Motor control device
AssigneeAdvics Co., Ltd.
InventorsTomoya Takahashi, Hikaru Kawamura
Life of this patent
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Abstract
A motor control device includes: a rotation control unit that rotates a rotor of a brushless motor by supplying a power thereto; a rotation direction determining unit that determines a rotation direction of the rotor accompanying the power supplied to the brushless motor by the rotation control unit; and a magnetic pole distinguishing unit that distinguishes magnetic poles of the rotor based on an orientation of a current flowing through each of coils due to the power supplied to the brushless motor by the rotation control unit and the rotation direction of the rotor determined by the rotation direction determining unit.
Claims18
A motor control device, comprising:
- a rotation control unit configured to rotate a rotor of a brushless motor by supplying power;
- a rotation direction determining unit configured to determine a rotation direction of the rotor accompanying the power supplied to the brushless motor by the rotation control unit;
- a magnetic pole distinguishing unit configured to distinguish magnetic poles of the rotor at the start of driving the brushless motor by using an orientation of a current flowing through a coil of the brushless motor due to the power supplied to the brushless motor by the rotation control unit and the rotation direction of the rotor determined by the rotation direction determining unit;
- and
- a rotation coordinate setting unit configured to execute pre-correction processing of correcting a direction of an estimated d-axis such that the direction of the estimated d-axis approaches a direction of an actual d-axis before the rotation control unit rotates the rotor, the actual d-axis being a real d-axis of rotation coordinates of vector control, the estimated d-axis being an axis estimated to be a d-axis is in the rotation coordinates,
- wherein the pre-correction processing using the rotation coordinate setting unit and the process of rotating the rotor using the rotation control unit are performed continuously, and the magnetic-pole-position is estimated using both processes.
A motor control device, comprising:
- a rotation control unit configured to rotate a rotor of a brushless motor by supplying power;
- a rotation direction determining unit configured to determine a rotation direction of the rotor accompanying the power supplied to the brushless motor by the rotation control unit;
- a magnetic pole distinguishing unit configured to distinguish magnetic poles of the rotor at the start of driving the brushless motor by using an orientation of a current flowing through a coil of the brushless motor due to the power supplied to the brushless motor by the rotation control unit and the rotation direction of the rotor determined by the rotation direction determining unit;
- and
- an error determining unit configured to determine whether an error between a direction of an actual d-axis and a direction of an estimated d-axis is being within a predetermined magnetic pole determining permission range, the actual d-axis being a real d-axis of rotation coordinates of vector control, the estimated d-axis being an axis estimated to be a d-axis in the rotation coordinates, wherein
- the rotation control unit is configured to rotate the rotor, when the error is within the magnetic pole determining permission range, and
- the magnetic pole distinguishing unit is configured to distinguish the magnetic poles of the rotor by using the orientation of the current and the rotation direction of the rotor when the error is within the magnetic pole determining permission range.
Dependencies are inferred from the claim text.