Search Results - philippe+adell

6 Results Sort By:
Highly Reliable Intelligent Intermediate Bus Converter for Space Systems
Background Conventional pulse-width modulation (PWM) control techniques such as voltage-mode DC-DC converters are susceptible to single event effects (SEE) of radiation in harsh environments due to their inherent analog nature. Digital controllers, on the other hand, are more immune to SEEs than their voltage-mode analog counterparts. Current-mode...
Published: 7/31/2024   |   Inventor(s): Philippe Adell, Bertan Bakkaloglu, Bhushan Vijay Talele, Shashank Alevoor, Rakshit Dambe Nayak
Keywords(s): Materials and Electronics
Category(s): Physical Science, Manufacturing/Construction/Mechanical, Wireless & Networking, Applied Technologies
PMU-Embedded Analytics for Online Event Detection and Classification in Power Grids
The energy requirement of the world is increasing exponentially every year. With the power demand sites concentrated in the region with the highest population density, energy production sites must be located remotely. This isolation requires lengthy and complicated grids to be designed and manufactured to transmit power over long distances. Grid failures...
Published: 7/30/2024   |   Inventor(s): Payman Dehghanian, Shiyuan Wang, Li Li
Keywords(s):  
Category(s): Technology Classifications > Industrial or Consumer Tech > Energy Infrastructure and Environment
Predicting Radiation Effects and Total Ionizing Dose in Bipolar Junction Transistor Circuits
Background Bipolar transistors are used extensively for analog circuits utilized in spaceborne applications. However, this region of space, including the higher reaches of Earth's atmosphere, is populated by many high-energy particles that can damage the bipolar transistors. In such environments, radiation induces a large increase in bipolar base...
Published: 8/9/2024   |   Inventor(s): Hugh Barnaby, Philippe Adell, Blayne Tolleson
Keywords(s): Materials and Electronics
Category(s): Physical Science, Computing & Information Technology, Environmental, Semiconductor Devices
A Programmable Digitally Controlled Point-of-Load DC-DC Buck Converter Suitable for Space Applications
Buck converters are essential to modern electronics as they can maintain an output voltage at a desired range. Two of the main methods to accomplish this are hysteretic control and pulse width modulation (PWM). Hysteretic controllers continually monitor the output voltage and adjust it if it is too high or too low, but have bad frequency control. On...
Published: 2/23/2023   |   Inventor(s): Bertan Bakkaloglu, Ming Sun, Philippe Adell
Keywords(s): Fuel Cells, Energy, Materials and Electronics
Category(s): Computing & Information Technology, Physical Science
Distributed Feedback Fiber Laser Pumped by Multimode Diode Lasers
Researchers at the University of Arizona College of Optical Sciences and Canada's Carleton University recently succeeded in fabricating high reflectivity (>99%) Fiber Bragg Gratings (FBGs) into phosphate glass fibers using UV light and a phase mask technique. With this new manufacturing technique, fiber lasers can be created as single monolithic...
Published: 4/3/2023   |   Inventor(s): Nasser Peyghambarian, Axel Schülzgen, Li Li, Jacques Albert
Keywords(s):  
Category(s): Technology Classifications > Imaging & Optics, Technology Classifications > Imaging & Optics > Lasers & Other Sources
All-Fiber Multicore Fiber Laser Devices
Researchers at the University of Arizona have developed a compact, power-scalable, alignment-free fiber laser that takes a new approach to stabilizing phase-locked operation of multi-core fiber lasers by completely removing all free space optical components. This high-brightness, all-fiber laser package uses passive optical fiber spliced at both ends...
Published: 4/3/2023   |   Inventor(s): Nasser Peyghambarian, Axel Schülzgen, Li Li
Keywords(s):  
Category(s): Technology Classifications > Imaging & Optics, Technology Classifications > Imaging & Optics > Fiber Optics, Technology Classifications > Imaging & Optics > Lasers & Other Sources