High power DC-DC converter based on aviation dual-active bridge circuit and health management method thereof

Abstract

The invention provides a high power DC-DC converter based on aviation dual-active bridge circuits and a health management method thereof. The converter is used for changing an input voltage of onboardrated input 270VDC into a 28VDC rated output voltage. Onboard equipment provides a power supply. A system is realized based on the active bridge circuits and has the advantages of high efficiency, concise control mode and light weight. A four-module parallel working mode is employed. The supported maximum output power is 12kW. Through modular design, high power output is easy to realize. A powersupply system of any power level can be formed. Flexibility of the power supply system is improved. Product serialization, platformization and standardization are easy to realize. A health managementtechnology is integrated into the converter, through analysis and processing of various state parameters which are collected in real time when the converter operates, a health state of the system is evaluated, residual life of an internal power switch tube which is easy to lose efficacy is predicted, a maintenance suggestion is provided, and health management service is put forward, so working reliability of the whole system is improved and maintenance cost is reduced.

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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