CN204003548U - A kind of fan control circuitry of temperature regulate speed - Google Patents
A kind of fan control circuitry of temperature regulate speed Download PDFInfo
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- CN204003548U CN204003548U CN201420369799.7U CN201420369799U CN204003548U CN 204003548 U CN204003548 U CN 204003548U CN 201420369799 U CN201420369799 U CN 201420369799U CN 204003548 U CN204003548 U CN 204003548U
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- 230000033228 biological regulation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
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Abstract
The utility model discloses a kind of fan control circuitry of temperature regulate speed, adopt a temperature sensing circuit to detect the temperature of fan Environmental Conditions, control a pulse-width regulated control circuit and produce pulse signal, by pulse signal control switch conversion alignment circuit, by switch change-over alignment circuit, control the time of connecting fan power supply, namely adopt a kind of pwm signal to control the time whether fan accesses power supply and access power supply, thereby control the wind speed of fan.The utility model is by utilizing the height of ambient temperature directly to control the wind speed of fan.This circuit structure is simple, with low cost, without technical difficulty easily realize, without MCU programming personnel, during design, can between a plurality of equipment, select single low-cost fan material to reduce handling of goods and materials difficulty, select identical low-cost circuit simple in structure to reduce design difficulty, at equipment fan in service, substantially in the state of closing down and low speed state, reach the object of energy-conservation, noise reduction, extension device whole service life.
Description
Technical field
The utility model relates to the fan control circuitry of temperature regulate speed.
Background technique
At present, a lot of consumers are because the power loss of generation in service causes device interior temperature to raise, for guaranteeing the reliable operation of equipment and for working life of extension device, will having required radiation fan to come to reduce temperature to equipment cooling.Existing common fan control circuitry has following several:
1, straight-through type, as Fig. 1, when device power, fan starts and works always, advantage be low without any control circuit, cost, easily realize, shortcoming is no matter whether device temperature Gao Bugao needs fan all to work always, and the noise that when increasing energy consumption, fan shortening in working life and fan rotate is very large.
2, setting temperature point unlatching fan, shown in Fig. 2, advantage is that peripheral circuit is less, cost is low, easily realizes, and closes down fan energy-saving and noise-reducing when temperature is not high, and shortcoming is that before fan is opened, device temperature is higher, the rear noise of fan unlatching is very large.
3, use the PWM speed-regulating fan of multilead to regulate rotation speed of the fan according to temperature curve, schematic diagram is as Fig. 3, advantage is that rotation speed of the fan flexible adjustment device temperature is low, fan noise is little, energy-conservation and can extend fan working life, shortcoming is MCU and the temperature sensing circuit that need to use the PWM speed-regulating fan of multilead and control use, cost is high, realize difficulty large, need MCU peopleware programming.
Above 3 kinds of situations also have a problem, need to choose the fan specification meeting with it or set according to the fan specification of selecting the power supply voltage conforming to fan specification according to power supply voltage, can form between a plurality of equipment and have different power supply voltages and different fan specifications, increase design difficulty and handling of goods and materials difficulty.
Model utility content
In order to overcome above-mentioned several all deficiencies of the prior art, the utility model provides a kind of fan control circuitry of temperature regulate speed, and this circuit is controlled the rotating speed of fan according to the ambient temperature of equipment.
The utility model solves the technological scheme that its technical problem adopts: adopt a temperature sensing circuit to detect the temperature of fan Environmental Conditions, control a pulse-width regulated control circuit and produce pulse signal, by pulse signal control switch conversion alignment circuit, by switch change-over alignment circuit, control the time of connecting fan power supply, namely adopt a kind of pwm signal to control the time whether fan accesses power supply and access power supply, thereby control the wind speed of fan.
The utility model is by utilizing the height of ambient temperature directly to control the wind speed of fan.This circuit structure is simple, with low cost, without technical difficulty easily realize, without MCU programming personnel, during design, can between a plurality of equipment, select single low-cost fan material to reduce handling of goods and materials difficulty, select identical low-cost circuit simple in structure to reduce design difficulty, at equipment fan in service, substantially in the state of closing down and low speed state, reach the object of energy-conservation, noise reduction, extension device whole service life.
Optimal way of the present utility model is as follows:
A fan control circuitry for temperature regulate speed, is arranged between the positive pole of the anodal and DC electrical source of the first pin of fan or between the second pin negative pole and direct current seedbed of fan; Comprise temperature sensing circuit, also comprise pulse-width regulated control circuit and switch change-over alignment circuit; Controlled the switching time of described switch change-over alignment circuit by the pulse signal of described pulse-width regulated control circuit output; Described switch change-over alignment circuit and described fan are connected between DC electrical source and ground; Described pulse-width regulated control circuit is connected with described temperature sensing circuit, and the dutycycle of the pulse signal of pulse-width regulated control circuit output is determined by the temperature of described temperature sensing circuit output.
Further, in the fan control circuitry of above-mentioned temperature regulate speed: described switch change-over alignment circuit comprises switching tube Q1, energy storage inductor L, sustained diode 1 and filtering energy storage capacitor C 7;
Described filtering energy storage capacitor C 7 is connected in parallel on the two ends of fan;
Described filtering energy storage capacitor C 7 is connected in parallel on the two ends of fan;
DC power anode connects the negative electrode of described sustained diode 1 and the first pin of fan is anodal, and the anode of sustained diode 1 is by the second pin negative pole of energy storage inductor L wind-receiving fan;
One end of switching tube Q1 is connected with the anode of described sustained diode 1, another termination power ground, and the control signal of switch Q1 is inputted the pulse-width regulated control circuit described in termination.
Further, in the fan control circuitry of above-mentioned temperature regulate speed: described pulse-width regulated control circuit comprises mode PWM controlled device U1; The feedback input signal of described mode PWM controlled device U1 internal electrical pressure ring is provided by described temperature sensing circuit.
Further, in the fan control circuitry of above-mentioned temperature regulate speed: described mode PWM controlled device U1 is UCX84X System on Chip/SoC, the reference voltage of the VREF pin output of described mode PWM controlled device U1 is 5.0V, between COMP pin and VFB pin, is provided with capacitor C in parallel 6 and resistance R 3; The output of temperature sensing circuit connects VFB pin, and VFB pin internal error amplifier benchmark is 2.5V.
Further, in the fan control circuitry of above-mentioned temperature regulate speed: described temperature sensing circuit comprises thermistor TR and divider resistance R2; Described thermistor TR and divider resistance R2 are connected between the reference voltage and ground of mode PWM controlled device U1, connect the inverting input of described mode PWM controlled device U1 internal electrical pressure ring between thermistor TR and divider resistance R2.
Further, in the fan control circuitry of above-mentioned temperature regulate speed: described thermistor RT is positive temperature coefficient thermistor, the reference voltage of thermistor RT mono-termination mode PWM controlled device U1, the other end connecting resistance R2, the other end ground connection of resistance R 2.
Further, in the fan control circuitry of above-mentioned temperature regulate speed: described thermistor RT is negative tempperature coefficient thermistor, the reference voltage of one termination mode PWM controlled device U1 of resistance R 2, another termination thermistor RT, the other end ground connection of thermistor RT.。
Further, in the fan control circuitry of above-mentioned temperature regulate speed: described switching tube Q1 is field effect transistor; The drain electrode of field effect transistor meets the anode A NODE of described fly-wheel diode, and source electrode connects power supply ground through current-limiting resistance R8, and grid connects described pulse-width regulated control circuit by current-limiting resistance R5, is provided with resistance R 7 between the grid-source electrode of described field effect transistor.
Further, in the fan control circuitry of above-mentioned temperature regulate speed: described switching tube Q1 is triode, the collector electrode of triode meets the anode A NODE of described fly-wheel diode, and emitter connects power supply ground through current-limiting resistance R8; Base stage connects described pulse-width regulated control circuit by current-limiting resistance R5, and shunt capacitance C8 on described current-limiting resistance R5, is provided with resistance R 7 between the base stage of triode and emitter.
The utility model provides a kind of fan control circuitry of the temperature regulate speed based on UCX84X.
Below with reference to drawings and Examples, the utility model is described in detail.
Accompanying drawing explanation
Fig. 1 is straight-through type fan circuit schematic diagram in prior art.
Fig. 2 is that in prior art, setting temperature point starts fan control circuitry schematic diagram.
Fig. 3 realizes the fan control circuitry schematic diagram of PWM speed governing with MCU in prior art.
Fig. 4 is theory diagram of the present utility model.
Fig. 5 is the fan control circuitry schematic diagram that the utility model embodiment 1 adopts positive coefficient temperature and resistance and metal-oxide-semiconductor switch.
Fig. 6 is the fan control circuitry schematic diagram that the utility model embodiment 2 adopts negative coefficient temperature and resistance and metal-oxide-semiconductor switch.
Fig. 7 is the fan control circuitry schematic diagram that the utility model embodiment 3 adopts positive coefficient temperature and resistance and triode switch.
Fig. 8 is the fan control circuitry schematic diagram that the utility model embodiment 4 adopts negative coefficient temperature and resistance and triode switch.
Fig. 9 is that the utility model embodiment 5 adopts positive coefficient temperature and resistance and metal-oxide-semiconductor switch to have the fan control circuitry schematic diagram of Voltage Feedback ring.
Figure 10 is that the utility model embodiment 6 adopts negative coefficient temperature and resistance and metal-oxide-semiconductor switch to have the fan control circuitry schematic diagram of Voltage Feedback ring.
Figure 11 is that the utility model embodiment 7 adopts positive coefficient temperature and resistance and triode switch to have the fan control circuitry schematic diagram of Voltage Feedback ring.
Figure 12 is that the utility model embodiment 8 adopts negative coefficient temperature and resistance and triode switch to have the fan control circuitry schematic diagram of Voltage Feedback ring.
Embodiment
As shown in Figure 4: the technological scheme that the utility model adopts is by after temperature sensing circuit detected temperatures, control the pulse signal of pulse-width regulated control circuit output, make-and-break time by this pulse signal control switch conversion alignment circuit, the time that final control fan switches on power, the dutycycle of this time by pwm signal determines, when PWM dutycycle hour, fan power-up time is less, wind speed is less, when pwm signal dutycycle maximum namely directly accesses power supply by fan two ends, the voltage adding is just the highest, and the wind speed of fan is maximum.
Embodiment 1, as shown in Figure 5, the present embodiment is that the fan of 12V specification is by the temperature regulate speed fan control circuitry of 12V direct current supply, what in this circuit, thermistor RT adopted is positive coefficient temperature and resistance, positive coefficient temperature and resistance and another resistance R 2 form a bleeder circuit, using the UCX84X System on Chip/SoC as mode PWM controlled device U1, after the reference potential of UCX84X (5V) dividing potential drop, access internal error amplifier (internal reference 2.5V) inverting input of UCX84X Voltage Feedback ring, UCX84X pulse-width regulated control circuit driver output connects the metal-oxide-semiconductor Q1 grid of switch change-over alignment circuit.The drain electrode termination power direction of metal-oxide-semiconductor Q1, source electrode termination power place to, between grid-source electrode, add resistance R 7, switch change-over alignment circuit comprises switching tube Q1, energy storage inductor L, sustained diode 1 and filtering energy storage capacitor C 7; Filtering energy storage capacitor C 7 is connected in parallel on the two ends of fan; DC power anode meets the negative electrode CATHODE of fly-wheel diode D1 and the first pin of fan is anodal, and the anode A NODE of sustained diode 1 is by the second pin negative pole of energy storage inductor L wind-receiving fan; One end of switching tube Q1 is connected with the anode (ANODE) of sustained diode 1, another termination power ground, and the control signal of switch Q1 is inputted the pulse-width regulated control circuit described in termination.
Equipment is in service, when temperature raises, it is large that temperature and resistance resistance becomes, internal error amplifier (internal reference 2.5V) the inverting input lower voltage of UCX84X Voltage Feedback ring, during lower than 2.5V, UCX84X pulse-width regulated control circuit starts to export the pulse drive signal driven MOS pipe of certain dutycycle and does switch running, by metal-oxide-semiconductor or triode Q1, energy storage inductor L, the switch change-over alignment circuit that sustained diode 1 and filtering energy storage capacitor C 7 form is started working and is exported a voltage accordingly lower with dutycycle, when this voltage reaches the driving voltage of fan, fan starts to slowly run, when temperature continues to raise, it is large that temperature and resistance resistance becomes again, the pulse drive signal dutycycle of UCX84X pulse-width regulated control circuit output becomes large, voltage raises, rotation speed of the fan raises, when temperature continues to raise, it is large that temperature and resistance resistance becomes again, the pulse drive signal dutycycle of UCX84X pulse-width regulated control circuit output becomes while approaching 100% greatly, voltage raises and approaches 12V, the full rotating speed of fan.
That the UCX84X series core using in the present embodiment mainly adopts is the UC3843 in the UC384X system being widely used at present in power circuit.
Embodiment 2, as shown in Figure 6: what the present embodiment was different from embodiment 1 above is, thermistor RT adopts negative coefficient temperature and resistance, when temperature raises, resistance diminishes, the pulse drive signal dutycycle of 284X pulse-width regulated control circuit output becomes large, voltage raises, rotation speed of the fan raises, when temperature continues to raise, temperature and resistance resistance diminishes again, and the pulse drive signal dutycycle of described UCX84X pulse-width regulated control circuit output becomes while approaching 100% greatly, voltage raises and approaches 12V, the full rotating speed of fan.
Embodiment 3, and shown in Fig. 7, the present embodiment is from embodiment 1 is different above, the triode that by-pass cock adopts, and in the driving resistance R 5 of transistor base, a capacitor C 8 in parallel is improved the switching characteristic of triode.
Embodiment 4, and shown in Fig. 8, the present embodiment is from embodiment 2 is different above, the triode that by-pass cock adopts, and in the driving resistance R 5 of transistor base, a capacitor C 8 in parallel is improved the switching characteristic of triode.
Embodiment 5, shown in Fig. 9, the present embodiment is applicable to power supply voltage higher than the situation of fan work voltage range, different from embodiment 1 is above, the pulse drive signal dutycycle of UCX84X pulse-width regulated control circuit output is redefined for the percent value of fan voltage and power supply voltage, and increased voltage feedback circuit, take above-mentioned two kinds of measures to control the output voltage stabilization of speed regulation circuit for fan at the load voltage value of fan.Feeder loop is for limiting the voltage of fan control circuitry fan jointing, make it equal the voltage feedback circuit of the operating voltage of fan, voltage feedback circuit is arranged between the first pin positive pole and the second pin negative pole of fan, comprises reference diode ZD2, triode Q2, resistance R 9, resistance R 10, resistance R 11; Resistance R 11 is connected between temperature sensing circuit output terminal and the collector electrode of triode Q2; The first pin of the emitter wind-receiving fan of triode Q2 is anodal, and the base stage of triode Q2, by the second pin negative pole of reference diode ZD2 wind-receiving fan, arranges resistance R 9 between the emitter of triode and base stage; Resistance R 10 is arranged between the base stage and reference diode ZD2 of triode Q2.
Embodiment 6, and shown in Figure 10, the present embodiment is from embodiment 5 is different above, and temperature and resistance adopts negative coefficient temperature and resistance.
Embodiment 7, and shown in Figure 11, the present embodiment is from embodiment 5 is different above, the triode that by-pass cock adopts, and on the driving resistance of transistor base, an electric capacity in parallel improves the switching characteristic of triode.
Embodiment 8, and shown in Figure 12, the present embodiment is from embodiment 6 is different above, the triode that by-pass cock adopts, and on the driving resistance of transistor base, an electric capacity in parallel improves the switching characteristic of triode.
Claims (10)
1. a fan control circuitry for temperature regulate speed, is arranged between the positive pole of the anodal and DC electrical source of the first pin of fan or between the second pin negative pole and direct current seedbed of fan; Comprise temperature sensing circuit, it is characterized in that: also comprise pulse-width regulated control circuit and switch change-over alignment circuit; Controlled the switching time of described switch change-over alignment circuit by the pulse signal of described pulse-width regulated control circuit output;
Described switch change-over alignment circuit and described fan are connected between DC electrical source and ground;
Described pulse-width regulated control circuit is connected with described temperature sensing circuit, and the dutycycle of the pulse signal of pulse-width regulated control circuit output is determined by the temperature of described temperature sensing circuit output.
2. the fan control circuitry of temperature regulate speed according to claim 1, is characterized in that: described switch change-over alignment circuit comprises switching tube Q1, energy storage inductor L, sustained diode 1 and filtering energy storage capacitor C 7;
Described filtering energy storage capacitor C 7 is connected in parallel on the two ends of fan;
DC power anode connects the negative electrode of described sustained diode 1 and the first pin of fan is anodal, and the anode of sustained diode 1 is by the second pin negative pole of energy storage inductor L wind-receiving fan;
One end of switching tube Q1 is connected with the anode of described sustained diode 1, another termination power ground, and the control signal of switch Q1 is inputted the pulse-width regulated control circuit described in termination.
3. the fan control circuitry of temperature regulate speed according to claim 2, is characterized in that: described pulse-width regulated control circuit comprises mode PWM controlled device U1; The feedback input signal of described mode PWM controlled device U1 internal current ring is provided by described temperature sensing circuit.
4. the fan control circuitry of temperature regulate speed according to claim 3, it is characterized in that: described mode PWM controlled device U1 is UCX84X System on Chip/SoC, the reference voltage of the VREF pin output of described mode PWM controlled device U1 is 5.0V, between COMP pin and VFB pin, is provided with capacitor C in parallel 6 and resistance R 3; The output of temperature sensing circuit connects VFB pin, and VFB pin internal error amplifier benchmark is 2.5V.
5. the fan control circuitry of temperature regulate speed according to claim 3, is characterized in that: described temperature sensing circuit comprises thermistor TR and divider resistance R2; Described thermistor TR and divider resistance R2 are connected between the reference voltage and ground of mode PWM controlled device U1, connect the inverting input of described mode PWM controlled device U1 internal electrical pressure ring between thermistor TR and divider resistance R2.
6. the fan control circuitry of temperature regulate speed according to claim 5, it is characterized in that: described thermistor RT is positive temperature coefficient thermistor, the reference voltage of thermistor RT mono-termination mode PWM controlled device U1, the other end connecting resistance R2, the other end ground connection of resistance R 2.
7. the fan control circuitry of temperature regulate speed according to claim 5, it is characterized in that: described thermistor RT is negative tempperature coefficient thermistor, the reference voltage of one termination mode PWM controlled device U1 of resistance R 2, another termination thermistor RT, the other end ground connection of thermistor RT.
8. according to the fan control circuitry of arbitrary described temperature regulate speed in claim 3 to 7, it is characterized in that: described switching tube Q1 is field effect transistor; The source electrode of field effect transistor connects the anode of described fly-wheel diode, and drain electrode connects power supply ground through current-limiting resistance R8, and grid connects described pulse-width regulated control circuit by current-limiting resistance R5, is provided with resistance R 7 between the grid-source electrode of described field effect transistor.
9. according to the fan control circuitry of arbitrary described temperature regulate speed in claim 3 to 7, it is characterized in that: described switching tube Q1 is triode, the collector electrode of triode connects the anode of described fly-wheel diode, and emitter connects power supply ground through current-limiting resistance R8; Base stage connects described pulse-width regulated control circuit by current-limiting resistance R5, and shunt capacitance C8 on described current-limiting resistance R5, is provided with resistance R 7 between the base stage of triode and emitter.
10. according to the fan control circuitry of arbitrary described temperature regulate speed in claim 3 to 7, it is characterized in that: also comprise that the voltage of restriction fan control circuitry fan jointing equals the voltage feedback circuit of the operating voltage of fan, described voltage feedback circuit is arranged between the first pin positive pole and the second pin negative pole of fan, comprises reference diode ZD2, triode Q2, resistance R 9, resistance R 10, resistance R 11;
Resistance R 11 is connected between temperature sensing circuit output terminal and the collector electrode of triode Q2; The first pin of the emitter wind-receiving fan of triode Q2 is anodal, and the base stage of triode Q2, by the second pin negative pole of reference diode ZD2 wind-receiving fan, arranges described resistance R 9 between the emitter of triode and base stage; Described resistance R 10 is arranged between the base stage and reference diode ZD2 of triode Q2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420369799.7U CN204003548U (en) | 2014-07-04 | 2014-07-04 | A kind of fan control circuitry of temperature regulate speed |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420369799.7U CN204003548U (en) | 2014-07-04 | 2014-07-04 | A kind of fan control circuitry of temperature regulate speed |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594732A (en) * | 2018-07-18 | 2018-09-28 | 龙城电装（常州）有限公司 | Single pin dual signal cooling fan controller and its control method |
| CN108583977A (en) * | 2018-06-28 | 2018-09-28 | 温州赤焰科技有限公司 | The instantaneously heated bundling device of direct current safe voltage and its transient heating control circuit |
| CN108594733A (en) * | 2018-07-18 | 2018-09-28 | 龙城电装（常州）有限公司 | Single pin multi signal cooling fan controller and its control method |
| CN109039051A (en) * | 2018-09-07 | 2018-12-18 | 大山科技有限公司 | A kind of power supply unit of cascade bus power supply |
| CN109917882A (en) * | 2019-03-07 | 2019-06-21 | 努比亚技术有限公司 | Heat dissipation device and terminal |
| CN111535915A (en) * | 2020-06-03 | 2020-08-14 | 龙城电装（常州）有限公司 | Control circuit for cooling fan controller |
| CN111963469A (en) * | 2019-05-20 | 2020-11-20 | 鸿富锦精密工业(武汉)有限公司 | Fan control circuit and electronic device |
| CN114641112A (en) * | 2022-05-17 | 2022-06-17 | 西蒙电气（中国）有限公司 | Circuit structure, method and device for realizing smooth dimming of output pulse width feedback based on power supply chopping, processor and storage medium thereof |
-
2014
- 2014-07-04 CN CN201420369799.7U patent/CN204003548U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108583977A (en) * | 2018-06-28 | 2018-09-28 | 温州赤焰科技有限公司 | The instantaneously heated bundling device of direct current safe voltage and its transient heating control circuit |
| CN108594732A (en) * | 2018-07-18 | 2018-09-28 | 龙城电装（常州）有限公司 | Single pin dual signal cooling fan controller and its control method |
| CN108594733A (en) * | 2018-07-18 | 2018-09-28 | 龙城电装（常州）有限公司 | Single pin multi signal cooling fan controller and its control method |
| CN109039051A (en) * | 2018-09-07 | 2018-12-18 | 大山科技有限公司 | A kind of power supply unit of cascade bus power supply |
| CN109039051B (en) * | 2018-09-07 | 2023-12-01 | 大山科技有限公司 | Cascade bus power supply's supplier |
| CN109917882A (en) * | 2019-03-07 | 2019-06-21 | 努比亚技术有限公司 | Heat dissipation device and terminal |
| CN109917882B (en) * | 2019-03-07 | 2022-05-13 | 努比亚技术有限公司 | Heat dissipation device and terminal |
| CN111963469A (en) * | 2019-05-20 | 2020-11-20 | 鸿富锦精密工业(武汉)有限公司 | Fan control circuit and electronic device |
| CN111535915A (en) * | 2020-06-03 | 2020-08-14 | 龙城电装（常州）有限公司 | Control circuit for cooling fan controller |
| CN114641112A (en) * | 2022-05-17 | 2022-06-17 | 西蒙电气（中国）有限公司 | Circuit structure, method and device for realizing smooth dimming of output pulse width feedback based on power supply chopping, processor and storage medium thereof |
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Address after: 518000 Floors 1-3 and 1-5 of Block A, Block B2, Jinweiyuan Industrial Plant, Longshan District, Pingshan New District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN GOLD POWER TECHNOLOGY Co.,Ltd. Address before: 518000 Shenzhen, Guangdong, Pingshan new industrial zone, poly dragon hill area Jinwei Industrial Zone A 1 floor. Patentee before: SHENZHEN GOLD POWER TECHNOLOGY Co.,Ltd. |
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Granted publication date: 20141210 |