Motor driving apparatus, motor driving method and disk driving apparatus

A motor driving apparatus includes a neutral point difference voltage detecting unit operable to detect a difference voltage between a virtual neutral point of a resistor circuit connected in parallel to motor coils and an actual neutral point which is a common connection point of the motor coils, a...

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Bibliographische Detailangaben
Hauptverfasser: Fukamizu, Shingo, Yamamoto, Yasunori, Kuroshima, Shinichi
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A motor driving apparatus includes a neutral point difference voltage detecting unit operable to detect a difference voltage between a virtual neutral point of a resistor circuit connected in parallel to motor coils and an actual neutral point which is a common connection point of the motor coils, a rotor position detecting unit operable to detect a position of the rotor based on the difference voltage, and a controller operable to control commutation of an inverter. A rotation start torque applying process applies a rotation start pulse for providing rotation torque to the rotor based on a determined rotor position.