CN106194810A - Control circuit of low-voltage brushless direct current fan - Google Patents
Control circuit of low-voltage brushless direct current fan Download PDFInfo
- Publication number
- CN106194810A CN106194810A CN201610795853.8A CN201610795853A CN106194810A CN 106194810 A CN106194810 A CN 106194810A CN 201610795853 A CN201610795853 A CN 201610795853A CN 106194810 A CN106194810 A CN 106194810A
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- CN
- China
- Prior art keywords
- current
- control circuit
- blower
- low pressure
- type driver
- 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.)
- Pending
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- 230000005611 electricity Effects 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000003321 amplification Effects 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/04—Arrangements for controlling or regulating the speed or torque of more than one motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/04—Arrangements for controlling or regulating the speed or torque of more than one motor
- H02P2006/045—Control of current
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention provides a control circuit of a low-voltage brushless direct current fan, which solves the problems of fan pause, rotating speed jump and motor follow current existing in a voltage type driver fan by controlling the current flowing through the low-voltage brushless direct current fan, thereby stabilizing the rotating speed of the fan. The control circuit of the low-voltage brushless direct current fan comprises: a current mode driver and controller; the current type driver is used for outputting driving current to drive the low-voltage brushless direct current fan; and the controller outputs a control signal to control the driving current so as to control the low-voltage brushless direct current fan.
Description
Technical field
The present invention relates to circuit engineering field, particularly relate to the control circuit of a kind of low pressure brushless DC blower.
Background technology
In such as low-temperature radiator, need to design the control circuit of low pressure brushless DC blower, to realize described wind
The corresponding control of machine.Generally, according to the difference of the driver driving described blower fan in control circuit, voltage mode driver can be divided into
With current-type driver two kinds.For voltage mode driver, when many motor parallels, voltage mode driver is consistent at blower fan
Property aspect exist defect be, indivedual blower fans pause；The excessive saltus step of rotation speed of fan when same dutycycle increment；And in low pressure
Brushless DC blower two ends anti-paralleled diode is for closing intermittent current etc..
Summary of the invention
In view of this, the present invention provides the control circuit of a kind of low pressure brushless DC blower, by flowing through described low pressure
The electric current of brshless DC motor is controlled, and solves blower fan pause, rotating speed saltus step and electricity that voltage mode driver blower fan exists
Machine afterflow problem, so that rotation speed of fan is stable.
According to the first aspect of the invention, it is provided that the control circuit of a kind of low pressure brushless DC blower, including: current mode is driven
Dynamic device and controller；Described current-type driver is used for output driving current to drive described low pressure brushless DC blower；And
Controller output control signal, controls described driving electric current, to be controlled described low pressure brushless DC blower.
Further, described current-type driver includes current mode drive module, is used for driving described low pressure brushless direct-current
Blower fan.
Further, described current-type driver includes multiple current mode drive module, is respectively used to drive composition blower fan
Multiple low pressure brushless DC blowers of group.
Further, the plurality of current mode drive wired in parallel is on dc bus.
Further, described current-type driver also includes level switch module, is connected to described control signal and electric current
Type drives between module, for described control signal is converted to analogue signal.
Further, described level switch module is RC low pass filter.
Further, described current mode drive module includes pliotron, and described control signal is by controlling this power
The base current of audion realizes the control of the described driving electric current exporting this pliotron, thus realizes described low
The control of pressure brushless DC blower.
Further, described current mode drive module farther includes to be connected between the emitter stage of pliotron and ground
Resistance.
Further, described current-type driver farther includes diode, is connected to described control signal and described electricity
Between flat modular converter.
Further, described current mode drive module is to include the pliotron that two emitter stage series connection, base stage are in parallel
Totem-pote circuit.
In the such scheme of the present invention, by the driving electric current driving described blower fan is controlled, thus overcome
The problems such as blower fan pause, rotating speed saltus step and motor afterflow in the presence of voltage mode driver blower fan group, by driving described
The accurate control of streaming current so that the driving of blower fan and blower fan group is more stable, for radiator and then can obtain good
Good radiating effect.And by directly controlling to flow through the electric current of low pressure brushless DC blower, simplify control circuit.
Below in conjunction with the drawings and the specific embodiments, technical scheme is further detailed description, the present invention
Beneficial effect will be further appreciated.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, is used for
Explain the present invention, be not intended that inappropriate limitation of the present invention.
Fig. 1 shows the structural frames of the control circuit of low pressure brushless DC blower according to one preferred embodiment of the present invention
Figure.
Fig. 2 shows the circuit diagram of the current-type driver according to first preferred embodiment of the invention.
Fig. 3 shows the circuit diagram of the current-type driver according to second preferred embodiment of the invention.
Fig. 4 shows the circuit diagram of the current-type driver according to third preferred embodiment of the invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described by corresponding accompanying drawing.Obviously, described embodiment is only the present invention one
Section Example rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
First combine Fig. 1 to Fig. 4 and the control circuit according to low pressure brushless DC blower of the present invention is described.Fig. 1 shows
Go out the structured flowchart of the control circuit of low pressure brushless DC blower according to one preferred embodiment of the present invention.Fig. 2 shows root
Circuit diagram according to the described current-type driver of first preferred embodiment of the invention.Fig. 3 shows according to the present invention second preferred
The circuit diagram of the described current-type driver of embodiment.And Fig. 4 shows according to described in third preferred embodiment of the invention
The circuit diagram of current-type driver.
As it is shown in figure 1, described control circuit includes current-type driver 1 and controller 2.Described current-type driver 1 is used
In output driving current to drive described low pressure brushless DC blower；And controller 2 is used for controlling described driving electric current, with right
Described low pressure brushless DC blower is controlled.
In the such scheme of the present invention, by the driving electric current driving described blower fan is controlled, thus overcome
The problems such as blower fan pause, rotating speed saltus step and motor afterflow in the presence of voltage mode driver blower fan group, by driving described
The accurate control of streaming current so that the driving of blower fan and blower fan group is more stable, for radiator and then can obtain good
Good radiating effect.
Further, described current-type driver 1 includes current mode drive module 11, and the most multiple current mode is driven
Dynamic model block 11, is respectively used to drive the multiple low pressure brushless DC blowers constituting blower fan group.The plurality of current mode drive module
It is connected in parallel on dc bus 3.
Described controller 2, for example, MCU, it is possible to use chip realizes, and is used for controlling described driving electric current, thus realizes
Control to the speed of driver, such as direct current generator.The output of described controller 2 is for controlling the control letter of DC motor speed-regulating
Number, for example with pwm signal.For realizing the control to described current-mode controller 1, need this pwm signal is converted to correspondence
The analogue signal of level, therefore described current-mode controller 1 preferably includes level switch module 12.Described level switch module 12
RC low pass filter (preferably second order RC lowpass filter) such as can be utilized to realize.Additionally, described controller 2 can also utilize
D/A module directly exports analogue signal.
Describing the current-type driver 1 according to first preferred embodiment of the invention below in conjunction with Fig. 2, in figure, needle stand CN1 connects
Low pressure brushless DC blower, PWM is control signal.Described current-type driver 1 includes using pliotron Q1 as core unit
The current mode drive module 11 of part, this pliotron Q1 is the pliotron that amplification coefficient is relatively low, and its output electric current can
Power type selecting according to load, i.e. blower fan.It is further preferred that according to described driving electric current and the size of control signal, choose
Suitable base resistance, and control to flow through the described driving electric current of load by control base current further.Specifically, exist
In span of control, need guaranteed output audion Q1 to be the most all operated in amplification region, reach including described low-voltage direct brushless electric machine
During to maximum (top) speed.In conjunction with the emission current of described pliotron Q1 to the gain of base current, low pressure brshless DC motor
Maximum rated current and output PWM amplitude, suitable base resistance can be calculated.Further, for realizing temperature benefit
Repaying, connect between pliotron Q1 emitter stage and ground a resistance R1, it is to avoid when temperature rise is bigger, and described low pressure is brushless directly
Flow fan rotation speed change is excessive, affects overall performance.Additionally, when using the multiple described blower fan of multiple current mode drive module drive
Time, the concordance of described pliotron need to be ensured, so that the concordance of described low pressure brushless DC blower group rotating speed.
In scheme shown in figure 2 above, use the occupation mode amplification region electric current control that pliotron is most basic
System, as long as when described control signal turns off low pressure brushless DC blower, slowly turning off, allowing and flow through described low pressure brushless direct-current wind
The electric current of machine is slowly declined to 0, avoids the need for fan and adds continuous current circuit.It is further preferred that time delayed turn-off can also be used
Circuit so that the discharge current of electric capacity discharge loop can only flow to pliotron, reaches the purpose of time delayed turn-off.Specifically,
As it is shown on figure 3, be according to the present invention, described current-type driver 1 farther includes diode D1 (it is numbered 13), is connected to
Between control signal PWM and level switch module 12.Utilize the unilateral conduction of this diode D1 so that the energy stored in electric capacity
Amount can only flow to pliotron Q1 when electric capacity discharges, thus utilizes capacitor discharge time to reach the purpose of time delayed turn-off.
In conjunction with Fig. 4, the described current-type driver 1 according to third preferred embodiment of the invention is described.It is input to current mode drive
The control signal of dynamic device 1, such as PWM, need that there is certain driving force, particularly need to be input to institute in this control signal
When stating in the multiple current mode drive modules 11 included by current-type driver 1.If the control of the chip output of controller MCU
Signal power is not enough, and the most described current mode drive module uses totem-pote circuit, to improve the load capacity of described control signal.
Specifically, as it is shown on figure 3, described current mode drive module 11 includes two emitter stage series connection, base stage is in parallel and is connected to electricity
Pliotron Q2, Q3 of the outfan of flat modular converter 12.Described level switch module 12 for example, RC low pass filter.
In the such scheme of the present invention, by the driving electric current driving described blower fan is controlled, thus overcome
The problems such as blower fan pause, rotating speed saltus step and motor afterflow in the presence of voltage mode driver blower fan group, by driving described
The accurate control of streaming current so that the driving of blower fan and blower fan group is more stable, for radiator and then can obtain good
Good radiating effect.And by directly controlling to flow through the electric current of low pressure brushless DC blower, simplify control circuit.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for those skilled in the art
For, the present invention can have various change and change.All made within spirit and principles of the present invention any amendment, equivalent
Replacement, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a control circuit for low pressure brushless DC blower, including:
Current-type driver and controller；
Described current-type driver is used for output driving current to drive described low pressure brushless DC blower；And controller output
Control signal, controls described driving electric current, to be controlled described low pressure brushless DC blower.
2. control circuit as claimed in claim 1, wherein,
Described current-type driver includes current mode drive module, is used for driving described low pressure brushless DC blower.
3. control circuit as claimed in claim 1, wherein,
Described current-type driver includes multiple current mode drive module, be respectively used to drive constitute blower fan group multiple low pressure without
Brush DC fan.
4. control circuit as claimed in claim 3, wherein,
The plurality of current mode drive wired in parallel is on dc bus.
5. the control circuit as described in any one of claim 2-4, wherein,
Described current-type driver also includes level switch module, be connected to described control signal and current mode drive module it
Between, for described control signal is converted to analogue signal.
6. control circuit as claimed in claim 5, wherein,
Described level switch module is RC low pass filter.
7. the control circuit as described in any one of claim 2-6, wherein,
Described current mode drive module includes pliotron, and described control signal is by controlling the base stage electricity of this pliotron
Stream realizes the control of the described driving electric current exporting this pliotron, thus realizes described low pressure brushless DC blower
Control.
8. control circuit as claimed in claim 7, wherein,
Described current mode drive module farther includes the resistance being connected between the emitter stage of pliotron and ground.
9. the control circuit as described in claim 5 or 6, wherein,
Described current-type driver farther includes diode, be connected to described control signal and described level switch module it
Between.
10. the control circuit as described in any one of claim 2-9, wherein,
Described current mode drive module is the totem-pote circuit of the pliotron including two emitter stage series connection, base stage parallel connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610795853.8A CN106194810A (en) | 2016-08-31 | 2016-08-31 | Control circuit of low-voltage brushless direct current fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610795853.8A CN106194810A (en) | 2016-08-31 | 2016-08-31 | Control circuit of low-voltage brushless direct current fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106194810A true CN106194810A (en) | 2016-12-07 |
Family
ID=58085649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610795853.8A Pending CN106194810A (en) | 2016-08-31 | 2016-08-31 | Control circuit of low-voltage brushless direct current fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106194810A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115268555A (en) * | 2022-07-27 | 2022-11-01 | 成都振芯科技股份有限公司 | Second-order temperature compensation band gap reference voltage circuit and differential circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050036769A1 (en) * | 2003-08-14 | 2005-02-17 | Phoenixtec Power Co., Ltd. | Radiator fan driving module applied to a power system or a power supply device |
| CN1758525A (en) * | 2004-10-08 | 2006-04-12 | 鸿富锦精密工业（深圳）有限公司 | DC fan starting circuit |
| CN1808889A (en) * | 2006-01-05 | 2006-07-26 | 山东九阳小家电有限公司 | Speed governing control method and speed governor for cooling fan of electromagnetic oven |
| CN2938627Y (en) * | 2006-08-23 | 2007-08-22 | 海信集团有限公司 | TV. set with geomagnetic correcting circuit |
| CN204517774U (en) * | 2015-04-13 | 2015-07-29 | 常州瑞阳电装有限公司 | A kind of motorcycle tilting switch with delay function |
| CN206017231U (en) * | 2016-08-31 | 2017-03-15 | 珠海格力电器股份有限公司 | Control circuit of low-voltage brushless direct current fan |
-
2016
- 2016-08-31 CN CN201610795853.8A patent/CN106194810A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050036769A1 (en) * | 2003-08-14 | 2005-02-17 | Phoenixtec Power Co., Ltd. | Radiator fan driving module applied to a power system or a power supply device |
| CN1758525A (en) * | 2004-10-08 | 2006-04-12 | 鸿富锦精密工业（深圳）有限公司 | DC fan starting circuit |
| CN1808889A (en) * | 2006-01-05 | 2006-07-26 | 山东九阳小家电有限公司 | Speed governing control method and speed governor for cooling fan of electromagnetic oven |
| CN2938627Y (en) * | 2006-08-23 | 2007-08-22 | 海信集团有限公司 | TV. set with geomagnetic correcting circuit |
| CN204517774U (en) * | 2015-04-13 | 2015-07-29 | 常州瑞阳电装有限公司 | A kind of motorcycle tilting switch with delay function |
| CN206017231U (en) * | 2016-08-31 | 2017-03-15 | 珠海格力电器股份有限公司 | Control circuit of low-voltage brushless direct current fan |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115268555A (en) * | 2022-07-27 | 2022-11-01 | 成都振芯科技股份有限公司 | Second-order temperature compensation band gap reference voltage circuit and differential circuit |
| CN115268555B (en) * | 2022-07-27 | 2024-05-28 | 成都振芯科技股份有限公司 | Second-order temperature compensation band gap reference voltage circuit and differential circuit |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161207 |