MOTOR DRIVE CONTROL DEVICE
First Claim
1. A motor drive control device that uses a rotor position sensorless control scheme to drive a motor having a rotor and a stator, the motor drive control device comprising:
- a rotational speed deriving component configured to derive a rotational speed of the motor at least at a time when the motor is in a state just before startup of the motor;
a startup component configured to start up the motor by outputting to the motor a drive signal based on at least one ofa direct-current excitation scheme that fixes the rotor position in a predetermined position by performing direct-current energization with respect to the motor anda forced drive scheme that accelerates the motor to a predetermined rotational speed by performing forced energization that applies a predetermined voltage and frequency with respect to the motor; and
a changing component configured to change the drive signal based on at least one of the direct-current excitation scheme and the forced drive scheme in accordance with the rotational speed of the motor that the rotational speed deriving component has derived.
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Accused Products
Abstract
A motor drive control device uses a rotor position sensorless control scheme to drive a motor. The motor drive control device includes a rotational speed deriving component, a startup component and a changing component. The rotational speed deriving component derives rotational speed of the motor just before startup of the motor. The startup component starts up the motor by outputting to the motor a drive signal based on at least one of a direct-current excitation scheme that fixes the rotor position in a predetermined position by performing direct-current energization, and a forced drive scheme that accelerates the motor to a predetermined rotational speed by performing forced energization that applies a predetermined voltage and frequency. The changing component changes the drive signal based on at least one of the direct-current excitation scheme and the forced drive scheme in accordance with the rotational speed of the motor derived.
15 Citations
16 Claims
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1. A motor drive control device that uses a rotor position sensorless control scheme to drive a motor having a rotor and a stator, the motor drive control device comprising:
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a rotational speed deriving component configured to derive a rotational speed of the motor at least at a time when the motor is in a state just before startup of the motor; a startup component configured to start up the motor by outputting to the motor a drive signal based on at least one of a direct-current excitation scheme that fixes the rotor position in a predetermined position by performing direct-current energization with respect to the motor and a forced drive scheme that accelerates the motor to a predetermined rotational speed by performing forced energization that applies a predetermined voltage and frequency with respect to the motor; and a changing component configured to change the drive signal based on at least one of the direct-current excitation scheme and the forced drive scheme in accordance with the rotational speed of the motor that the rotational speed deriving component has derived. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification