导　　师： 吕征宇

学科专业： 080804

授予学位： 硕士

作　　者： ;

机构地区： 浙江大学

摘　　要： 本文深入分析了航空、航天领域高功率密度高效率直流电源的应用特点,针对一种空间应用的kW级高功率密度电源,研究了包括主功率电路原副边拓扑及其控制方式选择,主功率平面变压器匝比设计、电源整机效率计算、电源模块热优化设计及其快速、可靠的电压／电流保护策略等关键问题,并提出了整体设计及其实验解决方案。 结合该电源的整体设计思路和设计方案,本文在两版样机上进行了电路实验和设计优化,实验结果也充分证明了该设计思路的可行性。同时,本文就主功率平面变压器设计,输出过流保护、高频驱动策略及其副边整流二极管吸收网络设计等关键问题给出了完整的解决方案,并在样机上进行了验证,为kW级空间电源的开发提供了设计参考。 最后,为了进一步优化kW级空间电源的效率及其功率密度,本文针对效率优化、热设计优化、输出电压纹波优化三个关键问题提出了后续该空间电源单元可行的优化及其解决措施,为kW级高功率密度高效率空间电源的进一步发展提供了改进的思路。 Based on the analysis for the requirement of the high power density high efficiency power supply in space applications, this paper, within the space utilities and applications, studies several critical issues on design guides and considerations, which includes main power primary and secondary topologies selection guide, main power planer-core-transformer turns ratio selection and construction, total loss calculation, thermal design and optimization, fast and reliable voltage//current protection. What is more, this paper proposes a thorough design solution for experiment. With the design guide mentioned above, two versions of prototypes and experiment are carried out, and the experimental results confirm the feasibility of the initial design. Besides, this paper also presents thorough solutions for several critical design bottlenecks and validates them in the two prototypes, which include main power planer core transformer design, output current protection, high performance power MOSFETs drive with high frequency and low loss, and snubber design for secondary side rectifiers. All of these works do offer valuable data for the development of kWs level high power density power supply in space application. At last, in order to enhance the performance of this kWs level power supply, this paper also proposes solutions for optimizing efficiency, thermal management, and output voltage ripple for the future works on high power density Dc-Dc power supply in space application.

关 键 词： 空间电源 热设计 平面变压器 高功率密度 吸收网络

分 类 号： [TN86]

领　　域： [电子电信]