CN211629939U - Stator structure of external rotor motor - Google Patents
Stator structure of external rotor motor Download PDFInfo
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- CN211629939U CN211629939U CN202020176911.0U CN202020176911U CN211629939U CN 211629939 U CN211629939 U CN 211629939U CN 202020176911 U CN202020176911 U CN 202020176911U CN 211629939 U CN211629939 U CN 211629939U
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- external rotor
- electric machine
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- rotor electric
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Abstract
The utility model relates to an external rotor electric machine's stator structure, its characterized in that includes stator tooth, stator yoke and winding coil, and the stator tooth is connected with stator yoke detachable in the outside of stator yoke, stator tooth, the winding coil winding is on the stator tooth. The stator structure of this scheme of adoption, the winding rule is easy, does not harm the insulation, has improved the full rate of groove effectively, and stator tooth structure can form the semi-closed groove simultaneously, improves the air gap flux density wave form, reduces magnet steel eddy current loss.
Description
Technical Field
The utility model relates to an external rotor electric machine field, concretely relates to external rotor electric machine's stator structure.
Background
As shown in fig. 1, in the external rotor motor of the prior art, the stator core structure is generally a tooth-yoke integrated structure, and is limited by the slot opening on the integrated stator, so that the direct winding or wire insertion of the winding is difficult, the slot fullness rate is low, and the manufacturing cost is high. Meanwhile, the tooth-yoke integrated structure can cause the problems that the coil is difficult to coil when a concentrated winding type coil is used, insulation is easy to damage and the like. In the prior art, the formed coil is of an inverted trapezoidal structure, the upper side of the formed coil is wide, the lower side of the formed coil is narrow, and the tooth part of the integrated iron core is also wide at the upper side and narrow at the lower side of the formed coil. In the coil inserting process, the lower edge of the formed coil needs to be expanded to be wider than the width of the upper edge of the iron core tooth, then the formed coil is nested on the upper edge of the tooth, then the lower edge of the formed coil is loosened and pressed down until the formed coil is completely nested on the whole tooth, and the coil is easily damaged in the process of expanding the formed coil and nesting the formed coil on the tooth. In addition, an open slot is usually used during installation, which deteriorates the air gap flux density waveform and causes a large eddy current loss of the magnetic steel.
SUMMERY OF THE UTILITY MODEL
For solving above-mentioned technical problem, the coiling of the winding of being convenient for to improve the motor groove fullness rate, the utility model provides an external rotor electric machine's stator structure disassembles stator yoke portion and a plurality of stator tooth module with the stator, and a plurality of stator tooth module circumference equipartitions are in the peripheral part of stator yoke, all adopt mosaic structure to link together detachablely between all stator tooth modules and the stator yoke portion. The method comprises the following specific steps:
a stator structure of an outer rotor motor comprises stator teeth, a stator yoke and a winding coil, wherein a plurality of stator teeth are uniformly distributed on the periphery of the stator yoke in the circumferential direction, the stator teeth are detachably connected with the stator yoke, and the winding coil is wound on the stator teeth.
Furthermore, a plurality of positioning grooves are formed in the stator yoke, fixing heads are arranged at one ends of the stator teeth, and the fixing heads are matched with the positioning grooves in the stator yoke.
The widths of the top and the bottom of the cross section of the stator teeth can be equal or unequal, and in the structure with unequal widths, the width of the bottom close to the fixing head is smaller than the width of the top.
Further, the top of the stator teeth is provided with a pole shoe structure.
Preferably, the positioning groove is a dovetail groove, and the fixing head at one end of the stator tooth is in a corresponding matching shape.
Furthermore, the winding coil is an enameled wire multilayer winding or a flat copper wire winding.
Further, a hollow cooling medium duct is provided in the stator yoke.
The stator structure of this scheme of adoption has improved the groove fullness rate effectively, and the process that the shaping coil emboliaed the tooth is not influenced by the effect of expanding force and frictional force, convenient operation, and the rule is easy to it does not receive the damage to insulate. Meanwhile, the stator tooth structure can form a semi-closed slot, so that the air gap flux density waveform is improved, and the eddy current loss of the magnetic steel is reduced.
Drawings
Fig. 1 is a schematic view of a stator of an external rotor motor in the prior art.
Fig. 2 is a schematic structural diagram of the stator of the external rotor electric machine of the present invention.
Fig. 3 is an assembly diagram of the stator yoke and the stator teeth of the external rotor motor according to the present invention.
Integrated stator core 1, coil winding 2, pole shoe structure 31, fixing head 32, stator teeth 4 and positioning groove 41
Detailed Description
A stator structure of an outer rotor motor comprises stator teeth 3, a stator yoke 4 and a winding coil 2, wherein the plurality of stator teeth 3 are circumferentially and uniformly distributed on the periphery of the stator yoke 4, the stator teeth 3 are detachably connected with the stator yoke 4, and the winding coil is wound on the stator teeth 3.
Furthermore, a plurality of positioning grooves 41 are formed in the stator yoke 4, a fixing head 32 is arranged at one end of each stator tooth 3, and the fixing head 32 is matched with the positioning grooves 41 in the stator yoke 4.
The top width and the bottom width of the cross section of the stator teeth 3 may be equal or unequal, and in the structure with unequal widths, the bottom width close to the fixing head 32 should be smaller than the top width.
Further, the top of the stator teeth 3 is provided with a pole shoe structure 31.
Preferably, the positioning slot 41 is a dovetail slot, and the fixing head 32 at one end of the stator tooth 3 is correspondingly matched with the dovetail slot.
Further, the winding coil 2 is an enameled wire multilayer winding, and can also be a flat copper wire winding.
Further, a hollow cooling medium pipe is provided in the stator yoke 4.
The utility model discloses a process of stator structure's of external rotor electric machine rule does: firstly, the formed winding coil 2 is sleeved on the stator teeth 3, and then the formed winding coil 2 and the stator teeth 3 are integrally inserted into the stator assembly structure through the positioning groove 41 along the axial direction of the stator yoke 4.
Claims (9)
1. A stator structure of an outer rotor motor is characterized by comprising stator teeth, a stator yoke and a winding coil, wherein the plurality of stator teeth are uniformly distributed on the periphery of the stator yoke in the circumferential direction, the stator teeth are detachably connected with the stator yoke, and the winding coil is wound on the stator teeth.
2. The stator structure of an external rotor electric machine as claimed in claim 1, wherein said stator yoke has a plurality of positioning grooves formed therein, and one end of said stator teeth has a fixing head, said fixing head being engaged with the positioning grooves formed in the stator yoke.
3. The stator structure of an external rotor electric machine according to claim 2, wherein the positioning groove is a dovetail groove.
4. The stator structure of an external rotor electric machine as claimed in claim 1, wherein the top width and the bottom width of the cross section of the stator teeth are not equal, wherein the bottom width near the fixing head is smaller than the top width.
5. The stator structure of an external rotor electric machine as claimed in claim 1, wherein the width of the top and the width of the bottom of the cross section of the stator teeth are equal.
6. The stator structure of an external rotor electric machine as claimed in claim 1, wherein the top of the stator teeth is provided with a pole shoe structure.
7. The stator structure of an external rotor electric machine according to claim 1, wherein the winding coil is a multi-layer winding of enameled wire.
8. The stator structure of an external rotor electric machine according to claim 1, wherein the winding coil is a flat copper wire winding.
9. The stator structure of an external rotor electric machine according to claim 1, wherein a hollow cooling medium pipe is provided in the stator yoke.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020176911.0U CN211629939U (en) | 2020-02-17 | 2020-02-17 | Stator structure of external rotor motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020176911.0U CN211629939U (en) | 2020-02-17 | 2020-02-17 | Stator structure of external rotor motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211629939U true CN211629939U (en) | 2020-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020176911.0U Active CN211629939U (en) | 2020-02-17 | 2020-02-17 | Stator structure of external rotor motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211629939U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4277098A1 (en) * | 2022-05-14 | 2023-11-15 | Hamilton Sundstrand Corporation | Segmented rotors having rectangular wires and methods of manufacture therefor |
-
2020
- 2020-02-17 CN CN202020176911.0U patent/CN211629939U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4277098A1 (en) * | 2022-05-14 | 2023-11-15 | Hamilton Sundstrand Corporation | Segmented rotors having rectangular wires and methods of manufacture therefor |
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