Frequency alignment acceleration control for a motor

Method and apparatus for accelerating a multi-phase motor having a rotatable rotor are disclosed. The method incorporates use of a motor control circuit to predict a subsequent loss of frequency lock between the motor control circuit and a motor while the motor control circuit and the motor remain f...

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Bibliographische Detailangaben
Hauptverfasser: STREET DAVID R, HEYDT JEFFREY A
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:Method and apparatus for accelerating a multi-phase motor having a rotatable rotor are disclosed. The method incorporates use of a motor control circuit to predict a subsequent loss of frequency lock between the motor control circuit and a motor while the motor control circuit and the motor remain frequency locked, and based on the prediction, steps to overt a loss of frequency lock during acceleration. The apparatus includes at least a motor control circuit detecting frequency lock with a motor when a motor signal falls within a timing window, and while frequency locked, predicting a subsequent loss of frequency lock based on a relative position of the motor signal within the timing window.