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Dual Input Single Phase Inverter

A single-phase inverter, dual-input technology, applied in the field of power electronics, DC-AC power conversion, can solve the problems of a large number of active and passive devices, complex control, etc., to improve waveform quality, high conversion efficiency, cost reduction effect

Active Publication Date: 2017-12-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above solution realizes the simultaneous connection of multiple distributed DC power sources and the AC power grid, the number of active and passive components used is large and the control is complicated

Method used

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  • Dual Input Single Phase Inverter
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  • Dual Input Single Phase Inverter

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings.

[0034] The dual-input single-phase inverter of the present invention consists of a first switch bridge arm (1), a second switch bridge arm (2), a third switch bridge arm (3), a fourth switch bridge arm (4), and a filter output circuit ( 20), the first DC input source (V in1 ) and a second DC input source (V in2 ) configuration, the first switch bridge arm (1), the second switch bridge arm (2), the third switch bridge arm (3) and the fourth switch bridge arm (4) have the same structure and include a positive terminal and a negative terminal and N-terminal.

[0035] The first switch bridge arm (1), the second switch bridge arm (2), the third switch bridge arm (3), the fourth switch bridge arm (4), the filter output circuit (20), the first DC input source (V in1 ) and a second DC input source (V in2 ) connection relationship can adopt any of the following four scheme...

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Abstract

The invention discloses a double-input single-phase inverter, and belongs to the technical field of power electronics. The double-input single-phase inverter is composed of two individual direct-current input sources, four switch bridge arms and a filter output circuit, wherein each switch bridge arm is respectively formed by connecting two power switch tubes in series; and the filter output circuit is composed of a filter inductor, a filter capacitor and load. According to the double-input single-phase inverter disclosed by the invention, the condition that the two individual direct-current input sources provide electricity to alternating-current load or a direct-current power grid in a time-sharing manner or simultaneously can be realized; the functions of two inverters are realized; and the double-input single-phase inverter has the advantages of high power density and low volume cost. The two switch bridge arms in the double-input single-phase inverter share input voltage in common; the switch tubes in the switch bridge arms can naturally realize low voltage clamp and voltage stress; and the double-input single-phase inverter can generate a plurality of high-frequency levels for the filter output circuit, and contributes to reduction of the volume and the weight of an output filter and improvement of the power density.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to the technical field of DC-AC power conversion. Background technique [0002] Inverters are power conversion devices that realize DC-AC power conversion. They are widely used in various fields of the national economy such as renewable energy grid-connected power generation, motor drives, smart micro-grids, power systems, and uninterruptible power supplies. [0003] A traditional inverter only includes a DC input terminal and an AC output terminal, that is, it can only realize power conversion between a DC input source and an AC load or an AC grid. However, in applications such as renewable energy power generation and uninterruptible power supply, it is usually necessary to realize DC-AC power conversion between multiple DC input sources and AC loads or AC grids. For example, in a distributed photovoltaic power generation system, each distributed photovoltaic power supply needs to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/487H02M7/5387H02M7/5395
Inventor 吴红飞韩蒙
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS