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Control method and device for rectifier as well as circuit

A control method and rectifier technology, applied in the field of devices and circuits, and rectifier control methods, can solve problems such as large output voltage ripple, and achieve the effects of stable output voltage, reducing control delay, and improving response speed.

Inactive Publication Date: 2017-05-31
GUANGZHOU ZHIYUAN ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the existence of the integral item in the proportional-integral controller, the actual control is delayed. When there is an instantaneous change in the load, the output voltage of the rectifier has a long fluctuation time, which will cause a large ripple on the output voltage.

Method used

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  • Control method and device for rectifier as well as circuit
  • Control method and device for rectifier as well as circuit
  • Control method and device for rectifier as well as circuit

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Embodiment Construction

[0032] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "or / and" includes any and all combinations of one or more of ...

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Abstract

The invention provides a control method and device for a rectifier. Output-side voltage and reference voltage of the rectifier are acquired, and the voltage difference between the reference voltage and the output-side voltage is determined; proportional integral control is performed on the voltage difference, and reference current is acquired; an input-side voltage peak and current components of the rectifier are acquired; the current components are subjected to filtering processing, and a filtering result is obtained; the current deference is obtained according to the reference current and the filtering result; the controlling quantity is acquired by performing proportional control processing on current deviation; a reference control signal is determined according to the control quantity and the voltage peak. The method and the device have the beneficial effect of stabilizing output voltage of the rectifier. The invention further provides a rectifier control circuit with the same beneficial effect.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a control method, device and circuit for a rectifier. Background technique [0002] With the advancement of power electronics technology, the requirements for power quality are getting higher and higher. However, non-linear loads are unavoidably used in industrial products, which cause distortion, harmonic pollution, and imbalance to the grid voltage, which have also attracted much attention. As an indispensable part of the variable frequency power supply, the rectifier can keep the grid-side input current sinusoidal and reduce grid pollution. Currently common rectifier control methods include: voltage-oriented current decoupling double closed-loop control, voltage-oriented direct power control, single-cycle control, etc. [0003] Aiming at the currently commonly used voltage-oriented current decoupling double closed-loop control method, the current loop adopts a prop...

Claims

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Application Information

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IPC IPC(8): H02M7/04
CPCH02M7/04
Inventor 周立功魏小忠
Owner GUANGZHOU ZHIYUAN ELECTRONICS CO LTD
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