Title :
Advanced power converters for More Electric Aircraft applications
Author :
Homeyer, W.G. ; Bowles, E.E. ; Lupan, S.P. ; Rodriguez, C. ; Walia, P.S. ; Shah, N.M. ; Maldonado, M.A.
Author_Institution :
Gen. Atomics, San Diego, CA, USA
Abstract :
A DC-DC converter and a DC-AC inverter are under development for More Electric Aircraft (MEA) use. They are both highly compact and are designed to operate from 270 Vdc input power and produce output power that meets requirements for fighter aircraft, including compliance with MIL-STD-704E and MIL-STD-461D guidelines. Both units are designed to be cooled with Poly Alpha Olefin (PAO) at 30°C maximum inlet temperature and to operate for at least 30 s after a loss of coolant flow before shutting down. Both units are designed to withstand 20 Gs shock loadings and random vibration loadings up to 0.04 Grms 2/Hz for the DC-DC converter and 0.36 Grms2 /Hz for the DC-AC inverter. The reliability goal is 25000 hour mean time between failures (MTBF). Both units incorporate under/over voltage, short circuit, and over temperature protection. The DC-AC inverter also has over/under frequency, DC content, waveform distortion, and zero voltage content protection. The DC-DC converter provides 5.6 kW at 29±0.5 Vdc with an efficiency of 90%. It weighs 8.9 lb and is 5" long by 5" wide by 5.5" high (138 in3). The DC-AC inverter provides 8 kVA of three phase power at (115±1.5)/200 Vac and 400 Hz with an efficiency of 87%. It weighs 18.2 lbs and is 11.5" long by 5" wide by 5.5" high (316 in3). The paper describes the design of both units and the resulting performance. The results of tests on both units are summarized
Keywords :
DC-DC power convertors; PWM invertors; military aircraft; overvoltage protection; protection; resonant power convertors; switching circuits; 11.5 in; 115 V; 120 kHz; 18.2 lb; 200 V; 270 V; 29 V; 30 C; 400 Hz; 5 in; 5.5 in; 5.6 kW; 8.9 lb; 87 percent; 90 percent; DC voltage output capacitor; DC-AC PWM inverter; DC-DC converter; FET; IGBT; More Electric Aircraft; Poly Alpha Olefin coolant; ZCS; ferrite core; fighter aircraft; high frequency series resonant input inverter; mean time between failures; multi-step approach; output sine wave; over temperature protection; overvoltage protection; planar transformer; pulse width modulation; random vibration loadings; rectifier; reliability; resonant current energy; shock loadings; short circuit protection; thin planar copper windings; undervoltage protection; waveform distortion protection; Coolants; DC-DC power converters; Electric shock; Guidelines; Inverters; Military aircraft; Power generation; Protection; Temperature; Voltage control;
Conference_Titel :
Energy Conversion Engineering Conference, 1996. IECEC 96., Proceedings of the 31st Intersociety
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-3547-3
DOI :
10.1109/IECEC.1996.552860
