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High-frequency alternating-current output phase-shifted full-bridge inverter

A phase-shifting full-bridge and high-frequency AC technology, which is applied in the direction of converting AC power input to DC power output, output power conversion device, and high-efficiency power electronic conversion, etc., can solve the problems of high loss and instability, and achieve simple structure , reduce the overall loss, the effect of a wide range of application prospects

Inactive Publication Date: 2019-12-24
STATE GRID SHANDONG ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the inverter technology based on SiC materials is not mature, and there are defects such as high loss and instability.

Method used

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  • High-frequency alternating-current output phase-shifted full-bridge inverter
  • High-frequency alternating-current output phase-shifted full-bridge inverter
  • High-frequency alternating-current output phase-shifted full-bridge inverter

Examples

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Embodiment 1

[0026] Please refer to figure 1 , this embodiment provides a high-frequency AC output phase-shifted full-bridge inverter, a control system, a rectifier circuit, an input filter circuit, a full-bridge inverter circuit, a high-frequency transformer, and an output filter circuit, and the output terminal of the rectifier circuit is connected to The input end of the input filter circuit; the output end of the input filter circuit is connected to the input end of the full-bridge inverter circuit; the output end of the full-bridge inverter circuit is connected to the input end of the high-frequency transformer; the output end of the high-frequency transformer is connected to the output filter circuit Input terminal; the control system is connected to the output terminal of the output filter circuit through the input terminal, and the output terminal of the control system is connected to the full-bridge inverter circuit through the drive circuit

Embodiment 2

[0028] Please refer to figure 2 , this embodiment provides a high-frequency AC output phase-shifted full-bridge inverter, a control system, a rectifier circuit, an input filter circuit, a full-bridge inverter circuit, a high-frequency transformer, and an output filter circuit, and the output terminal of the rectifier circuit is connected to The input end of the input filter circuit; the output end of the input filter circuit is connected to the input end of the full-bridge inverter circuit; the output end of the full-bridge inverter circuit is connected to the input end of the high-frequency transformer; the output end of the high-frequency transformer is connected to the output filter circuit Input terminal; the control system is connected to the output terminal of the output filter circuit through the input terminal, and the output terminal of the control system is connected to the full-bridge inverter circuit through the drive circuit, wherein, such as image 3 As shown, t...

Embodiment 3

[0030] This embodiment provides a high-frequency AC output phase-shifted full-bridge inverter, a three-phase uncontrollable rectifier circuit, a phase-shifted full-bridge ZVS inverter circuit, an output filter circuit, a load, a drive circuit, and a DSP main control unit, such as figure 1 shown. Input AC 380V, and then get 220V AC to supply the load after three-phase uncontrollable rectification, voltage stabilization, inverter, and output filtering.

[0031] Among them, (1) rectifier circuit

[0032] On the rectifier side, a three-phase uncontrollable rectifier bridge is used to convert AC power into DC power, and the average value of the output voltage is the largest at no-load, which is As the load increases, the average value of the output voltage decreases, and the minimum average value is u d =2.34U 2 , the value of Ud is between 2.34U2 and 2.45U2.

[0033] (2) Input filter circuit

[0034] Since the voltage obtained through uncontrolled rectification is pulsating ...

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Abstract

The invention provides a high-frequency alternating-current output phase-shifted full-bridge inverter, which comprises a control system, a rectifier circuit, an input filter circuit, a full-bridge inverter circuit, a high-frequency transformer and an output filter circuit. The output end of the rectifier circuit is connected with the input end of the input filter circuit. The output end of the input filter circuit is connected with the input end of the full-bridge inverter circuit. The output end of the full-bridge inverter circuit is connected with the input end of the high-frequency transformer. The output end of the high-frequency transformer is connected with the input end of the output filter circuit. The control system is connected with the output end of the output filter circuit through the input end thereof, and the output end of the control system is connected with the full-bridge inverter circuit through a drive circuit. According to the invention, the turn-on loss is reduced, so that the overall loss of the inverter is reduced, the conversion efficiency of the inverter is improved, the stability and reliability in the power transmission process of a large power grid areimproved, and the occurrence probability of accidents is reduced.

Description

technical field [0001] The invention relates to the technical field of power supply equipment, in particular to a high-frequency AC output phase-shifting full-bridge inverter. Background technique [0002] With the development of power electronics technology, power electronic devices with high efficiency and high power density are widely used in electronic / mechanical equipment, which is the mainstream power supply method for electronic products today. In many important power electronics technology applications such as new energy power generation systems, motor drives, induction heating power supplies, high-power welding machine power supplies, and electroplating power supplies, there are high requirements for the reliability and efficiency of inverters. With the continuous improvement of the market's requirements for inverter performance and power density, how to improve the conversion efficiency of the inverter at high switching frequency, so as to improve its performance i...

Claims

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Application Information

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IPC IPC(8): H02M7/5387
CPCH02M7/5387H02M1/0058Y02B70/10
Inventor 马如伟张春美王东华韩涛吕赟高飞黄俊生马伟宋建国张文娟任维峰刘国庆
Owner STATE GRID SHANDONG ELECTRIC POWER
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