Lucas Industries Limited

James Patrick Doyle

Jeffrey Ronald Coles

Christopher John Yarrow

Marc Holme

Ronald Johnson

An aero-engine is provided with an integrated switched reluctance generator permanently connected to the low speed spool of the engine such that &ldquo;windmilling&rdquo; of the engine enables the generator to be turned if the engine suffers a flame out. The generator is driven by a step up gearbox so as to provide reasonable electrical output, say 25 kW, during flameout whilst keeping the generator weight down.

Electrical generator an aero-engine including such a generator, and an aircraft including such a generator

A constant frequency a.c. generating system includes an alternator driven at a variable speed. A rectifier provides a d.c. supply for a rotary inverter. To maintain the voltage and frequency of the inverter output constant, the frequency is monitored and used to control the alternator field current and the voltage is monitored and used to control the inverter field current in a regulator circuit.

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Hemel Hempstead, United Kingdom

James Patrick Doyle