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AC-AC conversion circuit and conversion method thereof

A conversion circuit and control circuit technology, which can be applied to conversion equipment that can be converted to DC without intermediate conversion, etc., can solve the problems of large size, complex structure, and unsatisfactory combination of waveform quality switches, so as to reduce product cost and volume. , the effect of improving the conversion efficiency

Inactive Publication Date: 2015-04-08
SHENZHEN WISEPOWER INNOVATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Two-stage (AC-DC-AC) inverters using these energy buffer storage elements have some obvious disadvantages, such as large size, high cost, etc., and require very complex dynamic control in practical applications
[0003] Although the forced switch matrix structure adopted by some circuit structures can eliminate the link of DC to DC conversion, the structure of the traditional forced switch matrix converter is complex, and the synchronization between the instantaneous input and output will become very difficult, and the quality of the output waveform is due to the complex The switch combination becomes less than ideal
Therefore cannot generate qualified high frequency current for wireless power transfer applications

Method used

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  • AC-AC conversion circuit and conversion method thereof
  • AC-AC conversion circuit and conversion method thereof
  • AC-AC conversion circuit and conversion method thereof

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the embodiments and with reference to the accompanying drawings.

[0018] For an AC-AC conversion circuit of this embodiment, please refer to the attached figure 1 , including the AC supply V AC , the AC supply V AC The two output ends are connected to the sources of the first switch MOSFET S1 and the second switch MOSFET S2 respectively, and the drains of the first switch MOSFET S1 and the second switch MOSFET S2 are connected in parallel with an LC series circuit and a free Oscillation control circuit, the free oscillation control circuit is composed of the third switch MOSFET tube S3 and the fourth switch MOSFET tube S4 connected in series in reverse, the first switch MOSFET tube S1, the second switch MOSFET tube S2, the third switch MOSFET tube Both the tube S3 and the fourth switching MOSFET tube S4 are connected in antiparallel with a diode.

[0019] The AC power V in this AC-AC...

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PUM

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Abstract

The invention discloses an AC-AC conversion circuit comprising an AC power supply. The two output ends of the AC power supply are respectively connected with the same electrode of a first switch tube and a second switch tube. The other electrode of each of the first switch tube and the second switch tube is connected in parallel with an LC series-connection circuit and a free oscillation control circuit. The free oscillation control circuit is formed by at least two series-connected switch tubes through connection. At least one switch tube of the free oscillation control circuit is reversely connected. All the switch tubes are reversely connected in parallel with a diode respectively. The invention also discloses a conversion method of the AC-AC conversion circuit. The AC-AC conversion circuit has advantages of being small in size, low in cost and high in conversion efficiency.

Description

technical field [0001] The invention relates to a conversion circuit, in particular to an AC-AC conversion circuit with small volume, low cost and high conversion efficiency and a conversion method thereof. Background technique [0002] Currently, the DC to AC power conversion method is a general solution for generating high-frequency AC power in coils / rails in wireless power transmission systems. Generally speaking, the front-end power frequency needs to be rectified into DC first, and then further converted into the required high-frequency AC current. In addition to connecting the rectifier bridge and high-frequency inverter in the circuit, some energy buffer storage elements, such as inductors and capacitors, must also be used. Two-stage (AC-DC-AC) inverters using these energy buffer storage elements have some obvious disadvantages, such as large size, high cost, etc., and require very complicated dynamic control in practical applications. [0003] Although the forced s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/06
Inventor 李昊
Owner SHENZHEN WISEPOWER INNOVATION TECH