Patent ID: 8297068
Filing Date: 2012-10-30
Classification: F04D,H02P,Y02B

Abstract:
1. 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 wherein the target value is found from the motor torque and the predetermined airflow value.