CN100433509C - Small power cage type induction motor - Google Patents
Small power cage type induction motor Download PDFInfo
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- CN100433509C CN100433509C CNB2006101223962A CN200610122396A CN100433509C CN 100433509 C CN100433509 C CN 100433509C CN B2006101223962 A CNB2006101223962 A CN B2006101223962A CN 200610122396 A CN200610122396 A CN 200610122396A CN 100433509 C CN100433509 C CN 100433509C
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Abstract
This invention relates to a small power cage induced motor including a shaft, a rotor, a stator, an end cover and a base, in which, said rotor includes a rotor iron core and internal fan vanes extending outside axially from the end part, said stator includes a stator core and a winding, the end of which surrounds the vanes of the internal fan characterizing that the axial outer end of the vane is connected to a turning side surrounding said shaft.
Description
Technical field
The present invention relates to a kind of small power cage type induction motor, its cooling structure especially, in International Patent Classification (IPC), classification belongs to H02K9/06.
Background technology
Cage induction motor is with a long history.Visible " design of electrical motor " (the old generation of Xi'an Communications University is female, China Machine Press nineteen eighty-two Beijing the 1st edition) of traditional design closed or the middle-size and small-size cage induction motor of protection, its typical structure is seen Fig. 8-3 and Fig. 8-4 in this book P164～165.The air cooling system of this design is applied to product, especially is directly used in small power motor, and it is desirable that cooling effect is owed, and when the motor winding temperature rise is higher, can only revise Electromagnetic Design, so that increase more material cost.
The term that the present invention relates to is also shown in standard GB/T 2900.25-94 " electrotechnical terminology electric rotating machine "
Summary of the invention
Technical problem to be solved by this invention is, proposes a kind of small power cage type induction motor, and its cooling system can be than the obvious reduction motor of traditional structure winding temperature rise, and revises a little on the basis of traditional design easily and realize that required cost is lower.
The technical scheme that the present invention solve the technical problem is that a kind of small power cage type induction motor comprises rotating shaft, rotor, stator, end cap and support; Described rotor comprises the internal fan blade that rotor core and end thereof are overhanging vertically; Described stator comprises stator core and stator winding, and stator winding end is around described rotor internal fan blade; It is characterized in that the axial outer end of described internal fan blade is connected in the surface of revolution around described rotating shaft.
Temperature rise is higher so that the stator winding end radiating condition is relatively poor usually for the traditional structure small power cage type induction motor.Though its cast aluminium cage-type rotor majority has the internal fan of the blade formation of stretching out vertically from conducting ring (claiming end ring again), but it mainly acts on is air acceleration cycle in the mixer, so as better with support and end cap (to closed) or outside (to protection) heat-shift.Though the blade adjacent stator winding overhang of described internal fan lacks suitable runner, the air that stirs during its a rotation only part brushes stator winding end, and is especially when being subjected to the restriction of size and rotating speed, not strong to its cooling effect.
The design is on the basis of traditional structure, axial outer end in described internal fan blade increases by the surface of revolution around described rotating shaft dexterously, this surface of revolution connects sealing to the axial outer end of each blade and is at interval pipeline one by one, it is shroud or hub disk with rotor end-face (containing conducting ring) and this surface of revolution respectively that the result transform the internal fan of former stirring-type as, with fan blade is that exhaust outlet (is suitable for inner rotor motor towards the face of cylinder of stator winding end, the outside diameter of fan blade is met the internal side diameter to stator winding end) or inlet scoop (suitable external rotor, the internal side diameter of fan blade is met the outside diameter to stator winding end) centrifugal fan, improve air efficient greatly, and make all circulating currents pass through stator winding end, thereby significantly strengthen cooling to the end.The raising of air efficient also strengthens the cooling of the heat that fan blade is spread out of from internal rotor.Below all cause obviously reducing the motor winding temperature rise.Yet the surface of revolution structure that is increased is very simple, and cost is very low.
One of further design of the technical scheme that the present invention solve the technical problem is, described end cap and support constitute totally-enclosed to rotor and stator, and the described surface of revolution has the ventilation hole of twisted rotary shaft.This is the modular design that the present invention is directed to enclosed motor.The airflow route that this design forms,
---for inner rotor motor: the outside diameter of fan blade (centrifugal fan exhaust outlet)---stator winding end---end cap inner surface---ventilation hole of surface of revolution twisted rotary shaft (centrifugal fan the inlet scoop)---internal side diameter of fan blade---fan blade pipeline---outside diameter of fan blade;
---for outer rotor motor: the outside diameter of fan blade (centrifugal fan exhaust outlet)---end cap inner surface---the ventilation hole of the surface of revolution twisted rotary shaft---stator winding end---internal side diameter of fan blade (centrifugal fan inlet scoop)---fan blade pipeline---outside diameter of fan blade.
Described circulating current is taken heat out of from winding overhang, is skimming over the end cap inner surface or/and obtain cooling during the support inner surface then.Therefore, in the described end cap of preferred design or/and have radiating ribs in the support, to increase heat exchange area; And,, form before entering air inlet with air-guiding and can improve prewhirling of fan efficiency if the concentric circles that is shaped as described rotating shaft of described ventilation hole preferably designs the radiating ribs in the end cap on this concentrically ringed tangent line.
Two of the further design of the technical scheme that the present invention solve the technical problem is, the described surface of revolution has the ventilation hole of twisted rotary shaft, described end cap has the ventilation hole of twisted rotary shaft, described rotor be internal rotor and support or/and end cap has the ventilation hole of adjacent stator winding overhang, perhaps described rotor is that external rotor and support are or/and end cap has the ventilation hole of contiguous described fan blade outside diameter.This is the modular design that the present invention is directed to open motor.The airflow route that this design forms,
---for inner rotor motor be: the machine outer air---the end cap twisted rotary shaft the ventilation hole---ventilation hole of surface of revolution twisted rotary shaft (centrifugal fan the inlet scoop)---internal side diameter of the fan blade---fan blade pipeline---outside diameter of fan blade (centrifugal fan exhaust outlet)---stator winding end---support is or/and ventilation hole of end cap adjacent stator winding overhang---machine outer air;
---for outer rotor motor be: the machine outer air---the end cap twisted rotary shaft ventilation hole---ventilation hole of surface of revolution twisted rotary shaft---stator winding end---internal side diameter of fan blade (centrifugal fan inlet scoop)---the fan blade pipeline---outside diameter of fan blade (centrifugal fan exhaust outlet) support or/and the outside diameter of the contiguous described fan blade of end cap ventilation hole---the machine outer air.The said flow route is the machine outer air of bringing in constant renewal in to the winding overhang cooling, and cooling effect is better.
At one of special design of open motor be, described rotor is an internal rotor, and only an end has described internal fan blade, and the surface of revolution that this internal fan sharf connects outward contacts with described rotating shaft is airtight; Do not have an end of described internal fan blade in rotor, one contacts with described rotating shaft is airtight around the described rotating shaft and the surface of revolution that axially hides stator winding end; Described support is or/and end cap has the ventilation hole of adjacent stator winding overhang, and rotor has axial ventilation hole.The airflow route that this design forms is:
The machine outer air---support or/and end cap in the air vent of an end adjacent stator winding overhang that does not have described internal fan blade the---stator winding end that does not have an end of the described internal fan blade---rotor axial air vent---internal side diameter of the fan blade---fan blade pipeline---outside diameter of the fan blade---stator winding end with end of described internal fan blade---support or/and end cap in the air vent of the end adjacent stator winding overhang with described internal fan blade---machine outer air.
At two of the special design of open motor be, described rotor is an external rotor, and only an end has described internal fan blade, and the surface of revolution that this internal fan sharf connects outward contacts with described rotating shaft is airtight; Do not have an end of described internal fan blade in rotor, one contacts with described rotating shaft is airtight around the described rotating shaft and the surface of revolution that axially hides stator winding end; Described support is or/and end cap has the ventilation hole of contiguous described fan blade outside diameter or rotor tip, and stator has axial ventilation hole.The airflow route that this design forms is:
The machine outer air---support or/and end cap in the air vent of an end adjacent rotor end that does not have described internal fan blade---in the stator winding end that does not have described internal fan blade one end---the stator shaft orientation air vent---in the stator winding end of the end with described internal fan blade---internal side diameter of fan blade---the fan blade pipeline---outside diameter of fan blade---support or/and end cap in the contiguous described fan blade outside diameter of the end with described internal fan blade air vent---the machine outer air.
More than special design only drive cooling blast by the centrifugal fan structure of an end, can save structure and strengthen the cooling of internal rotor by axial ventilation hole.
For above all designs, further design is that the described surface of revolution radially extends, and hides stator winding end in axial direction, and preferably after this further extends to described stator core direction.This design increases the brush area of air-flow to winding overhang, further improves cooling effect.
Technical solution of the present invention and modular design thereof will further specify in embodiment.
Description of drawings
The following drawings is used to illustrate the specific embodiment of the present invention.
Fig. 1 is traditional closed middle-size and small-size cage induction motor structural representation;
Fig. 2 is the present invention's the 1st embodiment electric motor structure schematic diagram;
Fig. 3 is the present invention's the 2nd embodiment electric motor structure schematic diagram;
Fig. 4 is the present invention's the 3rd embodiment electric motor structure schematic diagram.
Embodiment
Embodiment of the invention motor can improve on the traditional design basis of national sector standard Y series or A02, B02, C02 and D02 series motor and form, the structure of closed middle-size and small-size cage induction motor shown in Fig. 8-3 is seen Fig. 1 in " design of electrical motor " as stated in the Background Art, comprising:
---rotating shaft 1, rotor 2, stator 3, end cap 4, support 5, external fan 60 and fan housing 70;
---rotor 2 comprises the cage modle winding of rotor core 6 and cast aluminium, and the cage modle winding comprises conducting ring 7 and overhanging vertically internal fan blade 8 thereof;
---stator 3 comprises stator core 9 and stator winding;
---the end 10 of stator winding radially surrounds rotor internal fan blade 8.
The structural representation of the present invention's the 1st embodiment motor as shown in Figure 2.This motor is closed middle-size and small-size cage induction motor as shown in Figure 1 to be revised design, and the structure of being continued to use comprises:
---rotating shaft 1, rotor 2, stator 3 and support 5;
---rotor 2 comprises the cage modle winding of rotor core 6 and cast aluminium, and the cage modle winding comprises conducting ring 7 and overhanging vertically internal fan blade 8 thereof;
---stator 3 comprises stator core 9 and stator winding;
---the end 10 of stator winding radially surrounds rotor internal fan blade 8.
Change In Design comprises:
---each sharf of internal fan blade 8 tight fit outward embeds in the groove of offering with the circular ring plate 11 of the twisted rotary shaft 1 of engineering plastics manufacturing or hole with corresponding distribution and shape, circular ring plate 11 has the circular ventilation hole 12 of twisted rotary shaft 1 and radially extends, and axially hides stator winding end 10;
---end cap 14 inside and outside surfaces are all in same cross section (seeing front view) protruding radiating ribs 15, and the trend of muscle and the tangent line of ventilation hole 12 cylindricals parallel (seeing left view);
---because cooling effect improves the external fan of traditional design and fan housing cancellation.
This design forms by internal fan blade 8 and be shroud and end face (containing conducting ring 7) with rotor 2 is the impeller of hub disk formation with circular ring plate 11, and be air inlet and internal fan blade 8 towards the opening of stator winding end with ventilation hole 12 is the centrifugal fan structure of exhaust outlet.The airflow route of its driving is:
The structure of the present invention's the 2nd embodiment motor as shown in Figure 3.This motor also is closed middle-size and small-size cage induction motor as shown in Figure 1 to be revised design, and the structure of being continued to use comprises:
---rotating shaft 1, rotor 2 and stator 3;
---rotor 2 comprises the cage modle winding of rotor core 6 and cast aluminium, and the cage modle winding comprises conducting ring 7 and overhanging vertically internal fan blade 8 thereof;
---stator 3 comprises stator core 9 and stator winding;
---the end 10 of stator winding radially surrounds rotor internal fan blade 8.
Change In Design comprises:
---the axial outer end of internal fan blade 8 also connects the dome 111 of a twisted rotary shaft 1 as embodiment 1, dome 111 also has as the circular ventilation hole 12 of the twisted rotary shaft 1 of embodiment 1 and radially extends, but after stator winding end 10 axially hidden is that bending extends axially to stator core 9, stator winding end 10 is radially hidden, cover stator winding end 10 as result such as the cap;
---support 105 is in adjacent stator winding overhang 10 places, and promptly fixedly the strip ventilation hole 13 of 6～8 symmetrical distributions is offered in the interior lateral section of the ring flange of end cap 114;
---end cap 114 is offered the ring strip ventilation hole 115 of 6～8 symmetrical distributions in the bearing chamber periphery;
---because support 105 and end cap 114 are offered ventilation hole, motor is by the closed open type that becomes, and cooling effect improves in the machine, and the external fan of traditional design enclosed motor and fan housing are also as embodiment 1 cancellation.
This design also forms the centrifugal fan structure of similar embodiment 1, and the airflow route that drives is:
Machine outer air---ventilation hole 115---ventilation hole 12---fan blade 8 internal side diameters---fan blade 8 outside diameters---stator winding end 10---ventilation hole 13---machine outer air.
The structural representation of the present invention's the 3rd embodiment motor as shown in Figure 4.This motor also is closed middle-size and small-size cage induction motor as shown in Figure 1 to be revised design, and the structure of being continued to use comprises:
---rotating shaft 1, stator 3 and end cap 4;
---stator 3 comprises stator core 9 and stator winding;
Change In Design comprises:
---rotor 202 comprises the cage modle winding of rotor core 206 and cast aluminium, and rotor core 206 has axial ventilation hole 207; The cage modle winding comprises conducting ring 7, but only an end has internal fan blade 88 overhanging vertically and that radially surrounded by stator winding end 10; The axial outer end of internal fan blade 88 also connects a twisted rotary shaft 1 as embodiment 2 and covers the dome 211 of stator winding end 10, but dome 211 is not established ventilation hole, but allows rotating shaft 1 slide hermetically to pass or connect; Do not have an end of described internal fan blade in rotor 202, a twisted rotary shaft 1 is also arranged and cover the dome 212 of stator winding end 10, allow rotating shaft 1 connect hermetically;
---support 105 also as embodiment 2 in adjacent stator winding overhang 10 places, promptly fixedly in the ring flange of end cap 4 lateral section offer the strip ventilation hole 13 of 6～8 symmetrical distributions;
---rotor 202 has axial ventilation hole 203;
---because cooling effect improves, the external fan of traditional design and fan housing are also as embodiment 2 cancellations.
This design forms by the internal fan blade 8 of rotor 202 1 ends and be shroud and be the impeller of hub disk formation with circular ring plate 211 with the end face (containing conducting ring 7) of rotor 202, and be air inlet and internal fan blade 8 towards the opening of stator winding end with the axial ventilation hole 203 of rotor 202 is the centrifugal fan of exhaust outlet.The airflow route of its driving is:
Machine outer air---ventilation hole 13---stator winding end 10---stator shaft orientation ventilation hole 203---fan blade 88 internal side diameters---fan blade 88 outside diameters---stator winding end 10---ventilation hole 13---machine outer air.
Above embodiment End cover for motor and support are separable structures, but for many electric household utensil motor, washing machine motor etc. for example, end cap and support are the housings that is enclosed within stator core two ends behind integrated casting or the sheet metal stretch forming, radially or axially leave described ventilation hole at housing.
Above embodiment can also use prior art that further design is arranged, for example:
---internal fan blade 8 can be according to the knowledge and the experiment of fluid mechanics and fan impeller, the better blade quantity of design effect, highly, width and inclination angle etc.; And can select more suitably mechanical realization, technology and material to its structure that connects annulus;
---each ventilation hole can be according to the knowledge and the experiment of fluid mechanics and ventilation blower, the size and dimension that design effect is better;
Above embodiment all is at inner rotor motor.For as ceiling fan one class outer rotor motor, its structure visible " Fig. 7-15 and explanation thereof in the small power motor application technology handbook (Pang Qihuai, China Machine Press nineteen ninety Beijing the 1st edition).This type of motor can be implemented Change In Design according to the design that the present invention is directed to outer rotor motor.
Claims (10)
1, a kind of small power cage type induction motor comprises rotating shaft, rotor, stator, end cap and support; Described rotor comprises the internal fan blade that rotor core and end thereof are overhanging vertically; Described stator comprises stator core and stator winding, and stator winding end is around described rotor internal fan blade; It is characterized in that the axial outer end of described internal fan blade is connected in the surface of revolution around described rotating shaft.
2, according to the described motor of claim 1, it is characterized in that: described end cap and support are totally-enclosed to rotor and stator formation, and the described surface of revolution has the ventilation hole of twisted rotary shaft.
3, according to the described motor of claim 2, it is characterized in that: described end cap is interior or/and have radiating ribs in the support.
4, according to the described motor of claim 3, it is characterized in that: the radiating ribs in the concentric circles that is shaped as described rotating shaft of described ventilation hole, described end cap is on this concentrically ringed tangent line.
5, according to the described motor of claim 1, it is characterized in that: the described surface of revolution has the ventilation hole of twisted rotary shaft, described end cap has the ventilation hole of twisted rotary shaft, and described rotor is an internal rotor, and described support is or/and end cap has the ventilation hole of adjacent stator winding overhang.
6, according to the described motor of claim 1, it is characterized in that: the described surface of revolution has the ventilation hole of twisted rotary shaft, described end cap has the ventilation hole of twisted rotary shaft, and described rotor is an external rotor, and described support is or/and end cap has the ventilation hole of contiguous described fan blade outside diameter.
7, according to the described motor of claim 1, it is characterized in that: described rotor is an internal rotor, and only an end has described internal fan blade, and the surface of revolution that this internal fan sharf connects outward contacts with described rotating shaft is airtight; Do not have an end of described internal fan blade in rotor, one contacts with described rotating shaft is airtight around the described rotating shaft and the surface of revolution that axially hides stator winding end; Described support is or/and end cap has the ventilation hole of adjacent stator winding overhang, and rotor has axial ventilation hole.
8, according to the described motor of claim 1, it is characterized in that: described rotor is an external rotor, and only an end has described internal fan blade, and the surface of revolution that this internal fan sharf connects outward contacts with described rotating shaft is airtight; Do not have an end of described internal fan blade in rotor, one contacts with described rotating shaft is airtight around the described rotating shaft and the surface of revolution that axially hides stator winding end; Described support is or/and end cap has the ventilation hole of the outside diameter of contiguous described fan blade or rotor, and stator has axial ventilation hole.
9, according to each described motor in the claim 1 to 8, it is characterized in that: the described surface of revolution radially extends, and axially hides stator winding end.
10, according to the described motor of claim 9, it is characterized in that: the described surface of revolution extends to described stator core direction after axially hiding stator winding end, hides stator winding end in radial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101223962A CN100433509C (en) | 2006-09-22 | 2006-09-22 | Small power cage type induction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101223962A CN100433509C (en) | 2006-09-22 | 2006-09-22 | Small power cage type induction motor |
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| Publication Number | Publication Date |
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| CN1945935A CN1945935A (en) | 2007-04-11 |
| CN100433509C true CN100433509C (en) | 2008-11-12 |
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| CNB2006101223962A Expired - Fee Related CN100433509C (en) | 2006-09-22 | 2006-09-22 | Small power cage type induction motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4145677A1 (en) * | 2021-09-06 | 2023-03-08 | MAHLE International GmbH | Electric machine |
| EP4145678A1 (en) * | 2021-09-06 | 2023-03-08 | MAHLE International GmbH | Electric machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102130540B (en) * | 2011-03-11 | 2012-07-25 | 华小平 | Ventilating heat-radiation structure of direct-drive permanent-magnet wind-driven generator |
| CN102324804A (en) * | 2011-09-19 | 2012-01-18 | 浙江凯利达防爆机电有限公司 | Heat dissipation explosion-proof motor |
| CN106738323A (en) * | 2017-02-21 | 2017-05-31 | 王宏保 | Portable mixed mud mixer |
| CN106877576B (en) * | 2017-04-17 | 2019-06-18 | 汉宇集团股份有限公司 | A kind of totally enclosed motor |
| CN106877577B (en) * | 2017-04-18 | 2019-06-18 | 汉宇集团股份有限公司 | A kind of axis stretches the totally enclosed motor of tipping impeller |
| JP2019054650A (en) * | 2017-09-15 | 2019-04-04 | 東芝三菱電機産業システム株式会社 | Totally-closed fan-cooled dynamo-electric machine |
| CN112713695B (en) * | 2020-12-21 | 2022-08-09 | 中车永济电机有限公司 | Cooling fan motor for locomotive |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH053643A (en) * | 1991-06-27 | 1993-01-08 | Fuji Electric Co Ltd | Full-enclosed fan-closed rotary electric machine |
| JPH0946971A (en) * | 1995-07-24 | 1997-02-14 | Toyo Electric Mfg Co Ltd | Fully sealed main motor for vehicle |
| JP2000324758A (en) * | 1999-05-17 | 2000-11-24 | Mitsubishi Electric Corp | Motor for vehicle drive |
-
2006
- 2006-09-22 CN CNB2006101223962A patent/CN100433509C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH053643A (en) * | 1991-06-27 | 1993-01-08 | Fuji Electric Co Ltd | Full-enclosed fan-closed rotary electric machine |
| JPH0946971A (en) * | 1995-07-24 | 1997-02-14 | Toyo Electric Mfg Co Ltd | Fully sealed main motor for vehicle |
| JP2000324758A (en) * | 1999-05-17 | 2000-11-24 | Mitsubishi Electric Corp | Motor for vehicle drive |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4145677A1 (en) * | 2021-09-06 | 2023-03-08 | MAHLE International GmbH | Electric machine |
| EP4145678A1 (en) * | 2021-09-06 | 2023-03-08 | MAHLE International GmbH | Electric machine |
| WO2023030909A1 (en) * | 2021-09-06 | 2023-03-09 | Mahle International Gmbh | Electric machine |
| WO2023030910A1 (en) * | 2021-09-06 | 2023-03-09 | Mahle International Gmbh | Electric machine |
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| CN1945935A (en) | 2007-04-11 |
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Granted publication date: 20081112 Termination date: 20110922 |