CN106300855A - A kind of disc type iron core-free direct current generator - Google Patents

Abstract

The invention discloses a kind of disc type iron core-free direct current generator, including axis, clutch shaft bearing it is cased with successively on described axis, stator disc and the second bearing, the first rotor dish and the second rotor disk it is cased with respectively on clutch shaft bearing and the second bearing, the inner side of the first rotor dish and the second rotor disk is respectively equipped with the first groove, in first groove, permanent magnet is installed, fix with sun gear gear ring outside the first rotor dish and be connected, moment of torsion is exported by sun gear gear ring, described stator disc is provided with the pyriform hole for installing coil of several annular spread, coil is fixed in pyriform hole by stopping means, coil is connected with the core of a cable transmitted for electric power and signal.The disc type iron core-free direct current generator of the present invention, electric property is superior, due also to have employed iron-core-free structure, no-load current is the least and without magnetic hysteresis resistance, is installed in wheel hub, can install freewheel clutch, is conducive to improving the installation accuracy of planetary gearsets.

Description

A kind of disc type iron core-free direct current generator

Technical field

The present invention relates to disc type iron core-free direct current generator, belong to the driving machine field of electric bicycle.

Background technology

Existing electric bicycle, uses low speed wheel hub motors more, has an advantage in that: power of motor is big, motor typically without Safeguarding, transmission efficiency is high, but owing to this motor exists magnetic hysteresis resistance, weakens the merit of riding even losing electric bicycle Can, the development course of motorized easypro formula gradually gone on by electric boosted type bicycle, and it drives power of motor and travel speed Remote super existing national standard.Motorized electric bicycle, vehicle accident takes place frequently, it has also become a kind of society that need solve is asked Topic.

For overcoming driving motor to there is magnetic hysteresis resistance, the motor manufacturer with all directions motor as representative, it is proposed shaft type There is gear hub motor at a high speed.The rated power of this motor meets existing national standards, and is combined with on its pinion frame Mono-directional overrun clutch, efficiently solves the impact on riding of the magnetic hysteresis resistance of motor.This driving having gear hub motor Motor is exactly substantially the scaled down version of low speed wheel hub motor, uses the dead axle planet circular system of primary speed-down, and speed reducing ratio is usual For 1:4.3, motor is poor to the adaptability in wheel footpath, and it drives the rotating speed of motor to be usually no more than 1500 revs/min, strictly Say in meaning that being also not really is high-speed electric expreess locomotive.

Both the above main flow motor, is Nd-Fe-B permanent-magnet D, have simple in construction, reliable, volume is little, The advantages such as lightweight, rated efficiency is high, good speed adjustment features, but due to the low speed characteristics of electric bicycle, rode actual In journey, motor often operates in inefficient interval, and the mileages of continuation of electric bicycle is the highest, it is difficult to meets masses and continues raising The consumption demand of mileage.

China Patent No. 201010247971.8 discloses a kind of ultrathin high-power direct current magnetoelectric motor, it is proposed that Yi Zhongyou Choosing use flat enamel-covered wire coiling outer ring be shaped as sector coil, be superimposed to form coil windings, Single-layer Windings around After making, coat fixing glue on its surface and be fixed, in winding is arranged on the groove of stator frame and by interior trim ring and external pressure Circle is fixing.Actual situation is, it is ensured that the outer ring of coil is shaped as sector, and the area of the triangular inner hole of coil needs enough Greatly, the number of turn of minimizing winding, and the coil of so coiling, stator disc space availability ratio is low, and magnetic field concentration is poor, for reducing magnetic flux Loss, permanent magnet must have enough radical lengths, and therefore interior trim ring, outer trim ring are the least, only with the overlapping region of fan-shaped winding The coil windings coating fixing glue on surface is easy to as clockwork feed, under the situations such as vibration, heating, damage of falling apart. And using the coil of round conductor coiling, then the round wire needing the yield strength selecting line footpath less low could keep outer loop-shaped For sector, it is also not possible to produce powerful direct current permanent magnet motor.The heavy-duty motor of big electric current will necessarily produce more Heat, it is desirable to have heat sink conception reliably, this invention have employed high intensity, high rigidity, punching resistance heat-resisting, resistance to, aging-resistant work The stator frame of engineering plastics precision injection molding, its thermal conductivity coefficient typically only have 0.04W/mK, and the coil of flat wire coiling around Group requires that the air gap flux density of stator disc both sides is the most equal, and the rotor disk fixing by two bearings at flat thin stator frame center is very Difficult that meet the highest requirement, rotor disk slightly biases flat enamel wire coil and will generate heat, and the highest heat production of rotating speed is more Many, substantial amounts of heat is enclosed in rotor disk, also cannot be dissipated by the stator frame that engineering plastics are made, its technical scheme itself Just there is significant deficiency.

China Patent No. 201010289645.3 discloses a kind of energy-saving hub motor, have employed disc type iron core-free equally straight Stream motor, and using electric vehicle hub as rotor disk, directly by In-wheel motor driving electric motor car, this invention is also combined in wheel hub The disc type iron core-free electromotor that version is identical, is used for collecting electric energy produced by car braking and recharges to accumulator, from And play energy-conservation effect.Substantially, the inductance value of disc type iron core-free direct current generator is less, belongs to the category of low-power machine, its The most prominent advantage is high rpm low torque and without magnetic hysteresis resistance, and the efficiency during slow-speed of revolution is the lowest, and to motor merit on market Rate requires the low speed sightseeing electric car of less 72V voltage, and its motor rated power has also required that 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, arranges high-power in the space that this is limited Disc type iron core-free direct current generator and disc type iron core-free electromotor cannot accomplish, moreover by the description of this invention, this is energy-conservation The electric motor car of wheel hub motor can only install the solid tyre that can not inflate.

Application number 201310033295.8 discloses a kind of disc type iron core-free permanent magnet DC motor, is the electricity of an axle rotation Machine, it the technical scheme is that the axial symmetry conical ring Circular Winding that coil windings is made up of multi-section circular arc, conical ring Most advanced and sophisticated near stator axle center, form two different internal diameter sizes after the central axis trisection of axial symmetry conical ring, wherein bore The internal diameter at shape ring tip is 2/3rds of another internal diameter, and this Circular Winding, the space availability ratio of stator disc is the lowest, magnetic field collection Poly-property is worse, and " stator armature winding uses non iron-core structure, directly has winding to be molded " mentioned in scheme, also without realizing Possibility, injection moulding process is cannot put unordered winding outlet in order, conforming product rate can be the lowest.This invention " annular around In group, interval arranges hall magnetic sensor ", especially against the scheme of general knowledge, nine pins of three Hall elements, need Being concatenated by wire in the least inter-air space, its technology difficulty is very big, and is arranged on the Hall in the middle of Circular Winding Sensor, its metal pin can generate heat rapidly under action of alternating magnetic field, burn Hall element.

The patent No. 201310310431.3 discloses a kind of disc type iron core-free permanent-magnet brushless DC electric machine, have employed and apply for The annulus winding that a kind of disc type iron core-free permanent magnet DC motor disclosed in numbers 201310033295.8 is similar, it is away from axle head Arc radius be proximate to 1.5-2 times of arc radius of axle head, the arc radius of two stringcourse parts is remote from the circular arc of axle head 3-5 times of radius, the space availability ratio of stator disc is the lowest, and magnetic field concentration is worse, and coil windings lacks stopping means, difficult With limiting coil in axial displacement；This invention motor have employed the disc type iron core-free unidirectional current that a kind of outer rotor case rotates Machine, goal of the invention is indefinite, and the specific aim arranging four O-ring seals is not strong, and motor lacks PTO and fixing dress Putting, the bearing that on motor shaft, two kinds of specifications of employing are totally different the most seemingly has improper, and motor uses without position hall position sensor, starts Time motor there will be 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 unidirectional current Machine, electric machine structure is simple, reliable, volume is little, lightweight, efficiency is high, good speed adjustment features, electric property are superior, is electronic Bicycle has the driving motor of gear hub motor, by the planet circular system deceleration rear drive bicycle in wheel hub, can with on market Electric bicycle controller mate.

Technical scheme: for solving above-mentioned technical problem, a kind of disc type iron core-free direct current generator of the present invention, including axis, It is cased with successively on described axis on clutch shaft bearing, stator disc and the second bearing, clutch shaft bearing and the second bearing being cased with first respectively Rotor disk and the second rotor disk, the inner side of the first rotor dish and the second rotor disk is respectively equipped with the first groove, peace in the first groove Equipped with permanent magnet, fix with sun gear gear ring outside the first rotor dish and be connected, export moment of torsion, described stator by sun gear gear ring Dish is provided with the pyriform hole for installing coil of several annular spread, and coil is fixed in pyriform hole by stopping means, Coil is connected with core of a cable.

As preferably, described stopping means comprises inner ring rib, outer ring flange, annular circuit board and trim ring, described stator The one side of dish is extended with inner ring rib and outer ring flange, and stator disc opposite side is provided with annular circuit board and trim ring, loop circuit Plate is fixed on inside stator disc, and trim ring is positioned at outside stator disc, by inner ring rib, outer ring flange, annular circuit board and trim ring The axial displacement of limiting coil.

As preferably, described stator disc is sequentially with three the second grooves, the second groove row away from the one side of inner ring rib It is listed in the side, the center of circle being positioned at stator disc between adjacent two pyriform holes, Hall element, Hall element are installed in the second groove Pin weld with the annular circuit board being fixed on stator disc, annular circuit board is connected with core of a cable.

As preferably, described coil is the air core coil of circle copper enamel-covered wire coiling, and its internal via shape is triangle, after coiling Outer ring be shaped as pyriform and match with pyriform hole；The interior angle that the triangular inner hole of described coil is positioned at inside stator disc is less than 60 °, the radical length of triangular inner hole is less than 1/3rd of the longest diameter of radial diameter of coil.The coil of pyriform is left and right Symmetrical structure, the axis of symmetry of each coil points to the center of circle of permanent magnet, and the length of coil axis of symmetry is long diameter, triangle Endoporus is isosceles triangle, and the height on endoporus base is the radical length of triangle.

As preferably, described the first rotor dish and the second rotor disk are made up of ferrous material, and its profile is flat bowl-shape, the The bearing chamber of one rotor disk within it, is kept off as bearing by the sun gear gear ring being fixed on outside it；The axle of the second rotor disk Hold position, room be partial to outside it and be provided with bearing gear.

As preferably, described the first rotor dish and the second rotor disk are combined with aluminium alloy or with engineering plastics by irony annulus Making, its profile is flat bowl-shape, and the bearing chamber of the first rotor dish within it, is made by the sun gear gear ring being fixed on outside it Keep off for bearing；The bearing chamber position of the second rotor disk is partial to outside it and is provided with bearing gear.

As preferably, described permanent magnet is fan-shaped Nd-Fe-B permanent magnet material, and its radical length is the inside and outside of fan-shaped permanent magnet Semidiameter is 0.5-0.8 times of the longest diameter of radial diameter of coil.

As preferably, described permanent magnet comprises several permanent magnet units, between leaving between two adjacent permanent magnets unit Gap, the size in gap is adaptive with classical insulation.

Beneficial effect: the disc type iron core-free direct current generator of the present invention, electric property is superior, have simple in construction, run can Lean on, outside the advantage such as volume is little, lightweight, efficiency is high, good speed adjustment features, due also to have employed iron-core-free structure, no-load current is very Little and without magnetic hysteresis resistance, it is installed in wheel hub, freewheel clutch can be installed, be conducive to improving the peace of planetary gearsets Dress precision；The disc rotor motor of the most flat bowl structure so that motor internal is enclosed in two rotor disks, by the electricity of the present invention After machine loads wheel hub, planetary gearsets can be lubricated with lubricating oil.

Accompanying drawing explanation

Fig. 1 is the overall structure schematic 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 of disc type iron core-free direct current generator of the present invention, Hall element and annular circuit board scheme of installation.

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 the first rotor dish schematic diagram of the present invention.

Fig. 7 is disc type iron core-free direct current generator composite the second rotor disk schematic diagram of the present invention.

Fig. 8 is the external magnetic field analysis chart after the coil electricity of disc type iron core-free direct current generator of the present invention.

Fig. 9 is the torque efficiency figure that disc type iron core-free direct current generator adjacent permanent magnet body space of the present invention adjusts test.

Detailed description of the invention

As shown in Figures 1 to 7, a kind of disc type iron core-free direct current generator of the present invention, including axis 1, described axis 1 depends on Secondary it is cased with clutch shaft bearing 4, stator disc 2 and the second bearing 41, clutch shaft bearing 4 and the second bearing 41 are cased with the first rotor dish respectively 5 and second rotor disk 51, the inner side of the first rotor dish 5 and the second rotor disk 51 is respectively equipped with the first groove, peace in the first groove Equipped with permanent magnet 6, fix with sun gear gear ring 10 outside the first rotor dish 5 and be connected, export moment of torsion by sun gear gear ring 10, institute Stating stator disc 2 and be provided with the pyriform hole 11 for installing coil 3 of six annular spread, coil 3 is fixed on by stopping means In pyriform hole 11, described coil 3 is the air core coil 3 of circle copper enamel-covered wire coiling, and its internal via shape is triangle, its outer loop-shaped For the shape mated with pyriform hole 11, the coil windings of coil 3 composition is with the core of a cable 9 transmitted for electric power and signal even Connect.

In the present invention, described stopping means comprises inner ring rib 12, outer ring flange 13, annular circuit board 8 and trim ring 15, The one side of described stator disc 2 is extended with inner ring rib 12 and outer ring flange 13, and stator disc 2 opposite side is provided with annular circuit board 8 With trim ring 15, annular circuit board 8 is fixed on inside stator disc 2, and trim ring 15 is positioned at outside stator disc 2, by inner ring rib 12, outward Circle rib 13, annular circuit board 8 and the axial displacement of trim ring 15 limiting 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 more than the overall diameter of permanent magnet 6；Described stator disc 2 is away from the one of inner ring rib 12 Face is sequentially with three the second grooves 14, and the second groove 14 is arranged in the center of circle being positioned at stator disc 2 between adjacent two pyriform holes 11 Side, installs Hall element 7, three pins and the annular being fixed on stator disc 2 of Hall element 7 in the second groove 14 Circuit board 8 welds, and annular circuit board 8 is connected with core of a cable 9.

In the present invention, described the first rotor dish 5 and the second rotor disk 51 are made up of ferrous material, and its profile is flat bowl Shape, the bearing chamber 16 of the first rotor dish 5 within it, is kept off as bearing by the sun gear gear ring 10 being fixed on outside it；Second Bearing chamber 161 position of rotor disk 51 is partial to outside it and is provided with bearing gear 17.Described the first rotor dish 5 and the second rotor disk 51 Can also be by irony annulus 18 and aluminium alloy or compound with engineering plastics make, its profile is flat bowl-shape, the first rotor dish 5 Bearing chamber 16 within it, is kept off as bearing by the sun gear gear ring 10 being fixed on outside it；The bearing chamber of the second rotor disk 51 Position is partial to outside it and is provided with bearing gear 17.The advantage of the program is: leave going out on axis 1 at flat thin motor internal String holes position, and the space that wire harness 9 is connected with winding outlet, annular circuit board 8, use composite to manufacture the first rotor dish 5 and second rotor disk 51, the weight of motor can be lighter.

Analyzing and experiment based on energising air core coil external magnetic field, the present invention proposes the line of disc type iron core-free direct current generator Circle 3 and the most economical effective combination of permanent magnet 6.Such as Fig. 8, by the finite element fraction to single energising air core coil external magnetic field Analysis and experimental verification, be energized air core coil center, magnetic induction along with the increase of coil radius first increase the most again by The least, at hollow adjacent edges, one peak value occurs, hollow area is the least, and magnetic field is gathered the most obvious；Energising air core coil The magnetic induction on surface occurs in the near axis of coil, and distance hub of a spool is the most remote, particularly at the outward flange of coil, declines Subtract quickly；Air gap portion coil surface magnetic field intensity is maximum, and along with the increase of off-line circle surface distance, magnetic field intensity declines rapidly Subtracting, numerical value is the least；By the analysis verification to energising air core coil magnetic induction rule, draw disc type iron core-free unidirectional current The Technology Ways of machine is: suitably reduces the radical length (the inside and outside semidiameter of sector electromagnet) of fan-shaped permanent magnet 6, reduce as far as possible The area of coil 3 hollow parts.

Reducing the radical length of fan-shaped permanent magnet 6, can produce part flux loss, following table is the radical length of permanent magnet 6 (air core coil radial diameter is D=to change the Experimental comparison's data on disc type iron core-free direct current generator cost, efficiency impact 32mm, coil height 10.0mm, copper enamel-covered wire line footpath 0.6mm, electrical current 3.5A, hollow radical length 9.6mm, fan-shaped permanent magnet Inside and outside diameter meansigma methods 68mm).From table 1 correction data it can be seen that the reduction of radical length along with permanent magnet 6, coil 3 The trend that flux loss increases therewith and increases in acceleration, motor maximal efficiency reduces the most accordingly, and the degree that efficiency reduces is less than Flux loss degree, the range of decrease of permanent magnet 6 material cost becomes apparent from.By Value Engineering, appropriateness reduces fan-shaped permanent magnet 6 Radical length, the efficiency of motor and moment of torsion can decrease, but can more reduce the consumption of rare earth permanent magnet, the economy of motor Property more preferable, competitiveness is higher.

Table 1

Permanent magnet 6 radical length (the inside and outside semidiameter of fan-shaped permanent magnet) is less than the technical scheme of the radial diameter of coil 3, Stopping means is set for fixed coil 3 and provides the space of necessity, both proportionate relationships, determine stopping means of the present invention Inner ring rib 12, outer ring flange 13, annular circuit board 8 and the effect of the axial displacement of trim ring 15 limiting coil 3, as taken permanent magnet footpath To a length of 0.9D, stopping means is less than 0.05D with the width that laminates of coil 3, and fixed effect is poor；And take permanent magnet 6 radially Length is less than 0.5D, then flux loss is relatively big, and Motor torque and efficiency also can correspondingly reduce；Experiment shows, correctly handles well The radical length of permanent magnet 6 and the proportionate relationship of the radial diameter of coil 3, can make the advance of motor, reliability, economy obtain To preferably balancing.

In the present invention, described permanent magnet 6 is fan-shaped Nd-Fe-B permanent magnet material, the most fan-shaped permanent magnet 6 of its radical length Inside and outside semidiameter is 0.5-0.8 times of the longest diameter of radial diameter of coil 3.Described permanent magnet 6 comprises 8 permanent magnet 6 unit, Leaving gap between two adjacent permanent magnets 6 unit, the size in gap is adaptive with classical insulation.

Embodiment

Disc type iron core-free direct current generator, winding is made up of 6 coils 3, and the radial diameter of coil 3 is D=32mm, high 10.0mm, copper enamel-covered wire line footpath 0.67mm, triangle hollow radical length 9.6mm, the inside and outside diameter of 8 permanent magnet 6 unit is put down Average 68mm, radical length 20mm, axial height 6mm, the planetary gear speed reducing mechanism that wheel hub uses speed reducing ratio to be 1:8.74 slows down, fan The central angle of shape permanent magnet 6 takes 45 °, 41 °, 38 ° respectively and carries out contrast test；From the torque efficiency curve chart 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 6 unit After, on electric efficiency impact inconspicuous, less in the impact of high torque section, this result also with energising air core coil external magnetic field Analyze and experimental result matches；The speed of motor is affected the most greatly by the gap change between permanent magnet 6, the zero load of three kinds of motors Rotating speed is respectively 281 revs/min, 330 revs/min, 361 revs/min, thus can adjust adjacent permanent magnet 6 targetedly Between gap, improve the electric property of motor to adapt to wheel hub motor reducing gear speed reducing ratio and rim of electric bicycle chi Very little change.

Relative to cored motor, the inductance value of the coil windings of disc type iron core-free motor is less, and less inductance value makes The electric property of motor shows as high rpm low torque, and the length of the number of turn and wire that increase coil windings can improve its inductance Amount, can take strengthen the diameter of coil 3 or reduce two kinds of the line footpath Technology Ways of wire；The line footpath reducing wire can make winding electricity Resistance rises and reduces power of motor, and the length of the number of turn and wire increasing coil windings can increase cost and the body of motor Long-pending, therefore it is required that increase the number of turn and the length of the wire setting line footpath in the limited space of stator disc 2 as much as possible, preferably Method for winding is: winding clamp is excellent as plug with the triangle after chamfered, stacking coiling wire, the thus coil of coiling 3, its internal via shape is triangle, and outer loop-shaped is by the shape size of triangle plug, the line footpath of wire, the yield strength of wire And the combined influence such as winding tension resembles a pear in shape.

Analyze and experimental result based on air core coil external magnetic field, the area of coil hollow parts should be reduced as far as possible, and Hollow area is the least, and the outer loop-shaped of coil is closer to circle, can not make full use of the space of stator disc 2.The endoporus of coil 3 Should according to the number of coils of the line footpath of wire, the yield strength of wire, the size of stator disc 2 diameter, winding certainly with outer loop-shaped Fixed, through coiling repeatedly and test, the triangular inner hole of coil is positioned at the interior angle inside stator disc and is less than 60 °, triangular inner hole Radical length is less than the design of 1/3rd of the longest diameter of radial diameter of coil, can preferably meet stator disc 2 The requirement that space utilization and magnetic field are gathered to coil 3 center.

Disc type iron core-free direct current generator of the present invention, its prominent advantage has: 1) stator disc 2, inner ring rib 12, outer ring flange 13 can by high intensity, high-fire resistance, good moldability insulating material of polymer by molding one-shot forming, low cost can be realized high Efficiency produces；2) air core coil 3 using internal via shape to be triangle, coil 3 coiling back out circle shape is pyriform, and winding is fixed Space availability ratio in sub-disk 2 improves 20% than the air core coil 3 of circular inner hole, also improves the inductance value of winding simultaneously； 3) trim ring 15 of fixed coil 3, equally can be by the insulating material of polymer of high intensity, high-fire resistance, good moldability by molding Molding, trim ring 15, annular circuit board 8 and the inner ring rib 12 on stator, outer ring flange 13, limit the axial displacement of coil 3； 4) the fan-shaped permanent magnet 6 of Nd-Fe-B permanent magnet material, its radical length (the inside and outside semidiameter of sector electromagnet) is that the radial direction of coil 3 is straight Also leave gap between 0.5-0.8 times of footpath, and adjacent two panels permanent magnet 6, not only decrease the consumption of permanent magnet material, also carry The high high speed performance of motor, according to test and actual checking of riding, the electric property of motor is not because of permanent magnet 6 material Reduce and reduce；5) rotor disk is closely interlocked under the effect in two groups of permanent magnet 6 magnetic fields, need not take after installation again Other security measure, therefore can do the radial dimension of disc type iron core-free direct current generator of the present invention in limited wheel hub space Obtain bigger, and owing to two rotor disks are to be contained on axis 1 by two symmetrical bearing holder (housing, cover)s, have gear hub with presently commercially available Motor uses the structure of monolateral bearing fixed rotor to compare, and the circular runout of motor is less.

Disc type iron core-free direct current generator of the present invention, electric property is superior, except conventional motors simple in construction, reliable, Outside the advantages such as volume is little, lightweight, efficiency is high, good speed adjustment features, due also to have employed iron-core-free structure, motor weight saving, Overload capacity is strong, and no-load current is little and without magnetic hysteresis resistance, is installed in wheel hub, can install freewheel clutch, favorably In the installation accuracy improving epicyclic train；The disc rotor motor of the most flat bowl structure so that motor internal is enclosed in two In rotor disk, after the motor of the present invention is loaded wheel hub, planet circular system can use lubricating oil to be lubricated.

The disk permanent-magnet dc motor of the present invention, for electric bicycle, no-load current only has 0.3A, and advantage is the brightest Aobvious, under the situation that identical condition of riding, identical power consumption, pure electric power travel, its mileages of continuation ratio is in the market The mileages of continuation of the commonly used electric motor car having gear hub motor improves more than 35%, than the electricity using low speed wheel hub motor The mileages of continuation of motor-car improves more than 45%.Additionally present inventor's disk permanent-magnet dc motor to using the present invention Electric bicycle model machine verified, can by batch production requirement carry out, the Mold Making of indivedual important aspect is also entered Having gone effective trial, electric bicycle sample car fault-free has ridden more than 6,000 kilometer, and uses in certain specific experiment 48V18AH lithium battery group, has successfully carried out single charge and has ridden from Nanjing to the pure electronic overlength distance of Changzhou total length 119 kilometers Row test.

The above is only the preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims (8)

1. a disc type iron core-free direct current generator, it is characterised in that: include axis, described axis is cased with successively clutch shaft bearing, The first rotor dish and the second rotor disk, the first rotor it is cased with respectively on stator disc and the second bearing, clutch shaft bearing and the second bearing The inner side of dish and the second rotor disk is respectively equipped with the first groove, is provided with permanent magnet in the first groove, outside the first rotor dish with Sun gear gear ring is fixing to be connected, and exports moment of torsion by sun gear gear ring, and described stator disc is provided with the use of several annular spread In the pyriform hole of installation coil, coil is fixed in pyriform hole by stopping means, and coil is connected with core of a cable.

Disc type iron core-free direct current generator the most according to claim 1, it is characterised in that: described stopping means comprises inner ring gear Limit, outer ring flange, annular circuit board and trim ring, the one side of described stator disc is extended with inner ring rib and outer ring flange, stator disc Opposite side is provided with annular circuit board and trim ring, and annular circuit board is fixed on inside stator disc, and trim ring is positioned at outside stator disc, logical Cross the axial displacement of inner ring rib, outer ring flange, annular circuit board and trim ring limiting coil.

Disc type iron core-free direct current generator the most according to claim 2, it is characterised in that: described stator disc is away from inner ring rib One side be sequentially with three the second grooves, the second groove arrangement is positioned at the center of circle one of stator disc between adjacent two pyriform holes Side, installs Hall element in the second groove, the pin of Hall element welds with the annular circuit board being fixed on stator disc, Annular circuit board is connected with core of a cable.

Disc type iron core-free direct current generator the most according to claim 1, it is characterised in that: described coil for circle copper enamel-covered wire around The air core coil of system, its internal via shape is triangle, and the outer ring after coiling is naturally shaped as pyriform and matches with pyriform hole；Institute Stating the triangular inner hole of coil and be positioned at the interior angle inside stator disc less than 60 °, the radical length of triangular inner hole is less than coil / 3rd of the longest diameter of radial diameter.

Disc type iron core-free direct current generator the most according to claim 1, it is characterised in that: described the first rotor dish and second turn Sub-disk is made up of ferrous material, and its profile is flat bowl-shape, the bearing chamber of the first rotor dish within it, by being fixed on outside it Sun gear gear ring as bearing keep off；The bearing chamber position of the second rotor disk is partial to outside it and is provided with bearing gear.

Disc type iron core-free direct current generator the most according to claim 1, it is characterised in that: described the first rotor dish and second turn Sub-disk is by irony annulus and aluminium alloy or compound with engineering plastics makes, and its profile is flat bowl-shape, the bearing of the first rotor dish Room within it, is kept off as bearing by the sun gear gear ring being fixed on outside it；It is partial in the bearing chamber position of the second rotor disk Outside is also provided with bearing gear.

Disc type iron core-free direct current generator the most according to claim 1, it is characterised in that: described permanent magnet is fan-shaped neodymium iron boron Permanent magnet material, the inside and outside semidiameter of the most fan-shaped permanent magnet of its radical length is the 0.5-0.8 of the longest diameter of radial diameter of coil Times.

Disc type iron core-free direct current generator the most according to claim 1, it is characterised in that: described permanent magnet comprises several forever Magnet unit, leaves gap between two adjacent permanent magnets unit, the size in gap is adaptive with motor classical insulation.