CN112910138A - Fan motor - Google Patents
Fan motor Download PDFInfo
- Publication number
- CN112910138A CN112910138A CN202110319804.8A CN202110319804A CN112910138A CN 112910138 A CN112910138 A CN 112910138A CN 202110319804 A CN202110319804 A CN 202110319804A CN 112910138 A CN112910138 A CN 112910138A
- Authority
- CN
- China
- Prior art keywords
- motor
- outer rotor
- motor cover
- permanent magnet
- fan motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2786—Outer rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a fan motor, which comprises an outer rotor and a motor cover, wherein an inner stator is arranged in the outer rotor, a motor shaft penetrating through the motor cover is connected with the inner stator, a retainer is fixed at the inner side of the outer rotor, a plurality of positioning columns are arranged on the periphery of the retainer, permanent magnets are embedded between the positioning columns, the motor cover is integrally formed by metal, a step-shaped boss is arranged on the motor cover and correspondingly matched with an opening of the outer rotor, the inner diameter of the outer rotor is 60-90mm, and the height of the outer rotor is 30-80 mm; the outer diameter of the inner stator is 50-85mm, the height of the inner stator is 5-40mm, an iron core of the stator is provided with 12 slots for installing coil windings, the number of turns of the coil windings is 65-350, the coil wire diameter of the coil windings is 0.31-0.6mm, the height of the permanent magnet is 16-27mm, and the thickness of the permanent magnet is 2.5-5 mm. The fan motor structure can greatly improve the production efficiency and the yield of products, so that the motor structure has good heat dissipation performance, and the motor efficiency can reach more than 70%.
Description
Technical Field
The invention relates to a motor, in particular to a fan motor.
Background
A conventional fan motor includes an inner stator having a motor coil thereon, and an outer rotor having a plurality of permanent magnets fixed therein, and a motor shaft connected to the inner stator. In prior art, the permanent magnet in the outer rotor generally adopts sticky mode to come the staff installation fixed, is difficult to guarantee the accuracy of permanent magnet position, and long-term the use can appear the permanent magnet and drop and lead to motor trouble, and the sticky mode of fixed permanent magnet has restricted production efficiency greatly moreover, leads to product production efficiency, yields not high. On the other hand, the heat generated by the work of the existing fan motor is large, and the common motor structure is difficult to rapidly dissipate heat, so that the motor is easy to overheat during work. In addition, the existing fan motor has large power loss inside the motor due to the structure, and high efficiency is difficult to achieve.
Disclosure of Invention
The invention aims to provide a fan motor, which aims to effectively improve the production efficiency and the yield of products, has a good heat dissipation effect and obviously improves the motor efficiency.
In order to solve the technical problem, the fan motor comprises an outer rotor and a motor cover, wherein an inner stator is arranged in the outer rotor, a motor shaft penetrating through the motor cover is connected with the inner stator, a retainer is fixed on the inner side of the outer rotor, a plurality of positioning columns are circumferentially arranged on the retainer, permanent magnets are embedded between the positioning columns, the motor cover is integrally formed by metal, a step-shaped boss is arranged on the motor cover and correspondingly matched with an opening of the outer rotor, the inner diameter of the outer rotor is 60-90mm, and the height of the outer rotor is 30-80 mm; the outer diameter of the inner stator is 50-85mm, the height of the inner stator is 5-40mm, an iron core of the stator is provided with 12 slots for installing coil windings, the number of turns of the coil windings is 65-350, the coil wire diameter of the coil windings is 0.31-0.6mm, the height of the permanent magnet is 16-27mm, and the thickness of the permanent magnet is 2.5-5 mm. In order to improve the motor efficiency, it is necessary to reduce the loss when current flows through the winding and to control the loss of the core of the stator. The increase in motor efficiency is closely related to material consumption. In order to achieve the required energy consumption level, the volume of the copper coil of the coil winding and the stator core is inevitably increased. However, the reduction of the power loss of the motor is not always positively correlated with the increase of the consumption of copper and iron. When the cross section of the iron core and the coil is increased to a certain extent, the loss is increased on the contrary because the loss of the iron core and the coil is increased by the volume increasing part of the iron core. If the size exceeds a specific size, the motor efficiency is rather reduced due to a reduction in resistance and a reduction in iron core unsaturation. Therefore, there is a specific structural size in the motor design, beyond which the losses actually increase when the core volume is increased.
The opposite side surfaces of the positioning columns are provided with grooves, and the two side edges of the permanent magnet are correspondingly inserted into the grooves, so that the permanent magnet is positioned more accurately and fixed more reliably and cannot fall off.
The motor cover is characterized in that a first cavity is formed in the middle of the motor cover, a second cavity is formed in the middle of the outer rotor, and a first bearing and a second bearing which are connected with the motor shaft are respectively installed in the first cavity and the second cavity, so that the two bearings are well positioned, and the motor shaft is prevented from shaking.
The outer rotor is provided with a plurality of connecting support lugs, and the connecting support lugs are provided with connecting holes for being connected with the motor cover, so that the motor cover and the outer rotor can be conveniently connected and installed.
The outer edge of the motor cover is provided with a covered edge which surrounds the connecting support lug, so that the installation position of the motor cover is further limited, and the structure of a product is more stable.
A plurality of positioning concave holes are formed in the outer side of the wrapping edge to facilitate connection and positioning of the motor and other components of the fan.
The permanent magnet is neodymium iron boron alloy or ferrite, so that the permanent magnet has better ferromagnetism, and the performance of the motor is improved.
The invention has the beneficial effects that: in the fan motor structure, the inner side of the outer rotor is fixed with the retainer, the retainer is circumferentially provided with the positioning columns, and the permanent magnet is embedded between the positioning columns, so that the mounting position of the permanent magnet is more accurate, the permanent magnet is prevented from falling off, and the production efficiency and the yield of products can be greatly improved. Moreover, the motor cover is integrally formed by metal, so that the motor structure has good heat dissipation performance, the working temperature of the motor is prevented from being too high, and the running noise of the motor is reduced; the motor cover is matched with the outer rotor through the step-shaped boss, so that the installation position of the motor cover is more accurate, and the motor cover is effectively prevented from deviating from the central shaft to influence the operation of the motor; through the specific structure setting of the outer rotor and the inner stator in the technical scheme, various power losses in the motor are greatly reduced, and the motor efficiency can reach more than 70%.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of an exploded structure of the present invention;
fig. 3 is a schematic cross-sectional structure of the present invention.
Detailed Description
Referring to fig. 1 to 3, the fan motor of the present invention includes an outer rotor 1 and a motor cover 2, an inner stator 3 is disposed in the outer rotor 1, a motor shaft 4 penetrating through the motor cover 2 is connected to the inner stator 3, a holder 5 is fixed on the inner side of the outer rotor 1, a plurality of positioning posts 51 are circumferentially disposed on the holder 5, a permanent magnet 6 is embedded between the positioning posts 51, the motor cover 2 is integrally formed of aluminum, a step-shaped boss 21 is disposed on the motor cover 2, and the step-shaped boss 21 is correspondingly matched with an opening of the outer rotor 1.
As a first embodiment of the present invention, the permanent magnet is a neodymium iron boron alloy. The inner diameter of the outer rotor is 77.4mm, and the height of the outer rotor is 16 mm; the outer diameter of the inner stator is 76mm, and the height of the inner stator is 14 mm; the iron core of stator has 12 trench that are used for installing coil winding, coil winding's coil number of turns is 65, and coil winding's coil line footpath is 0.6mm, and the permanent magnet height is 16mm, and permanent magnet thickness is 2.5mm, can realize the motor function as follows:
the opposite side surfaces of the positioning columns 51 are provided with grooves 52, and two side edges of the permanent magnet 6 are correspondingly inserted into the grooves 52. A first cavity 22 is formed in the middle of the motor cover 2, a second cavity 11 is formed in the middle of the outer rotor 1, and a first bearing 7 and a second bearing 8 which are connected with the motor shaft 4 are respectively installed in the first cavity 22 and the second cavity 11.
A plurality of connecting lugs 12 are arranged on the outer rotor 1, and connecting holes 13 for connecting with the motor cover 2 are arranged on the connecting lugs 12. The outer edge of the motor cover 2 is provided with a covered edge 23 which surrounds the connecting lug 12. A plurality of positioning concave holes 24 are arranged on the outer side of the edge cover 23,
as a second embodiment of the present invention, the permanent magnet is ferrite. The inner diameter of the outer rotor is 76.8mm, and the height of the outer rotor is 27 mm; the outer diameter of the inner stator is 76mm, and the height of the inner stator is 25 mm; the iron core of stator has 12 trench that are used for installing coil winding, coil winding's coil number of turns is 350, and coil winding's coil line footpath is 0.31, and the permanent magnet height is 27mm, and permanent magnet thickness is 5mm, can realize the motor function as follows:
the above is only a preferred embodiment of the present invention, and the technical solutions that achieve the objects of the present invention by basically the same means are all within the protection scope of the present invention.
Claims (7)
1. Fan motor, including external rotor and motor cover, be provided with the inner stator in the external rotor, the motor shaft that passes the motor cover is connected its characterized in that with the inner stator: a retainer is fixed on the inner side of the outer rotor, a plurality of positioning columns are arranged on the periphery of the retainer, permanent magnets are embedded between the positioning columns, the motor cover is integrally formed by metal and is provided with a step-shaped boss, the step-shaped boss is correspondingly matched with an opening of the outer rotor, the inner diameter of the outer rotor is 60-90mm, and the height of the outer rotor is 30-80 mm; the outer diameter of the inner stator is 50-85mm, and the height of the inner stator is 5-40 mm; the iron core of the stator is provided with 12 slots for installing coil windings, the number of coil turns of the coil windings is 65-350, and the coil wire diameter of the coil windings is 0.31-0.6 mm; the height of the permanent magnet is 16-27mm, and the thickness of the permanent magnet is 2.5-5 mm.
2. The fan motor as claimed in claim 1, wherein: the opposite side surfaces of the positioning columns are provided with grooves, and two side edges of the permanent magnet are correspondingly inserted into the grooves.
3. The fan motor of claim 2, wherein: the motor cover is characterized in that a first cavity is arranged in the middle of the motor cover, a second cavity is arranged in the middle of the outer rotor, and a first bearing and a second bearing which are connected with the motor shaft are respectively installed in the first cavity and the second cavity.
4. The fan motor of claim 3, wherein: the outer rotor is provided with a plurality of connecting lugs, and the connecting lugs are provided with connecting holes used for being connected with the motor cover.
5. The fan motor of claim 4, wherein: the outer edge of the motor cover is provided with a covered edge which surrounds the connecting support lug.
6. The fan motor of claim 5, wherein: and a plurality of positioning concave holes are formed in the outer side of the wrapping edge.
7. The fan motor as claimed in claim 1, wherein: the permanent magnet is neodymium iron boron alloy or ferrite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110319804.8A CN112910138A (en) | 2021-03-25 | 2021-03-25 | Fan motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110319804.8A CN112910138A (en) | 2021-03-25 | 2021-03-25 | Fan motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112910138A true CN112910138A (en) | 2021-06-04 |
Family
ID=76106440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110319804.8A Pending CN112910138A (en) | 2021-03-25 | 2021-03-25 | Fan motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112910138A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116094217A (en) * | 2022-09-30 | 2023-05-09 | 广东肇庆德通有限公司 | Commercial large ceiling fan of outer rotor permanent magnet synchronous motor |
-
2021
- 2021-03-25 CN CN202110319804.8A patent/CN112910138A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116094217A (en) * | 2022-09-30 | 2023-05-09 | 广东肇庆德通有限公司 | Commercial large ceiling fan of outer rotor permanent magnet synchronous motor |
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