CN102684326B - Axial air-gap type motor - Google Patents

Axial air-gap type motor Download PDF

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Publication number
CN102684326B
CN102684326B CN201110059943.8A CN201110059943A CN102684326B CN 102684326 B CN102684326 B CN 102684326B CN 201110059943 A CN201110059943 A CN 201110059943A CN 102684326 B CN102684326 B CN 102684326B
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China
Prior art keywords
stator
motor shaft
disk body
housing
annular disk
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CN201110059943.8A
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CN102684326A (en
Inventor
曾学英
张文明
陈东锁
胡余生
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Abstract

The invention provides an axial air-gap type motor which comprises a casing, a motor shaft, a stator and rotors. The motor shaft penetrates out of the casing, the stator is located in the casing, the rotors are installed on the motor shaft and located on at least one side of the stator along the axial direction of the motor shaft, the stator comprises a non-magnetic disc winding former, and a motor shaft penetrating hole is arranged at the center of the disc winding former; a plurality of non-magnetic winding posts are circumferentially distributed on a first side of the disc winding former; and a plurality of windings are wound around the winding posts respectively. By means of a coreless stator structure, the axial air-gap type motor has the advantages of being simple in process and low in manufacturing cost.

Description

Axial air-gap motor
Technical field
The present invention relates to electric motors, more specifically, relate to a kind of axial air-gap motor.
Background technology
Axial air-gap motor, be a kind of vertically in the one or both sides of discoid stator across both motor of fixed gap configuration rotor.Compared with radial air gap type motor, axial air-gap motor has advantages of that the axial length of the comparable radial air gap type motor of axial length is short, is conducive to realize the slimming design of motor own.
In existing technology, the stator of axial air-gap motor has generally all been made core construction, this structure has multiple stator cores, each stator core center is wound with stator coil and forms magnetic core unit, all magnetic cores unit is connected and scrabbles up an annular by various convex-concave portions or special link are set on magnetic core unit, after be integrated by synthetic resin is molded and shaped again.In order to reduce core loss, each stator core is laminated along radial direction by multi-disc permeability magnetic material (as silicon steel sheet), and in order to be formed for holding the stator slot of coil windings, every permeability magnetic material width difference in a circumferential direction, increases to stator outer diameter gradually from center one side.
Have axial air-gap motor unshakable in one's determination for this class, owing to manufacturing, the shape of each magnetic core sheet material of stator is different, therefore needs the blanking die quantity of magnetic core sheet material more; And stator unshakable in one's determination is formed by connecting by multiple magnetic cores unit, between each magnetic core unit, connect and fastening complex process, each magnetic core unit need adopt plastic package structure to be shaped to one, required precision to plastic packaging is higher, and after plastic packaging, can not dismantle and recycle, thereby cause the manufacturing cost of axial air-gap motor high.In addition, the problem that has Axail air gap type motor unshakable in one's determination also to exist has, due to stator teeth notching, magnetic resistance between rotor and stator changes with the rotation of rotor, in this process because the attraction reaction force to direction of rotation produces cogging torque, when this cogging torque is large, produces and vibrate and noise, once the design of stator and rotor clearance plane is comparatively narrow, thereby vibration just likely makes rotor contact, stator causes breakage etc.In addition, due to the existence of stator core, make the interaction force between stator and rotor larger, motor precision in the time of assembling is difficult to ensure.
Summary of the invention
The present invention aims to provide a kind of axial air-gap motor, to solve the high problem of axial air-gap motor manufacturing cost of prior art.
According to a kind of axial air-gap motor provided by the invention, comprise: housing, the motor shaft passing from housing, be positioned at the stator of housing, and be installed on the rotor on motor shaft, rotor is along at least one side that is axially positioned at stator of motor shaft, and stator comprises: non-magnetic dish type winding former, and the center of dish type winding former has motor shaft and passes hole; Multiple non-magnetic wrapping posts, are circumferentially distributed in the first side of dish type winding former; Multiple windings, twine respectively and are located on each wrapping post.
Further, stator also comprises: multiple non-magnetic coiling baffle plates, are arranged on the free end of each wrapping post.
Further, multiple wrapping posts are distributed on dish type winding former, and each wrapping post and each coiling baffle plate are all fan-shaped.
Further, stator also comprises that lid is located at the non-magnetic lid in dish type winding former the first side, and lid comprises: the first annular disk body; The second annular disk body, is positioned at the inside of the first annular disk body, and it is corresponding that the endoporus of the second annular disk body and motor shaft pass hole, and the second annular disk body is connected with the first annular disk body by multiple ribs; Wherein, multiple ribs will be divided into the space of mating with multiple windings between the first annular disk body and the second annular disk body, multiple ribs week upwards with multiple concavo-convex cooperations of coiling baffle plate 54; Dish type winding former and lid one of are at least provided with line outlet groove.
Further, line outlet groove is three, is arranged on the first annular disk body; Each line outlet groove all radially extends, and middle part has bending.
Further, dish type winding former, multiple wrapping post and multiple coiling baffle plate are integrated injection mo(u)lding.
Further, housing comprises the first housing and the second housing that match, and the outward flange of stator is clamped in the holding tank of the first housing and the formation of the second housing.
Further, rotor comprises: insulated chassis, be arranged on motor shaft, and on insulated chassis, there is location notch; Permanent magnet, sticks in location notch, and the groove depth of location notch is less than the thickness of permanent magnet.
Further, stator both sides are all provided with rotor, and location notch is annular positioning groove; Permanent magnet comprises multiple permanent magnet units, and multiple permanent magnet units magnetize array arrangement in annular positioning groove according to Haier Bake.
Further, on motor shaft, there is the limited step for spacing insulated chassis.
According to axial air-gap motor of the present invention, because its stator has adopted multiple non-magnetic wrapping posts has been set on non-magnetic dish type winding former, multiple windings twine respectively the technical scheme being located on multiple wrapping posts, do not need stamping-out magnetic core sheet material and carry out fastening to magnetic core unit, and be non-magnetic material because of the material of dish type winding former and wrapping post, can not produce core loss, greatly simplify manufacturing process and the manufacturing cost of stator, thereby provide a kind of technique axial air-gap motor simple, with low cost.
Brief description of the drawings
The accompanying drawing that forms a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 has schematically shown the cross-section structure of axial air-gap motor of the present invention;
Fig. 2 has schematically shown the decomposition texture of axial air-gap motor of the present invention;
Fig. 3 has schematically shown the stereochemical structure of dish type winding former, wrapping post and winding in the present invention;
Fig. 4 has schematically shown the stereochemical structure of lid in the present invention;
Fig. 5 has schematically shown the decomposition texture of stator in the present invention;
Fig. 6 has schematically shown the decomposition texture of rotor of the present invention; And
Fig. 7 has schematically shown three kinds of arrangement modes of rotor of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Referring to Fig. 1 and Fig. 2, show the preferred embodiment according to a kind of axial air-gap motor provided by the invention, as shown in the figure, this axial air-gap motor comprises: housing 10, motor shaft 30, stator 50 and rotor 70.
As can be seen from Figure, motor shaft 30 is by passing in housing 10, for exporting rotary driving force; Stator 50 is positioned at the middle part of housing 10 setting vertical with motor shaft 30; Rotor 70 is positioned at housing 10, and after separating vertically set space between stator 50 at right angle setting on motor shaft 30.In the present embodiment, rotor 70 is two, is distributed in the two ends of stator 50.
In conjunction with reference to figure 3, can find out, stator 50 comprises: be substantially discoidal insulation winding former 51, dish type winding former 51 center has motor shaft and passes hole 56, motor shaft 30 passes hole 56 and passes from motor shaft, and the diameter that motor shaft passes hole 56 is greater than the diameter of motor shaft 30, not affect the rotation of motor shaft 30; Multiple wrapping posts 53, are circumferentially distributed in the first side of dish type winding former 51; Multiple windings 55, twine respectively and are located on each wrapping post 53, each wrapping post and twine the winding 55 being located on this wrapping post and form a coiling unit.Like this, according to axial air-gap motor of the present invention, because stator 50 has adopted, multiple non-magnetic wrapping posts 53 are set on non-magnetic dish type winding former 51, multiple windings 55 twine respectively the technical scheme being located on multiple wrapping posts 53, do not need stamping-out magnetic core sheet material and carry out fastening to magnetic core unit, manufacturing process and the manufacturing cost of stator are greatly simplified, and be non-magnetic material because of the material of dish type winding former and wrapping post, can not produce core loss, thereby provide a kind of technique axial air-gap motor simple, with low cost.In the present embodiment, non-magnet material can be for example plastics, copper, aluminium, zinc, chromium etc.
By finding out in Fig. 3, stator 50 also comprises further: multiple non-magnetic coiling baffle plates 54, are arranged on the free end of each wrapping post 53.Like this, on the one hand, respectively wind the line and formed and be convenient to roll off the production line and twine the flute profile space of establishing winding between baffle plate 54 and insulation winding former, on the other hand, coiling baffle plate 54, after twining in the process of establishing winding and winding is wrapped in wrapping post 53, all can play and prevent that winding 55 from skidding off the effect of wrapping post 53.Preferably, multiple wrapping posts 53 are distributed on dish type winding former 51, and each wrapping post 53 and each coiling baffle plate 54 be all fan-shaped, so that stator has good service behaviour.Easily learn, be located on each wrapping post 53 for each winding 55 can successfully be twined all there is certain gap between every two adjacent coiling baffle plates 54.Preferably, dish type winding former 51, multiple wrapping post 53 are integrated injection mo(u)lding with multiple coiling baffle plates 54, for example can adopt the good plastics of insulation property and epoxy resin material thermoplastic one-body molded, material range of choice is wide like this, make comparatively cheaply, and the structure of integral type is fixed and locates dish type winding former 51 in coiling process.
Referring to Fig. 4 and Fig. 5, preferably, stator 50 also comprises further: lid 57, lid is located in the first side of dish type winding former 51.This lid 57 comprises: the first annular disk body 57a; The second annular disk body 57b, is positioned at the inside of the first annular disk body 57a, and it is corresponding that endoporus 58 and the motor shaft of the second annular disk body 57b passes hole, and power supply arbor passes; The second annular disk body 57b is connected with the first annular disk body 57a by multiple rib 57c.Wherein, multiple rib 57c will be divided into the space of mating with multiple windings 55 between the first annular disk body 57a and the second annular disk body 57b, multiple rib 57c week upwards with multiple concavo-convex cooperations of coiling baffle plate 54.In addition, dish type winding former 51 and lid 57 one of are at least provided with line outlet groove 59, after passing, are connected with extraneous power supply for winding leading-out wire.When to each wrapping post 53 after complete line, by lid 57 be buckled in insulation winding former 51 on, just can form box structure, thereby winding 55 is fixedly contained in to the inner chamber of this box structure.Preferably, line outlet groove 59 is three, is arranged on the first annular disk body 57a; Each line outlet groove 59 all radially extends, and middle part has bending.Like this, winding leading-out wire is buried in corresponding line outlet groove 59, can prevent that winding leading-out wire from contacting and wearing and tearing with housing, and line outlet groove 59 middle part dogleg section are for strengthening the tensile strength of winding leading-out wire.In addition, as can be seen from Figure, in the inner periphery and the outer periphery of insulation winding former 51 and lid 57, all offer porose, together with the winding former 51 that makes to insulate can be bolted with lid 57.
Preferably, housing 10 comprises between the first housing 11 of matching and the second housing 13, the first housings 11 and the second housing 13 and is formed with a holding tank, and the outward flange that is the stator 50 of box structure is clamped in holding tank.Like this, just do not need extra stator positioner to locate stator.As can be seen from Figure, the position that the first housing 11 and the second housing 13 form holding tank all offers axial hole, bolt 90 through the first housing 11, lid 57, insulation winding former 51 and the first housing 13 is successively installed in hole, thereby housing 10 and stator 50 are connected and fixed.
Referring to Fig. 6, preferably, rotor 70 comprises: insulated chassis 71, be arranged on motor shaft 30, and on insulated chassis 71, there is location notch 71a; Permanent magnet 73, sticks in location notch 71a, and as can be seen from Figure, permanent magnet 73 comprises the permanent magnet unit that polylith is little, and each permanent magnet unit for example affixes in location notch 71a by anaerobic adhesive.The groove depth of location notch 71a is less than the thickness of permanent magnet 73, be that each permanent magnet unit only has part to be contained in location notch 71a, location notch 71a has played location and has prevented the effect that each permanent magnet unit slides in each permanent magnet unit taping process, is convenient to the installation of each permanent magnet unit.Preferably, on motor shaft 30, there is the limited step 31 for spacing insulated chassis 71, like this, axial air-gap motor of the present invention is in assembling process, just can locate preferably the position of two rotors 70 without extra positioning tool, thus the spacing between guarantee two rotors and the spacing between each rotor and stator.
Can find out in conjunction with Fig. 6 and Fig. 7, location notch 71a is annular positioning groove further, stator 50 both sides are provided with rotor 70, the permanent magnet unit 73 of each rotor 70 is all arranged in annular positioning groove according to the halbach array (Haier magnetize Bake array) that magnetizes, multiple permanent magnet units in each rotor are pieced together in aggregates sticking in annular positioning groove along central shaft annular and (in Fig. 7, have only been schematically shown part permanent magnet unit), make between two rotors, to there is the variation magnetic flux along motor shaft 30 directions, the magnetic field intensity of the more common arrangement of magnetic field intensity of the each permanent magnet unit permanent magnet that arrayed forms that adopts halbach to magnetize is strong.
The permanent magnet that in Fig. 7, the left side the first width illustrates stator both sides rotor all adopts the mode of the halbach90 ° of array arrangement that magnetizes, and corresponding its magnetic pole of permanent magnet of upper and lower rotor is heteropole, thereby produces along the axial magnetic flux of motor.The permanent magnet that in Fig. 7, the left side the second width there is shown stator both sides rotor all adopts the execution mode of the halbach60 ° of array arrangement that magnetizes, and the permanent magnet that in Fig. 7, the right the first width illustrates stator both sides rotor all adopts the execution mode of the halbach45 ° of array arrangement that magnetizes.Certainly, in reality, the array that magnetizes of permanent magnet is not limited to above-mentioned three kinds of arrays that magnetize.
Illustrate axial air-gap motor installation step according to the preferred embodiment of the invention below in conjunction with Fig. 2:
1) rotor 70 in stator 50 belows (be called for short lower rotor part 70) is placed in to the below of motor shaft 30, make the endoporus 75 of motor shaft 30 through lower rotor part 70, until the upper surface of lower rotor part 70 contacts with limited step corresponding on motor shaft 30, then lower snap ring 91 is stuck on motor shaft 30, makes lower snap ring 91 play the effect of fixing lower rotor part 70;
2) stator 50 is placed in to the top of motor shaft 30, motor shaft 30 passes hole through the motor shaft of stator 50;
3) rotor 70 in stator 50 tops (be called for short upper rotor part 70) is placed in to the top of stator 50, makes the endoporus 58 of motor shaft 30 through upper rotor part 70, until the lower surface of upper rotor part 70 contacts with limited step 31 corresponding on motor shaft 30.Then upper snap ring 92 is stuck on motor shaft 30, makes snap ring 92 play the effect of fixing upper rotor part 70.Now stator 50 is between upper rotor part 70 and lower rotor part 70;
4) lower house 13 is placed in to the below of lower rotor part 70, make motor shaft 30 through the endoporus of lower bearing to the lower bearing room 93 of lower house 13;
5) upper shell 11 is placed in to the top of upper rotor part 70, make motor shaft 30 through the endoporus of upper bearing (metal) to the upper bearing (metal) chamber 94 of upper shell 11;
6) upper shell 11, lower house 13 and stator 50 are fixed by bolt 90, nut.
In sum, according to axial air-gap motor of the present invention, there is following effect:
1) because parts, the rotor parts except permanent magnet of stator except winding all adopt non-magnet material, the cost that can save magnetic core material and make, especially reduced the cost of manufacture of stator, do not adopt in addition after stator core, can greatly reduce the weight of motor, can also eliminate iron loss, improve electric efficiency;
2) adopt dish type winding former, multiple wrapping post and be arranged on the insulation barrier insulating outside terminal as each coiling unit; Lid is fastened on insulation winding former, fits in a box structure, thereby winding is sealed in annular seal space with dish type winding former, reaches the object of fixed stator winding.Compared with the method that forms stator with the direct plastic packaging of winding in prior art, technique is more simple, quick detachable and can recycle, and especially, in prototype fabrication process, cost advantage is more obvious;
3) dish type winding former, multiple wrapping post and be arranged on the insulation barrier of insulation outside terminal and adopt thermoplastic one-body molded, lid also adopts the mode of thermoplastic shaping, and compared with the mode of the direct plastic packaging of winding, material range of choice is wider, production process is comparatively simple, and quick detachable and recycling;
4) because each permanent magnet unit of permanent magnet adopts the halbach array that magnetizes in rotor, and the permanent magnet unit size of different magnetizing directions is different, halbach array is more obvious at the magnet accumulating cap of air gap side like this, can improve better the air gap flux density of motor, thereby offset the negative influence that non iron-core brings, halbach array can also weaken the magnetic disturbance between motor and the external world in the magnetic screening action of non-air gap side in addition.The space of the holding portion permanent magnet arranging on rotor has been played location and has prevented the effect that permanent magnet slides in permanent magnet taping process.
These are only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (6)

1. an axial air-gap motor, comprising:
Housing (10),
The motor shaft (30) passing from described housing (10),
Be positioned at the stator (50) of described housing (10), and
Be installed on the rotor (70) on described motor shaft (30), described rotor (70) is along at least one side that is axially positioned at described stator (50) of described motor shaft (30),
It is characterized in that, described stator (50) comprising:
Non-magnetic dish type winding former (51), the center of described dish type winding former (51) has motor shaft and passes hole;
Multiple non-magnetic wrapping posts (53), are circumferentially distributed in the first side of described dish type winding former (51);
Multiple windings (55), twine respectively and are located on each described wrapping post (53);
Multiple non-magnetic coiling baffle plates (54), are arranged on the free end of each described wrapping post (53); Described dish type winding former (51), described multiple wrapping posts (53) are integrated injection mo(u)lding with described multiple coiling baffle plates (54);
Described stator also comprises that lid is located at the non-magnetic lid (57) in described dish type winding former (51) first sides, and described lid (57) comprising: the first annular disk body (57a);
The second annular disk body (57b), be positioned at the inside of described the first annular disk body (57a), it is corresponding that the endoporus of described the second annular disk body (57b) and described motor shaft pass hole, and described the second annular disk body (57b) is connected with described the first annular disk body (57a) by multiple ribs (57c);
Wherein, described multiple ribs (57c) will be divided into the space of mating with described multiple windings (55) between described the first annular disk body (57a) and described the second annular disk body (57b), described multiple ribs (57c) week upwards with concavo-convex cooperation of described multiple coiling baffle plates (54);
Described dish type winding former (51) and described lid (57) are provided with line outlet groove (59) on one of at least;
Wherein, described line outlet groove (59) is three, is arranged on described the first annular disk body (57a) upper, and each described line outlet groove (59) all radially extends, and middle part has bending.
2. axial air-gap motor according to claim 1, is characterized in that, it is upper that described multiple wrapping posts (53) are distributed on described dish type winding former (51), and each described wrapping post (53) and each described coiling baffle plate (54) are all fan-shaped.
3. axial air-gap motor according to claim 1, it is characterized in that, described housing (10) comprises the first housing (11) and the second housing (13) that match, and the outward flange of described stator (50) is clamped in the holding tank of described the first housing (11) and described the second housing (13) formation.
4. axial air-gap motor according to claim 1, is characterized in that, described rotor (70) comprising: insulated chassis (71), be arranged on described motor shaft (30) upper, and on described insulated chassis (71), there is location notch (71a); Permanent magnet (73), sticks in described location notch, and the groove depth of described location notch is less than the thickness of described permanent magnet.
5. axial air-gap motor according to claim 4, is characterized in that, described stator (50) both sides are all provided with described rotor (70), and described location notch is annular positioning groove; Described permanent magnet (73) comprises multiple permanent magnet units, and described multiple permanent magnet units magnetize array arrangement in described annular positioning groove according to Haier Bake.
6. axial air-gap motor according to claim 4, is characterized in that, has the limited step (31) for spacing described insulated chassis (71) on described motor shaft (30).
CN201110059943.8A 2011-03-11 2011-03-11 Axial air-gap type motor Active CN102684326B (en)

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CN104167893B (en) * 2013-05-17 2018-11-02 胡宪文 Axial flux generator
CN104218706A (en) * 2014-09-03 2014-12-17 洛阳市贝叶机电有限公司 Yoke and shaft mounting structure for permanent magnet coreless motor
CN106230211A (en) * 2016-09-09 2016-12-14 哈尔滨工程大学 H type monolateral concentrated magnetic Hot Spare flywheel energy storage sends out all-in-one with dynamic
CN109391058B (en) * 2018-10-11 2020-11-27 大连海事大学 Pluggable composite disc type permanent magnet brushless motor structure
CN110635640A (en) * 2019-09-26 2019-12-31 天津市泓星电动汽车动力总成有限公司 Yoke-free split disc type motor

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