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PPU’s for Next Generation EP
Brian Gilchrist, UMSteve Battel, Battel Engineering (consultant)Alec Gallimore, UMKen Arnett, UM-Space Physics Research LabOthers - TBD
Abstract – Present electric propulsion power processing unit (PPU) technology represent a major cost element in modern spacecraft electric propulsion systems. This is especially so because each spacecraft tends to have its own unique power bus. This suggests that a more versatile design architecture could be adopted that would allow greater spacecraft to spacecraft portability. This could provide a significant advantage in system development time, qualification, and ultimately cost savings. This also represents an excellent opportunity to explore advanced architectures and serve as a way to attract students to the aerospace power electronics profession. Michigan and consultant Battel Engineering, Inc. are proposing to collaborate with our industrial partners and others to address these issues.
PPU’s for Next Generation EP
• PPU architecture is highly customized and often specific for each mission and spacecraft– Can a more modular
approach be explored?– Can new architectures be
explored via the I-UCRC?• Attracting students to power
electronic systems is always a challenge– Can the I-UCRC help?
Background and Motivation
2 kW Space System Power Control UnitCourtesy Aerojet (For Public Release)
Michigan and Michigan Tech strong history of student space activities
SPRL Engineering Heritage
• Supported AOSS/SPRL PIs in the development of space research instruments since 1946
• Over 100 rocket, aircraft & balloon experiments developed to-date
• Over 35 major space instruments developed to-date
• Engineering & technical services provided to UM and industry
TIDI Flight Hardware for TIMED Mission
Home of SPRL Today
Early “Double Probes” flown on V2’s
PPU’s for Next Generation EP
Edmonson01//2008 AOSS/SPRL Engineering Introduction
Edmonson01//2008 AOSS/SPRL Engineering Introduction
SPRL Major Engineering Facilities• 63,000 sq. ft. Physical Plant• Large Class 10,000 High-Bay
Integration Clean Room• Large High-Bay Integration and Test
Laboratory• Electronics Fabrication Clean Room• Multiple Project Development
Areas• EMI/EMC Test Screen Room• Instrument Machine Shop w/ CNC
Capabilities• Thermal and Thermal-Vacuum Test
Chambers • Optical Test Laboratories
PPU’s for Next Generation EP
PPU’s for Next Generation EP
• Steven Battel – – President, Battel Engineering – Providing engineering, development and
review services to NASA, DOD, University, and Industrial clients
– 31 years experience– Over 200 electronic systems flown in space
• Areas of specialization – program management, systems engineering – power systems, high voltage systems– precision electronics design, scientific
instrument design, spacecraft avionics,
Battel Engineering
SAM Power Supply & HV Modules*
500W HV Power Supply Breadboard
*SAM Units fabricated at UM-SPRL
Phoenix/TEGA Electronics Development (Thermal Emission Gas Analyzer)
Analog and high voltage electronics designed and manufactured by SPRL in partnership with Battel EngineeringFlight electronics delivered for integration & test – 11/2005
NASA/Phoenix/Scout Mars Lander2007 launch, 2008 arrival
Edmonson01//2008 AOSS/SPRL Engineering Introduction
PPU’s for Next Generation EP
• Explore and prototype new PPU architectures – Promotes multiple mission capabilities– Maintains high end-to-end efficiency
• Engage graduate and undergraduate students in research– Attract students to power electronic systems
Objective of Research
PPU’s for Next Generation EP
• Form Working Group collaboration of UM/SPRL (prime), Battel Engineering (consulting) (possibly additional institutions) with industry partners– Focus on new PPU architectures/prototypes
• Recruit students from Michigan, Michigan Tech, and elsewhere– Support power system hands-on space system
student projects through mentoring and training– Guide most capable students to primary research
Technical Approach
PPU’s for Next Generation EP
• Credible new prototype PPU architectures defined
• Students engaged at graduate and undergraduate level– Students attracted to power electronic
profession
Anticipated Results