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 controlInfo
- 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
Links
Landscapes
- 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.
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)
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 |
-
2005
- 2005-02-04 TW TW094103766A patent/TW200629707A/en unknown
Cited By (4)
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
TW200709552A (en) | Integrated circuit for controlling motor speed | |
EP2573935A3 (en) | Motor control apparatus | |
WO2009069647A1 (en) | Switching power supply and driving method for the same | |
ATE548797T1 (en) | DEVICE AND METHOD FOR CONTROLLING A COMMON MODE VOLTAGE OF SWITCHING AMPLIFIER | |
WO2007003967A3 (en) | Switch mode power supply control systems | |
TW200737722A (en) | Fan system with hysteresis character and method thereof | |
TW200500267A (en) | Gear shift control for an assist bicycle | |
TW200721067A (en) | Source drivers having controllable output currents and related display devices and methods | |
DK1618321T3 (en) | Vejköretöj with auxiliary installation | |
WO2006093812A3 (en) | Light emitting device driver circuit | |
TW200721647A (en) | A DC to DC converter having linear mode and switch mode capabilities, a controller, a control method and an apparatus of said converter | |
WO2008117515A1 (en) | Motor control device, its control method, and motor device | |
EP1441441A3 (en) | Gate driving circuit | |
TW200514727A (en) | Speed change control device for bicycle | |
WO2009122333A3 (en) | High resolution digital modulator by switching between discrete pwm or ppm values | |
ATE505056T1 (en) | CIRCUIT ARRANGEMENT AND METHOD FOR CONTROLLING A CIRCUIT ARRANGEMENT | |
TW200719671A (en) | Case module having auto-folder function and control method thereof | |
TW200629707A (en) | Fan speed-adjusting system with Pulse Width Modulation (PWM) and external control | |
TW200709549A (en) | Current control device and method | |
TWI255975B (en) | Optical pointing system and method for controlling power and/or clock signal thereof | |
TW200509519A (en) | Rotation speed controller of motor | |
WO2008138454A3 (en) | Electric drive | |
TW200505148A (en) | Fan motor speed control circuit | |
WO2007130437A3 (en) | Switched mode power supply with frequency modulation control | |
TW200637135A (en) | Circuit and method for motor control |