Valve position sensing circuit

Details Valve position sensing circuit Valve position sensing circuit

1990-10-10

1992-05-05

Ostrager, Allen M.

Power plants

Motive fluid energized by externally applied heat

Having condition responsive control

60646, 25112904, F01K 1302

Patent

active

051096757

ABSTRACT:
The present invention provides a method and corresponding apparatus for detecting open and short circuit faults in a valve position sensor. According to one aspect of the invention, a fuel or steam valve (2) in a turbine system is automatically opened and closed by a positioner/sensor combination (1, 36, 32). In the event a fault occurs in the position sensing circuitry, a fault signal is immediately produced which allows appropriate action to be taken, e.g., closing the valve, before the turbine is damaged.

REFERENCES:
patent: 4554788 (1985-11-01), Hwang et al.
patent: 4658590 (1987-04-01), Higashi et al.
patent: 4878348 (1989-11-01), Fridsma
patent: 4976108 (1990-12-01), Binstock et al.

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