NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Variable-Speed Induction Motor Drives for Aircraft Environmental Control CompressorsNew, more-efficient designs for aircraft jet engines are not capable of supplying the large quantities of bleed air necessary to provide pressurization and air conditioning for the environmental control systems (ECS) of the next generation of large passenger aircraft. System analysis and engineering have determined that electrically-driven ECS can help to maintain the improved fuel efficiencies; and electronic controllers and induction motors are now being developed in a NASA/NPD SBIR Program to drive both types of ECS compressors. Previous variable-speed induction motor/controller system developments and publications have primarily focused on field-oriented control, with large transient reserve power, for maximum acceleration and optimum response in actuator and robotics systems. The application area addressed herein is characterized by slowly-changing inputs and outputs, small reserve power capability for acceleration, and optimization for maximum efficiency. This paper therefore focuses on the differences between this case and the optimum response case, and shows the development of this new motor/controller approach. It starts with the creation of a new set of controller requirements. In response to those requirements, new control algorithms are being developed and implemented in an embedded computer, which is integrated into the motor controller closed loop. Buffered logic outputs are used to drive the power switches in a resonant-technology, power processor/motor-controller, at switching/resonant frequencies high enough to support efficient high-frequency induction motor operation at speeds up to 50,000-RPA
Document ID
19960038250
Document Type
Conference Paper
Authors
Mildice, J. W. (Motive Power Development San Diego, CA United States)
Hansen, I. G. (Motive Power Development San Diego, CA United States)
Schreiner, K. E. (Motive Power Development San Diego, CA United States)
Roth, M. E. (NASA Cleveland, OH United States)
Date Acquired
September 6, 2013
Publication Date
July 1, 1996
Subject Category
Electronics and Electrical Engineering
Report/Patent Number
NAS 1.15:107261
NASA-TM-107261
E-10325
Meeting Information
Intersociety Energy Conversion Engineering Conference(Washington, DC)
Funding Number(s)
CONTRACT_GRANT: NAS3-27549
PROJECT: RTOP 244-02-02
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Available Downloads

NameType 19960038250.pdf STI