Title:
ファンモータ速度制御回路、ファン装置、電子機器
Document Type and Number:
Japanese Patent JP5127324
Kind Code:
B2
Abstract:
A fan motor speed control circuit includes: a driving circuit configured to drive a fan motor so as to run at a rotation speed corresponding to a drive signal; a comparison circuit configured to output a comparison signal for matching a rotation speed of the fan motor with a target rotation speed, based on a reference signal corresponding to the target rotation speed of the fan motor and a speed signal corresponding to the rotation speed of the fan motor; and a selection circuit configured to output to the driving circuit the drive signal corresponding to one signal out of the reference signal and the comparison signal, the one signal being a signal by which the fan motor is driven at a higher rotation speed.
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Inventors:
Tetsuya Yoshitomi
Takashi Harashima
Takashi Harashima
Application Number:
JP2007175360A
Publication Date:
January 23, 2013
Filing Date:
July 03, 2007
Export Citation:
Assignee:
ON Semiconductor Trading Limited
International Classes:
H02P7/29
Domestic Patent References:
| JP2007068344A | ||||
| JP2005151792A | ||||
| JP9247976A | ||||
| JP2002165477A |
Foreign References:
| US5942866 | ||||
| US6385395 |
Attorney, Agent or Firm:
Isshiki International Patent Service Corporation