CN108988520A - A kind of double salient-pole electric machine - Google Patents

A kind of double salient-pole electric machine Download PDF

Info

Publication number
CN108988520A
CN108988520A CN201810825664.XA CN201810825664A CN108988520A CN 108988520 A CN108988520 A CN 108988520A CN 201810825664 A CN201810825664 A CN 201810825664A CN 108988520 A CN108988520 A CN 108988520A
Authority
CN
China
Prior art keywords
stator
tooth
permanent magnet
machine according
slot
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.)
Granted
Application number
CN201810825664.XA
Other languages
Chinese (zh)
Other versions
CN108988520B (en
Inventor
吴立建
章懰
方攸同
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang University ZJU
Original Assignee
Zhejiang University ZJU
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhejiang University ZJU filed Critical Zhejiang University ZJU
Priority to CN201810825664.XA priority Critical patent/CN108988520B/en
Publication of CN108988520A publication Critical patent/CN108988520A/en
Application granted granted Critical
Publication of CN108988520B publication Critical patent/CN108988520B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/17Stator cores with permanent magnets
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/14Stator cores with salient poles

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

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

A kind of double salient-pole electric machine
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 side stator 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. biconvex electromechanics machine according to claim 1, which is characterized in that the outer profile of the stator is circle.
3. biconvex electromechanics 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. biconvex electromechanics 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. biconvex electromechanics machine according to claim 1, which is characterized in that the tooth body bend mode of the stator tooth is circular arc Transition.
6. biconvex electromechanics machine according to claim 1, which is characterized in that the permanent magnet two sides are equipped with poly- magnetic stator tooth.
7. biconvex electromechanics 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. biconvex electromechanics 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.
CN201810825664.XA 2018-07-25 2018-07-25 A kind of double salient-pole electric machine Active CN108988520B (en)

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 true CN108988520A (en) 2018-12-11
CN108988520B CN108988520B (en) 2019-07-23

Family

ID=64551087

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810825664.XA Active CN108988520B (en) 2018-07-25 2018-07-25 A kind of double salient-pole electric machine

Country Status (1)

Country Link
CN (1) CN108988520B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110112844A (en) * 2019-04-09 2019-08-09 浙江大学 A kind of 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

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1186369A (en) * 1998-01-09 1998-07-01 东南大学 Wide speed regulating range permanent magnetic motor with two salient poles and multi-tapping windings
GB2475811A (en) * 2009-03-18 2011-06-01 Imra Europe Sas A stator assembly incorporating permanent magnets for an inductor 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
CN105932793A (en) * 2016-06-08 2016-09-07 华中科技大学 Doubly salient permanent magnet synchronous motor with unequally spaced stator poles
CN106451834A (en) * 2016-09-30 2017-02-22 江苏大学 Hybrid excitation type magnetic flux switching motor with K-shaped stator cores
TWI618332B (en) * 2015-09-23 2018-03-11 奈美電子股份有限公司 Flux switching permanent magnet motor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1186369A (en) * 1998-01-09 1998-07-01 东南大学 Wide speed regulating range permanent magnetic motor with two salient poles and multi-tapping windings
GB2475811A (en) * 2009-03-18 2011-06-01 Imra Europe Sas A stator assembly incorporating permanent magnets for an inductor 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
TWI618332B (en) * 2015-09-23 2018-03-11 奈美電子股份有限公司 Flux switching permanent magnet motor
CN105932793A (en) * 2016-06-08 2016-09-07 华中科技大学 Doubly salient permanent magnet synchronous motor with unequally spaced stator poles
CN106451834A (en) * 2016-09-30 2017-02-22 江苏大学 Hybrid excitation type magnetic flux switching motor with K-shaped stator cores

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110112844A (en) * 2019-04-09 2019-08-09 浙江大学 A kind of doubly salient permanent magnet motor
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

Also Published As

Publication number Publication date
CN108988520B (en) 2019-07-23

Similar Documents

Publication Publication Date Title
KR102097940B1 (en) Rotating electric machine and manufacturing method of rotor core
CN101978579B (en) Permanent magnet rotor with flux concentrating pole pieces
CN109274240A (en) Compound amorphous alloy axial-flux electric machine
CN104882978B (en) A kind of low torque ripple high efficiency permanent magnet motor stator and rotor structure
CN107528400A (en) Rotor, magneto and compressor
CN104104168B (en) A kind of stator rotor structure of built-in permanent-magnet brushless direct current generator
KR20090004451A (en) Motor
CN108683313A (en) A kind of efficient axial flux permanent magnet motor of high power density
CN109194082A (en) The amorphous alloy axial-flux electric machine of wide weak magnetism speed expansion low rotor loss
CN108988520B (en) A kind of double salient-pole electric machine
CN104426315A (en) Three-phase electromagnetic motor
WO2021120680A1 (en) Motor rotor and alternating-pole motor
US20190036432A1 (en) Permanent Magnet Electric Motor
CN101771317B (en) Permanent magnetism type electric rotating machine
CN110212724A (en) Synchronous magnetic resistance motor and compressor with it
JP2012115070A (en) Rotary electric machine
CN207612139U (en) Rotor, magneto and compressor
CN110112844A (en) A kind of doubly salient permanent magnet motor
CN205544648U (en) For compressor motor with its compressor has
KR20230133912A (en) motor rotor and motor
CN209805640U (en) Self-starting synchronous reluctance motor and compressor with same
CN106849429A (en) A kind of single-phase self-starting permanent magnet synchronous motor
CN107124055B (en) Rotor of compressor, permanent magnet motor and compressor
CN206452284U (en) Motor and the compressor with it
CN201774425U (en) Three-phase four-pole brushless DC (direct current) motor

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant