WO2014040468A1 - 一种散热风扇控制装置及电子设备 - Google Patents
一种散热风扇控制装置及电子设备 Download PDFInfo
- Publication number
- WO2014040468A1 WO2014040468A1 PCT/CN2013/081519 CN2013081519W WO2014040468A1 WO 2014040468 A1 WO2014040468 A1 WO 2014040468A1 CN 2013081519 W CN2013081519 W CN 2013081519W WO 2014040468 A1 WO2014040468 A1 WO 2014040468A1
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- WIPO (PCT)
- Prior art keywords
- fan
- signal
- protection module
- control system
- control
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20209—Thermal management, e.g. fan control
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/20—Cooling means
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B15/00—Systems controlled by a computer
- G05B15/02—Systems controlled by a computer electric
Definitions
- the invention relates to the technical field of electronic circuits, in particular to a cooling fan control device and an electronic device. Background technique
- the cooling fan control device usually controls the speed of the fan directly through the control signal when the fan is adjusted and monitored. This is directly connected directly to the fan through the control signal, and there are considerable hidden dangers and deficiencies. When the device is unstable or faulty, it cannot control the fan effectively. This will cause the fan status to be uncontrollable. For example, stop or slow speed can not meet the heat dissipation of the device, which may cause overheating of important chips in the device. Summary of the invention
- the object of the present invention is to provide a cooling fan control device for the problem that the reliability of the speed control of the fan of the heat dissipation fan control device is poor in the prior art.
- the cooling fan control device comprises: a first signal output end and a second signal output end of a control system for speed control and fan monitoring of a fan, respectively, and a first signal input end and a second signal of the protection module
- the signal input end is connected, and the protection module further comprises a control signal output end for outputting a fan speed control signal to the fan, the first signal is a normal indication signal of the control system, and the second signal is a fan speed control signal output by the control system, wherein
- the protection module control signal output end outputs the fan speed control signal provided by the control system. Otherwise, the protection module outputs its preset fan speed control signal to make the fan run stably.
- the third signal input end of the control system is connected to the third signal output end of the protection module, the protection module further includes a third signal input end, and the third signal is a fan speed signal, wherein when the control system operates normally, the indication signal is normal.
- the protection module has its third signal output and its third letter The input is internally connected.
- the third signal input end of the control system is connected to the third signal output end of the protection module, the protection module further includes a third signal input end, and the third signal is a fan speed signal, wherein when the control system runs normally, the indication signal is not Normally, the protection module disconnects its third signal output from its third signal input.
- the fourth signal input end of the control system is connected to the fourth signal output end of the protection module, and the fourth signal is the protection module response response feedback signal, wherein when the control system runs normally, the normal indication signal is normal, the fourth signal of the protection module
- the output output protection module responds to the feedback signal to the control system, informing the control system that the fan operation control is controlled by the control system.
- the method further includes an isolation module, wherein the control signal input end of the isolation module is connected to the control signal output end of the protection module, and the fan speed control signal output by the protection module is input by the control signal input end of the isolation module, and is provided in the isolation module.
- the first optocoupler is output by the isolation module control signal output.
- the third signal output end of the isolation module is connected to the third signal input end of the protection module, the third signal is input by the third signal input end of the isolation module, and the second optical coupling provided in the isolation module is separated by the isolation module.
- the isolation module is further provided with a peripheral pull-up pull-down resistor matched to the first optocoupler and the second optocoupler.
- the protection module is an integrated circuit chip or a programmable logic device.
- the present invention also provides an electronic device comprising a fan and the aforementioned device, the fan speed control signal outputted by the device being coupled to the fan.
- the fan is a four-wire speed regulating fan or a three-wire speed regulating fan.
- the controller when the protection module is not operating normally, the controller outputs a preset fan speed control signal to stabilize the fan, thereby enhancing the reliability of the fan speed control and improving the reliability of the cooling fan. stability.
- FIG. 1 is a structural diagram of a device according to an embodiment of the present invention.
- FIG. 2 is a schematic diagram of a fan isolation protection design provided by an embodiment of the present invention
- FIG. 3 is a flowchart of a method provided by an embodiment of the present invention. Preferred embodiment of the invention
- the cooling fan control device in the electronic device includes a control system 10 and a protection module 20, and the cooling fan control device may be a separate board and module.
- the control system 10 performs speed control and fan monitoring on the fan.
- the control system 10 includes an output terminal 11 and an output terminal 12.
- the protection module 20 includes an input terminal 21 and an input terminal 22.
- the output terminal 11 and the output terminal 12 are respectively connected to the input terminal 21 and the input terminal 22, and the control system 10 operates a normal indication signal from The output terminal 11 outputs to the input terminal 21, and the fan speed control signal PWM03 outputted by the control system 10 is output from the output terminal 12 to the input terminal 21.
- the protection module 20 further includes a control signal output terminal 25, and the protection module 20 passes through the control signal output terminal. 25 output fan speed control signal to the fan, wherein when the control system runs normally, the control signal output terminal 25 outputs the fan speed control signal output by the control system, otherwise the fan speed preset by itself is output.
- the control signal keeps the fan running stably.
- the control system controls the fan to be cut off, and the fan speed control signal preset by the protection module is outputted to stabilize the fan, thereby enhancing the speed control capability of the fan. Improve system reliability.
- the control system 10 further includes an input end 13.
- the protection module 20 further includes an output end 23.
- the input end 13 of the control system 10 is connected to the output end 23 of the protection module, and the output end 23 of the protection module 20 outputs a fan speed signal FG03 to the input end 13 of the control system 10.
- the protection module 20 further includes an input end 26, and the fan speed sent by the fan end The signal is input by the input terminal 26, wherein when the control system is operating normally, the protection signal is normal, the protection module communicates its output terminal 23 with its input terminal 26 such that the fan speed signal sent by the fan terminal is directly fed back to the control system 10.
- the protection module can also disconnect the output end 23 and the input end 26 thereof, so that the fan speed signal sent by the fan end is directly fed back to the protection module 20.
- the input 14 of the control system 10 is connected to the output 24 of the protection module, and the protection module answers
- the response feedback signal is output from the output terminal 24 to the input terminal 14 of the control system 10, wherein when the control system is operating normally, the output signal 24 outputs the protection module response response feedback signal to the control system to inform the control system Fan control is controlled by the control system.
- the control signal input terminal 35 of the isolation module 30 is connected to the control signal output terminal 25 of the protection module 20, and the fan speed control signal PWM02 output by the protection module 20 is input by the control signal input terminal 35 of the isolation module 30, and is provided in the isolation module 30.
- the first optocoupler 33 is outputted by the control signal output terminal 31 of the isolation module 30 to obtain a fan speed control signal PWM01 that has been isolated by the optocoupler.
- the output end 36 of the isolation module 30 is connected to the input end 26 of the protection module, and the fan speed signal FG01 sent by the fan end is input from the input end 32 of the isolation module 30.
- the second optocoupler 34 disposed in the isolation module is provided by the isolation module 30.
- the output 36 is output such that the output 36 of the isolation module 30 outputs the optically isolated fan speed signal FG02.
- the isolation module 30 is also provided with a peripheral pull-up pull-down resistor 37 that is matched to the first optocoupler 33 and the second optocoupler 34.
- the isolation module provides electrical isolation of the fan, greatly enhancing the immunity to interference.
- the basic structure of the electronic device includes a fan 40, including a fan 40 and the aforementioned cooling fan control device, and the fan speed control signal outputted by the device is connected to the fan.
- the solution of this embodiment enables the fan and the device control system to form two independent systems without direct electrical connection, and the cooling fan control device is unstable or faulty when the device is powered on, and the control system cannot effectively control the fan system.
- the protection module stabilizes the fan according to the state set in advance to meet the heat dissipation requirements of the device.
- the control system returns to normal and can effectively control and monitor the fan
- the protection module is notified to switch to the normal mode, and the fan is controlled by the control system. And monitoring. It can be seen from the above that the reliability and anti-interference of the fan on the electronic device can be greatly increased by the above solution.
- the embodiment of the invention further provides a method for controlling the speed control fan isolation, comprising: completely isolating the electrical connection on the control system by isolating the fan control signal and the fan speed signal, by adding protection control, The power-on is still unstable or faulty.
- the protection module controls the fan.
- the automatic switchover transfers the control of the fan to the control system.
- the cooling fan control device adds a photocoupler optical coupler isolation module to a fan speed control signal such as PWM (Pulse Width Modulation). Isolation is performed, and fan speed monitoring signals such as FG (Frequency Generator) are isolated to achieve complete electrical isolation of the control system and the fan system.
- PWM Pulse Width Modulation
- FG Frequency Generator
- the protection module stabilizes the fan according to the preset state to meet the heat dissipation requirements of the device.
- the protection module is notified to switch to the normal mode, and the fan is controlled and monitored by the control system.
- the PWM controls the fan speed according to the output duty ratio
- the FG specifically calculates the fan speed according to the fan feedback pulse frequency, and the fan outputs two high-to-low pulses one revolution.
- the electronic device is provided with a variable speed fan system, a control system, an isolation module and a protection module.
- the isolation system and the protection module electrically isolate the fan system and the control system, and through the protection module, when the control system is unstable or faulty, Control the fan system to ensure heat dissipation from the communication system.
- Fan system Contains various fans on the device.
- Control system It is mainly to control and monitor the speed of the fan; at the same time, output the normal operation information to inform the protection module.
- Isolation module Complete electrical isolation of the fan system and control system, mainly through optocouplers.
- Protection module When the device is unstable or faulty, the fan is controlled to meet the heat dissipation requirements of the device. When the control system returns to normal, the fan can be effectively controlled and monitored. The protection mode is turned off, and the fan speed PWM signal and fan speed are adjusted. The signal is connected to the control system, that is, the control is transferred to the control system, and the control system controls and monitors the fan.
- the method for protecting the fan isolation includes the following steps:
- Step A Power on the device (including the fan system and control system).
- Step B Start the protection module.
- the fan system is controlled by the protection module and works in the protection state.
- Step C The control system initialization is completed (system startup is completed), and the protection module is notified by the control system running normal indication signal to prepare to control the fan system.
- Step D The protection module outputs a response feedback signal to the control system for simultaneous path switching, and the control system controls the fan.
- Step E. The protection module monitors the normal operation indication signal sent by the control system in real time. Once the system fails, the protection module is started in time and the path is switched.
- the above steps are only the starting steps when the protection device is used, and the isolation module always works.
- the present invention fully utilizes the existing interfaces and systems of the single board or the system, such as the control system and the fan system, and only adds the optocoupler isolation module and the protection module, which is very simple and convenient to implement.
- the method of isolation protection has lower system requirements, is easy to implement, has low cost, and has universal significance, which reduces the difficulty of system development and improves the reliability of the system. There is no need to consider providing additional circuit interfaces in the system design, which increases the flexibility of system design.
- the basic idea of the embodiment of the present invention is: using an optocoupler for electrical isolation and related logic control.
- the protection module forcibly controls the fan to operate according to the preset condition of the protection device.
- the heat dissipation needs of the system to achieve the purpose of protecting the device, and to make the circuit to achieve this function to be the simplest and most optimized.
- the electronic device provided by the present invention is further described in detail below, and mainly includes: a fan system, including each fan in the communication system, and a fan 40 is illustrated in the figure.
- a fan system including each fan in the communication system
- a fan 40 is illustrated in the figure.
- the speed fan has four lines of PWM speed control signal and FG fan speed feedback signal.
- the fan speed is controlled by controlling the PWM signal, and the fan running status is monitored by the FG signal.
- Other types of fans Can be referenced, such as three-wire speed control fan, that is, only fan power positive, power negative and PWM fan speed signal.
- the fan speed feedback signal can be omitted, and the isolation protection function can be realized without the fan feedback signal.
- the isolation module 30 includes an optocoupler 33 and an optocoupler 34 and a matching peripheral pull-up resistor 37.
- the optocoupler is a unidirectional device, and one signal uses an optocoupler, that is, one fan has PWM and FG. The signal is to be isolated and transmitted by two optocouplers.
- the pull-up resistor on the periphery mainly satisfies the level matching of the PWM and FG signals.
- the protection module 20 the main function is to monitor the state of the control system in real time. Once the control system is unstable or fails, the connection between the PWM03 and FG03 signals of the control system and the isolation module 30 is disconnected, and the switching mode is switched by the protection module itself.
- the output control signal PWM02 controls the fan, and monitors the FG02 fan speed signal.
- the protection module 20 can pass a simple logic circuit, such as a PI3B16244 IC chip or a PLD (Programmable Logic Device). achieve.
- the working principle of the protection module 20 is to monitor the "normal control signal of the control system" in real time.
- the switching mode is controlled by the protection module itself to output the PW02 signal.
- the FG02 signal is also detected by the protection module.
- This process can be understood as a switch. Switching process.
- Implementation method It is simple to use the "control system to run normal indication signal" to switch control. It can also be used as a trigger signal, which is automatically switched by the protection module.
- the protection module can set a timing counting device, timing The counting device can be realized by logic.
- the normal indication signal of the control system is used as the clearing control. When the system is abnormal, such as a crash, the signal is abnormal, and the timing counting device cannot be cleared. When the counting is full, the protection module is triggered to perform switching. .
- the protection module When the real-time monitoring "control system operation normal indication signal" is normal, the protection module outputs "protection module response response feedback signal" to the control system, informing the control system that the fan can be normally controlled and detected, which can be understood as the fan control monitoring right. Handed over to the control system.
- the control system 10 the main function is to speed control and fan monitoring of the fan in the normal mode, and inform the protection module of its own operating state.
- FIG. 2 shows an example of the fan isolation protection design.
- R1 ⁇ R8 are pull-up pull-up resistors.
- the specific resistance value can be adjusted according to actual needs, such as 1 k ⁇ or 10 k ⁇
- VCC and VDD are power supplies.
- the power supply voltage can be selected according to the specific design circuit. For example, VCC uses +3.3 V power supply, VDD uses +5 V power supply, FAN POWER+ is the fan positive power supply, and FAN POWER- is the fan negative power supply.
- the logic chip illustrated in the protection module 103 represents the "PI3B16244 chip or Programmable Logic Device (PLD)" described above.
- the isolation module always works, and only the protection module startup process is described here.
- the implementation process of the fan isolation protection method of this embodiment can be referred to FIG. 3, and mainly includes the following steps:
- Step 201 The device is powered on, which can also be understood as the system startup.
- Step 202 When the system is just powered on or just started, the control system has not been running normally.
- the default fan is controlled by the protection module 30, that is, PWM03 and FG03 are in the off state, and are not connected to PWM02 and FG02 respectively.
- Step 203 The protection module 30 detects "the normal operation indication signal of the control system", and determines whether the control system is operating normally. If it is normal, the process proceeds to step 204. If not, the process returns to step 202.
- Step 204 The detection control system runs normally, and the protection module switches the switch, so that the PWM03 is connected to the PMW02, and the FG03 is connected to the FG02, that is, the fan state control and the monitoring signal are sent to the control system 104 for processing, and the control is notified by the "protection module response response feedback signal".
- the system, the fan monitoring right is handed over, and the control system can monitor the fan normally.
- Step 205 The control system 10 determines, according to the “protection module response response feedback signal”, that the fan can be normally adjusted and monitored, and the fan operating state is adjusted as needed. At the same time, the protection module 103 also monitors the "control system operation normal indication signal" in real time.
- Step 206 The normal startup process ends, and when the protection module detects that the "control system operation normal indication signal" is abnormal, the process jumps to step 202.
- the controller when the protection module is not operating normally, the controller outputs a preset fan speed control signal to stabilize the fan, thereby enhancing the reliability of the fan speed control and improving the reliability of the cooling fan. stability.
Abstract
Description
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/427,371 US9967999B2 (en) | 2012-09-11 | 2013-08-15 | Device for controlling heat dissipation fan and electronic equipment |
KR1020157009421A KR101690123B1 (ko) | 2012-09-11 | 2013-08-15 | 방열 팬 제어 장치 및 전자 설비 |
RU2015112867A RU2614982C2 (ru) | 2012-09-11 | 2013-08-15 | Устройство для управления теплорассеивающим вентилятором и электронное оборудование |
BR112015005383-1A BR112015005383B1 (pt) | 2012-09-11 | 2013-08-15 | Dispositivo para controle de um ventilador de dissipação de calor e um equipamento eletrônico |
EP13836575.4A EP2897023B1 (en) | 2012-09-11 | 2013-08-15 | Device for controlling heat dissipation fan and electronic equipment |
Applications Claiming Priority (2)
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CN201210334065.0A CN102828980B (zh) | 2012-09-11 | 2012-09-11 | 一种散热风扇控制装置及电子设备 |
CN201210334065.0 | 2012-09-11 |
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WO2014040468A1 true WO2014040468A1 (zh) | 2014-03-20 |
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PCT/CN2013/081519 WO2014040468A1 (zh) | 2012-09-11 | 2013-08-15 | 一种散热风扇控制装置及电子设备 |
Country Status (7)
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US (1) | US9967999B2 (zh) |
EP (1) | EP2897023B1 (zh) |
KR (1) | KR101690123B1 (zh) |
CN (1) | CN102828980B (zh) |
BR (1) | BR112015005383B1 (zh) |
RU (1) | RU2614982C2 (zh) |
WO (1) | WO2014040468A1 (zh) |
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CN103382945B (zh) * | 2013-07-08 | 2016-12-28 | 大唐移动通信设备有限公司 | 一种风扇控制系统 |
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- 2013-08-15 RU RU2015112867A patent/RU2614982C2/ru active
- 2013-08-15 KR KR1020157009421A patent/KR101690123B1/ko active IP Right Grant
- 2013-08-15 EP EP13836575.4A patent/EP2897023B1/en active Active
- 2013-08-15 WO PCT/CN2013/081519 patent/WO2014040468A1/zh active Application Filing
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Publication number | Publication date |
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BR112015005383B1 (pt) | 2022-03-15 |
RU2614982C2 (ru) | 2017-04-03 |
CN102828980B (zh) | 2015-04-29 |
CN102828980A (zh) | 2012-12-19 |
KR101690123B1 (ko) | 2016-12-27 |
EP2897023B1 (en) | 2019-03-27 |
EP2897023A4 (en) | 2015-09-23 |
KR20150058314A (ko) | 2015-05-28 |
RU2015112867A (ru) | 2016-11-10 |
US20150237765A1 (en) | 2015-08-20 |
BR112015005383A2 (pt) | 2019-11-26 |
US9967999B2 (en) | 2018-05-08 |
EP2897023A1 (en) | 2015-07-22 |
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