CN203009348U - Fan speed control system based on thermistor design - Google Patents
Fan speed control system based on thermistor design Download PDFInfo
- Publication number
- CN203009348U CN203009348U CN 201220622886 CN201220622886U CN203009348U CN 203009348 U CN203009348 U CN 203009348U CN 201220622886 CN201220622886 CN 201220622886 CN 201220622886 U CN201220622886 U CN 201220622886U CN 203009348 U CN203009348 U CN 203009348U
- Authority
- CN
- China
- Prior art keywords
- fan
- pin
- temperature
- thermistor
- control chip
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The utility model discloses a fan speed control system based on the thermistor design, which comprises a control unit connected with a fan F, wherein a temperature sensing circuit for collecting the temperature of an IC (integrated circuit) is arranged on the control unit which adopts a control mechanism for regulating the rotational speed of the fan F according to the temperature of the IC; the control unit adopts a control chip provided with a system turn-off controller; the temperature sensing circuit and the fan F are connected to the control chip; and a power supply is further arranged on the control chip. The fan speed control system based on the thermistor design is reasonable in design, can realize a direct ratio relation between the rotational speed of the fan F and the temperature, provides guarantee for reducing the noise and the power consumption of the system, and meanwhile, the temperature sensing circuit has the advantages of simple circuit structure, good linear index, low cost and the like.
Description
Technical field
The utility model relates to the temperature detection field, specifically, is based on the fan Speed control system of thermistor design.
Background technique
Existing intergrated circuit (IC) semiconductor fabrication process that adopt more, make the components and parts such as many transistors and resistor, capacitor on a less monocrystalline silicon piece, and according to the method for multilayer wiring or tunnel wiring, components and parts are combined into complete electronic circuit.In the actual fabrication process, the IC artificer makes every effort to put into the transistor of more high speed operations in more and more less encapsulation, but this certainly will will cause heating, for these high powers IC circuit is put in less encapsulation, just must effectively solve heat management problems.In the practical application of a lot of IC circuit, often lower the temperature with fan, but in this simultaneously, the use of fan can bring mechanical failure, increase power consumption and noise, therefore, the utility model proposes a kind of fan Speed control system, can regulate according to temperature the speed of fan, thereby reduce the power consumption of fan.
The model utility content
The purpose of this utility model is to provide the fan Speed control system based on the thermistor design, adopt the temperature sense circuit to carry out Real-time Collection to the temperature in the IC circuit, and the relation that is directly proportional to temperature of the rotating speed that can realize fan F by control unit, reasonable in design, provide guarantee for reducing System noise and power consumption.
The utility model is achieved through the following technical solutions: based on the fan Speed control system of thermistor design, comprise the control unit that is connected with fan F, be provided with the temperature sense circuit that gathers the IC circuit temperature on described control unit, described control unit is the control mechanism for according to the IC circuit temperature, fan F rotating speed being regulated, in the utility model, the temperature sense circuit can gather the real time temperature of IC circuit, can realize the relation that the rotating speed of fan F is directly proportional to temperature by control unit, structure is very simple.
For better realizing the utility model, described control unit is to be provided with the control chip that controller turn-offs in system, described temperature sense circuit, fan F all are connected on control chip, also be provided with power supply on described control chip, in actual application, the temperature sense current acquisition to temperature analog signal be sent on control chip, control chip can adopt TC642, it can pass through pulse modulation technology (PWM) realization to the control of fan speed, and turn-off controller by system and fan F is set when the minimum speed, close down fan F, reduce its energy consumption.
The structure of temperature sense circuit is as follows: described temperature sense circuit is the bleeder circuit that is comprised of thermistor RT, resistance R 1, resistance R 2, be provided with Vin pin, VDD pin on described control chip, described temperature sense circuit is connected on control chip by Vin pin, VDD pin, thermistor RT is the nonlinear device with negative temperature coefficient, during use, thermistor RT and resistance R 1 form shunt resistor Rtemp, R1 is used for realizing the linearization of thermistor RT temperature response, and R2 is used in Vin pin place's generation positive temperature coefficient.
For better realizing the utility model, be provided with Vout pin, SENSE pin on described control chip, described fan F is connected with control chip by Vout pin, SENSE pin.
In the utility model, it is the control module that is provided with fan F low temperature shutdown mode that controller turn-offs in described system, also be provided with Vmin pin, CF pin on described control chip, described system turn-offs controller and is connected with control chip by Vmin pin, CF pin.
For better fan F being controlled, the resistance of described thermistor RT, resistance R 1, resistance R 2 is respectively 100k Ω, 100 k Ω, 23.2 k Ω, when the input control voltage scope of Vin pin was 1.25V to 2.65V, corresponding temperature range was 0 ℃ to 50 ℃.
The utility model compared with prior art has the following advantages and beneficial effect:
(1) the utility model is reasonable in design, adopt the temperature sense circuit to carry out Real-time Collection to the temperature in the IC circuit, and the relation that is directly proportional to temperature of the rotating speed that can realize fan F by control unit, reasonable in design, provide guarantee for reducing System noise and power consumption.
(2) temperature sense circuit described in the utility model adopts the bleeder circuit that thermistor RT is made, and circuit structure is simple, and linearized index is good, and it is with low cost.
(3) in the utility model, it is the control module that is provided with fan F low temperature shutdown mode that controller turn-offs in system, can set the minimum speed of fan F by the Vmin pin, reduces the energy consumption of fan F, energy-conserving and environment-protective.
Description of drawings
Fig. 1 is theory diagram of the present utility model.
Fig. 2 is electrical block diagram of the present utility model.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but mode of execution of the present utility model is not limited to this.
Embodiment:
The utility model proposes the fan Speed control system based on the thermistor design, as shown in Figure 1, mainly formed by fan F and the control unit that is connected with fan F, be provided with the temperature sense circuit that gathers the IC circuit temperature on control unit, in the utility model, control unit is the control mechanism for according to the IC circuit temperature, fan F rotating speed being regulated, during use, the temperature sense circuit can gather the real time temperature of IC circuit, and the relation that is directly proportional to temperature of the rotating speed that can realize fan F by control unit, structure is very simple.
As shown in Figure 1, control unit is to be provided with the control chip that controller turn-offs in system, and temperature sense circuit, fan F are connected on control chip, also are provided with power supply on control chip.In actual application, the temperature sense current acquisition to temperature analog signal be sent on control chip, control chip can adopt on TC642, realizes control to fan speed by pulse modulation technology (PWM); And system to turn-off controller be the control module that is provided with fan F low temperature shutdown mode, and turn-off controller by system and fan F be set when the minimum speed, close down fan F, reduce its energy consumption.
Fig. 2 is electrical block diagram of the present utility model, as shown in Figure 2:
(1) temperature sense circuit: be the bleeder circuit that is comprised of thermistor RT, resistance R 1, resistance R 2, be provided with Vin pin, VDD pin on control chip TC642, the temperature sense circuit is connected on control chip by Vin pin, VDD pin.In its structure, thermistor RT is the nonlinear device with negative temperature coefficient, and during use, thermistor RT and resistance R 1 form shunt resistor Rtemp, R1 is used for realizing the linearization of thermistor RT temperature response, and R2 is used in Vin pin place's generation positive temperature coefficient.Certainly, for better fan F being controlled, the resistance of thermistor RT, resistance R 1, resistance R 2 is respectively 100k Ω, 100 k Ω, 23.2 k Ω, and when the input control voltage scope of Vin pin was 1.25V to 2.65V, corresponding temperature range was 0 ℃ to 50 ℃.
(2) fan F: be provided with Vout pin, SENSE pin on control chip, fan F is connected with control chip by Vout pin, SENSE pin, wherein, the Vout pin is mainly the low-cost transistor for drive system base power switch component (that is: fan F), in the actual fabrication process, can adopt driving transistors Q1 to be optimized.
(3) controller turn-offs in system: also be provided with Vmin pin, CF pin on control chip, system turn-offs controller and is connected with control chip by Vmin pin, CF pin.
The utility model is reasonable in design, can realize the relation that the rotating speed of fan F is directly proportional to temperature, provides guarantee for reducing System noise and power consumption, and simultaneously, the temperature sense circuit also has the advantages such as circuit structure is simple, linearized index is good, with low cost.
The above; it is only preferred embodiment of the present utility model; be not that the utility model is done any pro forma restriction, any simple modification, equivalent variations that every foundation technical spirit of the present utility model is done above embodiment are within all falling into protection domain of the present utility model.
Claims (6)
1. the fan Speed control system that designs based on thermistor, it is characterized in that: comprise the control unit that is connected with fan F, be provided with the temperature sense circuit that gathers the IC circuit temperature on described control unit, described control unit is the control mechanism for according to the IC circuit temperature, fan F rotating speed being regulated.
2. the fan Speed control system based on thermistor design according to claim 1, it is characterized in that: described control unit is to be provided with the control chip that controller turn-offs in system, described temperature sense circuit, fan F all are connected on control chip, also are provided with power supply on described control chip.
3. the fan Speed control system based on thermistor design according to claim 2, it is characterized in that: the bleeder circuit of described temperature sense circuit for being formed by thermistor RT, resistance R 1, resistance R 2, be provided with Vin pin, VDD pin on described control chip, described temperature sense circuit is connected on control chip by Vin pin, VDD pin.
4. the described fan Speed control system based on thermistor design of according to claim 2～3 any one, it is characterized in that: be provided with Vout pin, SENSE pin on described control chip, described fan F is connected with control chip by Vout pin, SENSE pin.
5. the fan Speed control system based on thermistor design according to claim 4, it is characterized in that: it is the control module that is provided with fan F low temperature shutdown mode that controller turn-offs in described system, also be provided with Vmin pin, CF pin on described control chip, described system turn-offs controller and is connected with control chip by Vmin pin, CF pin.
6. the fan Speed control system based on thermistor design according to claim 5, it is characterized in that: the resistance of described thermistor RT, resistance R 1, resistance R 2 is respectively 100k Ω, 100 k Ω, 23.2 k Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220622886 CN203009348U (en) | 2012-11-22 | 2012-11-22 | Fan speed control system based on thermistor design |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220622886 CN203009348U (en) | 2012-11-22 | 2012-11-22 | Fan speed control system based on thermistor design |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203009348U true CN203009348U (en) | 2013-06-19 |
Family
ID=48600946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220622886 Expired - Fee Related CN203009348U (en) | 2012-11-22 | 2012-11-22 | Fan speed control system based on thermistor design |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203009348U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465027A (en) * | 2015-12-31 | 2016-04-06 | 苏州壹达生物科技有限公司 | Device for intelligently controlling linear rotating speed of heat radiating fan |
| CN107605778A (en) * | 2017-07-24 | 2018-01-19 | 张家港市华为电子有限公司 | A kind of control circuit for being used for the fan for charger cooling |
-
2012
- 2012-11-22 CN CN 201220622886 patent/CN203009348U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465027A (en) * | 2015-12-31 | 2016-04-06 | 苏州壹达生物科技有限公司 | Device for intelligently controlling linear rotating speed of heat radiating fan |
| CN105465027B (en) * | 2015-12-31 | 2020-12-29 | 苏州壹达生物科技有限公司 | Device for intelligently controlling linear rotating speed of cooling fan |
| CN107605778A (en) * | 2017-07-24 | 2018-01-19 | 张家港市华为电子有限公司 | A kind of control circuit for being used for the fan for charger cooling |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103775366B (en) | Power source temperature sampling and fan control circuitry and supply unit | |
| CN203009348U (en) | Fan speed control system based on thermistor design | |
| CN206557626U (en) | A kind of smart electronicses temperature controller | |
| CN203673427U (en) | Cooling fan intelligent control system applied to PC-BASED automation equipment | |
| CN206072476U (en) | A kind of valve control device adjusted for fluid flow | |
| CN202383594U (en) | Singlechip reset circuit | |
| CN203377513U (en) | Frequency conversion control cabinet automatically adjusting temperature | |
| CN201623678U (en) | Automatic speed regulating device of radiating fan based on single chip microcomputer PWM | |
| CN206099304U (en) | Be applied to excess temperature protection circuit of thick film hybrid integrated technology | |
| CN202926683U (en) | Power supply temperature sampling and fan controlling circuit and power supply device | |
| CN204707024U (en) | A kind of small-power intelligent object | |
| CN203009345U (en) | Fan speed control system based on switching mode | |
| CN204651893U (en) | A kind of CMOS thermal-shutdown circuit | |
| CN209201040U (en) | A kind of switch driving circuit, controller and electronic equipment | |
| CN204349436U (en) | A kind of IGBT temperature for STATCOM detects and protective circuit | |
| CN204089154U (en) | The overvoltage crowbar of a kind of ultra-high-tension power transmission line ground wire power taking | |
| CN206611593U (en) | A kind of automatic controller for temperature | |
| CN202612162U (en) | Power-type fan rotational speed control circuit and fan device | |
| CN202157861U (en) | Cooling device for automobile engine | |
| CN204730951U (en) | A kind of transformer overtemperature alarm | |
| CN203009343U (en) | Fan speed control system based on SCM (Single Chip Microcomputer) design | |
| CN207636967U (en) | A kind of middle frequency furnace series-connection power supplies control system | |
| CN206314010U (en) | A kind of electronic equipment and its single-chip microcomputer heater circuit | |
| CN204517448U (en) | aircraft battery controller | |
| CN205986603U (en) | Single power driving circuit of unmanned aerial vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20131122 |