Xavier Collazo-Fernandez is an Electrical Engineer for NASA John H. Glenn Research Center at Lewis Field. He holds a Bachelor of Science in Electrical Engineering, from Universidad ANA G. Mendez in Puerto Rico. His current interests include operation, protection, and control of aerospace power systems and microgrids, real time modeling and Power Hardware in the loop.
With their unique ability to take off and land from any spot, as well as hover in place, vertical lift vehicles are increasingly being contemplated for use in new ways that go far beyond those considered when thinking of traditional helicopters. NASA’s Revolutionary Vertical Lift Technology (RVLT) project is working with partners to develop critical technologies that enable revolutionary new air travel options. High voltage direct current Inverters feeding Permanent Magnet Machines are the primary propulsion loads that will be found on these electrified vertical takeoff and landing (eVTOL) aircrafts. As little to no public information has been made available through on the test and evaluation of these loads, especially under variations in input power quality this proposes a challenge. This presentation will provide an evaluation of an HVDC Inverter/PM Machine load with respect to Power Quality testing as defined by the AS7499 Aircraft HVDC Power Quality working draft. The load will be tested for normal and abnormal (faulted) power quality conditions, included variations in steady-state performance, input impedance, line-step transient voltage, ripple voltage (peak, RMS, spectrum), over-voltage and under-voltage surge, and more. Test method recommendations will also be highlighted base on results obtained from the Advanced Reconfigurable Electrified Aircraft Laboratory.
This presentation will provide an evaluation of an HVDC Inverter/PM Machine load with respect to Power Quality testing as defined by the AS7499 Aircraft HVDC Power Quality working draft. Test method recommendations will also be highlighted base on results obtained from the AREAL testbed.
