Piezoelectric torque motor

Details Piezoelectric torque motor Piezoelectric torque motor

1988-06-08

1989-05-02

Cohan, Alan

Fluid handling

Pressure modulating relays or followers

25112906, 25112908, G05D 1600

Patent

active

048258946

ABSTRACT:
A piezoelectric torque motor (10) includes a body (11), a pair of opposed nozzle assemblies (12,13) mounted on the body, a pair of piezoelectric actuators (14,15) extending upwardly away from the body, and a lever assembly (16) having an upper portion (95) engaging the upper ends of the actuators and having depending leg portions (96,98). A foot plate (94) is mounted on the lower marginal end portions of the lever legs, and is positioned between the nozzles. The piezoelectric actuators are supplied with differential voltages to cause swinging movement of the lever assembly between the nozzles. The improved torque motor may be used in the first- or pilot-stage of a two-stage electrohydraulic servovalve.

REFERENCES:
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Technical Bulletin 103, "Transfer Function for Moog Servovalves", Moog Inc. (1965).
Blockburn et al., "Fluid Power Control", The M.I.T. Press, (4th Printing 1972, [p.323]).
Pysics International Co., Publication (Date Unknown).

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