CN105337467A - 12/14 bearing-less switched reluctance motor with adjustable air gap - Google Patents
12/14 bearing-less switched reluctance motor with adjustable air gap Download PDFInfo
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- CN105337467A CN105337467A CN201410387325.XA CN201410387325A CN105337467A CN 105337467 A CN105337467 A CN 105337467A CN 201410387325 A CN201410387325 A CN 201410387325A CN 105337467 A CN105337467 A CN 105337467A
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Abstract
The invention discloses a 12/14 bearing-less switched reluctance motor with an adjustable air gap. The 12/14 bearing-less switched reluctance motor comprises a rotor core and a stator core; the rotor core is connected with the stator core through a shaft (8); the rotor core comprises a rotor yoke (6) and rotor magnetic pole teeth (7), wherein the rotor yoke (6) is positioned in the bottom end; uniformly distributed 14 rotor magnetic pole teeth (7) are embedded at the upper end of the rotor yoke (6); the stator core comprises a stator yoke (1) in the topmost end, 4 stator auxiliary magnetic pole teeth (2) and 8 stator torque magnetic pole teeth (3); the stator auxiliary magnetic pole teeth (2) comprise adjusting magnetic pole teeth (11) and permanent magnets (10) tightly clung to the inner sides of the stator auxiliary magnetic pole teeth (2); and a gap exists between the stator core and the rotor core to form the air gap (9). The 12/14 bearing-less switched reluctance motor has the characteristics of the axial suspension, the adjustable air gap, and the high power density.
Description
Technical field
The present invention relates to a kind of bearing-free switch reluctance motor, particularly the adjustable bearing-free switch reluctance motor of a kind of air gap, be particularly suitable for low speed, large torque, application scenario that axial space is little.
Background technology
Traditional switch reluctance machine rotor is without permanent magnet coil, and structure is simple, and sturdy and durable, reliability is high, and controllability is good, is therefore greatly developed, and product is widely used in drive system of electric automobile, household electrical appliance and universal industrial etc.But along with day by day highlighting of energy crisis and environmental problem, the problems such as Conventional switched reluctance motor torque ripple is large, Conversion of Energy density is low, noise is large also cause the extensive concern of people.Produce the switched reluctance machines of disc type axial magnetic field subsequently not only in conjunction with the simple advantage of regular tap reluctance motor structure, and axial length is short, volume is little, lightweight, power density is high, perfect heat-dissipating, structure diversification, different performance requirements can be met, there is broad range of application, be therefore more and more subject to people's attention.But there is axial magnetic pull between axial magnetic field switched reluctance machines stator and rotor, plain shaft fails to magnetic field switching reluctance motor the axial magnetic pull that makes full use of between stator and rotor, thus produces noise and heat.And disk type switch magnetoresistance electrical machinery is better than a very important feature of regular tap reluctance motor is that its rotor magnetic circuit does not rely on and rotor radius, only relevant with stator and rotor transverse tooth thickness degree, this can allow to increase rotor magnetic pole number, thus reduces vibration & noise further.Modal axial disk switched reluctance machines is 6/4 structure axial magnetic field disk type switch magnetoresistance electrical machinery of three-phase, and this structural electromotor rotor number of poles is few, and fail to give full play to the advantage of disc type electric machine, and this motor adopts long magnetic structure, power density is low.As everyone knows, air gap is the very important parameter of switched reluctance machines, and it directly affects the performance of motor.And the selection of regular tap reluctance motor air gap is subject to processing the serious restriction of technique, selected air gap parameter must in technique allowed band.
Summary of the invention
For the deficiencies in the prior art, the object of the invention is the shortcoming overcoming existing axial magnetic field disk type switch magnetoresistance electrical machinery, provide a kind of air gap adjustable and do not rely on processing technology require 12/14 bearing-free switch reluctance motor.
For achieving the above object, present invention employs following technical scheme:
Adjustable 12/14 bearing-free switch reluctance motor of a kind of air gap, comprise rotor core and stator core, described rotor core is connected with stator core by axle 8, described rotor core comprises rotor yoke 6, rotor magnetic pole tooth 7, wherein, rotor yoke 6 is positioned at bottom, the upper end of rotor yoke 6 is inlaid with equally distributed 14 rotor magnetic pole teeth 7, described stator core comprises stator yoke 1 topmost, be embedded in 4 stator auxiliary magnetic pole teeth 2 below stator yoke 1 and 8 stator torque magnetic pole tooths 3, described stator auxiliary magnetic pole tooth 2 comprises the permanent magnet 10 regulating magnetic pole tooth 11 and be close to inside stator auxiliary magnetic pole tooth 2, stator auxiliary magnetic pole tooth 2 is wound with auxiliary adjustment coil 4, on stator torque magnetic pole tooth 3, coiling is by torque winding coil 5, gap is left between described stator core and rotor core, form air gap 9.
As the further optimization of such scheme, described permanent magnet 10 magnetizing direction is axially.
Further, permanent magnet 10 polarity of adjacent two stator auxiliary magnetic pole teeth is contrary.
Further, described air gap 9 width is less than 1mm.
Further, described auxiliary adjustment coil 2 and the integrated setting of torque winding coil 5.
Further, in order to formed described axle 8 material comprises electrical pure iron, 1J50 or 40Cr makes.
Further, the mode that described 4 stator auxiliary magnetic pole teeth 2 and 8 stator torque magnetic pole tooths 3 coordinate with two stator torque magnetic pole tooths according to a stator auxiliary magnetic pole tooth is evenly distributed on below stator yoke 1.
Compared with prior art, beneficial effect main manifestations of the present invention is:
1. the present invention takes full advantage of the axial magnetic pull between axial magnetic field switched reluctance machines stator and rotor, achieves the axial suspension of bearing-free switch reluctance motor, and realize motor gas-gap adjustable, do not rely on processing technology requirement.
2. the present invention's permanent magnet replaces coil sections to produce magnetic pull, decreases coil current and the number of turn, thus reduces copper wastage.
3. the present invention adopts short magnetic circuit structural, improves power of motor density.Motor of the present invention makes full use of axial magnetic pull between axial magnetic field switched reluctance machines stator and rotor, and noise decrease shortens flux closure loop, improves power of motor density.
Accompanying drawing explanation
Fig. 1 is the 3-D solid structure schematic diagram of one embodiment of the invention.
Fig. 2 is the plan structure schematic diagram of stator core in one embodiment of the invention.
Fig. 3 is one embodiment of the invention rotor iron core plan structure schematic diagram.
Fig. 4 is the forward sight structural representation in auxiliary adjustment coil flux path in one embodiment of the invention.
Fig. 5 is torque winding coil magnetic flux path schematic diagram in one embodiment of the invention.
Wherein 1 is stator yoke, and 2 is stator auxiliary magnetic pole teeth, and 3 is stator torque magnetic pole tooths, and 4 is auxiliary adjustment coils, and 5 is torque winding coils, and 6 is rotor yokes, and 7 is rotor magnetic pole teeth, and 8 is axles, and 9 is air gaps, and 10 is permanent magnets, and 11 is regulate magnetic pole tooth.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, more specific detail is done to the present invention.
Embodiment 1
As shown in Fig. 1 ~ 5, adjustable 12/14 bearing-free switch reluctance motor of a kind of air gap, comprise rotor core and stator core, described rotor core is connected with stator core by axle 8, described rotor core comprises rotor yoke 6, rotor magnetic pole tooth 7, wherein, rotor yoke 6 is positioned at bottom, the upper end of rotor yoke 6 is inlaid with equally distributed 14 rotor magnetic pole teeth 7, described stator core comprises stator yoke 1 topmost, be embedded in 4 stator auxiliary magnetic pole teeth 2 below stator yoke 1 and 8 stator torque magnetic pole tooths 3, described stator auxiliary magnetic pole tooth 2 comprises the permanent magnet 10 regulating magnetic pole tooth 11 and be close to inside stator auxiliary magnetic pole tooth 2, stator auxiliary magnetic pole tooth 2 is wound with auxiliary adjustment coil 4, on stator torque magnetic pole tooth 3, coiling is by torque winding coil 5, gap is left between described stator core and rotor core, form air gap 9.Described permanent magnet 10 magnetizing direction is axially.Permanent magnet 10 polarity of adjacent two stator auxiliary magnetic pole teeth is contrary.Described air gap 9 width is less than 1mm.Described auxiliary adjustment coil 2 and the integrated setting of torque winding coil 5.In order to formed described axle 8 material comprises electrical pure iron, 1J50 or 40Cr makes.The mode that described 4 stator auxiliary magnetic pole teeth 2 and 8 stator torque magnetic pole tooths 3 coordinate with two stator torque magnetic pole tooths according to a stator auxiliary magnetic pole tooth is evenly distributed on below stator yoke 1.
During work, by the winding coil series connection on torque magnetic pole tooth A1, A2, A3, A4; Winding coil series connection on torque magnetic pole tooth B1, B2, B3, B4.Winding coil series connection on auxiliary magnetic pole tooth P1, P2, P3, P4.
Adjustable 12/14 bearing-free switch reluctance motor of air gap is made up of stator core, auxiliary adjustment coil 4, torque winding coil 5, rotor core, axle 8.Wherein stator core forms adjustable 12/14 bearing-free switch reluctance motor α, β two 4 magnetic poles in direction of air gap along 4 stator auxiliary magnetic pole teeth 2 that+x ,-x ,+y and-y place, and is connected between them by stator yoke 1.Each stator auxiliary magnetic pole tooth 2 is wound with auxiliary adjustment coil 4, for regulating the size of air gap.Stator auxiliary magnetic pole tooth 2 is by permanent magnet 10 and regulate magnetic pole tooth 11 to assemble, and for reducing the number of turn and the electric current of auxiliary adjustment coil 4, and then reduces the copper loss of motor.8 stator torque magnetic pole tooths 3 of stator core form 8 magnetic poles of adjustable 12/14 bearing-free switch reluctance motor A, B two-phase of air gap, connected by stator yoke 1 between them, each stator torque magnetic pole tooth 3 is wound with torque winding coil 5, for generation of rotating torques.The upside of stator core is rotor core, leaves gap and form air-gap between stator core and rotor core.In addition, auxiliary magnetic pole tooth 2 polar arc of stator core equals a rotor polar moment, for generation of stable suspending power.Torque winding coil 5 on two adjacent stator torque magnetic pole tooths 2 is connected and is energized, for shortening magnetic flux path simultaneously.
The principle of the present embodiment is: auxiliary adjustment coil 4 is formed magnetic circuit for adjustable 12/14 bearing-free switch reluctance motor of air gap provided axial magnetic pull by suspend magnetic pole tooth, air gap, rotor magnetic pole tooth 7, rotor yoke 6, axle 8 of stator, and pass through the size of the size adjustment axial magnetic pull of regulating winding electric current, and then regulate the size of air gap.For the magnetic flux path of stator auxiliary magnetic pole tooth P2, P3, magnetic pull of the present invention with magnetic magnetic flux path 1 be: magnetic flux is from the N pole of the permanent magnet of auxiliary magnetic pole tooth P3, the S pole of auxiliary magnetic pole tooth P3 permanent magnet is finally got back to again, as shown in solid black lines in Fig. 4 through the adjustment magnetic pole tooth of the air gap of air gap, rotor magnetic pole tooth 7, rotor yoke 6, axle 8, the other end, stator auxiliary magnetic pole tooth P2, stator yoke 1.The permanent magnet flux path 2 of magnetic pull of the present invention is: magnetic flux is from the N pole of the permanent magnet of auxiliary magnetic pole P2, the S pole of auxiliary magnetic pole tooth P2 permanent magnet is finally got back to again, as shown in blue solid lines in Fig. 4 through the adjustment magnetic pole tooth of the air gap of air gap, rotor magnetic pole tooth 7, rotor yoke 6, axle 8, the other end, stator auxiliary magnetic pole tooth P3, stator yoke 1.When air gap is too large, auxiliary adjustment coil leads to the electric current of forward, and it is contrary that the magnetic field that electric current produces and permanent magnet 10 produce magnetic field, and the total magnetic flux of magnetic circuit strengthens, and magnetic pull increases, and air gap reduces thereupon.When air gap is too little, auxiliary adjustment coil 4 leads to reverse current, and it is contrary that the magnetic field that electric current produces and permanent magnet 10 produce magnetic field, and the total magnetic flux of magnetic circuit weakens, and air gap increases thereupon.Forward current is led to for auxiliary adjustment coil 4, the electromagnetism magnetic flux path of magnetic pull is: from the winding coil of magnetic pole P3, (magnetic pole that coil produces is equivalent to the N pole) of permanent magnet to magnetic flux, get back to magnetic pole P2 winding coil (magnetic pole that coil produces is equivalent to the S pole of permanent magnet) through the air gap of air gap, rotor magnetic pole tooth 7, rotor yoke 6, the other end and finally get back to again magnetic pole P3 winding coil, as shown in dotted line red in Fig. 4.The magnetic flux producing magnetic pull in the present invention provides primarily of permanent magnet 10, and this makes the number of turn of auxiliary adjustment coil 4 and electric current all very little.The copper loss of motor is directly proportional to coil current, that is: P
cu=I
2r, the therefore minimizing of auxiliary adjustment coil current, contribute to the minimizing of copper wastage.Torque generating principle is: the winding coil on two adjacent stator torque magnetic pole tooths 3 is series relationship, during work, is energized simultaneously, forms loop, realizes short magnetic circuit structural.When machine operation according to the break-make of electric current in the position of rotor in time controlling torque winding coil 5.In rotor rotation process, when rotor magnetic pole tooth 7 starts have overlapping with stator torque magnetic pole tooth 3, inductance starts to increase, and produces positive torque.Torque winding coil 5 produce magnetic flux path be made up of stator core, the air gap between stator torque iron core and rotor core, rotor core, for B1, B2 two winding coil conducting of magnetic pole, its magnetic circuit is: magnetic flux is from stator torque magnetic pole B1, through the air gap of air gap, rotor magnetic pole tooth 7, rotor yoke 6, rotor magnetic pole tooth 7, the other end, flow through magnetic pole B2, magnetic pole B1 is got back to again, as shown in Figure 5 through the stator yoke 1 of about 1/6th.
Fig. 2 is the vertical view of the adjustable 12/14 bearing-free switch reluctance motor stator core of technical solution of the present invention air gap, and stator core contains 4 stator auxiliary magnetic pole teeth, 2,8 stator torque magnetic pole tooths 3.
Fig. 3 is the vertical view of the adjustable 12/14 bearing-free switch reluctance motor rotor core of technical solution of the present invention air gap, and rotor core contains 14 tooth poles.
Fig. 4 is the magnetic flux path front view that the magnetic pull of adjustable 12/14 bearing-free switch reluctance motor of technical solution of the present invention air gap produces, permanent magnet forms permanent magnet circuit by air gap, rotor magnetic pole tooth 7, rotor yoke 6, axle 8, stator adjustment magnetic pole tooth 11, stator yoke 1, produces main magnetic pull.Auxiliary adjustment coil 4 forms electromagnetic circuit by air gap, rotor magnetic pole tooth 7, rotor yoke 6, regulates the size of air gap.Provide the magnetic flux path of magnetic pull generation for the magnetic flux path of auxiliary magnetic pole tooth P2, P3 in figure.
Fig. 5 is the torque pole magnetic flux path figure of technical solution of the present invention 12/14 bearing-free switch reluctance motor, and the winding coil series connection of torque magnetic pole tooth A1, A2, A3, A4 of stator core is energized simultaneously; The winding coil series connection of torque magnetic pole tooth B1, B2, B3, B4 is energized simultaneously.For B1 and B2 conducting in figure, give the magnetic flux path figure of motor.
The material that axle 5 used in above-described embodiment adopts magnetic property good is made, as the magnetic material etc. such as electrical pure iron, various carbon steel, cast iron, cast steel, steel alloy, 40Cr, 1J50 and 1J79.After the electromagnetic wire coiling that auxiliary adjustment coil 2, torque winding coil 3 available conductive are good, paint-dipping drying forms.
In addition to the implementation, the present invention can also have other execution modes.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection range of application claims.
Claims (7)
1. adjustable 12/14 bearing-free switch reluctance motor of air gap, comprise rotor core and stator core, described rotor core is connected with stator core by axle (8), it is characterized in that: described rotor core comprises rotor yoke (6), rotor magnetic pole tooth (7), wherein, rotor yoke (6) is positioned at bottom, and the upper end of rotor yoke (6) is inlaid with equally distributed 14 rotor magnetic pole teeth (7)
Described stator core comprises stator yoke (1) topmost, be embedded in 4 stator auxiliary magnetic pole teeth (2) below stator yoke (1) and 8 stator torque magnetic pole tooths (3), described stator auxiliary magnetic pole tooth (2) comprises the permanent magnet (10) regulating magnetic pole tooth (11) and be close to stator auxiliary magnetic pole tooth (2) inner side, stator auxiliary magnetic pole tooth (2) is wound with auxiliary adjustment coil (4), the upper coiling of stator torque magnetic pole tooth (3) is by torque winding coil (5)
Leave gap between described stator core and rotor core, form air gap (9).
2. adjustable 12/14 bearing-free switch reluctance motor of air gap according to claim 1, is characterized in that: described permanent magnet (10) magnetizing direction is for axial.
3. adjustable 12/14 bearing-free switch reluctance motor of air gap according to claim 1, is characterized in that: permanent magnet (10) polarity of adjacent two stator auxiliary magnetic pole teeth is contrary.
4. adjustable 12/14 bearing-free switch reluctance motor of air gap according to claim 1, is characterized in that: described air gap (9) width is less than 1mm.
5. adjustable 12/14 bearing-free switch reluctance motor of air gap according to claim 1, is characterized in that: described auxiliary adjustment coil (2) and torque winding coil (5) integrated setting.
6. adjustable 12/14 bearing-free switch reluctance motor of air gap according to claim 1, is characterized in that: in order to formed described axle (8) material comprises electrical pure iron, 1J50 or 40Cr makes.
7. adjustable 12/14 bearing-free switch reluctance motor of air gap according to claim 1, it is characterized in that, the mode that described 4 stator auxiliary magnetic pole teeth (2) and 8 stator torque magnetic pole tooths (3) coordinate with two stator torque magnetic pole tooths according to a stator auxiliary magnetic pole tooth is evenly distributed on below stator yoke (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410387325.XA CN105337467B (en) | 2014-08-08 | 2014-08-08 | A kind of adjustable 12/14 bearing-free switch reluctance motor of air gap |
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| CN201410387325.XA CN105337467B (en) | 2014-08-08 | 2014-08-08 | A kind of adjustable 12/14 bearing-free switch reluctance motor of air gap |
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| CN105337467B CN105337467B (en) | 2018-02-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109672276A (en) * | 2018-12-21 | 2019-04-23 | 南京航空航天大学 | A kind of alternately pole permanent magnet bias bearing-free double salient-pole electric machine and its control method |
| CN113078793A (en) * | 2021-05-14 | 2021-07-06 | 上海理工大学 | Air gap self-adaptive switched reluctance motor stator and rotor structure |
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| JP2015002587A (en) * | 2013-06-14 | 2015-01-05 | 富士重工業株式会社 | Axial gap power generation body, setting method of dimension of core, and engine generator |
| JP2015035910A (en) * | 2013-08-09 | 2015-02-19 | アルプス電気株式会社 | Rotary actuator |
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| JP2011250651A (en) * | 2010-05-31 | 2011-12-08 | Daihatsu Motor Co Ltd | Axial gap motor |
| CN102223036A (en) * | 2011-06-16 | 2011-10-19 | 东南大学 | Hybrid excitation E-shaped iron core axial magnetic field permanent magnet brushless motor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109672276A (en) * | 2018-12-21 | 2019-04-23 | 南京航空航天大学 | A kind of alternately pole permanent magnet bias bearing-free double salient-pole electric machine and its control method |
| CN109672276B (en) * | 2018-12-21 | 2021-01-15 | 南京航空航天大学 | Alternating pole permanent magnet biased bearingless doubly salient motor and control method thereof |
| CN113078793A (en) * | 2021-05-14 | 2021-07-06 | 上海理工大学 | Air gap self-adaptive switched reluctance motor stator and rotor structure |
| CN113078793B (en) * | 2021-05-14 | 2022-07-29 | 上海理工大学 | Air gap self-adaptive switched reluctance motor stator and rotor structure |
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Inventor after: Chen Yangzhong Inventor before: Wu Jian |
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Effective date of registration: 20180115 Address after: No. 965, Dingsheng Road, Songjiang District, Shanghai Applicant after: Great engineering technology (Shanghai) Co., Ltd. Address before: 215021 202E unit of international science and Technology Park, No. 1355, Jinji Lake Road, Suzhou Industrial Park, Suzhou, Jiangsu Applicant before: SUZHOU MAILITE ELECTROMECHANICAL TECHNOLOGY CO., LTD. |
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