Circuit for determining the response current of magnetic valves

Details Circuit for determining the response current of magnetic valves Circuit for determining the response current of magnetic valves

1977-08-23

1979-07-24

Rosenthal, Arnold

Fluid handling

With indicator, register, recorder, alarm or inspection means

Fluid pressure responsive indicator, recorder or alarm

324 28R, 324 59, 123 32EF, 251129, F16K 3106, G01R 3300

Patent

active

041619625

ABSTRACT:
A circuit for determining the minimum operating current of magnetic valves, wherein a current source which delivers an impressed current rising in ramp fashion supplies the field coil of the magnetic valve, with a differentiator for the voltage at the field coil connected parallel to the field coil, the output of the differentiator being fed to a control input of an electronic switching unit, the output of the switching unit in control connection with a program generator for the current source in such a manner that a sudden rise of the output voltage of the differentiating member stops the program generator and the program value, which was reached when the current rise was stopped and determines the minimum operating current, is stored in a memory connected to the program generator.

REFERENCES:
patent: 2962609 (1960-11-01), MacDonald
patent: 3548301 (1970-12-01), Zutkis

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