CN102594085A - Permanent magnet vernier linear motor for urban rail transits - Google Patents
Permanent magnet vernier linear motor for urban rail transits Download PDFInfo
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- CN102594085A CN102594085A CN2012100279449A CN201210027944A CN102594085A CN 102594085 A CN102594085 A CN 102594085A CN 2012100279449 A CN2012100279449 A CN 2012100279449A CN 201210027944 A CN201210027944 A CN 201210027944A CN 102594085 A CN102594085 A CN 102594085A
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Abstract
The invention relates to a permanent magnet vernier linear motor for urban rail transits, which comprises a motor primary (1), and a motor secondary (2) separated from the motor primary (1) through an air gap; the motor primary (1) comprises a flat primary iron core (3), an armature winding (5), flux modulation poles (6), wherein primary teeth (4) protruding out of the periphery of the primary iron core are arranged on the primary iron core (3), the armature winding (5) is wound on the primary teeth (4), and protruding small tooth portions on the primary teeth (4)are flux modulation poles (6), the motor primary (1) is mounted on a train; the motor secondary (2) comprises permanent magnets (7) and a secondary iron core (8), wherein permanent magnets (7) are embedded in the secondary iron core (8) along a horizontal direction in gaps with a same distance, and the motor secondary (2) is arranged on the train rail. The motor can improve the stability of the linear motor for urban rail transits during low velocity operation, the motor efficiency is improved, and high theoretical and practical values are provided.
Description
Technical field
The present invention relates to electrician, motor, field of track traffic, refer in particular to a kind of novel Halbach low-speed high-thrust permanent magnetism vernier linear electric motors that are applicable to urban track traffic.
Background technology
Constantly intensive along with the expansion of urban population and urban construction thing, advantage such as that urban track traffic relies on is convenient, environmental protection, energy-conservation, safety and freight volume are big plays crucial effect in the sustainable development of city.And meanwhile, urban track traffic has also obtained association area scholar's concern more and more widely with the research of traction electric machine.
In the urban track traffic application scenario, traction electric machine mainly is to adopt electric rotating machine and these two kinds of technological approaches of linear electric motors.Adopt the city rail electric car of linear electric motors, electric energy is directly changed into straight-line mechanical energy, and without any need for the transmission device of intermediate conversion mechanism, can avoid sliding variety of issue with idling products; In addition, linear electric motors are compared to electric rotating machine, have reduced the vehicle body volume and weight, thereby have reduced construction cost.Therefore, the linear electric motors that are used for urban track traffic have research and practical value.
Current, city rail traffic is mainly contained line inductance electromotor and permanent magnet linear synchronous motor with the research of linear electric motors.Wherein, it is more that line inductance electromotor is used, but there is deficiency in it at aspects such as power factor, power densities.Traditional permanent magnet linear synchronous motor has the two-fold advantage of magneto and linear electric motors concurrently, compares with line inductance electromotor, and the energy index of permanent magnet linear synchronous motor is high, volume is little, in light weight, and has the dynamic brake function.Yet also there is the big distinct disadvantage of force oscillation amplitude in it, and directly influence location and track following precision are brought the low speed motion stability problem undoubtedly in the city rail traffic application scenario.
If adopt novel Halbach low-speed high-thrust permanent magnetism vernier linear electric motors; Introducing through magnetic flux Wehnelt electrode on the elementary tooth; High-speed side and adjustable magnetic ring structure independently in traditional magnetic gear have been saved; Make electric machine structure more simple, both can governing speed, have advantages such as noise is low, reliability is high, the thrust transmittability big, overload protection again.And the secondary permanent magnet of going up adopts special Halbach array, through adjustment permanent magnet width than and magnetizing direction, can obtain the effective magnetic field harmonic components and the thrust output density that provide bigger, reduce the magnetic flux density and the core loss of secondary yoke.Therefore, be necessary to propose a kind of urban track traffic with novel Halbach low-speed high-thrust permanent magnetism vernier linear electric motors.
Summary of the invention
Technical problem:The present invention is directed to traditional city rail traffic and have the stationarity problem when the low-speed motion with linear electric motors; A kind of urban track traffic is proposed with permanent magnetism vernier linear electric motors; Utilize the modulating action of magnetic flux Wehnelt electrode on the electric motor primary tooth, saved high-speed side and adjustable magnetic ring structure independently in traditional magnetic gear, make electric machine structure more simple; Both can governing speed, have advantages such as noise is low, reliability is high, the thrust transmittability big, overload protection again.Simultaneously secondary permanent magnet adopts special Halbach array, and bigger effective magnetic field harmonic wave composition and thrust output density can be provided, and reduces the magnetic flux density of secondary iron core yoke, reduces core loss.
Technical scheme:For solving the problems of the technologies described above, the invention provides a kind of urban track traffic with permanent magnetism vernier linear electric motors, the motor secondary that this motor comprises electric motor primary, is separated by through air gap with electric motor primary;
Electric motor primary comprises elementary iron core, armature winding, the magnetic flux Wehnelt electrode of flat; Elementary iron core is provided with the elementary tooth that protrudes from its periphery; Armature winding is around on the elementary tooth, and the little toothed portion that protrudes on the elementary tooth is the magnetic flux Wehnelt electrode, and electric motor primary is placed on the train;
Motor secondary comprises permanent magnet, secondary iron core, permanent magnet along continuous straight runs compartment of terrain and embedding equidistantly on secondary iron core, and motor secondary is placed on the train rail.
Has only one deck air gap between electric motor primary and the motor secondary.
The magnetic flux Wehnelt electrode is used to carry out magnetic field modulation, and satisfies the number n of magnetic flux Wehnelt electrode
sEqual electric motor primary armature winding number of pole-pairs n
pWith motor secondary permanent magnet pole logarithm n
rSum.
Permanent magnet material is a neodymium iron boron, and every permanent magnet is divided into three parts, the equal scalable of the width of every part of permanent magnet and magnetizing direction.
The material of elementary iron core and secondary iron core is silicon steel sheet.
Beneficial effect:
(1) saves high-speed side and adjustable magnetic ring structure independently in traditional magnetic gear, made electric machine structure more
Simply, both can governing speed, have advantages such as noise is low, reliability is high, the thrust transmittability big, overload protection again, be applicable to the urban track traffic occasion;
(2) motor is single gap structure, and processing technology is simple, and stability and reliability are improved;
(3) the more magnetic line of force is arranged through air gap in the motor, so effective harmonic wave composition value of air gap flux density is higher than general magnetic field modulation system magneto, thrust output increases;
(4) motor secondary iron core yoke magnetic flux density can reduce in a large number, and this will reduce secondary iron core magnetic vibrating feeder yoke core loss, dwindles secondary iron core yoke portion size, saves material;
(5) isolate through iron core between the secondary permanent magnet, blocked flowing each other of eddy current in each permanent magnet, reduced the eddy current loss in the secondary permanent magnet.
Secondary permanent magnet adopts surperficial plug in construction, makes this motor have the weak magnetic energy power of very wide permanent power, is specially adapted to the occasion that city rail traffic needs flexible pace of change.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Wherein have: electric motor primary 1, motor secondary 2, elementary iron core 3, elementary tooth 4, armature winding 5, magnetic flux Wehnelt electrode 6, permanent magnet 7, secondary iron core 8;
Fig. 2 is the secondary local permanent magnet magnetizing direction sketch map of the present invention;
Wherein have: permanent magnet 7, secondary iron core 8, elementary tooth 4, armature winding 5, the magnetic flux adjustable magnetic utmost point 6.Permanent magnet 7 each utmost point are divided into three parts, and the arrow direction is the magnetizing direction of this part permanent magnet among the figure, and the equal scalable of the width of every part of permanent magnet and magnetizing direction is to reach maximum power output.
Embodiment
The present invention will be described below with reference to accompanying drawings.
The present invention proposes a kind of urban track traffic with low-speed high-thrust permanent magnetism vernier linear electric motors.It is through the effect of magnetic flux Wehnelt electrode on the electric motor primary tooth; Carry out magnetic field modulation; The little problem of thrust fan-out capability when solving traditional line motor low cruise, simultaneously secondary permanent magnet adopts special Halbach array, and bigger effective magnetic field harmonic wave composition and thrust output density can be provided; Reduce the magnetic flux density of secondary iron core yoke, reduce core loss.Therefore, the present invention has also improved electric efficiency when the raising city rail traffic is with linear electric motors low cruise stationarity.
This motor comprises elementary, secondary; Electric motor primary comprises elementary iron core, elementary tooth, armature winding, magnetic flux Wehnelt electrode, and elementary iron core adopts the embedded cursor structure of salient pole, and armature winding is around on the elementary tooth, and the little toothed portion of salient pole is the magnetic flux Wehnelt electrode on the elementary tooth, elementary being placed on the train; Motor secondary comprises permanent magnet, secondary iron core, permanent magnet along continuous straight runs compartment of terrain and embed on secondary iron core secondary being placed on the train rail equidistantly.
Urban track traffic provided by the invention is with permanent magnetism vernier linear electric motors, the motor secondary 2 that this motor comprises electric motor primary 1, is separated by through air gap with electric motor primary 1.
Electric motor primary 1 comprises elementary iron core 3, armature winding 5, the magnetic flux Wehnelt electrode 6 of flat; Elementary iron core 3 is provided with the elementary tooth 4 that protrudes from its periphery; Armature winding 5 is around on the elementary tooth 4, and the little toothed portion of protrusion is magnetic flux Wehnelt electrode 6 on the elementary tooth 4, and electric motor primary 1 is placed on the train.
Motor secondary 2 comprises permanent magnet 7, secondary iron core 8, permanent magnet 7 along continuous straight runs compartment of terrains and embedding equidistantly on secondary iron core 8, and motor secondary 2 is placed on the train rail.
Has only one deck air gap between electric motor primary 1 and the motor secondary 2.
Magnetic flux Wehnelt electrode 6 is used to carry out magnetic field modulation, and satisfies the number n of magnetic flux Wehnelt electrode 6
sEqual electric motor primary 1 armature winding number of pole-pairs n
pWith motor secondary 2 permanent magnet pole logarithm n
rSum.
Permanent magnet 7 materials are neodymium iron boron, and every permanent magnet is divided into three parts, and the arrow direction is the magnetizing direction of this part permanent magnet among Fig. 2, and the equal scalable of the width of every part of permanent magnet and magnetizing direction is to reach maximum power output.
The material of elementary iron core 3 and secondary iron core 8 is silicon steel sheet.
Elementary armature winding number of pole-pairs is the attainable speed no-load voltage ratio of this motor with the ratio of permanent magnet pole logarithm.
The present invention is based on the space magnetic field modulation principle of magnetic flux Wehnelt electrode; Utilize space harmonics to transmit magnetic field and energy; When passing to the alternating current of fixed frequency for the elementary armature winding of these linear electric motors; The travelling-magnetic-field synchronizing speed that the armature winding electric current produces is
; Magnetic field modulation effect through the magnetic flux Wehnelt electrode; In air gap, produce a modulation travelling-magnetic-field; Its synchronizing speed is
; This magnetic field and secondary on permanent magnet interact, thereby drive elementary being synchronized with the movement, negative sign representes that the capable ripple of armature winding magnetic field and modulated magnetic field is in the opposite direction.Realize different synchronization speed
through changing the frequency that feeds winding current; And then obtain different elementary movement velocity
, realize that speed governing drives.
:
is speed ratio, equals
on the numerical value (
).Therefore, this motor satisfies the requirement of when low speed, exporting than high thrust, is applicable to the urban track traffic field.
This motor secondary permanent magnet adopts special Halbach array; Utilize finite element optimization adjustment permanent magnet width ratio and magnetizing direction; Can obtain the effective magnetic field harmonic wave composition and the thrust output density that provide bigger, reduce the magnetic flux density and the core loss of secondary yoke.
The above is merely preferred embodiments of the present invention; Protection scope of the present invention is not exceeded with above-mentioned execution mode; As long as the equivalence that those of ordinary skills do according to disclosed content is modified or changed, all should include in the protection range of putting down in writing in claims.
Claims (5)
1. a urban track traffic is characterized in that with permanent magnetism vernier linear electric motors: the motor secondary (2) that this motor comprises electric motor primary (1), is separated by through air gap with electric motor primary (1);
Electric motor primary (1) comprises elementary iron core (3), armature winding (5), the magnetic flux Wehnelt electrode (6) of flat; Elementary iron core (3) is provided with the elementary tooth (4) that protrudes from its periphery; Armature winding (5) is around on the elementary tooth (4); The little toothed portion that elementary tooth (4) is gone up protrusion is magnetic flux Wehnelt electrode (6), and electric motor primary (1) is placed on the train;
Motor secondary (2) comprises permanent magnet (7), secondary iron core (8), permanent magnet (7) along continuous straight runs compartment of terrain and embedding equidistantly on secondary iron core (8), and motor secondary (2) is placed on the train rail.
2. urban track traffic according to claim 1 is characterized in that with permanent magnetism vernier linear electric motors: have only one deck air gap between electric motor primary (1) and the motor secondary (2).
3. urban track traffic according to claim 1 is characterized in that with permanent magnetism vernier linear electric motors: magnetic flux Wehnelt electrode (6) is used to carry out magnetic field modulation, and satisfies the number n of magnetic flux Wehnelt electrode (6)
sEqual electric motor primary (1) armature winding number of pole-pairs n
pWith motor secondary (2) permanent magnet pole logarithm n
rSum.
4. urban track traffic according to claim 1 is characterized in that with permanent magnetism vernier linear electric motors: permanent magnet (7) material is a neodymium iron boron, and every permanent magnet is divided into three parts, the equal scalable of the width of every part of permanent magnet and magnetizing direction.
5. urban track traffic according to claim 1 is characterized in that with permanent magnetism vernier linear electric motors: the material of elementary iron core (3) and secondary iron core (8) is silicon steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100279449A CN102594085A (en) | 2012-02-09 | 2012-02-09 | Permanent magnet vernier linear motor for urban rail transits |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100279449A CN102594085A (en) | 2012-02-09 | 2012-02-09 | Permanent magnet vernier linear motor for urban rail transits |
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|---|---|
| CN102594085A true CN102594085A (en) | 2012-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100279449A Pending CN102594085A (en) | 2012-02-09 | 2012-02-09 | Permanent magnet vernier linear motor for urban rail transits |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104981969A (en) * | 2013-02-20 | 2015-10-14 | 三菱电机株式会社 | Movable element and linear motor provided with same |
| CN108454650A (en) * | 2018-03-06 | 2018-08-28 | 张英华 | The headstock of high ferro train or the country sedan and control method of high ferro train |
| CN108471221A (en) * | 2018-03-15 | 2018-08-31 | 鲁东大学 | A kind of cylindrical linear motor |
| CN108880164A (en) * | 2018-07-09 | 2018-11-23 | 武汉理工大学 | A kind of two-way modulation composite excitation alternating pole motor |
| CN110014846A (en) * | 2019-01-22 | 2019-07-16 | 南京航空航天大学 | A kind of rail traffic trailer system based on permanent magnet flux switching straight line motor |
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| CN1933304A (en) * | 2006-09-28 | 2007-03-21 | 哈尔滨工业大学 | Horizontal flux flat-plate type permanent-magnetic linear electric machine |
| US20070236090A1 (en) * | 2004-09-22 | 2007-10-11 | Siemens Aktiengesellschaft | Secondary part of an electrical machine |
| CN102082490A (en) * | 2011-01-26 | 2011-06-01 | 东南大学 | High-thrust permanent magnet direct drive linear electric motor |
| CN102104303A (en) * | 2011-01-07 | 2011-06-22 | 东南大学 | Disc-type low-speed large-torque composite motor based on magnetic wheel gear |
| CN202435228U (en) * | 2012-02-09 | 2012-09-12 | 东南大学 | Low-speed high-thrust permanent magnet vernier linear motor for urban rail traffic |
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2012
- 2012-02-09 CN CN2012100279449A patent/CN102594085A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20070236090A1 (en) * | 2004-09-22 | 2007-10-11 | Siemens Aktiengesellschaft | Secondary part of an electrical machine |
| CN1933304A (en) * | 2006-09-28 | 2007-03-21 | 哈尔滨工业大学 | Horizontal flux flat-plate type permanent-magnetic linear electric machine |
| CN102104303A (en) * | 2011-01-07 | 2011-06-22 | 东南大学 | Disc-type low-speed large-torque composite motor based on magnetic wheel gear |
| CN102082490A (en) * | 2011-01-26 | 2011-06-01 | 东南大学 | High-thrust permanent magnet direct drive linear electric motor |
| CN202435228U (en) * | 2012-02-09 | 2012-09-12 | 东南大学 | Low-speed high-thrust permanent magnet vernier linear motor for urban rail traffic |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104981969A (en) * | 2013-02-20 | 2015-10-14 | 三菱电机株式会社 | Movable element and linear motor provided with same |
| CN104981969B (en) * | 2013-02-20 | 2016-12-07 | 三菱电机株式会社 | Movable piece and possess the linear motor of this movable piece |
| CN108454650A (en) * | 2018-03-06 | 2018-08-28 | 张英华 | The headstock of high ferro train or the country sedan and control method of high ferro train |
| CN108471221A (en) * | 2018-03-15 | 2018-08-31 | 鲁东大学 | A kind of cylindrical linear motor |
| CN108880164A (en) * | 2018-07-09 | 2018-11-23 | 武汉理工大学 | A kind of two-way modulation composite excitation alternating pole motor |
| CN108880164B (en) * | 2018-07-09 | 2020-06-19 | 武汉理工大学 | Bidirectional modulation hybrid excitation alternating-pole motor |
| CN110014846A (en) * | 2019-01-22 | 2019-07-16 | 南京航空航天大学 | A kind of rail traffic trailer system based on permanent magnet flux switching straight line motor |
| WO2020151174A1 (en) * | 2019-01-22 | 2020-07-30 | 南京航空航天大学 | Rail transit traction system based on flux-switching permanent magnet linear motor |
| CN110014846B (en) * | 2019-01-22 | 2023-11-07 | 南京航空航天大学 | Rail transit traction system based on permanent magnet flux switching linear motor |
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Application publication date: 20120718 |