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Single-phase high-frequency inverter based on SCC-LCL-T resonant network

A technology of SCC-LCL-T and high-frequency inverter, which is applied in the direction of high-efficiency power electronic conversion, output power conversion device, AC power input conversion to DC power output, etc., which can solve the problem of difficult to provide output current and input voltage fluctuations Sensitivity, the converter lacks effective controllable means, etc., to achieve the effect of small switching loss, simple control circuit, and easy implementation

Active Publication Date: 2015-05-20
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, when the commonly used high-frequency AC inverter is used as a current source to feed power to the high-frequency AC current bus, the output current is sensitive to input voltage fluctuations, and the impact on component errors cannot be eliminated, and the converter itself lacks effective controllable means, it is difficult to provide a constant output current

Method used

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  • Single-phase high-frequency inverter based on SCC-LCL-T resonant network
  • Single-phase high-frequency inverter based on SCC-LCL-T resonant network
  • Single-phase high-frequency inverter based on SCC-LCL-T resonant network

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Embodiment

[0030] Such as figure 1 Shown is the structural diagram of the constant current source type single-phase high-frequency inverter based on the SCC-LCL-T resonant network according to the present invention. The constant current source type single-phase high-frequency inverter based on the SCC-LCL-T resonant network is composed of an interconnected half-bridge inverter unit X and an SCC-LCL-T resonant network unit Y, and the SCC-LCL-T The resonant network unit Y has a controllable switched capacitor SCC Z. The half-bridge inverter unit X includes a first switching tube S 1 , the second light switch S 2 , the first diode VD 1 , the second diode VD 2 , the first capacitance C1 , the second capacitance C 2 ; Among them, the first switching tube S 1 drain and the first diode VD 1 The positive electrodes are connected with the first capacitor C 1 connected to the positive pole; the first switching tube S 1 source and the first diode VD 1 The cathode and the first capacitor C...

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Abstract

The invention discloses a constant current source type single-phase high-frequency inverter based on a SCC-LCL-T resonant network. The constant current source type single-phase high-frequency inverter based on the SCC-LCL-T resonant network comprises a half-bridge inverting unit X and an SCC-LCL-T resonant network unit Y which are connected with each other, wherein the SCC-LCL-T resonant network unit Y is provided with a switched controllable capacitor (SCC); a resonant inductor L, a first inductor La and a first resonant capacitor Cs of an LCL-T resonant network construct a T-shaped structure; the SCC is connected in series to the capacitor branch of the LCL-T network, and comprises a first third switch tube S3 and a fourth switch tube S4 which are connected in series reversely. The single-phase high-frequency inverter has the advantages of convenience in control, easiness in implementation, capability of realizing ZVS (Zero Voltage Switching) soft switching conveniently, small switching loss, high conversion efficiency, capability of compensating for the influences of input voltage fluctuation and element parameter errors by using the controllable capacitor, capability of ensuring constant current output, and the like.

Description

technical field [0001] The invention relates to a high-frequency alternating current power distribution (HFAC PDS) technology, in particular to a single-phase high-frequency inverter based on a SCC-LCL-T resonant network. Background technique [0002] Compared with the DC PDS method, the high-frequency AC power distribution (HFAC PDS) method has the advantages of convenient voltage conversion and high power density. It can be applied to computers and communication equipment with low power and short-distance transmission. It is applied in the fields of electric vehicles and microgrids with medium power and long distance transmission. The single-phase high-frequency inverter is responsible for converting direct current into high-frequency alternating current, and then feeding it to the high-frequency alternating current bus. At present, when the commonly used high-frequency AC inverter is used as a current source to feed power to the high-frequency AC current bus, the output ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387H02M7/539
CPCH02M7/4807H02M7/53871H02M1/0058H02M7/4815Y02B70/10
Inventor 刘俊峰曾君李学胜孙伟华
Owner SOUTH CHINA UNIV OF TECH
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