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Dual-input bidirectional inverter with high reliability and high energy efficiency

A bidirectional inverter, reliable technology, applied in the direction of converting AC power input to DC power output, output power conversion devices, electrical components, etc., can solve the complex system structure, reduce system efficiency and reliability, and increase system losses. And other issues

Inactive Publication Date: 2018-08-24
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This not only leads to complex system structure, but also increases system loss, reduces system efficiency and reliability

Method used

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  • Dual-input bidirectional inverter with high reliability and high energy efficiency
  • Dual-input bidirectional inverter with high reliability and high energy efficiency
  • Dual-input bidirectional inverter with high reliability and high energy efficiency

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Embodiment Construction

[0074] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0075] The high-reliability and high-energy-efficiency dual-input bidirectional inverter of the present invention is composed of a first DC input voltage source (V in1 ), the second DC input voltage source (V in2 ), the first switching tube (S 1 ), the second switching tube (S 2 ), the third switching tube (S 3 ), the fourth switching tube (S 4 ), the fifth switching tube (S 5 ), the sixth switching tube (S 6 ), the first diode (D 1 ), the second diode (D 2 ), the third diode (D 3 ), the fourth diode (D 4 ), the first filter inductor (L 1 ), the second filter inductor (L 2 ), filter capacitor (C o ) and load (Z load )constitute.

[0076] The above two DC input voltage sources (V in1 ~V in2 ), six switching tubes (S 1 ~S 6 ), four diodes (D 1 ~D 4 ), two filter inductors (L 1 ~ L 2 ), filter capacitor (C o ) and load (Z load ) is connected in a...

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Abstract

The invention discloses a dual-input bidirectional inverter with high reliability and high energy efficiency, and belongs to the technical field of a power electronic converter. The converter comprises two DC input voltage sources (V<in1>-V<in2>), six switch tubes (S1-S6), four diodes (D1-D4), two filtering inductors (L1-L2), a filtering capacitor (Co) and a load (Z<load>). Power is simultaneouslysupplied to an AC load or supplied to the AC load according to time from the two independent DC input sources only by the inverter, the functions of the two single-input inverters are achieved, and the inverter has the advantages of high integration, high efficiency and low cost. Each high-frequency switch bridge arm is formed by connecting a switch tube and a diode in series, the problem of bridge arm direct through is prevented, and high reliability is achieved; various levels can be generated in a middle point of the bridge arm, and the switch loss and the volume of a filter are favorablyreduced; and an output can work within four quadrants of a current voltage, and the application range is wider than that of a two-quadrant gird-connected inverter.

Description

technical field [0001] The invention relates to a high-reliability, high-energy-efficiency dual-input bidirectional inverter, which belongs to the technical field of power electronics, and in particular to the technical field of DC-AC power conversion. Background technique [0002] In recent years, as aerospace, new energy power generation, and smart grids have higher and higher requirements for power supplies, scholars at home and abroad have increasingly studied high-reliability and high-efficiency inverter power supplies. The traditional inverter bridge arm is composed of two switching tubes connected in series. Because it is directly connected to both ends of the DC source, there is a potential for the bridge arm to pass through and cause a short circuit of the power supply. In order to reduce the risk of bridge arm shoot-through, a dead time is usually added, and the addition of the dead time will introduce low-order harmonics and reduce the quality of the output wavefo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/797
Inventor 杨帆葛红娟于兆龙吴红飞
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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