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Step-up high frequency link AC-AC transducer

A converter and step-up technology, applied in the direction of conversion equipment that can be converted to direct current without intermediate conversion, can solve the problems of low reliability, low power factor on the power supply side, small output capacity, etc., and achieve high reliability, Superior comprehensive performance and strong load adaptability

Active Publication Date: 2009-05-20
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned Buck and Buck-Boost high-frequency link AC-AC converters have many advantages, they still have low power factor on the power supply side, low reliability when the load is short-circuited (Buck type), and small output capacity (Buck-Boost type). and other shortcomings

Method used

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  • Step-up high frequency link AC-AC transducer
  • Step-up high frequency link AC-AC transducer
  • Step-up high frequency link AC-AC transducer

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Embodiment Construction

[0012] The circuit structure of the Boost type high-frequency link AC / AC converter is composed of an input filter circuit, an energy storage inductor, an input cycloconverter, a high-frequency transformer, an output cycloconverter, and an output filter circuit cascaded, as shown in Figure 1. . Among them, Figure 1(a) is the circuit structure, and Figure 1(b) is the circuit principle waveform. Due to the instantaneous value u of the low-frequency sinusoidal AC voltage output by the converter at the same time o The instantaneous value u above the input low-frequency sinusoidal AC voltage i and high frequency transformer turns ratio N 2 / N 1 The product of (u i N 2 / N 1 ), so it is called a boost (Boost) high-frequency link AC / AC converter. Both the input cycloconverter and the output cycloconverter in the circuit structure are composed of four-quadrant high-frequency power switches, which can withstand bidirectional voltage stress and bidirectional current stress, and the...

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Abstract

This invention relates to a boost high frequency AC / AC converter, which circuit is cascaded by an energy storage inductor, an input cycle converter, a HF transformer, an output cycle converter and an input and output filter circuit to turn a bad unstable AC current to a stable shared high grade sine AC current having the advantages of high frequency electric isolation, simple topological circuit, two stages of power transformation, two-way power-flow, high power factor at the supply side.

Description

technical field [0001] The boost (Boost) high-frequency link AC / AC converter involved in the present invention belongs to the power electronic conversion technology. Background technique [0002] High-frequency link conversion technology refers to the power conversion technology with high-frequency electrical isolation (above 20kHz) between the output load and the input power supply. It is an effective way to achieve high power density of the converter and match the output voltage with the input voltage. Power electronics researchers have achieved remarkable results in the research of high-frequency link DC / DC converters, high-frequency link AC / DC converters, and high-frequency link DC / AC inverters, and have led to the occurrence of power electronic converters. Huge changes: 1) The electrically isolated DC / DC converter has become lighter; 2) The AC / DC rectifier power supply has developed from the traditional power-frequency variable voltage phase-controlled rectifier circuit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M5/22
Inventor 陈道炼
Owner FUZHOU UNIV
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