Motor control device and motor control method
AssigneeNidec Corporation
InventorsTomoyuki Tanisugi, Yuji Nakamaru
Life of this patent
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Abstract
One exemplary embodiment of the present invention is a motor control device configured to control rotation of a motor based on a drive signal input from an input terminal wherein the motor control device extracts two or more pieces of information of first drive information indicating a drive state or a drive stop state of the motor, second drive information indicating a rotation direction of the motor, third drive information indicating whether the motor is in a forced stop state, and fourth drive information indicating a rotational speed of the motor from at least one of a duty ratio, a voltage, and a frequency in the single drive signal, and controls the motor.
Claims12
A motor control device configured to control rotation of a motor based on a single drive signal input from an input terminal, wherein
- the motor control device stores a table in which at least one of a duty ratio, a voltage, and a frequency in the single drive signal is divided into a plurality of ranges;
- the motor control device extracts two or more pieces of information including first drive information indicating a drive state or a drive stop state of the motor, second drive information indicating a rotation direction of the motor, third drive information indicating whether the motor is in a forced stop state, and fourth drive information indicating a rotational speed of the motor from the at least one of the duty ratio, the voltage, and the frequency in the single drive signal, and controls the motor according to the extracted two or more pieces of information;
- in the table, a boundary range which has no drive signal is included in a boundary between adjacent ranges associated with the first drive information, the second drive information, and the third drive information;
- and
- when the at least one of the duty ratio, the voltage, and the frequency in the single drive signal changes and is in the boundary range, information associated with a range including the at least one of the duty ratio, the voltage, and the frequency in the single drive signal before changing is extracted.
A motor control method through which drive of a motor is controlled based on a drive signal, comprising:
- storing a table in which at least one of a duty ratio, a voltage, and a frequency in the single drive signal is divided into a plurality of ranges;
- wherein
- first drive information indicating a drive state or a drive stop state of the motor, second drive information indicating a rotation direction of the motor, third drive information indicating whether the motor is in a forced stop state, and fourth drive information indicating a rotational speed of the motor are included in the single drive signal,
- two or more pieces of information of the first drive information, the second drive information, the third drive information, and the fourth drive information are included in the at least one of the duty ratio, the voltage, and the frequency of the drive signal, and
- two or more pieces of information of the first drive information, the second drive information, the third drive information, and the fourth drive information are extracted from the drive signal to control the motor according to the extracted two or more pieces of information;
- in the table, a boundary range which has no drive signal is included in a boundary between adjacent ranges associated with the first drive information, the second drive information, and the third drive information;
- and
- when the at least one of the duty ratio, the voltage, and the frequency in the single drive signal changes and is in the boundary range, information associated with a range including the at least one of the duty ratio, the voltage, and the frequency in the single drive signal before changing is extracted.
Dependencies are inferred from the claim text.