Solenoid driven metering pump supply voltage compensation circuit
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United States of America Patent
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-
Dec 30, 1986
Grant Date -
N/A
app pub date -
Dec 9, 1985
filing date -
Dec 9, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Circuitry is provided for use with solenoid driven apparatus, such as a metering pump, for example, which is typically powered by direct current from a full wave rectifier. The circuit compensates for variations in the supply voltage by adjusting solenoid 'on-time' in substantially inverse relationship to the supply voltage by powering an RC charging network of an integrated circuit directly from the secondary of a transformer supplying power to the solenoid.
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