JAXA Repository / AIREX 未来へ続く、宙(そら)への英知
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titleTethered solar power satellite
Other Titleテザー太陽パワー衛星
Author(jpn)佐々木 進; 田中 孝治; 樋口 健; 奥泉 信克; 川崎 繁男; 篠原 真毅; 泉田 啓; 石村 康生
Author(eng)Sasaki, Susumu; Tanaka, Koji; Higuchi, Ken; Okuizumi, Nobukatsu; Kawasaki, Shigeo; Shinohara, Naoki; Senda, Kei; Ishimura, Kosei
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; 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; 東海大学; 京都大学; 金沢大学; 北海道大学
Author Affiliation(eng)Japan Aerospace Exploration Agency Institute of Space and Astronautical Science; Japan Aerospace Exploration Agency Institute of Space and Astronautical Science; Japan Aerospace Exploration Agency Institute of Space and Astronautical Science; Japan Aerospace Exploration Agency Institute of Space and Astronautical Science; Tokai University; Kyoto University; Kanazawa University; Hokkaido University
Issue Date2004-03
PublisherJapan Aerospace Exploration Agency (JAXA)
Publication date2004-03
AbstractA solar power system, in which a large flat panel with a capability of power generation and transmission is suspended by multi-wires, is proposed as an innovative Solar Power Satellite (SPS). This SPS concept is highly robust and potentially low cost, with special features in the integration, construction, attitude control, heat management, and evolutional development strategy. The power generation and transmission panel is composed of a huge number of perfectly equivalent modular panels, that is essential for low-cost mass production. The electric power generated by the solar cells at the surface of each module is converted to the microwave power in the same module. There are no wired signal/power interfaces between the modules. All modules are controlled by a wireless LAN system. The wireless interface between the modules leads to easy deployment and integration. Since the solar light is not concentrated in this configuration, quite different from the recent SPS concepts equipped with condensing lens or mirrors, the temperature of the module is kept within an operational range for the commercial electrical parts without any active heat rejection. The attitude in which the microwave transmission antenna is directed to the ground is automatically maintained by the gravity gradient force of the suspension system. The tethered panel is composed of individual tethered sub-panels which are loosely connected to each other. This configuration enables an evolutional construction in which the function of the SPS grows as the construction proceeds. A scale model of the tethered sub-panel can be used for the first step demonstration experiment of the SPS in the near future. The demonstration experiment can verify the power transmission from the orbit to the ground, which is the most important subject at this stage of the SPS research. This concept of the SPS has disadvantages that the power to the ground varies with the local time and the working ratio is 64 percent on the average as compared with the sun-pointing type SPS, but they are well compensated by the advantages in the electrical, mechanical, thermal and integration aspects.
DescriptionJAXA Research and Development Report
Keywordstethered solar power satellite; solar generator; attitude control; systems integration; low cost; module; mass production; テザー太陽パワー衛星; 太陽発電; 姿勢制御; システムインテグレーション; 低コスト; モジュール; 大量生産
Document TypeTechnical Report
JAXA Category研究開発報告
Report NoJAXA-RR-03-005E

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