摘要
深空探测器离子电推进系统电源处理单元(Power Processing Unit,PPU)需要适应宽范围电压输入、宽范围电压输出和功率输出,造成PPU的元器件应力增加、体积重量增加和效率降低。针对我国小天体探测器离子电推进PPU中核心模块屏栅电源输入电压60~110 V、输出电压420~1260 V、输出电流0.3~2.1 A的指标需求,从功率模块分解、软开关拓扑选择、单级功率变换器拓扑设计和两级功率变换器拓扑设计方面研究了屏栅电源的设计,提出了在效率、体积和可靠性方面综合优化的方案,对屏栅单个功率模块的设计开展了实物验证。得出:采用优化的模块分解,将输出电压固定,能有效降低元器件应力、优化变换器工作点效率以及提高变换器的可靠性;移相全桥和全桥LLC在设计宽范围输入变换器时存在半导体功率元器件电应力高和磁性元器件加工困难等问题;采用BUCK或BOOST+全桥LLC的两级拓扑方案,能简化高压整流电路的应力,同时适应宽范围输入电压,是宽范围输入输出屏栅电源优选的方案。
The power processing unit(PPU)of ion electric propulsion system on the deep space detector needs to adapt to wide range voltage input,wide range voltage output and wide range power output,which results in the increase of component stress,volume and weight and decrease of efficiency of PPU.According to the requirements of grid power supply for ion electric propulsion PPU of small objects detector in China,the input voltage is 60~110 V,the output voltage is 420~1260 V,and the output current is 0.3~2.1 A.In this paper,the design of grid power supply is studied from the aspects of power module decomposition,soft switching topology selection,single-stage power converter topology design and two-stage power converter topology design.A comprehensive optimization scheme in efficiency,volume and reliability is proposed.The physical verification of the design of single power module of grid power supply is carried out.The results show that the optimized module decomposition and fixed output voltage can effectively reduce the component stress,optimize the efficiency of the converter working point and improve the reliability of the converter;when using the single-stage phase shifted full bridge and full bridge LLC to design wide range input converters,there are still some problems,such as high stress of semiconductor power components,high capacitance stress,and difficult processing of magnetic components;the buck/boost+full bridge LLC two-stage topology scheme can simplify the stress of high-voltage rectifier circuit and adapt to wide range input.It is a preferred scheme for wide range input and output Beam power supply.
作者
陈昶文
武荣
CHEN Changwen;WU Rong(Lanzhou Institute of Space Technology Physics,Lanzhou 730000,China)
出处
《深空探测学报（中英文）》
2020年第4期407-416,共10页
Journal Of Deep Space Exploration
关键词
深空探测
电推进
电源处理单元
PPU
屏栅电源
deep space explorer
electric propulsion
power processing unit
PPU
beam power supply
作者简介
陈昶文(1991-),男,工程师,主要研究方向:航天器二次电源及电推进电源处理单元。通讯地址:兰州市飞雁街100号二次电源事业部(730000),电话:(0931)4585313,E-mail:xbwenwen@qq.com。
