Browsing by Author "McGee, Rodney"
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Item Design, fabrication, iteration, and testing of the 68x68 superlattice LED infrared projection system and associated electronics(University of Delaware, 2010) McGee, RodneyOptoelectronic devices that emit in the mid-wave infrared (MWIR) and long-wave infrared (LWIR) wavelengths have traditionally targeted the 3-4 and 8-12 micrometer wavelength, because atmospheric absorption is minimal in the these windows. Infrared (IR) radiation has long been of scientific interest because the unique signatures of light emitted or absorbed can be remotely detected and characterized for all manner of objects and processes. Large IR detector arrays, particularly ones intended for military and/or aerospace applications, are often difficult and expensive to directly test. Ultimately for these detectors, an IR projector for scene simulation is required. This thesis documents the creation and testing of a cryogenic integrated infrared projection system combining large two-dimensional arrays of superlattice light-emitting diodes (SLEDs) with a custom driver IC and FPGA-based control system. It covers a range of disciplines, design decisions, systems engineering issues, and personal observations on the process of the design, fabrication, iteration, and testing of the 68x68 SLEDs system. Several testing sessions showed the unique functionality and capabilities in several important areas such as: apparent temperature exceeding 1000 Kelvin, rise and fall time of a few microseconds, and over 90 percent functional yield. The work described in this paper provides the foundation for the 512x512 SLEDs system currently in development.Item RIVER: Roaming Inverter Vehicle Energy Resource(University of Delaware, 2020) McGee, RodneyElectric Vehicles designed with bi-directional AC chargers allow the possibility of a flow of energy between an electric grid and the traction battery. Any device must go through a procedural interconnection process to be grid integrated. ☐ The interconnection of so-called "behind the meter" inverters, or distributed energy resources, has dramatically increased since the introduction of IEEE standard1547 in 2003. After that, devices like photovoltaic systems could be designed and tested to meet a single national set of base requirements. Fundamental to the installation and operation of these grid-tied systems is the assumption that they are fixed in place. ☐ The interconnection of inverters on electric vehicles faces several major challenges. There are significantly different regulatory regimes, standards, and best practices in place for automobiles versus electrical installations. The configuration of an inverter is a location specific process, which is antithetical to the inter-state nature of a vehicle. This dissertation proposes a framework to solve the issues of interconnection of mobile distributed energy resources.