Animal husbandry – Milkers – With automatic control
Patent
1997-04-17
1999-10-05
Price, Thomas
Animal husbandry
Milkers
With automatic control
A01J 5011
Patent
active
059607360
ABSTRACT:
A vacuum control for milking systems includes a vacuum pump driven by an electric motor which is activated by a variable frequency drive (VFD). The VFD is controlled during a milking phase by plc programmable controller and a proportional/integral (PI) controller which respond to a vacuum feedback sensor connected to the milking system. The plc controller differentiates between milk and wash phases and also provides a fixed preset speed control for a washing phase for the milking system. The integrator interfaces between a milk/wash controller and the plc.
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Guo Fangjiang
Kowalksi James A.
Ludington David C.
Pellerin Roger A.
Cornell Research Foundation Inc.
Price Thomas
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