Methods and apparatus for monitoring average current and input power in an electronically commutated motor

A method for monitoring input power to an electronically commutated motor (ECM) is described. The method includes determining, with a processing device, an average input current to the motor, the average input current based on a voltage drop across a shunt resistor in series with the motor, measurin...

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Bibliographische Detailangaben
Hauptverfasser: MARK A. BRATTOLI, GUY BONNER JR
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:A method for monitoring input power to an electronically commutated motor (ECM) is described. The method includes determining, with a processing device, an average input current to the motor, the average input current based on a voltage drop across a shunt resistor in series with the motor, measuring an average input voltage applied to the motor utilizing the processing device, multiplying the average input current by the average voltage to determine an approximate input power, and communicating the average input power to an external interface.