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Development of a power electronics controller for the advanced stirling radioisotope generator
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Leland, Douglas K. Priest, Joel F. Keiter, Douglas E. Schreiber, Jeffrey G. |
| Copyright Year | 2008 |
| Description | Under a U.S. Department of Energy program for radioisotope power systems, Lockheed Martin is developing an Engineering Unit of the Advanced Stirling Radioisotope Generator (ASRG). This is an advanced version of the previously reported SRG110 generator. The ASRG uses Advanced Stirling Convertors (ASCs) developed by Sunpower Incorporated under a NASA Research Announcement contract. The ASRG makes use of a Stirling controller based on power electronics that eliminates the tuning capacitors. The power electronics controller synchronizes dual-opposed convertors and maintains a fixed frequency operating point. The controller is single-fault tolerant and uses high-frequency pulse width modulation to create the sinusoidal currents that are nearly in phase with the piston velocity, eliminating the need for large series tuning capacitors. Sunpower supports this effort through an extension of their controller development intended for other applications. Glenn Research Center (GRC) supports this effort through system dynamic modeling, analysis and test support. The ASRG design arrived at a new baseline based on a system-level trade study and extensive feedback from mission planners on the necessity of single-fault tolerance. This paper presents the baseline design with an emphasis on the power electronics controller detailed design concept that will meet space mission requirements including single fault tolerance. |
| File Size | 1221417 |
| Page Count | 19 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20080015547 |
| Archival Resource Key | ark:/13960/t89h0mx10 |
| Language | English |
| Publisher Date | 2008-02-01 |
| Access Restriction | Open |
| Subject Keyword | Spacecraft Propulsion And Power Controllers Fault Tolerance Space Missions Stirling Cycle Capacitors Feedback Mission Planning Sine Waves Frequencies Pulse Duration Modulation Isotopes Tuning Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
