CN208241423U - Rotor core and rotor - Google Patents
Rotor core and rotor Download PDFInfo
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- CN208241423U CN208241423U CN201820544259.6U CN201820544259U CN208241423U CN 208241423 U CN208241423 U CN 208241423U CN 201820544259 U CN201820544259 U CN 201820544259U CN 208241423 U CN208241423 U CN 208241423U
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Abstract
The utility model relates to a kind of rotor core and rotors, the rotor core includes: core body, it is opened in the shaft hole at the core body center, and the magnetic slot of the circumferencial direction uniform intervals arrangement along the core body, the quantity of the magnetic slot are even number；The shape of the magnetic slot is irregular fan annular, two arcs and the shaft hole of the irregular fan annular are concentric, the intersection point of the extended line of two straight flanges of the irregular fan annular is located in the core body, and the intersection point is not overlapped with the axle center of the shaft hole.Since the intersection point of the extended line of two straight flanges of rotor core of the utility model is not overlapped with the axle center of the shaft hole, constitute eccentric structure, deviate magnetic slot along the circumferential direction at an angle, this design can significantly weaken cogging torque, velocity perturbation, vibration and the noise when low speed operation are reduced, keeps motor operation more steady.
Description
Technical field
The utility model relates to technical field of motors, more particularly to rotor core and rotor.
Background technique
With the rise of new energy, electric car high speed development under the vigorously supporting of national and local governments, and drive
Motor is always the crucial priority and difficulty of electric car, and the requirement to torque, efficiency, size, weight etc. is all very harsh.Existing city
The usual cogging torque of the wheel motor of mainstream is excessive on field, to cause motor operation unstable.
Utility model content
Based on this, it is necessary to it is excessive for the usual cogging torque of wheel motor of existing mainstream in the market, to cause motor
Unstable problem is run, a kind of rotor core and rotor for motor is provided.
A kind of rotor core, comprising: core body is opened in the shaft hole at the core body center, and along described
The magnetic slot of the circumferencial direction uniform intervals arrangement of core body, the quantity of the magnetic slot are even number；The magnetic slot
Shape is irregular fan annular, and two arcs and the shaft hole of the irregular fan annular are concentric, described irregular
The intersection point for fanning the extended line of two straight flanges of annular is located in the core body, and the axle center of the intersection point and the shaft hole
It is not overlapped.
Since the intersection point of extended line of two straight flanges of rotor core of the technical program is not weighed with the axle center of the shaft hole
It closes, that is, constitutes eccentric structure, deviate magnetic slot along the circumferential direction at an angle, this design can significantly weaken tooth socket and turn
Square reduces velocity perturbation, vibration and noise when low speed operation, keeps motor operation more steady.
Further, the side wall that the shaft hole is used to form in the core body is equipped with keyway.
Further, it is described it is irregular fan annular two straight flanges extended line be formed by angular range be 30 °-
50°。
Further, the circumferencial direction uniform intervals setting along the core body is also provided in the core body
First aeration structure, first aeration structure are set between the two neighboring magnetic slot, and first aeration structure
Quantity is identical as the quantity of the magnetic slot.
Further, first aeration structure includes two the first ventilation holes, the shape of two first ventilation holes
For fan annular.
Further, circle uniform intervals setting is offered along the circumferencial direction of the shaft hole in the core body
The second aeration structure；Second aeration structure is set between the magnetic slot and the shaft hole.
The technical program also provides a kind of rotor, and the rotor includes rotor core described in any embodiment as above, wears
Shaft in the rotor core shaft hole, the permanent magnet in the magnetic slot, and it is respectively arranged on the rotor
The first tabletting and the second tabletting of iron core two relative side.
Further, through slot, the position of the through slot and quantity are equipped in first tabletting and second tabletting
Respectively with the position of the magnetic slot and quantity Matching.
Further, the shape of the through slot is consistent with the shape of the magnetic slot, and the size of the through slot is less than institute
State the size of magnetic slot.
Further, the range of the area ratio of the area of the magnetic slot and the through slot is 1.2-1.5.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of rotor core described in the embodiments of the present invention；
Fig. 2 is the sectional view of rotor described in the embodiments of the present invention.
20, rotor；21, core body；211, shaft hole；212, magnetic slot；213, keyway；214, the first aeration structure；
215, the second aeration structure；216, pin hole；22, shaft；221, parallel key；231, the first pressing plate；232, the second pressing plate；24,
Jam nut；251, the first tabletting；252, the second tabletting；26, pin.
Specific embodiment
It is below in conjunction with attached drawing and specifically real for the purpose of this utility model, technical solution and advantage is more clearly understood
Mode is applied, the utility model is described in further detail.It should be understood that the specific embodiments described herein
Only to explain the utility model, the protection scope of the utility model is not limited.
A kind of rotor core as shown in Figure 1, comprising: core body 21 is opened in turning for 21 center of core body
Axis hole 211, and the magnetic slot 212 of the circumferencial direction uniform intervals arrangement along the core body 21, it is uniform in order to be formed
Magnetic field, the quantity of the magnetic slot 212 are even number, are formed to pole structure；Present embodiment is provided with eight magnetic slots 212,
Four pairs of pole structures are formed, can also be able to be two according to different use occasions using number of pole-pairs not pair in other embodiments
To pole, three pairs extremely etc..The shape of the magnetic slot 212 is irregular fan annular, two arcs of the irregular fan annular
Concentric with the shaft hole, the intersection point A of the extended line of two straight flanges of the irregular fan annular is located at the core body
On 21, and the intersection point A is not overlapped with the axle center B of the shaft hole 211.
Due to the intersection point A of the extended line of 21 two straight flanges of core body of present embodiment and the axis of the shaft hole 211
Heart B is not overlapped, that is, constitutes eccentric structure, deviates magnetic slot 212 along the circumferential direction at an angle, this design can be significant
Weaken cogging torque, reduces velocity perturbation, vibration and noise when low speed operation, keep motor operation more steady.Also, this reality
The core body 21 for applying mode is made of non-magnetic High molecular weight polyethylene material, and the material weight is light, intensity is big, can have
Effect reduces the total weight of motor, further reduces motor overall volume, improves power of motor density, plays motor bigger
Torque and power, motor performance are significantly improved.
Further, the side wall that the shaft hole 211 is used to form in the core body 21 is equipped with keyway 213, i.e.,
The rotor core and shaft are key connection.
Further, the extended line of two straight flanges of irregular fan annular described in present embodiment is formed by angle
Range α is 30 ° -50 °, facilitates processing and weakening cogging torque ability is preferable.
Further, the circumferencial direction uniform intervals being also provided in the core body 21 along the core body 21 are set
The first aeration structure 214 set, first aeration structure 214 are set between the two neighboring magnetic slot 212, and described the
The quantity of one aeration structure 214 is identical as the quantity of the magnetic slot 214.In addition, along the shaft in the core body 21
The circumferencial direction in hole 21 offers the second aeration structure 215 of circle uniform intervals setting；Second aeration structure 215 is set
Between the magnetic slot 212 and the shaft hole 211.First aeration structure 214 and the second ventilation described in present embodiment are tied
Structure 215 is ventilation hole, and first aeration structure 214 includes two fan annular vents, and fan annular vent is sufficiently sharp
With space remaining in core body 21.Two groups of aeration structures make full use of the space of core body 21, make rotor core
Weight reduces, and reduces the rotary inertia of rotor 20, ensure that the intensity of rotor 20, while also improving the heat dissipation performance of motor.
Present embodiment also provides a kind of rotor 20, and the rotor 20 includes rotor iron described in any embodiment as above
Core, the shaft 22 being arranged in the rotor core shaft hole 211, the permanent magnet in the magnetic slot 212, and respectively
Set on the first tabletting 251 and the second tabletting 252 of 21 two relative side of core body.First tabletting 251 and second
The cooperation intensity of permanent magnet and magnetic slot 212 is reinforced in tabletting 252, and permanent magnet is made to be not easy to drop out when rotor 20 rotates.
Specifically, the thickness of first tabletting 251 and second tabletting 252 is 0.5mm, and the first tabletting 251
Be equipped with through slot in the second tabletting 252, the position of the through slot and quantity respectively with the position of the magnetic slot 212 and quantity
Matching, and the shape of the through slot is consistent with the shape of the magnetic slot 212, and the size of the through slot is less than the magnet steel
The size of slot 212, i.e., the described through slot are size after 212 scaled down of magnetic slot.
Preferably, the range of the area ratio of the area and through slot of the magnetic slot 212 is 1.2-1.5.This implementation
The area ratio of the area of magnetic slot 212 described in mode and the through slot is 1.2, i.e., the size of the through slot of present embodiment is in magnetic
Scaled down 1/6 on the basis of the size of steel tank 212；Since the size of the through slot is less than the ruler of the magnetic slot 212
It is very little, so that the edge of through slot protrusion is contacted with permanent magnet, and permanent magnet and the through slot are protruded by the way of laser welding
Marginal portion welding, to block permanent magnet, fall it from magnetic slot 212.In order to reduce motor volume, it is described forever
Magnet is the NdFeB material of the sintering of the high trade mark, and permanent magnet is placed in magnetic slot 212, is built-in, 251 He of the first tabletting
21 two relative side of core body is pushed down in second tabletting 252, fixes permanent magnetism by laser welding or other effective welding manners
Body, processing technology is simple, facilitates batch production.Surface-mount type structure, this knot are mostly used greatly compared to traditional permanent magnet machine rotor
The permanent magnet of structure is pasted onto rotor forehead, and when motor runs at high speed, especially electronic automobile-used permanent magnetism wheel motor high speed is transported
When turning, due to the presence of high speed centrifugation power, surface-mount type structure, which is unable to satisfy, to run at high speed, and limits the maximum speed of motor, drop
The low performance of motor, and the built-in structure of present embodiment is placed in permanent magnet inside core body 21, and fixed permanent magnetism
The first tabletting 251 and the second tabletting 252 of body only have 0.5mm thick, further save the axial space of motor, reduce motor body
Product, facilitates the shaft orientation layout in electric vehicle.
The first tabletting 251 and the second tabletting 252 of present embodiment are all made of non-magnetic stainless steel material and are made, at it
It can also be other non-magnetic alloy materials in his embodiment.The core body 21 of present embodiment, the first tabletting 251 and
Two tablettings 252 are all made of un-conducted magnetic material, are increased because permanent magnet and permeability magnetic material can additionally produce a toroid
The loss of permanent magnet reduces the efficiency of motor, if material magnetic conduction when in addition producing, is not easy to the assembly of rotor 20 and adds
Work increases production difficulty.
The side wall that the shaft hole 211 is used to form in the core body 21 is equipped with keyway 213, meanwhile, described turn
Corresponding position is equipped with the parallel key 221 cooperated with the keyway 213 on axis 22, i.e., the described core body 21 is with the shaft 22
Key connection.
It further include for positioning rotor core and shaft in order to further ensure the bonding strength of rotor core and shaft 22
22 the first pressing plate 231 and the second pressing plate 232.The shaft 22 is equipped with the positioning table for positioning 232 position of the second pressing plate
Rank, second pressing plate 232 are tightly attached to 21 side of core body, and the shaft hole of the core body 21 by positioning step
211 are surrounded by pin hole 216, and second pressing plate 232 is equipped with the through-hole cooperated with the pin hole 216, thus described
Core body 21 is fastenedly connected with second pressing plate 232 by pin 26；First pressing plate 231 is tightly attached to the iron core sheet
21 other side of body, i.e., described first pressing plate 231 are respectively arranged on 21 two opposite sides of core body with second pressing plate 232
Face；First pressing plate 231 is close to by jam nut 24 with the core body 21.Specifically, the jam nut 24
Internal diameter is matched with the outer diameter of 22 corresponding site of shaft, and the two being threaded by mating surface, to make jam nut
24 push down the first pressing plate 231, lock core body 21.First pressing plate 231 and the second cooperation jointly of pressing plate 232, further
Improve the bonding strength of rotor core Yu shaft 22.In addition, the first pressing plate 231 of present embodiment, the second pressing plate 232 and
Jam nut 24 is all made of aluminum alloy materials and is made, and reduces 20 overall weight of rotor, to reduce the rotary inertia of rotor 20, protects
The intensity of rotor 20 is demonstrate,proved.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (10)
1. a kind of rotor core characterized by comprising core body is opened in the shaft hole at the core body center, with
And the magnetic slot of the circumferencial direction uniform intervals arrangement along the core body, the quantity of the magnetic slot are even number；It is described
The shape of magnetic slot is irregular fan annular, and two arcs and the shaft hole of the irregular fan annular are concentric, described
The intersection point of the extended line of two straight flanges of irregular fan annular is located in the core body, and the intersection point and the shaft
The axle center in hole is not overlapped.
2. rotor core according to claim 1, which is characterized in that be used to form the shaft hole in the core body
Side wall be equipped with keyway.
3. rotor core according to claim 1, which is characterized in that two straight flanges of the irregular fan annular prolong
It is 30 ° -50 ° that long line, which is formed by angular range,.
4. rotor core according to claim 1, which is characterized in that be also provided in the core body along the iron core
First aeration structure of the circumferencial direction uniform intervals setting of ontology, first aeration structure are set to the two neighboring magnet steel
Between slot, and the quantity of first aeration structure is identical as the quantity of the magnetic slot.
5. rotor core according to claim 4, which is characterized in that first aeration structure includes two first ventilations
Hole, the shape of two first ventilation holes are fan annular.
6. rotor core according to claim 1-5, which is characterized in that along the shaft in the core body
The circumferencial direction in hole offers the second aeration structure of circle uniform intervals setting；Second aeration structure is set to the magnetic
Between steel tank and the shaft hole.
7. a kind of rotor, which is characterized in that including rotor core as claimed in any one of claims 1 to 6, be arranged in described turn
Shaft in sub- iron core shaft hole, the permanent magnet in the magnetic slot, and it is respectively arranged on the rotor core two relatively
The first tabletting and the second tabletting of side.
8. rotor according to claim 7, which is characterized in that be equipped in first tabletting and second tabletting logical
Slot, the position of the through slot and quantity respectively with the position of the magnetic slot and quantity Matching.
9. rotor according to claim 8, which is characterized in that the shape one of the shape of the through slot and the magnetic slot
It causes, and the size of the through slot is less than the size of the magnetic slot.
10. rotor according to claim 8, which is characterized in that the area ratio of the area and through slot of the magnetic slot
Range is 1.2-1.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820544259.6U CN208241423U (en) | 2018-04-17 | 2018-04-17 | Rotor core and rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820544259.6U CN208241423U (en) | 2018-04-17 | 2018-04-17 | Rotor core and rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208241423U true CN208241423U (en) | 2018-12-14 |
Family
ID=64583691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820544259.6U Active CN208241423U (en) | 2018-04-17 | 2018-04-17 | Rotor core and rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208241423U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113785474A (en) * | 2021-05-31 | 2021-12-10 | 华为技术有限公司 | Motor rotor, driving motor and electric automobile |
-
2018
- 2018-04-17 CN CN201820544259.6U patent/CN208241423U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113785474A (en) * | 2021-05-31 | 2021-12-10 | 华为技术有限公司 | Motor rotor, driving motor and electric automobile |
| CN113785474B (en) * | 2021-05-31 | 2024-05-14 | 华为数字能源技术有限公司 | Motor rotor, driving motor and electric automobile |
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