regulation circuit 1 is connected to the lagging arm pulse generation regulation circuit 5, the driving pulse sampling circuit 2 is connected to the compensation circuit 4, and the compensation circuit 4 is connected with the current given fi...

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Abstract

The invention relates to a compensation circuit for stabilizing the output current of a phase shift resonance soft switching inverter. In the scheme, a Hall sensor or current diverter is eliminated, the control circuit is simplified, the interference introduced by the traditional sampling circuit is eliminated, the system response time is reduced, and the output constant-current characteristic ofthe inverter is improved. The compensation circuit mainly comprises a leading leg pulse generating and regulating circuit, the pulse output terminal of the leading leg pulse generating and regulatingcircuit is respectively connected with a driving pulse sampling circuit, a lagging leg pulse generating and regulating circuit and an amplifying and isolating circuit, the driving pulse sampling circuit is connected with a compensating circuit, the compensating circuit is connected with a current given filtering circuit, and the compensating circuit is connected with an input current given signalVg; and the current given filtering circuit is respectively connected with the leading leg pulse generating and regulating circuit and the lagging leg pulse generating and regulating circuit, and thelagging leg pulse generating and regulating circuit is also respectively connected with the driving pulse sampling circuit, the current given filtering circuit and the amplifying and isolating circuit.

Description

technical field [0001] The invention relates to a compensation circuit for realizing stable output current of a phase-shifting resonant soft-switching inverter. Background technique [0002] In the prior art, the phase-shifting resonant soft-switching inverter is an inverter with excellent performance and is widely used. The known control of the output constant current of the phase-shifting resonant soft-switching inverter requires Hall elements or shunts to sample and perform feedback and PI adjustment. The circuit is complex, it is easy to introduce interference, and the cost is high. Chinese patent application 200810014677.5 discloses "A Compensation Circuit for Realizing Stable Output Current of Inverter Welding Machine Power Supply", which is applied to inverter welding machines working in hard switching mode. After using the compensation circuit, it has the function of eliminating the Hall sensor or The shunt simplifies the control circuit, eliminates the interference...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/48
CPCY02B70/1491Y02B70/10
Inventor 张光先刘晨苗华伟李海涛邓伟
Owner JINING AOTAI ELECTRICAL
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