CN208835846U - Motor stator, motor and bus - Google Patents
Motor stator, motor and bus Download PDFInfo
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- CN208835846U CN208835846U CN201821527123.0U CN201821527123U CN208835846U CN 208835846 U CN208835846 U CN 208835846U CN 201821527123 U CN201821527123 U CN 201821527123U CN 208835846 U CN208835846 U CN 208835846U
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Abstract
The utility model provides a kind of motor stator, motor and bus.The motor stator includes stator tooth (1), stator tooth (1) includes root portion (2) and tooth crest (3), tooth crest (3) is arranged on root portion (2), tooth crest (3) includes the first tooth top unit (4) and the second tooth top unit (5), first tooth top unit (4) and the second tooth top unit (5) are arranged along the circumferential of motor stator in the two sides of root portion (2), and form tooth top air gap (6) between the first tooth top unit (4) and the second tooth top unit (5).Motor stator according to the present utility model can reduce leakage field, improve permanent magnet utilization rate, improve output torque.
Description
Technical field
The utility model belongs to technical field of motors, and in particular to a kind of motor stator, motor and bus.
Background technique
Low speed high torque motor is suitable for many occasions, such as electric vehicle driving, high-speed rail driving, elevator, mine.It is usually low
Fast big torque motor number of poles is more, and number of stator slots is accordingly doubled and redoubled, and causes processing difficulties, difficulty in process.Proximal pole slot permanent magnetism is same
Step motor is very suitable to low speed high torque motor, and number of stator slots is close with rotor number of poles, can solve problem above.
As shown in Figure 1, proximal pole slot permanent-magnetic synchronous motor stator tooth crest 1 ' is wider, with rotor pole arc similar length, cause
The magnetic linkage that permanent magnet generates has quite a few to be directly closed by the top of stator tooth 1 ', only by leakage magnetic circuit 3 ' without master
Magnetic circuit 2 '.This part magnetic linkage will not generate effective torque, therefore can reduce permanent magnet utilization rate.Leakage field at the top of stator tooth but also
Enter saturation state at the top of stator tooth too early, further weakens motor torque output, simultaneously as each tooth degree of saturation is different,
Torque pulsation will also increase.
Therefore existing proximal pole slot permanent magnet synchronous motor, since stator tooth top and rotor pole arc are close and there are tooth top leakages
Magnetic, tooth crest closure is only passed through in magnetic field zigzag leakage part, without yoke portion.Zigzag leakage will cause permanent magnet utilization rate it is low,
The negative effects such as motor tooth crest is saturated too early, torque pulsation is big.
Utility model content
Therefore, the technical problem to be solved by the present invention is to provide a kind of motor stator, motor and buses, can subtract
Few leakage field, improves permanent magnet utilization rate, improves output torque.
To solve the above-mentioned problems, the utility model provides a kind of motor stator, including stator tooth, and stator tooth includes tooth root
Portion and tooth crest, tooth crest are arranged on root portion, and tooth crest includes the first tooth top unit and the second tooth top unit, the first tooth top
The two sides of root portion, and the first tooth top unit and the second tooth top are arranged in along the circumferential direction of motor stator for unit and the second tooth top unit
Tooth top air gap is formed between unit.
Preferably, tooth top air gap radially runs through the first tooth top unit and the second tooth top unit, and by the first tooth top
Unit and the second tooth top unit interval are opened.
Preferably, tooth top air gap from the first tooth top unit and the second tooth top unit close to one end of root portion radially
Extend, the first tooth top unit and the second tooth top unit are docking together in one end far from root portion, and close tooth top air gap.
Preferably, the first tooth top unit and the second tooth top unit are integrally formed.
Preferably, docked between the first tooth top unit of stator tooth and the second tooth top unit of adjacent stators tooth to be formed it is silent
Slot.
Preferably, it is integrally formed between the first tooth top unit of stator tooth and the second tooth top unit of adjacent stators tooth.
Preferably, it is connected and fixed between the first tooth top unit and the second tooth top unit and root portion.
Preferably, the first card slot of the axial direction extension along motor stator, the first tooth top unit are provided on root portion
It is connected in the first card slot；And/or the second axially extending card slot along motor stator, the second tooth top are provided on root portion
Unit is connected in the second card slot.
Preferably, the cross sectional shape of the first card slot and/or the second card slot is trapezoidal, soil font or major arc shape.
Preferably, on the section perpendicular to the central axis of motor stator, the width of tooth top air gap is W1, wherein
0.15*WT≤W1≤0.3*WT；
In formula, DSFor stator outer diameter, NSFor number of stator slots.
Preferably, on the section perpendicular to the central axis of motor stator, the length of tooth top air gap is L1, wherein
0.2*LT≤L1≤0.4*LT；
In formula, DSFor stator outer diameter, DYFor stator slot bottom position diameter.
Preferably, tooth crest, which uses, has grain-oriented Si steel sheet to be made.
Another aspect according to the present utility model provides a kind of motor, including motor stator, which is above-mentioned
Motor stator.
It is according to the present utility model in another aspect, a kind of bus is provided, including above-mentioned motor stator.
Motor stator provided by the utility model, including stator tooth, stator tooth include root portion and tooth crest, and tooth crest is set
It sets on root portion, tooth crest includes the first tooth top unit and the second tooth top unit, the first tooth top unit and the second tooth top unit
The two sides of root portion are set along the circumferential direction of motor stator, and form tooth top gas between the first tooth top unit and the second tooth top unit
Gap.The motor stator of the application handles the tooth crest of stator tooth, by tip portion at the first tooth top unit and second
Tooth top unit, and it is formed with tooth top air gap between the first tooth top unit and the second tooth top unit, since the magnetic resistance of tooth top air gap is remote
Greater than the magnetic resistance of stator core, therefore the magnetic field that permanent magnet generates on rotor can be made to get around tooth top gas when passing through stator tooth
Gap is changed to return to permanent magnet closure by stator yoke, that is, the leakage magnetic flux being closed by leakage magnetic circuit is changed to be closed through main magnetic circuit
Main flux, reach reduction leakage field, improve permanent magnet utilization rate, improve the purpose of output torque, while reducing stator tooth
The degree of saturation of tooth crest improves the working performance of motor.
Detailed description of the invention
Fig. 1 is the magnetic circuit schematic diagram of proximal pole slot permanent magnet synchronous motor in the prior art；
Fig. 2 is the magnetic conduction schematic diagram for having grain-oriented Si steel sheet；
Fig. 3 is the teeth portion structural schematic diagram of the motor stator of the utility model embodiment；
Fig. 4 is the teeth portion structure size figure of the motor stator of the utility model embodiment；
Fig. 5 is the structural representation of the adjacent stators tooth tooth crest merging treatment of the motor stator of the utility model embodiment
Figure；
Fig. 6 is that the stator tooth tooth crest of the motor stator of the utility model embodiment and adjacent stators tooth tooth crest merge
The structural schematic diagram of processing；
Fig. 7 is another fit structure schematic diagram of the stator tooth tooth crest of the motor stator of the utility model embodiment；
Fig. 8 is another fit structure schematic diagram of the stator tooth tooth crest of the motor stator of the utility model embodiment；
Fig. 9 is the magnetic circuit figure of proximal pole slot permanent magnet synchronous motor in the prior art；
Figure 10 is the magnetic circuit figure of the motor of the utility model embodiment；
Figure 11 is influence curve figure of the tooth top size W1 to motor flux leakage coefficient；
Figure 12 is influence curve figure of the tooth top size L1 to tooth crest flux density；
Figure 13 is the air gap magnetic density waveform comparison diagram of conventional proximal pole slot motor and the utility model motor；
Figure 14 is influence curve figure of the tooth top size W1 to torque pulsation；
Figure 15 is influence curve figure of the tooth top size W1 to torque output；
Figure 16 is influence curve figure of the tooth top size L1 to torque output.
Appended drawing reference indicates are as follows:
1, stator tooth；2, root portion；3, tooth crest；4, the first tooth top unit；5, the second tooth top unit；6, tooth top air gap；
7, the first card slot；8, the second card slot.
Specific embodiment
Noun paraphrase in part in the application:
Proximal pole slot permanent magnet synchronous motor: magneto (N similar in number of stator teeth and rotor number of polesS=2p ± 1；NS=2p ±
2, NSIndicate the number of teeth, p indicates number of pole-pairs), stator tooth top width and polar arc similar width；
Leakage field: refer to the magnetic field being closed in motor without main magnetic circuit, effective torque cannot be generated, will also leakage field be caused to pass through
Part core sataration；
Main magnetic circuit: air gap, stator teeth, stator yoke, stator teeth, air gap are passed through again in the magnetic field that rotor permanent magnet issues
Rotor closure is returned to, this magnetic field channel is known as main magnetic circuit, is the path that motor works normally magnetic field closure；
Leakage magnetic circuit: the magnetic circuit channel that magnetic field is directly closed without main magnetic circuit is known as leakage magnetic circuit.
In conjunction with to shown in Figure 16, embodiment according to the present utility model, motor stator includes stator tooth 1, stator referring to fig. 2
Tooth 1 includes root portion 2 and tooth crest 3, and tooth crest 3 is arranged on root portion 2, and tooth crest 3 includes the first tooth top unit 4 and second
The two sides of root portion 2 are arranged in along the circumferential direction of motor stator for tooth top unit 5, the first tooth top unit 4 and the second tooth top unit 5, and
Tooth top air gap 6 is formed between first tooth top unit 4 and the second tooth top unit 5.Tooth top air gap 6 is in the first tooth top unit 4 and second
The air gap is formed between tooth top unit 5, the first tooth top unit 4 and the second tooth top unit 5 can at least partly be separated.
The motor stator of the application handles the tooth crest 3 of stator tooth 1, and tooth crest 3 is divided into the first tooth top list
Member 4 and the second tooth top unit 5, and it is formed with tooth top air gap 6 between the first tooth top unit 4 and the second tooth top unit 5, due to tooth top
The magnetic resistance of air gap 6 is much larger than the magnetic resistance of stator core, therefore the magnetic field that permanent magnet generates on rotor can be made to pass through stator tooth 1
When get around tooth top air gap 6, be changed to return to permanent magnet closure by stator yoke, that is, the leakage magnetic flux being closed by leakage magnetic circuit is changed
For the main flux being closed through main magnetic circuit, reach reduction leakage field, improves permanent magnet utilization rate, improve the purpose of output torque, simultaneously
The degree of saturation for reducing the tooth crest of stator tooth improves the working performance of motor.
Above-mentioned motor stator is, for example, proximal pole slot permanent-magnetic synchronous motor stator.The utility model is by by proximal pole slot permanent magnetism
Synchronous motor stator tip portion half reduces addendum width and is equivalent to so that there are two smaller tooth top units for each stator tooth tool
Increase the magnetic resistance in tooth top tangential (leakage field direction), magnetic resistance increase can effectively reduce the leakage field of this part, and two tooth top lists
Top gas gap 6 with teeth is designed between member, the magnetic resistance of tooth top air gap 6 is larger, further decreases zigzag leakage.
In one of them embodiment, tooth top air gap 6 radially runs through the first tooth top unit 4 and the second tooth top list
Member 5, and the first tooth top unit 4 and the second tooth top unit 5 are spaced apart, as shown in Figure 3 and Figure 4.In the present embodiment, the first tooth
It is spaced apart completely by tooth top air gap 6 between top unit 4 and the second tooth top unit 5, tooth top can be blocked completely by tooth top air gap 6
Leakage field further increases permanent magnet utilization rate, improves output torque.
In another embodiment, tooth top air gap 6 is from the first tooth top unit 4 and the second tooth top unit 5 close to root portion 2
One end extend in a radial direction, the first tooth top unit 4 and the second tooth top unit 5 are docked at one in one end far from root portion 2
It rises, and closes tooth top air gap 6, as shown in Figure 6.In the present embodiment, the top of the first tooth top unit 4 is towards the second tooth top unit
5 stretch out a protrusion, and raised, two protrusion docking are stretched out towards the first tooth top unit 4 in the top of the second tooth top unit 5, thus
The top opening of tooth top air gap 6 is closed, closed tooth top air gap 6 is formed.In the structure tooth crest 3 close to stator and rotor it
Between the part of air gap use merging treatment, therefore stator surface may be implemented without notch, the air gap of rotor and stator can be made
Place's magnetic resistance change rate is more smooth, and torque pulsation is smaller.
Preferably, the first tooth top unit 4 and the second tooth top unit 5 are integrally formed, and have better structural behaviour.First tooth
It can also be connected to one by modes such as bondings between top unit 4 and the second tooth top unit 5.
In one embodiment of the utility model, the first tooth top unit 4 and the second of adjacent stators tooth 1 of stator tooth 1
Docking forms closed slot between tooth top unit 5, as shown in Figure 5 and Figure 6.In the present embodiment, between two adjacent stator tooths 1
Two tow-part stator tooth crest merging treatments namely stator tooth 1 the first tooth top unit 4 and another stator tooth 1
Merging treatment between second tooth top unit 5 forms stator combination tooth crest, passes through between stator combination tooth crest and root portion 2
It snaps connection, constitutes the stator teeth of proximal pole slot permanent magnet synchronous motor.The stator teeth of merging treatment closes stator rabbet, shape
At closed slot, at the same the mode snapped connection allow motor first offline re-closed tooth top, solve the offline difficulty of closed slot
The problem of.The stator of merging treatment has closed slot, in conjunction with point semi-processed degree of saturation magnetic resistance reduced at the top of stator tooth, makes
It is smooth to obtain magnetic resistance change rate at the air gap between stator and rotor, to optimize air gap magnetic density waveform, hence it is evident that reduce torque pulsation, such as
Shown in Figure 13.
Preferably, between the first tooth top unit 4 of stator tooth 1 and the second tooth top unit 5 of adjacent stators tooth 1 integrally at
Type.
Preferably, it is connected and fixed between the first tooth top unit 4 and the second tooth top unit 5 and root portion 2, can simplify first
Cooperation difficulty between tooth top unit 4 and the second tooth top unit 5 and root portion 2 reduces processing cost.
In the present embodiment, be provided on root portion 2 along motor stator axial direction extension the first card slot 7, first
Tooth top unit 4 is connected in the first card slot 7；And/or the second axially extending card along motor stator is provided on root portion 2
Slot 8, the second tooth top unit 5 are connected in the second card slot 8.The structure of first card slot 7 and the second card slot 8 can be identical, improves the
Structural symmetry between one tooth top unit 4 and the second tooth top unit 5.
In the present embodiment, the axial direction of the first tooth top unit 4 and the second tooth top unit 5 on root portion 2 about root portion 2
The plane in direction is symmetrical arranged, and the first card slot 7 and the second card slot 8 are also symmetrical about the plane, so as to reduce the first tooth top
The difficulty of processing and processing cost of unit 4 and the second tooth top unit 5 reduce die sinking quantity, reduce mold opening cost.
Preferably, the cross sectional shape of the first card slot 7 and/or the second card slot 8 is trapezoidal, soil font or major arc shape.First card
The cross sectional shape of slot 7 and/or the second card slot 8 may be other shapes, such as swallow-tail form either sector etc..
On the section perpendicular to the central axis of motor stator, the width of tooth top air gap 6 is W1, wherein
0.15*WT≤W1≤0.3*WT；
In formula, DSFor stator outer diameter, NSFor number of stator slots.
On the section perpendicular to the central axis of motor stator, the length of tooth top air gap 6 is L1, wherein
0.2*LT≤L1≤0.4*LT；
In formula, DSFor stator outer diameter, DYFor stator slot bottom position diameter.
When W1 and L1 at least one of which meets above-mentioned condition, it can be effectively improved the properties of motor torque.
Tooth crest 3, which uses, has grain-oriented Si steel sheet to be made.
Using two advantages for having grain-oriented Si steel sheet, 1, only one direction can with magnetic conduction, by by main magnetic circuit direction with
There is grain-oriented Si steel sheet magnetic conduction direction identical, and leakage field field direction is orthogonal with there is grain-oriented Si steel sheet magnetic conduction direction, as shown in Fig. 2, knot
A point semi-processed stator teeth is closed, it is more obvious to weaken leakage field effect；2, there is the magnetic conduction ability in its magnetic conduction direction of grain-oriented Si steel sheet
It is better than conventional non-oriented silicon steel sheet, which can greatly reduce the degree of saturation of the tooth crest 3 of stator tooth 1, make stator
Magnetic resistance is smoother at air gap between rotor, and torque pulsation further decreases.
Embodiment according to the present utility model, motor include motor stator, which is above-mentioned motor stator.It should
Motor is preferably proximal pole slot permanent magnet synchronous motor.
Embodiment according to the present utility model, bus include above-mentioned motor stator.
Those skilled in the art will readily recognize that above-mentioned each advantageous manner can be free under the premise of not conflicting
Ground combination, superposition.
The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all practical at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the guarantor of the utility model within novel spirit and principle
Within the scope of shield.Above are merely preferred embodiments of the utility model, it is noted that for the ordinary skill of the art
For personnel, without deviating from the technical principle of the utility model, several improvements and modifications can also be made, these improvement
It also should be regarded as the protection scope of the utility model with modification.
Claims (14)
1. a kind of motor stator, which is characterized in that including stator tooth (1), the stator tooth (1) includes root portion (2) and tooth top
Portion (3), the tooth crest (3) are arranged on the root portion (2), and the tooth crest (3) includes the first tooth top unit (4) and the
Two tooth top units (5), the first tooth top unit (4) and the second tooth top unit (5) exist along the circumferential setting of motor stator
The two sides of the root portion (2), and tooth top gas is formed between the first tooth top unit (4) and the second tooth top unit (5)
Gap (6).
2. motor stator according to claim 1, which is characterized in that the tooth top air gap (6) radially runs through institute
The first tooth top unit (4) and the second tooth top unit (5) are stated, and will be between the first tooth top unit (4) and the second tooth top unit (5)
It separates.
3. motor stator according to claim 1, which is characterized in that the tooth top air gap (6) is from the first tooth top list
First (4) and the second tooth top unit (5) are extended in a radial direction close to the one end of the root portion (2), the first tooth top unit
(4) it is docking together with the second tooth top unit (5) in one end far from the root portion (2), and closes the tooth top gas
Gap (6).
4. motor stator according to claim 3, which is characterized in that the first tooth top unit (4) and second tooth
Unit (5) are pushed up to be integrally formed.
5. motor stator according to claim 1, which is characterized in that the first tooth top unit (4) of the stator tooth (1) with
Docking forms closed slot between second tooth top unit (5) of adjacent stators tooth (1).
6. motor stator according to claim 5, which is characterized in that the first tooth top unit (4) of the stator tooth (1) with
It is integrally formed between second tooth top unit (5) of adjacent stators tooth (1).
7. motor stator according to any one of claim 1 to 6, which is characterized in that the first tooth top unit (4) and
It is connected and fixed between the second tooth top unit (5) and the root portion (2).
8. motor stator according to claim 7, which is characterized in that be provided on the root portion (2) along the motor
The first card slot (7) that the axial direction of stator extends, the first tooth top unit (4) are connected in first card slot (7)；
And/or axially extending the second card slot (8) along the motor stator, second tooth top are provided on the root portion (2)
Unit (5) is connected in second card slot (8).
9. motor stator according to claim 8, which is characterized in that first card slot (7) and/or second card slot
(8) cross sectional shape is trapezoidal, soil font or major arc shape.
10. motor stator according to any one of claim 1 to 6, which is characterized in that in perpendicular to motor stator
On the section of mandrel line, the width of the tooth top air gap (6) is W1, wherein
0.15*WT≤W1≤0.3*WT；
In formula, DSFor stator outer diameter, NSFor number of stator slots.
11. motor stator according to any one of claim 1 to 6, which is characterized in that in perpendicular to motor stator
On the section of mandrel line, the length of the tooth top air gap (6) is L1, wherein
0.2*LT≤L1≤0.4*LT；
In formula, DSFor stator outer diameter, DYFor stator slot bottom position diameter.
12. motor stator according to any one of claim 1 to 6, which is characterized in that the tooth crest (3), which uses, to be had
Grain-oriented Si steel sheet is made.
13. a kind of motor, including motor stator, which is characterized in that the motor stator is any one of claims 1 to 12 institute
The motor stator stated.
14. a kind of bus, which is characterized in that including motor stator described in any one of claims 1 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821527123.0U CN208835846U (en) | 2018-09-19 | 2018-09-19 | Motor stator, motor and bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821527123.0U CN208835846U (en) | 2018-09-19 | 2018-09-19 | Motor stator, motor and bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208835846U true CN208835846U (en) | 2019-05-07 |
Family
ID=66313851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821527123.0U Active CN208835846U (en) | 2018-09-19 | 2018-09-19 | Motor stator, motor and bus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208835846U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109120080A (en) * | 2018-09-19 | 2019-01-01 | 珠海格力电器股份有限公司 | Motor stator, motor and bus |
-
2018
- 2018-09-19 CN CN201821527123.0U patent/CN208835846U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109120080A (en) * | 2018-09-19 | 2019-01-01 | 珠海格力电器股份有限公司 | Motor stator, motor and bus |
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