Compressor load control for an auxiliary power unit

Details Compressor load control for an auxiliary power unit Compressor load control for an auxiliary power unit

1981-03-09

1983-01-25

Truhe, J. V.

Prime-mover dynamo plants

Electric control

Engine control

290 40R, H02P 904

Patent

active

043705600

ABSTRACT:
An auxiliary power unit for an aircraft drives an electrical generator and an air compressor. The auxiliary power unit is primarily intended for operation with the aircraft on the ground when other aircraft power systems are shut down. The auxiliary power unit may, however, be used in an emergency to supplement the main aircraft generating system, with the aircraft airborne. When the auxiliary power unit generator is used in conjunction with the aircraft generating system, inlet air to the compressor is controlled to vary the compressor load on the power unit to minimize power unit speed changes and electrical frequency transients.

REFERENCES:
patent: 3104524 (1963-09-01), Flanders
patent: 3625003 (1971-12-01), Liddle
patent: 3678285 (1972-07-01), Griffith
patent: 3686860 (1972-08-01), White
patent: 3764814 (1973-10-01), Griffith

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