High-power dc-dc converter based on dual active bridge circuit for aviation and its health management method

Abstract

The present invention proposes a high-power DC-DC converter based on dual active bridge circuits for aviation and its health management method. The converter is used to change the input voltage of the rated input 270VDC on the aircraft to the rated output voltage of 28VDC, and the airborne equipment provides Power supply. The system is realized based on a dual active bridge circuit, which has the advantages of high efficiency, simple control mode, and light weight; it adopts 4-module parallel working mode, and supports a maximum output power of 12kW. The modular design is not only easy to achieve high power output, but also can form a power supply system of any power level, which improves the flexibility of the power supply system and facilitates the realization of serialization, platformization and standardization of products. The health management technology is integrated inside the converter. By analyzing and processing the status parameters of the converter collected in real time during operation, the health status of the system is evaluated, and the remaining life of the internal prone to failure power switch tube is predicted. Maintenance suggestions and health management services are proposed, thereby improving the reliability of the entire system and reducing maintenance costs.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to an aviation high-power DC-DC converter based on dual active bridge circuits and a health management method thereof. Background technique [0002] The 270V high-voltage DC power supply system has the advantages of high efficiency, simple structure, high energy conversion efficiency, high power density, easy realization of uninterrupted power supply, and safe use. It has become the main power supply system of the fourth-generation and future fifth-generation machines. With the increase in the diversity of electrical loads in multi-electric aircraft, the requirements for secondary power supplies for large-capacity electrical equipment are gradually increasing. At this stage, DC-DC converters with low and medium power can no longer meet the development needs of modern multi-electric aircraft. Therefore, research on high-reliability and high-efficiency 270V to 28V high-power DC-DC con...

AI Technical Summary

Problems solved by technology

Considering the special working environment of military aircraft (high voltage environment, sudden change in wide temperature range, shock, vibration and electromagnetic radiation) and the internal factors of the converter itself (surge current, surge voltage and sudden load unloading), these Factors often cause the state parameters of key modules of the power system to degrade, resulting in poor system performance and structural failures

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