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Series resonant high-frequency chain sinusoidal waev inverse power supply circuit

A series resonance, inverter power supply technology, applied in high-efficiency power electronic conversion, irreversible DC power input conversion to AC power output, electrical components and other directions, can solve the problem of increasing the difficulty of transformer design, circuit work complexity, inverter The problems of low transmission efficiency and large number of switches can reduce the number of winding turns, simplify the control logic, and simplify the circuit structure.

Inactive Publication Date: 2005-02-23
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The primary side of the inverter requires two sets of high-frequency inverter bridges, the circuit structure is complex, the number of switches is large, and the transmission efficiency of the inverter is not high; in order to achieve difference frequency work, two transformers with two sets of secondary sides are also required. This increases the design difficulty of the transformer and the complexity of the circuit work at the same time.

Method used

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  • Series resonant high-frequency chain sinusoidal waev inverse power supply circuit
  • Series resonant high-frequency chain sinusoidal waev inverse power supply circuit
  • Series resonant high-frequency chain sinusoidal waev inverse power supply circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] exist figure 1 , the DC input supply V DC The anode of the positive pole is connected to the drains of the pre-stage power tubes M1 and M3, and the negative pole is connected to the sources of the pre-stage power tubes M2 and M4; the series resonant inductor L r One end is connected to the source of the pre-stage power tube M1 and the drain of the pre-stage power tube M2; the other end is connected to the series resonant capacitor C r One end of the high-frequency transformer N1 with the same name and the resonant capacitor C r The opposite end is connected to the other end, and the opposite end is connected to the source of the pre-stage power tube M3 and the drain of the pre-stage power tube M4, thus forming the pre-stage full-bridge LC series resonant inverter of the series resonant high-frequency chain sine wave inverter power supply circuit. The same-named end of one side N2 of the high-frequency transformer is connected to the collector of the power tube S1 of ...

Embodiment 2

[0026] exist figure 2 Among them, the front-stage full-bridge LC series resonant inverter circuit of the series resonant high-frequency chain sine wave inverter power supply and figure 1 The shown embodiment 1 is the same, and the post-stage cycle conversion and filter circuit are composed as follows: post-stage power tubes S2 and S4 are exchanged, and the post-stage power tubes S1 and S4 and the post-stage power tubes S2 and S3 are connected into a half-bridge mode .

Embodiment 3

[0028] exist image 3 Among them, the front-stage full-bridge LC series resonant inverter circuit of the series resonant high-frequency chain sine wave inverter power supply and figure 1 Example 1 shown is the same. The post-stage cycle conversion and filtering circuit is composed as follows: post-stage power tubes S1 and S3 exchange positions, post-stage power tubes S2 and S4 exchange positions, and the post-stage power tubes S3 and S4 and post-stage power tubes S1 and S2 are connected into a Common electrode mode.

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Abstract

The power circuit applies the full bridge LC serial connected resonance and the frequency transformer structure to achieve the power transmission. The full bridge LC serial connected resonance converts the power supply of direct current into resonance current, by utilizing the zone current switch. The structure of the high frequency transformer achieves the electric separation and the power transmission. The simple constructed circuit can achieve the power transmit of dual direction, without testing the direction of the output current.

Description

technical field [0001] The invention relates to a sine wave inverter power supply circuit, which is a sine wave inverter power supply circuit using a current source type high-frequency chain isolation transmission of power realized by series resonance. Background technique [0002] At present, sine wave inverter power supply is widely used in UPS system, AC motor power supply, induction heating and renewable energy system, and high frequency chain inverter technology is gradually replacing traditional inverter with its advantages of high performance, high reliability, small size and light weight. change technology. According to different circuit structures, high-frequency link inverters can be mainly divided into voltage source type, current source type, and difference frequency mode. [0003] Since the unidirectional voltage source sine wave inverter contains a diode rectification part in the main circuit, the energy can only be transmitted in one direction; and because of...

Claims

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Application Information

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CPCY02B70/1441Y02B70/10Y02P80/10
Inventor 邬伟扬金晓毅孙孝峰张纯江
Owner YANSHAN UNIV
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