Electro-thermal actuator system

Details Electro-thermal actuator system Electro-thermal actuator system

1994-12-12

1997-09-16

Lazarus, Ira S.

Power plants

Motor operated by expansion and/or contraction of a unit of...

Mass is a liquid

60528, 60531, F03C 500

Patent

active

056668104

ABSTRACT:
An electro-thermal actuator has linear displacement of its actuator rod accurately controlled and monitored. The actuator includes a sealed chamber containing an expansible and contractible working fluid. The working fluid is heated by way of pulse width modulated current applied to a heater in thermal contact with the fluid. As heat is applied to the working fluid, it undergoes a phase change to a gas. The resulting gas increases the pressure within the chamber, thereby exerting force on a piston and linearly displacing an actuator rod attached to the piston against the bias of a spring. The actuator includes a temperature sensor mounted within the chamber and in thermal contact with the working fluid to thereby monitor the temperature of the working fluid. The working fluid temperature is provided as an input to a feedback circuit which controls the width of the current pulses applied to the heater used to heat the working fluid. In this way, the temperature of the working fluid may be monitored and controlled, thereby allowing accurate control over the linear displacement of the moveable piston rod portion of the actuator.

REFERENCES:
patent: 3131273 (1964-04-01), Blodgett
patent: 3902150 (1975-08-01), Wada et al.
patent: 4002882 (1977-01-01), McCutchen
patent: 4029941 (1977-06-01), Huebscher et al.
patent: 4081963 (1978-04-01), Stove
patent: 4104507 (1978-08-01), Tisone et al.
patent: 4318529 (1982-03-01), Huelle et al.
patent: 4611562 (1986-09-01), Nakano et al.
patent: 4759189 (1988-07-01), Stropkay et al.
patent: 4796207 (1989-01-01), Andre et al.
patent: 4887429 (1989-12-01), Birli, Sr. et al.
patent: 5057667 (1991-10-01), Bell et al.
patent: 5309077 (1994-05-01), Choi

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