JAXA Repository / AIREX 未来へ続く、宙(そら)への英知

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Other TitleSupercapacitor-based spacecraft power system
Author(jpn)鵜野 将年; 豊田 裕之
Author(eng)Uno, Masatoshi; Toyota, Hiroyuki
Author Affiliation(jpn)宇宙航空研究開発機構 宇宙科学研究本部; 宇宙航空研究開発機構 宇宙科学研究本部
Author Affiliation(eng)Japan Aerospace Exploration Agency (JAXA) Institute of Space and Astronautical Science (ISAS); Japan Aerospace Exploration Agency (JAXA) Institute of Space and Astronautical Science (ISAS)
Issue Date2008-05
PublisherInstitute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
Publication title第27回宇宙エネルギーシンポジウム 平成19年度
The Twenty-seventh Space Energy Symposium
Start page16
End page20
Publication date2008-05
AbstractThe power sources which have long life performances are strongly desired for deep space explorations, advanced missions and so forth. Spacecrafts ordinarily employ chemical batteries such as Ni-Cd, Ni-MH and Li-ion batteries as their power sources. Chemical batteries which store electricity by chemical reactions, however, have technical problems in the case of the very long term applications. SuperCapacitors (SCs) which are prosperously developed in the civilian field are the energy storage devices without chemical reactions. SCs have long life performances and high rate charge/discharge performances. In recent years, SCs have been applied for EVs (Electric Vehicles), UPSs (Uninterrupted Power Sources), assist power sources and so forth. In the space field, SCs were already applied to the exploration robot 'MINERVA' which was equipped to the interplanetary spacecraft 'Hayabusa (MUSES-C: Asteroid Sample-return Spacecraft)'. SCs received much attention to be applied to the very long term missions such as Space Solar Power Systems (SSPS). SCs are promising not only for commercial applications but also aerospace applications. Main drawback of SCs is that terminal voltages vary directly with stored energies. In order to adequately utilize stored energies of SCs, discharges should be as deep as possible. On the other hand, output voltage of series-connected SCs should be limited within particular range for instruments to perform appropriately. A proposed SC-based spacecraft power system is a combination of dc-dc converter and tap selector. In this paper, the power system which can utilize energies of SCs as much as possible with limiting output voltage variations within particular range is proposed and is experimentally verified using a simple circuit. Moreover, new method of controlling solar cell output power using the tap selector is also proposed.
Keywordsspacecraft power supply; storage battery; accelerated life test; supercapacitor; DC/DC converter; solar cell; energy conversion efficiency; electric discharge; 宇宙機給電; 蓄電池; 加速寿命試験; スーパーキャパシタ; DC/DCコンバータ; 太陽電池; エネルギー変換効率; 放電
Document TypeConference Paper
JAXA Categoryシンポジウム・研究会

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