BLOWER DEVICE AND DRIVING DEVICE FOR FLUID FORCE-FEEDER

摘要

PROBLEM TO BE SOLVED: To provide a low-cost blower device provided with constant air quantity performance of high accuracy. SOLUTION: This blower device is provided with a rotating speed detecting means 12 for detecting the rotating speed of a motor 5 for rotating an impeller; an arithmetic control part 10 for controlling a current applied to the motor 5; a current detecting means 13 for detecting a current applied to the motor 5; and an air quantity setting means 14 for setting the air quantity. The rotating speed of the motor 5 and the current value applied to the motor respectively detected by the rotating speed detecting means 12 and the current detecting means 13 are current-controlled to the rotating speed and current value corresponding to the value set by the air quantity setting means 14, by the arithmetic control part 10 on the basis of a relational expression of C determined by a working point based on the air quantity/rotating speed and K determined by a working point based on the square of current value/rotating speed.