CN103727047B - 风扇控制电路 - Google Patents

风扇控制电路 Download PDF

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CN103727047B
CN103727047B CN201210381737.3A CN201210381737A CN103727047B CN 103727047 B CN103727047 B CN 103727047B CN 201210381737 A CN201210381737 A CN 201210381737A CN 103727047 B CN103727047 B CN 103727047B
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pin
monitoring chip
resistance
voltage source
chip
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CN103727047A (zh
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吴亢
田波
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Bengbu Hetai Electronic Information Technology Co ltd
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Qingdao Rubber Valley Intellectual Property Co Ltd
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Priority to TW101138150A priority patent/TW201422118A/zh
Priority to US13/891,177 priority patent/US20140097781A1/en
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    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00Control of temperature
    • G05D23/19Control of temperature characterised by the use of electric means
    • G05D23/20Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16Constructional details or arrangements
    • G06F1/20Cooling means
    • G06F1/206Cooling means comprising thermal management
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00Control of temperature
    • G05D23/19Control of temperature characterised by the use of electric means
    • G05D23/1927Control of temperature characterised by the use of electric means using a plurality of sensors
    • G05D23/193Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces
    • G05D23/1931Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces to control the temperature of one space
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00Control of temperature
    • G05D23/19Control of temperature characterised by the use of electric means
    • G05D23/20Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26Power supply means, e.g. regulation thereof
    • G06F1/32Means for saving power
    • G06F1/3203Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3206Monitoring of events, devices or parameters that trigger a change in power modality
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26Power supply means, e.g. regulation thereof
    • G06F1/32Means for saving power
    • G06F1/3203Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3234Power saving characterised by the action undertaken
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00Energy efficient computing, e.g. low power processors, power management or thermal management

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Human Computer Interaction (AREA)
  • Remote Sensing (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)

Abstract

一种风扇控制电路,包括一温度侦测模块及一控制模块。所述温度侦测模块包括至少一靠近于显卡芯片设置的第一热敏电阻。所述控制模块包括一监控芯片及一寄存器,所述监控芯片用于通过第一热敏电阻侦测显卡芯片的温度,所述寄存器内存储有若干温度值及占空比,且每一温度值对应一占空比,所述监控芯片还用于根据温度值输出具有对应占空比的控制信号至风扇连接器,以控制风扇的转速。上述风扇控制电路可根据显卡的温度对应调节显卡风扇的转速。

Description

风扇控制电路
技术领域
本发明涉及一种风扇控制电路。
背景技术
随着计算机技术的发展,我们日常所使用的计算机的显卡也在一直升级,这样导致显卡的功耗越来越大,发热量随即急剧增加,而目前的显卡来讲,都没有一个自动调节风扇转速的功能。所以这样在一定程度上存在着电能的浪费。
发明内容
鉴于以上内容,有必要提供一种使用于显卡的风扇控制电路。
一种风扇控制电路,包括:
一温度侦测模块,包括至少一靠近于显卡芯片设置的第一热敏电阻;以及
一控制模块,包括一监控芯片及一寄存器,所述监控芯片用于通过第一热敏电阻侦测显卡芯片的温度,所述寄存器内存储有若干温度值及占空比,且每一温度值对应一占空比,所述监控芯片还用于根据温度值输出具有对应占空比的控制信号至风扇连接器,以控制风扇的转速。
上述风扇控制电路通过热敏电阻实时侦测显卡芯片的温度,并根据温度输出对应的PWM信号,以控制风扇的转速,可避免显卡在处理小数据的程序时,风扇仍然全速运转所带来的电能浪费。
附图说明
图1是本发明风扇控制电路的较佳实施方式的方框图。
图2是图1中风扇控制电路的电路图。
主要元件符号说明
温度侦测模块 10
控制模块 12
风扇连接器 18、J1
风扇 16
热敏电阻 TH1-TH3
电阻 R1-R16
电容 C1-C8
三极管 Q1、Q2
二极管 D1
监控芯片 U1
寄存器 U2
时钟芯片 X1
如下具体实施方式将结合上述附图进一步说明本发明。
具体实施方式
下面结合附图及较佳实施方式对本发明作进一步详细描述:
请参考图1,本发明风扇控制电路用于控制一为显卡散热的风扇16,所述风扇控制电路的较佳实施方式包括一温度侦测模块10及一控制模块12。
本实施方式中,所述温度侦测模块10包括三个热敏电阻TH1、TH2及TH3,该热敏电阻TH1及TH2分别设置于显卡的最左端及最右端,该热敏电阻TH3则靠近显卡芯片而设置,如此,该温度侦测模块10能比较准确的测量显卡所在的系统环境中的环境温度值以及显卡芯片的温度值。
所述控制模块12包括一监控芯片U1及一寄存器U2。所述监控芯片U1与温度侦测模块10相连,用于接收温度侦测模块10所侦测得到的温度值。所述寄存器U2内存储有转速控制表,该转速控制表内存储有若干温度值及与温度值对应的控制风扇转速的脉冲控制(PWM)信号的占空比。该监控芯片U1还用于根据得到的温度值及转速控制表输出对应占空比的脉冲控制信号,以控制风扇16的转速。同时,该监控芯片U1还用于接收来自风扇16的转速信号,以得知此时风扇16的实际转速。
请参考图2,所述监控芯片U1的电压感测引脚VSEN2、VSEN4及VSEN6分别通过热敏电阻TH1、TH2及TH3接地,还分别通过电阻R1、R2及R3之后通过电容C1接地。所述监控芯片U1的电压感测引脚VSEN3及VSEN5接地。所述监控芯片U1的接地引脚VREF通过电容C1接地,另一接地引脚GND直接接地。所述监控芯片U1的电压引脚3VDD与电压源P3V3相连,还通过电容C2接地,所述电容C2与电容C3并联连接。所述监控芯片U1的电压引脚3VSB与电压源P3V3A相连,还通过电容C4接地,所述电容C5与电容C4并联连接。
所述监控芯片U1的电压感测引脚VSEN1与电压源PVTT相连,还直接通过电容C6接地。所述监控芯片U1的时钟引脚CLK1通过电阻R4与时钟芯片X1的输出引脚OUT相连,所述时钟芯片X1的接地引脚GND接地,电压引脚VDD与电压源P3V3A相连,还通过电容C7接地,所述时钟芯片X1的使能引脚OE通过电阻R5与电压源P3V3A相连。
所述监控芯片U1的预警引脚ALM通过电阻R6与电压源P3V3A相连,脉冲信号引脚PWM依序通过电阻R7及R17与三极管Q1的基极相连,所述三极管Q1的发射极接地,所述电阻R7与R17之间的节点还通过电阻R14与电压源P3V3相连,所述三极管Q1的集电极通过电阻R15与电压源P3V3相连,还直接与三极管Q2的基极相连,所述三极管Q2的发射极接地,集电极通过电阻R16与电压源P3V3相连,还直接与风扇连接器J1的控制引脚CTL相连。所述监控芯片U1的风扇引脚FAN依序通过电阻R8及R9与风扇连接器J1的转速引脚TACH相连,所述风扇连接器J1的转速引脚TACH还直接通过电阻R10与电压源P12V相连,所述电压源P12V与二极管D1的阴极相连,所述二极管D1的阳极与风扇连接器J1的转速引脚TACH相连。所述风扇连接器J1的电压引脚VCC与电压源P12V相连,还直接通过电容C8接地,所述风扇连接器J1的接地引脚GND接地。
所述监控芯片U1的地址引脚ADD0通过电阻R9与电压源P3V3A相连,还直接通过电阻R10接地。所述监控芯片U1的数据引脚DATA与寄存器U2的串行数据引脚SDA相连,还通过电阻R11与电压源P3V3A相连。所述寄存器U2的数据引脚A0、A1及A2相连之后通过电阻R12接地,所述寄存器U2的接地引脚GND接地,所述寄存器U2的电压引脚VCC与电压源P3V3A相连,还直接通过电容C9接地,所述寄存器U2的写入控制引脚WP通过电阻R13接地,时钟引脚SCL与监控芯片U1的时钟输出引脚CLK2相连,所述监控芯片U1的时钟输出引脚CLK2还通过电阻R14与电压源P3V3A相连。
下面将对上述风扇控制电路的工作原理进行说明:
所述热敏电阻TH1、TH2及TH3实时侦测显卡所在的系统环境中的环境温度值以及显卡芯片的温度值,并根据温度对应改变自身的电阻值。所述监控芯片U1实时通过其电压感测引脚VSEN2、VSEN4及VSEN6得到对应的温度值。所述监控芯片U1根据得到的温度值以及存储在寄存器U2内的转速控制表计算出对应的控制信号的占空比。之后输出给风扇连接器18的控制引脚CTL,进而得以控制风扇16的转速。比如,当监控芯片U1的脉冲信号引脚PWM输出高电平信号时,三极管Q1导通,三极管Q2截止,风扇连接器18的控制引脚CTL将接收到高电平信号;当监控芯片U1的脉冲信号引脚PWM输出低电平信号时,三极管Q1截止,三极管Q2导通,风扇连接器18的控制引脚CTL将接收到低电平信号。
同时,所述风扇16还通过风扇连接器18的侦测引脚TACH输出此时风扇16的转速至风扇引脚FAN,以使得控制模块12能得知此时风扇16的转速,进而可以判断风扇16是否被正确控制。
上述风扇控制电路通过热敏电阻TH1、TH2及TH3实时侦测显卡的温度,并通过监控芯片U1来根据温度输出对应的控制信号,以控制风扇16的转速,可避免显卡在处理小数据的程序时,风扇16仍然全速运转所带来的电能浪费。

Claims (1)

1.一种风扇控制电路,包括:
一温度侦测模块,包括至少一靠近于显卡芯片设置的第一热敏电阻;以及
一控制模块,包括一监控芯片及一寄存器,所述监控芯片用于通过第一热敏电阻侦测显卡芯片的温度,所述寄存器内存储有若干温度值及占空比,且每一温度值对应一占空比,所述监控芯片还用于根据温度值输出具有对应占空比的控制信号至风扇连接器,以控制风扇的转速;所述温度侦测模块还包括第二及第三热敏电阻,其中第二热敏电阻放置于显卡的一端,第三热敏电阻放置于显卡的另一端;所述监控芯片的第一至第三电压感测引脚分别通过第一至第三热敏电阻接地,还分别通过第一至第三电阻之后通过第一电容接地,所述监控芯片的第四及第五电压感测引脚接地,所述监控芯片的第一接地引脚通过第一电容接地,所述监控芯片的第二接地引脚接地,所述监控芯片的第一电压引脚与第一电压源相连,还通过第二电容接地,第三电容与所述第二电容并联连接,所述监控芯片的第二电压引脚与第二电压源相连,还通过第四电容接地,第五电容与所述第四电容并联连接,所述监控芯片的第六电压感测引脚与第三电压源相连,还直接通过第六电容接地,所述监控芯片的时钟引脚通过第四电阻与时钟芯片的输出引脚相连,所述时钟芯片的接地引脚接地,所述时钟芯片的电压引脚与第二电压源相连,还通过第七电容接地,所述时钟芯片的使能引脚通过第五电阻与第二电压源相连,所述监控芯片的预警引脚通过第六电阻与第二电压源相连,所述监控芯片的脉冲信号引脚通过第七电阻与第一三极管的基极相连,所述第一三极管的发射极接地,所述第一三极管的基极还通过第七电阻与第一电压源相连,所述第一三极管的集电极通过第八电阻与第一电压源相连,还直接与第二三极管的基极相连,所述第二三极管的发射极接地,所述第二三极管的集电极通过第九电阻与第一电压源相连,所述第二三极管的集电极还直接与风扇连接器的控制引脚相连,所述监控芯片的风扇引脚依序通过第十及第十一电阻与风扇连接器的转速引脚相连,所述风扇连接器的转速引脚还直接通过第十二电阻与第四电压源相连,所述第四电压源与二极管的阴极相连,所述二极管的阳极与风扇连接器的转速引脚相连,所述风扇连接器的电压引脚与第四电压源相连,所述风扇连接器的电压引脚还直接通过第八电容接地,所述风扇连接器的接地引脚接地,所述监控芯片的地址引脚通过第十三电阻与第二电压源相连,所述监控芯片的地址引脚还直接通过第十四电阻接地,所述监控芯片的数据引脚与寄存器的串行数据引脚相连,所述监控芯片的数据引脚还直接通过第十五电阻与第二电压源相连,所述寄存器的第一至第三数据引脚相连之后通过第十六电阻接地,所述寄存器的接地引脚接地,所述寄存器的电压引脚与第二电压源相连,所述寄存器的电压引脚还直接通过第九电容接地,所述寄存器的写入控制引脚通过第十七电阻接地,所述寄存器的时钟引脚与监控芯片的时钟输出引脚相连,所述监控芯片的时钟输出引脚还直接通过第十八电阻与第二电压源相连。
CN201210381737.3A 2012-10-10 2012-10-10 风扇控制电路 Expired - Fee Related CN103727047B (zh)

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TW101138150A TW201422118A (zh) 2012-10-10 2012-10-17 風扇控制電路
US13/891,177 US20140097781A1 (en) 2012-10-10 2013-05-09 Control circuit for fan

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CN104033411B (zh) * 2014-06-11 2016-01-13 广州三晶电气有限公司 一种风扇工作控制装置、方法及具有该控制装置的光伏逆变器
CN104314855A (zh) * 2014-10-30 2015-01-28 上海市静安区第一中心小学 热感应电风扇
CN104454612B (zh) * 2014-12-05 2016-08-24 深圳市创荣发电子有限公司 一种能够实现温度调节的风扇遥控器
CN104765392A (zh) * 2015-03-24 2015-07-08 中航华东光电有限公司 加热控制系统、液晶显示模块和加热控制方法
CN107605778A (zh) * 2017-07-24 2018-01-19 张家港市华为电子有限公司 一种用于为充电机降温的风扇的控制电路
CN109035738A (zh) * 2018-09-05 2018-12-18 武汉华和机电技术有限公司 一种高支模无线监测系统
CN108999809A (zh) * 2018-09-30 2018-12-14 广州鹏林照明灯具有限公司 一种风扇调速电路
CN109772837B (zh) * 2019-03-29 2024-05-14 山东方明药业集团股份有限公司 一种试剂瓶清洗装置
CN111949093B (zh) * 2019-05-15 2023-06-02 华为技术有限公司 一种风扇转速控制方法及电子设备
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