CN204408154U - A kind of double winding modular stator permanent-magnet type magnetic flux switches bearing-free motor - Google Patents
A kind of double winding modular stator permanent-magnet type magnetic flux switches bearing-free motor Download PDFInfo
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- CN204408154U CN204408154U CN201520146862.5U CN201520146862U CN204408154U CN 204408154 U CN204408154 U CN 204408154U CN 201520146862 U CN201520146862 U CN 201520146862U CN 204408154 U CN204408154 U CN 204408154U
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Abstract
The utility model discloses a kind of double winding modular stator permanent-magnet type magnetic flux and switch bearing-free motor, comprise rotor core, stator core, 12 armature winding coils, 12 suspending windings coils; Described stator core is made up of 12 E shape magnetic conductive iron and 12 permanent magnet alternative splicings, the tooth protruded in the middle of described E shape magnetic conductive iron is fault-tolerant teeth, for suspending windings and armature winding coil provide loop to achieve magnetic circuit decoupling zero, described permanent magnet is arranged between adjacent two E shape magnetic conductive iron, and adopting cutting orientation magnetizing, described armature winding snare is contained on permanent magnet, for generation of machine torque, described suspending windings coil, across in fault-tolerant teeth both sides, is used for producing suspending power.
Description
Technical field
The utility model relates to a kind of bearing-free motor, particularly relates to a kind of double winding modular stator permanent-magnet type magnetic flux and switches bearing-free motor, belong to motor manufacturing control field.
Background technology
Along with developing rapidly of science and technology, and the needs in the field such as military hi-tech field industrial production, Aero-Space, Medical Devices, life, at a high speed, super high speed motor had more and more urgent demand.But the high-speed cruising of common electric machine inherently increases rotor operation friction resistance, exacerbates mechanical oscillation and noise, accelerate bearing wear speed, also cause heating in winding temperature to raise simultaneously.Traditional mechanical bearing needs daily lubrication and maintenance, and the application such as, space poisonous at some cannot effectively be safeguarded at all, and although the high-speed electric expreess locomotive adopting air supporting or liquid bearing to support reduces the friction between rotor and bearing, but need to adopt special air supporting and liquid floating apparatus, cause control system huge, cost increases, until the magnetic suspension bearing that the sixties in 19th century proposes can effectively solve above great number of issues, but largely limit its application due to reasons such as cost of manufacture are large, volume is large.In order to address these problems, domestic and international scientific research personnel increases this area research, until 1996, the N. Barletta of Zurich, SUI federal Institute of Technology is creationary develops bearing-free permanent magnet thin-sheet motor experimental prototype, this electric machine structure is simple, greatly can reduce the expense of control system, make bearing-free motor technology become possibility in the application of military hi-tech field industrial production, Aero-Space, the extraordinary transmission field of Medical Devices.
Bearing-free motor is the New-type electric machine integrating rotary actuation and magnetic bearing function, and it not only overcomes many limitations of magnetic bearing motor, also has that critical whirling speed is high, volume is little, rotating speed is high, precision is high, the life-span is long, the advantages such as power output is large.Make a general survey of the document delivered both at home and abroad, adopt the motor type of bearing-free technology to mainly contain asynchronous machine, reluctance motor and permagnetic synchronous motor (all referring to that permanent magnet is placed in the rotor permanent magnet formula structure of rotor, lower same).Stator permanent-magnet flux switch motor (Permanent Magnet Flux-Switching Machine, PMFS) flux-reversal magneto (Flux-Reversal Permanent Magnet Machine had both been possessed, and doubly salient permanent magnet motor (Doubly-Salient Permanent Magnet FRPM), DSPM) structure is simple, and possess again rotor permanent magnet type empty load of motor magnetic linkage is ambipolar advantage simultaneously.There is poly-magnetic effect, air-gap field can be designed very large (can 2.5T be reached), cause it under the condition that stator outer diameter is identical, torque and power can higher than above two kinds of stator permanent magnetic type electrics, the large permanent magnetic field of power density and armature reacting field say it is in parallel from magnetic circuit, make permanent magnet have very strong anti-demagnetization capability.Therefore stator permanent magnetic type bearing-free motor will be a good research direction undoubtedly.
Bearing-free switch reluctance motor structure is simple, and robustness is good, salient pole stator structure, and winding is concentratred winding, without winding on rotor.Manufacture easy to maintenance, high-speed adaptability is good.Loss is less, and efficiency is higher; There is not excitation and slip loss in rotor.Good speed adjustment features; many manufactures of its controllable parameter and easy to maintenance; be applicable to the adverse circumstances such as high temperature; but the power density of bearing-free switch reluctance motor and efficiency are difficult to further raising; stator permanent-magnet flux switch motor has that structure is simple, high power density, high efficiency by contrast; and permanent magnet is placed on motor stator, does not need protective device thus to have good thermal diffusivity and mechanical firmness.
To sum up, stator permanent magnetic type magnetic flux switches bearing-free motor, there is bearing-free switch reluctance motor and stator permanent-magnet motor advantage, namely rotor structure is simply applicable to running up, reliability is high, torque output capability is strong, torque density is large, and permanent magnet is placed in stator easy heat radiation with firm, the shortcoming overcoming conventional rotors permanent-magnetic electric machine has very high theoretical significance and practical value.
Utility model content
Technical problem to be solved in the utility model provides a kind of double winding modular stator permanent-magnet type magnetic flux for the deficiency of background technology to switch bearing-free motor.
The utility model is for solving the problems of the technologies described above by the following technical solutions:
A kind of double winding modular stator permanent-magnet type magnetic flux switches bearing-free motor, comprises rotor core, stator core, 12 armature winding coils, 12 suspending windings coils; Described stator core is made up of 12 E shape magnetic conductive iron and 12 permanent magnet alternative splicings, the tooth protruded in the middle of described E shape magnetic conductive iron is fault-tolerant teeth, for suspending windings and armature winding coil provide loop to achieve magnetic circuit decoupling zero, described armature winding snare is contained in on its one to one permanent magnet, for generation of machine torque; Described suspending windings coil across with its fault-tolerant teeth both sides one to one, be used for producing suspending power.
Switch the further preferred version of bearing-free motor as a kind of double winding of the utility model modular stator permanent-magnet type magnetic flux, described stator core and rotor core are salient-pole structure.
Switch the further preferred version of bearing-free motor as a kind of double winding of the utility model modular stator permanent-magnet type magnetic flux, described permanent magnet adopts and alternately magnetizes, and namely adjacent permanent magnet magnetizing direction is contrary.
Switch the further preferred version of bearing-free motor as a kind of double winding of the utility model modular stator permanent-magnet type magnetic flux, described armature winding coil and suspending windings coil all adopt centralized distributed winding, are evenly distributed in permanent magnet and fault-tolerant teeth both sides.
The further preferred version of bearing-free motor is switched as a kind of double winding of the utility model modular stator permanent-magnet type magnetic flux, in 12 armature winding coils, homophase armature winding coil is together in series mutually, and out of phase armature winding coil is locus mutual deviation 30 degree.
The utility model adopts above technical scheme compared with prior art, has following technique effect:
1. the utility model magnet be placed in stator be easy to heat radiation, there is poly-magnetic effect, air-gap field can be designed very large, and torque and power large.
2. the utility model stator core is made up of the E shape magnetic conductive iron comprising fault-tolerant teeth, and fault-tolerant teeth plays the alternate physical isolation effect of motor, realizes the magnetic circuit decoupling zero of armature winding and suspending windings.
3. the armature winding coil in the utility model motor and suspending windings coil double winding all adopt centralized winding, and end is shorter, loss is lower, efficiency is high, and reduces motor axial length, improves power density.
4. on the utility model rotor not only without winding but also without permanent magnet, have that structure is simple, rotor is firm, power density is high, efficiency advantages of higher.
5. the utility model rotor adopts skewed slot to make to solve back-emf non-sine problem.
6. the utility model can realize motor weak magnetics detect when running up.
7. the utility model structurally remains the good advantage of bearing-free switch reluctance motor compact conformation, simple, fault freedom and robust performance.
Accompanying drawing explanation
Fig. 1 is the structural representation that a kind of double winding modular stator permanent-magnet type magnetic flux that the utility model proposes switches bearing-free motor;
Fig. 2 is that the utility model bearing-free motor produces X-axis suspending power schematic diagram.
Number in the figure is specific as follows: 1-stator core, 2-fault-tolerant teeth, 3-permanent magnet, P-suspending windings coil, 4-armature winding coil, 5-rotor core.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail:
As shown in Figure 1, in figure, Px1.Px2.Px3.Px4.Px5.Px6 is suspending windings coil, 4 is armature winding coil, a kind of double winding modular stator permanent-magnet type magnetic flux switches bearing-free motor, comprises rotor core 1, stator core 5,12 armature winding coils 4,12 suspending windings coil P; Described stator core is made up of 12 E shape magnetic conductive iron 5 and 12 permanent magnet 3 alternative splicings, the tooth protruded in the middle of described E shape magnetic conductive iron is fault-tolerant teeth 2, for suspending windings coil P and armature winding coil 4 provide loop to achieve magnetic circuit decoupling zero, described armature winding coil 4 be sleeved on its one to one permanent magnet on for generation of machine torque, described suspending windings coil P is across being used for producing suspending power in fault-tolerant teeth 2 both sides one to one with it.
Wherein, described stator core and rotor core are salient-pole structure, described permanent magnet adopts and alternately magnetizes, namely adjacent permanent magnet magnetizing direction is contrary, described permanent magnet adopts NdFeB material, described armature winding coil and suspending windings coil all adopt centralized distributed winding, be evenly distributed in permanent magnet and fault-tolerant teeth both sides, suspending windings coil is around on fault-tolerant teeth, the degree of freedom in control one direction and every three cover windings are chained together, described stator core is that permeability magnetic material is made, homophase armature winding coil is together in series mutually, out of phase armature winding coil is locus mutual deviation 30 degree.
The present utility model switches bearing-free motor for 12/14 pole three-phase double winding modular stator permanent-magnet type magnetic flux, and its figure mono-is structural representation.This motor stator is formed by 12 E shape stator core unit 1 and 12 permanent magnet 3 alternative splicings, and namely permanent magnet is embedded between the stator core of two pieces of E shapes, permanent magnet cutting orientation magnetizing, and permanent magnet 3 is contrary with adjacent permanent magnet magnetizing direction.Protrude in the middle of E shape stator core unit for fault-tolerant teeth achieves magnetic circuit decoupling zero between each phase of armature.Threephase armature winding coil is contained on permanent magnet, and differ on locus between each phase, suspending windings coil is contained on fault-tolerant teeth, and all windings all adopt centralized winding.Rotor core structure is double-salient-pole structure, and without any permanent magnet and winding coil, rotor teeth groove adopt skewed slot effectively can solve the not sinusoidal problem of back-emf curve.
Every mutually desirable unloaded permanent magnet flux linkage of stator permanent-magnet flux switch motor becomes double polarity sine to distribute, then cause the back electromotive force of winding internal induction, also be Sine distribution, according to the position of respective rotor, apply, with the identical sinusoidal armature supply of back-emf phase place, equidirectional electromagnetic torque will be obtained to every phase winding.
In order to produce more obvious suspending power to offset rotor gravity and to suppress rotor eccentricity, 3 cover suspending windings are respectively loaded in X-axis positive and negative direction, i.e. winding Px1.Px2.Px3 and winding Px4.Px5.Px6, the winding in positive and negative direction is symmetrical on locus, and every three cover windings in series are got up, and Y-axis in like manner.
The original rotating magnetic field balance of motor has been broken in introduction due to suspending windings coil, and a certain regional magnetic field of motor gas-gap is strengthened, and symmetrical air-gap field weakens, the Maxwell force of generation points to a side of magnetic field enhancing.The such as motor gas-gap magnetic flux mainly permanent magnet generation when empty load of motor, motor each symmetrical region magnetic flux is that balance is equal, pass into electric current owing to giving suspending windings Px1.Px2.Px3 and produce magnetic flux with the permanent magnet magnetic line of force from N pole to S pole trend in the same way, close along the path that magnetic resistance is minimum according to " magnetic resistance minimum principle " magnetic flux, namely it enters air gap from fault-tolerant teeth.
As shown in Figure 2, solid black lines-permanent magnet flux, black dotted lines-suspension magnetic flux, air gap 2 place magnetic flux density on the right side of rotor is caused to be strengthened, and pass into electric current generation with the permanent magnet magnetic line of force from N pole to S pole trend oppositely to suspending windings Px4.Px5.Px6, on the left of rotor, air gap 1 place magnetic flux density reduces, thus produces the radial suspension force along X-axis positive direction, makes rotor offset rotor gravity to the skew of X-axis positive direction or suppress rotor eccentricity; As passed to rightabout electric current, then can produce a radial suspension force along X-axis negative direction.Pass into levitating current in like manner to Y-axis positive direction and produce magnetic flux, cause air gap flux density on the upside of rotor to strengthen, corresponding downside air gap flux density weakens.Magnetic flux magnetic close direction during permanent magnet independent role, the magnetic flux density direction that the suspending windings electric current passing into separately x-axis direction produces.
Claims (5)
1. double winding modular stator permanent-magnet type magnetic flux switches a bearing-free motor, comprises rotor core, stator core, 12 armature winding coils, 12 suspending windings coils; Described stator core is made up of 12 E shape magnetic conductive iron and 12 permanent magnet alternative splicings, the tooth protruded in the middle of described E shape magnetic conductive iron is fault-tolerant teeth, for suspending windings and armature winding coil provide loop to achieve magnetic circuit decoupling zero, it is characterized in that: described armature winding snare is contained in on its one to one permanent magnet, for generation of machine torque; Described suspending windings coil across with its fault-tolerant teeth both sides one to one, be used for producing suspending power.
2. a kind of double winding modular stator permanent-magnet type magnetic flux according to claim 1 switches bearing-free motor, it is characterized in that: described stator core and rotor core are salient-pole structure.
3. a kind of double winding modular stator permanent-magnet type magnetic flux according to claim 1 switches bearing-free motor, it is characterized in that: described permanent magnet adopts and alternately magnetizes, and namely adjacent permanent magnet magnetizing direction is contrary.
4. a kind of double winding modular stator permanent-magnet type magnetic flux according to claim 1 switches bearing-free motor, it is characterized in that: described armature winding coil and suspending windings coil all adopt centralized distributed winding, be evenly distributed in permanent magnet and fault-tolerant teeth both sides.
5. a kind of double winding modular stator permanent-magnet type magnetic flux according to claim 1 switches bearing-free motor, it is characterized in that: in 12 armature winding coils, homophase armature winding coil is together in series mutually, and out of phase armature winding coil is locus mutual deviation 30 degree.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520146862.5U CN204408154U (en) | 2015-03-13 | 2015-03-13 | A kind of double winding modular stator permanent-magnet type magnetic flux switches bearing-free motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520146862.5U CN204408154U (en) | 2015-03-13 | 2015-03-13 | A kind of double winding modular stator permanent-magnet type magnetic flux switches bearing-free motor |
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| CN204408154U true CN204408154U (en) | 2015-06-17 |
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| CN201520146862.5U Expired - Fee Related CN204408154U (en) | 2015-03-13 | 2015-03-13 | A kind of double winding modular stator permanent-magnet type magnetic flux switches bearing-free motor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108206595A (en) * | 2016-12-20 | 2018-06-26 | 郑州宇通客车股份有限公司 | A kind of permanent magnet motor stator and magneto |
| CN109194076A (en) * | 2018-10-31 | 2019-01-11 | 山东理工大学 | A kind of electric car high reliability driving motor |
| CN109586537A (en) * | 2018-12-21 | 2019-04-05 | 南京航空航天大学 | A kind of the bearing-free double salient-pole electric machine and its control method of piecemeal rotor |
| CN110098707A (en) * | 2019-04-09 | 2019-08-06 | 浙江大学 | A kind of long magnetic teeth double-convex pole hybrid excitation motor |
-
2015
- 2015-03-13 CN CN201520146862.5U patent/CN204408154U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108206595A (en) * | 2016-12-20 | 2018-06-26 | 郑州宇通客车股份有限公司 | A kind of permanent magnet motor stator and magneto |
| CN108206595B (en) * | 2016-12-20 | 2023-08-11 | 宇通客车股份有限公司 | Permanent magnet motor |
| CN109194076A (en) * | 2018-10-31 | 2019-01-11 | 山东理工大学 | A kind of electric car high reliability driving motor |
| CN109586537A (en) * | 2018-12-21 | 2019-04-05 | 南京航空航天大学 | A kind of the bearing-free double salient-pole electric machine and its control method of piecemeal rotor |
| CN109586537B (en) * | 2018-12-21 | 2021-01-19 | 南京航空航天大学 | Bearingless doubly salient motor of segmented rotor and control method thereof |
| CN110098707A (en) * | 2019-04-09 | 2019-08-06 | 浙江大学 | A kind of long magnetic teeth double-convex pole hybrid excitation motor |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150617 Termination date: 20170313 |
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| CF01 | Termination of patent right due to non-payment of annual fee |