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

A technology of series resonance and inverter power supply, which is applied in the direction of high-efficiency power electronic conversion, irreversible DC power input conversion to AC power output, electrical components, etc., which can solve the problem of increasing the difficulty of transformer design, the complexity of circuit work, and inverters. Problems such as low transmission efficiency and complex circuit structure achieve the effect of reducing the number of winding turns, simple control logic, and simplified circuit structure

Inactive Publication Date: 2009-05-20
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 wave inverse power supply circuit
  • Series resonant high-frequency chain sinusoidal wave inverse power supply circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In Fig. 1, the front-end full-bridge inverter circuit adopts a full-bridge structure composed of the first to fourth front-stage power tubes, and the DC input power V DC The anode of the positive pole is connected to the drains of the first pre-stage power tube M1 and the third pre-stage power tube M3, and the negative pole is connected to the source of the second pre-stage power tube M2 and the fourth pre-stage power tube M4; the series resonant inductance L r One end is connected to the source of the first pre-stage power tube M1 and the drain of the second pre-stage power tube M2, and the other end is connected to the series resonant capacitor C r One end of the high frequency transformer is connected; the same name end of the primary winding N1 of the high frequency transformer is connected with the series resonant capacitor C r The other end is connected, and the opposite end is connected to the source of the third pre-stage power tube M3 and the drain of the fourt...

Embodiment 2

[0025] In Fig. 2, the front full bridge inverter circuit adopts a full bridge structure composed of the first to fourth front power tubes, and the DC input power V DC The anode of the positive pole is connected to the drains of the first pre-stage power tube M1 and the third pre-stage power tube M3, and the negative pole is connected to the source of the second pre-stage power tube M2 and the fourth pre-stage power tube M4; the series resonant inductance L r One end is connected to the source of the first pre-stage power tube M1 and the drain of the second pre-stage power tube M2, and the other end is connected to the series resonant capacitor C r One end of the high frequency transformer is connected; the same name end of the primary winding N1 of the high frequency transformer is connected with the series resonant capacitor C r The other end is connected, and the opposite end is connected to the source of the third pre-stage power tube M3 and the drain of the fourth pre-stag...

Embodiment 3

[0030] exist image 3 Among them, the front-stage full-bridge inverter circuit adopts a full-bridge structure composed of the first to fourth front-stage power tubes, and the DC input power V DC The anode of the positive pole is connected to the drains of the first pre-stage power tube M1 and the third pre-stage power tube M3, and the negative pole is connected to the source of the second pre-stage power tube M2 and the fourth pre-stage power tube M4; the series resonant inductance L r One end is connected to the source of the first pre-stage power tube M1 and the drain of the second pre-stage power tube M2, and the other end is connected to the series resonant capacitor C r One end of the high frequency transformer is connected; the same name end of the primary winding N1 of the high frequency transformer is connected with the series resonant capacitor C r The other end is connected, and the opposite end is connected to the source of the third pre-stage power tube M3 and the ...

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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 are 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 th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/48H02M7/5387
CPCY02B70/1441Y02B70/10Y02P80/10
Inventor 邬伟扬金晓毅孙孝峰张纯江
Owner YANSHAN UNIV
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