Single Converter Hall Thruster Power Processor
Small Business Information
11 Tech Circle, Natick, MA, 01760
Abstract"The need for low mass, cost and complexity electric propulsion systems driven by the growing interest in microsatellites to perform high delta-V missions requiring north/south station keeping, orbit transfer, inclination changes and precise formationflying can be enabled by Busek's multi-mode low power Hall thruster. However, state-of-the-art electric propulsion technology is complex and costly for many mission applications. Of the subsystems that comprise the propulsion system, the most fruitful toachieve a significant reduction in cost, complexity and mass is the power processing unit.In Phase I, Busek will demonstrate the feasibility of a new power processing architecture that replaces the four (4) main DC to DC converters of the conventional PPU with a single converter architecture.The single converter design utilizes a high power converter to provide the discharge power to the thruster and both heat and start the cathode. The proposed converter topology will be a derivative of Busek's nominal 500 W (350 V; 1.5 A) dischargeconverter developed and demonstrated as part of the AFRL/VS TechSat 21 mission. In addition Busek will develop a modified cathode design capable of heating at low input current. Experiments will be performed to develop a starting sequence and operatingalgorithm for the thruster. The long-term objective is to develop a simplified flight qualification low power Hall thruster system with high performance and
* information listed above is at the time of submission.