CN106230337A - A kind of fan decompression speed device and fan apparatus - Google Patents
A kind of fan decompression speed device and fan apparatus Download PDFInfo
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- CN106230337A CN106230337A CN201610819838.2A CN201610819838A CN106230337A CN 106230337 A CN106230337 A CN 106230337A CN 201610819838 A CN201610819838 A CN 201610819838A CN 106230337 A CN106230337 A CN 106230337A
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- 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
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
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Abstract
The invention provides a kind of fan decompression speed device and fan apparatus, wherein, this fan decompression speed device includes: common optical coupler isolation circuit, pulse shaper and the electromotor voltage reduction speed-adjusting circuit being sequentially connected with；Common optical coupler isolates circuit, including common optical coupler；Common optical coupler isolation circuit passes through common optical coupler, is driven electromotor voltage reduction speed-adjusting circuit.The fan decompression speed device of present invention offer and fan apparatus, can reduce the cost of fan decompression speed device.
Description
Technical field
The present invention relates to control circuit technical field, set in particular to a kind of fan decompression speed device and fan
Standby.
Background technology
At present, as the integrated level of circuit is more and more higher, especially in the case that circuit is operated in high power, big voltage
When, the heat dissipation problem of circuit just becomes relatively to highlight.In order to solve the heat dissipation problem of circuitry, fan is effective as one
Heat radiation instrument have been obtained for more and more being widely applied.Wherein, the wind speed of fan is bigger, and radiating effect is stronger.But if
Fan rotating speed in the course of the work remains unchanged, and can cause energy waste, too increase environmental noise.Therefore, can be in fan
Electromotor voltage reduction speed-adjusting circuit is installed, thus according to the temperature of working environment, decompression speed operation is carried out to fan.
In correlation technique, fan decompression speed device can use high speed photo coupling to other electricity in fan decompression speed device
Road is driven.
In realizing process of the present invention, inventor finds that in prior art, at least there are the following problems:
Although the high speed photo coupling that existing fan decompression speed device uses can complete to drive fan decompression speed device
Work, but use cost is higher, is not suitable for using on a large scale.
Content of the invention
In view of this, the purpose of the embodiment of the present invention is to provide a kind of fan decompression speed device and fan apparatus, with
Reduce the cost of fan decompression speed device.
First aspect, embodiments provides a kind of fan decompression speed device, comprising: the normal light being sequentially connected with
Coupling isolation circuit, pulse shaper and electromotor voltage reduction speed-adjusting circuit；
Described common optical coupler isolates circuit, including common optical coupler；
Described common optical coupler isolation circuit passes through described common optical coupler, is driven described electromotor voltage reduction speed-adjusting circuit.
In conjunction with first aspect, embodiments provide the first possible embodiment of first aspect, wherein: institute
State common optical coupler isolation circuit, comprising: the first resistance, described common optical coupler and the second resistance；
One end of described first resistance is connected with voltage source, and the other end is connected with the one end on the former limit of described common optical coupler；
One end of the secondary of described common optical coupler is connected with one end of described second resistance, the other end and described shaping pulse
Circuit connects；
The other end of described second resistance is connected with described pulse shaper.
In conjunction with first aspect, embodiments provide the possible embodiment of the second of first aspect, wherein: institute
State pulse shaper, comprising: the first electric capacity, the second electric capacity, polarized electric capacity, the 3rd resistance, voltage-stabiliser tube and shaping pulse mould
Block；
One end of described first electric capacity is connected with direct voltage source, and the other end is grounded；
One end of described polarized electric capacity is connected with described second resistance, and the other end is grounded；
One end of described second electric capacity is connected with described shaping pulse module, and the other end is grounded；
One end of described 3rd resistance is connected with described shaping pulse module, and the other end is grounded；
The positive pole of described voltage-stabiliser tube is connected with direct voltage source, negative pole respectively with described second resistance and described shaping pulse
Module connects；
Described shaping pulse module, is also connected with the secondary of described common optical coupler.
In conjunction with first aspect, embodiments provide the third possible embodiment of first aspect, wherein: institute
State shaping pulse module, use 555 timers；
Described shaping pulse module includes eight pins, wherein, the first pin ground connection, the second pin and described 3rd resistance
Connecting, the 3rd pin is connected with described electromotor voltage reduction speed-adjusting circuit, the 4th pin and the 8th pin negative pole with described voltage-stabiliser tube respectively
Connecting, the 5th pin is connected with described second electric capacity, and the 6th pin and described second pin short circuit, the 7th pin sky connects；
Described shaping pulse module, constitutes Schmidt trigger by described 6th pin with described second pin short circuit,
Shaping operation is carried out to the impulse waveform of described common optical coupler isolation circuit output.
In conjunction with first aspect, embodiments provide the 4th kind of possible embodiment of first aspect, wherein: institute
State electromotor voltage reduction speed-adjusting circuit, comprising: the 5th resistance, the 3rd electric capacity, the 4th electric capacity, the second diode, metal-oxide-semiconductor and inductance；
Described 5th resistance downlink connection are between the grid and drain electrode of described metal-oxide-semiconductor；
One end of described 3rd electric capacity is connected with direct voltage source, and the other end is grounded；
The positive pole of described second diode is connected with direct voltage source, and negative pole is connected with the source electrode of described metal-oxide-semiconductor；
One end of described inductance is connected with the source class of described metal-oxide-semiconductor, and the other end is connected with described 4th electric capacity；
One end of described 4th electric capacity is connected with direct voltage source, the other end and described inductance connection；
Described electromotor voltage reduction speed-adjusting circuit, is adjusted to output voltage by described metal-oxide-semiconductor.
In conjunction with first aspect, embodiments provide the 5th kind of possible embodiment of first aspect, wherein: institute
State electromotor voltage reduction speed-adjusting circuit, also include: the 4th resistance；
One end of described 4th resistance is connected with described 3rd pin of described shaping pulse module, the other end with described
The grid of metal-oxide-semiconductor connects.
In conjunction with first aspect, embodiments provide the 6th kind of possible embodiment of first aspect, wherein: institute
State electromotor voltage reduction speed-adjusting circuit, also include: the first diode；
Described first diode downlink connection are between the grid and drain electrode of described metal-oxide-semiconductor.
In conjunction with first aspect, embodiments provide the 7th kind of possible embodiment of first aspect, wherein: institute
State the FET that metal-oxide-semiconductor uses model to be NTD20N06.
In conjunction with first aspect, embodiments provide the 8th kind of possible embodiment of first aspect, wherein: institute
State fan decompression speed device, also include: secondary cell；
Described secondary cell, respectively with described common optical coupler isolation circuit, pulse shaper and electromotor voltage reduction speed-adjusting circuit even
Connect；
Described secondary cell, respectively described common optical coupler isolation circuit, pulse shaper and electromotor voltage reduction speed-adjusting circuit supply
Electricity.
Second aspect, the embodiment of the present invention provides a kind of fan apparatus, including the fan fall described in the claims 1-9
Pressure arrangements for speed regulation and DC fan；
Described fan decompression speed device is connected with described DC fan, is used for controlling described DC fan.
The fan decompression speed device of embodiment of the present invention offer and fan apparatus, set in common optical coupler isolation circuit
The common optical coupler put, is driven to electromotor voltage reduction speed-adjusting circuit, is filled fan decompression speed by high speed photo coupling in prior art
Put and be driven comparing, use cheap common optical coupler just can complete the driving work to fan decompression speed device,
Without the high speed photo coupling that use cost is high, reduce the use cost of fan decompression speed device, improve fan step-down and adjust
The range of speed variator.
For making the above-mentioned purpose of the present invention, feature and advantage to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Brief description
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, attached by use required in embodiment below
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, and it is right to be therefore not construed as
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 shows the general construction schematic diagram of a kind of fan decompression speed device that the embodiment of the present invention provided；
Fig. 2 shows the detailed construction schematic diagram of a kind of fan decompression speed device that the embodiment of the present invention provided.
Detailed description of the invention
Purpose, technical scheme and advantage for making the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
Middle accompanying drawing, is clearly and completely described to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only
It is a part of embodiment of the present invention, rather than whole embodiments.The present invention generally described and illustrated in accompanying drawing herein is real
The assembly executing example can be arranged with various different configurations and design.Therefore, below to the present invention's providing in the accompanying drawings
The detailed description of embodiment is not intended to limit the scope of claimed invention, but is merely representative of the selected reality of the present invention
Execute example.Based on embodiments of the invention, institute that those skilled in the art are obtained on the premise of not making creative work
Have other embodiments, broadly fall into the scope of protection of the invention.
At present, fan decompression speed device can use high speed photo coupling to carry out other circuit in fan decompression speed device
Drive.Although the high speed photo coupling that existing fan decompression speed device uses can complete to drive the work of fan decompression speed device
Make, but use cost is higher, is not suitable for using on a large scale.Based on this, the application provide a kind of fan decompression speed device
And fan apparatus.
It should be noted that in describing the invention, term " " center ", " on ", D score, "left", "right", " vertically ",
The orientation of the instruction such as " level ", " interior ", " outward " or position relationship are based on orientation shown in the drawings or position relationship, merely to
Be easy to describe the present invention and simplifying to describe, rather than instruction or the hint device of indication or element must have specific orientation,
It with specific azimuth configuration and operation, is therefore not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicate or hint relative importance.
In addition, in describing the invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " even
Connect " should be interpreted broadly, for example, it may be fixing connect, it is also possible to be to removably connect, or be integrally connected；It can be machine
Tool connects, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two units
Connection within part.For the ordinary skill in the art, above-mentioned term can be understood in the present invention with concrete condition
Concrete meaning.
A kind of fan decompression speed dress for ease of the present embodiment is understood, first disclosed in the embodiment of the present invention
Put and describe in detail.
Seeing Fig. 1 and Fig. 2, the present embodiment provides a kind of fan decompression speed device, comprising: the light-coupled isolation being sequentially connected with
Circuit the 100th, pulse shaper 102 and electromotor voltage reduction speed-adjusting circuit 104；
Optical coupling isolation circuit 100, including common optical coupler U1；
Optical coupling isolation circuit 100 passes through common optical coupler U1, is driven electromotor voltage reduction speed-adjusting circuit 104.
Specifically, optical coupling isolation circuit 100, comprising: the first resistance R1, above-mentioned common optical coupler U1 and the second resistance R2；
One end of above-mentioned first resistance R1 is connected with voltage source 5V, the one end on the former limit of the other end and above-mentioned common optical coupler U1
Connect；
One end of the secondary of above-mentioned common optical coupler U1 is connected with one end of above-mentioned second resistance R2, the other end and above-mentioned pulse
Shaping circuit 102 connects；
The other end of above-mentioned second resistance R2 is connected with above-mentioned pulse shaper 102.
In above-mentioned optical coupling isolation circuit 100, the other end on the former limit of common optical coupler U1 receives the control instruction of fan, makes
Obtain fan decompression speed device to be controlled electromotor voltage reduction speed-adjusting circuit 104 according to the control instruction receiving.
The input of common optical coupler U1 accepts pulse width modulation (Pulse Width Modulation, the PWM) arteries and veins of 5V
Rushing signal, high level turns on, and low level is ended, and common optical coupler U1 is mainly used to isolate the pulse signal of input, wherein
First resistance R1 and the second resistance R2 is the current-limiting resistance of common optical coupler U1 input and output respectively.
Common optical coupler U1 can use any one of optocoupler of following model: TLP521-1, TLP521-2,
TLP521-4,4N25,4N35 and 6N136.
Owing to common optical coupler exists time delay when turning on and off, the generation of this time delay is mainly triode
Produce when entering saturated, be inevitable, due to the existence of time delay so that the output waveform deformation of common optical coupler,
The impulse waveform edge of deformation is smooth and does not have sharp edge, so well can not control electromotor voltage reduction speed-adjusting circuit 104
System.It is so accomplished by carrying out shaping to the impulse waveform of common optical coupler output, in order to the impulse waveform exporting common optical coupler is entered
Row shaping, above-mentioned pulse shaper 102, comprising: the first electric capacity C1, the second electric capacity C2, polarized electric capacity EP1, the 3rd resistance
R3, voltage-stabiliser tube Z1 and shaping pulse module U2；
One end of above-mentioned first electric capacity C1 is connected with direct voltage source 24Vin, and the other end is grounded；
One end of above-mentioned polarized electric capacity EP1 is connected with above-mentioned second resistance R2, and the other end is grounded；
One end of above-mentioned second electric capacity C2 is connected with above-mentioned shaping pulse module U2, and the other end is grounded；
One end of above-mentioned 3rd resistance R3 is connected with above-mentioned shaping pulse module U2, and the other end is grounded；
The positive pole of above-mentioned voltage-stabiliser tube Z1 is connected with direct voltage source 24Vin, negative pole respectively with above-mentioned second resistance R2 and upper
State shaping pulse module U2 to connect；
Above-mentioned shaping pulse module U2, is also connected with the secondary of above-mentioned common optical coupler U1.
Above-mentioned shaping pulse module U2, uses 555 timers；
Above-mentioned shaping pulse module U2 includes eight pins, and wherein, the first pin 1 is grounded, and the second pin 1 is with the above-mentioned 3rd
Resistance R3 connect, the 3rd pin 3 is connected with above-mentioned electromotor voltage reduction speed-adjusting circuit 104, the 4th pin 4 and the 8th pin 8 respectively with above-mentioned
The negative pole of voltage-stabiliser tube Z1 connects, and the 5th pin 5 is connected with above-mentioned second electric capacity C2, the 6th pin 6 and above-mentioned second pin short circuit,
7th pin 7 sky connects；
Above-mentioned shaping pulse module U2, constitutes schmidt trigger by above-mentioned 6th pin 6 and above-mentioned second pin 2 short circuit
Device, carries out shaping operation to the impulse waveform of above-mentioned optical coupling isolation circuit 100 output.
Shaping pulse module U2 uses NE555 timer, by the 4th pin 4 and the 8th pin 8 of shaping pulse module U2
Being shorted together the input as triggering level, the second pin 2 and the 6th pin 6 are connected together as signal input part, make
Obtain 555 timers and constitute Schmidt triggers.5th pin 5 pin of shaping pulse module U2 is control voltage end, here by
The second electric capacity C2 ground connection of one 0.01 μ F, it is ensured that stablizing of shaping pulse inside modules datum, the second electric capacity C2 plays filter
Ripple effect.7th pin 7 of shaping pulse module U2 is discharge end, and shaping pulse module U2 is used as electric capacity electric discharge during timer,
This end is connected with discharge tube colelctor electrode；When shaping pulse module U2 is used as Schmidt trigger use, the 7th pin 7 is unsettled.Arteries and veins
Rushing the 1 pin ground connection of Shaping Module U2,3 pin are the output of shaping pulse module U2.
The triggering level importation of shaping pulse module U2, have selected the voltage-stabiliser tube Z1 that burning voltage is 9V herein, is
Shaping pulse module U2 provides the stable triggering level of 24V-9V=15V.First electric capacity C1, polarized electric capacity EP1 are respectively
It is direct voltage source 24Vin and the filter capacitor of shaping pulse module U215V triggering level.
Above-mentioned shaping pulse module U2 mainly utilizes NE555 timer to constitute the return difference characteristic of Schmidt trigger by commonly
The pulse waveform shaper that the edge of optocoupler U1 output is smooth is the precipitous impulse waveform in edge, drives decompression speed electricity with more preferable
The conducting of metal-oxide-semiconductor Q1 and cut-off in road 104.The hysteresis voltage of Schmidt trigger is 2/3VCC-1/3VCC=1/3VCC=5V,
Wherein VCC is the triggering level of input, is 15V.When input pulse voltage rises to 2/3VCC, shaping pulse module U2 defeated
Go out voltage and be converted to low level from high level, when input pulse voltage drops to 1/3VCC, the output of shaping pulse module U2
Voltage again from low transition be high level.
By pulse shaper 102 described above, can be by the pulse signal through common optical coupler U1 isolation of input
It is shaped as the precipitous impulse waveform in edge, turning on and off of metal-oxide-semiconductor Q1 can well be driven.
In order to preferably DC fan is controlled, above-mentioned electromotor voltage reduction speed-adjusting circuit 104, comprising: the 5th resistance R5, the 3rd
Electric capacity C3, the 4th electric capacity C4, the second diode Q2, metal-oxide-semiconductor Q1 and inductance L1；
Above-mentioned 5th resistance R5 downlink connection are between the grid and drain electrode of above-mentioned metal-oxide-semiconductor Q1；
One end of above-mentioned 3rd electric capacity C3 is connected with direct voltage source 24Vin, and the other end is grounded；
The positive pole of above-mentioned second diode Q2 is connected with direct voltage source 24Vin, and negative pole connects with the source electrode of above-mentioned metal-oxide-semiconductor Q1
Connect；
One end of above-mentioned inductance L1 is connected with the source class of above-mentioned metal-oxide-semiconductor Q1, and the other end is connected with above-mentioned 4th electric capacity C4；
One end of above-mentioned 4th electric capacity C4 is connected with direct voltage source 24Vin, and the other end is connected with above-mentioned inductance L1；
Above-mentioned electromotor voltage reduction speed-adjusting circuit 104, is adjusted to output voltage by above-mentioned metal-oxide-semiconductor Q1.
The output voltage of above-mentioned electromotor voltage reduction speed-adjusting circuit 104=input pulse * dutycycle, by changing the duty of input pulse
Ratio, control metal-oxide-semiconductor Q1 open and the turn-off time reach change output voltage effect.Preferably, the selection type of metal-oxide-semiconductor Q1
Number for the FET of NTD20N06, this kind of FET is pressure height, output electric current is big.
In above-mentioned electromotor voltage reduction speed-adjusting circuit 104, the 3rd electric capacity C3 is direct voltage source 24Vin in electromotor voltage reduction speed-adjusting circuit 104
The filter capacitor of input, the second diode D2 plays afterflow effect.When metal-oxide-semiconductor Q1 turns on, inductance L1 charges, and the 4th electric capacity C4 carries
For load DC blower voltage；When metal-oxide-semiconductor Q1 ends, inductance L1, by the second diode D2 electric discharge, provides the 4th electric capacity C4
Voltage with DC fan.
For changing before and after input pulse along steepness and preventing input pulse from vibrate, above-mentioned electromotor voltage reduction speed-adjusting circuit 104, and also
Including: the 4th resistance R4；
One end of above-mentioned 4th resistance R4 is connected with above-mentioned 3rd pin 3 of above-mentioned shaping pulse module U2, the other end with
The grid of above-mentioned metal-oxide-semiconductor Q1 connects.
Describe it can be seen that at one the 4th resistance R4 of gate series of metal-oxide-semiconductor Q1 by above, thus change input
Along steepness and prevent input pulse from vibrating before and after pulse, it is possible to reduce the due to voltage spikes of colelctor electrode.
Further, in order to ensure not have when metal-oxide-semiconductor Q1 works high voltage be added to grid and puncture insulating barrier and
Metal-oxide-semiconductor Q1 is caused to damage, above-mentioned electromotor voltage reduction speed-adjusting circuit 104, also include: the first diode Q1；
Above-mentioned first diode Q1 downlink connection are between the grid and drain electrode of above-mentioned metal-oxide-semiconductor Q1.
By above description it can be seen that in electromotor voltage reduction speed-adjusting circuit 104, by above-mentioned first diode Q1 to MOS
The voltage of pipe Q1 carries out two-way transient state suppression so that does not have high voltage during metal-oxide-semiconductor Q1 work and is added to grid and punctures metal-oxide-semiconductor
The insulating barrier of Q1, it is ensured that will not damage during metal-oxide-semiconductor Q1 work.
In order to make fan decompression speed device when power supply can not continue to power fan decompression speed device because of fault,
Fan decompression speed device can also be made to work on, said fans decompression speed device, also include: secondary cell 106；
Above-mentioned secondary cell 106, respectively with above-mentioned optical coupling isolation circuit the 100th, pulse shaper 102 and decompression speed electricity
Road 104 connects；
Above-mentioned secondary cell 106, respectively above-mentioned optical coupling isolation circuit the 100th, pulse shaper 102 and decompression speed electricity
Road 104 powers.
Wherein, secondary cell can be lithium battery, nickel-based battery, can also is that other any can fill for fan decompression speed
Put the rechargeable battery that electricity is provided, no longer repeat one by one here.
By arranging the stand-by power supply as fan decompression speed device for the secondary cell, can be in the feelings of the unexpected power-off of fan
Under condition, by being that fan decompression speed device is powered as the secondary cell of stand-by power supply so that the administrative staff of DC fan
When the power failure powered to fan, close DC fan by fan decompression speed device to timely, it is to avoid by
Cause the generation of fan damaged condition in unexpected power-off.
Above-mentioned fan electromotor voltage reduction speed-adjusting circuit has been successfully applied to low pressure static passive compensation device and active power filtering
In device device, adjust input pulse dutycycle according to plant running power situation, carry out step-down to the DC fan in device and adjust
Speed, has the advantages that speed adjustable range is wide, product noise is little and low in energy consumption.
The present embodiment, it is also proposed that a kind of fan apparatus, including above-mentioned fan decompression speed device and DC fan；
Said fans decompression speed device is connected with above-mentioned DC fan, is used for controlling above-mentioned DC fan.
In sum, the present embodiment provide fan decompression speed device and fan apparatus, by common optical coupler isolation electricity
The common optical coupler arranging in road, is driven to electromotor voltage reduction speed-adjusting circuit, is depressured fan by high speed photo coupling in prior art
Arrangements for speed regulation are driven comparing, and use cheap common optical coupler just can complete the driving to fan decompression speed device
Work, it is not necessary to the high high speed photo coupling of use cost, reduces the use cost of fan decompression speed device, improves fan fall
The range of pressure arrangements for speed regulation.
Those skilled in the art is it can be understood that arrive, for convenience and simplicity of description, the system of foregoing description,
The specific works process of device and unit, is referred to the corresponding process in preceding method embodiment, does not repeats them here.
Above-mentioned above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art, in the technical scope that the invention discloses, can readily occur in change or replace, should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should above-mentioned be as the criterion with scope of the claims.
Claims (10)
1. a fan decompression speed device, it is characterised in that include: the common optical coupler isolation circuit, the pulse that are sequentially connected with are whole
Shape circuit and electromotor voltage reduction speed-adjusting circuit；
Described common optical coupler isolates circuit, including common optical coupler；
Described common optical coupler isolation circuit passes through described common optical coupler, is driven described electromotor voltage reduction speed-adjusting circuit.
2. fan decompression speed device according to claim 1, it is characterised in that described common optical coupler isolates circuit, bag
Include: the first resistance, described common optical coupler and the second resistance；
One end of described first resistance is connected with voltage source, and the other end is connected with the one end on the former limit of described common optical coupler；
One end of the secondary of described common optical coupler is connected with one end of described second resistance, the other end and described pulse shaper
Connect；
The other end of described second resistance is connected with described pulse shaper.
3. fan decompression speed device according to claim 2, it is characterised in that described pulse shaper, comprising: the
One electric capacity, the second electric capacity, polarized electric capacity, the 3rd resistance, voltage-stabiliser tube and shaping pulse module；
One end of described first electric capacity is connected with direct voltage source, and the other end is grounded；
One end of described polarized electric capacity is connected with described second resistance, and the other end is grounded；
One end of described second electric capacity is connected with described shaping pulse module, and the other end is grounded；
One end of described 3rd resistance is connected with described shaping pulse module, and the other end is grounded；
The positive pole of described voltage-stabiliser tube is connected with direct voltage source, negative pole respectively with described second resistance and described shaping pulse module
Connect；
Described shaping pulse module, is also connected with the secondary of described common optical coupler.
4. fan decompression speed device according to claim 3, it is characterised in that described shaping pulse module, uses 555
Timer；
Described shaping pulse module includes eight pins, wherein, the first pin ground connection, and the second pin is with described 3rd resistance even
Connecing, the 3rd pin is connected with described electromotor voltage reduction speed-adjusting circuit, and the 4th pin and the 8th pin connect with the negative pole of described voltage-stabiliser tube respectively
Connecing, the 5th pin is connected with described second electric capacity, and the 6th pin and described second pin short circuit, the 7th pin sky connects；
Described shaping pulse module, constitutes Schmidt trigger by described 6th pin with described second pin short circuit, to institute
The impulse waveform stating common optical coupler isolation circuit output carries out shaping operation.
5. fan decompression speed device according to claim 4, it is characterised in that described electromotor voltage reduction speed-adjusting circuit, comprising: the
Five resistance, the 3rd electric capacity, the 4th electric capacity, the second diode, metal-oxide-semiconductor and inductance；
Described 5th resistance downlink connection are between the grid and drain electrode of described metal-oxide-semiconductor；
One end of described 3rd electric capacity is connected with direct voltage source, and the other end is grounded；
The positive pole of described second diode is connected with direct voltage source, and negative pole is connected with the source electrode of described metal-oxide-semiconductor；
One end of described inductance is connected with the source class of described metal-oxide-semiconductor, and the other end is connected with described 4th electric capacity；
One end of described 4th electric capacity is connected with direct voltage source, the other end and described inductance connection；
Described electromotor voltage reduction speed-adjusting circuit, is adjusted to output voltage by described metal-oxide-semiconductor.
6. fan decompression speed device according to claim 5, it is characterised in that described electromotor voltage reduction speed-adjusting circuit, also includes:
4th resistance；
One end of described 4th resistance is connected with described 3rd pin of described shaping pulse module, the other end and described metal-oxide-semiconductor
Grid connect.
7. the fan decompression speed device according to claim 5 or 6, it is characterised in that described electromotor voltage reduction speed-adjusting circuit, also
Including: the first diode；
Described first diode downlink connection are between the grid and drain electrode of described metal-oxide-semiconductor.
8. fan decompression speed device according to claim 5, it is characterised in that described metal-oxide-semiconductor employing model is
The FET of NTD20N06.
9. fan decompression speed device according to claim 1, it is characterised in that described fan decompression speed device, also
Including: secondary cell；
Described secondary cell, is connected with described common optical coupler isolation circuit, pulse shaper and electromotor voltage reduction speed-adjusting circuit respectively；
Described secondary cell, respectively described common optical coupler isolation circuit, pulse shaper and electromotor voltage reduction speed-adjusting circuit are powered.
10. a fan apparatus, it is characterised in that include fan decompression speed device described in the claims 1-9 and straight
Flow fan；
Described fan decompression speed device is connected with described DC fan, is used for controlling described DC fan.
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| CN201610819838.2A CN106230337A (en) | 2016-09-12 | 2016-09-12 | A kind of fan decompression speed device and fan apparatus |
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| CN201610819838.2A CN106230337A (en) | 2016-09-12 | 2016-09-12 | A kind of fan decompression speed device and fan apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994822A (en) * | 2017-11-21 | 2018-05-04 | 武汉奥泽电子有限公司 | A kind of PWM speed adjusting modules |
| 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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| CN203352527U (en) * | 2013-06-04 | 2013-12-18 | 史灿 | PWM speed regulation circuit |
| CN103944549A (en) * | 2014-04-03 | 2014-07-23 | 南京航空航天大学 | High-reliability MOSFET drive circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107994822A (en) * | 2017-11-21 | 2018-05-04 | 武汉奥泽电子有限公司 | A kind of PWM speed adjusting modules |
| CN107994822B (en) * | 2017-11-21 | 2020-04-10 | 武汉奥泽电子有限公司 | PWM speed regulation module |
| 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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