CN206149052U - Rotor and permanent -magnet machine - Google Patents
Rotor and permanent -magnet machine Download PDFInfo
- Publication number
- CN206149052U CN206149052U CN201621171627.4U CN201621171627U CN206149052U CN 206149052 U CN206149052 U CN 206149052U CN 201621171627 U CN201621171627 U CN 201621171627U CN 206149052 U CN206149052 U CN 206149052U
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- permanent magnet
- rotor
- rotor core
- mounting groove
- thickness
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Abstract
The utility model provides a rotor and permanent -magnet machine, this rotor include rotor core and set up in permanent magnet in rotor core's the mounting groove, the permanent magnet has keeps away from the first end of rotor core center pin and being close to the second end of rotor core center pin, from first end to the second end, the thickness of permanent magnet on the magnetization direction is inconsistent. It is higher that there is air -gap flux density harmonic content in rotor that present permanent -magnet machine can be solved to above -mentioned scheme, the less problem of reluctance torque.
Description
Technical field
The utility model is related to technical field of motors, more particularly to a kind of rotor and the magneto with the rotor.
Background technology
Magneto is a kind of more conventional motor, and rotor is its important part.Existing rotor includes
Rotor core and the permanent magnet being arranged in rotor core, consistency of thickness of the permanent magnet in the direction of magnetization.
Through detection, above-mentioned magneto during use, the close harmonic content of rotor airgap magnetic of said structure compared with
Height, reluctance torque is less, and then causes utilization rate relatively low.
Utility model content
The purpose of this utility model is to provide a kind of rotor and magneto, to solve the air gap flux density that current rotor is present
Harmonic content is higher, the less problem of reluctance torque.
To achieve these goals, on the one hand, the utility model provides following technical scheme：
A kind of rotor, including rotor core and the permanent magnet that is arranged in the mounting groove of the rotor core, it is described forever
Magnet has the first end away from the rotor core central shaft and the second end near the rotor core central shaft, from institute
First end is stated to second end, variable thickness of the permanent magnet in the direction of magnetization is caused.
Preferably, from the first end to second end, the thickness in the direction of magnetization of the permanent magnet gradually increases
It is big or be gradually reduced.
Thickness of the first end of the permanent magnet in the direction of magnetization is t1, and the second end of the permanent magnet is in the direction of magnetization
On thickness be t2, relation is met between t1 and t2：0.9t2>t1>0.3t2.
Preferably, the minimum range between the mounting groove and the rotor core central shaft is d, the rotor core
The least radius of outer peripheral edge is r, and relation is met between d and r：r/3<d<3r/4.
Preferably, the cell wall of two sides of permanent magnet mounting groove respectively and corresponding thereto is adapted.
Preferably, first is formed between the cell wall of the end face of the permanent magnet first end and the mounting groove corresponding thereto
Air groove.
Preferably, the permanent magnet is arranged in pairs in the rotor core, is formed towards institute per permanent magnet described in a pair
State the V-structure of the radial outside opening of rotor core.
Preferably, it is correspondingly arranged in a V-shaped mounting groove per permanent magnet described in a pair.
Preferably, between the cell wall of the end face at the second end per permanent magnet described in a pair and the mounting groove corresponding thereto
Form the second air groove.
Preferably, the V-shaped mounting groove is in plane near the end of the rotor core axis.
Preferably, at most it is in linear contact lay between the second end per permanent magnet described in a pair.
Preferably, the cross section outline of the rotor core be positive round or by the multistage center of circle not in the circular arc of same position
It is spliced.
On the other hand, the utility model is adopted the following technical scheme that：
A kind of magneto includes, rotor as above.
Variable thickness of its permanent magnet of rotor that the utility model is provided from first end to the second end in the direction of magnetization is caused,
Air gap magnetic density waveform can be improved by the thickness changed in its direction of magnetization, so as to reduce harmonic content, the drop of air gap flux density
Low harmony wave is lost, and then improves using its electric efficiency.
The magneto that the utility model is provided adopts above-mentioned rotor, improves efficiency and operational reliability.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present application or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing that needs are used is briefly described, it should be apparent that, drawings in the following description are only described in the utility model
Some embodiments, for those of ordinary skill in the art, can be obtaining other accompanying drawings according to these accompanying drawings.
Fig. 1 is the structural representation of the rotor of the magneto that the utility model embodiment is provided.
In figure, 1, permanent magnet；11st, first end；12nd, the second end；2nd, rotor core；21st, mounting groove；3rd, the first air groove；
4th, the second air groove.
Specific embodiment
In order that those skilled in the art more fully understands the technical solution of the utility model, below in conjunction with accompanying drawing pair
The utility model is further detailed.
The air gap main field of magneto is produced by permanent magnet, and the magnetic produced by permanent magnet is close and it is in the direction of magnetization
The relation that thickness is proportionate, the thickness of permanent magnet is bigger, and air gap flux density is bigger, therefore, by changing permanent magnet in magnetization side
Thickness upwards can improve air gap magnetic density waveform, so as to reducing the harmonic content of air gap flux density, reducing harmonic loss, Jin Erti
Height adopts its electric efficiency.
Based on this, the utility model provides a kind of rotor, and it includes rotor core 2 and is arranged in rotor core 2
Permanent magnet 1, permanent magnet 1 has the first end 11 away from the central shaft of rotor core 2 and near rotor core 2 central shaft the
Two ends 12, from first end 11 to the second end 12, variable thickness of the permanent magnet 1 in the direction of magnetization is caused, i.e., permanent magnet 1 is in magnetization side
There is change in thickness upwards, to reach the purpose for improving air gap magnetic density waveform.
The concrete set-up mode that variable thickness of the permanent magnet 1 in the direction of magnetization is caused is not limited, can be according to specific applied field
Close and real needs are configured.For example, in one embodiment, from first end 11 to the second end 12, permanent magnet 1 is in magnetization
Thickness on direction gradually increases or is gradually reduced, in another embodiment, from first end 11 to the second end 12, permanent magnet
First gradually increase is gradually reduced again 1 thickness in the direction of magnetization, in a still further embodiment, from first end 11 to the second end
12, the thickness in the direction of magnetization of permanent magnet 1 is first gradually reduced and gradually increases again.
In a specific embodiment, the relatively broad speed governing permagnetic synchronous motor in application scenario requires the master of permanent magnet
The air gap magnetic density waveform that magnetic pole is produced is close to sine wave reducing the loss of harmonic band.Based on this, through checking,
Permanent magnet 1 is set to into trapezium structure as shown in Figure 1 and is gradually increased to the thickness of the second end 12 from first end 11, Neng Gougai
Kind air gap magnetic density waveform is close to sinusoidal waveform.
It is further preferred that the thickness by the first end 11 of permanent magnet 1 in the direction of magnetization is set to t1, permanent magnet 1
Thickness of second end 12 in the direction of magnetization is set to t2, and relation is met between t1 and t2：0.9t2>t1>0.3t2, enables to
Air gap magnetic density waveform is more nearly sinusoidal waveform, so as to further improve the performance using its magneto.
In addition, above-mentioned thickness relationship causes thickness ratio of the permanent magnet 1 near the second end 12 of the central shaft of rotor core 2 to lean on
The thickness of the first end 11 of the nearly radial outside of rotor core 2 is big, hence in so that permanent magnet near d axles one end thickness compared to leaning on
The thickness larger (d axles and q axles are as shown in fig. 1) of nearly q axles one end, the average thickness of permanent magnet 1 is greater than q axles on d axle magnetic circuits
The average thickness of permanent magnet 1 on magnetic circuit, because permanent magnet 1 has the magnetic resistance much larger than rotor core 2, therefore on d axle magnetic circuits
Magnetic resistance is bigger compared to the magnetic resistance using two ends uniform thickness permanent magnet 1, and d axles have less inductance, will now increase q axles and d
Axle inductance difference, so as to increase reluctance torque.
It can be seen that, rotor disclosed in the utility model can solve the air gap flux density harmonic content that current permanent magnet machine rotor is present
The less problem of higher, reluctance torque.
Further, mounting groove 21 is provided with rotor core 2, permanent magnet 1 is arranged in mounting groove 21.Preferably, pacify
Minimum range between tankage 21 and the central shaft of rotor core 2 is d, and for example as shown in fig. 1, mounting groove 21 is radially inner
The distance between end points and the central shaft of rotor core 2 are d, and the least radius of the outer peripheral edge of rotor core 2 is (after least radius
Face explains in detail) it is r, relation is met between d and r：r/3<d<3r/4, thus, sufficiently large permanent magnet 1 can either be provided pacifying
Between emptying, the intensity of the rotor punching for constituting rotor is ensure that again.
In a further embodiment, permanent magnet 1 is arranged in pairs in rotor core 2, it is preferable that every a pair of permanent magnets 1
The V-structure of the radial outside opening towards rotor core 2 is formed, wherein, the quantity of permanent magnet 1 is not limited, can be according to concrete need
Setting is asked, such as shown in fig. 1, including six pairs of along the circumferential direction uniform permanent magnets 1.It is further preferred that per a pair forever
Magnet 1 is both with respect to main pole d axial symmetry.
It is further preferred that multiple V-shaped mounting grooves 21 are provided with rotor core 2, such as shown in Figure 1 six
Individual, every a pair of permanent magnets 1 are correspondingly arranged in the mounting groove 21 of a V-arrangement, simplify structure, convenient processing.Preferably, install
Groove 21 is in symmetrical structure relative to main pole d axle.
Preferably, the first air is formed between the cell wall of the end face of permanent magnet first end 11 and mounting groove corresponding thereto 21
Groove 3, by the first air groove 3 realize between permanent magnet first end 11 and rotor core 2 every magnetic, reduce leakage field, it is similar, often
The second air groove 4 is formed between the cell wall of the end face at a pair of the second ends of permanent magnet 12 and mounting groove 21 corresponding thereto, by
Two air grooves 4 realize between the second end of permanent magnet 12 and rotor core 2 every magnetic, reduce leakage field.
Preferably, linear contact lay (i.e. the second of two permanent magnets 1 is at most formed between the second end 12 of every a pair of permanent magnets 1
The side close to each other of end end face contacts, it is also possible to do not contact) and non-face contact, so as to reduce the second end of permanent magnet 1
12 leakage field.It is further preferred that end face of the V-shaped mounting groove 21 near rotor core axis is in plane, i.e. by V-arrangement
The intersecting wedge angle position of 21 liang of bar grooves of mounting groove is substituted for plane, takes when so, it is possible to avoid being fitted into a permanent magnet 1
The wedge angle position of V-arrangement mounting groove 21 and cause a pair of two formation faces of permanent magnet 1 to contact.It is further preferred that two forever
Two sides that the end face at the end of magnet 1 second mutually deviates from abut against respectively with two sides of the plane, further avoid two forever
Magnet 1 forms face contact.
It is further preferred that two sides of permanent magnet 1 are mutually fitted respectively with the cell wall shape of mounting groove 21 corresponding thereto
Match somebody with somebody, for example, when permanent magnet 1 is in wedge shape as shown in Figure 1, the side wall also wedge shaped setting of mounting groove 21 so that when motor fortune
During row, from the first end 11 of permanent magnet 1 to the direction at the second end 12, two sides of permanent magnet 1 peace respectively and corresponding thereto
Gap between the cell wall of tankage 21 is consistent, keeps the gap uniformity between the side of permanent magnet 1 and the cell wall of mounting groove 21, can
Ensure that permanent magnet 1 of the rotor when running up in mounting groove 21 will not be transported because of centrifugal force to the outer peripheral edge of rotor core 2
It is dynamic, so as to improve the installation reliability of permanent magnet 1.
It is further preferred that the angle between every a pair of permanent magnets 1 is a, as shown in figure 1, angle a herein be two forever
Angle between two relative sides of magnet 1, in a preferred embodiment, rotor includes six pairs of permanent magnets 1, per a pair
Angle a between permanent magnet 1 meets 130 °>а>90 °, empirical tests, the angular range is obtained in that more excellent air gap magnetic density waveform.
In the present embodiment, permanent magnet 1 can be made using Ru-Fe-Mn material, can be made using ferrite, can with by
Other permanent-magnet materials are made, and the application is not restricted to this.
The cross section outline of rotor core 2 can be positive round, it is also possible to be not in the circle of same position by the multistage center of circle
Arc is spliced, and the shape that outline is set to be not spliced in the circular arc of same position by the multistage center of circle can be further
For the structural strength that permanent magnet 1 provides sufficiently large installing space and the rotor punching for ensureing to form rotor.When rotor core 2
When cross section outline is in positive round, the least radius r of the outer peripheral edge of aforesaid rotor core 2 is the radius of positive round；And work as and turn
The cross section outline of sub- iron core 2 by the multistage center of circle not when the circular arc of same position is spliced, aforesaid rotor core 2
The least radius r of outer peripheral edge is the radius of the inscribed circle of outer contour.
The utility model embodiment also provides a kind of magneto, and the magneto includes turning described in foregoing embodiments
Son, to improve efficiency and operational reliability.
The above only describes some one exemplary embodiments of the present utility model by way of explanation, undoubtedly, for
One of ordinary skill in the art, in the case of without departing from spirit and scope of the present utility model, can be with a variety of
Mode is modified to described embodiment.Therefore, above-mentioned accompanying drawing and description are inherently illustrative, should not be construed as
Restriction to the utility model claims.
Claims (13)
1. a kind of rotor, including rotor core and the permanent magnet being arranged in the mounting groove of the rotor core, its feature exists
In, the permanent magnet there is the first end away from the rotor core central shaft and near the rotor core central shaft the
Two ends, from the first end to second end, variable thickness of the permanent magnet in the direction of magnetization is caused.
2. rotor according to claim 1, it is characterised in that from the first end to second end, the permanent magnet
Thickness in the direction of magnetization gradually increases or is gradually reduced.
3. rotor according to claim 1, it is characterised in that thickness of the first end of the permanent magnet in the direction of magnetization
For t1, the thickness of the second end of the permanent magnet in the direction of magnetization is t2, and relation is met between t1 and t2：0.9t2>t1>
0.3t2。
4. rotor according to claim 1, it is characterised in that between the mounting groove and the rotor core central shaft
Minimum range is d, and the least radius of the outer peripheral edge of the rotor core is r, and relation is met between d and r：r/3<d<3r/4.
5. rotor according to claim 1, it is characterised in that two sides of the permanent magnet are respectively and corresponding thereto
The cell wall of the mounting groove is adapted.
6. rotor according to claim 1, it is characterised in that the end face of the permanent magnet first end and institute corresponding thereto
The first air groove is formed between the cell wall for stating mounting groove.
7. the rotor according to any one of claim 1 to 6, it is characterised in that the permanent magnet is arranged in pairs at described turning
In sub- iron core, per permanent magnet described in a pair V-structure of the radial outside opening towards the rotor core is formed.
8. rotor according to claim 7, it is characterised in that be correspondingly arranged at per permanent magnet described in a pair one it is V-shaped
Mounting groove in.
9. rotor according to claim 8, it is characterised in that the end face at the second end per permanent magnet described in a pair and and its
The second air groove is formed between the cell wall of the relative mounting groove.
10. rotor according to claim 8, it is characterised in that the V-shaped mounting groove is in the rotor core
The end of axis is in plane.
11. rotors according to claim 7, it is characterised in that be at most between the second end per permanent magnet described in a pair
Linear contact lay.
12. rotors according to any one of claim 1 to 6, it is characterised in that the cross section outline of the rotor core
It is not spliced in the circular arc of same position for positive round or by the multistage center of circle.
13. a kind of magnetoes, it is characterised in that include the rotor as described in any one of claim 1 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621171627.4U CN206149052U (en) | 2016-10-26 | 2016-10-26 | Rotor and permanent -magnet machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621171627.4U CN206149052U (en) | 2016-10-26 | 2016-10-26 | Rotor and permanent -magnet machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206149052U true CN206149052U (en) | 2017-05-03 |
Family
ID=58622882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621171627.4U Active CN206149052U (en) | 2016-10-26 | 2016-10-26 | Rotor and permanent -magnet machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206149052U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451852A (en) * | 2016-10-26 | 2017-02-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor and permanent magnet motor |
| CN112117846A (en) * | 2019-06-19 | 2020-12-22 | 上海海立电器有限公司 | Special-shaped permanent magnet structure of motor rotor and compressor |
-
2016
- 2016-10-26 CN CN201621171627.4U patent/CN206149052U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451852A (en) * | 2016-10-26 | 2017-02-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor and permanent magnet motor |
| CN112117846A (en) * | 2019-06-19 | 2020-12-22 | 上海海立电器有限公司 | Special-shaped permanent magnet structure of motor rotor and compressor |
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