CN108574379A - The fan of position Sensorless Control - Google Patents
The fan of position Sensorless Control Download PDFInfo
- Publication number
- CN108574379A CN108574379A CN201710144067.6A CN201710144067A CN108574379A CN 108574379 A CN108574379 A CN 108574379A CN 201710144067 A CN201710144067 A CN 201710144067A CN 108574379 A CN108574379 A CN 108574379A
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- Prior art keywords
- fan
- coil windings
- big
- motor
- magnetic field
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- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses a kind of fans of position Sensorless Control, for automobile electronic product, scientific electronic instrument, the radiator fan that electric equipment products, household electrical appliance etc. locally radiate.Solves the problems such as friction of existing DC fan is big, loss is big, maintenance cost is high, fever is big, short life, efficiency is low, output power is small, IC is of high cost, volume is big, complicated, difficult miniaturization；It, which is noteworthy characterized by, uses following new technology：Commutator and driver of the integrated circuit DRV10963 as fan of TI are used, detection magnetic field position, driving hollow cup coil winding and fan propeller interact, and fan propeller is made to continue to rotate；The hollow-cup motor construction with prominent energy conservation characteristic, sensitive control characteristic and stable operation characteristic is used, is the developing direction of motor as efficient energy conversion device；Axial arrangement magnetic field is used, energy conversion efficiency is improved and increases torque volume ratio.
Description
Technical field
The fan for the position Sensorless Control that the present invention is sent out is applied to computer, LED, automotive-type electricity
Sub- product, scientific electronic instrument, the equipment such as civil aviation equipment, portable device, 3D printing part cooling fan motor.
Background technology
Existing DC fan, motor structure are constructed using conventional iron core motor, driving circuit mainly by
Single Hall IC and coil windings composition, magnetic field is using radial magnetic field, although at present with extensively, there is also very much
Disadvantage：The construction of iron core keeps big fan motor stator volume, 30% or more weight increase, mechanical energy losses more, core material
So that fan motor is had magnetic damping and iron loss, increase motor driving power, iron loss pyrotoxin, so that motor is become power consumption big.
Single Hall IC and coil windings form fan motor driving circuit, and the waveform of output is rectangular wave, commutate in motor in Hall
When easy to produce electromagnetic noise.The startup response time is slow, and operation characteristic is not very stable, and the service life is caused to reduce.Radial magnetic
Field structure designs, energy conversion efficiency very low and torque volume ratio increase small be unfavorable for doing it is ultra-thin.Light-duty fan.
What it is with electronic product is all toward ultralight, thin, miniature development, so that size, volume, the weight of fan motor
Also must be past ultralight, thin, miniature to development, the Novel DC fan motor of this practicality overcomes prior art defect.Make
Fan motor is more energy efficient, easy to control, small, thin, and moyor improves 50%.And the construction of fan electromotor is made to become with letter
Single
Invention content
In order to overcome the shortage of prior art place, the fan for the position Sensorless Control that the present invention is sent out.Solution
It has determined and has overcome the problems such as existing fan motor volume is big, weight weight, power consumption are big, electromagnetic noise, efficiency are low, low-response cost,
The Novel DC fan motor of this practicality by：
1 outline border, 2 bearings, 7 then plates；8 driving circuit PCBA；9 coreless cup coil windings；10 axis support plates；11 wear-resistant pads
Piece；12 screws；13 buckles；The fan stator and 3 impellers of 14 harness composition；4 axis；5 magnet steel iron plates；The fan of 6 magnet composition turns
Son composition.Use following new technology：
1, the stator motor part of fan motor uses coreless cup construction, eliminates iron core, feature：Energy conservation characteristic is excellent
Good, energy conversion efficiency is up to 90% very much；It is easy to control：It starting, brakes rapidly, response is exceedingly fast, in addition, drag cup fan motor
Energy density increases substantially, and same weight/power ratio, volume mitigate 1/3.
2, the stator motor driving circuit PCBA of fan motor, 9 coreless cup coil windings of driving generate magnetic field and turn with fan
Son interaction, makes fan propeller rotate, and generates air quantity and utilizes Based on Back-EMF Method, by detecting winding back emf (Back
Electromotive Force, hereinafter referred to as Back-EMF) obtain rotor-position signal；Loop diagram is shown in attached drawing 1, uses
Drivers of the IC DRV10963 of Texas Instrument (TI) as fan motor, IC DRV10963 are three-phase position-sensor-free electricity
Machine driver.The device drives application specifically for the motor of efficient, low noise and low outer set number of packages and designs.It is characterized in that
The sinusoidal controlling mechanism of 180 ° of proprietary no sensor without window, current limit and short circuit current protection, lock-in detection, voltage surge are protected
It protects (AVS), undervoltage lockout (UVLO), Thermal shutdown.
3. fan motor driving circuit uses position Sensorless Control mode.Hall element is eliminated, is reduced into
This, reduces the volume of fan motor；Strong antijamming capability；Reduce the technology difficulty of fan motor production；Control circuit is simple.
Its operation principle of the fan for the position Sensorless Control that the present invention is sent out is：Refer to Novel DC fan not
It being mounted directly Hall element, but in fan motor operation process, the rotor-position signal of control motor commutation is still needed,
And the present invention be exactly utilize Based on Back-EMF Method, by detect winding back emf (Back Electromotive Force, hereinafter referred to as
Back-EMF) rotor-position signal is obtained.In brushless DC fan, the back-emf of winding is typically positive and negative alternation, when
When the back-emf zero passage of certain phase winding, rotor d-axis is overlapped with the phase winding axis just, as long as therefore detecting each opposite electricity
The zero crossing of gesture, so that it may which several key positions for knowing rotor realize nothing to save rotor-position sensor Hall element
Position sensor controls fan.This is current most widely used method for controlling position-less sensor.
Compared with prior art, the driving that the present invention forms coreless cup coil windings, DRV10963 position-sensor-frees
Circuit applies on DC brushless fan motor, its main feature is that more energy efficient, easy to control and reliability is high stable；And there is pole
Strong anti-interference ability；The service life of motor is set to improve.The implementation of the present invention reduces cost, the production technology of fan
Become simple；The volume of fan is reduced, does not have the micro computer, PAD, unmanned plane etc. of strict demand to carry space, weight, energy consumption
Superior heat radiation solution is supplied.
Description of the drawings：
Fig. 1 is the D. C. brushless fan driving circuit schematic diagram of position Sensorless Control.
Fig. 2 is the fan PCB layout figure of position Sensorless Control.
Fig. 3 is the fan stator motor component and coil position schematic diagram of position Sensorless Control.
Fig. 4 is the organigram of the fan of position Sensorless Control.
Specific implementation mode
[embodiment 1] below by way of examples and with reference to the accompanying drawings 1, Fig. 2, Fig. 3 to the direct current of position Sensorless Control without
Brush fan further illustrates.
[embodiment 1]
1,3 impeller；4 axis；The impeller assembly of 5 magnet steel yoke plates composition, 6 magnet steel are sticked on impeller assembly；By magnetizing, moves and put down
After weighing apparatus is adjusted, rotor is formed.Stable magnetic field is provided for fan rotation.
3,7 then plate 1PCS；9 coreless cup coil windings；8 driving circuit PCBA；14 harness form stator driving component；Often
3 coil windings, 120 ° of the center angle of each coil windings, each coil windings center line are installed on a stator module
A is overlapped with the magnetic field center of magnet steel.Ensure that energy conversion efficiency reaches maximization.As shown in Figure 3.The work of stator driving component
With being that driving coil winding generates magnetic field and rotor field and interacts fan motor is made to continue to rotate, using with Based on Back-EMF Method,
Rotor-position signal is obtained by detecting winding back emf.
4,2 bearings are pressed into 1 casing；Stator driving component is packed into 1 casing again, is used in combination 14 screws to fix, rotor is inserted
Enter in 2 bearing centre holes, blocks upper 13 retainer ring, prevent rotor from falling off.12 axis for having put 13 gaskets well are finally caught in 1 machine by plate
The fan of shell, such position Sensorless Control just completes.As shown in Figure 4.
Specific embodiment described herein only illustrates the present invention.The technical field of the invention
Technical staff can do various modifications or additions or substitute by a similar method to described specific embodiment,
But without departing from the present invention or beyond the scope of the appended claims.
Claims (1)
1. the fan of position Sensorless Control by：1 outline border, 2 bearings, 7 then plates；8 driving circuit PCBA；9 is empty
Core cup coil windings；10 axis support plates；11 wear-resistant gaskets；12 screws；13 buckles；The fan stator and 3 impellers of 14 harness composition；
4 axis；5 magnet steel iron plates；The fan propeller composition of 6 magnet composition；It is characterized in that：Stator motor part uses coreless cup construction,
Coil windings are coreless cup windings, shown in Fig. 3, use the IC DRV10963 three-phases of Texas Instrument (TI) without sensor conduct
The driver of fan motor, driving fan motor rotor persistently rotate, using with Based on Back-EMF Method, by detect winding back emf come
Rotor-position signal is obtained, 3 coil windings are installed on each stator module, the center angle of 3 coil windings is
120 °, the magnetic field center coincidence A of 3 coil windings center lines and magnet steel ensures that energy conversion efficiency reaches maximization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710144067.6A CN108574379A (en) | 2017-03-10 | 2017-03-10 | The fan of position Sensorless Control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710144067.6A CN108574379A (en) | 2017-03-10 | 2017-03-10 | The fan of position Sensorless Control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108574379A true CN108574379A (en) | 2018-09-25 |
Family
ID=63578039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710144067.6A Pending CN108574379A (en) | 2017-03-10 | 2017-03-10 | The fan of position Sensorless Control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108574379A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113503266A (en) * | 2021-05-31 | 2021-10-15 | 阜南县特立电子有限公司 | Direct current fan control system and direct current fan |
-
2017
- 2017-03-10 CN CN201710144067.6A patent/CN108574379A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113503266A (en) * | 2021-05-31 | 2021-10-15 | 阜南县特立电子有限公司 | Direct current fan control system and direct current fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DD01 | Delivery of document by public notice |
Addressee: Shanghai Ying day mechanical & Electrical Equipment Co., Ltd. Document name: Notification of Passing Preliminary Examination of the Application for Invention |
|
| DD01 | Delivery of document by public notice | ||
| PB01 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Shanghai Ying day mechanical & Electrical Equipment Co., Ltd. Document name: Notification of Publication of the Application for Invention |
|
| DD01 | Delivery of document by public notice | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180925 |
|
| WD01 | Invention patent application deemed withdrawn after publication |