Control of chokes

Details Control of chokes Control of chokes

1975-04-25

1977-02-08

Hohauser, Herman

Electrical transmission or interconnection systems

Miscellaneous systems

340239R, G08B 2100

Patent

active

040073807

ABSTRACT:
A well choke control apparatus comprising means for producing a first electrical signal indicative of a required position of the choke and means for deriving a second electrical signal indicative of the actual position of the choke. A comparator is arranged to be fed with the first and second electrical signals and to control actuation of the choke in the required direction to equalize said electrical signals. A number of override control arrangements may be provided to ensure that the choke is not opened or closed beyond predetermined safe limits and the main control comparator is self checking.

REFERENCES:
patent: 3594557 (1971-07-01), Anderson
patent: 3821726 (1974-06-01), Chang et al.

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