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Diode voltage clamping type multi-level inverter using novel trigistor network

A switching network and voltage clamping technology, which is applied to electrical components, output power conversion devices, AC power input conversion to DC power output, etc., can solve the problems of inductance loss and large output harmonics

Inactive Publication Date: 2015-04-29
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

However, the inductance losses and output harmonics are still large

Method used

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  • Diode voltage clamping type multi-level inverter using novel trigistor network
  • Diode voltage clamping type multi-level inverter using novel trigistor network
  • Diode voltage clamping type multi-level inverter using novel trigistor network

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Embodiment Construction

[0027] The implementation of the present invention will be further described below in conjunction with the accompanying drawings and examples, but it is not intended to determine the key or important part of the present invention, nor is it intended to limit the scope of the present invention. With reference to the following description of the embodiments of the present invention in conjunction with the accompanying drawings, it will be easier to understand the above and other purposes, features and advantages of the present invention. of.

[0028] see Figure 1A , a diode voltage clamped multilevel single-phase half-bridge inverter using a new three-terminal switch network, including: two input power supplies (V1, V2), two input filter capacitors (C1, C2), four A power switch tube (S1, S2, S3, S4) and its body diode (D1, D2, D3, D4), an anti-phase coupled two-winding transformer T1, an output filter inductor L1 and an output filter capacitor C3, four power diodes (D5, D6, D7...

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Abstract

The invention discloses a diode voltage clamping type multi-level inverter using a novel trigistor network. The diode voltage clamping type multi-level inverter comprises a single-phase inverter and a three-phase inverter. A diode voltage clamping type multi-level single-phase half-bridge inverter using the novel trigistor network comprises four power switch tubes, body diodes of the power switch tubes, two input filtering capacitors, a reversely coupled two-winding transformer, an output filtering inductor, a filtering capacitor and four power diodes. Compared with universal two-level or conventional diode voltage clamping type multi-level inversion topology, the diode voltage clamping type multi-level inverter has the advantages that the power switch tubes of an upper bridge arm and a lower bridge arm can be simultaneously turned on to work without arranging a dead zone between the power switch tubes; multi-level output is realized at an inversion midpoint, thus improving harmonic waves of output voltage, reducing the size and the volume of the output filtering inductor and reducing the loss of a switching device; therefore, the cost of system materials is reduced and the system performance of the inverter is improved.

Description

technical field [0001] The invention relates to a multilevel inverter, in particular to a diode voltage clamping multilevel inverter (including single-phase inverter and three-phase inverter) using a novel three-terminal switch network. Background technique [0002] Inverters convert direct current to alternating current. Inverters are an important part of uninterruptible power supplies (UPS) and new energy power generation systems such as wind energy, solar photovoltaic, and fuel cells. Conversion efficiency and output harmonics are the most important electrical indicators of the inverter. High conversion efficiency can reduce power loss, and low harmonics can improve power quality. [0003] The loss of power devices and output filter inductors in the inverter limits the improvement of inverter efficiency. At the same time, fierce market competition, rising prices of raw materials such as power switch tubes and steel and copper have brought great cost pressure to inverter...

Claims

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Application Information

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IPC IPC(8): H02M1/32
CPCH02M7/53871
Inventor 胡炎申谢运祥
Owner SOUTH CHINA UNIV OF TECH
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