CN201781395U - Direct current brushless motor stator and rotor device with low cogging torque - Google Patents
Direct current brushless motor stator and rotor device with low cogging torque Download PDFInfo
- Publication number
- CN201781395U CN201781395U CN2010201925577U CN201020192557U CN201781395U CN 201781395 U CN201781395 U CN 201781395U CN 2010201925577 U CN2010201925577 U CN 2010201925577U CN 201020192557 U CN201020192557 U CN 201020192557U CN 201781395 U CN201781395 U CN 201781395U
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- cogging torque
- magnetic pole
- brushless motor
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Abstract
The utility model discloses a direct current brushless motor stator and rotor device with a low cogging torque, which relates to the technical field of motors and consists of a stator iron core 1, stator magnetic poles 2, a magnetic shoe 3, a rotor shaft 4 and a rotor 5, wherein the middle part of the stator iron core 1 is provided with an inner hole for arranging the rotor, at least three tooth sockets are arranged around the inner hole, each tooth socket constitutes one stator magnetic pole 2, and the width of every two adjacent stator magnetic poles 2 is different. The utility model has the characteristics of smaller cogging torque, better starting and low-speed operation performance and the like, and is suitable for various direct current brushless motors.
Description
Technical field
The utility model relates to technical field of motors, particularly a kind of dc brushless motor stator and rotor device of Low gullet torque.
Background technology
Cogging torque is a kind of intrinsic phenomenon with magneto of teeth groove, and it is under the cold situation of armature winding, the torque that is produced in a circumferential direction by the teeth groove interaction of magnetic field of permanent magnet and armature core.Along with improving constantly of permanent magnetic material performance, magneto more and more widely be applied to high performance speed and position control system, and in the prior art, the cogging torque of magneto is generally bigger, directly influences motor in the low speed of speed control system kind and the accurate location in position control system.
Summary of the invention
At the deficiency that existing product exists, technical problem to be solved in the utility model provides that a kind of cogging torque is less, the dc brushless motor stator and rotor device of startup and low cruise better performances.
Technical solution adopted in the utility model is the dc brushless motor stator and rotor device of a kind of Low gullet torque of design: comprise stator core 1, magnetic shoe 3, rotor 5 and be loaded on its middle armature spindle 4, have the teeth groove more than at least three around stator core 1 endoporus, each teeth groove forms a magnetic pole of the stator 2; At least one pair of above magnetic shoe 3 is fixed on the outer cylinder of rotor 5; Rotor 5 covers are packed in stator core 1 endoporus;
The both sides of the outer surface of A, magnetic shoe 3 form shoulder 6, make the interior thickness of magnetic shoe 3 be thicker than both sides;
The width of B, stator core 1 inner per two adjacent magnetic pole of the stator 2 does not wait.
The dc brushless motor stator and rotor device of the utility model Low gullet torque, owing to take top rake is carried out on the both sides of the outer surface of magnetic shoe, make the magnetic shoe interior thickness be thicker than both sides, when magnetic shoe approaches a magnetic pole of the stator, the air gap of itself and magnetic pole of the stator is bigger, and the cogging torque that makes produce this moment significantly reduces.Simultaneously, also taked to be designed to the width of inner per two the adjacent magnetic pole of the stator of stator core unequal, rotor when rotated, when an edge of magnetic shoe just is on the magnetic pole of the stator center line, another edge of this magnetic shoe is not on the stator rabbet center line, but some skew has disperseed cogging torque just because of this skew, thereby, reduced cogging torque effectively.Through overtesting, the utility model is compared with existing product, can slacken cogging torque reaches more than 90%, can effectively eliminate because the startup that cogging torque causes and the deterioration of low cruise, guarantee motor can stable operation in lower-speed state and can in position control system, accomplish accurate location, simultaneously, the operating efficiency of motor also obtains suitable lifting.
Description of drawings
Fig. 1 is that master of the present utility model cuts open schematic diagram;
Fig. 2 is that the master of existing like product cuts open schematic diagram.
Among the figure: the 1st, stator core, the 2nd, magnetic pole of the stator, the 3rd, magnetic shoe, the 4th, armature spindle, the 5th, rotor, the 6th, shoulder, OA are the magnetic pole of the stator center lines, OB is the stator rabbet center line; 1` is the stator core of existing like product, 2` is the magnetic pole of the stator of existing like product, 3` is the magnetic shoe of existing like product, 4` is the armature spindle of existing like product, 5` is the rotor of existing like product, stator O`A` is the magnetic pole of the stator center line of existing like product, and O`B` is the stator rabbet center line of existing like product.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
Present embodiment is to be made of stator core 1, magnetic pole of the stator 2, magnetic shoe 3, armature spindle 4 and rotor 5.
The centre of stator core 1 has the endoporus of device rotor, (present embodiment is designed to 9 to have teeth groove more than at least three around this endoporus, also can be 5 or 7 or other number), each teeth groove forms a magnetic pole of the stator 2, the width of per two adjacent magnetic pole of the stator 2 does not wait that (width that can be designed as every two magnetic pole of the stator 2 separately equates, the width that also can be designed to each magnetic pole of the stator 2 is all unequal, and the width that also can be designed to per two the adjacent magnetic pole of the stator 2 under other situation does not wait).
The both sides of the outer surface of magnetic shoe 3 form shoulder 6, and (this shoulder 6 can be straight line, also can be curve; When being curve, can be circular segment, also can be the hyperbolic line segment, also can be sinusoidal wave song, or be the curve of other shape.When being straight line, when its starting point is in vertical point and the angle of horizontal direction generally get 5-75 °, the angular range of optimization is 15-35 °), make the interior thickness of magnetic shoe 3 be thicker than both sides.At least one pair of above magnetic shoe 3 (present embodiment is designed to 3 pairs, also can be 1 pair or 2 pairs or 4 pairs or other logarithm of counting) is pasted and fixed on the outer cylinder of rotor 5.
The middle device armature spindle 4 of rotor 5 during cover is packed stator core 1 endoporus in the lump, forms dc brushless motor stator and rotor device of the present utility model.
During machine operation, rotor 5 is done the circumferencial direction rotation around armature spindle 4 in stator core 1 endoporus, and direction of rotation can be clockwise or be counterclockwise.
Because magnetic shoe 3 interior thicknesses are thicker than both sides, rotor 5 in rotary course, when magnetic shoe 3 when approaching a magnetic pole of the stator 2 because its air gap with magnetic pole of the stator 2 is bigger, this moment, the cogging torque of generation was less; Rotor 5 continues rotation, and magnetic shoe 3 progresses into the bottom of magnetic pole of the stator 2, and air gap narrows down to minimum gradually, at this moment, and the cogging torque maximum of generation; Rotor 5 continues rotation, and when magnetic shoe 3 was withdrawn into the edge of magnetic pole of the stator 2 gradually, air gap increased to maximum again gradually, and the cogging torque of generation narrows down to minimum gradually; In rotor rotation process so repeatedly.Because magnetic shoe 3 is when approaching a magnetic pole of the stator 2, its air gap with magnetic pole of the stator 2 is bigger, makes that this moment, the cogging torque of generation significantly reduced.
Because the width of adjacent stators magnetic pole 2 does not wait, rotor 5 is in rotary course, when the center line OA that just is in magnetic pole of the stator 2 when an edge of magnetic shoe 3 goes up, another edge of this magnetic shoe 3 is not on the stator rabbet center line OB, but some skew, disperse cogging torque just because of this skew, made total cogging torque obviously descend.(existing product is because the width of adjacent stators magnetic pole 2` is equal, rotor 5` is in rotary course, when the center line O`A` that just is in magnetic pole of the stator 2` when the edge of magnetic shoe 3` goes up, another edge of this magnetic shoe 3` just in time is on the stator rabbet center line O`B`, like this, cogging torque is in maximum).
In conjunction with the not wide magnetic pole of the stator and the magnetic shoe of uneven gauge, dc brushless motor stator and rotor device of the present utility model can effectively reduce cogging torque and reach 90%, and the operating efficiency of its motor also obtains suitable lifting.
The dc brushless motor stator and rotor device of Low gullet torque of the present utility model is applicable to various dc brushless motors.
Claims (2)
1. the dc brushless motor stator and rotor device of a Low gullet torque, comprise stator core (1), magnetic shoe (3), rotor (5) and be loaded on its middle armature spindle (4), have the teeth groove more than at least three around stator core (1) endoporus, each teeth groove forms a magnetic pole of the stator (2); At least one pair of above magnetic shoe (3) is fixed on the outer cylinder of rotor (5); Rotor (5) cover is packed in stator core (1) endoporus; It is characterized in that:
The both sides of the outer surface of A, magnetic shoe (3) form shoulder (6), make the interior thickness of magnetic shoe (3) be thicker than both sides;
The width of B, inner per two the adjacent magnetic pole of the stator of stator core (1) (2) does not wait.
2. the dc brushless motor stator and rotor device of Low gullet torque according to claim 1, it is characterized in that: shoulder (6) can be straight line and also can be curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201925577U CN201781395U (en) | 2010-05-11 | 2010-05-11 | Direct current brushless motor stator and rotor device with low cogging torque |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201925577U CN201781395U (en) | 2010-05-11 | 2010-05-11 | Direct current brushless motor stator and rotor device with low cogging torque |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201781395U true CN201781395U (en) | 2011-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201925577U Expired - Lifetime CN201781395U (en) | 2010-05-11 | 2010-05-11 | Direct current brushless motor stator and rotor device with low cogging torque |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201781395U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296806A (en) * | 2013-06-07 | 2013-09-11 | 芜湖微特电机有限公司 | Novel energy-saving servo motor |
| CN104158373A (en) * | 2014-08-21 | 2014-11-19 | 江西工埠机械有限责任公司 | External rotor motor |
| CN104158375A (en) * | 2014-08-21 | 2014-11-19 | 江西工埠机械有限责任公司 | Super-low-speed high-torque motor and crane with motor |
| CN104184236A (en) * | 2014-09-05 | 2014-12-03 | 宁波市北仑海伯精密机械制造有限公司 | Permanent magnet for motor and design method thereof |
| CN108429371A (en) * | 2018-03-19 | 2018-08-21 | 上海工程技术大学 | A kind of motor permanent magnet magnetic pole distributed architecture improving normal direction electromagnetic force |
| CN108494204A (en) * | 2018-03-19 | 2018-09-04 | 上海工程技术大学 | A kind of motor permanent magnet magnetic pole transition structure improving normal direction electromagnetic force |
| CN108649720A (en) * | 2018-07-13 | 2018-10-12 | 张喆 | A kind of mute spontaneous electric generator |
-
2010
- 2010-05-11 CN CN2010201925577U patent/CN201781395U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296806A (en) * | 2013-06-07 | 2013-09-11 | 芜湖微特电机有限公司 | Novel energy-saving servo motor |
| CN104158373A (en) * | 2014-08-21 | 2014-11-19 | 江西工埠机械有限责任公司 | External rotor motor |
| CN104158375A (en) * | 2014-08-21 | 2014-11-19 | 江西工埠机械有限责任公司 | Super-low-speed high-torque motor and crane with motor |
| CN104158375B (en) * | 2014-08-21 | 2017-02-01 | 江西工埠机械有限责任公司 | Super-low-speed high-torque motor and crane with motor |
| CN104158373B (en) * | 2014-08-21 | 2017-06-13 | 江西工埠机械有限责任公司 | External rotor electric machine |
| CN104184236A (en) * | 2014-09-05 | 2014-12-03 | 宁波市北仑海伯精密机械制造有限公司 | Permanent magnet for motor and design method thereof |
| CN104184236B (en) * | 2014-09-05 | 2016-09-14 | 宁波市北仑海伯精密机械制造有限公司 | Permanent magnet and the method for designing of this permanent magnet thereof for motor |
| CN108429371A (en) * | 2018-03-19 | 2018-08-21 | 上海工程技术大学 | A kind of motor permanent magnet magnetic pole distributed architecture improving normal direction electromagnetic force |
| CN108494204A (en) * | 2018-03-19 | 2018-09-04 | 上海工程技术大学 | A kind of motor permanent magnet magnetic pole transition structure improving normal direction electromagnetic force |
| CN108649720A (en) * | 2018-07-13 | 2018-10-12 | 张喆 | A kind of mute spontaneous electric generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HU'NAN KELI'ER MOTOR LTD. Free format text: FORMER OWNER: KELI DYNAMO CO LTD, HUNAN Effective date: 20110607 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20110607 Address after: 426181 Hunan province Qiyang Lijiaping Town North Road No. 49 Patentee after: Hu'nan Keli'er Motor Ltd. Address before: 426181 Hunan province Qiyang Lijiaping Town North Road No. 49 Patentee before: Hunan Keli Motor Co., Ltd. Effective date of registration: 20110607 Address after: 426181 Hunan province Qiyang Lijiaping Town North Road No. 49 Patentee after: Hu'nan Keli'er Motor Ltd. Address before: 426181 Hunan province Qiyang Lijiaping Town North Road No. 49 Patentee before: Hunan Keli Motor Co., Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 426181 Hunan province Qiyang Lijiaping Town North Road No. 49 Patentee after: Hunan Kelier motor Limited by Share Ltd Address before: 426181 Hunan province Qiyang Lijiaping Town North Road No. 49 Patentee before: Hu'nan Keli'er Motor Ltd. Address after: 426181 Hunan province Qiyang Lijiaping Town North Road No. 49 Patentee after: Hunan Kelier motor Limited by Share Ltd Address before: 426181 Hunan province Qiyang Lijiaping Town North Road No. 49 Patentee before: Hu'nan Keli'er Motor Ltd. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 426181 Hunan province Qiyang Lijiaping Town North Road No. 49 Patentee after: Collier Electric Machinery Group Co., Ltd. Address before: 426181 Hunan province Qiyang Lijiaping Town North Road No. 49 Patentee before: Hunan Kelier motor Limited by Share Ltd Address after: 426181 Hunan province Qiyang Lijiaping Town North Road No. 49 Patentee after: Collier Electric Machinery Group Co., Ltd. Address before: 426181 Hunan province Qiyang Lijiaping Town North Road No. 49 Patentee before: Hunan Kelier motor Limited by Share Ltd |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110330 |
|
| CX01 | Expiry of patent term |