CN202026222U - Novel permanent-magnet outer rotor motor - Google Patents
Novel permanent-magnet outer rotor motor Download PDFInfo
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- CN202026222U CN202026222U CN2011201440462U CN201120144046U CN202026222U CN 202026222 U CN202026222 U CN 202026222U CN 2011201440462 U CN2011201440462 U CN 2011201440462U CN 201120144046 U CN201120144046 U CN 201120144046U CN 202026222 U CN202026222 U CN 202026222U
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Abstract
The utility model belongs to the technical field of motors and particularly discloses a novel permanent-magnet outer rotor motor, which comprises a stator assembly and an external wheel-shell-type outer rotor. The stator assembly comprises a stator iron core and a stator coil wound on the stator iron core, the stator iron core is of a big/small groove structure, the big/small groove structure comprises big grooves and small grooves, the groove number of the small grooves is the same as that of the big grooves, the small grooves are correspondingly distributed at the tops of all teeth of the stator iron core, the ratio of the groove number of the big grooves to the pole number of the rotor is a fractional number, the big grooves are of a fractional groove design, and the ratio of the groove number of the big grooves to the pole number of the rotor stratifies the following formula: (2p+/-1)/3:2p, wherein the p refers to the pole pair number of the motor; and the total groove number of the stator iron core is (2p+/-1)/3*2. According to the outer rotor motor disclosed by the utility model, on the basis of maintaining higher processing property of the outer rotor motor, the advantages of reduced groove insulation materials for the motor, high winding coefficient and low harmonic content are achieved, the outer rotor motor is ensured to operate at high efficiency and can be widely applied to forward centrifugal fans and other electric appliances, and better usability of the outer rotor motor is ensured.
Description
Technical field
The utility model belongs to the motor product technical field.A kind of novel permanent magnetic external rotor synchronous machine is specifically disclosed.
Background technology
Existing permanent-magnetic outer rotor motor great majority are for concentrating winding configuration, and as shown in Figure 1, the permanent-magnetic outer rotor motor comprises stator 2 and rotor 1, the ratio of the groove number of described stator 2 and the number of poles of rotor 1 is 10: 9, for example, for typical 10 utmost point motors, stator 2 is the structure of 9 grooves.When motor operated in below 1000 rev/mins, the motor running frequency had only tens He Zhi, and electric efficiency is starkly lower than the efficient of motor when being higher than 1000 rev/mins, and it is best that motor operates in the interval efficient of 100HZ to 200HZ.
For example, when external rotor electric machine is applied to the forward-type centrifugal blower, exist the unfavorable problem of efficient in the application, and the main cause of this problem is that the motor running frequency is lower, have only tens hertz, and between the desirable running frequency 150-250 of the general permagnetic synchronous motor hertz, but because motor speed can not change, can only increase the paired permanent magnet number of poles of rotor, at the 1000 right rotating speeds that turn left, the number of poles of motor is greater than 20 utmost points, also must increase to more than 20 grooves by the groove number of traditional method for designing motor stator, make that like this motor integrated artistic is relatively poor, its winding coefficient is low.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of novel permanent magnetic external rotor electric machine is provided, and this external rotor electric machine is on the basis of keeping higher processing performance, and the slot liner material of motor reduces, and the winding coefficient height is guaranteed the motor high-efficiency operation.
In order to realize above-mentioned technical purpose, the utility model is realized by following technical scheme:
A kind of novel permanent magnetic external rotor electric machine described in the utility model, comprise stator module and place outside wheel shell-type external rotor, described stator module comprises stator core and the stator coil that is set around on the stator core, described stator core is big sulculus structure, this big sulculus structure comprises vat and sulculus, the groove number of described sulculus is identical with the groove number of vat, described sulculus is distributed in the top of each tooth of stator core accordingly, the groove number of described vat is the mark slot type design of mark with the ratio of the number of poles of rotor, the ratio of described vat groove number and rotor number of poles satisfies following formula: (2p ± 1)/3: 2p, wherein p is the motor number of pole-pairs, motor stator backward influence of magnetic field has been subdued in the setting of this sulculus widely, makes the every extremely every phase groove of motor count q=(2p ± 1)/6p=1/3 ± 1/6p.When p=13 (26 utmost point), q=26/27, harmonic constant are extremely low. In addition, total groove number of described stator core is (2p ± 1)/3*2.
As the further improvement of above-mentioned technology, the number of described vat is 3 odd-multiple, each vat flute profile unanimity, and become equidistant even distribution.
In the utility model, described sulculus is an arc groove, and its radian is approximately equal to 360/ (2p ± 1), and p is the motor number of pole-pairs.
Compared with prior art, the beneficial effects of the utility model are:
(1) in the utility model: described stator core is the mark slot type design of mark for the ratio of the groove number of the vat of this stator core and rotor number of poles, the ratio of described vat and rotor number of poles satisfies ((2p ± 1)/3): 2p, wherein p is the motor number of pole-pairs, motor can be realized the fit system of multipole few groove, like this, guaranteeing to keep on the basis that has higher processing performance now, the slot liner material of motor reduces, the winding coefficient height is guaranteed the motor high-efficiency operation.
(2) the top correspondence of each tooth of stator core is provided with a sulculus in the utility model, has subdued motor stator backward influence of magnetic field widely, makes the every extremely every phase groove of motor count q=(2p ± 1)/6p=1/3 ± 1/6p.When p=13 (26 utmost point), q=26/27, harmonic constant are extremely low.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in detail:
Fig. 1 is a permanent-magnetic outer rotor electric machine structure schematic diagram in the prior art;
Fig. 2 is a permanent-magnetic outer rotor electric machine structure schematic diagram in the utility model.
Embodiment
As shown in Figure 2, permanent-magnetic outer rotor motor described in the utility model, comprise stator module and place outside wheel shell-type external rotor 1, described stator module comprises stator core 2 and the stator coil 3 that is set around on the stator core 2, the groove number of the vat 21 that described stator core 2 is this stator core is the mark slot type design of mark with the ratio of the paired permanent magnet number of poles of rotor 1, the ratio of the number of poles of described vat 21 and rotor 1 satisfies ((2p ± 1)/3): 2p, wherein p is the motor number of pole-pairs, the top correspondence of described stator core 2 each tooth is provided with a sulculus 4, this sulculus 4 has been subdued motor stator backward influence of magnetic field widely, makes the every extremely every phase groove of motor count q=(2p ± 1)/6p=1/3 ± 1/6p.When p=13 (26 utmost point), q=26/27, harmonic constant are extremely low.
In the utility model, described vat 21 is 3 odd-multiple, and each vat 21 flute profile unanimity, and equidistant even distribution.In addition, the sulculus 22 of stator core 2 each tooth top portion is an arc groove, and its radian is approximately equal to 360/ (2p ± 1)
In the utility model, the groove number of vat 21 is 3: 8 with the ratio of motor pole number, 3: 10; 9: 26,9: 28; 15: 44; 15: 46 ..., wherein the groove number of vat 21 is odd-multiple of 3,3,9,15,21....., and motor pole number is: 3 times of vat number ± 1, motor pole number must be even numbers.
Shown in Figure 2 is exactly one is the motor of 26 utmost points, 9 grooves, and motor can realize that multipole few groove cooperates, and the slot liner material of motor reduces, the winding coefficient height; In addition, have sulculus 22 in the middle of each stator core 2 each tooth, subdued motor stator backward influence of magnetic field widely, make the every extremely every phase groove of motor count q=(2p ± 1)/6p=1/3 ± 1/6p.When p=13 (26 utmost point), q=26/27, harmonic constant are extremely low.When external rotor electric machine described in the utility model is applied to the forward-type centrifugal blower, between its running frequency 150-250 hertz, guarantee the motor high-efficiency operation effectively.
The utility model is not limited to above-mentioned execution mode, every various changes of the present utility model or modification are not broken away from spirit and scope of the present utility model, if these are changed and modification belongs within claim of the present utility model and the equivalent technologies model, then the utility model also means and comprises these changes and modification.
Claims (3)
1. novel permanent magnetic external rotor electric machine, comprise stator module and place outside wheel shell-type external rotor, described stator module comprises stator core and the stator coil that is set around on the stator core, it is characterized in that: described stator core is big sulculus structure, this big sulculus structure comprises vat and sulculus, the groove number of described sulculus is identical with the groove number of vat, described sulculus is distributed in the top of each tooth of stator core accordingly, the groove number of described vat is the mark slot type design of mark with the ratio of the number of poles of rotor, the ratio of described vat groove number and rotor number of poles satisfies following formula: (2p ± 1)/3: 2p, and wherein p is the motor number of pole-pairs; Total groove number of described stator core is (2p ± 1)/3*2.
2. novel permanent magnetic external rotor electric machine according to claim 1 is characterized in that: the number of described vat is 3 odd-multiple, each vat flute profile unanimity, and become equidistant even distribution.
3. novel permanent magnetic external rotor electric machine according to claim 1 and 2 is characterized in that: described sulculus is an arc groove, and its radian is approximately equal to 360/ (2p ± 1), and p is the motor number of pole-pairs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201440462U CN202026222U (en) | 2011-05-09 | 2011-05-09 | Novel permanent-magnet outer rotor motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201440462U CN202026222U (en) | 2011-05-09 | 2011-05-09 | Novel permanent-magnet outer rotor motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202026222U true CN202026222U (en) | 2011-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201440462U Expired - Lifetime CN202026222U (en) | 2011-05-09 | 2011-05-09 | Novel permanent-magnet outer rotor motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202026222U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170180A (en) * | 2011-05-09 | 2011-08-31 | 佛山市顺德区泛仕达机电有限公司 | Novel permanent magnet external rotor motor |
-
2011
- 2011-05-09 CN CN2011201440462U patent/CN202026222U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170180A (en) * | 2011-05-09 | 2011-08-31 | 佛山市顺德区泛仕达机电有限公司 | Novel permanent magnet external rotor motor |
| WO2012151818A1 (en) * | 2011-05-09 | 2012-11-15 | 佛山市顺德区泛仕达机电有限公司 | Permanent-magnet external rotor motor |
| CN102170180B (en) * | 2011-05-09 | 2013-01-23 | 佛山市顺德区泛仕达机电有限公司 | Novel permanent magnet external rotor motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111102 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |