CN2891454Y - Rotor structure of brushless motor with external rotor - Google Patents
Rotor structure of brushless motor with external rotor Download PDFInfo
- Publication number
- CN2891454Y CN2891454Y CN 200520013218 CN200520013218U CN2891454Y CN 2891454 Y CN2891454 Y CN 2891454Y CN 200520013218 CN200520013218 CN 200520013218 CN 200520013218 U CN200520013218 U CN 200520013218U CN 2891454 Y CN2891454 Y CN 2891454Y
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- China
- Prior art keywords
- magnet steel
- magnetic
- rotor
- brushless motor
- magnetic conductor
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Abstract
The utility model discloses a rotor structure of an outer-rotor electric motor without a brush, which comprises a hub embedded with a magnetizer and magnetic steels pasted on the hub, wherein the magnetic steels are connected with each other along the inner-circle of the magnetizer (the hub), a gap is between the work magnetic poles of the magnetic steels, thereby partial magnetic power-off caused by the connection of magnetic work poles of the magnetic steels is avoided and the effective passing-magnet of the working area is strengthened.
Description
Technical field
The utility model relates to brushless motor, refers in particular to a kind of rotor structure of outer-rotor brushless motor.
Background technology
At present, electric motor car is because advantage such as emission-free, safe, light is widely used, and as the motor of driving usefulness, adopts brushless motor usually.At present, outer-rotor brushless motor is the power developing direction of electric motor car.Its technical scheme is that the motor stator subassembly adopts and to have aluminium matter fuse and silicon steel punching and press and be embedded with the structure of winding after the one; Rotor part be by be embedded with magnetic conductor 21 ' wheel hub with attach thereon magnet steel 23 ' constitute (seeing shown in Figure 1).Magnet steel 23 ' be cuboid, pole orientation be itself and magnetic conductor 21 ' (wheel hub) adhesive surface 8 ' and corresponding surface 7 ', shown in Fig. 2,3.Magnet steel 23 ' paste installation formation N with magnetic conductor 21 ' (wheel hub)---the working rotor magnetic pole 24 of S---N---S '.The work magnetic pole embodies by magnetic conductor (wheel hub), as shown in Figure 4.
According to the electromagnetic theory analysis, present motor rotor structure exists defective as follows:
1, cuboid magnet steel 23 ' adjacent installation, make the work magnetic pole 24 of magnet steel ' contact, and cause the part magnet short-cut path, see among Fig. 4 B indication part in the A indication part and Fig. 5, cause the part magnetic line of force directly to run off, thereby reduced the effective flux of working region.
2, need to form by magnetic conductor 21 ' (wheel hub) the cuboid magnet steel 23 of work magnetic pole ', its adhesive surface 8 ' with magnetic conductor 21 ' (wheel hub) inner arc surface can not form face bonding and actual be the bonding formation of line gap 6 ', and then formation magnetic resistance is seen shown in Figure 4.Influenced two blocks of magnet steel by magnetic conductor (wheel hub) and the theory that forms in the magnetic flux density of 2 times of monomer magnet steel.
The utility model content
Be directed to the defective that technique scheme exists, the purpose of this utility model is to provide a kind of rotor structure of outer-rotor brushless motor, avoids the work magnetic pole of magnet steel to contact and causes the part magnet short-cut path, strengthens the effective flux of working region; Avoid magnet steel to engage and form gap generation magnetic resistance, improve the magnetic flux density of work magnetic pole with the rotor magnetic conductor.
For achieving the above object, the utility model is achieved through the following technical solutions:
A kind of outer-rotor brushless motor rotor structure, comprise the wheel hub and the attaching magnet steel thereon that are embedded with magnetic conductor, the magnet steel piecemeal links to each other along circle in the magnetic conductor (wheel hub) and forms, and it is characterized in that: have certain clearance between the work magnetic pole of described adjacent magnet steel.
Described magnet steel, the bonding end face of itself and magnetic conductor (wheel hub) have with magnetic conductor (wheel hub) in circle with the cambered surface of radius or close radius.
Be provided with non-magnetizer between the described adjacent magnet steel work magnetic pole.
Adopt the outer-rotor brushless motor rotor structure of said structure, one, between the work magnetic pole of adjacent magnet steel, be provided with certain clearance, or be provided with non-magnetizer and just can avoid the work magnetic pole of magnet steel to contact and cause the part magnet short-cut path, thereby can obtain the maximization of working region magnetic flux; They are two years old, magnet steel is set to the arc shape identical with its radius with the adhesive surface of magnetic conductor (wheel hub), makes its bonding formation face contact, has avoided forming the gap between magnet steel and the magnetic conductor (wheel hub), thereby reduce magnetic resistance, strengthen the magnetic flux density of magnet steel work magnetic pole.
Description of drawings
Fig. 1 is the rotor part structural representation of prior art outer-rotor brushless motor;
Fig. 2, be the magnet steel shape schematic diagram of prior art outer-rotor brushless motor;
Fig. 3 is the magnet steel schematic cross-section of prior art outer-rotor brushless motor;
Fig. 4 is the local enlarged diagram of the rotor structure of prior art outer-rotor brushless motor;
Fig. 5 is prior art external rotor brushless motor rotor and stator magnetic circuit schematic diagram;
Fig. 6 is the inner primary structure schematic diagram of brushless motor of the present utility model;
Fig. 7 is a C indication enlarged drawing among Fig. 6 of brushless motor of the present utility model inside;
Fig. 8 is the partial enlarged drawing of rotor of motor having no brush structure of the present utility model;
Fig. 9 is a brushless motor magnet steel schematic cross-section of the present utility model;
Figure 10 is second kind of schematic cross-section of brushless motor magnet steel of the present utility model;
Figure 11 is the third schematic cross-section of brushless motor magnet steel of the present utility model;
Figure 12 is the partial enlarged drawing of second kind of execution mode of rotor of motor having no brush structure of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described:
The inside primary structure of brushless motor of the present utility model is shown in Fig. 6,7, motor stator subassembly 1 adopts and has aluminium matter fuse 11 and silicon steel punching 12 and press and be embedded with the structure of winding after the one, rotor part 2 is to be made of wheel hub 22 that is embedded with magnetic conductor 21 and the magnet steel 23 that attaches thereon, and wherein magnet steel 23 piecemeals link to each other along circle in the magnetic conductor 21 (wheel hub).Magnet steel 23 is pasted to install with magnetic conductor 21 (wheel hub) and is constituted N---the working rotor magnetic pole 24 of S---N---S.
As shown in Figure 8, be the partial enlarged drawing of rotor structure, between the work magnetic pole 24 of adjacent magnet steel 23, be provided with certain clearance 3, just can avoid the work magnetic pole 24 of magnet steel 23 to contact and cause partial short circuit, thereby can obtain the maximization of magnetic flux.
The magnet steel of selecting for use every as shown in Figure 9 block-shaped, magnet steel work magnetic pole end face 4 width are less than the width of magnet steel and the bonding end face 5 of magnetic conductor, thus two adjacent installations of magnet steel can be so that have certain clearance between both work magnetic poles; On the other hand for avoiding forming between magnet steel and the magnetic conductor (wheel hub) gap, reduce magnetic resistance, strengthen the magnetic flux density of magnet steel work magnetic pole, to the improvement of magnet steel shape be the end face 5 that itself and magnetic conductor (wheel hub) is bonding be designed to magnetic conductor in justify cambered surface with radius.
Second kind of magnet steel selecting for use every as shown in figure 10 block-shaped, magnet steel work magnetic pole face width degree be less than the width of magnet steel and the bonding end face of magnetic conductor (wheel hub), and guarantee to make to have certain clearance between the work magnetic pole of adjacent magnet steel after the integral installation.
The third magnet steel shape of selecting for use can be as shown in figure 11, magnet steel work magnetic pole face width degree is less than the width of magnet steel and the bonding end face of magnetic conductor (wheel hub), can reach technique effect of the present utility model so that sticking to magnetic conductor (wheel hub) goes up between the work magnetic pole of adjacent magnet steel and have certain clearance equally.
Avoid the work magnetic pole of magnet steel to contact and cause the part magnet short-cut path, second kind of execution mode of motor rotor structure can be realized by following manner: as shown in figure 12, can utilize in the prior art employed cuboid magnetic links as shown in Figure 2, when magnet steel 23 is pasted installation along magnetic conductor 21 (wheel hub), between the work magnetic pole of adjacent magnet steel 23, be provided with non-magnetizer 7.Such mode can realize avoiding the work magnetic pole of magnet steel to contact and causes the part magnet short-cut path, obtains the maximization of magnetic flux.Also can select Fig. 9, Figure 10, difform magnet steel shown in Figure 11 in this structure for use.
Claims (3)
1, a kind of outer-rotor brushless motor rotor structure comprises the wheel hub and the attaching magnet steel thereon that are embedded with magnetic conductor, and the magnet steel piecemeal links to each other along the magnetic conductor inner ring and forms, and it is characterized in that: have certain clearance between the work magnetic pole of described adjacent magnet steel.
2, a kind of outer-rotor brushless motor rotor structure as claimed in claim 1 is characterized in that: described magnet steel, the bonding end face of itself and magnetic conductor have with magnetic conductor in the cambered surface of radius of circle or close radius.
3, a kind of outer-rotor brushless motor rotor structure as claimed in claim 1 is characterized in that: be provided with non-magnetizer between the work magnetic pole of described adjacent magnet steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520013218 CN2891454Y (en) | 2005-07-14 | 2005-07-14 | Rotor structure of brushless motor with external rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520013218 CN2891454Y (en) | 2005-07-14 | 2005-07-14 | Rotor structure of brushless motor with external rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2891454Y true CN2891454Y (en) | 2007-04-18 |
Family
ID=38022115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520013218 Expired - Fee Related CN2891454Y (en) | 2005-07-14 | 2005-07-14 | Rotor structure of brushless motor with external rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2891454Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102412693A (en) * | 2010-09-21 | 2012-04-11 | 台达电子工业股份有限公司 | Fan and motor thereof |
| CN102510143A (en) * | 2011-11-10 | 2012-06-20 | 田植华 | Permanent-magnet motor or permanent-magnet generator |
| TWI426681B (en) * | 2010-09-21 | 2014-02-11 | Delta Electronics Inc | Fan and motor thereof |
-
2005
- 2005-07-14 CN CN 200520013218 patent/CN2891454Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102412693A (en) * | 2010-09-21 | 2012-04-11 | 台达电子工业股份有限公司 | Fan and motor thereof |
| TWI426681B (en) * | 2010-09-21 | 2014-02-11 | Delta Electronics Inc | Fan and motor thereof |
| CN102412693B (en) * | 2010-09-21 | 2014-02-26 | 台达电子工业股份有限公司 | Fan and motor thereof |
| US9369017B2 (en) | 2010-09-21 | 2016-06-14 | Delta Electronics, Inc. | Fan and motor thereof |
| CN102510143A (en) * | 2011-11-10 | 2012-06-20 | 田植华 | Permanent-magnet motor or permanent-magnet generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |