CN208623519U - A kind of efficient axial flux permanent magnet motor of high power density - Google Patents
A kind of efficient axial flux permanent magnet motor of high power density Download PDFInfo
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- CN208623519U CN208623519U CN201821191747.XU CN201821191747U CN208623519U CN 208623519 U CN208623519 U CN 208623519U CN 201821191747 U CN201821191747 U CN 201821191747U CN 208623519 U CN208623519 U CN 208623519U
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Abstract
The utility model is a kind of efficient axial flux permanent magnet motor of high power density, which is single stator and double-rotor structure, and stator is located between two rotors, which includes stator core, rotor magnetic core, embedded special-shaped permanent magnet, threephase armature winding；The stator core is two-sided salient pole tooth slot structure；Each rotor includes rotor magnetic core and permanent magnet, and rotor magnetic core is annular shape, and along a number of permanent magnet that is radially inserted into of rotor magnetic core, permanent magnet is located at the inside of rotor magnetic core；In the annulus back surfaces of the rotor magnetic core for the position for being correspondingly embedded in permanent magnet, several backs that are radially provided with along rotor magnetic core are slotted；The region that several backs fluting is connected is defined as rotor yoke, and the direction of magnetization of several permanent magnets is along motor circumferential direction.There is the motor preferable magnetism-collected structure motor to be enabled to generate higher torque, is able to use oriented electrical steel and stator core and rotor magnetic core is made, so that motor performance is further improved.
Description
Technical field
The utility model relates to axial flux permanent magnet motor technical fields, and in particular to a kind of high power density is efficient
Axial flux permanent magnet motor.
Background technique
Axial flux permanent magnet motor is a kind of motor newly risen in recent years, compares conventional permanent magnet motor, has structure tight
The advantages that gathering, be high-efficient, power density is big.But existing axial flux permanent magnet motor structure simultaneously not perfect, the knot generallyd use
Configuration formula is durface mounted permanent magnet body form, and generated air gap flux density is lower, thus the performance of motor and not up to one compared with
Good degree.In addition, generalling use oOrdinary silicon steel sheet material in axial flux permanent magnet motor, fail to play this motor
Structural advantage.
Existing axial flux permanent magnet motor can be divided into the structure of no yoke portion iron core and have the structure of yoke portion iron core, both
Structure respectively has disadvantage, is unfavorable for the raising of motor performance.In the axial permanent magnetic motor of the structure of no yoke portion iron core, due to no yoke
Portion lower there are the stator structure intensity of the motor while manufacture difficulty is higher.In the axial permanent magnetic electricity for having yoke portion core structure
In machine, it since yoke portion takes part in magnetic conduction, therefore can only be made of isotropic silicon steel sheet, reduce the efficiency of motor.
Document CN201310088701 be a kind of conventional surface paste the unilateral axial flux permanent magnet motor of rotor, the motor due to
Using surface sticking structure, therefore its air gap flux density is lower, causes motor output torque lower, while the mechanical strength of the structure
Lower, when motor is in high-speed cruising, centrifugal force suffered by rotor permanent magnet is larger, easily causes motor damage.While by
In using single-side structural, unilateral magnetic force suffered by the motor is larger, is not easy to motor stabilizing operation.Document
CN201711060568 is that a kind of conventional surface pastes the bilateral axial flux permanent magnet motor of rotor, which uses double-sided rotor structure
Reduce unbalanced magnetic pull.However the patch rotor structure of surface used by the motor is not avoided that torque capacity is limited still,
The problems such as rotor structure intensity is not high.
Utility model content
The purpose of this utility model is to provide a kind of efficient axial flux permanent magnet motors of high power density, to solve
Technical problem present in above-mentioned background technique improves the power density and efficiency of axial-flux electric machine.The magneto has
Preferable magnetism-collected structure enables motor to generate higher torque, simultaneously because permanent magnet be embedded in rotor magnetic core have compared with
High rotor structure intensity, simultaneously because the motor that the utility model is proposed have only rise connection function but do not rise magnetic conduction work
Can stator core and rotor magnetic core easily be made using oriented electrical steel in yoke portion so that motor performance be able into
One step improves.
To achieve the goals above, the utility model takes following technical solution:
A kind of efficient axial flux permanent magnet motor of high power density, it is characterised in that the motor is single stator and double-rotor
Structure, i.e., there are two the identical rotor of structure and a stator, stator is located between two rotors, which includes stator magnet
Core, rotor magnetic core, embedded special-shaped permanent magnet, threephase armature winding；The stator core is two-sided salient pole tooth slot structure, stator
Magnetic core includes several stator tooths, is connected between several stator tooths by stator yoke, and it is fixed to be respectively provided between adjacent stators tooth
Pilot trench, the stator slot use parallel slot, are equipped with two groups of threephase armature windings in each stator slot, threephase armature winding is wrapped in
On stator tooth；
Each rotor includes rotor magnetic core and permanent magnet, and rotor magnetic core is annular shape, along being radially inserted into for rotor magnetic core
A number of permanent magnet, permanent magnet are located at the inside of rotor magnetic core；Rotor magnetic core in the position that is correspondingly embedded in permanent magnet
In annulus back surfaces, several backs that are radially provided with along rotor magnetic core are slotted；The region that several backs fluting is connected
It is defined as rotor yoke, the direction of magnetization of several permanent magnets is along motor circumferential direction, and two axially symmetric permanent magnet magnetization sides
To on the contrary, the adjacent permanent magnet direction of magnetization is opposite.
The utility model has the beneficial effects that
The substantive distinguishing features outstanding of the utility model are:
A) due to the magnetic flux path that axial flux permanent magnet motor is special in the utility model, in addition the stator yoke of the application
Structure (do not needed magnetic conduction effect and only played connection function) enables this motor to select orientation material, further increases motor
Performance.Stator yoke only plays connection function, is not involved in magnetic conduction effect, and stator core uses oriented electrical steel material, improves
The efficiency of motor；And stator yoke, which combines, traditional to be had yoke portion core structure and without yoke portion core structure, improves stator
The mechanical strength of magnetic core reduces stator core manufacture difficulty.In the axial-flux electric machine that tradition has stator yoke structure, yoke
Portion's structure is played the role of acting on for magnetic conduction, and cannot then oriented electrical steel be used to manufacture motor in this kind of motor.?
In axial-flux electric machine without yoke portion structure, although motor can be manufactured using oriented electrical steel, since no yoke portion is tied
Structure makes the fixation of stator more difficult.
B) since rotor magnetic core back region corresponding with permanent magnet is provided with back notching construction, motor matter is reduced
Amount reduces leakage field, improves electric efficiency.
C) due to permanent magnet, using special-shaped magnet structure, (two sides are mutually equal up and down in the tangential section of special-shaped permanent magnet
Row, and the length on upper and lower two sides differs), stronger poly- magnetic energy power is formed, the power density and efficiency of motor are greatly improved,
The mechanical strength of rotor is improved simultaneously.
D) it is made due to threephase armature winding of flat winding, keeps stator structure more compact, greatly improve stator
The copper factor of threephase armature winding, therefore improve the power density and efficiency of motor.
The marked improvement of the utility model is:
The efficient axial magnetic flux of a kind of high power density proposed with conventional axial flux electric machine ratio, the utility model
Rotor structure used by magneto is magneticfocusing insert structure, solves the air gap flux density of conventional axial flux electric machine
The lower problem of not high problem and rotor structure intensity.The special stator structure that the utility model is proposed simultaneously, both had
There is the characteristic of the magnetic circuit of single direction to enable motor that stator core is made using oriented electrical steel, while having and only playing connection work
The stator yoke structural strengthening structural stability of stator.Low, magnetic conductance is lost since the oriented electrical steel of use has
Poly-magnetic type rotor design feature used by the high feature combination motor of rate is not difficult to be inferred to the motor and conventional axial magnetic flux electricity
Machine compares power density with higher and efficiency, while structural stability is also preferable.
Detailed description of the invention
Fig. 1 is the schematic perspective view of the efficient axial flux permanent magnet motor of the utility model high power density.
Fig. 2 is the left view structural representation of the efficient axial flux permanent magnet motor of the utility model high power density.
Fig. 3 is the part-structure signal of the stator of the efficient axial flux permanent magnet motor of the utility model high power density
Figure.
Fig. 4 is the stereochemical structure of the stator core of the efficient axial flux permanent magnet motor of the utility model high power density
Schematic diagram.
Fig. 5 is the structural schematic diagram of the rotor of the efficient axial flux permanent magnet motor of the utility model high power density.
Fig. 6 is a kind of special-shaped permanent magnetism of embodiment of the efficient axial flux permanent magnet motor of the utility model high power density
The structural schematic diagram of body.
Wherein: 1- stator core；2- rotor magnetic core；3- permanent magnet；4- threephase armature winding；The back 5- fluting；6- stator
Yoke portion；7- rotor yoke.13- stator tooth, 12- stator slot,
Specific embodiment
Explanation is further explained to the utility model with embodiment with reference to the accompanying drawing, but is not constituted with this to this
The restriction of utility model protection range.
A kind of efficient axial flux permanent magnet motor of high power density of the utility model (abbreviation motor or magneto,
It is single stator and double-rotor structure referring to Fig. 1-5), i.e., there are two the identical rotor of structure and a stator, stator is located at two and turns
Between son, which includes stator core 1, rotor magnetic core 2, embedded special-shaped permanent magnet 3, threephase armature winding 4；The stator
Magnetic core is two-sided salient pole tooth slot structure, and stator core includes several stator tooths 13, passes through stator yoke between several stator tooths
Portion 6 connects, and stator slot 12 is respectively provided between adjacent stators tooth, and the stator slot uses parallel slot, i.e. the channel opening of stator slot is wide
Degree is equal everywhere, and two groups of threephase armature windings 4 are equipped in each stator slot, and threephase armature winding is wound on the stator teeth；
Each rotor includes rotor magnetic core 2 and permanent magnet 3, and rotor magnetic core is annular shape, and the radial direction along rotor magnetic core is embedding
Enter a number of permanent magnet 3, permanent magnet 3 is located at the inside of rotor magnetic core；Rotor magnetic in the position for being correspondingly embedded in permanent magnet
In the annulus back surfaces of core, several backs fluting 5 is radially provided with along rotor magnetic core；Several backs fluting is connected
Region is defined as rotor yoke, and the direction of magnetization of several permanent magnets is along motor circumferential direction, and two axially symmetric permanent magnet magnetics
Change contrary, the adjacent permanent magnet direction of magnetization is opposite.
Further, the stator core is rolled using oriented electrical steel material, adjacent stators between cog only tool
There is the yoke portion of type of attachment to be connected, stator yoke is not involved in magnetic conduction effect.The width of the stator yoke is greater than 1mm, Neng Goushi
While existing connection function, keep the mechanical stability of motor preferable.
Further, the rotor magnetic core is rolled using oriented electrical steel material.
Further, the direction of magnetization of the stator core and rotor magnetic core along motor axial direction, along the axis of motor
Keep motor performance more preferable to magnetization is carried out.
Further, the tangential section of the permanent magnet is trapezium structure, and trapezium structure is used in the side close to air gap
Short side uses long side in the side close to rotor yoke.
Further, the threephase armature winding uses flat winding.
The operation principle and process of the efficient axial flux permanent magnet motor of the utility model high power density is: motor fortune
When turning, stator stationary, rotor is along axial-rotation.Along the pole permanent magnet N, (permanent magnet goes out towards laundry polarity for N) magnetic line of force
Hair passes through stator teeth A, and being then passed through stator teeth A ', (wherein stator teeth A and A ' is axially symmetric relationship, is mutually located at and turns
The corresponding position of the sub- other side, the magnetic line of force do not reach adjacent stators teeth portion B by stator teeth A, not by stator yoke, therefore stator
Only play connection function in yoke portion), entering permanent magnet S pole later, (permanent magnet and aforementioned permanent magnet are axially symmetric, are located at different rotor
Same position, the permanent magnet towards laundry polarity be S), then from rotor yoke, into adjacent permanent magnet, then from this
Permanent magnet N sets out pole (permanent magnet towards laundry polarity be N), into stator teeth B '.Change is passed to since the magnetic circuit passes through
The threephase armature winding of galvanic current, therefore motor converts electrical energy into mechanical energy acting.
Special-shaped permanent magnet described in the utility model refers to tangential section structure in irregular shape, the abnormal shape permanent magnet
Tangential section in up and down two sides it is parallel to each other, and the length on upper and lower two sides differs；If tangential section shape is trapezoidal (ginseng
See Fig. 6) or approximate trapezoid structure, the permanent magnet of this structure has poly- magnetic effect, utilizes permanent magnetism physical efficiency by maximum, tool
Shape can as the case may be depending on.
The rotor of the utility model motor uses built-in permanent magnetic body structure, and permanent magnet can be placed in rotor magnetic core,
Rotor magnetic core forms preferable protective effect to rotor, and in addition the permanent magnet on rotor is special-shaped permanent magnet, be capable of forming compared with
Good magnetism-collected structure, so that the air gap flux density of motor is higher, the torque for greatly improving motor can.The stator of motor
Using the structure for connecting but not serving magnetic conduction as yoke portion using silicon steel sheet, which can make the motor using orientation silicon
Stator core is made in steel disc, and due to being connected using silicon steel sheet as stator yoke, the stator of the motor is an entirety, improves
The stability of stator structure.
Embodiment 1
The efficient axial flux permanent magnet motor of the present embodiment high power density, including it is rotor magnetic core 2, stator core 1, interior
Embedded abnormal shape permanent magnet 3, threephase armature winding 4.
The threephase armature winding 4 is to concentrate flat winding.The stator core 1 and rotor magnetic core 2 are all made of and roll
Manufacturing process, used material is oriented electrical steel, axial direction of the magnetic core direction of magnetization each along motor.The permanent magnet
3 direction of magnetizations are along motor circumferential direction.
For the motor using single stator and double-rotor structure, stator includes stator core and threephase armature winding two parts, is determined
Son matches with rotor internal-and external diameter.The stator core 1 is two-sided salient pole tooth slot structure, and stator core 1 includes 36 stator tooths,
It is stator slot between adjacent stators tooth, stator slot uses parallel slot structure, is equipped with two groups of threephase armature windings in each stator slot
4；The quantity of the permanent magnet 3 is 42, is radially embedded on rotor magnetic core 2 respectively, and two axially symmetric permanent magnet magnetics
Change contrary, the adjacent permanent magnet direction of magnetization is opposite.
As shown in figure 4, the stator core 1 uses parallel slot, parallel slot refers to that slot of the stator core at outer diameter is opened
Mouth is equal with the channel opening width of inner radius, enables to the winding on each stator tooth around obtaining more in this way, improves motor
Copper factor.Adjacent stators between cog is connected with the stator yoke 6 for being only not involved in magnetic conduction effect with type of attachment.Each group of three-phase
Armature winding divides across on the two sides of corresponding stator tooth, improves the failure tolerance of motor.
As shown in figure 5, each rotor includes rotor magnetic core 2 and permanent magnet 3, rotor magnetic core is annular shape, along rotor magnetic
Core is radially inserted into a number of permanent magnet 3, and permanent magnet 3 is located at the inside of rotor magnetic core；In the position for being correspondingly embedded in permanent magnet
In the annulus back surfaces for the rotor magnetic core set, 42 back flutings 5 are radially provided with along rotor magnetic core；36 backs fluting phases
The region of connection is defined as rotor yoke.
The tangential section of the permanent magnet 3 is trapezium structure, and trapezium structure uses short side in the side close to air gap, leaning on
The side of nearly rotor yoke 7 uses long side, and rotor yoke plays the part of connection and magnetic conduction on rotor magnetic core, to improve
The mechanical strength of rotor magnetic core 2, radially, the width of permanent magnet become larger from inside to outside；
The rotor magnetic core removes the part of rotor yoke and tangential section (tangential section of rotor tooth) shape of permanent magnet
Shape is similar, is all relatively narrow trapezoidal in upper bottom, the upper bottom (short side) of rotor magnetic core than the upper bottom (short side) of permanent magnet also than it is narrow.Permanent magnetism
Body 3 can be embedded in rotor magnetic core by radial direction.Permanent magnet is integrally embedded in rotor magnetic core, the special-shaped relatively narrow side surface of permanent magnet and
(lower surface shown in Fig. 5) surface is generally aligned in the same plane on the inside of rotor magnetic core, and rotor yoke face, permanent magnet height are close in broad side face
In addition rotor yoke height is equal to rotor axial length.
Following is the relative dimensions of the present embodiment magnetic flow permanent magnet motor:
Diameter of stator bore is 109mm
Stator outer diameter is 160mm
Rotor internal diameter is 109mm
Rotor diameter is 159mm
Stator yoke axial length is 1mm
Stator tooth axial length is 30mm
Stator tooth outside diameter teeth portion width is the interior outer radius not phase of 5deg (°) due to stator core, to keep stator slot
Internal-and external diameter width it is almost consistent, need to keep stator tooth internal-and external diameter side teeth portion of different size, i.e. the internal side diameter teeth portion of stator tooth is wide
Degree is greater than outside diameter teeth portion width,
Stator tooth internal side diameter teeth portion width 6.4deg,
Rotor yoke axial length is 1mm
Rotor magnetic core axial height is 11mm, and the rotor tooth axial height of rotor magnetic core is 10mm, i.e. rotor tooth+rotor yoke
The axial height in portion constitutes the axial height of rotor magnetic core,
(far from rotor yoke), inner radius width is 6deg on the downside of rotor tooth
Width 5deg at rotor tooth downside (far from rotor yoke) outer diameter, radially, the width of rotor tooth is from inside to outside
It becomes larger,
Inner radius width 0.8deg (at close rotor yoke) on the upside of rotor tooth
Axial air-gap length is 1.6mm
42 pairs of poles, 36 slots have 42 permanent magnets on single rotor, side will open 36 stator slots on stator,
Stator is two-sided salient pole tooth slot structure, 15 circle of winding in upper each stator slot of every one side, threephase armature winding
Winding cross section be rectangle, referred to the length of the rectangle of winding cross section and it is wide be respectively 5.6mm, 1.4mm
Permanent magnet is radially embedded in, and tangential section is trapezium structure, and relatively narrow close to stator side, circumferential width is
2.287mm, wider close to rotor yoke, circumferential width is about 6.916mm.Back fluting is rectangular channel, the size of back fluting
It is 2mm for circumferential lengths, radical length 48mm, groove depth is rotor yoke axial length, i.e. 1mm.
The performance of the present embodiment motor Yu common axial direction electric machine (no stator yoke axial flux permanent magnet motor) is given below
Comparison sheet, performance table
The present embodiment power of motor density is 15/27=0.556, efficiency 95% as can be seen from the above table；Common electricity
Machine power density is 10/23.3=0.429, efficiency 91%, (power density=output power/quality), therefore can obtain this implementation
Example motor possesses higher power density and higher efficiency.
The utility model does not address place and is suitable for the prior art.
Claims (5)
1. a kind of efficient axial flux permanent magnet motor of high power density, it is characterised in that the motor is single stator and double-rotor knot
Structure, i.e., there are two the identical rotor of structure and a stator, stator is located between two rotors, the motor include stator core,
Rotor magnetic core, embedded special-shaped permanent magnet, threephase armature winding；The stator core is two-sided salient pole tooth slot structure, stator magnet
Core includes several stator tooths, is connected between several stator tooths by stator yoke, is respectively provided with stator between adjacent stators tooth
Slot, the stator slot use parallel slot, two groups of threephase armature windings are equipped in each stator slot, and threephase armature winding is wrapped in fixed
On sub- tooth；
Each rotor includes rotor magnetic core and permanent magnet, and rotor magnetic core is annular shape, several along being radially inserted into for rotor magnetic core
The permanent magnet of quantity, permanent magnet are located at the inside of rotor magnetic core；In the annulus of the rotor magnetic core for the position for being correspondingly embedded in permanent magnet
In back surfaces, several backs that are radially provided with along rotor magnetic core are slotted；The region definition that several backs fluting is connected
For rotor yoke, the direction of magnetization of several permanent magnets is along motor circumferential direction, and two axially symmetric permanent magnet magnetization direction phases
Instead, the adjacent permanent magnet direction of magnetization is opposite.
2. the efficient axial flux permanent magnet motor of high power density according to claim 1, it is characterised in that described fixed
Sub- magnetic core is rolled using oriented electrical steel material, and the width of the stator yoke is greater than 1mm；The rotor magnetic core uses
Oriented electrical steel material rolls.
3. the efficient axial flux permanent magnet motor of high power density according to claim 1, it is characterised in that described fixed
The direction of magnetization of sub- magnetic core and rotor magnetic core along motor axial direction.
4. the efficient axial flux permanent magnet motor of high power density according to claim 1, it is characterised in that it is described forever
The tangential section of magnet is trapezium structure, and trapezium structure uses short side in the side close to air gap, close to the one of rotor yoke
Side uses long side.
5. the efficient axial flux permanent magnet motor of high power density according to claim 1, it is characterised in that described three
Phase armature winding uses flat winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821191747.XU CN208623519U (en) | 2018-07-26 | 2018-07-26 | A kind of efficient axial flux permanent magnet motor of high power density |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821191747.XU CN208623519U (en) | 2018-07-26 | 2018-07-26 | A kind of efficient axial flux permanent magnet motor of high power density |
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| CN208623519U true CN208623519U (en) | 2019-03-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108683313A (en) * | 2018-07-26 | 2018-10-19 | 河北工业大学 | A kind of efficient axial flux permanent magnet motor of high power density |
| CN108683313B (en) * | 2018-07-26 | 2024-07-02 | 河北工业大学 | High-power-density high-efficiency axial flux permanent magnet motor |
-
2018
- 2018-07-26 CN CN201821191747.XU patent/CN208623519U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108683313A (en) * | 2018-07-26 | 2018-10-19 | 河北工业大学 | A kind of efficient axial flux permanent magnet motor of high power density |
| CN108683313B (en) * | 2018-07-26 | 2024-07-02 | 河北工业大学 | High-power-density high-efficiency axial flux permanent magnet motor |
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