CN108988520B - A kind of double salient-pole electric machine - Google Patents
A kind of double salient-pole electric machine Download PDFInfo
- Publication number
- CN108988520B CN108988520B CN201810825664.XA CN201810825664A CN108988520B CN 108988520 B CN108988520 B CN 108988520B CN 201810825664 A CN201810825664 A CN 201810825664A CN 108988520 B CN108988520 B CN 108988520B
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- Prior art keywords
- stator
- tooth
- permanent magnet
- electric machine
- pole electric
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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
- H02K1/17—Stator cores with permanent magnets
-
- 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
- H02K1/14—Stator cores with salient poles
Abstract
The invention discloses a kind of double salient-pole electric machine, including stator, rotor, permanent magnet and armature winding, stator tooth and rotor tooth are respectively equipped on stator and rotor, the yoke portion of stator and stator tooth constitute stator slot；Permanent magnet is located in stator slot, and one end is embedded in the yoke portion of stator；The tooth top of stator tooth is evenly distributed in the inner circle of stator, the bending of the tooth body of the stator tooth adjacent with permanent magnet, so that the stator slot embedded with permanent magnet and the area equation of residue stator slot or being close.Using the present invention, it can preferably solve the problems, such as that effectively stator groove area reduces caused by increasing magnet size, to improve the torque density of motor.
Description
Technical field
The invention belongs to magneto fields, more particularly, to a kind of biconvex electromechanics machine.
Background technique
Doubly salient permanent magnet motor is a kind of stator type magneto being mounted on permanent magnet in stator yoke, is turned with traditional
Subtype magneto is compared, and it is excellent that double salient-pole electric machine has that rotor high mechanical strength, structure are simple, permanent magnet demagnetization risk is small etc.
Point has won extensive concern.
However, the magnet size of double salient-pole electric machine and stator slot size are restricted there is mutual.Stator internal-and external diameter not
In the case where change, increasing magnet size will lead to the reduction of stator groove area, and vice versa, this leads to the torque of double salient-pole electric machine
Density is lower.
In existing improved double salient-pole electric machine structure, a part of permanent magnet is embedded into stator slot, is somebody's turn to do with alleviating
Problem.If the Chinese patent literature of Publication No. CN103490579A discloses a kind of novel multi-phase biconvex machine magneto, packet
It including: stator core, armature winding, permanent magnet and rotor core, wherein stator core is made of multiple segmented stator cores, point
Section stator core has multiple stator salient poles being distributed at certain intervals, and adjacent stator salient poles constitute stator slot, armature around
Group wire turn is embedded in stator slot, crosses over three and the above stator salient poles in armature winding between adjacent wire turn section, and segmentation is fixed
There is an interval between sub- iron core yoke part, form yoke portion slot, permanent magnet is fixed in yoke portion slot, and rotor is salient-pole structure, without forever
Magnet, coil winding.
Above structure alleviates the problem of stator groove area after insertion permanent magnet reduces to a certain extent, but this still can
Cause the stator groove area embedded with permanent magnet to be less than other stator slots, to guarantee that copper loss caused by three-phase windings is equal, owns
Effective groove area of stator slot is equal to the smallest stator groove area.Therefore this structure motor torque density still compared with
It is low.
By adjusting the position of stator tooth, above-mentioned each unequal problem of stator groove area can solve.However, this side
Face, which will lead to stator tooth and withstand in stator inner circle, to be unevenly distributed, so that magnetic resistance can be sent out with the rotation of rotor under no-load condition
Life significantly changes, and increases the cogging torque of motor, to increase the torque pulsation of motor；On the other hand three-phase windings can also be made
Axis, which is spatially distributed, becomes extremely uneven, increases the three-phase imbalance of motor.
Summary of the invention
The present invention provides a kind of biconvex electromechanics machine, it is effectively fixed caused by magnet size preferably to solve to increase
The problem of pilot trench area reduces, to improve the torque density of motor.
A kind of double salient-pole electric machine, including stator, rotor, permanent magnet and armature winding, it is fixed to be respectively equipped on stator and rotor
Sub- tooth and rotor tooth, the yoke portion of the stator and stator tooth constitute stator slot, and the permanent magnet is located in stator slot, and one end is embedding
In the yoke portion of stator；The tooth top of the stator tooth is evenly distributed in the inner circle of stator, the tooth of the stator tooth adjacent with permanent magnet
Body bending so that embedded with permanent magnet stator slot with residue stator slot area equation or be close.
Technical solution of the present invention guarantees that the tooth top of stator tooth is evenly distributed in the inner circle of stator, while increasing stator
Effective groove area of slot.When the stator slot embedded with permanent magnet is with the area equation of residue stator slot or when being close, can be improved
The torque density of motor.
Preferably, the area equation of stator slot and remaining stator slot embedded with permanent magnet.When area equation, motor turns
Square density highest.
The armature winding is wound on each stator tooth in the form of concentratred winding, and is advised according to linkage flux change
It restrains identical principle and is divided into three-phase.
The outer profile of the stator can be circle, or polygon.When the outer profile of customization is polygon,
Number of edges is identical as permanent magnet number；At this point, permanent magnet is fixed at the stator yoke on angle of polygon, in addition to permanent magnet near zone,
Other thickness of stator yoke everywhere are all the same.
Preferably, the tooth body bend mode of the stator tooth is broken line, the tooth top center line and tooth body of the stator tooth
There are an angles for center line.Easily controllable precision, guarantee are embedded with permanent magnet to the bend mode of broken line in the actual production process
Stator slot and remaining stator slot area equation.
The tooth body bend mode of the stator tooth can also use arc transition, can be according to the size adjusting circular arc of permanent magnet
Crooked radian.
Permanent magnet two sides can add poly- magnetic stator tooth in the stator slot, so that permanent magnet magnetic flux first passes through stator yoke again
Facilitate reduction leakage field with around armature winding whole linkage on the stator teeth by stator tooth.
Permanent magnet two sides can also add radiator in the stator slot, to enhance the heat-sinking capability of permanent magnet, improve
The permitted copper loss upper limit of motor helps to increase electric current, improves the torque density of motor.
Preferably, adjacent three, permanent magnet interval stator tooth.
Number of stator teeth NS, number of rotor teeth NRWith permanent magnet number NMMeet:
Wherein, k is positive integer.
Under the premise of the present invention is by keeping stator tooth tooth top to be uniformly distributed, it is bent tooth body, to make embedded with permanent magnet
Stator slot and remaining stator slot area equation.Compared to existing same size double salient-pole electric machine, larger size can be applied
Permanent magnet, and available bigger effective stator groove area is conducive to increase armature winding wire cross-section area, reduce
Winding resistance increases the electric current for allowing to be passed through, to improve the torque density of motor.
Detailed description of the invention
The schematic cross-section that Fig. 1 is the stator outer profile of motor of the present invention when being circle；
The schematic cross-section that Fig. 2 is the stator outer profile of motor of the present invention when being polygon；
Fig. 3 is the tooth body change in location schematic diagram of motor side of the present invention stator tooth；
Fig. 4 is the tooth body angle change schematic diagram of motor side of the present invention stator tooth；
Fig. 5 is the schematic cross-section of existing bisalient-pole permanent-magnet body motor；
The torque profile comparison diagram of Fig. 6 is stator outer profile when being circle motor and existing motor of the present invention.
In figure: 1 is stator, and 2 be rotor, and 3 be permanent magnet, and 4 be armature winding, and 11 be middle stator tooth, and 12 be side stator tooth,
13 be poly- magnetic stator tooth.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
When the present embodiment and attached drawing only elaborate that motor of the present invention has 12 stator tooths, 8 rotor tooths, 4 pieces of permanent magnets
The case where, but it is suitable for other rotor numbers of teeth, permanent magnet number doubly salient permanent magnet motor.
As shown in Figure 1, a kind of double salient-pole electric machine, including stator 1, rotor 2, permanent magnet 3, armature winding 4, set on stator 1
There is a stator tooth, stator tooth arranged for interval forms stator slot between stator tooth.Permanent magnet 3 is located in stator slot, and end is fixed on
In the stator yoke of stator trench bottom.Adjacent permanent magnet 3 is spaced three stator tooths, and the stator tooth adjacent with permanent magnet is Bian Dingzi
Tooth 12 is middle stator tooth 11 between two side stator tooths 12.
Stator tooth includes tooth top and tooth body, and the tooth top center line of middle stator tooth 11 is overlapped with tooth body center line；Side stator tooth
There are an angles with tooth body center line for 12 tooth top center line.Tooth top is evenly distributed in the inner circle of stator 1, middle stator tooth 11
The center of circle of 1 inner circle of stator is intersected at the tooth top center line of side stator tooth 12.
Since the tooth top center line and tooth body center line of side stator tooth 12 are there are an angle, the tooth body of side stator tooth 12 is curved
Song, so that the area equation of the stator slot embedded with permanent magnet 3 and remaining stator slot.Wherein, embedded with the stator groove area of permanent magnet 3
For the sum of 3 two sides groove area of permanent magnet.
3 two sides of permanent magnet can add poly- magnetic stator tooth 13 in stator slot, can also add radiator.
When the outer profile of stator is polygon, the number of edges of polygon is identical as permanent magnet number.As shown in Fig. 2, removing permanent magnetism
Outside body near zone, stator yoke thickness is all the same everywhere.
Guarantee the identical tooth body position that side stator tooth need to be adjusted according to the size of permanent magnet of the area of each stator slot
It sets and angle.After magnet size increases, the stator groove area embedded with permanent magnet reduces, and is less than other stator groove areas.This
When, it can be adjusted with the tooth body position of opposite side stator tooth or angle.
As shown in figure 3, keep the tooth top of side stator tooth 12 constant, the tooth top center line and tooth body center line of side stator tooth 12
Angle degree it is constant, the tooth body of side stator tooth 12 is moved along dotted line to middle 11 side of stator tooth, as shown in phantom in FIG., is made
Obtain the area equation of all stator slots.As shown in figure 4, keeping the tooth top of side stator tooth 12 constant, tooth body angle changes, and makes
It is mobile to middle 11 side of stator tooth to obtain tooth body, as shown in phantom in FIG., so that the area of all stator slots is equal again.
As shown in figure 5, causing in permanent magnet a part insertion stator slot of existing doubly salient permanent magnet motor embedded with permanent magnet
Stator groove area be much smaller than other stator groove areas.For guarantee three-phase windings generate copper loss it is identical, each stator slot it is effective
Area is equal to the smallest stator groove area, so that its power density is lower.
Selection stator outer profile is the motor of the new construction of the present invention of circular same size and the electricity of existing traditional structure
Machine compares test, and steady state torque comparison of wave shape figure is obtained when optimal size parameter is with identical copper loss, such as Fig. 6 institute
Show, it can be seen that the steady state torque of motor of the present invention is higher than existing motor, and average torque is bigger than existing motor by 25%.
Content described in this specification embodiment is only the explanation to invention, is not to limit the present invention
System, protection scope of the present invention is not construed as being only limitted to particular content described in embodiment, in spirit and original of the invention
Made any modification, replacement and change etc., are included within the scope of protection of the present invention within then.
Claims (10)
1. a kind of double salient-pole electric machine, including stator, rotor, permanent magnet and armature winding, stator is respectively equipped on stator and rotor
Tooth and rotor tooth, the yoke portion of the stator and stator tooth constitute stator slot, it is characterised in that:
The permanent magnet is located in stator slot, and one end is embedded in the yoke portion of stator；The tooth top of the stator tooth is evenly distributed on fixed
In the inner circle of son, the tooth body of the stator tooth adjacent with permanent magnet is bent, so that the stator slot embedded with permanent magnet and remaining stator slot
Area equation or be close.
2. double salient-pole electric machine according to claim 1, which is characterized in that the outer profile of the stator is circle.
3. double salient-pole electric machine according to claim 1, which is characterized in that the outer profile of the stator is polygon, described
The number of edges of polygon is identical as permanent magnet number.
4. double salient-pole electric machine according to claim 1, which is characterized in that the tooth body bend mode of the stator tooth is folding
Line, there are an angles with tooth body center line for the tooth top center line of the stator tooth.
5. double salient-pole electric machine according to claim 1, which is characterized in that the tooth body bend mode of the stator tooth is circular arc
Transition.
6. double salient-pole electric machine according to claim 1, which is characterized in that the permanent magnet two sides are equipped with poly- magnetic stator tooth.
7. double salient-pole electric machine according to claim 1, which is characterized in that the permanent magnet two sides are equipped with radiator.
8. double salient-pole electric machine according to claim 1, which is characterized in that adjacent three, permanent magnet interval stator tooth.
9. double salient-pole electric machine according to claim 1, which is characterized in that stator slot and remaining stator slot embedded with permanent magnet
Area equation.
10. double salient-pole electric machine according to claim 1, which is characterized in that number of stator teeth NS, number of rotor teeth NRAnd permanent magnet
Number NMMeet:
Wherein, k is positive integer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810825664.XA CN108988520B (en) | 2018-07-25 | 2018-07-25 | A kind of double salient-pole electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810825664.XA CN108988520B (en) | 2018-07-25 | 2018-07-25 | A kind of double salient-pole electric machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108988520A CN108988520A (en) | 2018-12-11 |
| CN108988520B true CN108988520B (en) | 2019-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810825664.XA Active CN108988520B (en) | 2018-07-25 | 2018-07-25 | A kind of double salient-pole electric machine |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110112844B (en) * | 2019-04-09 | 2020-10-30 | 浙江大学 | Doubly salient permanent magnet motor |
| CN110289707A (en) * | 2019-07-18 | 2019-09-27 | 浙江大学 | A kind of LTL type double-salient-pole mixed excitation generator |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1063878C (en) * | 1998-01-09 | 2001-03-28 | 东南大学 | Wide speed regulating range permanent magnetic motor with two salient poles and multi-tapping windings |
| GB2475811B (en) * | 2009-03-18 | 2012-02-01 | Imra Europe Sas | An electrical machine |
| CN102611219A (en) * | 2012-02-28 | 2012-07-25 | 东南大学 | High-reliability half stator-tooth winded stator-surface mounted permanent magnet motor |
| CN202798196U (en) * | 2012-09-24 | 2013-03-13 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet switch flux linkage motor |
| CN103490579A (en) * | 2013-09-09 | 2014-01-01 | 何嘉颖 | Novel multiphase doubly salient permanent magnet motor |
| WO2017050266A1 (en) * | 2015-09-23 | 2017-03-30 | 奈美电子股份有限公司 | Magnetic flux switching type permanent magnet motor |
| CN105932793B (en) * | 2016-06-08 | 2018-07-03 | 华中科技大学 | A kind of not equidistant bisalient-pole permanent-magnet synchronous machine of stator poles |
| CN106451834B (en) * | 2016-09-30 | 2018-08-10 | 江苏大学 | A kind of K shapes stator core mixed field excitation type flux switch motor |
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| CN108988520A (en) | 2018-12-11 |
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