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A non-electrolytic capacitor single-stage single-phase isolated ac/dc converter with integrated power factor correction function

A technology of integrating power and electrolytic capacitors, which is applied in the output power conversion device, the conversion of DC power input to DC power output, the conversion of irreversible AC power input to DC power output, etc. Problems such as voltage spikes in stage boost converters

Active Publication Date: 2021-04-23
SOUTHEAST UNIV
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  • Abstract
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Problems solved by technology

[0008] Purpose of the invention: Aiming at the deficiencies of the prior art, the present invention proposes a non-electrolytic capacitor single-stage single-phase isolated AC / DC converter with integrated power factor correction function to solve the existing two-stage converter with complex structure, Low power density, the problem of voltage spikes in single-stage boost converters

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  • A non-electrolytic capacitor single-stage single-phase isolated ac/dc converter with integrated power factor correction function
  • A non-electrolytic capacitor single-stage single-phase isolated ac/dc converter with integrated power factor correction function
  • A non-electrolytic capacitor single-stage single-phase isolated ac/dc converter with integrated power factor correction function

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Embodiment Construction

[0034] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0035] Such as figure 1As shown, a non-electrolytic capacitor single-stage single-phase isolated AC / DC converter with integrated power factor correction function of the present invention includes an input port 1.1, an EMI filter 1.2, an input rectifier bridge 1.3, an input inductor 1.4, and an inverter Bridge 1.5, high-frequency isolation transformer 1.6, rectifier circuit 1.7 and output port 1.8; input port 1.1 is connected to the input AC voltage V ac , and supply power to the EMI filter 1.2; the output port of the EMI filter 1.2 is connected to the input rectifier bridge 1.3; the input rectifier bridge 1.3 is connected to the inverter bridge 1.5 via the input inductance 1.4, and supplies power to it; the inverter bridge 1.5 is connected to the high The frequency isolation transformer 1.6 supplies power to the rectifier circuit 1.7; the r...

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Abstract

The invention discloses a non-electrolytic capacitor single-stage single-phase isolated AC / DC converter with an integrated power factor correction function. The converter includes an input port, an EMI filter, an input rectifier bridge, an input inductor, an inverter bridge, High-frequency isolation transformer, rectification circuit and output port. Among them, the inverter bridge and the rectifier circuit adopt a new modulation method, realize electrical isolation, power factor correction function and adjust the output voltage at the same time, so as to avoid the additional use of a separate power factor correction circuit, avoid the use of electrolytic capacitors, and reduce active components and passive components. The number of devices used can further improve the power density and service life, and meet the high reliability operation requirements of the power converter.

Description

technical field [0001] The invention relates to a single-phase isolated AC / DC converter, in particular to a single-stage converter with integrated power factor correction function and no electrolytic capacitor. Background technique [0002] An alternating current / direct current (AC / DC) converter, also known as a rectifier, is a key power electronic device between the AC grid and large DC devices, and plays an important role in the efficient energy conversion between the grid and DC devices. High-power AC-DC converters are increasingly important as high-power DC equipment is widely used in modern data centers, electric vehicle chargers, or DC power distribution systems in commercial buildings. The topology of a general AC / DC converter consists of three stages: AC / DC rectification, power factor correction (PFC) converter and isolated DC / DC converter. At the same time, the AC / DC converter must meet the following two requirements: [0003] 1) Power Factor Correction (PFC) and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335H02M7/06H02M1/42H02M1/12
CPCH02M1/12H02M1/4266H02M3/33576H02M7/06Y02B70/10
Inventor 王政张玥程明张建忠
Owner SOUTHEAST UNIV
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