Systems and methods for detecting appliance pump cavitation or dry state

Systems and methods for detecting appliance pump cavitation or dry state

Systems and methods for detecting appliance pump cavitation or dry state are provided. An exemplary appliance can include a current measurement circuit configured to provide a feedback signal that describes an inverter current drawn by an inverter providing three-phase power to the pump motor. A con...

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Hauptverfasser: Kollipara Meher Prasadu, Fryman Mark Thomas
Format: Patent
Sprache:eng
Schlagworte:
COFFEE MILLS
DOMESTIC ARTICLES OR APPLIANCES
DOMESTIC WASHING OR CLEANING
FURNITURE
HUMAN NECESSITIES
SPICE MILLS
SUCTION CLEANERS IN GENERAL
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creator Kollipara Meher Prasadu
Fryman Mark Thomas
description Systems and methods for detecting appliance pump cavitation or dry state are provided. An exemplary appliance can include a current measurement circuit configured to provide a feedback signal that describes an inverter current drawn by an inverter providing three-phase power to the pump motor. A control unit of an appliance can detect pump cavitation and dry state by monitoring the feedback signal. Another exemplary appliance can include a motor speed detection circuit configured to provide a motor speed signal describing the speed of the pump motor. The control unit of the appliance can monitor variance in pump motor speed to detect pump dry state or cavitation. An exemplary method includes monitoring either an inverter current used by an inverter to drive a motor or a variance in a rotational speed of the motor.
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An exemplary appliance can include a current measurement circuit configured to provide a feedback signal that describes an inverter current drawn by an inverter providing three-phase power to the pump motor. A control unit of an appliance can detect pump cavitation and dry state by monitoring the feedback signal. Another exemplary appliance can include a motor speed detection circuit configured to provide a motor speed signal describing the speed of the pump motor. The control unit of the appliance can monitor variance in pump motor speed to detect pump dry state or cavitation. An exemplary method includes monitoring either an inverter current used by an inverter to drive a motor or a variance in a rotational speed of the motor.</abstract><oa>free_for_read</oa></addata></record>
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subjects COFFEE MILLS
DOMESTIC ARTICLES OR APPLIANCES
DOMESTIC WASHING OR CLEANING
FURNITURE
HUMAN NECESSITIES
SPICE MILLS
SUCTION CLEANERS IN GENERAL
title Systems and methods for detecting appliance pump cavitation or dry state
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