Full-bridge LLC resonant converter with double fault tolerant capability

Abstract

The invention discloses a full-bridge LLC resonant converter with double fault tolerant capability, which comprises two full-bridge LLC resonant circuits and two auxiliary diodes. The primary side of each full-bridge LLC resonant circuit is of a full-bridge circuit structure and the secondary side is of a full-wave rectification circuit structure. The two auxiliary diodes are power diodes used for realizing secondary side topology reconstruction in a secondary fault to ensure the normal operation of the converter. The converter of the invention realizes the first fault tolerance through a redundant circuit topology, utilizes the topology reconstruction to achieve the second fault tolerance, and has the capability of maintaining normal operation after two faults. The control strategy of the converter of the invention is simple, and the voltage current stress of the primary side switch tube does not increase before and after the fault, simplifying the system control and circuit parameter design and reducing the device cost. In addition, the primary side switch of the converter of the invention can realize zero voltage turn-on during operation, improving the efficiency of the converter and avoiding the electromagnetic interference caused by the hard switching.

Description

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AI Technical Summary

Benefits of technology

This patented invention improves an AC/DC convertor that overcomes issues such as insufficiently reliable performance when experiencing multiple failures or reduced component lifetime due to aging. It also includes feature for automatic switching between different circuits while reducing costs compared to previous designs. Additionally it uses advanced technologies like MOSFET (metal oxide semiconductors field effect transistor), BJT (bipolar junction transistors). Overall this innovation enhances its overall function capabilities and benefits.

Problems solved by technology

This patented technical problem addressed in this patents relates to providing a reliable and efficient power electronics solution for multimission airplanes while minimizing weight and environmental concerns associated therewith. Current solutions involve expensive components like generators or batteries due to their limited lifetimes. To address these issues, new technological concepts called MultiElectronics were developed. These innovations include developing smaller and lighter versions of conventional gasoline engines without sacrificing performance levels. However, they require higher voltages compared to older models. Therefore, the challenge lies in achieving both redundancy and reduced complexity in power electronically converters suitable for future flight regulations.

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