A three-phase isolated step-down PFC rectifier control method

A technology of isolation step-down and control method, applied in the direction of AC power input conversion to DC power output, output power conversion device, climate sustainability, etc., to achieve low current harmonic content, high power density, and high power factor Effect

Active Publication Date: 2020-07-03
LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a three-phase isolated step-down PFC rectifier and its control method, to solve at least one problem existing in the existing three-phase PFC rectifier circuit

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  • A three-phase isolated step-down PFC rectifier control method
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  • A three-phase isolated step-down PFC rectifier control method

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Embodiment Construction

[0033] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below ...

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Abstract

The invention relates to the technical field of power electronic converters, in particular to a three-phase isolated buck-mode PFC rectifier and a control method thereof. The three-phase isolated buck-mode PFC rectifier comprises a three-phase rectifier bridge unit and a switch array unit, wherein the three-phase rectifier bridge unit comprises three rectifier bridge arms, and each rectifier bridge arm comprises an upper diode and a lower diode separately; and the switch array unit comprises a high-frequency switch group and three bidirectional switch groups, the high-frequency switch group iscomposed of a first switch tube, a second switch tube, a third switch tube and a fourth switch tube which are connected in series, and the three bidirectional switch groups comprise a first bidirectional switch group, a second bidirectional switch group and a third bidirectional switch group. According to the three-phase isolated buck-mode PFC rectifier and the control method thereof, the whole system structure can be simpler, the efficiency is improved, the three-phase isolated buck-mode PFC rectifier has the advantages of high power factor, low current harmonic content, high power supply density and high efficiency and can be widely applied to occasions where three-phase power supply with higher power density requirements are supplied.

Description

technical field [0001] The invention relates to the technical field of power electronic converters, in particular to a three-phase isolated step-down PFC rectifier and a control method thereof. Background technique [0002] With more and more power electronic devices used in electronic equipment, the capacity of the electric load in the three-phase power grid is getting larger and larger, which adds a lot of reactive power and harmonic pollution to the AC power system of the power grid, and a large amount of reactive power The power leads to serious loss of the power grid, increased heat generation, and even paralysis of the power grid and damage to equipment in severe cases. In this way, it is necessary to perform power factor correction (PFC) on the three-phase AC power supply to reduce the current harmonic content in the power grid and reduce the power grid. The reactive power can improve the power factor of the power grid. [0003] In order to solve the above problems, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/219H02M1/42H02M1/12
CPCH02M1/12H02M1/4216H02M1/4241H02M1/4258H02M7/219Y02B70/10
Inventor 戴钱坤许政王文涛
Owner LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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