Prime mover speed control system

Rotary kinetic fluid motors or pumps – With control means responsive to motion developed fluid...

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Details

290 40A, 318608, 415 30, F01B 2506

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active

039867889

ABSTRACT:
A speed control system for a fluid driven prime mover, for example, a turbine wherein the speed of the prime mover is controlled by the positioning of at least one fluid inlet valve. The inlet valve is positioned by a valve operator responsive to an output voltage from the speed control system. The output voltage is directly proportional to the phase difference (error) between a variable reference digital pulse train input representing a desired speed and a feedback digital pulse train input representing the actual prime mover speed. During steady-state operation, prime mover load changes will first cause a phase difference between the reference input and the feedback input whereupon a corrective output voltage is immediately applied to the inlet valve operator prior to the occurrence of an actual speed error. Similarly, desired speed changes are set in the variable reference input resulting in immediate and precise valve operator response since the accompanying change in phase between the new reference input and the last feedback input results in an immediate corrective output voltage.

REFERENCES:
patent: 3462663 (1969-08-01), Schiller
patent: 3753067 (1973-08-01), Milligan
patent: 3798907 (1974-03-01), Barrett et al.

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