CN102570751B - Disk type permanent-magnet cursor motor - Google Patents
Disk type permanent-magnet cursor motor Download PDFInfo
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- CN102570751B CN102570751B CN201210014193.7A CN201210014193A CN102570751B CN 102570751 B CN102570751 B CN 102570751B CN 201210014193 A CN201210014193 A CN 201210014193A CN 102570751 B CN102570751 B CN 102570751B
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- permanent magnet
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Abstract
The invention relates to a disk type permanent-magnet cursor motor. The disk type permanent-magnet cursor motor comprises an external rotor (1), an external rotor yoke part (2), external rotor permanent magnets (3), a stator (4), stator teeth (5) which are arranged at the periphery of the stator (4) and protruded outwards, stator permanent magnets (6), windings (7), stator slots (8), a bearing (9) and a supporting shaft (10), wherein the external rotor (1) is connected with the supporting shaft (10) in a rotatable mode through the bearing (9); the external rotor permanent magnets (3) are embedded into the external rotor yoke part (2) at equal intervals along the circumferential direction; the stator (4) has an open slot stator structure; the stator slots (8) are formed in the stator (4); the windings (7) are arranged in the stator slots (8); and each stator permanent magnet (6) is embedded between the two adjacent stator teeth along the circumferential direction. The reliability and output torque of the disk type permanent-magnet cursor motor are improved.
Description
Technical field
The present invention relates to a kind of disk type permanent-magnet cursor motor device, belong to specific type of electric machine technical field.
Background technology
There are some weakness in the cylindrical electrical machine of current common radial magnetic field, as cooling difficulty and rotor core utilance low etc.; Meanwhile, mechanical gearbox is applied at many transmission fields, to realize speedup or deceleration, reaches the requirement of system.But this also makes the volume and weight of whole drive system greatly increase, the corresponding increase of cost of investment, in addition, efficiency is low, noise is large, low-response, transmission precision is low is also its weak point, and the wearing and tearing of gear box can reduce the life and reliability of system.Magnetic gear is a kind of gear structure, the advantages such as it has, and noise is low, freedom from repairs, reliability is high, torque transfer ability large, overload protection.
Disc type electric machine has advantages of that it is unique, the concept of magnetic gear is progressively promoted simultaneously, its range of application also will constantly expand, disc type electric machine is combined with magnetic gear herein, and improve, between stator tooth, embedding permanent magnetism increases air gap flux density, forms a kind of disk type permanent-magnet cursor motor, and its tool has the following advantages:
(1) tray type structure motor has reliable, simple in structure, compact conformation, easy to maintenance, efficiency is high and the feature such as stepless speed regulation, and especially volume is little and lightweight, and being specially adapted to has in the harsh occasion and slowspeed machine requiring volume and weight.
(2) electric machine structure of mirror image symmetry, has offset the unilateral magnetic force between stator and both sides rotor largely, also can improve the capacity of motor simultaneously.
(3) magnetic gear is incorporated in disc type electric machine and forms compound machine, this structure realizes certain speed no-load voltage ratio by magnetic gear, without being equipped with reducing gear.Meanwhile, due to advantages such as magnetic grating of gears is low, freedom from repairs, reliability is high, torque transfer ability large, automatic overload protections.
(4) permanent magnet embedding on stator, interacts with external rotor permanent magnet, has increased air gap flux density, has reduced leakage field, has improved output torque, and these characteristics have broad application prospects it in the field that requires low speed high torque.
The high density designs of motor makes loss and the caloric value increase of motor unit volume, causes the HCJ decline of the rising of the each part of motor temperature, rotor permanent magnet and the process of acceleration permanent magnetic steel accumulation demagnetization effects.The design feature of traditional cylindrical motor has limited the ability of its heat radiation, but in disc type electric machine, the rotor structure of dish type provides a larger radiating surface, be conducive to motor radiating, thereby for the increase of power of motor density provides space, magnetic gear is fused in disc type electric machine simultaneously, can effectively improve reliability, reduce noise, and support automatic overload protection; On stator, embed permanent magnet, effectively increased air gap flux density, improved output torque.
Summary of the invention
technical problem:the present invention is by proposing a kind of disk type permanent-magnet cursor motor, solved that machinery speed increasing gear-box capacity density in existing transmission device is low, the problem such as mechanical wear and noise, the internal rotor of a magnetic gear and adjustable magnetic loop section added permanent magnet on stator independently on the basis of traditional magnetic-field modulation-type permanent magnet direct driving motor, have been saved simultaneously, simplify device manufacture craft, reduced volume, the weight of motor; Reduce the leakage field of motor, reduced core loss; Improve the capacity of efficiency and motor; The motor stabilizing of simultaneously also having removed the larger vibration, noise and the introducing of independent adjustable magnetic ring component that are brought by internal rotor reduces problem.Disc type electric machine structure has higher power density, and simultaneously its application will solve cylindrical radial motor cooling difficulty and the problem such as utilance unshakable in one's determination is low.
technical scheme:for solving the problems of the technologies described above, the invention provides a kind of disk type permanent-magnet cursor motor, this motor comprises external rotor, external rotor yoke portion, outer rotor permanent magnet, stator, is arranged on stator periphery and outside outstanding stator tooth, stator permanent magnet, winding, stator slot, bearing, bolster;
Motor outer rotor is rotationally connected by bearing and back shaft, and outer rotor permanent magnet is equally spaced embedding on rotor yoke along the circumferential direction; Stator adopts open slot stator structure, and stator offers stator slot, and winding is placed in stator slot; Stator permanent magnet along the circumferential direction embeds between two adjacent stator tooths, and stator is fixed by back shaft; Stator and external rotor are mirror image in the axial direction, and external rotor is in outside, and stator is in inner side.
Preferably, between external rotor and stator, there is air gap.
Preferably, in external rotor one side, all outer rotor permanent magnet polarity is identical and contrary with the upper outside rotor permanent magnet polarity of opposite side, is positioned at the rotor permanent magnet of the same side and stator permanent magnet magnetizing direction in the same way simultaneously; Rotor permanent magnet and stator permanent magnet magnetizing direction are axial.
Preferably, the material of external rotor yoke and stator is silicon steel.
Preferably, the number of stator tooth in described stator one side
equal the number of homonymy outer rotor permanent magnet
with stator one side field pole logarithm
sum.
Preferably, rotor permanent magnet and stator permanent magnet material are neodymium iron boron.
beneficial effect:
(1) save mechanical speed-changing gear case, do not had mechanical wear, maintenance and the noise problem of gear box, improved device reliability; Improve motor speed simultaneously, reduced the volume of motor, weight and manufacturing cost;
(2) electric machine structure of mirror image symmetry, has offset the unilateral magnetic force between stator and both sides rotor largely, also can improve the capacity of motor simultaneously
(3) in motor, have the more magnetic line of force by air gap, therefore effective Resonance Wave Composition value of air gap flux density is higher than general magnetic field modulation permanent-magnet motor, and output torque increases;
(4) design of permanent magnet on rotor and stator, reduces motor flux leakage, thereby has reduced loss;
(5) can provide under the low speed larger torque;
(6) between rotor permanent magnet, isolate by iron core, blocked the mutual of eddy current in each permanent magnet and flowed, reduced the eddy current loss in rotor permanent magnet;
(7) rotor adopts high energy product neodymium iron boron excitation, there is no slip ring and brush, without additional power source excitation, have simple in structure, volume little lightweight, power density is high, efficiency is high and the advantage such as good reliability
(8) tray type structure provides larger radiating surface, has good cooling effect compared with radial motor, has higher utilance unshakable in one's determination, also has larger power density.
Brief description of the drawings
Fig. 1 is part-structure schematic diagram of the present invention;
Wherein have: external rotor 1, external rotor yoke portion 2, outer rotor permanent magnet 3, stator 4, stator tooth 5, stator permanent magnet 6, stator slot 8, bearing 9, bolster 10;
Fig. 2 is that in the present invention, stator is radially cut the detailed expansion schematic diagram after then stretching open;
Wherein have: stator 4, stator permanent magnet 6, stator slot 8;
Fig. 3 is that stator of the present invention, rotor are radially cut the detailed expansion schematic diagram after then stretching open;
Wherein have: external rotor 1, external rotor yoke portion 2, outer rotor permanent magnet 3, stator 4, stator tooth 5, stator permanent magnet 6, winding 7, stator slot 8.
Embodiment
The present invention will be described below with reference to accompanying drawings.
The present invention relates to a kind of disk type permanent-magnet cursor motor, it is by the magnetic field modulation effect of stator tooth in motor, can in ensureing magnetic gear compound machine advantage, save adjustable magnetic ring in traditional magnetic gear structure and an internal rotor of magnetic gear, solve large, the baroque problem of conventional motors low cruise volume, the permanent magnetism physical efficiency simultaneously embedding on stator increases air gap flux density, improves output torque.
Referring to Fig. 1-3, disk type permanent-magnet cursor motor comprises external rotor 1, external rotor yoke portion 2, outer rotor permanent magnet 3, stator 4, is arranged on stator 4 peripheries and outside outstanding stator tooth 5, stator permanent magnet 6, winding 7, stator slot 8, bearing 9, bolster 10;
Motor outer rotor 1 is rotationally connected by bearing 9 and back shaft 10, and outer rotor permanent magnet 3 is equally spaced embedding on rotor yoke 2 along the circumferential direction; Stator 4 adopts open slot stator structure, and stator 4 offers stator slot 8, and winding 7 is placed in stator slot 8; Stator permanent magnet 6 along the circumferential direction embeds between two adjacent stator tooths, and stator 4 is fixing by back shaft 10; Stator 4 and external rotor 1 are mirror image in the axial direction, and external rotor 1 is in outside, and stator 4 is in inner side.
Between external rotor 1 and stator 4, there is air gap.
In external rotor 1 one sides, all outer rotor permanent magnet 3 polarity are identical and contrary with 3 polarity of outer rotor permanent magnet on opposite side, are positioned at the rotor permanent magnet 3 of the same side and stator permanent magnet 6 magnetizing directions in the same way simultaneously; Rotor permanent magnet 3 and stator permanent magnet 6 magnetizing directions are axial.
The material of external rotor yoke 2 and stator 4 is silicon steel.
The number of stator tooth 5 in described stator 4 one sides
equal the number of homonymy outer rotor permanent magnet 3
with stator one side field pole logarithm
sum.
Rotor permanent magnet 3 and stator permanent magnet 6 materials are neodymium iron boron.
Outer rotor permanent magnet number n
rwith armature winding number of pole-pairs n
psum is the number n of stator tooth 5
s, the adjustable magnetic ring that stator tooth 5 has substituted in traditional magnetic gear carries out magnetic field modulation.Stator 4 and the external rotor 1 of this motor are mirror image in the axial direction, and external rotor 1 is in outside, and stator 4 is in inner side.
The winding 7 field pole logarithms of stator one side are the attainable speed no-load voltage ratio of this device with the ratio of outer rotor permanent magnet 3 numbers of the same side.By outer rotor permanent magnet number and the stator number of teeth of suitable selection motor, can be applicable to the different low-speed direct driving occasions that need.This device has replaced the adjustable magnetic ring structure in traditional magnetic gear by choose reasonable stator tooth, has simplified processing technology, has improved the reliability of device, and on stator, has increased permanent magnet, has strengthened the energy transmission of air-gap field, has improved output torque.
Disk type permanent-magnet cursor motor disclosed by the invention, this motor is the permanent magnet direct-driven motor based on magnetic field modulation principle.It is by the magnetic field modulation effect of stator tooth in motor, solve large, the baroque shortcoming of conventional motors low cruise volume, also saved independently adjustable magnetic ring structure of the internal rotor of magnetic gear in traditional magnetic gear permanent magnet direct-driven motor and, on stator, increased permanent magnet simultaneously, can reduce the leakage field of motor, reduce core loss.
Outer rotor permanent magnet number n
rwith armature winding number of pole-pairs n
psum is the number n of stator tooth 5
s, the adjustable magnetic ring that stator tooth 5 has substituted in traditional magnetic gear carries out magnetic field modulation.Stator 4 and the external rotor 1 of this motor are mirror image in the axial direction, and external rotor 1 is in outside, and stator 4 is in inner side.The winding 7 field pole logarithms of stator one side are the attainable speed no-load voltage ratio of this device with the ratio of outer rotor permanent magnet 3 numbers of the same side.By outer rotor permanent magnet number and the stator number of teeth of suitable selection motor, can be applicable to the different low-speed direct driving occasions that need.
In the time that stator armature winding passes to the alternating current of certain frequency, the rotating magnetic field angular speed that armature winding electric current produces is
, by the magnetic field modulation effect of stator tooth, in air gap, producing a modulating wave magnetic field, its angular velocity of rotation is-
, the permanent magnet interaction on this magnetic field and external rotor, drives external rotor synchronous rotary, and negative sign represents that modulating wave magnetic field is contrary with the direction of rotation in armature winding magnetic field.Thereby the frequency that passes into winding current by change realizes different angular speed
, and then obtain different external rotor rotary speeies-
, realize speed governing and drive.
:
for speed no-load voltage ratio, equal the ratio of the field pole logarithm that outer rotor permanent magnet number and stator armature winding produce.
On this device external rotor and stator, have permanent magnet, by optimizing and revising permanent magnet width and thickness, compared with traditional three air gaps or two air gap magnetic gear compound machine, it can provide larger effective magnetic field Resonance Wave Composition and output torque.
The winding 7 field pole logarithms of stator one side are the attainable speed no-load voltage ratio of this device with the ratio of outer rotor permanent magnet 3 numbers of the same side.By permanent magnet number on the external rotor of suitable selection motor and the stator number of teeth, can be applicable to the different low-speed direct driving occasions that need.
General principle of the present invention is the space magnetic field modulation principle of magnetic gear adjustable magnetic ring, utilizes space harmonics transferring energy, and this device both may operate in motoring condition, also may operate in generating state.
In the time that this device operates in motoring condition, in stator winding, pass to the alternating current of certain frequency, the rotating magnetic field angular speed that armature winding electric current produces is
, through the modulating action of stator tooth, in air gap, producing a modulating wave magnetic field, its angular velocity of rotation is-
, the permanent magnet interaction at this magnetic field and external rotor place, drives external rotor synchronous rotary, and negative sign represents that modulating wave magnetic field is contrary with the direction of rotation in armature winding magnetic field.Thereby realize different angular speed by the frequency that changes armature supply
, and then obtain different external rotor rotary speeies-
, realize speed governing and drive.
:
for speed no-load voltage ratio, equal outer rotor permanent magnet and count n
rwith stator armature winding magnetic field winding number of pole-pairs n
pratio.Therefore, this device can be applicable to the occasion that needs low speed high torque, meets the requirement to larger torque output in the time of low speed.
In the time that this device operates in generating state, permanent magnet low-speed external rotor with angular speed-
rotation, through the modulating action of stator tooth, modulates the magnetic field of linkage stator, and its rotating magnetic field angular speed is
, this magnetic field and motor stator winding produce relative motion, and cutting winding conducting wire produces electric energy.
:
for speed no-load voltage ratio, equal outer rotor permanent magnet and count n
rwith stator armature winding magnetic field number of pole-pairs n
pratio.Under normal circumstances, outer rotor permanent magnet is counted n
rmuch larger than stator field number of pole-pairs n
pso this can realize motor generator operation under low-speed conditions.
In external rotor and stator, permanent magnet magnetizing direction is axial charging.Can regulate width and the thickness of the permanent magnet on outer rotor permanent magnet and stator, to obtain maximum output torque.
Compared with common column type radial magnetic field motor, disc type electric machine has higher power density, more have superiority in the slim installation occasion of ask for something, the plurality of advantages such as that plate type permanent magnetic brushless electric machine has is simple in structure, reliable, control flexibly, commutation ability is good, efficiency is high.In direct driving field, require to there is larger output torque under low speed, this motor has solved the bulky shortcoming of conventional motors low cruise, internal rotor of mechanical gearbox and magnetic gear and adjustable magnetic ring component added permanent magnet on stator are independently saved, reduce the volume of motor, efficiency and the reliability of system are improved, can the larger stabilizing torque of output, simultaneously this motor mirror image symmetrical structure also can increase the capacity of device itself and offset largely stator and both sides rotor between unilateral magnetic force.This motor saves an internal rotor and adjustable magnetic ring component independently on the basis of traditional magnetic gear structure simultaneously, has simplified processing technology, has saved permanent magnetic material, has removed the larger vibration and the noise that are brought by internal rotor.
The foregoing is only preferred embodiments of the present invention; protection scope of the present invention is not limited with above-mentioned execution mode; in every case the equivalence that those of ordinary skill in the art do according to disclosed content is modified or is changed, and all should include in the protection range of recording in claims.
Claims (5)
1. a disk type permanent-magnet cursor motor, is characterized in that: this motor comprises external rotor (1), external rotor yoke portion (2), outer rotor permanent magnet (3), stator (4), is arranged on stator (4) periphery and outside outstanding stator tooth (5), stator permanent magnet (6), winding (7), stator slot (8), bearing (9), bolster (10);
Motor outer rotor (1) is rotationally connected by bearing (9) and back shaft (10), and outer rotor permanent magnet (3) is equally spaced embedding on rotor yoke (2) along the circumferential direction; Stator (4) adopts open slot stator structure, and stator (4) offers stator slot (8), and winding (7) is placed in stator slot (8); Stator permanent magnet (6) along the circumferential direction embeds between two adjacent stator tooths, and stator (4) is fixing by back shaft (10); Stator (4) and external rotor (1) are mirror image in the axial direction, and external rotor (1) is in outside, and stator (4) is in inner side;
In external rotor (1) one side, all outer rotor permanent magnets (3) polarity is identical and contrary with outer rotor permanent magnet on opposite side (3) polarity, is positioned at the rotor permanent magnet (3) of the same side and stator permanent magnet (6) magnetizing direction in the same way simultaneously; Rotor permanent magnet (3) and stator permanent magnet (6) magnetizing direction are axial.
2. disk type permanent-magnet cursor motor according to claim 1, is characterized in that: between external rotor (1) and stator (4), have air gap.
3. disk type permanent-magnet cursor motor according to claim 1, is characterized in that: the material of external rotor yoke (2) and stator (4) is silicon steel.
4. disk type permanent-magnet cursor motor according to claim 1, is characterized in that: the number n of stator tooth (5) in described stator (4) one sides
sequal the number n of homonymy outer rotor permanent magnet (3)
rwith stator one side field pole logarithm n
psum.
5. disk type permanent-magnet cursor motor according to claim 1, is characterized in that: rotor permanent magnet (3) and stator permanent magnet (6) material are neodymium iron boron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210014193.7A CN102570751B (en) | 2012-01-17 | 2012-01-17 | Disk type permanent-magnet cursor motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210014193.7A CN102570751B (en) | 2012-01-17 | 2012-01-17 | Disk type permanent-magnet cursor motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102570751A CN102570751A (en) | 2012-07-11 |
| CN102570751B true CN102570751B (en) | 2014-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210014193.7A Expired - Fee Related CN102570751B (en) | 2012-01-17 | 2012-01-17 | Disk type permanent-magnet cursor motor |
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| Country | Link |
|---|---|
| CN (1) | CN102570751B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017205666B4 (en) * | 2016-05-25 | 2024-06-27 | Zf Friedrichshafen Ag | Steering with an actuator and use of the steering with actuator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1787332A (en) * | 2005-11-16 | 2006-06-14 | 哈尔滨工业大学 | Short magnetic circuit mixing exciting switch Magnet resistance motor |
| CN202004600U (en) * | 2011-01-07 | 2011-10-05 | 东南大学 | Magnetic gear based disc type composite motor with low speed and large torque |
| CN202405972U (en) * | 2012-01-17 | 2012-08-29 | 东南大学 | Disc-type permanent magnet cursor motor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1919063A1 (en) * | 2006-11-02 | 2008-05-07 | Sy.Tra.Ma. S.R.L. | Flux-reversal linear motor |
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2012
- 2012-01-17 CN CN201210014193.7A patent/CN102570751B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1787332A (en) * | 2005-11-16 | 2006-06-14 | 哈尔滨工业大学 | Short magnetic circuit mixing exciting switch Magnet resistance motor |
| CN202004600U (en) * | 2011-01-07 | 2011-10-05 | 东南大学 | Magnetic gear based disc type composite motor with low speed and large torque |
| CN202405972U (en) * | 2012-01-17 | 2012-08-29 | 东南大学 | Disc-type permanent magnet cursor motor |
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| Publication number | Publication date |
|---|---|
| CN102570751A (en) | 2012-07-11 |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20140709 Termination date: 20220117 |