Motor control device and motor control method
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorMasatoshi Matsuda
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Abstract
According to one embodiment, a motor control device controls a brushless motor including a rotor with a magnet, and a stator including multi-phase wound coils. In the motor control device, a rotational-direction detector detects a rotational direction of the brushless motor, in accordance with a hall signal detected by a hall-signal detector and a phase current detected by a phase-current detector at timing when at least one transistor is set in an energizable state.
Claims10
A motor control device that controls a brushless motor including a rotor with a magnet, and a stator including multi-phase wound coils, the device comprising:
- a power device that includes a plurality of transistors, and supplies power to the brushless motor;
- a hall-signal detector that detects a hall signal from one hall element of the brushless motor;
- a power-device controller that sets at least one of the transistors in an energizable state for a certain period at certain timing during rotation of the brushless motor;
- a phase-current detector that detects a phase current flowing through the at least one transistor in the energizable state;
- and
- a rotational-direction detector that detects a rotational direction of the brushless motor, in accordance with the hall signal and the detected phase current at timing in the energizable state of the at least one transistor.
A motor control method to be performed by a motor control device that controls a brushless motor including a rotor with a magnet, and a stator including multi-phase wound coils, the motor control device comprising:
- a power device that includes a plurality of transistors, and supplies power to the brushless motor;
- a hall-signal detector that detects a hall signal from one hall element of the brushless motor;
- and a power-device controller that sets at least one of the transistors in an energizable state for a certain period at certain timing during rotation of the brushless motor, the method comprising:
- detecting a phase current flowing through the at least one transistor in the energizable state;
- and
- detecting a rotational direction of the brushless motor, in accordance with the hall signal and the detected phase current at timing in the energizable state of the at least one transistor.
Dependencies are inferred from the claim text.