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Class Information
Number: 318/622
Name: Electricity: motive power systems > Positional servo systems (e.g., servomechanisms) > With stabilizing features (e.g., anti-hunting, damping) > Lead or lag networks > A.c. networks
Description: Subject matter in which the lead and lag circuit is adapted for use in an AC servo loop.

Patents under this class:

Patent Number Title Of Patent Date Issued
7911172 Machine position control device Mar. 22, 2011
5500580 Integrated compliance servovalve Mar. 19, 1996
4555757 Interface system for hybrid control loops Nov. 26, 1985
4387624 Device for increasing the tracking accuracy of an aiming system Jun. 14, 1983
4325013 Electrical tracer control system utilizing sine wave resolution Apr. 13, 1982
4298833 Apparatus for damping operator induced oscillations of a controlled system Nov. 3, 1981
4283665 Method and apparatus for eliminating ripple component from motor control loop Aug. 11, 1981
4221995 Linear motor drive system for continuous-path closed-loop position control of an object Sep. 9, 1980
4184109 Position servo loop for robot or automatic machine Jan. 15, 1980
4128795 Device for damping the critical frequencies of a rotor suspended by a radial electromagnetic bearing Dec. 5, 1978

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