Automatic frequency controlled motor backdrive
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United States of America Patent
Stats
-
Apr 4, 1995
Grant Date -
N/A
app pub date -
Jun 4, 1993
filing date -
Jun 4, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a horizontal centrifuge, a bowl rotates in the same direction as a screw internally of the bowl. The bowl and screw connect to a three input gear box which rotates the bowl and screw at a small differential, or the scrolling rate. A separate motor running at a variable rate connects to the third gear box input and thereby reduces the scrolling rate. A feedback loop connects to the motor to vary the motor speed so that the scrolling rate is varied. A maindrive motor rotates the bowl which then couples through the gear box to rotate the screw and thereby furnish the power to rotate the bowl and screw.
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