CN106996383A - The brushless fan and its control mode of a kind of built-in drive - Google Patents
The brushless fan and its control mode of a kind of built-in drive Download PDFInfo
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- CN106996383A CN106996383A CN201710334593.9A CN201710334593A CN106996383A CN 106996383 A CN106996383 A CN 106996383A CN 201710334593 A CN201710334593 A CN 201710334593A CN 106996383 A CN106996383 A CN 106996383A
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- 238000001514 detection method Methods 0.000 claims abstract description 28
- 230000011664 signaling Effects 0.000 claims description 10
- 239000004065 semiconductor Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 10
- NMWSKOLWZZWHPL-UHFFFAOYSA-N 3-chlorobiphenyl Chemical compound ClC1=CC=CC(C=2C=CC=CC=2)=C1 NMWSKOLWZZWHPL-UHFFFAOYSA-N 0.000 description 6
- 101001082832 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) Pyruvate carboxylase 2 Proteins 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 206010011409 Cross infection Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/584—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling or heating the machine
Abstract
The present invention relates to a kind of brushless fan of built-in drive and its control mode, mainly solve brushless fan in existing hand dryer and there is the problem of air-out is slow, stability is poor, space-consuming is big and driver heating is serious.The brushless fan of described built-in drive, it includes fan body and driver, the fan body includes Blower Housing and the electric machine assembly being arranged in Blower Housing, driver is arranged inside Blower Housing, fan body also includes the air-out component for being arranged at Blower Housing top, and air-out component includes the wind wheel being engaged, lid, air-out lower cover and air-out support in air-out；Signal circuit generates enabling signal according to outside working signal, and pwm control circuit generates control signal according to the enabling signal received, and control signal is passed into drive circuit, motor detection circuit and temperature sensing circuit.The brushless fan of the built-in drive is simple and reasonable, practical and convenient, operates steadily, and service life is long.
Description
Technical field
The present invention relates to sanitary equipment technical field of electric appliances, and in particular to the brushless fan and its controlling party of a kind of built-in drive
Formula.
Background technology
Hand dryer is with drying both hands or to dry up the sanitary equipment electrical equipment of both hands between a kind of bathroom, is divided into the automatic dry hand of induction type
Device and manual hand dryer.It mainly applies to defending for hotel, restaurant, scientific research institution, hospital, place of public amusement and each family
Between life etc..Blower fan and heater are provided with hand dryer, after washing one's hands, hand is stretched at the air outlet of hand dryer, hand dryer meeting
Automatically comfortable warm wind is sent out, hand is dried rapidly, and when hand is left at the air outlet of hand dryer, hand dryer can automatic blowing-out
Shutdown, without using towel moisture on hand, can prevent cross infection of disease.
But existing hand dryer has out wind velocity slowly due to internal brushless fan, go out wind stability deficiency, wind
There is fluctuation in power size so that user needs the long period to be dried, and then influence user experience, while existing nothing
Brush blower fan and corresponding variable frequency drives are separately separately installed, and space-consuming is larger, and the heating of driver generally existing is tight
The problem of weight, cause driver service life to shorten, have a strong impact on the normal of hand dryer and use, thus existing hand dryer is entered
Row improvement is very important.
The content of the invention
In order to overcome the shortcomings of background technology, the present invention provides the brushless fan and its controlling party of a kind of built-in drive
Formula, mainly solves brushless fan in existing hand dryer and exists that air-out is slow, stability is poor, space-consuming is big and driver heating
The problem of serious, the brushless fan of the built-in drive is simple and reasonable, by wind wheel, air-out support, air-out lower cover and goes out
Cover and cooperate on wind, make wind under the guiding compacting of guide protrusions I, guide protrusions II and guide pad from round wind outlet blowout,
And then the speed and stability of air-out are improved, while driver is arranged inside brushless fan, space-consuming is reduced, and utilize
Air circulation during blower fan work radiates to driver, effectively extends the service life of driver, greatly improves nothing
The overall performance of brush blower fan, it is practical and convenient, operate steadily, service life is long, it is easy to promote.
The technical solution adopted in the present invention is：A kind of brushless fan of built-in drive, includes fan body and drive
Dynamic device, the fan body includes Blower Housing and the electric machine assembly being arranged in Blower Housing, and driver is arranged at wind
Machine enclosure interior, driver, which includes, is provided with mutual cooperation in the PCB for being fixedly connected with Blower Housing, PCB
Power circuit, signal circuit, pwm control circuit, drive circuit, three-phase inversion bridge circuit and motor detection circuit, blower fan sheet
Body also includes the air-out component for being arranged at Blower Housing top, and air-out component includes the wind wheel being engaged, covers in air-out, goes out
Wind lower cover and air-out support, are provided with the guide protrusions I and guide protrusions II being distributed around wind wheel in swirl shape on lid under air-out,
It is provided with the air-out of round wind outlet and covers on lid under air-out, annular air is intraoral is evenly distributed with guide pad；
The PCB generally circular configuration is set and the center is provided with manhole, PCB and is provided with
Temperature sensing circuit is additionally provided with the fin of circular arc, PCB；
The pwm control circuit respectively with described power circuit, signal circuit, drive circuit, three-phase inversion bridge circuit, motor
Detection circuit and temperature sensing circuit are electrically connected to each other, and pwm control circuit, which is provided with PWM, to be occurred on chip U2, power circuit
The rectification voltage reduction module, 300V supply voltages and 12V supply voltages of mutual cooperation are provided with, signal circuit is provided with to be sent out with PWM
Signaling interface J3 and triode Q1 that raw chip is electrically connected to each other, signal circuit are additionally provided with voltage-stablizer U1 and corresponding 5V electricity
Source voltage VCC, drive circuit includes driving chip U3, U4, U5, diode D1, D2, D3, electric capacity C8, C10, C12, electrolysis electricity
Hold C9, C11, C13, resistance R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, driving chip U3, U4,
U5 power end connection 12V supply voltages, three-phase inverter bridge circuit include motor interface J4, J5, J6, metal-oxide-semiconductor Q2, Q3,
Q4, Q5, Q6, Q7, resistance R19, R20, R21, R22, R23, R24, R25, R26, R27, electric capacity C14, C23, metal-oxide-semiconductor Q2, Q4, Q6
Drain electrode be all connected to 12V supply voltages, metal-oxide-semiconductor Q2, Q3, Q4, Q5, Q6, Q7 are respectively fixedly connected with described fin, electricity
Machine examination slowdown monitoring circuit include Hall sensor U6, U7, U8, resistance R28, R29, R30, R31, R32, R33, electric capacity C15, C16,
Resistance R5 and thermistor R6 is set on C17, temperature sensing circuit；
The electric machine assembly includes stator, rotor, rotating shaft and the described driver of mutual cooperation, and stator includes phase interworking
The coil rack and coil windings of conjunction, coil windings are electrically connected to each other with driver, and rotating shaft upper and lower ends are respectively fixedly connected with
Be arranged with described wind wheel and rotor, rotating shaft outside the rotating shaft set and two bearings being engaged, two bearings be arranged with it is matched
Bearing holder (housing, cover), bearing holder (housing, cover) top, which is provided with outside the snap ring being engaged with bearing, bearing holder (housing, cover), to be also arranged with below the wind wheel
Air-out support；
Wind deflector and the blade being uniformly distributed on wind deflector are provided with the wind wheel, the lateral cross section of wind deflector is arc
Circular groove is provided with the middle part of structure setting, wind wheel, the center of circular groove is provided with the rotating shaft being adapted with the rotating shaft
Described air-out lower cover is arranged with outside through hole, wind wheel, air-out lower cover is mutually permanently connected with lid in air-out, set in air-out on lid
Have respectively with the guide protrusions I and guide protrusions II the guide groove I being adapted and guide groove II, cover side in air-out and be provided with
Boss is evenly distributed with bulge-structure, bulge-structure；
The Blower Housing lower end is provided with the blower fan cover plate for being secured to connection, Blower Housing and is provided with and the bearing holder (housing, cover)
The stator corresponding with the stator is provided with the downside of corresponding fixed support, fixed support raised, is set on the downside of Blower Housing
It is equipped with air inlet I, blower fan cover plate and is provided with air inlet II and air inlet III.
A kind of control method of the brushless fan based on built-in drive, comprises the following steps：
（1）To the power circuit set on driver, signal circuit, pwm control circuit, drive circuit, three-phase inversion bridge circuit,
Motor detection circuit and temperature sensing circuit carry out Initialize installation；
（2）Signal circuit generates enabling signal according to outside working signal, and pwm control circuit is given birth to according to the enabling signal received
Drive circuit, motor detection circuit and temperature sensing circuit are passed into control signal, and by control signal；
（3）Drive circuit, motor detection circuit and temperature sensing circuit are performed to the control signal of pwm control circuit respectively
Operate, motor detection circuit is detected to the position in rotor rotation process, and according to the position of rotor-position generation rotor
Signal is passed back to pwm control circuit, and temperature sensing circuit generates temperature signal according to internal drive temperature, and by temperature signal
It is delivered to pwm control circuit；
Wherein, control signal is divided into pwm signal, position signalling and temperature signal, pwm signal, position signalling and temperature signal point
Other that drive circuit, motor detection circuit and temperature sensing circuit are controlled, the quantity of pwm signal is set to 3 groups；Start letter
Number it is divided into run signal, rate signal and return signal, run signal is used to control running status, and rate signal is used to control to turn
Dynamic speed, return signal is used for Returning driver state；
The following steps that the drive circuit includes：
12V supply voltages make driving chip U3, U4, U5 normal work, and drive circuit carries out power amplification to pwm signal, and defeated
Go out the inverter signal being engaged and thermal compensation signal；
The following steps that the three-phase inversion bridge circuit includes：
Three-phase inversion bridge circuit carries out inversion output AC voltage to 300V supply voltages according to inverter signal and thermal compensation signal, and
Alternating voltage, which is delivered in stator, makes stator produce orderly magnetic field, and then rotor is rotated in magnetic field.
The beneficial effects of the invention are as follows：Due to taking above-mentioned technical proposal, the brushless fan structure letter of the built-in drive
It is single reasonable, cooperated by being covered in wind wheel, air-out support, air-out lower cover and air-out, make wind in guide protrusions I, guide protrusions
From round wind outlet blowout under II and guide pad guiding compacting, and then the speed and stability of air-out are improved, while by driver
It is arranged inside brushless fan, reduces space-consuming, and driver is radiated using air circulation during blower fan work, has
Effect extends the service life of driver, greatly improves the overall performance of brushless fan, practical and convenient, operates steadily, uses
Long lifespan, it is easy to promote.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Fig. 2 is front view of the invention.
Fig. 3 is the profile at A-A in Fig. 2.
Fig. 4 is the schematic diagram of wind wheel 9 in Fig. 3.
Fig. 5 is the schematic diagram of air-out lower cover 11 in Fig. 3.
Fig. 6 is the schematic diagram of Blower Housing 1 in Fig. 3.
Fig. 7 is the theory diagram of PCB 2 in Fig. 3.
Fig. 8 is the schematic diagram of signal circuit 4 in Fig. 7.
Fig. 9 is the schematic diagram of pwm control circuit 5 in Fig. 7.
Figure 10 is the schematic diagram of drive circuit 6 in Fig. 7.
Figure 11 is the schematic diagram of three-phase inversion bridge circuit 7 in Fig. 7.
Figure 12 is the schematic diagram of motor detection circuit 8 in Fig. 7.
Figure 13 is the schematic diagram of temperature sensing circuit 18 in Fig. 7.
1, Blower Housing in figure；2nd, PCB；3rd, power circuit；4th, signal circuit；5th, pwm control circuit；6th, drive
Circuit；7th, three-phase inversion bridge circuit；8th, motor detection circuit；9th, wind wheel；10th, covered in air-out；11st, air-out lower cover；12nd, air-out branch
Frame；13rd, guide protrusions I；14th, guide protrusions II；15th, round wind outlet；16th, guide pad；17th, fin；18th, temperature detection electricity
Road；19th, rotor；20th, rotating shaft；21st, coil rack；22nd, coil windings；23rd, rotating shaft set；24th, bearing；25th, bearing holder (housing, cover)；26th, block
Ring；27th, wind deflector；28th, blade；29th, circular groove；30th, rotating shaft through hole；31st, bulge-structure；32nd, boss；33rd, fan cover
Plate；34th, fixed support；35th, stator is raised；36th, air inlet I；37th, air inlet II；38th, air inlet III.
Embodiment
Embodiments of the present invention is further illustrated below in conjunction with the accompanying drawings：
As shown in Fig. 1 to Figure 13, a kind of brushless fan of built-in drive, it includes fan body and driver, the wind
The electric machine assembly that machine body includes Blower Housing 1 and is arranged in Blower Housing 1, driver is arranged in Blower Housing 1
Air when portion is worked using fan body constantly circulation driver is quickly radiated, effectively extend making for driver
With the life-span, driver includes is provided with mutual cooperation in the PCB 2 for being fixedly connected with Blower Housing 1, PCB 2
Power circuit 3, signal circuit 4, pwm control circuit 5, drive circuit 6, three-phase inversion bridge circuit 7 and motor detection circuit 8,
Fan body also includes the air-out component for being arranged at the top of Blower Housing 1, and air-out component includes the wind wheel 9 being engaged, gone out
The guiding being distributed around wind wheel 9 in swirl shape is provided with wind on lid 10, air-out lower cover 11 and air-out support 12, air-out lower cover 11
Raised I 13 and guide protrusions II 14, guide protrusions I 13 and guide protrusions II 14 are in wicker leaf shape structure setting, guide protrusions I
The wind that 13 and guide protrusions II 14 is produced to wind wheel 9 is guided and suppressed, and round wind outlet is provided with air-out lower cover 11
Guide pad 16 is evenly distributed with lid 10 in 15 air-out, round wind outlet 15, guide pad 16 is set for arcuate structure, wind wheel 9
The wind for making generation using aeroengine and turbo charged principle is blown out from round wind outlet 15, improves wind speed and stability.
The PCB 2 generally circular configuration is set and the center is provided with manhole, PCB 2
The fin 17 of circular arc is provided with, fin 17, which is improved, is additionally provided with temperature inspection in the thermal diffusivity of driver, PCB 2
Slowdown monitoring circuit 18.
The pwm control circuit 5 respectively with described power circuit 3, signal circuit 4, drive circuit 6, three phase inverter bridge
Circuit 7, motor detection circuit 8 and temperature sensing circuit 18 are electrically connected to each other, and pwm control circuit 5 is provided with PWM and occurs chip
The rectification voltage reduction module, 300V supply voltages and 12V supply voltages of mutual cooperation, signal circuit are provided with U2, power circuit 3
4 are provided with the signaling interface J3 and triode Q1 being electrically connected to each other with PWM generation chips, and signal circuit 4 is additionally provided with voltage stabilizing
Device U1 and corresponding 5V supply voltages VCC, drive circuit 6 includes driving chip U3, U4, U5, diode D1, D2, D3, electric capacity
C8, C10, C12, electrochemical capacitor C9, C11, C13, resistance R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17,
R18, driving chip U3, U4, U5 power end connection 12V supply voltages, three-phase inverter bridge circuit include motor interface J4,
J5, J6, metal-oxide-semiconductor Q2, Q3, Q4, Q5, Q6, Q7, resistance R19, R20, R21, R22, R23, R24, R25, R26, R27, electric capacity C14,
C23, metal-oxide-semiconductor Q2, Q4, Q6 drain electrode are all connected to 12V supply voltages, and metal-oxide-semiconductor Q2, Q3, Q4, Q5, Q6, Q7 are respectively fixedly connected with
In described fin 17, motor detection circuit 8 include Hall sensor U6, U7, U8, resistance R28, R29, R30, R31,
R32, R33, electric capacity C15, C16, C17, Hall sensor U6, U7, U8 detect to the position of rotor, temperature sensing circuit 18
Upper setting resistance R5 and thermistor R6.
The electric machine assembly includes the stator of mutual cooperation, rotor 19, rotating shaft 20 and described driver, and stator includes
There are the coil rack 21 and coil windings 22 of mutual cooperation, coil windings 22 are electrically connected to each other with driver, driver control
Coil windings 22 produce the magnetic field being continually changing, and the upper and lower ends of rotating shaft 20 are respectively fixedly connected with described wind wheel 9 and rotor 19, turn
The rotating shaft set 23 and two bearings 24 being engaged are arranged with axle 20, rotating shaft set 23 is protected with the countershaft 20 of two bearings 24, two
Matched bearing holder (housing, cover) 25 is arranged with outside bearing 24, the top of bearing holder (housing, cover) 25 is provided with the snap ring 26 being engaged with bearing 24,
Snap ring 26 is used to prevent the position of bearing 24 from shifting, the outer air-out being also arranged with positioned at the lower section of wind wheel 9 of bearing holder (housing, cover) 25
Support 12.
The blade 28 for being provided with wind deflector 27 on the wind wheel 9 and being uniformly distributed on wind deflector 27, wind deflector 27
Lateral cross section is set for arcuate structure, and the middle part of wind wheel 9 is provided with circular groove 29, and the center of circular groove 29 is provided with and institute
State and described air-out lower cover 11 is arranged with outside the rotating shaft through hole 30 that rotating shaft 20 is adapted, wind wheel 9, air-out lower cover 11 in air-out with covering
10 are mutually permanently connected, and are provided with and are adapted respectively with the guide protrusions I 13 and guide protrusions II 14 on lid 10 in air-out
Guide groove I and guide groove II, the upside of lid 10, which is provided with bulge-structure 31, bulge-structure 31, in air-out is evenly distributed with reinforcement
Block 32.
The lower end of Blower Housing 1 is provided with the blower fan cover plate 33 for being secured to connection, Blower Housing 1 and is provided with and institute
The corresponding fixed support 34 of bearing holder (housing, cover) 25 is stated, it is raised that the downside of fixed support 34 is provided with the stator corresponding with the stator
35, the downside of Blower Housing 1, which is provided with air inlet I 36, blower fan cover plate 33, is provided with air inlet II 38 and air inlet III 39.
A kind of control method of the brushless fan based on built-in drive, comprises the following steps：
（1）To the power circuit 3 set on driver, signal circuit 4, pwm control circuit 5, drive circuit 6, three phase inverter bridge
Circuit 7, motor detection circuit 8 and temperature sensing circuit 18 carry out Initialize installation, the output 300V supply voltages of power circuit 3 and
12V supply voltages；
（2）Signal circuit 4 is according to outside working signal（The signal that controller outside fan body is produced）Generate enabling signal,
Pwm control circuit 5 generates control signal according to the enabling signal received, and control signal is passed into drive circuit 6, motor
Detect circuit 8 and temperature sensing circuit 18；
（3）The control signal of drive circuit 6, motor detection circuit 8 and temperature sensing circuit 18 respectively to pwm control circuit 5 is entered
Row performs operation, and 12V supply voltages make driving chip U3, U4, U5 normal work, and drive circuit 6 carries out power to pwm signal and put
Greatly, and the inverter signal that is engaged and thermal compensation signal are exported, thermal compensation signal is repaiied to the deviation produced during power amplification
Positive compensation improves the accuracy of inverter signal；Three-phase inversion bridge circuit 7 is according to inverter signal and thermal compensation signal to 300V power supplys electricity
Pressure carries out inversion output AC voltage, and alternating voltage, which is delivered in stator, makes stator produce orderly magnetic field, and then makes rotor
19 rotate in magnetic field；Motor detection circuit 8 detects to the position in the rotation process of rotor 19, and according to rotor 19
The position signalling that position produces rotor 19 is passed back to pwm control circuit 5, and temperature sensing circuit 18 is given birth to according to internal drive temperature
Pwm control circuit 5 is delivered into temperature signal, and by temperature signal；Pwm control circuit 5 is examined to motor detection circuit 8 and temperature
The signal that slowdown monitoring circuit 18 is fed back to is analyzed and processed, and exports new pwm signal.
Wherein, control signal is divided into pwm signal, position signalling and temperature signal, pwm signal, position signalling and temperature letter
Number drive circuit 6, motor detection circuit 8 and temperature sensing circuit 18 are controlled respectively, the quantity of pwm signal is set to 3
Group；Enabling signal is divided into run signal, rate signal and return signal, and run signal is used to control running status, rate signal
For controlling velocity of rotation, return signal is used for Returning driver state.
The brushless fan of the built-in drive is simple and reasonable, passes through wind wheel 9, air-out support 12, the and of air-out lower cover 11
Lid 10 cooperates in air-out, makes wind under the guiding compacting of guide protrusions I 13, guide protrusions II 14 and guide pad 16 from annular
Air outlet 15 is blown out, and then improves the speed and stability of air-out, while driver is arranged inside brushless fan, reduction is accounted for
With space, and driver is radiated using air circulation during blower fan work, effectively extends the service life of driver,
The overall performance of brushless fan is greatly improved, it is practical and convenient, operate steadily, service life is long, it is easy to promote.
Every technical staff's notice：Although the present invention is described according to above-mentioned embodiment, of the invention
Invention thought be not limited to that invention, the repacking of any utilization inventive concept will all include this patent protection of the patent right
In the range of.
Claims (9)
1. a kind of brushless fan of built-in drive, includes fan body and driver, it is characterised in that：The fan body
Include Blower Housing and the electric machine assembly being arranged in Blower Housing, driver is arranged inside Blower Housing, driver
Include the power circuit that mutual cooperation is provided with the PCB for being fixedly connected with Blower Housing, PCB, signal electricity
Road, pwm control circuit, drive circuit, three-phase inversion bridge circuit and motor detection circuit, fan body, which also includes, is arranged at wind
The air-out component of machine housing upper, air-out component includes the wind wheel being engaged, lid, air-out lower cover and air-out support in air-out,
The guide protrusions I and guide protrusions II being distributed around wind wheel in swirl shape are provided with air-out on lid, band is set on lid under air-out
Have and covered in the air-out of round wind outlet, annular air is intraoral to be evenly distributed with guide pad.
2. a kind of brushless fan of built-in drive according to claim 1, it is characterised in that：The PCB is whole
Body is that circular configuration is set and the center is provided with the fin that circular arc is provided with manhole, PCB, PCB
Temperature sensing circuit is additionally provided with circuit board.
3. a kind of brushless fan of built-in drive according to claim 2, it is characterised in that：The pwm control circuit
Respectively with described power circuit, signal circuit, drive circuit, three-phase inversion bridge circuit, motor detection circuit and temperature detection
Circuit is electrically connected to each other, and pwm control circuit, which is provided with PWM, to be occurred to be provided with the whole of mutual cooperation on chip U2, power circuit
Voltage reduction module, 300V supply voltages and 12V supply voltages are flowed, signal circuit is provided with to be electrically connected to each other with PWM generation chips
Signaling interface J3 and triode Q1, signal circuit is additionally provided with voltage-stablizer U1 and corresponding 5V supply voltages VCC, drive circuit
Include driving chip U3, U4, U5, diode D1, D2, D3, electric capacity C8, C10, C12, electrochemical capacitor C9, C11, C13, resistance
R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, driving chip U3, U4, U5 power end connection
12V supply voltages, three-phase inverter bridge circuit includes motor interface J4, J5, J6, metal-oxide-semiconductor Q2, Q3, Q4, Q5, Q6, Q7, resistance
R19, R20, R21, R22, R23, R24, R25, R26, R27, electric capacity C14, C23, metal-oxide-semiconductor Q2, Q4, Q6 drain electrode are all connected to
12V supply voltages, metal-oxide-semiconductor Q2, Q3, Q4, Q5, Q6, Q7 are respectively fixedly connected with described fin, and motor detection circuit includes
There are Hall sensor U6, U7, U8, resistance R28, R29, R30, R31, R32, R33, electric capacity C15, C16, C17, temperature sensing circuit
Upper setting resistance R5 and thermistor R6.
4. a kind of brushless fan of built-in drive according to claim 1, it is characterised in that：The electric machine assembly includes
Have stator, rotor, rotating shaft and the described driver of mutual cooperation, stator include the coil rack and coil of mutual cooperation around
Group, coil windings are electrically connected to each other with driver, and rotating shaft upper and lower ends are respectively fixedly connected with described wind wheel and rotor, rotating shaft
On be arranged with outside the rotating shaft set and two bearings being engaged, two bearings and be arranged with matched bearing holder (housing, cover), bearing holder (housing, cover) top is set
It is equipped with the air-out support being also arranged with outside the snap ring being engaged with bearing, bearing holder (housing, cover) below the wind wheel.
5. a kind of brushless fan of built-in drive according to claim 4, it is characterised in that：It is provided with the wind wheel
Wind deflector and the blade being uniformly distributed on wind deflector, the lateral cross section of wind deflector are set for arcuate structure, are set in the middle part of wind wheel
Circular groove is equipped with, the center of circular groove is provided with outside the rotating shaft through hole being adapted with the rotating shaft, wind wheel and is arranged with institute
The air-out lower cover stated, air-out lower cover with air-out lid be mutually permanently connected, in air-out lid on be provided with respectively with it is described be oriented to it is convex
Rise and cover side in I and guide protrusions II the guide groove I and guide groove II that are adapted, air-out and be provided with bulge-structure, bulge-structure
On be evenly distributed with boss.
6. a kind of brushless fan of built-in drive according to claim 4, it is characterised in that：The Blower Housing lower end
It is provided with the blower fan cover plate for being secured to connection, Blower Housing and is provided with the fixed support corresponding with the bearing holder (housing, cover), Gu
The stator corresponding with the stator is provided with the downside of fixed rack raised, air inlet I, blower fan cover plate are provided with the downside of Blower Housing
On be provided with air inlet II and air inlet III.
7. a kind of control method of the brushless fan based on built-in drive, it is characterised in that comprise the following steps：
（1）To the power circuit set on driver, signal circuit, pwm control circuit, drive circuit, three-phase inversion bridge circuit,
Motor detection circuit and temperature sensing circuit carry out Initialize installation；
（2）Signal circuit generates enabling signal according to outside working signal, and pwm control circuit is given birth to according to the enabling signal received
Drive circuit, motor detection circuit and temperature sensing circuit are passed into control signal, and by control signal；
（3）Drive circuit, motor detection circuit and temperature sensing circuit are performed to the control signal of pwm control circuit respectively
Operate, motor detection circuit is detected to the position in rotor rotation process, and according to the position of rotor-position generation rotor
Signal is passed back to pwm control circuit, and temperature sensing circuit generates temperature signal according to internal drive temperature, and by temperature signal
It is delivered to pwm control circuit；
Wherein, control signal is divided into pwm signal, position signalling and temperature signal, pwm signal, position signalling and temperature signal point
Other that drive circuit, motor detection circuit and temperature sensing circuit are controlled, the quantity of pwm signal is set to 3 groups；Start letter
Number it is divided into run signal, rate signal and return signal, run signal is used to control running status, and rate signal is used to control to turn
Dynamic speed, return signal is used for Returning driver state.
8. the control method of the brushless fan according to claim 7 based on built-in drive, it is characterised in that the drive
The following steps that dynamic circuit includes：
12V supply voltages make driving chip U3, U4, U5 normal work, and drive circuit carries out power amplification to pwm signal, and defeated
Go out the inverter signal being engaged and thermal compensation signal.
9. the control method of the brushless fan according to claim 7 based on built-in drive, it is characterised in that described three
The following steps that phase inversion bridge circuit includes：
Three-phase inversion bridge circuit carries out inversion output AC voltage to 300V supply voltages according to inverter signal and thermal compensation signal, and
Alternating voltage, which is delivered in stator, makes stator produce orderly magnetic field, and then rotor is rotated in magnetic field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710334593.9A CN106996383A (en) | 2017-05-12 | 2017-05-12 | The brushless fan and its control mode of a kind of built-in drive |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710334593.9A CN106996383A (en) | 2017-05-12 | 2017-05-12 | The brushless fan and its control mode of a kind of built-in drive |
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| CN106996383A true CN106996383A (en) | 2017-08-01 |
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| CN201710334593.9A Pending CN106996383A (en) | 2017-05-12 | 2017-05-12 | The brushless fan and its control mode of a kind of built-in drive |
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