摘要： 针对某空间低温制冷机对DC-DC变换器提出的高功率密度、高效率和高可靠的要求，设计了一种适用于制冷机的大功率交错并联Buck变换器。详细阐述了交错并联Buck变换器的设计过程，并成功研制出一台额定功率800 W的产品，在峰值功率下实现了95%的转换效率，实现了高效率的设计目标，验证了理论分析和方法的正确性。该电路经过测试验证满足性能指标要求，并成功应用于飞行任务，为后续大功率变换器的设计提供了参考。

中图分类号：TM46 文献标志码：A DOI: 10.16157/j.issn.0258-7998.257103
中文引用格式： 吴临玉，康端刚，王旭升. 宇航用大功率交错并联Buck变换器设计与实现[J]. 电子技术应用，2026，52(4)：121-126.
英文引用格式： Wu Linyu，Kang Duangang，Wang Xusheng. Design and implementation of a high-power interleaved buck converter for aerospace applications[J]. Application of Electronic Technique，2026，52(4)：121-126.

Design and implementation of a high-power interleaved buck converter for aerospace applications

Abstract： A high-power interleaved parallel buck converter suitable for a low-temperature refrigeration unit in a certain space was designed to meet the requirements of high power density, high efficiency, and high reliability for DC-DC converters. This article elaborates on the design process of the interleaved parallel buck converter and successfully develops a product with a rated power of 800 W. It achieves a conversion efficiency of 95% at peak power, achieving the design goal of high efficiency and verifying the correctness of theoretical analysis and methods. The circuit has been tested and verified to meet the performance requirements, and has been successfully applied to model flight missions, providing reference for the design of subsequent high-power converters.

Key words : high-power converter；buck converter；interleaved parallel connection；high efficiency