Switch coupling inductor soft switching single-stage boost inverter with high voltage gain

A technology of coupled inductors and inverters, which is applied in the field of switching coupled inductor soft-switching single-stage boostable inverters and DC-AC inverters. Efficiency is greatly affected and other issues, to achieve the effects of small electromagnetic interference, improved efficiency, and less loss

Inactive Publication Date: 2014-08-20
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the ringing of the leakage inductance of the coupled inductor and the presence of parasitic inductance in the line, the voltage stress of the switching device is higher and generates more electromagnetic interference (EMI)
Leakage and parasitic inductances cause v

Method used

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  • Switch coupling inductor soft switching single-stage boost inverter with high voltage gain

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Embodiment

[0011] The main structure of this embodiment includes a DC power supply V in , inductance L 1 , the first capacitance C 1 , the second capacitance C 2 , the first rectifier diode D 7 , the second rectifier diode D 8 , by the first winding L a with the second winding L b Composed of coupled inductors and insulated gate bipolar transistors (IGBT) S 1 ~S 6 with antiparallel diode D 1 ~D 6 Combination of three-phase voltage type bridge inverter circuit; the first winding L of the coupled inductor a with the second winding L b The terminals of the same name each other, the inductance L 1 One end of the DC power supply V in connected to the positive pole, the inductor L 1 The other end of the second capacitor C 2 connected to the negative pole, the second capacitor C 2 The anode of the three-phase voltage type bridge inverter circuit is connected, the first rectifier diode D 1 The cathode of the coupled inductor with the second winding L b connected, the first recti...

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Abstract

The invention belongs to the technical field of DC-AC inversion equipment and relates to a switch coupling inductor soft switching single-stage boost inverter with high voltage gain. A first winding and a second winding are dotted terminal, one end of an inductor is connected with the positive electrode of a DC power source, the other end of the inductor is connected with the negative electrode of a second capacitor, the positive electrode of the second capacitor is connected with a three-phase voltage bridge type inverter circuit, the negative electrode of a first rectifier diode is connected with the second winding of a coupling inductor, the first rectifier diode and the coupling inductor are connected at the two ends of the second capacitor in parallel after being connected in series, the positive electrode of a second rectifier diode is connected with the positive electrode of the first rectifier diode, the negative electrode of the second rectifier diode is connected with the common terminal of the first winding and the second winding and the positive electrode of a first capacitor, and the negative electrode of the first capacitor is connected with the negative electrode of the DC power source and the three-phase voltage bridge type inverter circuit. The switch coupling inductor soft switching single-stage boost inverter with the high voltage gain is simple in structure, small in electromagnetic interference influence, low in loss, low in cost, high in energy conversion efficiency and friendly to work environment.

Description

Technical field: [0001] The invention belongs to the technical field of DC-AC inverter equipment, and relates to a DC-AC inverter, in particular to a switch-coupled inductance soft-switching single-stage boostable inverter with high voltage gain. Background technique: [0002] The existing improved transformer type Z-source inverter includes an inductor, two capacitors, a rectifier diode, a coupled inductor and a three-phase voltage type bridge inverter circuit. This improved transformer type Z-source inverter The input current continuity and step-up ratio of the traditional Z-source inverter / quasi-Z-source inverter are improved. However, due to the ringing of the leakage inductance of the coupled inductor and the presence of parasitic inductance in the line, the voltage stress of the switching device is higher and generates more electromagnetic interference (EMI). Leakage and parasitic inductances cause voltage spikes and ringing in the DC link voltage, which can damage ac...

Claims

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Application Information

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IPC IPC(8): H02M7/5387
CPCY02B70/1491Y02B70/10
Inventor 丁新平吴苓芝魏文健
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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