Vacuum level control system using variable frequency drive

Vacuum level control system using variable frequency drive

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 s...

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Hauptverfasser: FANGJIANG GUO, JAMES A. KOWALSKI, DAVID C. LUDINGTON, ROGER A. PELLERIN
Format: Patent
Sprache:eng
Schlagworte:
AGRICULTURE
ANIMAL HUSBANDRY
FISHING
FORESTRY
HUMAN NECESSITIES
HUNTING
MANUFACTURE OF DAIRY PRODUCTS
TRAPPING
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creator FANGJIANG GUO
JAMES A. KOWALSKI
DAVID C. LUDINGTON
ROGER A. PELLERIN
description 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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subjects AGRICULTURE
ANIMAL HUSBANDRY
FISHING
FORESTRY
HUMAN NECESSITIES
HUNTING
MANUFACTURE OF DAIRY PRODUCTS
TRAPPING
title Vacuum level control system using variable frequency drive
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