Pumps – Condition responsive control of pump drive motor – By control of electric or magnetic drive motor
Patent
1990-12-07
1992-08-25
Bertsch, Richard A.
Pumps
Condition responsive control of pump drive motor
By control of electric or magnetic drive motor
119 1444, 119 1425, F04B 4906
Patent
active
051414031
ABSTRACT:
A low-energy-consuming apparatus and method for controlling vacuum levels in machine milking and other vacuum systems subject to air leakage utilizes in combination a high vacuum reserve, a low-vacuum end (pipelines), a dual vacuum controller positioned between the high-vacuum reserve and the low-vacuum end and an adjustable speed drive (ASD) motor on a vacuum pump to regulate the delivered air to match the air usage in the low-vacuum end. The dual vacuum controller senses vacuum disturbances in the low-vacuum end and adjusts the flow rate of air from the low-vacuum end to the high-vacuum reserve rather than using external air makeup, thus providing a controlled vacuum with minimum pressure variance and energy input. Energy savings and demand reduction of about 50 percent (50%) during milking are realized under the new system.
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Aneshansley Daniel J.
Guo Fangjiang
Ludington David C.
Pellerin Roger A.
Bertsch Richard A.
Cornell Research Foundation Inc.
Scheuermann David W.
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