CN206017231U - The control circuit of low pressure brushless DC blower - Google Patents
The control circuit of low pressure brushless DC blower Download PDFInfo
- Publication number
- CN206017231U CN206017231U CN201621015133.7U CN201621015133U CN206017231U CN 206017231 U CN206017231 U CN 206017231U CN 201621015133 U CN201621015133 U CN 201621015133U CN 206017231 U CN206017231 U CN 206017231U
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- current
- blower
- low pressure
- control circuit
- type driver
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Abstract
This utility model provides a kind of control circuit of low pressure brushless DC blower, it is controlled by the electric current to flowing through the low pressure brushless DC blower, blower fan pause, rotating speed saltus step and motor afterflow that voltage mode driver blower fan is present is solved the problems, such as, so that rotation speed of fan is stable.The control circuit of the low pressure brushless DC blower, including：Current-type driver and controller；The current-type driver is used for output driving current to drive the low pressure brushless DC blower；And controller output control signal, the driving current is controlled, to be controlled to the low pressure brushless DC blower.
Description
Technical field
This utility model is related to field of circuit technology, more particularly to a kind of control circuit of low pressure brushless DC blower.
Background technology
In such as low-temperature radiator, the control circuit for designing low pressure brushless DC blower is needed, to realize to the wind
The corresponding control of machine.Generally, according to the difference of the driver that the blower fan is driven in control circuit, can be divided into voltage mode driver
With two kinds of current-type driver.For voltage mode driver, when many motor parallels, voltage mode driver is consistent in blower fan
Property in terms of the defect that exists be that indivedual blower fans pause；The excessive saltus step of rotation speed of fan in same dutycycle increment；And in low pressure
Brushless DC blower two ends anti-paralleled diode is for shut-off afterflow etc..
Utility model content
In view of this, this utility model provides a kind of control circuit of low pressure brushless DC blower, by described to flowing through
The electric current of low pressure brshless DC motor is controlled, solve the blower fan that voltage mode driver blower fan is present pause, rotating speed saltus step with
And motor afterflow problem, so that rotation speed of fan is stable.
According to first aspect of the present utility model, there is provided a kind of control circuit of low pressure brushless DC blower, including：Electric current
Type driver and controller；The current-type driver is used for output driving current to drive the low pressure brushless DC blower；
And controller output control signal, the driving current is controlled, to be controlled to the low pressure brushless DC blower.
Further, the current-type driver includes current mode drive module, for driving the low pressure brushless direct-current
Blower fan.
Further, the current-type driver includes multiple current mode drive modules, 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, the current-type driver also includes level switch module, is connected to the control signal and electric current
Between type drive module, for the control signal is converted to analogue signal.
Further, the level switch module is RC low pass filters.
Further, the current mode drive module includes pliotron, and the control signal is by controlling the power
The base current of audion realizing the control of the driving current to pliotron output, so as to realize to described low
The control of pressure brushless DC blower.
Further, the current mode drive module further includes to be connected between the emitter stage of pliotron and ground
Resistance.
Further, the current-type driver further includes diode, is connected to the control signal and the electricity
Between flat modular converter.
Further, the current mode drive module is the pliotron for including that two emitter stage series connection, base stages are in parallel
Totem-pote circuit.
In such scheme of the present utility model, be controlled by the driving current to driving the blower fan, so as to gram
Taken the blower fan in the presence of voltage mode driver blower fan group pause, rotating speed saltus step and the problems such as motor afterflow, by institute
State the precise control of driving current so that the driving of blower fan and blower fan group is more stable, can further obtain for radiator
Obtain radiating effect well.And the electric current for crossing low pressure brushless DC blower by direct controlling stream, simplifies control circuit.
Further detailed description is done to the technical solution of the utility model below in conjunction with the drawings and the specific embodiments, this
The beneficial effect of utility model will be further appreciated.
Description of the drawings
Accompanying drawing described herein is used for providing further understanding to of the present utility model, constitutes of the present utility model one
Point, for explaining this utility model, do not constitute to improper restriction of the present utility model.
Fig. 1 shows the structure of the control circuit of the low pressure brushless DC blower according to one preferred embodiment of this utility model
Block diagram.
Fig. 2 shows the circuit diagram of the current-type driver according to this utility model first preferred embodiment.
Fig. 3 shows the circuit diagram of the current-type driver according to the second preferred embodiment of this utility model.
Fig. 4 shows the circuit diagram of the current-type driver according to this utility model third preferred embodiment.
Specific embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, concrete below in conjunction with this utility model
Embodiment and corresponding accompanying drawing are clearly and completely described to technical solutions of the utility model.Obviously, described embodiment
Only it is a part of embodiment of this utility model, rather than whole embodiments.Embodiment in based on this utility model, this area
The every other embodiment obtained under the premise of creative work is not made by those of ordinary skill, belongs to this utility model
The scope of protection.
The control circuit according to low pressure brushless DC blower described in the utility model is described with reference to Fig. 1 to Fig. 4 first.Figure
The structured flowchart of 1 control circuit for showing the low pressure brushless DC blower according to one preferred embodiment of this utility model.Fig. 2 shows
The circuit diagram of the current-type driver according to this utility model first preferred embodiment is gone out.Fig. 3 is shown according to this reality
Circuit diagram with the current-type driver of new second preferred embodiment.And Fig. 4 is shown according to this utility model
The circuit diagram of the current-type driver of three preferred embodiments.
As shown in figure 1, the control circuit includes current-type driver 1 and controller 2.The current-type driver 1 is used
In output driving current driving the low pressure brushless DC blower；And controller 2 is used for controlling the driving current, with right
The low pressure brushless DC blower is controlled.
In such scheme of the present utility model, be controlled by the driving current to driving the blower fan, so as to gram
Taken the blower fan in the presence of voltage mode driver blower fan group pause, rotating speed saltus step and the problems such as motor afterflow, by institute
State the precise control of driving current so that the driving of blower fan and blower fan group is more stable, can further obtain for radiator
Obtain radiating effect well.
Further, the current-type driver 1 includes current mode drive module 11, and for example, multiple current modes are driven
Dynamic model block 11, is respectively used to drive the multiple low pressure brushless DC blowers for constituting blower fan group.The plurality of current mode drive module
It is connected in parallel on dc bus 3.
The controller 2, for example, MCU, it is possible to use chip is realized, for controlling the driving current, so as to realize
To driver, the such as control of the speed of direct current generator.The controller 2 is exported to be believed for controlling the control of DC motor speed-regulating
Number, for example with pwm signal.For realizing that the pwm signal is converted to corresponding by the control to the current-mode controller 1, needs
Therefore the analogue signal of level, the current-mode controller 1 preferably include level switch module 12.The level switch module 12
For example can be realized using RC low pass filters (preferably second order RC lowpass filter).Additionally, the controller 2 can also be utilized
D/A module directly exports analogue signal.
The current-type driver 1 according to this utility model first preferred embodiment, in figure, needle stand are described with reference to Fig. 2
CN1 connects low pressure brushless DC blower, and PWM is control signal.The current-type driver 1 is included using pliotron Q1 as core
The current mode drive module 11 of heart element, pliotron Q1 are the relatively low pliotron of amplification coefficient, and which exports electricity
Stream can be according to the power type selecting of load, i.e. blower fan.It is further preferred that according to the driving current and the size of control signal,
Appropriate base resistance is chosen, and further by controlling base current come the driving current of controlling stream overload.Specifically
Ground, in span of control, needs to ensure that pliotron Q1 is operated in amplification region always, including the brushless electricity of the low-voltage direct
When machine reaches maximum (top) speed.Gain, low pressure brushless direct-current of the emission current to base current in conjunction with the pliotron Q1
The maximum rated current of motor and output PWM amplitudes, you can calculate suitable base resistance.Further, it is to realize temperature
Degree compensation, connect between pliotron Q1 emitter stages and ground a resistance R1, it is to avoid when temperature rise is larger, the low pressure without
Brush DC fan rotation speed change is excessive, affects overall performance.Additionally, when multiple described using multiple current mode drive module drives
The concordance of the pliotron during blower fan, need to be ensured, so that the low pressure brushless DC blower group rotating speed is consistent
Property.
In scheme shown in figure 2 above, the occupation mode amplification region electric current control of having used pliotron most basic
System, as long as when the control signal turns off low pressure brushless DC blower, slow shut-off allows and flows through the 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 adopted
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 shown in figure 3, be that the current-type driver 1 further includes diode D1 (which is numbered 13) according to this utility model, even
It is connected between control signal PWM and level switch module 12.Using the unilateral conduction of diode D1 so that store in electric capacity
Energy can only flow to pliotron Q1 when electric capacity discharges, so as to reach the mesh of time delayed turn-off using capacitor discharge time
's.
The current-type driver 1 according to this utility model third preferred embodiment is described in conjunction with Fig. 4.It is input to electric current
The control signal of type driver 1, such as PWM, need, with certain driving force, particularly to need to be input in the control signal
During in the multiple current mode drive modules 11 included by the current-type driver 1.If the chip output of controller MCU
Control signal underpower, then the current mode drive module adopt totem-pote circuit, with improve the control signal band carry
Ability.Specifically, as shown in figure 3, the current mode drive module 11 includes two emitter stage series connection, base stage is in parallel and connects
Pliotron Q2, Q3 to the outfan of level switch module 12.The level switch module 12 is, for example, RC low-pass filtering
Device.
In such scheme of the present utility model, be controlled by the driving current to driving the blower fan, so as to gram
Taken the blower fan in the presence of voltage mode driver blower fan group pause, rotating speed saltus step and the problems such as motor afterflow, by institute
State the precise control of driving current so that the driving of blower fan and blower fan group is more stable, can further obtain for radiator
Obtain radiating effect well.And the electric current for crossing low pressure brushless DC blower by direct controlling stream, simplifies control circuit.
Preferred embodiment of the present utility model is the foregoing is only, this utility model is not limited to, for this area
For technical staff, this utility model can have various changes and change.All institutes within spirit of the present utility model and principle
Any modification, equivalent substitution and improvements of work etc., should be included within protection domain of the present utility model.
Claims (10)
1. a kind of control circuit of low pressure brushless DC blower, including：
Current-type driver and controller；
The current-type driver is used for output driving current to drive the low pressure brushless DC blower；And controller output
Control signal, controls the driving current, to be controlled to the low pressure brushless DC blower.
2. control circuit as claimed in claim 1, wherein,
The current-type driver includes current mode drive module, for driving the low pressure brushless DC blower.
3. control circuit as claimed in claim 1, wherein,
The current-type driver includes multiple current mode drive modules, 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,
The current-type driver also includes level switch module, be connected to the control signal and current mode drive module it
Between, for the control signal is converted to analogue signal.
6. control circuit as claimed in claim 5, wherein,
The level switch module is RC low pass filters.
7. the control circuit as described in claim 2-4,6 any one, wherein,
The current mode drive module includes pliotron, and the control signal is electric by the base stage for controlling the pliotron
Stream realizing the control of the driving current to pliotron output, so as to realize to the low pressure brushless DC blower
Control.
8. control circuit as claimed in claim 7, wherein,
The current mode drive module further includes the resistance being connected between the emitter stage of pliotron and ground.
9. control circuit as claimed in claim 5, wherein,
The current-type driver further includes diode, be connected to the control signal and the level switch module it
Between.
10. the control circuit as described in claim 2-4,6, any one of 8-9, wherein,
The current mode drive module is to include two emitter stage series connection, the totem-pote circuit of the pliotron of base stage parallel connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621015133.7U CN206017231U (en) | 2016-08-31 | 2016-08-31 | The control circuit of low pressure brushless DC blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621015133.7U CN206017231U (en) | 2016-08-31 | 2016-08-31 | The control circuit of low pressure brushless DC blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206017231U true CN206017231U (en) | 2017-03-15 |
Family
ID=58256467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621015133.7U Active CN206017231U (en) | 2016-08-31 | 2016-08-31 | The control circuit of low pressure brushless DC blower |
Country Status (1)
| Country | Link |
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| CN (1) | CN206017231U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194810A (en) * | 2016-08-31 | 2016-12-07 | 珠海格力电器股份有限公司 | The control circuit of low pressure brushless DC blower |
| CN109831130A (en) * | 2019-02-28 | 2019-05-31 | 广东美的厨房电器制造有限公司 | Forward direction is driven in the reverse direction control circuit, direct current either-rotation motor and cooking apparatus |
| CN111076344A (en) * | 2019-12-09 | 2020-04-28 | 珠海格力电器股份有限公司 | Control method and system for automatically adjusting fan frequency reduction rate and storage medium |
-
2016
- 2016-08-31 CN CN201621015133.7U patent/CN206017231U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194810A (en) * | 2016-08-31 | 2016-12-07 | 珠海格力电器股份有限公司 | The control circuit of low pressure brushless DC blower |
| CN109831130A (en) * | 2019-02-28 | 2019-05-31 | 广东美的厨房电器制造有限公司 | Forward direction is driven in the reverse direction control circuit, direct current either-rotation motor and cooking apparatus |
| CN111076344A (en) * | 2019-12-09 | 2020-04-28 | 珠海格力电器股份有限公司 | Control method and system for automatically adjusting fan frequency reduction rate and storage medium |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |