METHOD AND HARDWARE SYSTEM FOR DRIVING STEPPER MOTOR IN FEED-FORWARD VOLTAGE MODE

PROBLEM TO BE SOLVED: To suppress a phase current generated in winding of a stator over a full speed range of motor when driving a stepper motor in a voltage mode. SOLUTION: A method of driving a stepper motor in feed-forward voltage mode includes (A) a step of setting the amplitude of a sinusoidal...

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Bibliographische Detailangaben
Hauptverfasser:	MARANO VINCENZO, BAGARELLI FULVIO GIACOMO, POLI ENRICO
Format:	Patent
Sprache:	eng
Schlagworte:	CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To suppress a phase current generated in winding of a stator over a full speed range of motor when driving a stepper motor in a voltage mode. SOLUTION: A method of driving a stepper motor in feed-forward voltage mode includes (A) a step of setting the amplitude of a sinusoidal phase voltage of the stepper motor to a predetermined value to rotate the stepper motor at a desired speed. The predetermined value is the sum of a back-electromotive force (BEMF) estimated via a function of the desired speed and a product of a desired amplitude of a phase current (Iphase) and an estimated absolute value of the impedance of the stepper motor. COPYRIGHT: (C)2011,JPO&INPIT