CN106300855B - A kind of disc type iron core-free direct current generator - Google Patents
A kind of disc type iron core-free direct current generator Download PDFInfo
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- CN106300855B CN106300855B CN201610783246.XA CN201610783246A CN106300855B CN 106300855 B CN106300855 B CN 106300855B CN 201610783246 A CN201610783246 A CN 201610783246A CN 106300855 B CN106300855 B CN 106300855B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
Abstract
The invention discloses a kind of disc type iron core-free direct current generators, including axis, first bearing is successively cased on the axis, stator disc and second bearing, the first rotor disk and the second rotor disk are cased in first bearing and second bearing respectively, the first groove is respectively equipped on the inside of the first rotor disk and the second rotor disk, permanent magnet is installed in first groove, it is fixedly connected on the outside of the first rotor disk with sun gear gear ring, pass through sun gear gear ring output torque, the stator disc is equipped with the pyriform hole for being used to install coil of several annular spreads, coil is fixed in pyriform hole by limiting device, coil is connect with the core of a cable transmitted for electric power and signal.Disc type iron core-free direct current generator of the invention, electric property is superior, due also to using iron-free cored structure, no-load current very little and without magnetic hysteresis resistance is installed in wheel hub, can not have to installation freewheel clutch, be conducive to the installation accuracy for improving planetary gear set.
Description
Technical field
The present invention relates to disc type iron core-free direct current generators, belong to the driving motor field of electric bicycle.
Background technique
Existing electric bicycle mostly uses low speed hub motor, the advantage is that: power of motor is big, motor is generally not necessarily to
Maintenance, transmission efficiency is high, but since this motor is there are magnetic hysteresis resistance, weakens or even lose the function of riding of electric bicycle
Can, electric boosted type bicycle has gradually gone on the development course of motorized easypro formula, driving motor power and travel speed
Remote super existing national standard.Motorized electric bicycle, traffic accident take place frequently, it has also become the society that one kind need solve is asked
Topic.
There are magnetic hysteresis resistances to overcome driving motor is proposed shaft type using all directions motor as the motor manufacturer of representative
High speed hub motor with teeth.The rated power of this motor meets existing national standards, and is combined on its pinion frame
Mono-directional overrun clutch efficiently solves influence of the magnetic hysteresis resistance of motor to riding.The driving of this hub motor with teeth
Motor is substantially exactly the scaled down version of low speed hub motor, and using the dead axle planetary gear train of primary speed-down, reduction ratio is usual
For 1:4.3, motor is poor to the adaptability of wheel footpath, and the revolving speed of its driving motor is usually no more than 1500 revs/min, strictly
Say that being also not really is high-speed motor in meaning.
Both the above mainstream motor, is Nd-Fe-B permanent-magnet D, simple, reliable for operation, small in size with structure,
Light-weight, the advantages that rated efficiency is high, good speed adjustment features, but due to the low speed characteristics of electric bicycle, actually riding
Motor often operates in inefficient section in journey, and the mileages of continuation of electric bicycle is not high, it is difficult to meet masses and continue to raising
The consumption demand of mileage.
China Patent No. 201010247971.8 discloses a kind of ultrathin high-power direct current magnetoelectric motor, proposes a kind of excellent
Choosing is fan-shaped coil using the outer loop-shaped of flat enameled wire coiling, is superimposed to form coil windings, Single-layer Windings around
After making, fixed glue being coated on its surface and is fixed, winding is mounted in the slot of stator frame and by interior pressing ring and external pressure
Circle is fixed.Actual situation is, it is ensured that the outer loop-shaped of coil is sector, and the area of the triangular inner hole of coil needs enough
Greatly, the number of turns of winding is reduced, and the coil of so coiling, stator disc space utilization rate is low, and magnetic field concentration is poor, to reduce magnetic flux
Loss, permanent magnet must have enough radical lengths, therefore the overlapping region very little of interior pressing ring, outer pressing ring and fan-shaped winding, only
Damage of falling apart as clockwork feed is easy under the situations such as vibration, fever in the coil windings that fixed glue is coated on surface.
And using the coil of round conductor coiling, then the round wire for needing the selection lesser yield strength of line footpath low is just able to maintain outer ring shape
For sector, it is also not possible to produce powerful direct current permanent magnet motor.The heavy-duty motor of high current will necessarily generate more
Heat needs reliable heat sink conception, which uses high intensity, high rigidity, heat-resisting, resistance to punching resistance, anti-aging work
The stator frame of engineering plastics precision injection molding, thermal conductivity coefficient generally only have 0.04W/mK, and the coil of flat wire coiling around
Group requires the air gap flux density of stator disc two sides strictly equal, and the rotor disk fixed by two bearings at flat thin stator frame center is very
Hardly possible meets so high requirement, and rotor disk, which slightly biases flat enamel wire coil, to generate heat, and the higher heat production of revolving speed is more
More, a large amount of heat is enclosed in rotor disk, also can not the stator frame made of engineering plastics dissipate, technical solution itself
Just there is significant deficiency.
China Patent No. 201010289645.3 discloses a kind of energy-saving hub motor, and it is straight equally to use disc type iron core-free
Galvanic electricity machine, and using electric vehicle hub as rotor disk, directly by In-wheel motor driving electric vehicle, which is also combined in wheel hub
Structure type identical disc type iron core-free generator is recharged for collecting electric energy caused by vehicle braking to battery, from
And play energy-efficient effect.Substantially, the inductance of disc type iron core-free direct current generator is smaller, belongs to the scope of low-power machine,
Most prominent advantage is high rpm low torque and without magnetic hysteresis resistance, and the efficiency when slow-speed of revolution is very low, and in the market to motor function
Rate requires the low speed sightseeing electric car of lesser 72V voltage, and motor rated power also requires have 5000W, on electric vehicle hub
The pitch circle of hub stud holes is limited to the space between the pitch circle in rim bolt hole, is arranged in this limited space high-power
Disc type iron core-free direct current generator and disc type iron core-free generator can not accomplish, moreover press the invention description, the energy conservation
The electric vehicle of hub motor can only install the solid tyre that cannot be inflated.
Application number 201310033295.8 discloses a kind of disc type iron core-free permanent magnet DC motor, is the electricity of axis rotation
Machine, the technical solution adopted is that: the axial symmetry conical ring Circular Winding that coil windings are made of multi-section circular arc, conical ring
Tip forms two different internal diameters behind stator axle center, the central axis trisection of axial symmetry conical ring, wherein boring
The internal diameter at shape ring tip is 2/3rds of another internal diameter, and the space utilization rate of this Circular Winding, stator disc is very low, magnetic field collection
Poly- property is worse, " stator armature winding uses iron-free core structure, directly has winding to be molded " referred in scheme, also without realization
Possibility, be that can not clear unordered winding outlet in injection moulding process, product qualification rate can be very low.The invention " annular around
Setting hall magnetic sensor in interval in group ", even more against the scheme of common sense, nine pins of three Hall sensors need
It is concatenated in the inter-air space of very little by conducting wire, technology difficulty is very big, and the Hall among Circular Winding is arranged in
Sensor, metal pin can generate heat rapidly under action of alternating magnetic field, burn Hall sensor.
The patent No. 201310310431.3 discloses a kind of disc type iron core-free permanent-magnet brushless DC electric machine, uses and application
The similar annulus winding of a kind of disc type iron core-free permanent magnet DC motor disclosed in numbers 201310033295.8, far from shaft end
Arc radius be proximate to 1.5-2 times of arc radius of shaft end, the arc radius of two stringcourse parts is the circular arc far from shaft end
The space utilization rate of 3-5 times of radius, stator disc is very low, and magnetic field concentration is worse, and coil windings lack limiting device, difficult
To limit coil in axial displacement；The invention motor uses a kind of disc type iron core-free direct current of outer rotor case rotation
Machine, goal of the invention is indefinite, and the specific aim that four O-ring seals are arranged is not strong, and motor lacks power output device and fixed dress
It sets, is also seemingly had using the totally different bearing of two kinds of specifications improper on motor shaft, motor uses no position hall position sensor, starts
When motor will appear shake hysteresis phenomenon.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention provides a kind of disc type iron core-free direct current
Machine, it is electronic that electric machine structure is simple, reliable for operation, small in size, light-weight, high-efficient, good speed adjustment features, electric property are superior
The driving motor of bicycle hub motor with teeth drives bicycle after slowing down by planetary gear train in wheel hub, can in the market
Electric bicycle controller matched.
Technical solution: in order to solve the above technical problems, a kind of disc type iron core-free direct current generator of the invention, including axis,
It is successively cased with first bearing, stator disc and second bearing on the axis, is cased with first respectively in first bearing and second bearing
The first groove, peace in the first groove are respectively equipped on the inside of rotor disk and the second rotor disk, the first rotor disk and the second rotor disk
Equipped with permanent magnet, it is fixedly connected on the outside of the first rotor disk with sun gear gear ring, passes through sun gear gear ring output torque, the stator
Disk is equipped with the pyriform hole for being used to install coil of several annular spreads, and coil is fixed in pyriform hole by limiting device,
Coil is connect with core of a cable.
Preferably, the limiting device includes inner ring rib, outer ring flange, annular circuit board and pressing ring, the stator
Disk is extended with inner ring rib and outer ring flange on one side, and the stator disc other side is equipped with annular circuit board and pressing ring, loop circuit
Plate is fixed on the inside of stator disc, and pressing ring is located on the outside of stator disc, passes through inner ring rib, outer ring flange, annular circuit board and pressing ring
Limit the axial displacement of coil.
Preferably, the stator disc is sequentially with three the second grooves, the second groove row far from inner ring rib on one side
It is listed in the center of circle side for being located at stator disc between adjacent two pyriform hole, Hall sensor, Hall sensor are installed in the second groove
Pin welded with the annular circuit board that is fixed on stator disc, annular circuit board is connect with core of a cable.
Preferably, the coil is the air core coil of circle copper enameled wire coiling, internal via shape is triangle, after coiling
Outer loop-shaped be pyriform and to match with pyriform hole；The interior angle that the triangular inner hole of the coil is located on the inside of stator disc is less than
60 °, the radical length of triangular inner hole is less than radial diameter, that is, long diameter one third of coil.The coil of pyriform is left and right
Symmetrical structure, the symmetry axis of each coil are directed toward the center of circle of permanent magnet, and the length of coil symmetry axis is long diameter, triangle
Inner hole is isosceles triangle, and the height on inner hole bottom edge is the radical length of triangle.
Preferably, the first rotor disk and the second rotor disk are made of ferrous material, shape be it is flat bowl-shape, the
The bearing chamber of one rotor disk is on the inside of it, by fixing sun gear gear ring on the outside as bearing rib；The axis of second rotor disk
Room position is held to be biased to its outside and be equipped with bearing rib.
Preferably, the first rotor disk and the second rotor disk are compound with aluminium alloy or with engineering plastics by irony annulus
Be made, shape be it is flat bowl-shape, the bearing chamber of the first rotor disk is made on the inside of it by fixing sun gear gear ring on the outside
For bearing rib；It is biased to its outside and is equipped with bearing rib in the bearing chamber position of second rotor disk.
Preferably, the permanent magnet is fan-shaped Nd-Fe-B permanent magnet material, radical length is the inside and outside of fan-shaped permanent magnet
Semidiameter is 0.5-0.8 times of the i.e. long diameter of radial diameter of coil.
Preferably, the permanent magnet includes several permanent magnet units, between two adjacent permanent magnets unit there are
The size of gap, gap is adapted to classical insulation.
The utility model has the advantages that disc type iron core-free direct current generator of the invention, electric property is superior, and, operation simple with structure can
Lean on, be small in size, is light-weight, is high-efficient, good speed adjustment features the advantages that outside, due also to use iron-free cored structure, no-load current is very
It is small and without magnetic hysteresis resistance, it is installed in wheel hub, installation freewheel clutch can not had to, be conducive to the peace for improving planetary gear set
Fill precision；In addition the disc rotor motor of flat bowl structure, so that being enclosed in inside motor in two rotor disks, by electricity of the invention
After machine is packed into wheel hub, planetary gear set can be lubricated with lubricating oil.
Detailed description of the invention
Fig. 1 is the overall structure diagram of disc type iron core-free direct current generator of the present invention.
Fig. 2 is disc type iron core-free direct current generator exploded view of the present invention.
Fig. 3 is the stator disc schematic diagram of disc type iron core-free direct current generator of the present invention.
Fig. 4 is the coil, Hall sensor and annular circuit board scheme of installation of disc type iron core-free direct current generator of the present invention.
Fig. 5 is disc type iron core-free direct current generator coil of the present invention and permanent magnet schematic diagram.
Fig. 6 is disc type iron core-free direct current generator composite material the first rotor disk schematic diagram of the present invention.
Fig. 7 is disc type iron core-free direct current generator composite material of the present invention second rotor disk schematic diagram.
Fig. 8 is the external magnetic field analysis chart after the coil of disc type iron core-free direct current generator of the present invention is powered.
Fig. 9 is the torque efficiency figure of disc type iron core-free direct current generator adjacent permanent magnet body space adjustment test of the present invention.
Specific embodiment
As shown in Figures 1 to 7, a kind of disc type iron core-free direct current generator of the invention, including axis 1, on the axis 1 according to
It is secondary to be cased with first bearing 4, stator disc 2 and second bearing 41, it is cased with the first rotor disk respectively in first bearing 4 and second bearing 41
5 and second rotor disk 51, the inside of the first rotor disk 5 and the second rotor disk 51 is respectively equipped with the first groove, peace in the first groove
Equipped with permanent magnet 6,5 outside of the first rotor disk is fixedly connected with sun gear gear ring 10, passes through 10 output torque of sun gear gear ring, institute
The pyriform hole 11 for being used to install coil 3 set on stator disc 2 there are six annular spread is stated, coil 3 is fixed on by limiting device
In pyriform hole 11, the coil 3 is the air core coil 3 of circle copper enameled wire coiling, and internal via shape is triangle, outer loop-shaped
For with the matched shape in pyriform hole 11, the coil windings that coil 3 forms connect with the core of a cable 9 transmitted for electric power and signal
It connects.
In the present invention, the limiting device includes inner ring rib 12, outer ring flange 13, annular circuit board 8 and pressing ring 15,
The stator disc 2 is extended with inner ring rib 12 and outer ring flange 13 on one side, and 2 other side of stator disc is equipped with annular circuit board 8
With pressing ring 15, annular circuit board 8 is fixed on 2 inside of stator disc, and pressing ring 15 is located at 2 outside of stator disc, by inner ring rib 12, outside
Enclose the axial displacement that rib 13, annular circuit board 8 and pressing ring 15 limit coil 3.The overall diameter of inner ring rib 12 is less than permanent magnet 6
Interior diameter, the interior diameter of outer ring flange 13 is greater than the overall diameter of permanent magnet 6；The stator disc 2 far from inner ring rib 12 one
Face is sequentially with three the second grooves 14, and the second groove 14 is arranged in the center of circle for being located at stator disc 2 between adjacent two pyriform hole 11
Side, the interior installation Hall sensor 7 of the second groove 14, three pins of Hall sensor 7 and the annular being fixed on stator disc 2
Circuit board 8 welds, and annular circuit board 8 is connect with core of a cable 9.
In the present invention, the first rotor disk 5 and the second rotor disk 51 are made of ferrous material, and shape is flat bowl
Shape, the bearing chamber 16 of the first rotor disk 5 is on the inside of it, by fixing sun gear gear ring 10 on the outside as bearing rib；Second
It is biased to its outside and is equipped with bearing rib 17 in 161 position of bearing chamber of rotor disk 51.The first rotor disk 5 and the second rotor disk 51
Can also be combined by irony annulus 18 with aluminium alloy or with engineering plastics, shape be it is flat bowl-shape, the first rotor disk 5
Bearing chamber 16 is on the inside of it, by fixing sun gear gear ring 10 on the outside as bearing rib；The bearing chamber of second rotor disk 51
It is biased to its outside and is equipped with bearing rib 17 in position.The advantages of program, is: going out on axis 1 is left inside flat thin motor
The space that string holes position and harness 9 are connect with winding outlet, annular circuit board 8 manufactures the first rotor disk using composite material
5 and second rotor disk 51, the weight of motor can be lighter.
It is analyzed and is tested based on energization air core coil external magnetic field, the invention proposes the lines of disc type iron core-free direct current generator
The most economical effective combination of circle 3 and permanent magnet 6.Such as Fig. 8, pass through the finite element fraction to single energization air core coil external magnetic field
Analysis and experimental verification, energization air core coil center, magnetic induction intensity with the increase of coil radius first increases then again by
It is decrescence small, there is a peak value in hollow adjacent edges, hollow area is smaller, and magnetic field, which is gathered, to be more obvious；Energization air core coil
The magnetic induction intensity on surface appears in the near axis of coil, remoter apart from hub of a spool, especially in the outer edge of coil, declines
Subtract quickly；Air gap portion coil surface magnetic field strength is maximum, and with the increase of offline circle surface distance, magnetic field strength declines rapidly
Subtract, numerical value very little；By the analysis verifying to energization air core coil magnetic induction intensity rule, disc type iron core-free direct current has been obtained
The Technology Ways of machine are: the appropriate radical length (the inside and outside semidiameter of sector electromagnet) for reducing fan-shaped permanent magnet 6 reduces as far as possible
The area of 3 hollow parts of coil.
The radical length for reducing fan-shaped permanent magnet 6, can generate part flux loss, and following table is the radical length of permanent magnet 6
(air core coil radial diameter is D=to Experimental comparison's data that variation influences disc type iron core-free direct current generator cost, efficiency
32mm, the high 10.0mm of coil, copper enameled wire line footpath 0.6mm, electrical current 3.5A, hollow radical length 9.6mm, fan-shaped permanent magnet
Inside and outside diameter average value 68mm).It can be seen that the reduction of the radical length with permanent magnet 6, coil 3 from 1 correlation data of table
Flux loss increases with it and is in the trend for accelerating to increase, and motor maximal efficiency also accordingly reduces, and the degree that efficiency reduces is less than
The range of decrease of flux loss degree, 6 material cost of permanent magnet becomes apparent.By Value Engineering, appropriateness reduces fan-shaped permanent magnet 6
Radical length, the efficiency and torque of motor can decrease, but can more reduce the consumption of rare earth permanent magnet, the economy of motor
Property is more preferable, and competitiveness is stronger.
Table 1
6 radical length of permanent magnet (the inside and outside semidiameter of fan-shaped permanent magnet) is less than the technical solution of the radial diameter of coil 3,
Limiting device is set and provides necessary space for fixed coil 3, the proportionate relationship of the two determines limiting device of the present invention
Inner ring rib 12, outer ring flange 13, annular circuit board 8 and pressing ring 15 limit the effect of 3 axial displacement of coil, such as take permanent magnet diameter
It is 0.9D to length, limiting device laminates width less than 0.05D with coil 3, and fixed effect is poor；And take permanent magnet 6 radial
Length is less than 0.5D, then flux loss is larger, and Motor torque and efficiency can also accordingly decrease；Experiment shows correctly to handle well
The proportionate relationship of the radial diameter of the radical length and coil 3 of permanent magnet 6, can be such that the advance, reliability, economy of motor obtains
To preferable balance.
In the present invention, the permanent magnet 6 is fan-shaped Nd-Fe-B permanent magnet material, and radical length is fan-shaped permanent magnet 6
Inside and outside semidiameter is 0.5-0.8 times of the i.e. long diameter of radial diameter of coil 3.The permanent magnet 6 includes 8 permanent magnet Unit 6,
There are gap between two adjacent permanent magnets Unit 6, the size in gap is adapted to classical insulation.
Embodiment
Disc type iron core-free direct current generator, winding are made of 6 coils 3, and the radial diameter of coil 3 is D=32mm, high
The inside and outside diameter of 10.0mm, copper enameled wire line footpath 0.67mm, the hollow radical length 9.6mm of triangle, 8 permanent magnet Unit 6 are flat
Mean value 68mm, radical length 20mm, axial height 6mm, wheel hub use reduction ratio to slow down for the planetary gear speed reducing mechanism of 1:8.74, fan
The central angle of shape permanent magnet 6 takes 45 °, 41 °, 38 ° to compare test respectively；From torque efficiency curve graph shown in Fig. 9,
The peak efficiency of three kinds of motors is respectively 83.8%, 83.1%, 80.6%, reserves gap between two adjacent permanent magnets Unit 6
Afterwards, on electric efficiency influence it is unobvious, it is smaller in the influence of high torque section, this result also with energization air core coil external magnetic field
Analysis and experimental result match；Gap variation between permanent magnet 6 is affected to the speed of motor, the zero load of three kinds of motors
Revolving speed is respectively 281 revs/min, 330 revs/min, 361 revs/min, it is possible thereby to targetedly adjust adjacent permanent magnet 6
Between gap, improve the electric property of motor to adapt to hub motor deceleration mechanism reduction ratio and rim of electric bicycle ruler
Very little variation.
Relative to cored motor, the inductance of the coil windings of disc type iron core-free motor is smaller, and lesser inductance makes
The electric property of motor shows as high rpm low torque, its inductance can be improved in the length of the number of turns and conducting wire for increasing coil windings
Amount can take the diameter for increasing coil 3 or reduce two kinds of Technology Ways of line footpath of conducting wire；The line footpath for reducing conducting wire can make winding electric
Resistance, which rises, simultaneously reduces power of motor, and increases the number of turns of coil windings and the length of conducting wire will increase the cost and body of motor
Product, therefore it is required that increasing the number of turns and length of the conducting wire of setting line footpath as much as possible in the limited space of stator disc 2, preferably
Method for winding is: using the triangle stick after chamfered as plug coiling conducting wire is laminated, thus the coil of coiling in winding clamp
3, internal via shape is triangle, and outer loop-shaped is by the shape size of triangle plug, the line footpath of conducting wire, the yield strength of conducting wire
And the combined influences such as winding tension resemble a pear in shape.
Based on the analysis of air core coil external magnetic field and experimental result, the area of coil hollow parts should be reduced as far as possible, and
Hollow area is smaller, and the outer loop-shaped of coil can not make full use of the space of stator disc 2 closer to circle.The inner hole of coil 3
It should be determined according to the line footpath of conducting wire, the yield strength of conducting wire, the size of 2 diameter of stator disc, the number of coils of winding with outer loop-shaped
Fixed, through coiling repeatedly and test, the triangular inner hole of coil is located at the interior angle on the inside of stator disc less than 60 °, triangular inner hole
Radical length is less than the design scheme of radial diameter, that is, long diameter one third of coil, can better meet stator disc 2
The requirement that space utilization and magnetic field are gathered to 3 center of coil.
Disc type iron core-free direct current generator of the present invention, the advantage protruded have: 1) stator disc 2, inner ring rib 12, outer ring flange
13 can be able to achieve inexpensive height by the insulating material of polymer of high intensity, high-fire resistance, good moldability by molding one-pass molding
Efficiency production；2) use internal via shape for the air core coil 3 of triangle, 3 coiling back out circle shape of coil is pyriform, and winding is fixed
Space utilization rate in sub-disk 2 improves 20% than the air core coil 3 of circular inner hole, while also improving the inductance of winding；
3) pressing ring 15 of fixed coil 3 equally can pass through molding by the insulating material of polymer of high intensity, high-fire resistance, good moldability
Molding, pressing ring 15, annular circuit board 8 and inner ring rib 12, outer ring flange 13 on stator, limits the axial displacement of coil 3；
4) the fan-shaped permanent magnet 6 of Nd-Fe-B permanent magnet material, radical length (the inside and outside semidiameter of sector electromagnet) are the radial straight of coil 3
0.5-0.8 times of diameter, and also there are gaps between adjacent two panels permanent magnet 6, not only reduce the dosage of permanent-magnet material, also mention
The high high speed performance of motor, according to test and verifying of actually riding, the electric property of motor is not because of 6 material of permanent magnet
It reduces and reduces；5) rotor disk is closely interlocked under the action of two groups of 6 magnetic field of permanent magnet, need not take again after installation
Other security measures, therefore can do the radial dimension of disc type iron core-free direct current generator of the present invention in limited wheel hub space
Must be bigger, and since two rotor disks are mounted on axis 1 by two symmetrical bearing holder (housing, cover)s, there is gear hub with presently commercially available
Motor is compared using the structure of unilateral bearing fixed rotor, and the circular runout of motor is smaller.
Disc type iron core-free direct current generator of the present invention, electric property is superior, in addition to conventional motors structure it is simple, it is reliable for operation,
Outside the advantages that small in size, light-weight, high-efficient, good speed adjustment features, due also to iron-free cored structure is used, motor weight saving,
Overload capacity is strong, and no-load current is small and without magnetic hysteresis resistance, is installed in wheel hub, can not have to installation freewheel clutch, favorably
In the installation accuracy for improving planetary gear train；In addition the disc rotor motor of flat bowl structure, so that being enclosed in two inside motor
In rotor disk, after motor of the invention is packed into wheel hub, planetary gear train can be used lubricating oil and be lubricated.
Disk permanent-magnet dc motor of the invention is used for electric bicycle, and no-load current only has 0.3A, and advantage is very bright
Aobvious, under the situation that identical condition of riding, identical power consumption, pure electric power travel, mileages of continuation ratio is currently on the market
The mileages of continuation of the electric vehicle of the hub motor with teeth generallyd use improves 35% or more, than the electricity using low speed hub motor
The mileages of continuation of motor-car improves 45% or more.In addition present inventor is to using disk permanent-magnet dc motor of the invention
Electric bicycle model machine verified, can be carried out by the requirement of batch production, the Mold Making of individual important aspects also into
Effective trial is gone, electric bicycle sample car ridden more than 6,000 kilometers by fault-free, and uses in certain specific experiment
48V18AH lithium battery group has successfully carried out single charge and has ridden from Nanjing to 119 kilometers of Changzhou overall length of pure electric vehicle overlength distance
Row test.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (7)
1. a kind of disc type iron core-free direct current generator, it is characterised in that: using the driving motor of electric bicycle hub motor with teeth,
Including axis, it is successively cased with first bearing, stator disc and second bearing on the axis, distinguishes in first bearing and second bearing
It is cased with the first rotor disk and the second rotor disk, is respectively equipped with the first groove on the inside of the first rotor disk and the second rotor disk, first
Permanent magnet is installed in groove, is fixedly connected on the outside of the first rotor disk with sun gear gear ring, by sun gear gear ring output torque,
The stator disc is equipped with three of the pyriform hole and installation Hall sensor for installing coil of several annular spreads the
Two grooves, coil are fixed in pyriform hole by limiting device, and coil and annular circuit board are connect with core of a cable respectively；
The limiting device includes inner ring rib, outer ring flange, annular circuit board and pressing ring, and the stator disc is extended on one side
Inner ring rib and outer ring flange, the stator disc other side are equipped with annular circuit board and pressing ring, and annular circuit board is fixed on stator disc
Inside, pressing ring are located on the outside of stator disc, and the axial direction of coil is limited by inner ring rib, outer ring flange, annular circuit board and pressing ring
Displacement；
The bearing chamber of the first rotor disk is on the inside of it, by fixing sun gear gear ring on the outside as bearing rib；Second
It is biased to its outside and is equipped with bearing rib in the bearing chamber position of rotor disk.
2. disc type iron core-free direct current generator according to claim 1, it is characterised in that: three the second grooves sequence is set
In one side of the stator disc far from inner ring rib, the second groove arrangement is located at the center of circle one of stator disc between adjacent two pyriform hole
Side, the second groove is interior to install Hall sensor, and the pin of Hall sensor is welded with the annular circuit board being fixed on stator disc.
3. disc type iron core-free direct current generator according to claim 1, it is characterised in that: the coil be circle copper enameled wire around
The air core coil of system, internal via shape are triangle, and the outer ring nature shape after coiling is pyriform and matches with pyriform hole；Institute
The triangular inner hole for stating coil is located at interior angle on the inside of stator disc less than 60 °, and the radical length of triangular inner hole is less than coil
Radial diameter, that is, long diameter one third.
4. disc type iron core-free direct current generator according to claim 1, it is characterised in that: the first rotor disk and second turn
Sub-disk is made of ferrous material, and shape is flat bowl-shape.
5. disc type iron core-free direct current generator according to claim 1, it is characterised in that: the first rotor disk and second turn
Sub-disk is combined by irony annulus with aluminium alloy or with engineering plastics, and shape is flat bowl-shape, the bearing of the first rotor disk
Room is on the inside of it, by fixing sun gear gear ring on the outside as bearing rib；It is biased to it in the bearing chamber position of second rotor disk
Outside is simultaneously equipped with bearing rib.
6. disc type iron core-free direct current generator according to claim 1, it is characterised in that: the permanent magnet is fan-shaped neodymium iron boron
Permanent-magnet material, radical length are the 0.5-0.8 that the inside and outside semidiameter of fan-shaped permanent magnet is the i.e. long diameter of radial diameter of coil
Times.
7. disc type iron core-free direct current generator according to claim 1, it is characterised in that: the permanent magnet include several forever
Magnet unit, there are gap between two adjacent permanent magnets unit, the size in gap is adapted to motor classical insulation.
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| CN201610783246.XA CN106300855B (en) | 2016-08-29 | 2016-08-29 | A kind of disc type iron core-free direct current generator |
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| CN201610783246.XA CN106300855B (en) | 2016-08-29 | 2016-08-29 | A kind of disc type iron core-free direct current generator |
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| CN106300855B true CN106300855B (en) | 2019-02-01 |
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| CN106828650B (en) * | 2017-03-24 | 2023-03-17 | 洛阳圣瑞智能机器人有限公司 | Magnetic adsorption steering wheel for magnetic adsorption wall-climbing robot |
| GB2599592B (en) * | 2021-01-29 | 2023-05-03 | Univ Jiangsu | Dual-rotor in-wheel motor based on axial magnetic field and control method therefor |
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| CN1160943A (en) * | 1996-01-18 | 1997-10-01 | 有裕株式会社 | Coreless type BLDC motor and method of producing stator assembly |
| CN1297603A (en) * | 1999-03-31 | 2001-05-30 | 松下电器产业株式会社 | Brushless motor |
| CN101951106A (en) * | 2010-08-06 | 2011-01-19 | 深圳创维－Rgb电子有限公司 | Ultrathin high-power direct current magnetoelectric motor |
| CN206041763U (en) * | 2016-08-29 | 2017-03-22 | 眭华兴 | Disk does not have iron core direct current motor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6974399B2 (en) * | 2004-02-11 | 2005-12-13 | Chiu-Hsiang Lo | Hub motor mechanism |
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2016
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|---|---|---|---|---|
| CN1160943A (en) * | 1996-01-18 | 1997-10-01 | 有裕株式会社 | Coreless type BLDC motor and method of producing stator assembly |
| CN1297603A (en) * | 1999-03-31 | 2001-05-30 | 松下电器产业株式会社 | Brushless motor |
| CN101951106A (en) * | 2010-08-06 | 2011-01-19 | 深圳创维－Rgb电子有限公司 | Ultrathin high-power direct current magnetoelectric motor |
| CN206041763U (en) * | 2016-08-29 | 2017-03-22 | 眭华兴 | Disk does not have iron core direct current motor |
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| 小型垂直轴风力发电盘式永磁电机的研究;夏冰;《中国优秀硕士学位论文全文数据库》;20110715(第7期);1-78 |
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| CN106300855A (en) | 2017-01-04 |
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