Wide Output Range Power Processing Unit for Electric Propulsion

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNC06CA67C
Agency Tracking Number: 053319
Amount: $69,985.00
Phase: Phase I
Program: SBIR
Awards Year: 2006
Solicitation Year: 2005
Solicitation Topic Code: S8.04
Solicitation Number: N/A
Small Business Information
120 Commerce Drive, Unit 3, Fort Collins, CO, 80524-4731
DUNS: 102723348
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Geoffrey Drummond
 Principal Investigator
 (970) 482-0191
Business Contact
 Geoffrey Drummond
Title: President
Phone: (970) 482-0191
Email: Geoff@copwr.com
Research Institution
Hall thrusters can be operated over a wide range of specific impulse while maintaining high efficiency. However S/C power system constraints on electric propulsion systems often force a choice of maximum power operation over a narrow range of specific impulse and thrust. Most spacecraft users would desire a continuous selection of thrust and specific impulse at maximum power when possible, but power supply systems currently do not exist with this level of functionality. To provide continuous Hall thruster adjustment, a power supply must be wide ranging in voltage, current, and power. In addition, the power supply system must be lightweight and efficient. The proposed work addresses these needs through a three-phase resonant power conversion strategy combined with novel frequency selective output-stage circuitry that will allow greater than 8:1 output voltage adjustment at power levels up to and beyond 100-kW. Three-phase resonant power converters utilize filter components with lower mass and size relative to single-phase converters, and demonstrated efficiencies are greater than 97%. Additionally, resonant converters operate at higher frequency, which results in extended stability when used in dynamic load situations imposed by Hall thrusters. The proposed Phase I program will develop a prototype power supply and demonstrate its functionality.

* Information listed above is at the time of submission. *

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