MOTOR CONTROL APPARATUS FOR CONTROLLING MOTOR BASED ON COUNTER-ELECTROMOTIVE VOLTAGE GENERATED IN WINDING OF MOTOR
First Claim
1. A motor control apparatus comprising:
- a counter-electromotive voltage determination unit configured to determine a counter-electromotive voltage that is generated in a winding of a motor;
a position determination unit configured to determine a rotational position of a rotor of the motor based on the determined counter-electromotive voltage;
a velocity determination unit configured to determine a first velocity, which is a rotational velocity of the rotor, based on change in the rotational position per unit time;
a correction unit configured to obtain a second velocity by correcting the first velocity based on a harmonic component included in the first velocity; and
a driving unit configured to drive the motor based on the second velocity and the rotational position,wherein the correction unit includes;
an extraction unit configured to extract the harmonic component; and
an error reduction unit configured to obtain the second velocity by reducing error in the first velocity that occurs due to the harmonic component.
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Accused Products
Abstract
A motor control apparatus includes: a unit configured to determine a counter-electromotive voltage in a winding of a motor; a unit configured to determine a rotational position of a rotor of the motor based on the counter-electromotive voltage; a unit configured to determine a first velocity of the rotor, based on change in the rotational position; a correction unit configured to obtain a second velocity by correcting the first velocity based on a harmonic component included in the first velocity; and a driving unit configured to drive the motor based on the second velocity and the rotational position. The correction unit includes a unit configured to obtain the second velocity by reducing error in the first velocity that occurs due to the harmonic component.
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Citations
17 Claims
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1. A motor control apparatus comprising:
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a counter-electromotive voltage determination unit configured to determine a counter-electromotive voltage that is generated in a winding of a motor; a position determination unit configured to determine a rotational position of a rotor of the motor based on the determined counter-electromotive voltage; a velocity determination unit configured to determine a first velocity, which is a rotational velocity of the rotor, based on change in the rotational position per unit time; a correction unit configured to obtain a second velocity by correcting the first velocity based on a harmonic component included in the first velocity; and a driving unit configured to drive the motor based on the second velocity and the rotational position, wherein the correction unit includes; an extraction unit configured to extract the harmonic component; and an error reduction unit configured to obtain the second velocity by reducing error in the first velocity that occurs due to the harmonic component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A motor control apparatus comprising:
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a counter-electromotive voltage determination unit configured to determine a counter-electromotive voltage that is generated in a winding of a rotor of the motor; a position determination unit configured to determine a first position, which is a rotational position of a rotor, based on the determined counter-electromotive voltage; a correction unit configured to correct the first position based on a harmonic component included in the first position to obtain a second position; a velocity determination unit configured to determine a rotational velocity of the rotor based on change in the second position per unit time; and a drive unit configured to drive the motor based on the second position and the rotational velocity, wherein the correction unit includes; an extraction unit configured to extract the harmonic component; and an error reduction unit configured to obtain the second position by reducing error in the first position, which occurs due to the harmonic component. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification