CN206309628U - A kind of alignment circuit of UPS DC radiation fans - Google Patents
A kind of alignment circuit of UPS DC radiation fans Download PDFInfo
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- CN206309628U CN206309628U CN201621314567.7U CN201621314567U CN206309628U CN 206309628 U CN206309628 U CN 206309628U CN 201621314567 U CN201621314567 U CN 201621314567U CN 206309628 U CN206309628 U CN 206309628U
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Abstract
The alignment circuit of a kind of UPS DC radiation fans of the present utility model, it is characterised in that including fan, the BUCK reduction voltage circuits connected with the fan, the switch tube driving circuit for driving the BUCK reduction voltage circuits；The utility model compared with prior art its be advantageous in that：System controls the rotating speed of fan according to radiator temperature, realizes the control to temperature of power module, more fast intelligent, fan is not operated under full speed mode of operation constantly, not only increase the life-span of fan, reduce noise, and from alignment circuit itself, its main circuit it is simple, it is necessary to power device it is few, speed-regulating range width, fast response time, the UPS that suitable load is changed greatly, switching frequency is high, harmonic wave is few, influences smaller to circuit, very useful.
Description
Technical field
The utility model is related to the heat dissipation technology of power circuit application field and electrical equipment, more particularly to a kind of UPS to use
The alignment circuit of DC radiation fan.
Background technology
Responsibility of the DC fan in air-cooled radiator be:By the guide functions of itself, make air with certain speed,
Certain mode takes away the heat piled up thereon using the heat exchange between air and fin, so as to realize by fin
The radiating mode of " forced convertion ".
Rotation speed of the fan is faster, and radiating effect is better.Ups system in the case of different loads, also can by the temperature of its switching tube
Difference, in order to extend my service life of radiator fan while avoiding loading as a child unnecessary energy loss, it is necessary to use
Speed regulation circuit for fan reduces rotation speed of the fan；When system band load is larger, it is necessary to increase rotation speed of the fan to improve heat-sinking capability, from
And improve air cooling effect.
At present, mostly all without speed governing, this can cause the life problems and noise of fan long-play to DC fan
Problem, or the linear power supply regulating circuit built using triode carries out speed governing to fan, and circuit is simple, but power consumption is very
Greatly, because a part of power consumption needs consumption on triode, the service life of triode has been had a strong impact on, has been unfavorable for the length of machine
Time is run, and existing technology carries out fan speed control often through temperature feedback, and response is relatively slow, is transported for part electrical equipment
Row is unfavorable, it is seen then that prior art is still present more or less deficiency.
Utility model content
The purpose of this utility model is to provide a kind of alignment circuit of UPS DC radiation fans, by pulsewidth modulation
（PWM）Mode, changes the output voltage of BUCK circuits to carry out speed governing to fan, in order to ensure when UPS normally runs, system
The rotating speed of radiator fan can be controlled according to machine bringing onto load situation, so as to improve heat-sinking capability, reduce switching tube temperature；This
Utility model provides a kind of speed regulation circuit for fan based on BUCK, and the circuit can adjust output voltage by changing dutycycle,
So as to the radiator fan rotary speed of four parallel connections of real-time control, to change air-cooled control ability.
To achieve these goals, the technical solution of the utility model is as follows：A kind of speed governing of UPS DC radiation fans
Circuit, it is characterised in that including fan, the BUCK reduction voltage circuits connected with the fan, for driving the BUCK reduction voltage circuits
Switch tube driving circuit；
The switch tube driving circuit is connected to resistance R1 including DSP output duty cycle signals, the other end of resistance R1 with
Resistance R2 be connected as a little and with the base stage of triode Q1（b1）It is connected, the other end of R2 is connected to LGND, triode Q1's
Emitter stage（e1）It is connected with LGND, resistance R3~R6 and+12V and LGND composition bleeder circuits, the colelctor electrode of Q1（c1）With R5,
The common port of R3 is connected, and the other end and the R6 of resistance R5 are connected as a little and are connected to 12V, and the common port of R3, R4 is connected
For any and with the grid of MOSFET pipes Q2（g2）Connection, the other end of R4 and the source electrode of MOSFET pipes Q2（s2）It is connected as a bit
And be connected with LGND, triode（Q3）, triode（Q4）Base stage be connected as a little and be connected with the other end of resistance R6,
NPN triode（Q3）Colelctor electrode（c3）It is connected to+12V, NPN triode（Q3）Emitter stage（e3）And PNP triode（Q4）
Colelctor electrode（c4）It is connected as a little and be connected with resistance R7, the other end of resistance R7 and the grid of the enhanced MOSFET of N-channel
（g5）It is connected；PNP triode（Q4）Colelctor electrode（e4）It is connected with the ground of power supply；
The BUCK reduction voltage circuits, are connected to a bit by the grid of the N-channel MOS FET pipes Q5 and one end of resistance R8
And be connected with described drive circuit output drive signal, MOSFET pipes（Q5）Source collection（S5）With fly-wheel diode（Q6）'s
Negative electrode is connected as a little and is connected with inductance L1, the other end of L1 and one end of polarity free capacitor C1 be connected as a little and with electricity
The positive pole connection of solution electric capacity C2, the negative pole of electrochemical capacitor C2 is connected as any and and LGND with the other end of polarity free capacitor C1
It is connected, diode（Q6）Anode be connected with LGND.
The utility model compared with prior art its be advantageous in that：System controls turning for fan according to radiator temperature
Speed, more control of the realization to temperature of power module, fast intelligent, makes fan need not constantly be operated in full speed mode of operation
Under, not only increase the life-span of fan, reduce noise, and from alignment circuit itself, its main circuit it is simple, it is necessary to work(
Rate device is few, speed-regulating range width, fast response time, and the UPS that suitable load is changed greatly, switching frequency is high, and harmonic wave is few, to circuit
Influence is smaller, very useful.
Brief description of the drawings
Fig. 1 is fan speed regulation system block diagram of the present utility model；
Fig. 2 is switch tube driving circuit of the present utility model；
Fig. 3 is BUCK reduction voltage circuits of the present utility model.
Specific embodiment
To make have a better understanding and awareness to architectural feature of the present utility model and the effect reached, to compared with
Good embodiment and accompanying drawing coordinate detailed description, are described as follows：
Fig. 1 show the fan speed regulation system block diagram of the present embodiment offer, and central processing unit reads from output detection unit
Machine bringing onto load situation, different dutycycles are exported to drive circuit according to different loads, and drive circuit output has driving
The duty cycle signals of ability are to regulating circuit, the corresponding VD of regulating circuit final output, the speed of DC fan
Change with the change of supply voltage, eventually affect the temperature change of power section radiator, whole governing system is complete
Fan is controlled according to machine loading situation, overcome response speed that temperature control exists in itself it is slow the drawbacks of.
As shown in Figure 2,3, the alignment circuit of a kind of UPS DC radiation fans of the present embodiment, it is characterised in that including
Fan, the BUCK reduction voltage circuits connected with the fan, the switch tube driving circuit for driving the BUCK reduction voltage circuits；
The switch tube driving circuit is connected to resistance R1 including DSP output duty cycle signals, the other end of resistance R1 with
Resistance R2 be connected as a little and with the base stage of triode Q1（b1）It is connected, the other end of R2 is connected to LGND, triode Q1's
Emitter stage（e1）It is connected with LGND, resistance R3~R6 and+12V and LGND composition bleeder circuits, the colelctor electrode of Q1（c1）With R5,
The common port of R3 is connected, and the other end and the R6 of resistance R5 are connected as a little and are connected to 12V, and the common port of R3, R4 is connected
For any and with the grid of MOSFET pipes Q2（g2）Connection, the other end of R4 and the source electrode of MOSFET pipes Q2（s2）It is connected as a bit
And be connected with LGND, triode（Q3）, triode（Q4）Base stage be connected as a little and be connected with the other end of resistance R6,
NPN triode（Q3）Colelctor electrode（c3）It is connected to+12V, NPN triode（Q3）Emitter stage（e3）And PNP triode（Q4）
Colelctor electrode（c4）It is connected as a little and be connected with resistance R7, the other end of resistance R7 and the grid of the enhanced MOSFET of N-channel
（g5）It is connected；PNP triode（Q4）Colelctor electrode（e4）It is connected with the ground of power supply；The switching tube of the present embodiment drives
The structure of circuit opens moment NPN triode and works in saturation region in MOSFET, both improves load capacity, and NPN is reduced again
The loss of triode, when MOSFET is turned off, PNP triode works in saturation region moment, reduces the loss of PNP triode.
The BUCK reduction voltage circuits, are connected to a bit by the grid of the N-channel MOS FET pipes Q5 and one end of resistance R8
And be connected with described drive circuit output drive signal, MOSFET pipes（Q5）Source collection（S5）With fly-wheel diode（Q6）'s
Negative electrode is connected as a little and is connected with inductance L1, the other end of L1 and one end of polarity free capacitor C1 be connected as a little and with electricity
The positive pole connection of solution electric capacity C2, the negative pole of electrochemical capacitor C2 is connected as any and and LGND with the other end of polarity free capacitor C1
It is connected, diode（Q6）Anode be connected with LGND；The output of the BUCK reduction voltage circuits connects four radiator fans of parallel connection, defeated
Go out the positive input of voltage end wind-receiving fan, LGND wind-receiving fans are publicly.
The present embodiment, four DC radiation fans of parallel connection of real-time control, specification is Vmax=15V, Imax=0.5mA, four
Individual fan parallel running, has used the dc source of 12V to be input into as BUCK circuits, and circuit gross output is when rotating at full speed
24W, described switch tube driving circuit, in opening moment for MOSFET, NPN triode works in saturation region, reduces NPN tri-
The conduction loss of pole pipe, with should MOSFET shutdown moment PNP triodes also work in saturation region, reduce PNP triode
Loss, meanwhile, described push-pull circuit can significantly improve the speed that turns on and off of MOSFET compared with traditional scheme, most
Direct effect is to change output voltage so that radiator fan being capable of quick response.
Control chip DSP of the drive signal of the speed regulation circuit for fan of the present embodiment from ups system, its temperature detection letter
Number from the temperature sensor on power module radiator, DSP exports different dutycycles according to different temperature ranges, finally
Control the rotating speed of fan.
General principle of the present utility model, principal character and advantage of the present utility model has been shown and described above.One's own profession
The technical staff of industry it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply principle of the present utility model, the utility model also has respectively on the premise of the utility model spirit and scope are not departed from
Changes and improvements are planted, these changes and improvements are both fallen within the range of claimed the utility model.The utility model requirement
Protection domain defined by appending claims and its equivalent.
Claims (1)
1. a kind of alignment circuit of UPS DC radiation fans, it is characterised in that including fan, the BUCK connected with the fan
Reduction voltage circuit, the switch tube driving circuit for driving the BUCK reduction voltage circuits；
The switch tube driving circuit is connected to resistance R1, the other end and resistance of resistance R1 including DSP output duty cycle signals
R2 be connected as a little and with the base stage of triode Q1（b1）It is connected, the other end of R2 is connected to LGND, the transmitting of triode Q1
Pole（e1）It is connected with LGND, resistance R3~R6 and+12V and LGND composition bleeder circuits, the colelctor electrode of Q1（c1）With R5, R3
Common port is connected, and the other end and the R6 of resistance R5 are connected as a little and are connected to 12V, and the common port of R3, R4 is connected and is connected in one
Point and with the grid of MOSFET pipes Q2（g2）Connection, the other end of R4 and the source electrode of MOSFET pipes Q2（s2）Be connected as a little and with
LGND is connected, triode（Q3）, triode（Q4）Base stage be connected as a little and be connected with the other end of resistance R6, NPN
Triode（Q3）Colelctor electrode（c3）It is connected to+12V, NPN triode（Q3）Emitter stage（e3）And PNP triode（Q4）Collection
Electrode（c4）It is connected as a little and be connected with resistance R7, the other end of resistance R7 and the grid of the enhanced MOSFET of N-channel（g5）
It is connected；PNP triode（Q4）Colelctor electrode（e4）It is connected with the ground of power supply；
The BUCK reduction voltage circuits, by the grid of the N-channel MOS FET pipes Q5 and one end of resistance R8 be connected to a little and with
Described drive circuit output drive signal is connected, MOSFET pipes（Q5）Source collection（S5）With fly-wheel diode（Q6）Negative electrode
It is connected as a little and is connected with inductance L1, the other end of L1 is connected as a little and electric with electrolysis with one end of polarity free capacitor C1
Hold the positive pole connection of C2, negative pole and the other end of polarity free capacitor C1 of electrochemical capacitor C2 are connected as a little and are connected with LGND,
Diode（Q6）Anode be connected with LGND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621314567.7U CN206309628U (en) | 2016-12-02 | 2016-12-02 | A kind of alignment circuit of UPS DC radiation fans |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621314567.7U CN206309628U (en) | 2016-12-02 | 2016-12-02 | A kind of alignment circuit of UPS DC radiation fans |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206309628U true CN206309628U (en) | 2017-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621314567.7U Active CN206309628U (en) | 2016-12-02 | 2016-12-02 | A kind of alignment circuit of UPS DC radiation fans |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707655A (en) * | 2018-12-31 | 2019-05-03 | 航天柏克(广东)科技有限公司 | A kind of ups power and its liftable DC fan speed drive circuit |
-
2016
- 2016-12-02 CN CN201621314567.7U patent/CN206309628U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707655A (en) * | 2018-12-31 | 2019-05-03 | 航天柏克(广东)科技有限公司 | A kind of ups power and its liftable DC fan speed drive circuit |
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