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Interleaved parallel three-phase pfc circuit

A circuit, three-phase technology, applied in the field of interleaved parallel three-phase PFC circuit, can solve the problems of increased input current ripple, difficult filter design, centralized heating components, etc., to reduce input current fluctuation, facilitate PCB layout and Thermal design, effect of reducing volume

Active Publication Date: 2015-10-21
HANGZHOU ZHONGHEN ELECTRIC CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two traditional methods will bring the disadvantages of increased input current ripple, difficult filter design, difficulty in thermal design due to the concentration of heat-generating devices, and larger power supply volume.

Method used

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  • Interleaved parallel three-phase pfc circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] refer to Figure 1-5 , an interleaved parallel three-phase PFC circuit, which consists of two Vienna converters, the Vienna converter is a three-phase three-switch three-level PFC structure, the three-phase input of the first Vienna converter is respectively connected to the second Vienna converter Three-phase input, the three-level output of the first Vienna converter is respectively connected to the three-level output of the second Vienna converter, the first Vienna converter and the second Vienna converter each include three bidirectional switches, and the bidirectional The switches are all controlled to be turned on and off by the current magnitude of an independent inductor, the cycle start and end times of the three bidirectional switches of the first Vienna converter are the same, and the cycles of the three bidirectional switches of the second Vienna converter start Same as the end time, the cycle start and end times of the three bidirectional switches of the fi...

Embodiment 2

[0036] refer to Figure 7 The difference between this embodiment and the first embodiment is that the bidirectional switch is composed of a rectifier bridge and a switch tube, and the outputs of the rectifier bridge and the switch tube are connected in parallel. The rest of the structures and functions are the same as those in Embodiment 1.

Embodiment 3

[0038] refer to Figure 8 The difference between this embodiment and the first embodiment is that the bidirectional switch is composed of a rectifier bridge and a switch tube, and the outputs of the rectifier bridge and the switch tube are connected in parallel. Moreover, instead of connecting the middle node of the inductor and the bidirectional switch to the middle node between the two diodes in series, the two ends of the switching tube of the bidirectional switch are connected between the two diodes in series. The rest of the structures and functions are the same as those in Embodiment 1.

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Abstract

The invention discloses an interleaved parallel three-phase power factor correction (PFC) circuit. The circuit consists of two Vienna converters, wherein the Vienna converters have three-phase three-switch three-level PFC structures; three phase inputs of the first Vienna converter are connected with three phase inputs of the second Vienna converter respectively; three level outputs of the first Vienna converter are connected with three level outputs of the second Vienna converter respectively; the period starting time and the period ending time of three bidirectional switches of the first Vienna converter are the same; the period starting time and the period ending time of three bidirectional switches of the second Vienna converter are the same; and the period starting time and the period ending time of the three bidirectional switches of the first Vienna converter are half period earlier or later than the period starting time and the period ending time of the three bidirectional switches of the second Vienna converter.

Description

technical field [0001] The invention relates to an interleaved parallel three-phase PFC circuit. Background technique [0002] Today, when the concept of green energy is deeply rooted in the hearts of the people, power factor correction has become an indispensable part of the power supply. The application of single-phase power factor correction technology has been very mature, and the single-phase PFC power supply of 100W-4000W has been commercialized. With the increasing requirements of modern power supply systems for three-phase AC input equipment that pollutes the power grid, it will be an inevitable trend to use three-phase PFC technology for high-power rectifier power supplies. There are two ways to increase the power in the traditional sense: one is to keep the number of devices constant and increase the device capacity. That is, the voltage and current stress of the power tube increases, and the capacity and volume of the inductor and capacitor increase; the second ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/42H02M1/44H02M1/12
CPCY02B70/126Y02B70/10Y02P80/10
Inventor 孙涛郭卫农
Owner HANGZHOU ZHONGHEN ELECTRIC CO LTD
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