Motor control device and motor control method
AssigneeFanuc Corporation
InventorsTomohisa Tsutsumi, Yuuki Morita
Life of this patent
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Abstract
A motor control device includes: a polarity sensor configured to detect whether a magnetic pole position in a synchronous motor resides on a positive polarity side or a negative polarity side with reference to a reference position; a motor control unit configured to turn the synchronous motor from the polarity side detected by the polarity sensor toward an opposite polarity side through the reference position; and a magnetic pole position determination unit configured to determine, as the magnetic pole position, a position of the synchronous motor at the moment when the polarity changes, based on a detection result of the polarity sensor.
Claims6
A motor control device comprising:
- a polarity sensor configured to detect whether a magnetic pole position in a synchronous motor resides on a positive polarity side or a negative polarity side with reference to a reference position;
- a motor control unit configured to turn the synchronous motor from the polarity side detected by the polarity sensor toward an opposite polarity side through the reference position;
- and
- a magnetic pole position determination unit configured to determine, as the magnetic pole position, a position of the synchronous motor at a moment when a polarity changes, based on a detection result of the polarity sensor.
A motor control method comprising:
- a first step of detecting whether a magnetic pole position in a synchronous motor resides on a positive polarity side or a negative polarity side with reference to a reference position;
- a second step of turning the synchronous motor from the polarity side detected at the first step toward an opposite polarity side through the reference position;
- and
- a third step of determining, as the magnetic pole position, a position of the synchronous motor at a moment when a polarity changes.
Dependencies are inferred from the claim text.