Main circuit topology of tri-electrical-level double-dropping type semi-bridge inverter and control method thereof

A half-bridge inverter, three-level technology, applied in the direction of converting irreversible DC power input to AC power output, can solve the problems of power tube pass-through and high-frequency performance limitations, and achieve widening application scope, The effect of broad application prospects
CN100431255CInactive Publication Date: 2008-11-05NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2008-11-05
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The present invention is one inverter includes one step-down modulating and filtering output circuit comprising one power source, two power switching transistors, filtering inductor, filtering capacitor and two freewheeling diodes; and one other step-down modulating and filtering output circuit comprising one other power source, two other power switching transistors, one other filtering inductor, the said filtering capacitor and two other freewheeling diodes. In the circuit, each power switching transistors has a voltage stress only one time that of the output voltage, and from the bridge arm, three-state voltage waveform may be output, so that low voltage HF power transistors may be used for high switching frequency, reduced volume and weight and fast dynamic response. The present invention proposes no-bias current half-period operation mode of the inverter with optimized operation efficiency and corresponding control method.
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Description

Technical field:

[0001] The invention relates to a main circuit topology of a three-level double-buck half-bridge inverter and a control method thereof. Background technique:

[0002] With the development of high-frequency power devices, the switching frequency of inverters has been greatly increased, and the development of AC power sources such as aviation power supplies, UPS systems, and high-performance motor drives has put forward higher requirements for the performance of inverters. How to achieve high frequency inverter while ensuring high efficiency is the key issue of current research. Soft switching technology can effectively reduce the switching loss of the converter. In the past ten years, domestic and foreign scholars have done a lot of research on the soft switching problem of inverters, and have obtained many valuable research results. There are mainly polar resonant inverters, resonant DC high frequency link inverters, resonant buffer network inverters and s...

Claims

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