Speed control unit for an aircraft generator
AssigneeLucas Industries public limited company
InventorSidney B. Smith
Life of this patent
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Abstract
A speed control unit for an aircraft generator includes a continuously variable gear ratio drive device through which the generator is driven by a shaft of the engine and which is responsive to an error signal indicative of a difference between desired and sensed generator speeds. A control circuit prevents the error signal from being applied to the drive device until a predetermined speed of the generator is reached and a ramp generating circuit increases the rise time of the error signal after the generator has reached the predetermined speed.
Claims5
A speed control unit for an aircraft generator, comprising a continuously variable ratio drive device, means for sensing the speed of an output shaft of said drive device, and a control circuit for generating an error signal responsive to a difference between a sensed speed and a desired speed of said output shaft, said drive device being responsive to said error signal for varying the ratio of the input and output speeds of said drive device to maintain said output speed substantially constant, said control circuit including means for delaying application of said error signal to said drive device until said output shaft has reached a predetermined speed, and a circuit for increasing the rise time of said error signal after said predetermined speed has been reached.
Dependencies are inferred from the claim text.