CN205231871U - Single -Phase permanent -Magnet motor and stator core thereof - Google Patents
Single -Phase permanent -Magnet motor and stator core thereof Download PDFInfo
- Publication number
- CN205231871U CN205231871U CN201520674767.2U CN201520674767U CN205231871U CN 205231871 U CN205231871 U CN 205231871U CN 201520674767 U CN201520674767 U CN 201520674767U CN 205231871 U CN205231871 U CN 205231871U
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- polar
- stator core
- arm
- width
- polar arm
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Abstract
The utility model provides a single -Phase permanent -Magnet motor and stator core thereof, wherein single -Phase permanent -Magnet motor includes stator core, twine winding and the rotatory permanent magnet rotor of stator relatively on stator core, stator core includes tip and the polararm that is stretched out by the tip, the polararm includes two linking arms that the interval set up and respectively formed at the utmost point claw of the end of each linking arm, it is used for holding the rotor to form the space in the claw of the two poles of the earth, utmost point claw encircles the space forms the polar arc face, the polar arc face encircles the rotor and forms the air gap with the rotor. The polar arc face upwards forms the fracture in week, the fracture is just to the interval between the linking arm, the fracture possesses changed width in the axial. Because the changed width of fracture utensil, the less fracture of width partly can effectively reduce the tooth's socket torque of motor to reduce the noise of motor.
Description
Technical field
The utility model relates to monophase machine, particularly relates to the stator core of electric machine.
Background technology
Electric machine is made up of stator core, stator winding and p-m rotor usually.Wherein, stator core roughly takes the shape of the letter U, and comprises two spaced polar arms, the end of each polar arm forms a pole pawl, the inwall concave shaped poling cambered surface of each pole pawl, and namely described winding is wound on polar arm, described rotor is then arranged between the pawl of the two poles of the earth, relative with polar arc face.The polar arm of the stator core of this kind of motor is separated and arranges, and be formed with larger breach between the pawl of the two poles of the earth, described breach makes to form larger cogging torque between stators and rotators, causes the operation of motor not steady, produces noise.
Utility model content
In view of this, the utility model provides a kind of electric machine and stator core thereof, can the stability of effective lifting motor running, reduces the generation of noise.
On the one hand, the utility model provides a kind of stator core, the polar arm comprising end and stretched out by end, described polar arm comprises spaced two linking arms and is formed at the pole pawl of end of each linking arm respectively, space is formed for holding rotor in the pawl of described the two poles of the earth, described pole dog collar forms polar arc face around described space, described polar arc face disconnects formation fracture in the circumferential, described fracture is just to the interval between linking arm, described fracture has different width in the axial direction, the width at the interval between rupture portion width and linking arm is suitable, rupture portion width is less than the interval width between linking arm.
On the other hand, the utility model provides a kind of electric machine, comprise said stator magnetic core, be wound in winding on stator core and can the p-m rotor that rotates of relative stator, described rotor is arranged at the space in the pawl of the two poles of the earth, and the polar arc face surrounding rotor of described stator core also forms air gap with rotor.
Compared to prior art, the stator core of the utility model motor the polar arc face of pole pawl form fracture in the circumferential, the width of at least part of fracture reduces, and the efficiency of motor and noise two important performance indexes is weighed, the overall performance of lifting motor.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model electric machine one embodiment.
Fig. 2 is the explosive view of motor shown in Fig. 1.
Fig. 3 is the vertical view of motor shown in Fig. 1.
Fig. 4 is the upward view of motor shown in Fig. 1.
Fig. 5 is the schematic diagram of another embodiment of the magnetic core of the utility model electric machine.
Fig. 6 is the schematic diagram of an embodiment again of the magnetic core of the utility model electric machine.
Embodiment
Below in conjunction with accompanying drawing, by describing in detail embodiment of the present utility model, will make the technical solution of the utility model and other beneficial effects apparent.Be appreciated that accompanying drawing only provides reference and explanation use, be not used for being limited the utility model.The size shown in accompanying drawing is only for ease of clear description, and does not limit proportionate relationship.
Fig. 1-2 is depicted as the structural representation of the electric machine according to the utility model one embodiment, the p-m rotor 12 that described motor comprises stator core 10, is wound in the winding (not shown) on magnetic core 10 and is arranged at rotationally in magnetic core 10.In diagram, be structure and the feature of the stator core 10 of clear display the utility model motor, the subelement of motor, as not shown in winding, the circuit of controlled winding electric current, the shell of motor etc., it can be the corresponding construction in existing electric machine.Can fixedly wear a rotating shaft in described p-m rotor 12, for being connected with load, during winding energising, magnetic core 10 is polarized, promotes p-m rotor 12 rotate with the magnetic fields of p-m rotor 12, and then drives loaded work piece.
Described magnetic core 10 by soft magnetic material, as ferromagnetic material etc. is made.Preferably, in the present embodiment, described magnetic core 10 is U-shaped magnetic core, comprises end 14 and by the vertical outwardly directed polar arm 16 in described end 14.In the present embodiment, described polar arm 16 is at least made up of the first polar arm 18 and the second polar arm 20.Wherein, described first polar arm 18, second polar arm 20 being axially stacked at rotor 12, and be connected to the same side of end 14.In the present embodiment, described end 14, first polar arm 18, the second polar arm 20 respectively shaping rear mode by mechanical connection is connected, first polar arm 18, second polar arm 20 like this can be connected with end 14 after winding winding completes again, and makes the winding of winding more convenient, quick.
Preferably, described end 14, first polar arm 18, second polar arm 20, respectively by some thin slices, as stackingly in silicon steel sheet etc. to form.Only schematically show in diagram end 14, first polar arm 18, second polar arm 20 stacking shaping after monnolithic case, do not show the concrete structure of multiple-level stack.For convenience of the assembling of thin slice, pilot hole 22 can be formed all accordingly on each thin slice, pilot hole 22 described in the present embodiment is recessed blind hole, male-female engagement between the blind hole that thin slice is adjacent when stacking buckle connect, and form described end 14, first polar arm 18 and the second polar arm 20 respectively.
In the present embodiment, described end 14 is formed with draw-in groove 24 respectively in the position near its two side ends, and described draw-in groove 24 runs through described end 14 in the axial direction.Described polar arm 16, comprises the first polar arm 18 and the second polar arm 20, is formed with the fixture block 26 of corresponding described draw-in groove 24.Described fixture block 26 snaps in vertically in draw-in groove 24 and is connected with end 14 by polar arm 16, namely forms described magnetic core 10.Preferably, described draw-in groove 24 and fixture block 26 form dove-tail form buckle and are connected, and avoid connecting rear disengagement.In other embodiments, described draw-in groove 24 also can be formed on the first polar arm 18, second polar arm 20, and correspondingly described fixture block 26 is formed on end 14, similarly by snap, three is connected to form described magnetic core 10.
Described first polar arm 18 comprises two independently arms 28, and described two arm 28 structures are substantially identical, is parallel to each other and interval is arranged.Each arm 28 is all in strip, and comprise the first linking arm 30 and be formed at the first pole pawl 32 of an end of the first linking arm 30, described first pole pawl 32 is away from end 14.Described first linking arm 30, towards the described fixture block 26 of the outwardly formation of end face of another end of end 14, is connected with the draw-in groove 24 of end 14.First pole pawl 32 of described two arms 28 relatively and interval arrange, and jointly define the space of collecting rotor 12.Described two first pole pawls 32 internal face is in opposite directions recessed to form the first polar arc face 34, corresponding with the outer surface of rotor 12 and separately, forms air gap.
The two first pole pawls 32 due to the first polar arm 18 are separated and arrange, the space from end of two first pole pawls 32 forms the first opening 33, thus the first polar arc face 34 is arranged in disconnecting in the circumferential, the width disconnected, and the width at the interval namely between the width of the first opening 33 and the first linking arm 30 is suitable.Because the first polar arc face 34 disconnects and the width disconnected is comparatively large in the circumferential, form larger magnetic resistance at open position place on the one hand, avoid leakage field, thus ensure the efficiency of motor; But form larger cogging torque at open position place on the other hand, affect the rotation of rotor 12, cause the generation of noise.
Preferably, described first polar arc face 34 is established the startup groove 36 of indent, described startup groove 36 departs from central shaft X (as shown in Figure 3) certain angle of the first pole pawl 32.In the present embodiment, described startup groove 36 is two, and the central shaft about rotor 12 is symmetric respectively by the end of each the first pole pawl 32, namely away from one end of the first linking arm 30, circumferentially extend internally, and the degree of depth increases gradually.Groove 36 is started owing to arranging, non-uniform gap is formed between first polar arc face 34 and rotor 12, so make motor when power-off shuts down, the pole axis (namely through the axis at two rotor magnetic pole centers) of rotor 12 departs from the central shaft X certain angle of the first pole pawl 32, namely avoiding dead-centre position, guaranteeing that motor can start smoothly when being again energized.
Described second polar arm 20 also comprises two independently arms 38, and described two arm 38 structures are substantially identical, is parallel to each other and interval is arranged.Each arm 38 is all in strip, and comprise the second linking arm 40 and be formed at the second pole pawl 42 of an end of the second linking arm 40, described second pole pawl 42 is away from end 14.Described second linking arm 40, towards the described fixture block 26 of the outwardly formation of end face of another end of end 14, is connected with the draw-in groove 24 of end 14.Second pole pawl 42 of described two arms 38 relatively and interval arrange, and jointly define the space of collecting rotor 12.Described two second pole pawls 42 internal face is in opposite directions recessed to form the second polar arc face 44, corresponding with the outer surface of rotor 12 and separately, forms air gap.
In the present embodiment, each second pole pawl 44 is roughly c-shaped, the both sides of its circumference are laterally protruding relative to the second linking arm 40 is formed with inside and outside two wall portion 46,48, and described wall portion 46,48 is almost parallel relative to end 14, corresponding interval between two second linking arms 40.Preferably, the length that described wall portion 46,48 is stretched out is less than the half of the width at the interval between two second linking arms 40.Arm 38 like this is after assembled: two inner wall parts 46 of two second pole pawls 34 are arranged in opposite directions, forms one second opening 47 between end; Two outside wall portions 48 are arranged in opposite directions, form one second opening 49 between end.The position of described two openings 47,49 is just to the central authorities at the interval of two second linking arms 40, and width, much smaller than the width at the interval between the second linking arm 40, is also the width of the first opening 33.
The two second pole pawls 42 due to the second polar arm 20 are separated and arrange, and the second polar arc face 44 is arranged in disconnecting in the circumferential.In addition, because the both sides of the second pole pawl 42 form wall portion 46,48, the therefore width that disconnects in the circumferential of the second polar arc face 44, i.e. opening 47,49 width in the circumferential, the interval between the second linking arm 40.So, although the second polar arc face 44 disconnects in the circumferential, the width disconnected is little, while avoiding leakage field, reduces the cogging torque of motor, ensures the smooth rotation of rotor 12.
Preferably, the width that described second polar arc face 44 disconnects in the circumferential is less than 4 times of the width of the air gap between the second polar arc face 44 and rotor 12, and 2 times that are less than the width of air gap better.In addition, described two openings 47,49 can have different width, and that is the second polar arc face 44 diverse location in the circumferential can disconnect different width.In the present embodiment, the minimum widith that the second polar arc face 44 disconnects is about 2 times of the width of the air gap between the second polar arc face 44 and rotor 12, while reducing leakage field, reduce cogging torque as far as possible as far as possible.
Please refer to Fig. 3 and Fig. 4, at rotor 12 axially, described first polar arm 18 is mutually stacked with the second polar arm 20, and wherein each first linking arm 30 and one second linking arm 40 are stacked, and forms a linking arm of polar arm 16 respectively.In the present embodiment, two linking arm parallel interval of polar arm 16 are arranged, and form winding space between the two.Described winding is wound on described two linking arms, and usual two windings are in series.Described two first pole pawls 32 are stacked with one second pole pawl 42 respectively, and the common pole pawl forming polar arm 16, for acting on rotor 12.Described first polar arc face 34 and the second polar arc face 44 are substantially in coaxial setting, and diameter is suitable, the common polar arc face forming polar arm 16.Described polar arc face is roughly cylindric, surrounding rotor 12, and forms air gap with rotor 12.
In the axial direction, the position that the first polar arc face 34 disconnects in the circumferential is just to the position that the second polar arc face 44 disconnects in the circumferential, and namely the first opening 33 is just to the second opening 47,49, and whole polar arc face is in the circumferential in disconnecting shape.The width disconnected due to the second polar arc face 44 is less than the first polar arc face 44, and therefore the fracture in whole polar arc face is stepped in the axial direction, the vicissitudinous width of tool.Particularly, the partial width in the corresponding first polar arc face 26 of the fracture in described polar arc face is comparatively large, suitable with the width at interval between winding section; The partial width in corresponding second polar arc face 36 is less, much smaller than the interval between winding section.So, the width that at least part of polar arc face is disconnected in the circumferential significantly reduces, and while substantially not affecting motor impact, effectively reduces the noise of motor, the overall performance of lifting motor.
In addition, described polar arc face starts groove 36 position in correspondence, forms non-homogeneous air gap with rotor 12, starts the position of groove 36, form even air gap with rotor 12 in non-corresponding.Starting groove 36 in above-described embodiment is only formed on the first polar arc face 34, in certain embodiments, also startup groove can be formed on the second polar arc face 44, or on first, second polar arc face 34,44, form startup groove 36 simultaneously.Understandably, according to the different requirements in the startup direction to motor, can the corresponding drive circuit of matching design.In addition, arranging of described startup groove 36 can do corresponding change as required in length, the degree of depth, is not limited with concrete structure shown in the present embodiment.
In above-described embodiment, adopt single first polar arm 18 to match with single second polar arm 20 and form magnetic core 10, in other embodiments, both can also have other fit system: as shown in Figure 5, can be that single first polar arm 18 matches with two the second polar arms 20, the first polar arm 18 is folded between two second polar arms 20; Or as shown in Figure 6, also can be that single second polar arm 20 matches with two the first polar arms 18, the second polar arm 20 is folded between two first polar arms 18; Again or, can also be that multiple first polar arms 18 are alternately stacked with multiple second polar arm 20.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (14)
1. a stator core, the polar arm comprising end and stretched out by end, described polar arm comprises spaced two linking arms and is formed at the pole pawl of end of each linking arm respectively, space is formed for holding rotor in the pawl of described the two poles of the earth, described pole dog collar forms polar arc face around described space, and it is characterized in that, described polar arc face forms fracture in the circumferential, described fracture is just to the interval between linking arm, and described fracture is the vicissitudinous width of tool in the axial direction.
2. stator core as claimed in claim 1, it is characterized in that, described fracture has the first width and the second width, and the width at the interval between described first width and linking arm is suitable, and described second width is less than described first width.
3. stator core as claimed in claim 1, it is characterized in that, described polar arm comprises the first polar arm and the second polar arm that are stacked vertically, described first polar arm comprises two first pole pawls, described two first pole pawl spaced formation first opening, described second polar arm comprises two second pole pawls, and described two second pole pawl spaced formation second opening, described first opening and the second opening form described fracture jointly.
4. stator core as claimed in claim 3, it is characterized in that, described first opening aligns in the axial direction with the second opening, and the width of the second opening is less than the width of the first opening.
5. stator core as claimed in claim 3, it is characterized in that, the width between the width of described first opening and the first linking arm is suitable.
6. stator core as claimed in claim 3, it is characterized in that, each second pole pawl stretches out towards another the second pole pawl and is formed with wall portion, the second opening described in gap-forming between the wall portion that described two second pole pawls are corresponding.
7. stator core as claimed in claim 3, it is characterized in that, described second polar arm is two, and the first polar arm is one, and the first polar arm is folded between two second polar arms.
8. stator core as claimed in claim 3, it is characterized in that, described first polar arm is two, and the second polar arm is one, and the second polar arm is folded between two first polar arms.
9. stator core as claimed in claim 3, it is characterized in that, described first polar arm, the second polar arm are multiple, and the first polar arm and the second polar arm are alternately stacked vertically.
10. stator core as claimed in claim 3, is characterized in that, described end, the first polar arm, the second polar arm are connected by the stacking also machinery that forms of some thin slices respectively.
11. stator cores as claimed in claim 3, is characterized in that, described first polar arm and end one of them be formed with draw-in groove, wherein another is formed with fixture block; Described second polar arm and end one of them be formed with draw-in groove, wherein another is formed with fixture block; Described fixture block is arranged in respectively in corresponding draw-in groove and is connected in the first polar arm, the second polar arm and end.
12. stator cores as described in any one of claim 1-11, is characterized in that, described polar arc face indent forms two and starts grooves, and described startup groove departs from the central shaft of pole pawl.
13. 1 kinds of electric machine, comprise stator core, be wound in winding on stator core and can the p-m rotor that rotates of relative stator, it is characterized in that, described stator core is the stator core described in any one of claim 1-12, described rotor is arranged at the space in the pawl of the two poles of the earth, and the pole dog collar rotor of described stator core also forms air gap with rotor.
14. electric machine as claimed in claim 13, is characterized in that, the width of the fracture that described polar arc face disconnects minimum widith in the circumferential or the second opening is less than 4 times of the width of the air gap between stator and rotor.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620032388.8U CN205647057U (en) | 2015-09-01 | 2015-09-01 | Single -Phase permanent -Magnet motor and stator core thereof |
| CN201520674767.2U CN205231871U (en) | 2015-09-01 | 2015-09-01 | Single -Phase permanent -Magnet motor and stator core thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520674767.2U CN205231871U (en) | 2015-09-01 | 2015-09-01 | Single -Phase permanent -Magnet motor and stator core thereof |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620032388.8U Division CN205647057U (en) | 2015-09-01 | 2015-09-01 | Single -Phase permanent -Magnet motor and stator core thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205231871U true CN205231871U (en) | 2016-05-11 |
Family
ID=55906914
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520674767.2U Expired - Fee Related CN205231871U (en) | 2015-09-01 | 2015-09-01 | Single -Phase permanent -Magnet motor and stator core thereof |
| CN201620032388.8U Expired - Fee Related CN205647057U (en) | 2015-09-01 | 2015-09-01 | Single -Phase permanent -Magnet motor and stator core thereof |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620032388.8U Expired - Fee Related CN205647057U (en) | 2015-09-01 | 2015-09-01 | Single -Phase permanent -Magnet motor and stator core thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN205231871U (en) |
-
2015
- 2015-09-01 CN CN201520674767.2U patent/CN205231871U/en not_active Expired - Fee Related
- 2015-09-01 CN CN201620032388.8U patent/CN205647057U/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN205647057U (en) | 2016-10-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160511 |