Development and Testing of a 20 kW Moving Packed-Bed Particle-to-sCO2 Heat Exchanger and Test Facility.
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Possible design of RF coupler with low cryogenic loading is presented. Design parameters: 500kW, CW, 650MHz.
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Vertical GaN (vGaN) technology leverages a fully conductive 3D semiconductor structure, enabling superior power density compared to GaN-on-Si and other wide bandgap devices. It offers a pathway to surpass cost and efficiency limitations of Si and SiC devices in traction applications. However, scaling for high-voltage, high-power systems remains challenging. This paper presents the design of an 800V, 200kW traction inverter utilizing vertical GaN devices. The inverter achieves ultra-high efficiency (> 99.5%) through advanced power module integration and employs multilevel neutral-point-less X-type (NPL.X) inverter topology to ensure optimal traction drive system performance. These innovations demonstrate the potential of vGaN for nextgeneration electric propulsion systems.
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Feasibility of 20 watt/pound solar cell area - array models, cost estimates, fabrication of assemblies, and large-scale production of cells
High-frequency dc-dc converter for ion thrustors using modular design and inductive energy pumping technique for conversion, regulation, and protection
High power testing of S-band Cassegrain monopulse cone antenna
Electric properties of fuel cell power systems to meet short and long mission requirement
Self-contained laboratory power source providing output of 150 to 800 MHz
Alkali metal Rankine cycle space power system component and systems design
Design and hardware of restraining and deploying mechanism for solar array of Mars flyby mission
Performance tests of Brayton cycle electrical subsystem for spacecraft power supplies
Electrically propelled spacecraft designs using thermionic reactors as electrical power source investigated for Halley Comet rendezvous mission
Design and development of electrically propelled spacecraft based on external-fuel reactor concepts for thermionic reactors - Vol. 2
Steady state and transient performance of Brayton cycle alternator and electronic controls for space power