| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wind rate control method for a blower capable of maintaining at a set wind rate by making motor load torque constant through control of supply voltage on the basis of changes of supply current and rotation speed of a DC motor. <P>SOLUTION: In the blower 3 for rotating a Sirocco fan 3 by the DC motor 2, the wind rate control method drives the DC motor 2 at fixed voltage, and detects changes of load torque of the DC motor 2 on the basis of a command load drive current value for attaining driving current, motor rotational speed, and the set wind rate actually supplied to the DC motor 2, and maintains motor generated torque at a value corresponding to the command load driving current value by controlling the drive voltage in response to changes of the load torque. <P>COPYRIGHT: (C)2011,JPO&INPIT |
