CN102570751A - Disk type permanent-magnet cursor motor - Google Patents
Disk type permanent-magnet cursor motor Download PDFInfo
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- CN102570751A CN102570751A CN2012100141937A CN201210014193A CN102570751A CN 102570751 A CN102570751 A CN 102570751A CN 2012100141937 A CN2012100141937 A CN 2012100141937A CN 201210014193 A CN201210014193 A CN 201210014193A CN 102570751 A CN102570751 A CN 102570751A
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- external rotor
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- rotor
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
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 desk permanent-magnet vernier electric machine, belong to the specific type of electric machine technical field.
Background technology
There are some weakness in the cylindrical electrical machine of present common radial magnetic field, and is low etc. like cooling difficulty and rotor core utilance; Simultaneously, 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 increase greatly, the corresponding increase of cost of investment, and in addition, efficient is low, noise is big, low-response, transmission precision are low also is its weak point, the wearing and tearing of gear box can reduce the life-span and the reliability of system.The magnetic gear is a kind of gear structure, advantages such as it has, and noise is low, freedom from repairs, reliability is high, the torque transfer ability is big, overload protection.
Disc type electric machine has its unique advantage; The notion of magnetic gear progressively obtains promoting simultaneously, and its range of application also will constantly enlarge, and disc type electric machine combined with the magnetic gear here; And improve; Between stator tooth, embedding permanent magnetism increases air gap flux density, forms a kind of desk permanent-magnet vernier motor, and it has following advantage:
(1) the tray type structure motor have reliable, simple in structure, compact conformation, easy to maintenance, efficient is high and characteristics such as stepless speed regulation, especially volume is little and in light weight, being specially adapted to has in the harsh occasion and slowspeed machine that requires volume and weight.
(2) electric machine structure of mirror image symmetry has been offset the unilateral magnetic force between stator and both sides rotor largely, also can improve the capacity of motor simultaneously.
(3) the magnetic gear is incorporated into forms compound machine in the disc type electric machine, this structure realizes the certain speed no-load voltage ratio through the magnetic gear, need not to be equipped with reducing gear.Simultaneously, because advantages such as the magnetic grating of gears is low, freedom from repairs, reliability is high, the torque transfer ability is big, automatic overload protections.
(4) permanent magnet that on stator, embeds interacts with external rotor permanent magnet, has increased air gap flux density, has reduced leakage field, has improved the output torque, and these characteristics have broad application prospects it in requiring the field of low speed high torque.
The high density designs of motor makes and the loss and the caloric value increase of motor unit volume causes the HCJ decline of each partly temperature rising of motor, rotor permanent magnet and the process of acceleration permanent magnetic steel accumulation demagnetization effects.The design feature of traditional cylindrical motor has limited its heat dissipation capability; But the rotor structure of dish type provides a bigger radiating surface in the disc type electric machine, helps motor radiating, thereby the space is provided for the increase of power of motor density; Simultaneously the magnetic gear is fused in the disc type electric machine; Can improve reliability effectively, reduce noise, and support automatic overload protection; On stator, embed permanent magnet, effectively increased air gap flux density, improved the output torque.
Summary of the invention
Technical problem:The present invention is through proposing a kind of desk permanent-magnet vernier motor; Solved that mechanical step-up gear power density in the existing transmission device is low, problem such as mechanical wear and noise; The internal rotor of a magnetic gear and adjustable magnetic loop section and on stator, added permanent magnet independently on the basis of traditional magnetic field modulation formula permanent magnet direct driving motor, have been saved simultaneously; Simplify the device manufacture craft, reduced volume, the weight of motor; Reduce the leakage field of motor, reduced core loss; Improved the capacity of efficient and motor; Also removed the motor stabilizing property reduction problem of the bigger vibration, noise and the introducing of independent adjustable magnetic ring component that bring by internal rotor simultaneously.The disc type electric machine structure has higher power density, and its application simultaneously will solve problems such as cylindrical radial motor cooling difficulty and utilance unshakable in one's determination are low.
Technical scheme:For solving the problems of the technologies described above; The invention provides a kind of desk permanent-magnet vernier motor, this motor comprises external rotor, external rotor yoke portion, external rotor permanent magnet body, stator, is arranged on stator periphery and outwards outstanding stator tooth, stator permanent magnet, winding, stator slot, bearing, bolster;
Motor outer rotor is rotationally connected through bearing and back shaft, and the external rotor permanent magnet body is along the circumferential direction equally spaced to embed on rotor yoke; Stator adopts the open slot stator structure, and stator offers stator slot, and winding places stator slot; Stator permanent magnet along the circumferential direction embeds between two adjacent stator tooths, and stator is fixed through back shaft; Stator and external rotor are mirror image in the axial direction, and external rotor is in the outside, and stator is in the inboard.
Preferably, between external rotor and the stator air gap is arranged.
Preferably, on external rotor one side all external rotor permanent magnet body polarity identical and with opposite side on external rotor permanent magnet body polarity opposite, rotor permanent magnet and the stator permanent magnet magnetizing direction that is positioned at the same side simultaneously is in the same way; 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 equals homonymy external rotor permanent magnet body on said stator one side number
and stator one side field pole logarithm
sum.
Preferably, rotor permanent magnet and stator permanent magnet material are neodymium iron boron.
Beneficial effect:
(1) saves the mechanical speed-changing gear case, do not had mechanical wear, maintenance and the noise problem of gear box, improved device reliability; Improved motor speed simultaneously, reduced the volume of motor, weight and manufacturing cost;
(2) electric machine structure of mirror image symmetry has been offset the unilateral magnetic force between stator and both sides rotor largely, also can improve the capacity of motor simultaneously
(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, the output torque increases;
(4) design of permanent magnet on rotor and the stator reduces motor flux leakage, thereby has reduced loss;
(5) bigger torque can be provided under low speed;
(6) isolate through unshakable in one's determination between the rotor permanent magnet, blocked flowing each other of eddy current in each permanent magnet, reduced the eddy current loss in the rotor permanent magnet;
(7) rotor adopts high energy product neodymium iron boron excitation, does not have slip ring and brush, need not the additional power source excitation, have simple in structure, volume little in light weight, power density is high, efficient is high and advantage such as good reliability
(8) tray type structure provides bigger radiating surface, has better cooling effect than radial motor, has higher utilance unshakable in one's determination, also has bigger power density.
Description of drawings
Fig. 1 is a part-structure sketch map of the present invention;
Wherein have: external rotor 1, external rotor yoke portion 2, external rotor permanent magnet body 3, stator 4, stator tooth 5, stator permanent magnet 6, stator slot 8, bearing 9, bolster 10;
Fig. 2 radially cuts the detailed expansion sketch map after stretching then open for stator among the present invention;
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 sketch map after stretching then open;
Wherein have: external rotor 1, external rotor yoke portion 2, external rotor permanent magnet body 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 desk permanent-magnet vernier motor; It is through the magnetic field modulation effect of stator tooth in the motor; Can when guaranteeing magnetic gear compound machine advantage, save adjustable magnetic ring and an internal rotor of magnetic gear in traditional magnetic gear structure; Solved big, the baroque problem of conventional motors low cruise volume, the permanent magnetism physical efficiency that embeds on the stator simultaneously increases air gap flux density, improves the output torque.
Referring to Fig. 1-3, desk permanent-magnet vernier motor comprises external rotor 1, external rotor yoke portion 2, external rotor permanent magnet body 3, stator 4, is arranged on stator 4 peripheries and outwards outstanding stator tooth 5, stator permanent magnet 6, winding 7, stator slot 8, bearing 9, bolster 10;
Motor outer rotor 1 is rotationally connected through bearing 9 and back shaft 10, and external rotor permanent magnet body 3 is along the circumferential direction equally spaced to embed on rotor yoke 2; Stator 4 adopts the open slot stator structure, and stator 4 offers stator slot 8, and winding 7 places stator slot 8; Stator permanent magnet 6 along the circumferential direction embeds between two adjacent stator tooths, and stator 4 is fixing through back shaft 10; Stator 4 and external rotor 1 are mirror image in the axial direction, and external rotor 1 is in the outside, and stator 4 is in the inboard.
Between external rotor 1 and the stator 4 air gap is arranged.
On external rotor 1 one sides all external rotor permanent magnet body 3 polarity identical and with opposite side on external rotor permanent magnet body 3 polarity opposite, the rotor permanent magnet 3 that is positioned at the same side simultaneously and stator permanent magnet 6 magnetizing directions are in the same way; Rotor permanent magnet 3 is axial with stator permanent magnet 6 magnetizing directions.
The material of external rotor yoke 2 and stator 4 is silicon steel.
On one side of the stator 4 the number of stator teeth 5
is equal to the outer rotor permanent magnet 3 ipsilateral number
and the side of the stator magnetic pole pairs
sum.
Rotor permanent magnet 3 is neodymium iron boron with stator permanent magnet 6 materials.
External rotor permanent magnet body 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.The stator 4 and the external rotor 1 of this motor are mirror image in the axial direction, and external rotor 1 is in the outside, and stator 4 is in the inboard.
The winding 7 field pole logarithms of stator one side are this with the ratio of external rotor permanent magnet body 3 numbers of the same side and install attainable speed no-load voltage ratio.Through the external rotor permanent magnet body number and the stator number of teeth of suitable selection motor, can be applicable to the low-speed direct driving occasion of different needs.This device has replaced the adjustable magnetic ring structure in traditional magnetic gear through the choose reasonable stator tooth, has simplified processing technology, has improved the reliability of device, and on stator, has increased permanent magnet, has strengthened the NE BY ENERGY TRANSFER of air-gap field, has improved the output torque.
Desk permanent-magnet vernier motor disclosed by the invention, this motor are based on the permanent magnet direct-drive formula motor of magnetic field modulation principle.It is through the magnetic field modulation effect of stator tooth in the motor; Solved big, the baroque shortcoming of conventional motors low cruise volume; Internal rotor and one who has also saved magnetic gear in traditional magnetic gear permanent magnet direct-drive formula motor is the adjustable magnetic ring structure independently; Increase permanent magnet on the stator simultaneously, can reduce the leakage field of motor, reduced core loss.
External rotor permanent magnet body 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.The stator 4 and the external rotor 1 of this motor are mirror image in the axial direction, and external rotor 1 is in the outside, and stator 4 is in the inboard.The winding 7 field pole logarithms of stator one side are this with the ratio of external rotor permanent magnet body 3 numbers of the same side and install attainable speed no-load voltage ratio.Through the external rotor permanent magnet body number and the stator number of teeth of suitable selection motor, can be applicable to the low-speed direct driving occasion of different needs.
When the stator armature winding passes to the alternating current of certain frequency; The rotating magnetic field angular speed that the armature winding electric current produces is
; Magnetic field modulation effect through stator tooth; In air gap, produce a modulating wave magnetic field; Its angular velocity of rotation is-
; Permanent magnet on this magnetic field and the external rotor interacts; Drive external rotor and rotate synchronously, negative sign representes that the direction of rotation in modulating wave magnetic field and armature winding magnetic field is opposite.Thereby realize different angular speed
through changing the frequency that feeds winding current; And then obtain different external rotor rotary speeies-
, realize that speed governing drives.
:
is the speed no-load voltage ratio, equals the ratio of the field pole logarithm that external rotor permanent magnet body number and stator armature winding produce.
On this device external rotor and the stator permanent magnet is arranged all, through optimizing and revising permanent magnet width and thickness, compare with traditional three air gaps or two air gap magnetic gear compound machine, it can provide bigger effective magnetic field harmonic wave composition and output torque.
The winding 7 field pole logarithms of stator one side are this with the ratio of external rotor permanent magnet body 3 numbers of the same side and install attainable speed no-load voltage ratio.Through the permanent magnet number on the external rotor of suitable selection motor and the stator number of teeth, can be applicable to the low-speed direct driving occasion of different needs.
Basic principle of the present invention is the space magnetic field modulation principle of magnetic gear adjustable magnetic ring, utilizes space harmonics to transmit energy, and this device both may operate in motoring condition, also may operate in generating state.
When this device operates in motoring condition; Pass to the alternating current of certain frequency in the stator winding; The rotating magnetic field angular speed that the armature winding electric current produces is
; Modulating action through stator tooth; In air gap, produce a modulating wave magnetic field; Its angular velocity of rotation is-
; The permanent magnet at this magnetic field and external rotor place interacts, and drives external rotor and rotates synchronously, and negative sign representes that the direction of rotation in modulating wave magnetic field and armature winding magnetic field is opposite.Thereby the frequency through changing armature supply realizes different angular speed
; And then obtain different external rotor rotary speeies-
, realize that speed governing drives.
:
Be the speed no-load voltage ratio, equal the external rotor permanent magnet body and count n
rWith stator armature winding magnetic field winding number of pole-pairs n
pThe ratio.Therefore, this device can be applicable to the occasion that needs low speed high torque, satisfies the requirement of when low speed, big torque being exported.
When this device operates in generating state; The permanent magnet low-speed external rotor rotates with angular speed-
; Modulating action through stator tooth; Modulate the magnetic field of linkage stator; Its rotating magnetic field angular speed is
; This magnetic field and motor stator winding produce relative motion, and the cutting winding conducting wire produces electric energy.
:
Be the speed no-load voltage ratio, equal the external rotor permanent magnet body and count n
rWith stator armature winding field pole logarithm n
pThe ratio.Generally, the external rotor permanent magnet body is counted n
rMuch larger than stator field number of pole-pairs n
pSo this can realize motor generator operation under low-speed conditions.
The permanent magnet magnetizing direction is axial charging in external rotor and the stator.Can regulate the width and the thickness of the permanent magnet on external rotor permanent magnet body and the stator, to obtain maximum output torque.
Compare with common column type radial magnetic field motor; Disc type electric machine has higher power density; More have superiority simple in structure, reliable, plurality of advantages such as control is flexible, commutation ability is good, efficient height that the desk permanent-magnet brushless electric machine has in the slim installation occasion of ask for something.In direct driving field; Require to have bigger output torque under the low speed; This motor has solved the bulky shortcoming of conventional motors low cruise; Save internal rotor of mechanical gearbox and magnetic gear and adjustable magnetic ring component and on stator, added permanent magnet independently, reduced the volume of motor, improved the efficient and the reliability of system; Can the bigger stabilizing torque of output, simultaneously this motor mirror image symmetrical structure also can increase the capacity of device itself and offset stator largely and the 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 bigger vibration and the noise that are brought by internal rotor.
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 (6)
1. a desk permanent-magnet vernier motor is characterized in that: stator tooth (5), stator permanent magnet (6), winding (7), stator slot (8), bearing (9), bolster (10) that this motor comprises external rotor (1), external rotor yoke portion (2), external rotor permanent magnet body (3), stator (4), is arranged on stator (4) periphery and outwards gives prominence to;
Motor outer rotor (1) is rotationally connected through bearing (9) and back shaft (10), and external rotor permanent magnet body (3) is along the circumferential direction equally spaced to embed on rotor yoke (2); Stator (4) adopts the open slot stator structure, and stator (4) offers stator slot (8), and winding (7) places stator slot (8); Stator permanent magnet (6) along the circumferential direction embeds between two adjacent stator tooths, and stator (4) is fixing through back shaft (10); Stator (4) and external rotor (1) are mirror image in the axial direction, and external rotor (1) is in the outside, and stator (4) is in the inboard.
2. desk permanent-magnet vernier motor according to claim 1 is characterized in that: between external rotor (1) and the stator (4) air gap is arranged.
3. desk permanent-magnet vernier motor according to claim 1; It is characterized in that: on external rotor (1) one side all external rotor permanent magnet body (3) polarity identical and with opposite side on external rotor permanent magnet body (3) polarity opposite, rotor permanent magnet (3) and stator permanent magnet (6) magnetizing direction that is positioned at the same side simultaneously is in the same way; Rotor permanent magnet (3) and stator permanent magnet (6) magnetizing direction are axial.
4. desk permanent-magnet vernier motor according to claim 1 is characterized in that: the material of external rotor yoke (2) and stator (4) is silicon steel.
5. desk permanent-magnet vernier motor according to claim 1 is characterized in that: the number n of stator tooth (5) on said stator (4) one sides
sEqual the number n of homonymy external rotor permanent magnet body (3)
rWith stator one side field pole logarithm n
pSum.
6. desk permanent-magnet vernier 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 true CN102570751A (en) | 2012-07-11 |
| CN102570751B CN102570751B (en) | 2014-07-09 |
Family
ID=46415413
Family Applications (1)
| 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109195861A (en) * | 2016-05-25 | 2019-01-11 | Zf腓特烈斯哈芬股份公司 | The application of diverter with adjustment device and the diverter with adjustment device |
Citations (4)
| 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 |
| US20080129125A1 (en) * | 2006-11-02 | 2008-06-05 | Gianluca Pagani | Flux-reversal linear 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 |
-
2012
- 2012-01-17 CN CN201210014193.7A patent/CN102570751B/en not_active Expired - Fee Related
Patent Citations (4)
| 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 |
| US20080129125A1 (en) * | 2006-11-02 | 2008-06-05 | Gianluca Pagani | Flux-reversal linear 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109195861A (en) * | 2016-05-25 | 2019-01-11 | Zf腓特烈斯哈芬股份公司 | The application of diverter with adjustment device and the diverter with adjustment device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102570751B (en) | 2014-07-09 |
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