CN106712345A - Motor rotor and motor adopting the same - Google Patents
Motor rotor and motor adopting the same Download PDFInfo
- Publication number
- CN106712345A CN106712345A CN201610986714.3A CN201610986714A CN106712345A CN 106712345 A CN106712345 A CN 106712345A CN 201610986714 A CN201610986714 A CN 201610986714A CN 106712345 A CN106712345 A CN 106712345A
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- China
- Prior art keywords
- rotor
- motor
- linkage section
- stator
- arc linkage
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2746—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets arranged with the same polarity, e.g. consequent pole type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The invention relates to a motor rotor (5) and a motor adopting the motor rotor. The motor rotor (5) is provided with a plurality of grooves (2), which are in a radial radiation-shaped arrangement along the motor rotor (5). A plurality of permanent magnetic ferrites (3) are disposed in the above mentioned grooves. The outer surface of the motor rotor (5) is formed by non-circular surfaces formed by outer surfaces of a plurality of spline surfaces (11) and outer surfaces of arc-shaped connecting segments (12), which are arranged along the peripheral direction of the motor rotor (5) at intervals. When the motor rotor (5) is disposed in a motor stator iron core (4) having a circular inner surface, a gap between the outer surface of the motor rotor (5) and the stator iron core (4) of the motor stator is a non-uniform air gap.
Description
Technical field
The present invention relates to motor, in particular to a kind of rotor and the motor using the rotor.
Background technology
Motor, particularly permagnetic synchronous motor is widely used in the field of roller washing machine to drive the rotation of roller
Turn.Determine that the good and bad key point of such motor performance is the efficiency of the motor in two courses of work of washing of drum type washing machine and dehydration
And noise.With the raising of washing machine quality, require that motor reaches rotating speed very high during laundry machine dehydration, the motor turns
Speed is at least up to 10000r/min, may especially be up to 18000r/min, but be not intended to bring energy consumption and noise significantly
Improve.
Rotor main for the conventional motors of roller washing machine will include two types, and one kind is surface-type rotor magnetic circuit knot
Structure, another kind is built-in tangential rotors magnetic structure.
In surface-type rotor magnetic circuit structural, permanent magnet is pasted on rotor surface, and permanent magnet is integrally exposed in air gap, its
Just to stator field, because motor is in high speed weak magnetic, the electric current produced on stator coil becomes big, can cause naked in the magnetic field of generation
Easily there is demagnetization phenomenon in the permanent magnet being exposed in motor gas-gap, reduces the service life of motor.Additionally, in order to avoid motor is high
Permanent magnet comes off from rotor surface under rotating speed, it usually needs permanent magnet surfaces using steel bushing, protect on rotor surface forever
Magnet does not come off when motor runs at high speed from rotor core surface, and complex process, relatively costly, the meeting of this protection steel bushing
Bring the raising of motor overall complexity and cost.
Built-in tangential rotors magnetic structure solves above mentioned problem, but many defects itself are still present.Tradition
Built-in tangential rotors magnetic structure in, cogging torque is larger so that the torque pulsation of motor is larger, so that band is undesirable
Vibration and noise；Very big counter electromotive force harmonic content is produced during motor operation so that motor band when being run with rotating speed high
Carry out larger vibrating noise.
It is to disconnect in traditional solution, between adjacent rotor magnetic pole, and it is caused by modes such as injections
The filler of its non-magnet material is filled into the gap between adjacent rotor pole, for fixing each single permanent magnet.
Although this arrangement can to a certain extent reduce the leakage field phenomenon of rotor, during the high-speed cruising of motor, fill out
The injection molding body filled on adjacent pole open position bears torque higher, may fracture or break up, so as to motor internal
And the other parts of rotor/stator cause to damage, therefore more low intensive injection molding body is filled between the magnetic pole of disconnection
Arrangement can be run at high speed (for example：The dehydration of washing machine) motor belt motor carry out risk.
Accordingly, it would be desirable to it is a kind of efficiently, low noise, be suitable to the motor that runs at high speed for a long time.
The content of the invention
The present invention relates to a kind of rotor, wherein rotor has multiple grooves, the plurality of groove along rotor footpath
It is distributed to radial, and for multiple permanent-magnet ferrites to be received in the inner, also, the outer surface of rotor is by edge
It is non-circular that multiple spline surfaces of the circumferentially distributed and alternate arrangement of the rotor and the outer surface of arc linkage section are formed
Face so that when rotor is installed in the motor stator core that inner surface is circle, the outer surface of rotor and the motor
Gap between the stator core of stator is non-homogeneous air gap.
In an optional embodiment of rotor, the phase of the adjacent permanent-magnet ferrite in adjacent groove is received
Mutually towards surface there is identical polarity so that form magnetic pole between the adjacent ferrite of each pair.
In an optional embodiment of rotor, the outer surface of magnetic pole is spline surface, the adjacent magnetic of each two
Pole is connected by arc linkage section.
In an optional embodiment of rotor, spline surface on its center axis axisymmetricly, and
Air gap at its center axis and stator core between is minimal air gap δmin, minimal air gap δminWith spline surface and stator core
Between the ratio of air gap delta be cosine function of the rotor relative to the electrical angle β that the central axis of spline surface is turned over, its
Middle electrical angle β is rotor multiplying relative to the mechanical angle θ and number of pole-pairs P of motor that the central axis of spline surface is turned over
Product.
In an optional embodiment of rotor, the shape of spline surface meets formula：δmin/ δ=cos (β).
In an optional embodiment of rotor, rotor has circumferentially equally distributed eight of direction
Groove, and be respectively used to be received in eight permanent-magnet ferrites wherein, every spline surface on its center axis axisymmetricly,
And across mechanical angle θ0It is 31 °.
In an optional embodiment of rotor, form free between arc linkage section and permanent-magnet ferrite
Groove, injection molding body is injected into dead slot, and permanent-magnet ferrite is further secured in groove.
In an optional embodiment of rotor, the scope of the thickness of arc linkage section in 0.4mm to 0.6mm
Interior, wherein the thickness of arc linkage section is the difference between the exradius R2 and inner circle radius R1 of arc linkage section.
In an optional embodiment of rotor, the width of the width b1 less than permanent-magnet ferrite of arc linkage section
The width b1 of b2, wherein arc linkage section is the distance between arc linkage section and adjacent two tie points of spline surface.
In an optional embodiment of rotor, the height H1 of arc linkage section is not more than the summit of spline surface
With the axle center of rotor apart from H2, and more than the axle at the minimum point farthest away from its summit of spline surface with rotor
The heart apart from H3, the wherein height H1 of arc linkage section is the summit of arc linkage section and the distance in the axle center of rotor.
The invention further relates to a kind of motor, it is included in the rotor limited in foregoing any embodiment.
In an optional embodiment of motor, the motor also includes stator, and the inner surface of the stator core of stator is whole
Body is circular, and stator core includes Central Symmetry, the stator tooth that is circumferentially evenly arranged, the adjacent stator tooth of each two it
Between form groove, each groove be used for receive corresponding armature winding in the inner.
In an optional embodiment of motor, the folded thick L1s of the folded thick L2 less than rotor of stator core.
In an optional embodiment of motor, the ratio L2/L1 of the folded thick L2 of the stator core and folded thick L1 of rotor
In the range of 0.8 to 0.96.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, will simply be situated between to the accompanying drawing of embodiment below
Continue, it should be apparent that, drawings in the following description merely relate to some embodiments of the present invention, rather than limitation of the present invention.
Fig. 1 schematically shows the structure of motor stator according to embodiments of the present invention.
Fig. 2 schematically shows the front view of rotor according to an embodiment of the invention.
Show that half minimal air gap of smooth spline surface changes with the ratio of periphery air gap with electrical angle β in Fig. 3
Curve.
Fig. 4 is another diagram of the front view of rotor, shows that spline surface and linkage section turn relative to the motor
The size relationship of son.
Fig. 5 shows the sectional view of motor according to an embodiment of the invention, and wherein rotor 5 and stator 4 has been coupled to
Together.
Fig. 6 show with embodiments in accordance with the present invention optimization after rotor structure motor cogging torque with it is existing
The correlation curve of the experimental result of the cogging torque of the motor with conventional rotors magnetic structure in technology, where the dotted line signifies that
The curve that the cogging torque of the motor being not optimised is changed over time, and solid line then to represent that disclosure of the invention is carried out excellent
The curve that the cogging torque of the motor of change is changed over time.
Fig. 7 shows the back-emf and existing skill of the motor with the rotor structure after embodiments in accordance with the present invention optimization
The correlation curve of the experimental result of the back-emf of the motor with conventional rotors magnetic structure in art.Where the dotted line signifies that is not excellent
The curve that the back-emf of the motor of change is changed over time, and solid line then represents the electricity that disclosure of the invention is optimized
The curve that the back-emf of machine is changed over time.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme to the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is this hair
Bright a part of embodiment, rather than whole embodiments.Based on described embodiments of the invention, ordinary skill
The every other embodiment that personnel are obtained on the premise of without creative work, belongs to the scope of protection of the invention.
Unless otherwise defined, technical term used herein or scientific terminology should be in art of the present invention and have
The ordinary meaning that the personage of general technical ability is understood.Used in present patent application specification and claims " the
One ", " second " and similar word are not offered as any order, quantity or importance, and are used only to distinguish different
Part.Equally, the similar word such as " one " or " " does not indicate that quantity is limited yet, but expression has at least one.
Embodiments in accordance with the present invention, disclose a kind of permagnetic synchronous motor, are specifically adapted for washing machine drum driving.
Specifically, the motor includes：The rotor of built-in tangential magnetic structure and the stator structure coordinated with it, the rotor
The result that structure and rotor coordinate with stator can realize excellent motor performance so that be washed using the washing machine of the motor
Washing efficiency and dewatering efficiency can keep level higher, reduce loss, reduce noise and vibration, improve washing machine quality.
Fig. 1 schematically shows the structure of motor stator according to embodiments of the present invention.Specifically, as shown in figure 1,
The internal diameter 6 of the stator core 4 of the stator structure is rounded on the whole.The stator core 4 includes determining for multiple Central Symmetry arrangements
Sub- tooth 21, forms a groove 22 between two adjacent stator tooths 21, stator tooth 21 and groove 22 along stator core 4 week
To the alternate arrangement in direction.In the embodiment shown in fig. 1, the stator core 4 includes 12 stator tooths 21 and 12 of alternate arrangement
Individual groove 22；But in alternate embodiments, the quantity of stator tooth 21 and groove 22 can neatly be selected according to practical application.
Armature winding is filled with groove 22, the material of armature winding is preferably aluminum steel, to keep relatively low cost and good lead
Electrically；In alternate embodiments, the material of armature winding can according to specifically applying other selection, such as aluminium alloy,
Copper, copper alloy etc..
Fig. 2 schematically shows the front view of rotor 5 according to an embodiment of the invention.In fig. 2, permanent magnet
Oxysome 3 is embedded into a part of groove 2 of rotor 5, is being turned with structure and permanent-magnet ferrite 3 that rotor 5 is explicitly described
Arrangement in son 5.Specifically, the rotor 5 shown in Fig. 2 has circle on the whole and centrosymmetric structure.Turning
The circumferential direction of son 5 is evenly distributed with multiple grooves 2 along radial direction radial, for permanent-magnet ferrite 3 to be embedded,
Permanent-magnet ferrite 3 can be the multiple monolithics bulk permanent-magnet ferrite 3 matched with the shape of groove 12.In the implementation shown in Fig. 2
In example, rotor 5 includes 8 equally distributed grooves 2 along its circumferential direction, for accommodating 8 single permanent-magnet ferrites 3 (in Fig. 2
In only 5 permanent-magnet ferrites 2 be installed in the groove 2 of rotor 5, remaining 3 permanent-magnet ferrites are not mounted to the residue of rotor 5
Groove 2 in, for being clearly shown that the structure of groove 2)；But in alternate embodiments, the quantity of groove 2 and correspondingly embedding
The quantity for entering the permanent-magnet ferrite 3 in groove 2 can neatly be selected according to specifically applying.Additionally, groove 2 and permanent-magnet ferrite
3 shape is also not necessarily limited to square strip illustrated in fig. 2, but can also neatly select other shapes.
As shown in Fig. 2 the magnetizing direction of the adjacent permanent-magnet ferrite 3 in being embedded into adjacent groove 2 is opposite so that adjacent
The mutually facing surface of permanent-magnet ferrite 3 there is identical polarity, so as to form magnetic using the permeance of rotor material
Pole 1.Specifically, as shown in Fig. 2 the N poles and N poles of adjacent permanent-magnet ferrite 3 face each other, and the extremely mutual face of S poles and S
It is right.This arrangement causes that the magnetic field that the permanent-magnet ferrite 3 in groove 2 sends forms the closed-loop path of motor main field, can be with
Enhancing magnetic field.This rotor structures of Fig. 2 are also possible that permanent-magnet ferrite can bear bigger demagnetizing current, and are not easy to move back
Magnetic.
Between the adjacent magnetic pole 1 of each two of the magnetic pole 1 formed by rotor material, by elongated arc linkage section
12 (see Fig. 4) are connected with each other, so as to avoid the injection molding body in conventional rotors from being arranged on the arrangement side between the adjacent pole of disconnection
Formula, improves the intensity of rotor, and thereby extends the service life of the rotor and the motor using the rotor.It is thin on this
The feature of arc linkage section 12 long is described in detail hereinafter with reference to Fig. 4.
Fig. 2 is now turned to, and reference picture 2 describes the shape of the outer surface of rotor 5 in detail.Specifically, magnetic pole 1 is formed in
Between adjacent permanent-magnet ferrite 3, and its quantity corresponds to the quantity of permanent-magnet ferrite.In the embodiment according to Fig. 2
In, the quantity of permanent-magnet ferrite 3 is eight, therefore, the quantity for forming magnetic pole 1 therebetween is also eight；In the implementation for substituting
In example, the quantity of magnetic pole can neatly be selected according to specifically application.
The outer surface of rotor 5 by multiple alternate arrangements magnetic pole 1 outer surface and elongated arc linkage section 12 (see Fig. 4)
Outer surface formed.According to one embodiment of present invention, the outer surface of magnetic pole 1 shows in the front view of the rotor of Fig. 2
It is SPL to go out, and the SPL corresponds to smooth spline surface 11 in space.Therefore, the outer surface of rotor 5
The outer surface of the arc linkage section 12 being connected with each other including multi-segment spline curved surface 11 and by the multi-segment spline curved surface 11.Fig. 2's
In view, every section of spline surface 11 across mechanical angle be θ0, and the spline surface 11 is on its center axis (i.e. θ=0 °
Place, only denotes at θ=0 ° in Fig. 2 on a magnetic pole, but it is understood that, other each magnetic poles are at θ=0 °
Have corresponding central axis, simply omit and do not indicate) axisymmetricly, wherein θ0Magnetic pole 1 across electrical angle β0With the pole of motor
The ratio of logarithm P.In the embodiment illustrated in figure 2, number of pole-pairs P is 4；In alternate embodiments, the number of pole-pairs of motor can be with
Neatly selected according to concrete application, but be typically not less than 3 pairs.In a preferred embodiment, number of pole-pairs P is 4, every section of batten
Curved surface 11 across angle be 31 °.
In order that the non-load air gap field for obtaining motor of the invention is closer to Sine distribution, counter potential waveform is reduced
Harmonic content, and improve magneto traveling comfort and reduce vibration and noise, obtain the electricity with excellent properties
Machine, applicant is optimized design to the shape of spline surface 11, so as to obtain having the motor gas-gap for meeting above-mentioned requirements.
Especially, special design is carried out by the shape to spline surface 11, obtains specific non-homogeneous air gap, it is above-mentioned so as to realize
Excellent motor performance.Non-homogeneous air gap described in text refers to the outer surface of the magnetic pole 1 of rotor to internal diameter (the i.e. stator of stator
Inner surface) gas length between 6 is not uniformly distributed circumferentially.
In an embodiment according to the present invention, the shape of spline surface 11 is designed such as, and rotor 5 outer surface is formed as
Minimal air gap between the part of spline surface 11 and the internal diameter 6 of stator with the ratio of periphery air gap is changed with electrical angle β
Cosine function.Therefore, in an embodiment according to the present invention, the non-homogeneous air gap between stator inner surface and the outer surface of rotor
It is presented as, the gas length at the central axis of magnetic pole 1 is most short, is δmin, and when the spline surface 11 is along magnetic pole 1
When central axis extends to both sides, air gap delta is with certain rule (δmin/ δ is the cosine function of electrical angle β) gradually increase, farthest
(the i.e. θ=± 1/2 θ away from the position of the central axis of magnetic pole 10Place) air gap delta length it is maximum, be δmax。
Figure 3 illustrates half smooth spline surface 11, (i.e. θ is 0 to 1/2 θ0Scope, wherein θ is with magnetic pole
Heart axis be starting point calculate, represent apart from magnetic pole 1 central axis mechanical angle angle value) minimal air gap and periphery air gap ratio
Value (i.e. δmin/ δ, represents in ordinate) with electrical angle β (represent in abscissa) change diagram.In the curve of Fig. 3
In, abscissa represents electrical angle β, and ordinate represents δminThe ratio of/δ.Especially, between spline surface 11 and diameter of stator bore 6
Minimum clearance δminReached at β=0, minimum clearance δminIt is with electrical angle β (β=P × θ, P with the ratio of periphery air gap delta
Be the number of pole-pairs of motor, P=4 in an embodiment of the present invention) change cosine function, i.e. δmin/ δ=cos (β).Preferred
In embodiment, the excursion of air gap delta is substantially in the range of 0.3mm to 1.1mm.
Fig. 4 is another diagram of the front view of rotor, shows SPL and linkage section 12 relative to the motor
The size relationship of rotor.Specifically, as shown in figure 4, by the company of a smooth rotor core between adjacent SPL
Connect section 12 and connect (that is the outer surface between adjacent splines curved surface 11 by linkage section 12 connects), so as to avoid phase
The injection molding body that disconnection between adjacent magnetic pole and avoiding is used for fixed permanent magnet therebetween bears larger torque, so that injection molding body
It is not easy to break so that the stable performance of motor, service life extension.
In an embodiment of the present invention, permanent-magnet ferrite 3 is formed as square strip, and for receiving permanent-magnet ferrite 3
Groove 2 be also configured as being suitable for receiving the square strip of permanent-magnet ferrite 3.The arc of linkage section 12 is shaped such that in linkage section
Dead slot 13 is formed between 12 lower sections and the top of permanent-magnet ferrite 3 (see Fig. 2 and Fig. 4).Linkage section 12 is formed as into arc-shaped,
Be conducive to increasing the volume of dead slot 13, so as to be conducive to injecting enough injection molding bodies in dead slot 13 further preferably fixing
Permanent magnet 3.Simultaneously linked together by linkage section 12 between adjacent pole 1, it is to avoid the disconnection between adjacent pole, from
And the adjacent pole that injection molding body disconnects without connection so that the injection molding body being filled in dead slot 13 without being subjected to excessive torque,
It is not easy to fracture or break up in the course of work that long-time runs at high speed motor.
Additionally, linked together by linkage section 12 between adjacent pole 1, hindered by causing that magnetic circuit reaches saturation herein
The magnetic line of force loop formed here for hindering permanent-magnet ferrite to send, reduces leakage field phenomenon, improves the efficiency of motor.It is theoretical
On, the thickness of linkage section 12 is narrower, and length is more long, and leakage field is smaller；But the thickness of linkage section 12 can not select too small, to protect
Demonstrate,prove the support strength of rotor edge.In a preferred embodiment according to the present invention, the substantially camber of linkage section 12, its thickness is preferred
Ground is selected from the range of 0.4mm to 0.6mm.Especially, the difference between the exradius R2 and inner circle radius R1 of linkage section 12
(R2-R1, corresponding to the thickness of linkage section 12) is preferably in the range of 0.4mm to 0.6mm.
The width of linkage section 12 is in fig. 4 to mark b1 to represent, and b1 is less than the width b2 of permanent-magnet ferrite 3.Specifically
The distance between ground, the width b1 of linkage section 12 is the linkage section 12 with two tie points of adjacent SPL.Linkage section
The lengthening of 12 width b1 can be realized preferably suppressing leakage field phenomenon, but it is no more than permanent-magnet ferrite 3 or groove 2
Width.The long connection support strengths that will reduce rotor outer periphery edge of width b1.
The selection of this thickness and width limitation of linkage section 12 as described above can well ensure rotor edge
Mechanical support intensity, and the good suppression to leakage field phenomenon is realized simultaneously, improve electric efficiency.
Additionally, the height H1 of linkage section 12 (that is, the distance in the axle center of the vertex distance rotor of linkage section 12, shows in fig. 4
Go out) be not more than SPL vertex distance rotor axle center apart from H2 (also figure 4 illustrates), but be greater than SPL
Apart from the axle center of rotor 1 apart from H3 at farthest away from the minimum point on the summit.Such body being designed with beneficial to increase dead slot 13
Product, so as to be conducive in the dead slot 13 the enough injection molding bodies of injection with further preferably fixed permanent magnet 3.
Therefore, the design of rotor structure middle connecting segment 12 of the invention, can realize causing for fixed injection
The intensity of body increased, so as to advantage not easy to break, and the specific size design of the linkage section 12 can also protected
On the premise of card mechanical strength higher, reduce leakage field phenomenon, and thereby improve the efficiency and power density of motor, and and then carry
The performance of motor high and the washing machine using the motor.
Fig. 5 shows the sectional view of motor according to an embodiment of the invention, and wherein rotor 5 and stator has been coupled to one
Rise.As shown in figure 5, the folded thick L1 of rotor 5 is different with the folded thick L2 length of stator core 4.In a preferred embodiment, stator iron
The ratio (i.e. L2/L1) of the folded thick L2 of core 4 and the folded thick L1 of rotor core 5 is in the range of 0.8 to 0.96；It is highly preferred that should
Ratio is 0.93.
Specifically, in order to ensure efficiency of the motor in high-speed cruising, can be long by shortening the iron core of stator core 4
Degree, so that iron loss when reducing high speed operation of motor.While the magnetic flux in order to ensure stator, the core length design of rotor 5
It is that, more than the length of stator core 4, can so make full use of the end effect of stator winding.Therefore, by the folded of stator core 4
The ratio of the folded thick L1 of thick L2 and rotor core 5 is designed as less than 1, preferably in the range of 0.8 to 0.96, more preferably
0.93 numerical value, can reduce iron loss during motor operation, improve electric efficiency, and ensure enough magnetic flux and motor simultaneously
Power.
Fig. 6 show with embodiments in accordance with the present invention optimization after rotor structure motor cogging torque with it is existing
Motor with traditional rotor magnetic circuit structural (being not optimised the air gap shape between rotor and motor stator) in technology
The correlation curve of the experimental result of cogging torque.In two curves as shown in Figure 6, dotted line represents the tooth of the motor being not optimised
The curve that groove torque is changed over time, and solid line then represents that the teeth groove of the motor that disclosure of the invention is optimized turns
The curve that square is changed over time.
Fig. 7 shows the back-emf of the rotor structure after optimizing with embodiments in accordance with the present invention and has in the prior art
There is the correlation curve of the experimental result of the back-emf of the motor of traditional rotor magnetic circuit structural.In two curves as shown in Figure 7
In, similar to Fig. 6, dotted line represents the curve that the back-emf of the motor being not optimised is changed over time, and solid line is then represented according to this
The curve that the back-emf of the motor that disclosure of the invention content is optimized is changed over time.
From fig. 6 it can be seen that the cogging torque of optimized motor compares the cogging torque reduction of the motor being not optimised
Intimate ten times, vibration and noise is greatly reduced when this can bring motor operation.Also, it can be seen from figure 7 that through
Harmonic content in the counter potential waveform of the motor of optimization compares the harmonic content in the counter potential waveform of the motor being not optimised
Decline to a great extent.Setting for rotor outer surface shape of the invention is can be seen that from the correlation curve of such as experimental result of Fig. 6-7
Meter, the particularly design of the shape of spline surface 11 can aid in reduction cogging torque, while reducing counter potential waveform
In back-emf harmonic content so that air-gap field is transported closer to the tracks of line voltage so as to be conducive to improving motor low speed
Capable stationarity and vibration when reducing high speed operation of motor and noise, and the structure and shape of linkage section 12 also help and carry
The power density and efficiency of motor high.Motor after optimization can realize being remained in that under higher rotation speed efficiency higher and compared with
Low vibration and noise, this enables to have quality higher using this kind of roller washing machine of motor.
Motor according to embodiments of the present invention can use foregoing rotor structure.More specifically, the motor can be used
Rotor structure with the linkage section for connecting adjacent pole, the outer surface of wherein magnetic pole is designed as specific spline surface,
So that the ratio of the minimal air gap and periphery air gap between spline surface and the internal diameter of stator is the cosine letter changed with electrical angle
Number.This kind of uneven air-gap arrangement can aid in reduction cogging torque, reduce the harmonic content in counter potential waveform, reduce
Torque pulsation during high speed when the vibration of motor, noise and low speed, improves the reliability and efficiency of motor.
Motor according to embodiments of the present invention can also be a kind of with the permagnetic synchronous motor including foregoing rotor structure
Roller washing machine.Permagnetic synchronous motor of the invention can be used for the drum driven of washing machine, so as to reduce roller wash
When running at high speed, such as vibration and noise when being dehydrated improve its quality to clothing machine.
Rotor structure according to embodiments of the present invention can play the performance of motor so that using the laundry drum of the motor
The detersive efficiency and dewatering efficiency of machine can keep level higher, reduce noise and vibration, improve washing machine quality；Also,
Rotor structure according to embodiments of the present invention and stator structure cooperate, can further lifting motor performance, reduce high speed
When vibration and noise and low cruise stationarity, improve washing machine quality.
The above is only exemplary embodiment of the invention, not for limiting the scope of the invention, this hair
Bright protection domain is determined by appended claim.
Claims (14)
1. a kind of rotor (5),
Characterized in that,
The rotor (5) with multiple grooves (2),
The plurality of groove (2) is distributed along the radial direction radial of the rotor (5), and for by multiple permanent-magnet ferrites
(3) receive in the inner,
Wherein, the outer surface of the rotor (5) is by the multiple of the circumferentially distributed and alternate arrangement along the rotor (5)
The non-circular geometric face that the outer surface of spline surface (11) and arc linkage section (12) is formed so that when the rotor (5) is installed
It is interior circular motor stator core (4), the outer surface of the rotor (5) and the stator iron of the motor stator to inner surface
Gap between core (4) is non-homogeneous air gap.
2. rotor (5) according to claim 1, it is characterised in that receive in adjacent groove (2) it is adjacent forever
The mutually facing surface of magnetic ferrites (3) has identical polarity so that form magnetic between the adjacent ferrite of each pair (3)
Pole (1).
3. rotor (5) according to claim 2, it is characterised in that the outer surface of the magnetic pole (1) is the batten
Curved surface (11), the adjacent magnetic pole of each two (1) is connected by the arc linkage section (12).
4. rotor (5) described in any one according to claim 1-3, it is characterised in that the spline surface (11)
On its center axis axisymmetricly, and wherein the air gap at heart axis and between stator core (4) is minimal air gap
δmin, the minimal air gap δminRatio with the air gap delta between the spline surface (11) and the stator core (4) is described
Cosine function of the rotor relative to the electrical angle β that the central axis of the spline surface (11) is turned over, wherein the electric angle
Degree β is the rotor extremely right with motor relative to the mechanical angle θ that the central axis of the spline surface (11) is turned over
The product of number P.
5. rotor (5) according to claim 4, it is characterised in that the shape of the spline surface (11) meets public
Formula：δmin/ δ=cos (β).
6. rotor (5) described in any one according to claim 1-3, it is characterised in that rotor (5) tool
There are equally distributed eight grooves (2) in circumferentially direction, and be respectively used to be received in eight permanent-magnet ferrites (3) wherein, often
Spline surface described in bar (11) on its center axis axisymmetricly, and across mechanical angle (θ0) it is 31 °.
7. rotor (5) according to claim 3, it is characterised in that the arc linkage section (12) and it is described forever
Dead slot (13) is formed between magnetic ferrites (3), injection molding body is injected into the dead slot (13), permanent-magnet ferrite (3) is entered
One step is fixed in the groove (2).
8. rotor (5) according to claim 3, it is characterised in that the thickness of the arc linkage section (12) exists
In the range of 0.4mm to 0.6mm, wherein the thickness of the arc linkage section (12) is cylindrical the half of the arc linkage section (12)
Difference between footpath (R2) and inner circle radius (R1).
9. rotor (5) according to claim 3, it is characterised in that the width (b1) of the arc linkage section (12)
Less than the width (b2) of the permanent-magnet ferrite, wherein the width (b1) of the arc linkage section (12) is the arc linkage section
(12) the distance between with adjacent (11) two tie points of spline surface.
10. rotor (5) according to claim 3, it is characterised in that the height (H1) of the arc linkage section is less
In the distance (H2) in the summit of the spline surface (11) and the axle center of the rotor, and more than the spline surface (11)
The minimum point farthest away from its summit at distance (H3) with the axle center of the rotor, wherein the height of the arc linkage section
Degree (H1) is the summit of the arc linkage section (12) and the distance in the axle center of the rotor (5).
11. a kind of motors, it is characterised in that the motor includes the rotor according to any one of claim 1-10
(5)。
12. motors according to claim 11, it is characterised in that
Also include stator, the inner surface (6) of the stator core (4) of the stator is overall circular, and the stator core (4)
Including Central Symmetry, the stator tooth being circumferentially evenly arranged (21), groove is formed between the adjacent stator tooth of each two (21)
(22), each described groove (22) is for receiving corresponding armature winding in the inner.
13. motor according to claim 11-12 any one, it is characterised in that the folded thickness of the stator core (4)
(L2) less than the folded thickness (L1) of the rotor (5).
14. motors according to claim 13, it is characterised in that the stator core (4) it is folded thickness (L2) with described turn
The ratio (L2/L1) of the folded thickness (L1) of sub (5) is in the range of 0.8 to 0.96.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610986714.3A CN106712345A (en) | 2016-11-09 | 2016-11-09 | Motor rotor and motor adopting the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610986714.3A CN106712345A (en) | 2016-11-09 | 2016-11-09 | Motor rotor and motor adopting the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106712345A true CN106712345A (en) | 2017-05-24 |
Family
ID=58940456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610986714.3A Pending CN106712345A (en) | 2016-11-09 | 2016-11-09 | Motor rotor and motor adopting the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106712345A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107482811A (en) * | 2017-09-30 | 2017-12-15 | 广东威灵电机制造有限公司 | For built-in motor rotor core and there is its built-in motor |
| CN109038880A (en) * | 2018-08-20 | 2018-12-18 | 重庆力华自动化技术有限责任公司 | A kind of poly- magnetic-synchro motor of efficient ferrite |
| CN109980799A (en) * | 2017-12-22 | 2019-07-05 | 罗伯特·博世有限公司 | Synchronous motor |
| CN110768398A (en) * | 2018-07-25 | 2020-02-07 | 广东美芝制冷设备有限公司 | Motor structure and compressor |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001346368A (en) * | 2000-03-31 | 2001-12-14 | Sanyo Denki Co Ltd | Synchronous motor comprising a permanent magnet |
| CN101119041A (en) * | 2006-07-19 | 2008-02-06 | 发那科株式会社 | Permanent magnetic synchronous electrical motor |
| CN104054237A (en) * | 2012-02-17 | 2014-09-17 | 日本电产株式会社 | Rotor core, motor, and method for manufacturing motor |
| KR20150063217A (en) * | 2013-11-29 | 2015-06-09 | 삼성전자주식회사 | Motor and washing machine having the same |
| CN104734446A (en) * | 2015-04-09 | 2015-06-24 | 莱克电气股份有限公司 | Built-in type permanent magnet synchronous motor |
| CN104756366A (en) * | 2012-11-01 | 2015-07-01 | 三菱电机株式会社 | Electric motor with embedded permanent magnet, compressor, and refrigeration and air conditioning equipment |
| CN105529851A (en) * | 2016-02-04 | 2016-04-27 | 常州雷利电机科技有限公司 | Rotor punching plate, motor rotor and motor applying motor rotor |
| CN206135588U (en) * | 2016-11-09 | 2017-04-26 | 常州雷利电机科技有限公司 | Electric motor rotor and use its motor |
-
2016
- 2016-11-09 CN CN201610986714.3A patent/CN106712345A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001346368A (en) * | 2000-03-31 | 2001-12-14 | Sanyo Denki Co Ltd | Synchronous motor comprising a permanent magnet |
| CN101119041A (en) * | 2006-07-19 | 2008-02-06 | 发那科株式会社 | Permanent magnetic synchronous electrical motor |
| CN104054237A (en) * | 2012-02-17 | 2014-09-17 | 日本电产株式会社 | Rotor core, motor, and method for manufacturing motor |
| CN104756366A (en) * | 2012-11-01 | 2015-07-01 | 三菱电机株式会社 | Electric motor with embedded permanent magnet, compressor, and refrigeration and air conditioning equipment |
| KR20150063217A (en) * | 2013-11-29 | 2015-06-09 | 삼성전자주식회사 | Motor and washing machine having the same |
| CN104734446A (en) * | 2015-04-09 | 2015-06-24 | 莱克电气股份有限公司 | Built-in type permanent magnet synchronous motor |
| CN105529851A (en) * | 2016-02-04 | 2016-04-27 | 常州雷利电机科技有限公司 | Rotor punching plate, motor rotor and motor applying motor rotor |
| CN206135588U (en) * | 2016-11-09 | 2017-04-26 | 常州雷利电机科技有限公司 | Electric motor rotor and use its motor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107482811A (en) * | 2017-09-30 | 2017-12-15 | 广东威灵电机制造有限公司 | For built-in motor rotor core and there is its built-in motor |
| CN107482811B (en) * | 2017-09-30 | 2023-08-22 | 广东威灵电机制造有限公司 | Rotor core for built-in motor and built-in motor having the same |
| CN109980799A (en) * | 2017-12-22 | 2019-07-05 | 罗伯特·博世有限公司 | Synchronous motor |
| CN110768398A (en) * | 2018-07-25 | 2020-02-07 | 广东美芝制冷设备有限公司 | Motor structure and compressor |
| CN109038880A (en) * | 2018-08-20 | 2018-12-18 | 重庆力华自动化技术有限责任公司 | A kind of poly- magnetic-synchro motor of efficient ferrite |
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