| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fan control device that stably implements a fine control speed pitch in a low speed range of fan rotation while ensuring a wide fan speed adjustment range. <P>SOLUTION: The fan control device includes: a transformer 35 having a primary coil 36 supplied with a commercial AC power supply 33, and a secondary coil 37 with a plurality of secondary output terminals 38a-38e for transforming the voltage of the commercial AC power supply 33 in a plurality of stages; connection means 40 for selecting any one of the plurality of secondary output terminals 38a-38d to connect the secondary coil 37 to a drive motor 19 for a fan 4; and applied current control means 56 for controlling a current applied from the secondary coil 37 to the drive motor 19 when the connection means 40 connects the secondary output terminal 38e to the drive motor 19. <P>COPYRIGHT: (C)2013,JPO&INPIT |
