| 摘要: |
| 随着多电飞机（More Electric Aircraft,MEA）的快速发展，机载二次电源模块作为电能转换与分配的核心，需要解决3个问题：宽输入范围的动态适应性、极端温度环境的稳定运行能力，以及小体积高功率密度要求。采用BUCK+LLC全桥的双级拓扑结构，对BUCK电路最关键的电感参数和LLC全桥电路最关键的谐振腔参数进行专门设计和仿真，并在半砖尺寸2.5 in×2.4 in×0.5 in(1 in≈2.54 cm)限制下，将采用双板对插结构的裸电路板通过导热胶灌封至金属盒体内，研制了二次电源模块样机。经测试，样机满足宽幅输入电压（180~425 V）、宽温域（-55 ℃ ~+100 ℃）稳定可靠工作的要求，功率密度高达266 W/in3（1 in≈2.54 cm）。 |
| 关键词: 多电飞机(MEA) 机载二次电源模块 宽幅输入电压 双级拓扑 宽温域 高功率密度 |
| DOI：10.20079/j.issn.1001-893x.250724003 |
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| 基金项目: |
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| Design and Implementation of a Dual-stage Topology Aircraft Secondary Power Module |
| WANG Yubao |
| (Chengdu Spaceon Electronics Co.,Ltd.,Chengdu 610036,China) |
| Abstract: |
| With the rapid development of more electric aircraft(MEA),for the aircraft secondary power module serving as the core module for electrical energy conversion and distribution,There are three key challenges to be resolved:dynamic adaptation to a high-voltage wide-input range,stable operation in extreme temperature environments,and high power density within compact dimensions.The author proposes a dual-stage topology combining BUCK and LLC full-bridge circuits.Key parameters,specifically,the inductor in the BUCK circuit and the resonant tank in the LLC full-bridge circuit,are designed and simulated.The module adopts a dual-board interleaved configuration confined to a half-brick size 2.5 in×2.4 in×0.5 in(1 in≈2.54 cm)and is encapsulated with thermally conductive adhesive within a metal housing.Test demonstrates that the prototype achieves wide input voltage(180~425 V)and broad temperature tolerance(-55 °C~+100 °C)while maintaining stability and reliability.The power density reaches 266 W/in3(1 in≈2.54 cm). |
| Key words: more electric aircraft(MEA) aircraft secondary power module wide input voltage range hybrid topology wide temperature range high power density |
