阅读说明：本技术 一种高频交流输出移相全桥逆变器 (High-frequency alternating-current output phase-shifting full-bridge inverter ) 是由 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 于 2019-09-17 设计创作，主要内容包括：本发明提供一种高频交流输出移相全桥逆变器,包括控制系统、整流电路、输入滤波电路、全桥逆变电路、高频变压器和输出滤波电路,所述整流电路输出端连接输入滤波电路的输入端；所述输入滤波电路输出端连接全桥逆变电路输入端；所述全桥逆变电路输出端连接高频变压器输入端；所述高频变压器输出端连接输出滤波电路输入端；所述控制系统通过输入端连接输出滤波电路输出端,所述控制系统输出端通过驱动电路连接全桥逆变电路。本发明降低了开通损耗,从而降低逆变器整体损耗,提高逆变器的转换效率,提高大电网输电过程中的稳定性与可靠性,减小事故发生概率。(The invention provides a high-frequency alternating-current output phase-shifted full-bridge inverter which comprises a control system, a rectifying circuit, an input filter circuit, a full-bridge inverter circuit, a high-frequency transformer and an output filter circuit, wherein the output end of the rectifying 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, and the output end of the control system is connected with the full-bridge inverter circuit through the driving circuit. The invention reduces the opening loss, thereby reducing the integral loss of the inverter, improving the conversion efficiency of the inverter, improving the stability and reliability of a large power grid in the power transmission process and reducing the accident occurrence probability.)

1. A high-frequency alternating current output phase-shifted full-bridge inverter is characterized by comprising a control system, a rectifying circuit, an input filter circuit, a full-bridge inverter circuit, a high-frequency transformer and an output filter circuit, wherein the output end of the rectifying 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, and the output end of the control system is connected with the full-bridge inverter circuit through the driving circuit.

2. A high frequency ac output phase-shifted full-bridge inverter according to claim 1, wherein said rectifying circuit is a three-phase uncontrollable rectifying bridge circuit.

3. The high-frequency alternating-current output phase-shifted full-bridge inverter according to claim 2, wherein the three-phase uncontrollable rectifier bridge circuit adopts an SKD100/16 rectifier bridge module of 6-unit modules; and a three-phase uncontrollable rectifier bridge circuit is arranged, the repeatable turn-off peak voltage is 1200V, and the effective value of the current is 25A.

4. A high frequency ac output phase-shifted full-bridge inverter according to claim 1, wherein said input filter circuit comprises a plurality of parallel filter capacitors.

5. The high frequency ac output phase-shifted full-bridge inverter according to claim 1, wherein the magnetic core material of said high frequency transformer is ferrite material.

6. The high-frequency alternating-current output phase-shifted full-bridge inverter according to claim 1, wherein the full-bridge inverter circuit comprises a direct-current power supply, four switching tubes, four diodes, four junction capacitors, a resonant inductor Lr, a transformer T, an output filter inductor, a capacitor and a load; two switching tubes form a leading bridge wall of the inverter circuit, and the other two switching tubes form a lagging bridge wall of the inverter circuit; the two switch tubes of the leading bridge arm are respectively connected with a capacitor in parallel; and capacitors are respectively connected in parallel to the two switch tubes of the hysteresis bridge arm.

7. The high frequency AC output phase-shifted full-bridge inverter according to claim 6, wherein the switching tubes are SiC MOSFETs.

8. The high frequency AC output phase-shifted full-bridge inverter according to claim 6, wherein the capacitance values of the parallel capacitors of said lag leg are each 2.5 nF.

Technical Field

The invention relates to the technical field of power supply equipment, in particular to a high-frequency alternating-current output phase-shifted full-bridge inverter.

Background

The power electronic technology is a core technology in the field of energy efficient conversion, the power electronic device is based on the power electronic device, the efficient generation, transmission, conversion, storage and control of electric energy are realized, the effective utilization of energy sources is improved, the effective development of energy sources is promoted, the economic development of national economy is promoted, more than 70% of electric energy in the world is controlled by the power electronic device, if the performance of the power electronic device can be improved, the energy transmission efficiency can be greatly improved, the highest temperature-resistant power consumption of SiC can be greatly reduced, the highest temperature-resistant power transmission efficiency can be greatly reduced, compared with the highest temperature-resistant power transmission efficiency of SiC, SiC-resistant power transmission efficiency of SiC-resistant power transmission devices can be greatly reduced, the highest temperature-resistant power transmission efficiency of SiC-resistant power transmission devices can be greatly reduced, the SiC-resistant power transmission efficiency of SiC-resistant power transmission devices, the SiC-resistant power transmission high-voltage-resistant power transmission high-resistant power transmission efficiency high-resistant power transmission devices can be greatly reduced, the environment can be greatly reduced, the highest-resistant power transmission efficiency of SiC-resistant power transmission high-resistant power transmission high-resistant power-voltage-resistant power-voltage MOSFET (the environment-resistant power-voltage-resistant power-capable high-energy-capable high-capable.

The current inverter technology based on SiC materials is not mature, and has the defects of high loss, instability and the like.

Disclosure of Invention

In view of the above-mentioned deficiencies of the prior art, the present invention provides a high frequency ac output phase-shifted full-bridge inverter to solve the above-mentioned technical problems.

The embodiment of the application provides a high-frequency alternating-current output phase-shifted full-bridge inverter, which comprises a control system, a rectifying circuit, an input filter circuit, a full-bridge inverter circuit, a high-frequency transformer and an output filter circuit, wherein the output end of the rectifying 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, and the output end of the control system is connected with the full-bridge inverter circuit through the driving circuit.

In one embodiment of the present application, the rectifier circuit is a three-phase uncontrollable rectifier bridge circuit.

In one embodiment of the application, the three-phase uncontrollable rectifier bridge circuit adopts an SKD100/16 rectifier bridge module of 6-unit modules; and a three-phase uncontrollable rectifier bridge circuit is arranged, the repeatable turn-off peak voltage is 1200V, and the effective value of the current is 25A.

In one embodiment of the present application, the input filter circuit includes a plurality of parallel filter capacitors.

In one embodiment of the present application, the core material of the high-frequency transformer is a ferrite material.

In one embodiment of the present application, the full-bridge inverter circuit includes a dc power supply, four switching tubes, four diodes, four junction capacitors, a resonant inductor Lr, a transformer T, an output filter inductor, a capacitor, and a load; two switching tubes form a leading bridge wall of the inverter circuit, and the other two switching tubes form a lagging bridge wall of the inverter circuit; the two switch tubes of the leading bridge arm are respectively connected with a capacitor in parallel; and capacitors are respectively connected in parallel to the two switch tubes of the hysteresis bridge arm.

In one embodiment of the present application, the switching tube is a SiC MOSFET.

In one embodiment of the present application, the capacitance values of the parallel capacitors of the hysteresis bridge arms are each 2.5 nF.

The beneficial effect of the invention is that,

the high-frequency alternating-current output phase-shifted full-bridge inverter provided by the invention reduces the opening loss, thereby reducing the overall loss of the inverter, improving the conversion efficiency of the inverter, improving the stability and reliability of a large power grid in the power transmission process and reducing the accident probability.

In addition, the invention has reliable design principle, simple structure and very wide application prospect.

Drawings

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a full-bridge inverter according to an embodiment of the present application;

FIG. 2 is a circuit schematic of a full bridge inverter according to one embodiment of the present application;

FIG. 3 is a circuit schematic of a rectifier circuit of a full bridge inverter according to an embodiment of the present application;

fig. 4 is a circuit schematic diagram of a full-bridge inverter circuit of a full-bridge inverter according to an embodiment of the present application.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, "a plurality" means two or more unless otherwise specified. In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.