Pump and motor assembly with constant pressure output
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United States of America Patent
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-
Dec 17, 2002
Grant Date -
Oct 3, 2002
app pub date -
Mar 29, 2001
filing date -
Mar 29, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Disclosure is made of a method for electronic polar attenuation of torque profile for positive displacement pumps by a processor where the attenuated torque profile is compared with the shaft displacement angle of the pump input shaft. The processor then signals a motor to power a pump with the result of pumping at a constant pressure at the full range of the designed system flow volume. In addition to the attenuated torque profile, the processor can also account for the response time of the pump drive, the motor inductive reactance, system inertia, application characteristics of the pump, and regenerative energy during deceleration of the pump.
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