CN207442555U - Rotor assembly and magneto - Google Patents
Rotor assembly and magneto Download PDFInfo
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- CN207442555U CN207442555U CN201720735494.7U CN201720735494U CN207442555U CN 207442555 U CN207442555 U CN 207442555U CN 201720735494 U CN201720735494 U CN 201720735494U CN 207442555 U CN207442555 U CN 207442555U
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Abstract
The utility model provides a kind of rotor assembly and magneto.The rotor assembly includes rotor core (1), it is circumferentially spaced on rotor core (1) to be provided with multiple mounting grooves (2), permanent magnet (3) is provided in mounting groove (2), the polarity of each permanent magnet (3) towards rotor outer periphery edge is same polarity, adjacent mounting groove (2) is spaced apart by soft magnetic materials, the first air groove (4) is respectively provided on the both ends of mounting groove (2) and its circumferential direction between adjacent soft magnetic materials, there are two the second air grooves (5) close to the setting of the one side of rotor core (1) outer peripheral edge for mounting groove (2), one the second air groove (5) is arranged on the first end of mounting groove (2), another the second air groove (5) is arranged on the second end of mounting groove (2), and two air grooves extend towards.Rotor assembly according to the present utility model can form larger magnetic flux density in air gap, improve motor and contribute, promote electric efficiency, and can reduce the torque ripple in motor operation course.
Description
Technical field
The utility model belongs to motor device technical field, and in particular to a kind of rotor assembly and magneto.
Background technology
Conventional permanent magnet motor, such as 8 pole permanent magnet motors have 8 groups of permanent magnets, around rotor center along direction of rotation cloth
It puts, and adjacent permanent magnet has the different direction of magnetizations.Pass through stator core from the magnetic line of force of one piece of permanent magnet N pole
Reach the S poles of adjacent permanent magnet.One magnetic line of force is in the loop at least across two permanent magnets, and therefore, permanent magnet, which utilizes, not to be filled
Point, and therefore cause motor cost higher.
A kind of Consequent pole permanent magnet motor is proposed in the prior art, still by taking 8 pole motors as an example, only 4 permanent-magnet poles thereon,
And adjacent permanent magnet has identical direction of magnetization length.Have permanent magnet mounting groove is known as permanent-magnet pole, two permanent magnets
Soft magnetic materials between mounting groove is magnetized by permanent-magnet pole with having the polarity opposite with permanent-magnet pole, because being referred to herein as alternately pole permanent magnetism
Motor.
Although this motor can significantly reduce permanent magnet usage amount, so as to which motor cost be greatly reduced, due to phase
The difference of adjacent pole material, if be designed according to conventional motor, then can not form larger air gap magnetic on alternately extremely
It is close, cause motor undercapacity, and since the asymmetry of the air gap flux density under adjacent pole generates in motor operation course
Very big torque pulsation.
Utility model content
Therefore, the technical problems to be solved in the utility model is to provide a kind of rotor assembly and magneto, being capable of shape
Into larger air gap flux density, increase motor and contribute, and significantly reduce the torque ripple in motor operation course.
To solve the above-mentioned problems, the utility model provides a kind of rotor assembly, including rotor core, edge on rotor core
Multiple mounting grooves have been provided at circumferentially spaced, permanent magnet is provided in mounting groove, the polarity of each permanent magnet towards rotor outer periphery edge is
Same polarity, adjacent mounting groove are spaced apart by soft magnetic materials, the both ends of the mounting groove soft magnetism material adjacent in its circumferential direction
It is respectively provided with the first air groove between material, mounting groove is set close to the one side of rotor core outer peripheral edge there are two the second air groove, and one
A second air groove is arranged on the first end of mounting groove, another the second air groove is arranged on the second end of mounting groove, and two
Air groove extends towards.
Preferably, the first air groove extends inwardly from the outer rim of rotor core；Or, first air groove be located at rotor core
Outer peripheral edge on the inside of.
Preferably, the second air groove extends inwardly from the outer rim of rotor core, and the second air groove and the first air groove connect
Lead to and be spaced with mounting groove；Or, second air groove be located on the inside of rotor core outer peripheral edge, and connected with mounting groove in end；
Or, second air groove be located on the inside of rotor core outer peripheral edge, and separated with mounting groove.
Preferably, mounting groove is yi word pattern or V-shaped.
The soft magnetic materials being preferably located between two adjacent mounting grooves forms alternately pole, the circumferential direction of same alternately pole
The minimum angle that the line of centres of two first air grooves at both ends and rotor core is formed is b, same mounting groove corresponding two
The minimum angle that the line of centres of a second air groove and rotor core is formed be a, 0.8≤b/a≤1.1.
Preferably, the thickness of the direction of magnetization of permanent magnet is t, and the depth of the first air groove is d, and depth is from the first air
Slot near the position at rotor shaft center to the radial distance of rotor core outer peripheral edge, wherein, 0.5t≤d≤2t.
Preferably, the second air groove has the width w1 on radially, and the second air groove is close to mounting groove one side
The distance between outer peripheral edge of edge and rotor core is w2, wherein 0.9≤w1/w2≤1.1.
Preferably, two outermost ends of the permanent magnet in same mounting groove close to the second air groove one side connect with rotor center
Line forms angle c, wherein 0.7≤a/c≤1.
Preferably, non-magnet material is filled in the second air groove.
Preferably, the permanent magnet quantity in each mounting groove is greater than or equal to 1.
Preferably, rare earth element is contained in permanent magnet.
Another aspect according to the present utility model provides a kind of magneto, and including rotor assembly, which is
Above-mentioned rotor assembly.
Preferably, magneto further includes stator, and stator is set in outside rotor assembly, and the inner circumferential side of stator has along fixed
The tooth being circumferentially arranged of son, rotor assembly is arranged in the circular void that tooth surrounds, and can non-contiguously be rotated relative to tooth.
Rotor assembly provided by the utility model, including rotor core, on rotor core it is circumferentially spaced be provided with it is multiple
Mounting groove, is provided with permanent magnet in mounting groove, and the polarity of each permanent magnet towards rotor outer periphery edge is same polarity, adjacent installation
Slot is spaced apart by soft magnetic materials, and the first air is respectively provided between adjacent soft magnetic materials on the both ends of mounting groove and its circumferential direction
Slot, mounting groove are set close to the one side of rotor core outer peripheral edge there are two the second air groove, and second air groove is arranged on peace
The first end of tankage, another the second air groove is arranged on the second end of mounting groove, and two air grooves extend towards.Due to forever
Magnet mounting groove is provided with the second air groove close to the one side both ends of rotor core outer peripheral edge, on the one hand this second air groove changes
Magnetic flux face width when permanent-magnet pole is towards air gap, on the other hand forms air groove at the both ends of permanent-magnet pole, by adjusting alternately
Pole-face both makes to reach best fit to the magnetic flux face width of air gap and the magnetic flux face width of permanent-magnet pole towards air gap, not only can be with
The output torque of motor, improving performance are promoted, and the asymmetry of adjacent pole magnetic flux density waveforms can be improved, reduces torque ripple
It is dynamic, increase motor and contribute, improve motor working performance.
Description of the drawings
Fig. 1 is the structure diagram of the rotor assembly of the utility model first embodiment；
Fig. 2 is the structure diagram of the rotor assembly of the utility model second embodiment；
Fig. 3 is the structure diagram of the rotor assembly of the utility model 3rd embodiment；
Fig. 4 is the structure diagram of the rotor assembly of the utility model fourth embodiment；
Fig. 5 is the structure diagram of the magneto of the utility model embodiment；
Fig. 6 is the gas under a pair of of magnetic pole in air gap magnetic density waveform and the present embodiment under a pair of of magnetic pole of the prior art
Gap magnetic flux density waveforms compare figure；
Fig. 7 is the graph that electromagnetic torque changes with torque pulsation with a/b.
Reference numeral is expressed as：
1st, rotor core；2nd, mounting groove；3rd, permanent magnet；4th, the first air groove；5th, the second air groove；6th, alternating pole；7th, it is fixed
Son；8th, tooth；9th, it is open.
Specific embodiment
With reference to shown in referring to Fig. 1 to Fig. 7, embodiment according to the present utility model, rotor assembly includes rotor core 1, turns
It is circumferentially spaced on sub- iron core 1 to be provided with multiple mounting grooves 2, it is provided with permanent magnet 3 in mounting groove 2, each permanent magnet 3 is towards rotor
The polarity of outer peripheral edge is same polarity, and adjacent mounting groove 2 is spaced apart by soft magnetic materials, both ends and its circumferential direction side of mounting groove 2
The first air groove 4 is respectively provided between adjacent soft magnetic materials upwards, mounting groove 2 is set close to the one side of 1 outer peripheral edge of rotor core
There are two the second air groove 5, second air groove 5 is arranged on the first end of mounting groove 2, another second air groove 5 is set
In the second end of mounting groove 2, and two air grooves extend towards.
Since the mounting groove 2 of permanent magnet is opened close to the one side both ends of 1 outer peripheral edge of rotor core there are two the second air groove 5,
Magnetic flux face when this 5 one side of the second air groove changes permanent-magnet pole that the permanent magnet 3 in mounting groove 2 is formed towards air gap is wide
Degree, on the other hand form air groove at the both ends of permanent-magnet pole, by adjusting alternately magnetic flux face width from pole-face to air gap with forever
The magnetic flux face width of magnetic pole towards air gap makes the two reach best fit, can not only promote the output torque of motor, enhancing
Can, and the asymmetry of adjacent pole magnetic flux density waveforms can be improved, torque ripple is reduced, increases motor and contributes, improve motor work
Make performance.
In the present embodiment, the soft magnetic materials between two adjacent mounting grooves 2 forms alternately pole 6, same alternating
The minimum angle that two first air grooves 4 at the circumferential both ends of pole 6 and the line of centres of rotor core 1 are formed is b, same installation
The minimum angle that the line of centres of the second air grooves of slot 2 corresponding two 5 and rotor core 1 is formed is a, 0.8≤b/a≤
1.1.When the scope of b/a meets above-mentioned requirements, it is ensured that the torque of rotor core 1 be maintained at it is one higher numerically,
The electromagnetic torque fluctuation of magneto is very small simultaneously, can reduce the noise generated in motor operation course, while improve electricity
The output power of machine.
Since adjacent pole material is different, structure is different, if be designed according to Conventional permanent magnet motor, i.e. alternately pole
With permanent-magnet pole towards as air gap yoke length, then there are the asymmetric problems of counter potential waveform.Solid line in Fig. 6 is existing skill
The air gap magnetic density waveform under a pair of of magnetic pole in art, the solid line amplitude are formed in motor operation course there are serious asymmetry
Larger torque ripple.And groove and notch are added in the present embodiment, it can effectively adjust the air gap flux density under consecutive roots
Symmetry reduces torque pulsation, and can improve the electromagnetic torque of motor, as shown in phantom in FIG..Electromagnetism when Fig. 7 changes for a/b
Torque and the change curve of torque pulsation, wherein s1 are the change curve of electromagnetic torque, and s2 is the change curve of torque pulsation, from
It can be seen from the figure that reaches minimum torque pulsation at 0.91, and reaches maximum electromagnetic torque at 0.96.
The thickness of the direction of magnetization of permanent magnet 3 is t, and the depth of the first air groove 4 is d, and depth is from the first air groove 4
Near the position at rotor shaft center to the radial distance of 1 outer peripheral edge of rotor core, due to position existing for the first air groove 4
Quadrature axis inductance can be largely influenced, when the value of d is larger, quadrature axis inductance can strongly reduce, smaller quadrature axis inductance
Larger torque pulsation can be caused, it is therefore desirable to rational that d values are set.Preferably, in the present embodiment, 0.5t≤d≤2t.
There is first air groove 4 suitable depth d to be conducive to the alternately arrangement of pole 6 flux, and larger magnetic is formed in air gap
Lines of force density improves motor and contributes.
Another aspect permanent magnetism is there are brow leakage, and this phenomenon can well weaken by adjusting the value of d.
Preferably, the second air groove 5 has the width w1 on radially, and the second air groove 5 is close to 2 one side of mounting groove
The distance between the outer peripheral edge of edge and rotor core 1 be w2, wherein 0.9≤w1/w2≤1.1.If w1 values are too small, then
Leakage magnetic flux can increase, if w1 values are excessive, then magnetic resistance when permanent magnet is towards air gap can increase, and influence motor output.It will
W1 is associated with w2, and limits proportionate relationship between the two, it becomes possible to effectively be reduced leakage magnetic flux, while can be ensured electricity
Machine is contributed.
Preferably, the permanent magnet 3 in same mounting groove 2 is in two outermost ends of 5 one side of the second air groove and rotor
Heart line forms angle c, wherein 0.7≤a/c≤1.The study found that although there are an optimal proportion between a and b, it is false
Such as the angle too small of a, serious magnetic saturation can occur towards the part of air gap in permanent-magnet pole, reduce motor and contribute.Therefore, it is necessary to
The angle of a is defined by angle c, so that a can preferably be met the requirements.
Preferably, punching intensity, limitation permanent magnet movement can be increased filled with non-magnet material in the second air groove 5.
Preferably, for 3 quantity of permanent magnet in each mounting groove 2 more than or equal to 1, the quantity of the permanent magnet 3 in mounting groove 2 can
Think 1,2 or 3 etc..
Preferably, rare earth element is contained in permanent magnet 3.The study found that since the magnetite containing rare earth element is with higher
Remanent magnetism and coercivity, therefore alternately compared to conventional motor, generally there are undercapacities and anti-demagnetization in the electric machine structure of pole
The problem of scarce capacity, therefore alternately pole motor is more suitable for the magnetite containing rare earth element.
With reference to shown in Figure 1, first embodiment according to the present utility model, the first air groove 4 is outside rotor core 1
Edge extends inwardly, and the second air groove 5 is located on the inside of 1 outer peripheral edge of rotor core, and is connected with mounting groove 2 in end, and first is empty
Interval is formed between 4 and second air groove 5 of air drain.In the present embodiment, mounting groove 2 is yi word pattern, correspondingly, permanent magnet 3
For whole yi word pattern.Such structure can significantly reduce permanent magnet usage amount, reduce motor cost, and go out with larger
Power and smaller torque pulsation.
With reference to shown in Figure 2, second embodiment according to the present utility model, the first air groove 4 is outside rotor core 1
Edge extends inwardly, and the second air groove 5 extends inwardly from the outer rim of rotor core 1, the second air groove 5 and the first air groove 4
It connects and is spaced with mounting groove 2.In the present embodiment, second air groove 5 at permanent magnet both ends is connected into the first air groove 4
It is integrated, forms one section of magnetic bridge between the second air groove 5 respectively at the both ends of permanent magnet 3, and permanent-magnet pole can be adjusted
Towards the length of air gap.The structure of the rotor assembly is simpler, is conducive to simplify the processing technology of rotor assembly.
With reference to shown in Figure 3,3rd embodiment according to the present utility model, the first air groove 4 is located at rotor core 1
On the inside of outer peripheral edge, the second air groove 5 is located on the inside of 1 outer peripheral edge of rotor core, and is separated with mounting groove 2.In the present embodiment, forever
Second air groove 5 at 3 both ends of magnet is changed to not connect with the connected state of the mounting groove 2 of permanent magnet 3, and centre is connected by reinforcing rib
It connects.And also be located in permanent-magnet pole with replacing the first air groove 4 between pole on the inside of rotor outer periphery edge, it is not extended to rotor outer periphery
Edge.It according to the rotor assembly of the present embodiment, can effectively enhance rotor mechanical strength, reduce the prominent of rotor outer periphery edge air gap flux density
Become.
It is essentially identical with first embodiment with reference to shown in Figure 4, fourth embodiment according to the present utility model, no
It is with part, in the present embodiment, mounting groove 2 is V-shaped, correspondingly, the installation form of permanent magnet 3 is also V-shaped.Using
3 mounting means of permanent magnet of V-shaped, the permanent magnet for being capable of providing bigger place space and improve anti-demagnetization capability.
The structure type of above-mentioned permanent magnet mounting means, the first air groove 4 and the second air groove 5 can as needed into
Row combination.
With reference to shown in Figure 5, embodiment according to the present utility model, magneto includes rotor assembly, the rotor set
Part is above-mentioned rotor assembly.
Preferably, magneto further includes stator 7, and stator 7 is set in outside rotor assembly, and the inner circumferential side of stator 7 has edge
The tooth 8 being circumferentially arranged of stator 7, rotor assembly is arranged in the circular void that tooth 8 surrounds, and can not be contacted with respect to tooth 8
Ground rotates.
Preferably, there is opening 9,5 face opening 9 of the second air groove of part is set between the adjacent teeth 8 of stator 7.
For those skilled in the art it is easily understood that on the premise of not conflicting, above-mentioned each advantageous manner can be free
Ground combination, superposition.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.The above is only the preferred embodiment of the utility model, it is noted that for the art
For those of ordinary skill, on the premise of the utility model technical principle is not departed from, several improvement and modification can also be made,
These improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (13)
1. a kind of rotor assembly, which is characterized in that including rotor core (1), circumferentially spaced setting on the rotor core (1)
There are multiple mounting grooves (2), be provided with permanent magnet (3) in the mounting groove (2), each permanent magnet (3) is towards rotor outer periphery edge
Polarity for same polarity, the adjacent mounting groove (2) is spaced apart by soft magnetic materials, the both ends of the mounting groove (2) and its
The first air groove (4) is respectively provided in circumferential direction between the adjacent soft magnetic materials, the mounting groove (2) is close to the rotor
The one side of iron core (1) outer peripheral edge is set there are two the second air groove (5), and second air groove (5) is arranged on the peace
The first end of tankage (2), another second air groove (5) are arranged on the second end of the mounting groove (2), and described in two
Air groove extends towards.
2. rotor assembly according to claim 1, which is characterized in that first air groove (4) is from the rotor core
(1) outer rim extends inwardly；Or, first air groove (4) is located on the inside of the outer peripheral edge of the rotor core (1).
3. rotor assembly according to claim 1, which is characterized in that second air groove (5) is from the rotor core
(1) outer rim extends inwardly, second air groove (5) connected with first air groove (4) and with the mounting groove (2)
It is spaced；Or, second air groove (5) is located on the inside of the rotor core (1) outer peripheral edge, and exist with the mounting groove (2)
End connects；Or, second air groove (5) is located on the inside of the rotor core (1) outer peripheral edge, and with the mounting groove (2)
It is separating.
4. rotor assembly according to claim 1, which is characterized in that the mounting groove (2) is yi word pattern or V-shaped.
5. rotor assembly according to any one of claim 1 to 4, which is characterized in that positioned at two adjacent peaces
Soft magnetic materials between tankage (2) is formed alternately pole (6), two first air at the same alternately circumferential both ends of pole (6)
The minimum angle that the line of centres of slot (4) and the rotor core (1) is formed is b, described in same mounting groove (2) is two corresponding
The minimum angle that the line of centres of second air groove (5) and the rotor core (1) is formed is a, 0.8≤b/a≤1.1.
6. rotor assembly according to any one of claim 1 to 4, which is characterized in that the magnetization side of the permanent magnet (3)
To thickness for t, the depth of first air groove (4) is d, the depth be from first air groove (4) near
The position at rotor shaft center to the rotor core (1) outer peripheral edge radial distance, wherein, 0.5t≤d≤2t.
7. rotor assembly according to any one of claim 1 to 4, which is characterized in that second air groove (5) has
Width w1 on radially, second air groove (5) is close to the edge of the mounting groove (2) one side and the rotor iron
The distance between outer peripheral edge of core (1) is w2, wherein 0.9≤w1/w2≤1.1.
8. rotor assembly according to claim 5, which is characterized in that the permanent magnet (3) in same mounting groove (2) leans on
Two outermost ends of nearly second air groove (5) one side form angle c with rotor center line, wherein 0.7≤a/c≤1.
9. rotor assembly according to any one of claim 1 to 4, which is characterized in that filled out in second air groove (5)
Filled with non-magnet material.
10. rotor assembly according to any one of claim 1 to 4, which is characterized in that in each mounting groove (2)
Permanent magnet (3) quantity is more than 1.
11. rotor assembly according to any one of claim 1 to 4, which is characterized in that contain in the permanent magnet (3)
Rare earth element.
12. a kind of magneto, including rotor assembly, which is characterized in that the rotor assembly is any in claim 1 to 11
Rotor assembly described in.
13. magneto according to claim 12, which is characterized in that the magneto further includes stator (7), described
Stator (7) is set in outside the rotor assembly, and the inner circumferential side of the stator (7) has being circumferentially arranged along the stator (7)
Tooth (8), the rotor assembly is arranged in the circular void that the tooth (8) surrounds, and can non-contiguously be revolved with respect to tooth (8)
Turn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720735494.7U CN207442555U (en) | 2017-06-21 | 2017-06-21 | Rotor assembly and magneto |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720735494.7U CN207442555U (en) | 2017-06-21 | 2017-06-21 | Rotor assembly and magneto |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207442555U true CN207442555U (en) | 2018-06-01 |
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ID=62395070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720735494.7U Active CN207442555U (en) | 2017-06-21 | 2017-06-21 | Rotor assembly and magneto |
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| Country | Link |
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| CN (1) | CN207442555U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196434A (en) * | 2017-06-21 | 2017-09-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor assembly and magneto |
-
2017
- 2017-06-21 CN CN201720735494.7U patent/CN207442555U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196434A (en) * | 2017-06-21 | 2017-09-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor assembly and magneto |
| CN107196434B (en) * | 2017-06-21 | 2024-03-12 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor assembly and permanent magnet motor |
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