Motor control device, its control method, and motor device
AssigneePanasonic Corporation
InventorsYasuyuki Yokouchi, Yasushi Kato
Life of this patent
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Abstract
A motor control device controls a fan motor, and controls a motor speed so as to maintain a predetermined airflow value. For this, the motor control device includes an input terminal for inputting a first operation parameter indicating the motor speed or a second operation parameter indicating a motor torque. Moreover, the motor control device includes a motor-speed target value arithmetically-operating unit that calculates, using a predetermined airflow value and the motor torque, a necessary modified value for the motor speed at the predetermined time intervals. Further, the motor control device includes an output terminal that outputs an instruction speed of the motor based on the necessary modified value.
Claims21
A motor control device that controls a motor that drives a fan, comprising:
- an input terminal for inputting at least one of a first operation parameter indicating a motor speed and a second operation parameter indicating a motor torque;
- a motor-speed target value arithmetically-operating unit that calculates, using a predetermined airflow value and the motor torque, a necessary modified value for the motor speed at predetermined time intervals;
- and
- an output terminal that outputs an instruction speed of the motor based on the necessary modified value
- wherein the motor speed is controlled so that the predetermined airflow value is maintained,
- wherein the necessary modified value is obtained by multiplying a difference between the motor speed and a target value of the motor speed by a gain;
- or
- the necessary modified value is obtained by multiplying a difference between an instruction speed found last time and a target value of the motor speed by a gain,
- wherein the target value is found from the motor torque and the predetermined airflow value.
Dependencies are inferred from the claim text.