Dosing pump and method for enhancing dosing precision
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United States of America Patent
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-
Sep 19, 2000
Grant Date -
N/A
app pub date -
Jun 23, 1999
filing date -
Dec 23, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to a method for enhancing the dosing precision of a dosing pump which is driven by an asynchronous motor via an eccentric gear. The supply of the motor is cut off approximately half a cycle time before a desired dosing pause period or stoppage. The motor freewheels afterwards for part of the cycle time, before a direct voltage is applied to it for approximately a quarter cycle time, such that an eddy current is induced in the rotor, which produces an antipolarized magnetic field which brakes the rotor.
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