CN101446295A - Method for controlling cooling fan of electronic element and device thereof - Google Patents
Method for controlling cooling fan of electronic element and device thereof Download PDFInfo
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- CN101446295A CN101446295A CNA2007101934850A CN200710193485A CN101446295A CN 101446295 A CN101446295 A CN 101446295A CN A2007101934850 A CNA2007101934850 A CN A2007101934850A CN 200710193485 A CN200710193485 A CN 200710193485A CN 101446295 A CN101446295 A CN 101446295A
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Abstract
The invention relates to a method for controlling a cooling fan of an electronic element and a device thereof. The control method comprises the steps as follows: (a) the temperature of the electronic element is detected for outputting a first control signal; (b) load current of the electronic element is received and is transformed into a second control signal; and (c) the first control signal and the second control signal are referred for regulating and controlling the rotate speed of the cooling fan. The method for controlling the cooling fan of the electronic element and the device thereof detect the load current of the electronic element, transform the load current into the control signal to be used as the operation basis of the cooling fan and are matched with the existing temperature-control circuit, thereby being capable of achieving optimal cooling effect.
Description
Technical field
The present invention is meant a kind of control method of cooling fan and device of electronic component especially relevant for a kind of control method for fan and device.
Background technique
Consult Fig. 1, owing to tend to produce a large amount of heat energy during electronic component work, therefore need suitably cooling to make the stable work of electronic component energy, a kind of central processing unit (CPU) cooling device 9 that adopts with present computer system is that example illustrates, it comprises a fan governor 91 and a radiation fan 92, mainly be to be used for to central processing unit (CPU) 90 coolings, this fan governor 91 has an arithmetic element 911 and a rotary speed controling unit 912.
The radiating principle of this central processing unit (CPU) cooling device 9 is: the arithmetic element 911 that central processing unit (CPU) 90 outputs one temperature sensor signal 901 is given fan governor 91, arithmetic element 911 detects the present temperature of central processing unit (CPU) 90 by temperature sensor signal 901, arithmetic element 911 is utilized the rotating speed of these rotary speed controling unit 912 outputs one drive signal 902 control radiation fans 92 of built-in algorithm order then, when temperature is too high, the rotating speed that orders about radiation fan 92 increases, when temperature stabilization, the rotating speed that orders about radiation fan 92 slows down; Simultaneously, radiation fan 92 also can be exported a feedback signal 903 and give arithmetic element 911, and thus, how arithmetic element 911 just can order about the stable air-flow of radiation fan 92 generations according to feedback signal 903 calculating is progressively lowered the temperature by central processing unit (CPU) 90.
Yet, existing method all is to have produced under the state of heat energy at central processing unit (CPU) 90, for its heat production result, just temperature is carried out calculation process, can't know but how much heat energy is system may produce by inference and fan is controlled avoided the overheated situation of electronic component to take place in advance.
Summary of the invention
Because electric current is proportional to power, power is proportional to the heat energy of generation again, therefore, detects electric current and can reach the following issuable heat energy of precognition.
Therefore, purpose of the present invention is promptly providing a kind of control method of cooling fan and device that utilizes the electronic component of load current control radiation fan running.
So the control method of cooling fan of electronic component of the present invention comprises following step: (a) detect this temperature of electronic component to export one first control signal; (b) receive the load current of this electronic component, and be converted into one second control signal; And (c) with reference to this first control signal and this second control signal to regulate and control the rotating speed of this radiation fan.
The radiation fan control gear of electronic component of the present invention comprises a current detection module, a temperature-control circuit and a logic circuit unit.
This current detection module is in order to detect a load current of this electronic component; This temperature-control circuit is in order to detect this temperature of electronic component to export one first control signal; This logic circuit unit has the controller that a pulse generating circuit and that couples this current detection module couples this pulse generating circuit and this temperature-control circuit, this pulse generating circuit is in order to receive this load current of this current detection module, and be converted into one second control signal, this controller in order to receive and with reference to this first control signal and this second control signal to regulate and control the rotating speed of this radiation fan.
Because the control method of cooling fan of electronic component of the present invention and device are to adopt the load current that detects this electronic component, and load current is converted to is used as radiation fan running foundation after the control signal, and cooperate existing temperature-control circuit, therefore can reach best heat radiation function.
Description of drawings
Fig. 1 is a system block diagrams, and a kind of central processing unit (CPU) cooling device that present computer system adopts is described;
Fig. 2 is a flow chart, and the preferred embodiment of the control method of cooling fan of electronic component of the present invention is described;
Fig. 3 is a system block diagrams, and the preferred embodiment of the radiation fan control gear of electronic component of the present invention is described; And
Fig. 4 is a circuit block diagram, the element that the pulse generating circuit of explanatory drawing 3 has.
The primary component symbol description
Known
9 fan for cooling devices
90 central processing unit (CPU)s
901 temperature sensor signals
902 drive signals
903 feedback signals
91 fan governors
911 arithmetic elements
912 rotary speed controling units
92 radiation fans
The present invention
1 radiation fan control gear
10 central processing unit (CPU)s
101 power supply signals
102 load currents
103 temperature sensor signals
104 amplifying signals
106 pulse signals
111 current detection modules
112 voltage stabilizers
12 temperature-control circuits
13 logic circuit units
131 pulse generating circuits
132 controllers
141 amplifiers
142 voltage controlled oscillators
143 level displacement shifters
2 radiation fans
201 first control signals
202 second control signals
203 control signals
The 501-503 step
Embodiment
About aforementioned and other technology contents, characteristics and effect of the present invention, in the detailed description of following cooperation preferred embodiment with reference to the accompanying drawings, can clearly present.
The principle of the control method of cooling fan of electronic component of the present invention is that the load current of electronic component is proportional to power, power is proportional to the heat energy of generation again, therefore, working load electric current forerunner's signal of being used as control radiation fan running can have the effect of control in advance.
Consult Fig. 2, the preferred embodiment of the control method of cooling fan of electronic component of the present invention is that the temperature of detected electrons element is to export one first control signal (step 501), and receive the load current of this electronic component, and be converted into one second control signal (step 502), at last, reference first control signal and second control signal are regulated and control the rotating speed (step 503) of radiation fan.
Consult Fig. 3, a preferred embodiment of the radiation fan control gear 1 of electronic component of the present invention is applied in the existing computer system, cooperates an existing radiation fan 2, a central processing unit (CPU) 10 and a voltage stabilizer (Voltage regulate modulator; VRM) 112, and comprise a current detection module 111, a temperature-control circuit 12 and a logic circuit unit 13.
In this preferred embodiment, radiation fan control gear 1 is to be used for controlling the rotating speed of this radiation fan 2 so that central processing unit (CPU) 10 is lowered the temperature; In addition,, yet be easy to generate heat energy when also being applicable to work and need the electronic component of heat radiation, many groups electronic component of high speed operation, do not exceed with one group of central processing unit (CPU) 10 though this example is to illustrate with central processing unit (CPU) 10.
Central processing unit (CPU) 10 is by voltage stabilizer 112 power supplies, this voltage stabilizer 112 is external power supply to be converted to a power supply signal 101 give central processing unit (CPU) 10 and current detection module 111, and current detection module 111 is to detect a load current 102 of supplying with central processing unit (CPU) 10 in the power supply signal 101, the effect of this preferred embodiment is to take forerunner's signal that this load current 102 is used as 2 runnings of control radiation fan, reason is that the load current 102 and the voltage of power supply signal 101 are the directly proportional relation, load current 102 is proportional to power again, power is proportional to the heat energy of generation again, therefore, working load electric current 102 forerunner's signal of being used as the running of control radiation fan 2 can have the effect of control in advance.
Central processing unit (CPU) 10 provides a temperature sensor signal 103 to temperature- control circuit 12,12 of temperature-control circuits converse the suitable operation cycle (Duty Cycle) according to temperature sensor signal 103 and produce one first control signal 201 gives logic circuit unit 13, the width of this operation cycle can further be controlled the rotating speed of radiation fan 2, for example: when wider width, then rotating speed accelerates, when width was narrower, then rotating speed slowed down.
Logic circuit unit 13 has the controller 132 that a pulse generating circuit 131 and that couples current detection module 111 couples pulse generating circuit 131, temperature-control circuit 12 and radiation fan 2.
Consult Fig. 3 and Fig. 4, this pulse generating circuit 131 is in order to the load current 102 of received current testing module 111, and is converted into one second control signal 202 and gives this controller 132; Pulse generating circuit 131 comprises an amplifier 141, one voltage controlled oscillator (VCO) 142 and a level displacement shifter 143, amplifier 141 is converted to an amplifying signal 104 with load current 102, voltage controlled oscillator 142 is converted to a pulse signal 106 with this amplifying signal 104, its transfer principle is the pulse signal 106 that is converted to different in width according to the Different Slope of amplifying signal 104,143 of level displacement shifters are that output second control signal 202 in the level shift of pulse signal 106 (Level shift) back is given controller 132, the purpose of pulse signal 106 level shifts is to be converted to controller 132 acceptable level, and then orders about controller 132 actions.
Wherein, the control logic of controller 132 is to regulate and control the rotating speed of this radiation fan 2 with reference to the pulse width of first control signal 201 and second control signal 202, for example: when controller 132 judges that first control signals 201 and 202 the two the wherein arbitrary pulse of second control signal have big width, promptly express possibility is that temperature overheating or element power consumption increase, therefore export the bigger control signal of this pulse width 203 and give the foundation of radiation fan 2 as the control rotating speed, yet, this control mode only is a kind of explanation of implementation type, those skilled in the art also can introduce second control signal 202 but change into the control logic of different algorithms, are not restriction with aforementioned implementation type therefore.
Conclude above-mentioned, because the control method of cooling fan of electronic component of the present invention and device are to adopt the load current that detects this electronic component, and load current is converted to is used as radiation fan running foundation after the control signal, and cooperate existing temperature-control circuit, therefore can reach best heat radiation function.
Though the present invention with preferred embodiment openly as above, so it is not in order to limit the present invention.Those of ordinary skill under any in the technical field under the situation that does not break away from the spirit and scope of the present invention, can carry out various changes and modification.Therefore, protection scope of the present invention is as the criterion with the scope of the claim that proposed.
Claims (5)
1. the control method of cooling fan of an electronic component comprises following step:
(a) detect this temperature of electronic component to export one first control signal;
(b) receive the load current of this electronic component, and be converted into one second control signal; And
(c) with reference to this first control signal and this second control signal to regulate and control the rotating speed of this radiation fan.
2. according to the control method of cooling fan of the described electronic component of claim 1, wherein, step (c) is to regulate and control the rotating speed of this radiation fan with reference to a pulse width of this first control signal and this second control signal, when judging that this first control signal and the two the wherein arbitrary pulse of this second control signal have big width, promptly export the bigger control signal of this pulse width and give the foundation of this radiation fan as the control rotating speed.
3. the radiation fan control gear of an electronic component comprises:
One current detection module is in order to detect a load current of this electronic component;
One temperature-control circuit is in order to detect this temperature of electronic component to export one first control signal; And
One logic circuit unit, have a pulse generating circuit and that couples this current detection module and couple the controller of this pulse generating circuit and this temperature-control circuit, this pulse generating circuit is in order to receive this load current of this current detection module, and be converted into one second control signal, this controller in order to receive and with reference to this first control signal and this second control signal to regulate and control the rotating speed of this radiation fan.
4. according to the radiation fan control gear of the described electronic component of claim 3, wherein, this controller is regulated and control the rotating speed of this radiation fan with reference to a pulse width of this first control signal and this second control signal.
5. according to the radiation fan control gear of the described electronic component of claim 3, wherein, this pulse generating circuit comprises an amplifier, a voltage controlled oscillator and a level displacement shifter, this amplifier is converted to an amplifying signal with this load current, this voltage controlled oscillator is converted to a pulse signal with this amplifying signal, this level displacement shifter with the level shift of this pulse signal after output this second control signal give this controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101934850A CN101446295A (en) | 2007-11-27 | 2007-11-27 | Method for controlling cooling fan of electronic element and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101934850A CN101446295A (en) | 2007-11-27 | 2007-11-27 | Method for controlling cooling fan of electronic element and device thereof |
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| CN101446295A true CN101446295A (en) | 2009-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2007101934850A Pending CN101446295A (en) | 2007-11-27 | 2007-11-27 | Method for controlling cooling fan of electronic element and device thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454621A (en) * | 2010-10-21 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Fan control circuit |
| CN102454618A (en) * | 2010-10-19 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Fan control system and method |
| CN103821747A (en) * | 2012-11-19 | 2014-05-28 | 纬创资通股份有限公司 | Fan control system, computer system and fan control method thereof |
| CN107084148A (en) * | 2017-07-02 | 2017-08-22 | 郑州云海信息技术有限公司 | A kind of fan control device, system and method |
| CN107291123A (en) * | 2016-03-31 | 2017-10-24 | 技嘉科技股份有限公司 | The start method and radiating electronic system of radiating control device |
| WO2018033075A1 (en) * | 2016-08-18 | 2018-02-22 | Huawei Technologies Co., Ltd. | Proactive fan speed adjustment |
| CN109826819A (en) * | 2019-02-28 | 2019-05-31 | 苏州浪潮智能科技有限公司 | A kind of system and method adjusting rotation speed of the fan |
| TWI698082B (en) * | 2020-04-01 | 2020-07-01 | 保銳科技股份有限公司 | Fan control circuit with temperature compensation and method of fan control the same |
| WO2020177138A1 (en) * | 2019-03-06 | 2020-09-10 | 郑州云海信息技术有限公司 | Fan speed regulation method and apparatus, and electronic device |
| CN113494467A (en) * | 2020-04-07 | 2021-10-12 | 保锐科技股份有限公司 | Fan control circuit with temperature compensation and fan control method thereof |
-
2007
- 2007-11-27 CN CNA2007101934850A patent/CN101446295A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454618A (en) * | 2010-10-19 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Fan control system and method |
| CN102454621A (en) * | 2010-10-21 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Fan control circuit |
| CN103821747A (en) * | 2012-11-19 | 2014-05-28 | 纬创资通股份有限公司 | Fan control system, computer system and fan control method thereof |
| CN103821747B (en) * | 2012-11-19 | 2016-07-20 | 纬创资通股份有限公司 | Fan control system, computer system and fan control method thereof |
| US10114390B2 (en) | 2012-11-19 | 2018-10-30 | Wistron Corporation | Fan control system, computer system, and fan controlling method thereof |
| CN107291123A (en) * | 2016-03-31 | 2017-10-24 | 技嘉科技股份有限公司 | The start method and radiating electronic system of radiating control device |
| WO2018033075A1 (en) * | 2016-08-18 | 2018-02-22 | Huawei Technologies Co., Ltd. | Proactive fan speed adjustment |
| CN107084148A (en) * | 2017-07-02 | 2017-08-22 | 郑州云海信息技术有限公司 | A kind of fan control device, system and method |
| CN109826819A (en) * | 2019-02-28 | 2019-05-31 | 苏州浪潮智能科技有限公司 | A kind of system and method adjusting rotation speed of the fan |
| WO2020177138A1 (en) * | 2019-03-06 | 2020-09-10 | 郑州云海信息技术有限公司 | Fan speed regulation method and apparatus, and electronic device |
| TWI698082B (en) * | 2020-04-01 | 2020-07-01 | 保銳科技股份有限公司 | Fan control circuit with temperature compensation and method of fan control the same |
| CN113494467A (en) * | 2020-04-07 | 2021-10-12 | 保锐科技股份有限公司 | Fan control circuit with temperature compensation and fan control method thereof |
| CN113494467B (en) * | 2020-04-07 | 2023-09-12 | 保锐科技股份有限公司 | Fan control circuit with temperature compensation and fan control method thereof |
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Open date: 20090603 |