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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  • Abstract
  • Description
  • Claims
  • Application Information

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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 instantaneo

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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[0032] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The drawings show preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is 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 those skilled in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "or / and" as used herein includes any and all combinations of one or more re...

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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...

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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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