Floating coil servo valve

Details Floating coil servo valve Floating coil servo valve

1989-11-06

1991-05-07

Michalsky, Gerald A.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Electrical input and feedback signal means

91433, 91459, 13762565, 25112901, F15B 903, F15B 13044

Patent

active

050127225

ABSTRACT:
An electrohydraulic servo valve employing a linear force motor having a floating coil and armature driven by a high frequency excitation signal modulated to change its average DC component. A servo loop controller modulates the excitation signal in response to feedback signals from the servo valve or a hydraulic actuator controlled by the servo valve.

REFERENCES:
patent: 2750961 (1956-06-01), Uritis
patent: 3840045 (1974-10-01), Grosseau
patent: 4040445 (1977-08-01), McCormick
patent: 4464978 (1984-08-01), Ichiryu et al.
patent: 4544129 (1985-10-01), Ichiryu et al.
patent: 4628499 (1986-12-01), Hammett
patent: 4714005 (1987-12-01), Leemhuis
patent: 4741247 (1988-05-01), Glomeau et al.
patent: 4817498 (1989-04-01), Takagi

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