Hysteresis synchronous motor rate servo system

Details Hysteresis synchronous motor rate servo system Hysteresis synchronous motor rate servo system

1976-09-30

1979-03-06

Smith, Jr., David

Electricity: motive power systems

Positional servo systems

With stabilizing features

318702, 318448, G05B 501

Patent

active

041433114

ABSTRACT:
A servo control system for maintaining a direct current motor in operation at a constant speed is provided with two velocity feedback control loops. One feedback control loop is a rate damping loop which responds quickly to minor variations in motor speed to hold the motor at a predetermined command speed. The other loop is a steady state error loop through which a command speed is fed and which responds much more slowly to variations in command speed. The utilization of dual velocity control loops allows the servo system to adjust motor speed quickly in response to deviations in actual motor speed from commanded speed, yet is sensitive to low frequency variations in velocity feedback such as result from disturbances in motor loading.

REFERENCES:
patent: 3559018 (1971-01-01), Fournier
patent: 3600508 (1971-08-01), Dann et al.
patent: 3600657 (1971-08-01), Pfaff
patent: 3668492 (1972-06-01), Konishi et al.
patent: 3829747 (1974-08-01), Woolfson et al.
patent: 3887853 (1975-06-01), Klein et al.

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