CN209030000U - A kind of permanent-magnet brushless DC electric machine stator punching - Google Patents
A kind of permanent-magnet brushless DC electric machine stator punching Download PDFInfo
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- CN209030000U CN209030000U CN201822116963.4U CN201822116963U CN209030000U CN 209030000 U CN209030000 U CN 209030000U CN 201822116963 U CN201822116963 U CN 201822116963U CN 209030000 U CN209030000 U CN 209030000U
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- Brushless Motors (AREA)
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Abstract
The utility model relates to a kind of permanent-magnet brushless DC electric machine stator punchings, the stator punching includes the stator yoke of annular, the periphery of the stator yoke is equipped with stator tooth, stator slot is formed between two neighboring stator tooth, the stator tooth end is equipped with the crown that outside is circular arc, notch is formed between two neighboring crown, the ratio of central angle corresponding to central angle corresponding to the stator slot and notch is 5.700 ~ 5.800.The beneficial effects of the utility model are: being to weaken cogging torque by reducing width of rebate between 5.700 ~ 5.800, and make the width of notch convenient for winding inserting technique for the ratio setting of central angle corresponding to central angle corresponding to stator slot and notch.
Description
Technical field
The utility model relates to brushless motor field more particularly to a kind of permanent-magnet brushless DC electric machine stator punchings.
Background technique
The stator of external rotor electric machine is generally connected and fixed by fastener by multi-disc stator punching and is made, in external rotor electric machine
Stator in stator slot and notch be stator outer circle a part.
Interact between permanent magnet and stator core the torque of generation when cogging torque is magneto winding no power,
Caused by being the tangential component as interaction force between permanent magnet and stator tooth.
Cogging torque can make motor generate vibration and noise, the fluctuation of speed occur, prevent motor from even running, influence electricity
The performance of machine.In variable speed drives, when torque pulsation frequency is consistent with the mechanical resonance frequency of stator or rotor, cogging torque
The vibration of generation and noise will be amplified.The presence of cogging torque equally affects low speed of the motor in speed control system
It can be with the high accuracy positioning in position control system.So the engineer for doing magneto research and development wishes self-made motor
Cogging torque is minimized, and the cogging torque of this motor on hand is then wanted to know about using the engineer of magneto, to go
Optimize his control algolithm.
Utility model content
The purpose of the utility model is to overcome problem above of the existing technology, provide a kind of permanent magnet brushless dc
Motor stator punching.
To realize above-mentioned technical purpose and the technique effect, the utility model is achieved through the following technical solutions:
A kind of permanent-magnet brushless DC electric machine stator punching, the stator punching include the stator yoke of annular, the stator yoke
Periphery be equipped with stator tooth, stator slot is formed between two neighboring stator tooth, it is circular arc that the stator tooth end, which is equipped with outside,
Crown forms notch between two neighboring crown, central angle corresponding to central angle corresponding to the stator slot and notch
Ratio is 5.700 ~ 5.800.
Wherein, the both ends on the outside of the crown are equipped with fillet A, and the both ends on the inside of the crown are equipped with fillet B.
Wherein, the junction of the stator tooth and crown is equipped with fillet C, and the stator tooth and stator yoke junction are equipped with circle
Angle D.
Wherein, the ratio of central angle corresponding to central angle and stator tooth corresponding to the crown is 3.001 ~ 3.099.
Wherein, the ratio of the outer diameter of the stator punching and stator punching internal diameter is 2.482 ~ 2.491.
Wherein, the axis hole side wall at the stator yoke center is equipped with to axis hole center positioning protrusion outstanding.
Wherein, it is connected after stator punching described in multi-disc stacks by rivet.
The beneficial effects of the utility model are: by the ratio of central angle corresponding to central angle corresponding to stator slot and notch
Example is set as between 5.700 ~ 5.800, weakens cogging torque by reducing width of rebate, and makes the width of notch convenient for winding
Inserting-coil process helps the control of winding copper factor between 75 ~ 78%, stator is made to have good heat dissipation performance.
Detailed description of the invention
Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application,
The exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the improper of the utility model
It limits.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the utility model embodiment；
Fig. 2 is the amplified structural schematic diagram of part B in Fig. 1；
Fig. 3 is the amplified structural schematic diagram of C portion in Fig. 1.
Specific embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, the utility model is described in detail.
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of permanent-magnet brushless DC electric machine stator punching, stator punching include the stator of annular
Yoke 1, the periphery of stator yoke 1 are equipped with 12 stator tooths 2, form stator slot 4 between two neighboring stator tooth 2,2 end of stator tooth is set
Having outside is the crown 3 of circular arc, and notch 5 is formed between two neighboring crown 3, and central angle corresponding to stator slot 4 is 21.49 °,
Central angle corresponding to notch 5 is 3.72 °, and the ratio of central angle corresponding to central angle corresponding to stator slot 4 and notch 5 is
5.777。
By the ratio setting of central angle corresponding to central angle corresponding to stator slot and notch be 5.700 ~ 5.800 it
Between, weaken cogging torque by reducing width of rebate, and make the width of notch convenient for winding inserting technique, helps slot for winding
Full rate control makes stator have good heat dissipation performance between 75 ~ 78%.
The both ends in 3 outside of crown are equipped with the fillet A7 that radius is 0.3mm, and it is 0.5mm that the both ends of 3 inside of crown, which are equipped with radius,
Fillet B8.On the one hand the setting of fillet A7 can change the shape of air gap and be close with the square-wave form of air gap flux density, thus
It enables air gap flux density square wave more preferable, reduces the counter electromotive force harmonic content of stator, and then make cogging torque and torque pulsation also phase
It should reduce；It on the other hand is in order to avoid generating magnetic saturation by wedge angle, to reduce noise.In addition, the setting of fillet A7, is not necessarily to
Additional working process is carried out to magnet, it is easy to process, reduce manufacturing cost.
The junction of stator tooth 2 and crown 3 is equipped with the fillet C9 that radius is 1.5mm, stator tooth 2 and 1 junction of stator yoke
Equipped with the fillet D10 for being 1.2mm equipped with radius.The setting of fillet C9 and fillet D10 increase stator tooth 2 and crown 3, stator yoke 1
The sectional area of junction reduces electromagnetic circuit and is locally saturated, reduce the loss of electric machine, optimizes electromagnetic circuit.
Central angle corresponding to crown 3 is 26.28 °, and central angle corresponding to stator tooth 2 is 8.51 °, corresponding to crown 3
Central angle and stator tooth 2 corresponding to central angle ratio be 3.088.
The outer diameter of stator punching is 74.6 ± 0.02mm, and stator punching internal diameter is 30.0 ± 0.04mm, stator punching it is outer
The ratio of diameter and stator punching internal diameter is 2.482 ~ 2.491.
The axis hole side wall at 1 center of stator yoke is equipped with to axis hole center positioning protrusion 11 outstanding, the width of positioning protrusion 11
Degree is 1.1mm.The setting of positioning protrusion 11 facilitates the fixation position of determining pedestal and stator.
Multi-disc stator punching stack after by rivet connect, monolithic stator punching with a thickness of 0.5mm, multi-disc stator punching
Overall thickness after stacking is between 10 ~ 40mm.
Basic principles, main features, and advantages of the present invention has been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.
Claims (7)
1. a kind of permanent-magnet brushless DC electric machine stator punching, it is characterised in that: the stator punching includes the stator yoke of annular, institute
The periphery for stating stator yoke is equipped with stator tooth, and stator slot is formed between two neighboring stator tooth, and the stator tooth end is equipped with outside
For the crown of circular arc, notch is formed between two neighboring crown, corresponding to central angle corresponding to the stator slot and notch
The ratio of central angle is 5.700 ~ 5.800.
2. permanent-magnet brushless DC electric machine stator punching according to claim 1, it is characterised in that: two on the outside of the crown
Head is equipped with fillet A, and the both ends on the inside of the crown are equipped with fillet B.
3. permanent-magnet brushless DC electric machine stator punching according to claim 1, it is characterised in that: the stator tooth and crown
Junction be equipped with fillet C, the stator tooth and stator yoke junction are equipped with fillet D.
4. permanent-magnet brushless DC electric machine stator punching according to claim 1, it is characterised in that: corresponding to the crown
The ratio of central angle corresponding to central angle and stator tooth is 3.001 ~ 3.099.
5. permanent-magnet brushless DC electric machine stator punching according to claim 1, it is characterised in that: outside the stator punching
The ratio of diameter and stator punching internal diameter is 2.482 ~ 2.491.
6. permanent-magnet brushless DC electric machine stator punching according to claim 1, it is characterised in that: the stator yoke center
Axis hole side wall is equipped with to axis hole center positioning protrusion outstanding.
7. permanent-magnet brushless DC electric machine stator punching according to claim 1, it is characterised in that: stator punching described in multi-disc
It is connected after stacking by rivet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822116963.4U CN209030000U (en) | 2018-12-17 | 2018-12-17 | A kind of permanent-magnet brushless DC electric machine stator punching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822116963.4U CN209030000U (en) | 2018-12-17 | 2018-12-17 | A kind of permanent-magnet brushless DC electric machine stator punching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209030000U true CN209030000U (en) | 2019-06-25 |
Family
ID=66911573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822116963.4U Active CN209030000U (en) | 2018-12-17 | 2018-12-17 | A kind of permanent-magnet brushless DC electric machine stator punching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209030000U (en) |
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2018
- 2018-12-17 CN CN201822116963.4U patent/CN209030000U/en active Active
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