CN209329936U - Using the synchronous motor of permanent magnetism auxiliary cage barrier rotors - Google Patents
Using the synchronous motor of permanent magnetism auxiliary cage barrier rotors Download PDFInfo
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- CN209329936U CN209329936U CN201821549724.1U CN201821549724U CN209329936U CN 209329936 U CN209329936 U CN 209329936U CN 201821549724 U CN201821549724 U CN 201821549724U CN 209329936 U CN209329936 U CN 209329936U
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Abstract
Using the synchronous motor of permanent magnetism auxiliary cage barrier rotors, including shaft, the permanent magnetism on the outside of shaft assists cage barrier rotors, and permanent magnetism assists the stator and casing on the outside of cage barrier rotors, it is characterised in that: three-phase symmetric winding is embedded on stator；It is connected, is connected between permanent magnetism auxiliary cage barrier rotors and steel bushing by dovetail groove, steel bushing and shaft are fixed together by positioning pin by steel bushing between shaft and permanent magnetism auxiliary cage barrier rotors；Rotor, which is used, assists cage barrier rotors along the permanent magnetism that axial direction is overrided to form, and adding at non-magnetic layer using width and magnetizing direction is in the incorgruous charging permanent magnet of piecemeal of sinusoidal variations and wide, the close narrow not wide short circuit cage item of shaft close to air gap.This kind of novel permanent magnetic auxiliary cage barrier rotors cause the variation of magnetic barrier saturation of magnetic path using magnetic field of permanent magnet, and then improve rotor coupling ability, promoted motor torque density, have have excellent performance, structure novel, simple process, low in cost, high mechanical strength, significant advantage reliable for operation, convenient for industrialization etc..
Description
Technical field
The utility model relates to a kind of rotors using the synchronous motor of permanent magnetism assisting cage barrier structure.Belong to motor field to ask
Topic.
Background technique
Using the embedded rotor magneto of rare earth material by high power density and torque density, high efficiency, wider
Output-constant operation range, be applied widely in numerous areas.But rare-earth permanent magnet is expensive, resource is limited,
The lasting supply bottleneck of rare earth permanent-magnetic material is an outstanding problem.Academia and industry to using few rare earth, without rare earth forever
Magnetic and great interest is shown by the inexpensive magneto of representative of ferrite.The few rare earth of research and development/without rare earth permanent magnet
Motor has important theory significance and application value.
Synchronous magnetic resistance motor obtains fast development after nineteen nineties, and by salient pole than big, speed regulation property
Energy is excellent, high-efficient, can not use or be used only the advantages such as a small amount of low cost permanent magnets, shows huge application prospect, quilt
It is considered few rare earth of a kind of great industrial potential/without rare-earth electric motor.However (rotor does not have any encourage to pure synchronous magnetic resistance motor
Magnetic), in order to obtain biggish electromagnetic torque, needs stator side to provide biggish exciting current, lead to the efficiency and power of motor
Factor is lower.To solve this problem, researcher proposes a kind of permanent magnetism auxiliary reluctance synchronous machine, i.e., is embedded in permanent magnet
Rotor magnetic hinders to provide permanent magnet flux, improves the power factor and torque density of motor.In addition, the introduction of permanent magnet helps to turn
Sub- connecting bridge saturation, and then improve saliency (difference of d-axis inductance and axis inductor numerical value).To obtain biggish convex grey subset,
The rotor of permanent magnetism auxiliary reluctance-synchronous machine is typically designed to multilayer magnetic barrier structure.But there are still torque densities for this motor
With the deficiencies of power factor is relatively low, magnetic field saturation is serious, d-q axle inductance degree of coupling is high in high-power situation, its work is limited
The popularization of industryization application.It improves therefore, it is necessary to be optimized to the rotor of this kind of motor and then promotes answering for the type motor
With with popularization.
Utility model content
Purpose of utility model: the utility model provides the synchronous motor using permanent magnetism auxiliary cage barrier rotors, its object is to
Manufacture a kind of not only easy to process is proposed, but also rotor with salient pole rate can be increased, to improve motor torque density and improve stable state
Hinder rotor structure with the novel permanent magnetic assisting cage of dynamic property.
Technical solution: the utility model uses following technical scheme:
Permanent magnetism assists cage barrier rotors synchronous motor, including shaft, and the permanent magnetism on the outside of shaft assists cage barrier rotors, permanent magnetism auxiliary
Stator and casing on the outside of cage barrier rotors, it is characterised in that: three-phase symmetric winding is embedded on stator；Shaft and permanent magnetism assisting cage hinder
It is connected, is connected between permanent magnetism auxiliary cage barrier rotors and steel bushing by dovetail groove, steel bushing passes through with shaft by steel bushing between rotor
Positioning pin is fixed together；Rotor, which is used, assists cage barrier rotors along the permanent magnetism that axial direction is overrided to form, and adds at non-magnetic layer
It is wide in the incorgruous charging permanent magnet of piecemeal of sinusoidal variations and close to air gap using width and magnetizing direction, differ close to shaft is narrow
Wide short circuit cage item.
The permanent magnetism auxiliary cage barrier rotors share NrA salient pole, each salient pole are by being laminated with silicon steel material along axial direction
Made of lamination constitute.
The lamination is equipped with magnetic layer, and there are non-magnetic layers between adjacent two magnetic layer, and according to magnetic field modulation
The influence of ability selects the width ratio between suitable magnetic layer and non-magnetic layer, passes through the connected shape of dowel between magnetic layer
At an entirety.
The non-magnetic layer of the permanent magnetism auxiliary reluctance rotor uses U-shaped.
The two sides of the non-magnetic layer of each U-shaped embed the short circuit cage item of different tip lengths.
The short circuit cage item use it is wide close to air gap, close to the narrow not wide structure of shaft, be placed on tangential trapezoidal non-
In magnetic layer, it is concentric to form multiple groups with the symmetrical two conductors connection of permanent magnetism assisting cage barrier rotor axis for the end of short circuit cage item
Loop checking installation.
According to embedding, the piecemeal for being in sinusoidal variations using width and magnetizing direction is incorgruous to be filled for the non-magnetic layer bottom of each U-shaped
Magnetic permanent magnet.
The beneficial effects of the utility model are:
The rotor of this kind of motor axial lamination magnetic hinder structure on the basis of, at non-magnetic layer add auxiliary permanent magnet and
Short circuit cage item can effectively reduce Gas-gap Magnetic Field Resonance Wave and loss while further increasing motor torque density, improve motor
Stable state and dynamic operation performance；Permanent magnetism auxiliary cage barrier rotors silicon steel sheet is laminated along axial direction, it is possible to reduce the whirlpool in rotor core
Stream loss, improves electric efficiency；Using U-shaped magnetic barrier equivalent to increase the air gap in motor quadrature axis, so that quadrature-axis reluctance improves
And being basically unchanged for d-axis direction, be conducive to improve magnetic resistance of motor torque；The added width in non-magnetic layer bottom and magnetizing direction
In the permanent magnet of the incorgruous arrangement of magnetizing of the piecemeal of sinusoidal variations, the permanent magnetic field at air gap can not only be made more to collect
In, so that motor gas-gap magnetic flux distribution is more leveled off to Sine distribution, harmonic content is few, and flux density distribution is more uniform, may be used also
To further enhance rotor saliency, and then promote electromagnetic torque fan-out capability and permanent magnet utilization rate；And permanent magnetism
The offset in body magnetic field can increase the verticality in the d-q axis magnetic field of rotor-side, reduce magnetic field locally full degree；Short circuit cage item is added
Be added in the non-magnetic layer two sides of U-shaped, not only can more specification magnetic flux path, so that flux density is evenly distributed, and motor can be improved
Dynamic response capability.This kind of novel permanent magnetic auxiliary cage barrier rotors cause the change of magnetic barrier saturation of magnetic path using magnetic field of permanent magnet
Change, so improve rotor coupling ability, promoted motor torque density, have have excellent performance, structure novel, simple process, cost
Cheap, high mechanical strength, significant advantage reliable for operation, convenient for industrialization etc..
Detailed description of the invention
It is described in detail the utility model with reference to the accompanying drawings and detailed description.
Fig. 1 is the stator structure schematic diagram of the utility model motor；
Fig. 2 is that the permanent magnetism assisting cage of the utility model motor hinders rotor structure schematic diagram；
Fig. 3 is the auxiliary permanent magnet schematic diagram of the utility model motor；
Fig. 4 is the short circuit cage bar schematic diagram of the utility model motor
In figure: 1. casings, 2. stators, 3. stator winding, 4. permanent magnetism auxiliary cage barrier rotors, 5. magnetic layers, 6. non-magnetic
Layer, 7. permanent magnets, 8. short circuit cage items, 9. dovetail grooves, 10. steel bushings, 11. shafts, 12. positioning pins, 13. dowels.
Specific embodiment: the utility model is specifically described with reference to the accompanying drawing:
Permanent magnetism assists cage barrier rotors synchronous motor, including shaft 11, and the permanent magnetism on the outside of shaft assists cage barrier rotors 4, permanent magnetism
Assist the stator 2 and casing 1 on the outside of cage barrier rotors, it is characterised in that: three-phase symmetrical stator winding 3 is embedded on stator；Shaft 11
It is connect between permanent magnetism auxiliary cage barrier rotors 4 by steel bushing 10, passes through dovetail groove between permanent magnetism auxiliary cage barrier rotors 4 and steel bushing 10
It is connected, steel bushing 10 is fixed together with shaft 11 by positioning pin 12；Permanent magnetism auxiliary cage barrier rotors 4 are used to be overrided to form along axial direction
Permanent magnetism assist cage barrier rotors, lamination is equipped with magnetic layer 5, and magnetic layer uses trapezium structure, stays between two neighboring magnetic layer 5
There is a non-magnetic layer 6, permanent magnetism assists the non-magnetic layer 6 of reluctance rotor to use U-shaped structure, cuts in the U-shaped structure of non-magnetic layer 6
To that is, incorgruous charging permanent magnet 7 is added in U-shaped structure bottom.
It is in the incorgruous charging permanent magnet 7 of piecemeal of sinusoidal variations that incorgruous charging permanent magnet 7, which uses width and magnetizing direction, two
Short circuit cage item 8 is embedded in the non-magnetic layer 6 of side.
The rotor 4 using silicon steel material along axial direction laminate and made of lamination；According to magnetic field modulation ability
It influences to select the width ratio between suitable magnetic layer 5 and non-magnetic layer 6, is connected between magnetic layer by dowel 13 and is formed
One entirety.
The two sides of each non-magnetic layer 6 of U-shaped embed the short circuit cage item 8 of different tip lengths.
The short circuit cage item 8 uses not wide structure, is exactly that short circuit cage item 7 on every layer is not wide, i.e., close to air gap it is wide,
Close to the narrow not wide structure of shaft, it is placed in the trapezoidal non-magnetic layer of rotor axis two sides, the end of short circuit cage item 8 is with forever
Magnetic assists the monosymmetric conductor connection of 4 axis of cage barrier rotors, forms multiple groups annular concentric circuit.As shown in figure 4, for example, will
After also connecting between connection and lower end between the upper end of short circuit cage item 9 in same non-magnetic layer, loop checking installation is formed,
It is concentric loop checking installation between loop checking installation on inside and outside adjacent non-magnetic layer.
Fig. 1 is the stator structure schematic diagram of the utility model motor, and stator 2 is placed in casing 1.2 inner surface of stator is equal
Even fluting embeds three-phase symmetrical stator winding 3 in slot, multi-layer winding, mutually insulated between every layer of winding is embedded in each slot.It is fixed
Sub- winding 3 is all made of the double-deck short distance Distributed Winding, to improve motor powered gesture and magnetomotive waveform, reduces harmonic content,
Reduce the aberration rate of output voltage and electric current.
Fig. 2 is that the permanent magnetism assisting cage of the utility model motor hinders rotor structure schematic diagram, and rotor 4 is located at fixed shown in Fig. 1
Inside son 2.The permanent magnetism assisting cage barrier rotor pack is in axial direction overrided to form by silicon steel sheet, and it is auxiliary to can reduce permanent magnetism in this way
The eddy-current loss in cage barrier rotors 4 is helped, the efficiency of motor is improved.Permanent magnetism assisting cage hinders rotor pack and passes through dovetail groove 9 and steel bushing
10 are connected, and steel bushing 10 is fixed together by positioning pin 12 with shaft 11, so that permanent magnetism assists cage barrier rotors 4 and turns
Axis 11 forms one.In figure by taking 6 pole motors as an example, permanent magnetism auxiliary cage barrier rotors are equipped with 6 salient poles in total, are provided on salient pole surface
Multiple dovetail grooves embed more conductors in each dovetail groove and form short circuit cage item 8, and the dovetail groove opened up can make permanent magnetism assisting cage
Barrier rotor 4 on form several magnetic layers 5, due to magnetic layer 5 width on rotor coupling ability influence less, in order to just with add
The width of work, each magnetic layer 5 can be equal, and the width ratio between each magnetic layer 5 and non-magnetic layer 6 can be equal, this
When magnetic layer 5 in homogeneous thickness will be evenly spaced on 6 rotor with salient pole with non-magnetic layer 6.To make each interval point
The magnetic layer 5 of cloth connects into an entirety, is connected between each magnetic layer 5 by dowel 13, dowel 13 should ensure that enough
Mechanical strength.Using magnetic barrier rotor with salient pole middle line as symmetry axis, permanent magnetism auxiliary 4 axis two sides of cage barrier rotors open up multiple groups it is trapezoidal every
Magnetosphere will combine the non-magnetic layer 6 to form multiple groups U-shaped every magnetosphere, to also be formed with the dovetail groove for embedding short circuit cage item 8 respectively
Multiple groups U-shaped magnetic layer 5.
Fig. 3 is the auxiliary permanent magnet schematic diagram of the utility model motor, is embedded at the non-magnetic layer bottom of same rotor with salient pole U-shaped
For the permanent magnet 7 in portion due to the limitation of non-magnetic thickness degree, thickness is determining but can be with width etc., and is pair with rotor with salient pole middle line
Claim axis.Permanent magnet 7 should be interference fitted with non-magnetic layer 6, to prevent from throwing away permanent magnet in motor rotary course.By permanent magnet 7
The torque expression formula for embedding the permanent magnetism auxiliary reluctance motor formed after embedding in non-magnetic 6 bottom of layer of each U-shaped is as shown in formula 1,
By formula it is found that the auxiliary permanent magnet 7 of addition will increase the permanent-magnet torque of motor, to improve the torque density of motor.Forever
Permanent magnet in the arrangement mode of sinusoidal variations, i.e., is divided into width not equal permanent magnet blocks using width and magnetizing direction by magnet 7,
Each piece of permanent magnet magnetizing direction magnetizes according to the direction that produced sinusoidal magnetic field needs, and the purpose is to make at air gap forever
Magnetic magnetic field is more concentrated, and improves the convex grey subset of motor, and then promote electromagnetic torque fan-out capability and permanent magnetism utilization rate；Meanwhile no
Same magnetizing direction, different in width permanent magnet motor gas-gap magnetic flux distribution can be made to be more nearly sine, in addition, permanent magnet
The offset in magnetic field can also increase the verticality in the d-q axis magnetic field of rotor-side, reduce magnetic field locally full degree, and lead close to non-
The permanent magnet 7 at magnetosphere edge has stronger anti-degaussing ability.
In formula, p is motor number of pole-pairs, ψfFor the magnetic linkage that permanent magnet generates, LdWith LqRespectively stator is straight, axis inductor, α
For current phasor isWith d axle clamp angle.
Fig. 4 is the short circuit cage bar schematic diagram of the utility model motor, embeds the short circuit cage in non-magnetic 6 two sides of layer of each U-shaped
Item 8 connects into loop checking installation by end, and loop checking installation group number should be less than or be equal to the non-magnetic number of plies, i.e., can in non-magnetic layer 6
Partly or entirely to embed short circuit cage item 8.The short circuit cage item 8 embedded can increase the quadrature-axis reluctance of rotor, reduce the straight of rotor
Axis magnetic resistance, so that the magnetic flux path more in specification rotor, improves rotor convex grey subset, the magnetic resistance for promoting motor turns
Square.Meanwhile added short circuit cage item 8 is similar to the damping cage of magneto, after cage item is added, the raising of motor load capacity,
Output torque increase, torque pulsation reduction, dynamic characteristic are improved, and the runnability of motor is significantly improved.It is non-magnetic
It is more than or equal to the non-magnetic slice width degree close to shaft close to the non-magnetic slice width degree of air gap in layer 6, even if non-magnetic layer shape
At trapezoidal groove profile, its purpose is to keep current distribution is uneven in short circuit cage item 8 caused by faradic kelvin effect even
Influence reduce；The cage number of plies in non-magnetic layer 6 can be single layer or multilayer, between each layer, between cage item and rotor
Mutually insulated, cage item are joined together to form circuit by end, and the purpose is to reduce faradic kelvin effect in cage item
Influence, reduce the loss of motor, improve efficiency, at the same can improve motor gas-gap flux density distribution, so that air gap is more leveled off to
Sine further increases the coupling ability of permanent magnetism assisting cage barrier rotor.
In conclusion the permanent magnetism auxiliary cage barrier rotors that utility model proposes can significantly increase the coupling ability of rotor, no
The torque density that motor only can be improved enhances the stable state and dynamic characteristic of motor, and has structure novel, low in cost,
The advantages that convenient for industrialization.
Claims (5)
1. assisting the synchronous motor of cage barrier rotors, including shaft (11) using permanent magnetism, the permanent magnetism on the outside of shaft assists cage barrier rotors
(4), the stator (2) and casing (1) on the outside of permanent magnetism auxiliary cage barrier rotors, it is characterised in that: three-phase symmetrical stator is embedded on stator
Winding (3)；It is connect between shaft (11) and permanent magnetism auxiliary cage barrier rotors (4) by steel bushing (10), permanent magnetism assists cage barrier rotors (4)
It is connected between steel bushing (10) by dovetail groove, steel bushing (10) is fixed together with shaft (11) by positioning pin (12)；Permanent magnetism
Auxiliary cage barrier rotors (4) assists cage barrier rotors using the permanent magnetism being overrided to form along axial direction, and lamination is equipped with magnetic layer (5), magnetic conduction
Layer uses trapezium structure, and there are non-magnetic layer (6) between two neighboring magnetic layer (5), permanent magnetism assists the non-magnetic of reluctance rotor
Layer (6) uses U-shaped structure, non-magnetic layer (6) U-shaped structure it is tangential, i.e., incorgruous charging permanent magnet is added in U-shaped structure bottom
(7), short circuit cage item (8) are embedded in the non-magnetic layer (6) of two sides.
2. according to claim 1 using the synchronous motor of permanent magnetism auxiliary cage barrier rotors, it is characterised in that: incorgruous magnetizing permanent magnetism
Body (7) uses width and magnetizing direction is in the incorgruous charging permanent magnet of piecemeal (7) of sinusoidal variations.
3. according to claim 1 using the synchronous motor of permanent magnetism auxiliary cage barrier rotors, it is characterised in that: the rotor (4)
Using silicon steel material along axial direction laminate and made of lamination；Suitable magnetic conduction is selected according to the influence to magnetic field modulation ability
Width ratio between layer (5) and non-magnetic layer (6) passes through one entirety of dowel (13) connected formation between magnetic layer.
4. according to claim 1 using the synchronous motor of permanent magnetism auxiliary cage barrier rotors, it is characterised in that: each U-shaped is non-magnetic
The two sides of layer (6) embed the short circuit cage item (8) of different tip lengths.
5. according to claim 1 using the synchronous motor of permanent magnetism auxiliary cage barrier rotors, it is characterised in that: the short circuit cage item
(8) not wide structure, i.e. wide, the close narrow not wide structure of shaft close to air gap are used, the ladder of rotor axis two sides is placed on
In the non-magnetic layer of shape, the end of short circuit cage item (8) is with the monosymmetric conductor connection of permanent magnetism auxiliary cage barrier rotors (4) axis, shape
At multiple groups annular concentric circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821549724.1U CN209329936U (en) | 2018-09-21 | 2018-09-21 | Using the synchronous motor of permanent magnetism auxiliary cage barrier rotors |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821549724.1U CN209329936U (en) | 2018-09-21 | 2018-09-21 | Using the synchronous motor of permanent magnetism auxiliary cage barrier rotors |
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| Publication Number | Publication Date |
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| CN209329936U true CN209329936U (en) | 2019-08-30 |
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| CN201821549724.1U Active CN209329936U (en) | 2018-09-21 | 2018-09-21 | Using the synchronous motor of permanent magnetism auxiliary cage barrier rotors |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167502A (en) * | 2018-09-21 | 2019-01-08 | 沈阳工业大学 | A kind of permanent magnetism auxiliary cage barrier rotors synchronous motor |
| CN110879058A (en) * | 2019-11-14 | 2020-03-13 | 中国船舶重工集团公司第七0七研究所 | Closed-circuit magnetizing structure for stator magnetic steel of liquid floated gyroscope |
-
2018
- 2018-09-21 CN CN201821549724.1U patent/CN209329936U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167502A (en) * | 2018-09-21 | 2019-01-08 | 沈阳工业大学 | A kind of permanent magnetism auxiliary cage barrier rotors synchronous motor |
| CN109167502B (en) * | 2018-09-21 | 2023-08-01 | 沈阳工业大学 | Permanent magnet auxiliary cage barrier rotor synchronous motor |
| CN110879058A (en) * | 2019-11-14 | 2020-03-13 | 中国船舶重工集团公司第七0七研究所 | Closed-circuit magnetizing structure for stator magnetic steel of liquid floated gyroscope |
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