TW200629707A - Fan speed-adjusting system with Pulse Width Modulation (PWM) and external control - Google Patents

Fan speed-adjusting system with Pulse Width Modulation (PWM) and external control

Info

Publication number
TW200629707A
TW200629707A TW094103766A TW94103766A TW200629707A TW 200629707 A TW200629707 A TW 200629707A TW 094103766 A TW094103766 A TW 094103766A TW 94103766 A TW94103766 A TW 94103766A TW 200629707 A TW200629707 A TW 200629707A
Authority
TW
Taiwan
Prior art keywords
signal
fan motor
pwm
fan
control
Prior art date
Application number
TW094103766A
Other languages
Chinese (zh)
Inventor
Hsiang-Chieh Tseng
Kuo-Jung Kao
Original Assignee
Giga Byte Tech Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giga Byte Tech Co Ltd filed Critical Giga Byte Tech Co Ltd
Priority to TW094103766A priority Critical patent/TW200629707A/en
Publication of TW200629707A publication Critical patent/TW200629707A/en

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  • Control Of Electric Motors In General (AREA)

Abstract

This invention reveals a fan speed-adjusting system with Pulse Width Modulation (PWM) and external control. It comprises a fan motor, a fan speed-adjusting circuit, a PWM signal-inputting terminal, and an external control switch. The fan speed-adjusting circuit receives an input signal and outputs a control signal to control and change the rotation speed of a fan motor. Via a switch unit, the PWM signal input terminal couples with the fan motor, it provides a PWM signal input. According to the operation period of the PWM signal, it transforms into an analog voltage signal with different levels transmitted to the fan motor. The analog voltage signal accords with the control signal to control and change the rotation speed of the fan motor. The external control switch couples with the switch unit and the fan speed-adjusting circuit, it provides a linear control signal into the fan speed-adjusting circuit. The control signal is based on the linear control signal. Eventually, according to the various levels of analog voltage signal, the fan motor controls and changes the rotation speed of a fan motor.
TW094103766A 2005-02-04 2005-02-04 Fan speed-adjusting system with Pulse Width Modulation (PWM) and external control TW200629707A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW094103766A TW200629707A (en) 2005-02-04 2005-02-04 Fan speed-adjusting system with Pulse Width Modulation (PWM) and external control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW094103766A TW200629707A (en) 2005-02-04 2005-02-04 Fan speed-adjusting system with Pulse Width Modulation (PWM) and external control

Publications (1)

Publication Number Publication Date
TW200629707A true TW200629707A (en) 2006-08-16

Family

ID=57808993

Family Applications (1)

Application Number Title Priority Date Filing Date
TW094103766A TW200629707A (en) 2005-02-04 2005-02-04 Fan speed-adjusting system with Pulse Width Modulation (PWM) and external control

Country Status (1)

Country Link
TW (1) TW200629707A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101813093B (en) * 2009-02-25 2011-12-28 建准电机工业股份有限公司 Fan with improved rotational speed control module and fan group constituted thereby
CN102022314B (en) * 2009-09-11 2013-10-23 技嘉科技股份有限公司 Testing tool and testing system of fan
TWI580171B (en) * 2016-03-30 2017-04-21 國立虎尾科技大學 Driving circuit for speed adjustment of ac motor and ac motor system using the same
TWI621779B (en) * 2017-04-20 2018-04-21 保銳科技股份有限公司 Fan control apparatus and method of operating the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101813093B (en) * 2009-02-25 2011-12-28 建准电机工业股份有限公司 Fan with improved rotational speed control module and fan group constituted thereby
CN102022314B (en) * 2009-09-11 2013-10-23 技嘉科技股份有限公司 Testing tool and testing system of fan
TWI580171B (en) * 2016-03-30 2017-04-21 國立虎尾科技大學 Driving circuit for speed adjustment of ac motor and ac motor system using the same
TWI621779B (en) * 2017-04-20 2018-04-21 保銳科技股份有限公司 Fan control apparatus and method of operating the same

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