CN204376558U - Rotor core and there is its motor - Google Patents
Rotor core and there is its motor Download PDFInfo
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- CN204376558U CN204376558U CN201520108234.8U CN201520108234U CN204376558U CN 204376558 U CN204376558 U CN 204376558U CN 201520108234 U CN201520108234 U CN 201520108234U CN 204376558 U CN204376558 U CN 204376558U
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- rotor core
- magnet steel
- rotor
- straight wall
- side wall
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Abstract
The utility model provides a kind of rotor core and has its motor.Rotor core, comprise: multiple rotor punching laminated, each rotor punching comprises axis hole and the uniform and magnet steel groove radially extended of multiple circumference along rotor punching, and each magnet steel groove has: outer Zhi Bi, and the radial direction perpendicular to rotor punching is arranged; The straight wall in interior edge, is parallel to outer straight wall and arranges and between the straight wall in outer and axis hole; The first side wall, between the one end of the straight wall in one end and interior edge being connected to the straight wall in outer; Second sidewall, and the first side wall is oppositely arranged and is connected between the other end of the straight wall of the other end and interior edge of the straight wall in outer; Wherein, in the first side wall and the second sidewall, at least one is obliquely installed relative to outer Zhi Bi.Rotor core of the present utility model can reduce motor oscillating and noise.
Description
Technical field
The utility model relates to electric equipment field, in particular to a kind of rotor core and the motor with it.
Background technology
In the prior art, a kind of motor tangential magnetic steel rotor structure of permanent magnet motor is related to.This punching adopts notch dissymmetrical structure stacked by forward and reverse axis, reaches oblique pole effect.But asymmetric open slot plays the effect of oblique pole, but interior large every magnetic leakage magnetic, and motor performance declines to some extent.
In another kind of prior art, relate to a kind of tangential rotors punching and there is its rotor core, motor.In this rotor punching (outward) every magnetic bridge respectively with adjacent in (outward) circumferentially alternately disconnect every magnetic bridge, it is stacked that its iron core adopts such rotor punching to carry out playback formula, outer disconnection every magnetic bridge is alternately placed with the punching do not disconnected, thus reduces leakage field.There is protruding (preventing magnet steel from moving) point every magnetic bridge in rotor, this point and magnet steel interelectrode portion form closed-loop path, cause leakage field to increase, and the minimizing of ring size in another rotor, causes rotor punching weaken.Playback formula is intersected stacked, and technology difficulty is large, is not easy to one-shot forming.
Another prior art relates to a kind of rotor core and has its motor.This iron core, by outer alternately axial stacked every magnetic bridge the first punching disconnected and the second punching be connected every magnetic bridge outward, add iron core intensity, reduces outside leakage field.But form closed-loop path between rotor pole and between consecutive roots, leakage field is more, the easy fin distortion of the punching disconnected completely every magnetic outward, alternately laminating of the first punching and the second punching, complex process, difficulty is large.
Also prior art relates to an a kind of tangential permanent magnetic synchro motor rotor, this rotor adopts magnetic shield to cut off completely every magnetic bridge in magnetic shield and magnet steel every magnetic, holds effect tightly while reducing leakage field to steel axle.Although but adopt effective every magnetic every magnetic of magnetic shield, cost is high, complex process, and in addition, whole rotor relies on and to connect every magnetic bridge outward, and rotor strength is low.
In sum, in prior art, there are the following problems: rotor straight groove structure vibration noise is large, and flume structure is difficult to carry out problem; Tangential rotor structure leakage field is serious, and magnet steel utilance is low, hydraulic performance decline and cost increases; Tangential motor rotor construction demagnetization capability is poor, and overload capacity declines; Adopt the magnetic-leakage preventing collar or reduce the modes such as the interior thickness every magnetic bridge, cause the problems such as complex process, rotor strength are low; After magnet steel magnetizes, in assembling process, easily anti-loaded for N, S polarity.
Utility model content
Main purpose of the present utility model is that providing a kind of can reduce the rotor core of motor oscillating and noise and have its motor.
To achieve these goals, according to an aspect of the present utility model, provide a kind of rotor core, comprise: multiple rotor punching laminated, each rotor punching comprises axis hole and the uniform and magnet steel groove radially extended of multiple circumference along rotor punching, each magnet steel groove has: outer Zhi Bi, and the radial direction perpendicular to rotor punching is arranged; The straight wall in interior edge, is parallel to outer straight wall and arranges and between the straight wall in outer and axis hole; The first side wall, between the one end of the straight wall in one end and interior edge being connected to the straight wall in outer; Second sidewall, and the first side wall is oppositely arranged and is connected between the other end of the straight wall of the other end and interior edge of the straight wall in outer; Wherein, in the first side wall and the second sidewall, at least one is obliquely installed relative to outer Zhi Bi.
Further, the first side wall is the straight wall be obliquely installed relative to outer Zhi Bi, and the radial direction that the second sidewall is parallel to rotor punching is arranged to make magnet steel groove be wedge shape.
Further, the first side wall is the straight wall be obliquely installed relative to outer Zhi Bi, and the second sidewall is the straight wall be obliquely installed relative to outer Zhi Bi.
Further, the distance between the first side wall and the second sidewall increases gradually towards the direction away from axis hole.
Further, the first side wall is the arcwall be obliquely installed relative to outer Zhi Bi.
Further, the second sidewall is the straight wall that arcwall or the radial direction being parallel to rotor punching are arranged.
Further, the angle between the first side wall and the second sidewall is θ, and wherein, 0 ° of < θ < 360/8P, P is number of pole-pairs.
Further, every two magnet steel grooves form one group of magnet steel groove group, and the bottom of two magnet steel grooves in magnet steel groove group is interconnected and jointly forms closed slot.
According to another aspect of the present utility model, additionally provide motor, comprise at least two groups and in axial direction arrange and interconnective rotor core, rotor core is above-mentioned rotor core.
Further, every two adjacent groups rotor core comprises interconnective one group of forward and laminates the rotor core that the rotor core of placement and a group oppositely laminate placement, is provided with permanent magnet in magnet steel groove.
Apply rotor core of the present utility model, wherein, the straight wall in outer is arranged perpendicular to the radial direction of rotor punching, at least one of the first side wall or the second sidewall is obliquely installed relative to this outer Zhi Bi, reach oblique pole effect, reduce cogging torque, reduce motor oscillating and noise.Rotor core of the present utility model can reduce motor oscillating and noise.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 show according to rotor punching of the present utility model is positive and negative laminate after the front view of rotor core;
Fig. 2 show according to rotor punching of the present utility model is positive and negative laminate after the stereogram of rotor core;
Fig. 3 shows the forward displacement structure schematic diagram according to rotor punching of the present utility model;
Fig. 4 shows the reverse displacement structure schematic diagram according to rotor punching of the present utility model.
Wherein, above-mentioned accompanying drawing comprises the following drawings mark:
10, axis hole;
20, magnet steel groove;
21, outer Zhi Bi; 22, the straight wall in interior edge; 23, the first side wall; 24, the second sidewall;
30, permanent magnet;
40, interelectrode portion;
50, annular region;
60, interior every magnetic bridge;
70, outer every magnetic bridge.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
As depicted in figs. 1 and 2, according to an aspect of the present utility model, a kind of rotor core is provided.
Particularly, rotor core comprises the multiple rotor punching, the straight wall in outer 21, the straight wall 22 in interior edge, the first side wall 23 and the second sidewall 24 that laminate.
As shown in Figure 3 and Figure 4, each rotor punching comprises axis hole 10 and multiple magnet steel groove 20.Multiple magnet steel groove 20 is uniform along the circumference of rotor punching, and each magnet steel groove 20 radially extends.
Wherein, each magnet steel groove 20 has the straight wall in outer 21, the straight wall 22 in interior edge, the first side wall 23 and the second sidewall 24.The straight wall 21 in outer is arranged perpendicular to the radial direction of rotor punching, and the straight wall in interior edge 22 is parallel to the straight wall in outer 21 and arranges and between the straight wall 21 in outer and axis hole 10, and the straight wall in outer 21 and the straight wall 22 in interior edge are parallel to each other.The first side wall 23 is connected between one end of the straight wall 22 in one end and interior edge of the straight wall in outer 21, and the second sidewall 24 is oppositely arranged with the first side wall 23, and the second sidewall 24 is connected between the other end of the straight wall 22 of the other end and interior edge of the straight wall in outer 21.Wherein, in the first side wall 23 and the second sidewall 24 at least one and the not parallel setting of the straight wall in outer 21 also out of plumb arrange, namely in the first side wall 23 and the second sidewall 24, at least one is obliquely installed relative to the straight wall 21 in outer, and that is in the first side wall 23 and the second sidewall 24, the bearing of trend of at least one and the radial direction of rotor punching have angle.Wherein, the first side wall 23, second sidewall 24, the straight wall 22 of the straight wall in outer 21 and interior edge surround magnet steel groove 20, and the both ends open of magnet steel groove 20 lays respectively on two end faces of rotor punching, this opening and end face.
Because the radial direction of the straight wall 21 in outer perpendicular to rotor punching is arranged, at least one of the first side wall 23 or the second sidewall 24 is obliquely installed relative to the straight wall 21 in this outer, reaches oblique pole effect, reduces cogging torque, reduces motor oscillating and noise.
As Fig. 1 to 4 is known, the first side wall 23 is the straight wall be obliquely installed relative to the straight wall in outer 21, and the radial direction that the second sidewall 24 is parallel to rotor punching arranges to make magnet steel groove 20 in wedge shape.Such design, makes dress magnet steel area increase, improves the power density of motor, decrease the volume of motor.Again due to the structure of wedge-type shape, magnet steel can firmly be stuck in magnet steel groove 20, without the need to fixation such as buckle or iron core projections, thus reduces leakage field, improves magnet steel utilance.Due to without buckle structure, magnet steel interelectrode portion 40 can be made significantly thicker with the coupling part in rotor annular region 50, adds the intensity of rotor punching.Wedge shape makes the thickness direction of magnet steel to increase further, and demagnetization capability is improved greatly.And due to the asymmetry of magnet steel groove, after magnet steel magnetizes, in assembling process, be not easy, anti-loaded for N, S polarity, mistake proofing effect can be played.
In another kind of embodiment of the present utility model, the first side wall 23 is the straight wall be obliquely installed relative to the straight wall in outer 21, and the second sidewall 24 is the straight wall be obliquely installed relative to the straight wall in outer 21.Further increase the area of dress magnet steel, improve the power density of motor, decrease the volume of motor.With the reason of above-described embodiment, magnet steel can firmly be stuck in magnet steel groove 20, without the need to fixation such as buckle or iron core projections, thus reduces leakage field, improves magnet steel utilance.Due to without buckle structure, magnet steel interelectrode portion 40 can be made significantly thicker with the coupling part in rotor annular region 50, adds the intensity of rotor punching.
As shown in Figures 1 to 4, the distance between the first side wall 23 and the second sidewall 24 increases gradually towards the direction away from axis hole 10, can reach better oblique pole effect.Add the area of dress magnet steel simultaneously, improve the power density of motor, decrease the volume of motor.
Not shown the present embodiment, preferably, the first side wall 23 is the arcwall be obliquely installed relative to the straight wall 21 in outer.The area of more dress magnet steel can be increased, improve the power density of motor, decrease the volume of motor.Equally also magnet steel firmly can be stuck in magnet steel groove 20, without the need to fixation such as buckle or iron core projections, thus reduce leakage field, improve magnet steel utilance.Due to without buckle structure, magnet steel interelectrode portion 40 can be made significantly thicker with the coupling part in rotor annular region 50, adds the intensity of rotor punching.
In other embodiments, the first side wall 23 is arcwall, and the second sidewall 24 is arcwall.Or the first side wall 23 is arcwall, the straight wall that the second sidewall 24 is arranged for the radial direction being parallel to rotor punching.Second sidewall 24 is straight wall, and structure is simple and stable.When the first side wall 23 is arcwall, the second sidewall 24 is also arcwall, and the area of visible dress magnet steel expands further, improves the power density of motor, decreases the volume of motor.
Preferably, the angle between the first side wall 23 and the second sidewall 24 is θ, and wherein, 0 ° of < θ < 360/8P, P is number of pole-pairs.Oblique pole better effects if, reduces cogging torque, reduces motor oscillating and noise.
As shown in Figure 2, every two magnet steel grooves 20 form one group of magnet steel groove group, and the bottom of two magnet steel grooves 20 in magnet steel groove group is interconnected and jointly forms closed slot, and the bottom of connection is full of air to be formed in magnet steel groove every magnetic bridge.Can ensure to reduce leakage field, improve magnet steel utilance.Again because internal magnetic circuit cuts off on one side completely, almost magnetic leakage free, so the other end of rotor punching can design thicker, thus improves the structural strength of rotor.Wherein, be formed outer every magnetic bridge 70 between the straight wall 21 in the periphery of rotor core and outer, every magnetic bridge 60 in being formed between adjacent two magnet steel groove groups.
According to another aspect of the present utility model, additionally provide motor, as depicted in figs. 1 and 2, this motor comprises at least two groups and in axial direction arranges and interconnective rotor core, and rotor core is above-mentioned rotor core.
The utility model provides a kind of preferred embodiment, and every two adjacent groups rotor core comprises interconnective one group of forward and laminates the rotor core that the rotor core of placement and a group oppositely laminate placement, is provided with permanent magnet 30 in magnet steel groove 20.Rotor strength can be made to improve in the positive and negative placement of axial direction.In the above-described embodiments, magnet steel groove 20 has symmetrically arranged, also has asymmetric setting.Preferably, the magnet steel that rotor punching adopts asymmetric magnet steel groove 20 and is arranged in this asymmetric magnet steel groove 20, axial direction carries out positive and negative placement, positive and negative stacked rotor structure serves the effect of flume structure, reach oblique pole effect and technique is simple, and, while minimizing leakage field, ensure that the structural strength of rotor.Again due to the wedge structure of magnet steel, the demagnetization capability of expanded motor to a certain extent, another slot wedge asymmetric, also rotor punching is made just can effectively to prevent magnet steel from throwing away because of the effect of centrifugal force without the need to designing buckle, thus improve leakage field, improve magnet steel utilance, reduce motor cost.
As can be seen from the above description, the utility model the above embodiments achieve following technique effect:
1, adopt the program, the rotor punching segmentation with asymmetric wedge structure is stacked, plays oblique pole effect, reduces cogging torque, reduces motor oscillating and noise;
2, due to wedge-type shape structure, magnet steel can firmly be stuck in magnet steel groove, without the need to fixation such as buckle or iron core projections, thus minimizing leakage field, improve magnet steel utilance, due to without buckle structure, magnet steel interelectrode portion and rotor annular joint area part can be made significantly thicker, and the positive and negative placement of axial direction also makes rotor strength improve;
3, magnet steel groove wedge structure improve magnet steel can erection space, thus improve power density, reduce motor volume;
4, the increase of the thickness direction of magnet steel, also makes demagnetization capability greatly improve;
5, compare other segmented magnetic steel structures, the program magnetizes simple with assembly technology, is easy to batch production and the asymmetry of its magnet steel, and band abampere dress also can play mistake proofing effect.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (10)
1. a rotor core, it is characterized in that, comprise: multiple rotor punching laminated, each described rotor punching comprises axis hole (10) and the uniform and magnet steel groove (20) radially extended of multiple circumference along described rotor punching, and each described magnet steel groove (20) has:
Outer Zhi Bi (21), the radial direction perpendicular to described rotor punching is arranged;
The straight wall in interior edge (22), is parallel to described outer Zhi Bi (21) and arranges and be positioned between described outer Zhi Bi (21) and described axis hole (10);
The first side wall (23), between the one end being connected to described outer Zhi Bi (21) and the one end on the straight wall in described interior edge (22);
Second sidewall (24), and described the first side wall (23) is oppositely arranged and between the other end being connected to described outer Zhi Bi (21) and the other end on the straight wall in described interior edge (22);
Wherein, in described the first side wall (23) and described second sidewall (24), at least one is obliquely installed relative to described outer Zhi Bi (21).
2. rotor core according to claim 1, it is characterized in that, described the first side wall (23) is the straight wall be obliquely installed relative to described outer Zhi Bi (21), and the radial direction that described second sidewall (24) is parallel to described rotor punching is arranged to make described magnet steel groove (20) in wedge shape.
3. rotor core according to claim 1, it is characterized in that, described the first side wall (23) is the straight wall be obliquely installed relative to described outer Zhi Bi (21), and described second sidewall (24) is the straight wall be obliquely installed relative to described outer Zhi Bi (21).
4. the rotor core according to Claims 2 or 3, is characterized in that, the distance between described the first side wall (23) and described second sidewall (24) increases gradually towards the direction away from described axis hole (10).
5. rotor core according to claim 1, is characterized in that, described the first side wall (23) is the arcwall be obliquely installed relative to described outer Zhi Bi (21).
6. rotor core according to claim 5, is characterized in that, described second sidewall (24) for arcwall or be parallel to described rotor punching radial direction arrange straight wall.
7. rotor core according to claim 2, it is characterized in that, the angle between described the first side wall (23) and described second sidewall (24) is θ, wherein, 0 ° of < θ < 360/8P, P is number of pole-pairs.
8. rotor core according to claim 1, it is characterized in that, every two described magnet steel grooves (20) form one group of magnet steel groove group, and the bottom of two in described magnet steel groove group described magnet steel grooves (20) is interconnected and jointly forms closed slot.
9. a motor, is characterized in that, comprises at least two groups and in axial direction arranges and interconnective rotor core, the rotor core of described rotor core according to any one of claim 1 to 8.
10. motor according to claim 9, it is characterized in that, every two adjacent groups rotor core comprises interconnective one group of forward and laminates the rotor core that the rotor core of placement and a group oppositely laminate placement, is provided with permanent magnet (30) in described magnet steel groove (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520108234.8U CN204376558U (en) | 2015-02-12 | 2015-02-12 | Rotor core and there is its motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520108234.8U CN204376558U (en) | 2015-02-12 | 2015-02-12 | Rotor core and there is its motor |
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| CN204376558U true CN204376558U (en) | 2015-06-03 |
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| CN201520108234.8U Active CN204376558U (en) | 2015-02-12 | 2015-02-12 | Rotor core and there is its motor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105990920A (en) * | 2015-02-12 | 2016-10-05 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor iron core and motor having the same |
| CN106253522A (en) * | 2016-08-26 | 2016-12-21 | 上海富田电气技术有限公司 | A kind of tangential magnet-steel structure axial magnetic field high torque density permanent magnet disc motor |
| WO2017049954A1 (en) * | 2015-09-24 | 2017-03-30 | 珠海格力电器股份有限公司 | Electric motor and tangential type permanent magnet rotor thereof |
| WO2019085499A1 (en) * | 2017-11-01 | 2019-05-09 | 莱克电气股份有限公司 | Rotor core |
| WO2021036460A1 (en) * | 2019-08-30 | 2021-03-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet synchronous motor rotor and compressor having same |
-
2015
- 2015-02-12 CN CN201520108234.8U patent/CN204376558U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105990920A (en) * | 2015-02-12 | 2016-10-05 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor iron core and motor having the same |
| WO2017049954A1 (en) * | 2015-09-24 | 2017-03-30 | 珠海格力电器股份有限公司 | Electric motor and tangential type permanent magnet rotor thereof |
| US10630124B2 (en) | 2015-09-24 | 2020-04-21 | Gree Electric Appliances, Inc. Of Zhuhai | Electric motor and tangential type permanent magnet rotor thereof |
| EP3355441B1 (en) * | 2015-09-24 | 2022-04-13 | Gree Electric Appliances, Inc. of Zhuhai | Electric motor and tangential type permanent magnet rotor thereof |
| CN106253522A (en) * | 2016-08-26 | 2016-12-21 | 上海富田电气技术有限公司 | A kind of tangential magnet-steel structure axial magnetic field high torque density permanent magnet disc motor |
| WO2019085499A1 (en) * | 2017-11-01 | 2019-05-09 | 莱克电气股份有限公司 | Rotor core |
| WO2021036460A1 (en) * | 2019-08-30 | 2021-03-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet synchronous motor rotor and compressor having same |
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