CN207134963U - Rare-earth permanent-magnet electric machine and compressor - Google Patents
Rare-earth permanent-magnet electric machine and compressor Download PDFInfo
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- CN207134963U CN207134963U CN201720764267.7U CN201720764267U CN207134963U CN 207134963 U CN207134963 U CN 207134963U CN 201720764267 U CN201720764267 U CN 201720764267U CN 207134963 U CN207134963 U CN 207134963U
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Abstract
The utility model provides a kind of rare-earth permanent-magnet electric machine, including stator and rotor, stator includes stator core and stator winding, stator core includes the stator slot limited and the rotor receiving portion limited by the inner end edge of multiple stator tooths between multiple stator tooths along the circumferentially-spaced distribution of stator, two neighboring stator tooth, stator winding is arranged in stator slot, and rotor is rotatably provided in rotor receiving portion relative to stator；Rotor includes rotor core；Wherein, the span of the maximum outside diameter Dor of stator core length Ls in axial direction and rotor core ratio is：1.284≤Ls/Dor≤1.48.The utility model proposes motor, realize and less vibration and noise produced in the state of running at high speed, while ensure that the efficiency of motor, reduce the cost of motor.
Description
Technical field
Technical field of motors is the utility model is related to, more particularly, to a kind of rare-earth permanent-magnet electric machine and there is the electricity
The compressor of machine.
Background technology
For existing rotary compressor motor, because fractional-slot concentratred winding motor has efficiency high, cost low
Clear superiority, be commonly used as the preferred type of compressor.In general, three key factors point of electric and magnetic oscillation are caused
Not Wei radial electromagnetic force each harmonic amplitude, frequency and order, rather than load torque fluctuation.For fractional-slot concentratred winding permanent magnetism
For motor, the harmonic wave electromagnetic force of its minimum order is generally below the integer groove motor of identical number of pole-pairs, and the Reeb is to cause
Stator vibrates and the main contributor of noise of motor.Further, since general higher, the institute of the modal frequency of the stator structure of micro-machine
So that when the order and close frequency of stator structure exponent number and frequency and radial electromagnetic force, motor can produce resonance.When this electricity
When machine is used under high rotating speed running status, the radial direction harmonic wave electromagnetic force of low order and high frequency is both present in high-frequency range, stator mould
State frequency can cover the frequency of these harmonic wave electromagnetic forces, and stator resonates, and bigger noise is radiated to outside motor.
Utility model content
The utility model is intended at least solve one of technical problem present in prior art.
Therefore, first purpose of the present utility model is, there is provided one kind remains to keep less at high speeds to shake
The rare-earth permanent-magnet electric machine of moving noise.
Second purpose of the present utility model is, there is provided a kind of compressor, including above-mentioned rare-earth permanent-magnet electric machine.
In view of this, according to first purpose of the present utility model, the utility model proposes a kind of motor, including stator
And rotor, stator include stator core and stator winding, stator core includes multiple stators along the circumferentially-spaced distribution of stator
The stator slot limited between tooth, two neighboring stator tooth and the rotor limited by the inner end edge of multiple stator tooths accommodate
Portion, stator winding are arranged in stator slot, and rotor is rotatably provided in rotor receiving portion relative to stator；Rotor includes rotor
Iron core；Wherein, the span of the maximum outside diameter Dor of stator core length Ls in axial direction and rotor core ratio
For：1.284≤Ls/Dor≤1.48.
A kind of rare-earth permanent-magnet electric machine provided by the utility model, including stator and rotor, wherein stator include stator core
And stator winding, stator core is again by the circumferentially-spaced equally distributed multiple stator tooths of stator, between adjacent two stator tooths
The stator slot limited, and the rotor receiving portion limited by the internal edge of multiple stator tooths are formed；Stator winding is set
In stator slot, rotor is then relatively with stator rotary setting in rotor receiving portion；Rotor includes rotor core；Wherein, stator
The span of the maximum outside diameter Dor of iron core length Ls in axial direction and rotor core ratio is：1.284≤Ls/Dor
≤1.48.In general, electromagnetic noise mainly as caused by air-gap field acts on the radial component of stator core, depending on
The deflection of sub- iron core is directly proportional to the first power of HARMONIC FORCE wave amplitude, so the electromagnetic vibration noise of this motor is reduced,
The amplitude for weakening its each secondary radial electromagnetic force ripple is one of Main Means.In motor of the present utility model, to stator core edge
Design is optimized in the length Ls of axial direction and the maximum outside diameter Dor of rotor core ratio, by above-mentioned ratio Ls/
Dor adjustment, its span is limited between 1.284 to 1.48, reduce air-gap field fundamental wave and its each harmonic amplitude, cut
The load armature-reaction of weak stator side, the amplitude of each secondary radial direction harmonic wave electro-magnetic exciting force is effectively reduced, so as to reach reduction motor
The effect of electromagnetic vibration noise.
In addition, according to above-mentioned rare-earth permanent-magnet electric machine provided by the utility model, there can also be following supplementary technology special
Sign：
In the above-mentioned technical solutions, it is preferable that rotor includes rotor core, the length Lr of rotor core in axial direction with
The span of the maximum outside diameter Dor of rotor core ratio is：1.1≤Lr/Dor≤1.6.
To rotor core length Lr in axial direction and the outer diameter D or of rotor core ratio in the technical scheme
Lr/Dor value optimizes value, limits it between 1.1 to 1.6, and realization reduces air-gap field fundamental wave and its each time humorous
Wave amplitude, weaken the load armature-reaction of stator side, so as to effectively reduce the amplitude of each secondary radial direction electro-magnetic exciting force, reach reduction
The effect of motor electromagnetic noise.
In any of the above-described technical scheme circumferentially spacedly, it is preferable that rotor includes rotor core, is set on rotor core
It is equipped with multiple magnet slots；Wherein, the quantity of the magnet slot pair of rotor core meets 2≤N≤4, and N is natural number.
Rotor core is included in the technical scheme transfer attached bag, is provided with multiple magnetic wherein on rotor core circumferentially spacedly
Body groove, value is optimized to the quantity value of wherein magnet slot pair, make the quantity N of magnet slot pair between 2 to 4, so, when
When motor operation is under higher rotation speed, it can effectively suppress electric machine rotor core loss, lifting motor performance, meanwhile, no
Excessive setting magnet slot reduces unnecessary cost consumption to controlling corresponding motor manufacturing cost.
In any of the above-described technical scheme, it is preferable that rotor also includes the multiple magnetic being respectively arranged in multiple magnet slots
Property part, the radial direction for extending perpendicularly to rotor core of magnetic part, and size hm of the magnetic part along the radial direction of rotor core
Span be：1.1×(Ris-Ror)≤hm≤5×(Ris-Ror)；Wherein, Ris be rotor receiving portion radius, Ror
For the radius of rotor core.
In the technical scheme, rotor also includes the multiple magnetic parts being arranged in multiple magnet slots, the extension of magnetic part
Optimization design and is made perpendicular to the radial direction of rotor core in direction to size hm values of the magnetic part along the radial direction of rotor core,
To obtain larger energy density, so as to obtain sufficiently large torque as far as possible, and can be by high-frequency harmonic electromagnetic field in stator
With caused eddy-current loss control in the iron core of rotor in OK range, guarantee electric efficiency；Meanwhile magnetic part can be along vertical
With radially extending for rotor core, under certain frequency, the counter electromotive force of motor is directly proportional to the first power per pole magnetic flux,
That is, in axial direction length can make the close fundamental voltage amplitude of radial air gap magnetic of motor and its each harmonic amplitude have different journeys for increase
The reduction of degree.It is the root for producing radial electromagnetic force, therefore, the close fundamental voltage amplitude of radial air gap magnetic because motor radial air gap magnetic is close
And its each harmonic amplitude reduces and necessarily causes each secondary radial direction harmonic wave electromagnetic force to reduce, and then reduce the vibration noise of motor.
In any of the above-described technical scheme, it is preferable that rotor includes rotor core, and rotor core is transversal perpendicular to axial direction
The outline in face is circle.
Outline of the rotor core perpendicular to the cross section of axial direction is provided in round in the technical scheme, on the one hand circular
Outward flange the efficiency of motor so as to reduce energy loss, can be ensured, separately with the limited air drag reduced in rotation process
On the one hand circular design can reduce the inhomogeneities in the gap between stator and rotor, reduce magnetic pull caused by rotor,
Reduce unbalance vibration, so as to reduce caused noise.
In any of the above-described technical scheme, it is preferable that rotor includes rotor core, and rotor core is included along rotor core axle
To multiple rotor core layers of stacking, the thickness h r of rotor core layer span is：hr≤0.3mm.
Rotor core is included in the technical scheme transfer attached bag, wherein rotor core includes axially stacked along rotor core again
Multiple rotor core layers, by optimizing to the thickness h r values of rotor core layer, its span is set to be less than or equal to 0.3mm, from
And the thickness of reduction rotor core layer appropriate under conditions of the moment of torsion of meet demand is provided, so as to the system of reasonable controlled motor
This is caused, effective reducing vortex loss, improves corresponding electric efficiency.
In any of the above-described technical scheme, it is preferable that the radius Ros of the outline of stator core span is Ros
≥40mm；And/or the radius Ris of rotor receiving portion and the radius Ros span of ratio of outline of stator core are
0.48≤Ris/Ros≤0.58。
Outline radius value setting to stator core in the technical scheme is more than or equal to 40mm, and/or rotor holds
The radii ratio value of the radius in portion and the outline of stator core received sets span between 0.48 to 0.58, so as to protect
Card rotor has enough spaces normally to be operated, while ensures that it can have fully enough magnet slots certain to accommodate
The magnetic part of size, so as to increase the efficiency of motor.
In any of the above-described technical scheme, it is preferable that along the radial direction of stator core, the bottom of stator slot and stator core
The distance between outward flange Tsy span is 15mm >=Tsy >=8mm.
Bottom in the technical scheme to stator slot and the distance Tsy between the outward flange of stator core value are carried out
Optimization design, when obtaining 8mm between 15mm, in this case, the yoke portion of stator has thicker thickness, so as to
Noise is effectively reduced, while ensure that motor has enough electric efficiencies.
In any of the above-described technical scheme, it is preferable that the length Ls of stator core in axial direction span is
50mm≤Ls≤90mm。
The value of length Ls in the technical scheme to stator core in axial direction optimizes design, when value model
When being trapped among 50mm between 90mm, noise can be effectively reduced, while causes that the axial length of stator core will not be long again
And then have influence on the efficiency of motor.
In any of the above-described technical scheme, it is preferable that stator core is also included along axially stacked multiple fixed of stator core
Sub- iron core layer, the thickness h s of stator core layer span are：hs≤0.3mm.
Stator core is included along the axially stacked multiple stator core layers of stator core, stator core in the technical scheme
The thickness h s of layer optimizes value, rationally controls the thickness of stator core layer to realize the manufacturing cost of reasonable controlled motor, has
Effect reduces eddy-current loss, so as to improve electric efficiency.
In any of the above-described technical scheme, it is preferable that the specified running speed of motor is more than or equal to 6000 revs/min
Clock；And/or the maximum running speed of motor is more than or equal to 9000 revs/min；And/or the back electromotive-force constant Ke=E/ of motor
N, Ke span are 7 volts/(thousand revs/min)≤Ke≤36 volt/(thousand revs/min), wherein, E be motor extraction line terminals it
Between back-emf virtual value, the rotating speed of n motors.
The specified running speed of motor is set greater than or equal to 6000 revs/min, makes motor in the technical scheme
High-speed rotation, so as to improve electric efficiency, reduce the loss of energy；And/or the maximum running speed of motor is more than or equal to
9000 revs/min, higher power can be reached；And/or the back electromotive-force constant Ke of motor value be set in 7 volts/(thousand turns/
Point) to 36 volts/(thousand revs/min) between so that motor obtains enough electric current, ensure that motor has enough torques, improve motor
Efficiency, wherein back-emf virtual value and motor of the back electromotive-force constant of motor between the extraction line terminals of motor rotating speed
Ratio.
According to second purpose of the present utility model, the utility model proposes a kind of compressor, including any of the above-described skill
The motor provided in art scheme.
According to the utility model proposes compressor, there is motor provided by the utility model, therefore the compressor has
The whole beneficial effects for the motor that any of the above-described technical scheme provides.
Additional aspect and advantage of the present utility model will become obvious in following description section, or new by this practicality
The practice of type is recognized.
Brief description of the drawings
Of the present utility model above-mentioned and/or additional aspect and advantage will in the description from combination accompanying drawings below to embodiment
Become obvious and be readily appreciated that, wherein：
Fig. 1 is the structural representation of the rare-earth permanent-magnet electric machine of the utility model first aspect embodiment, and wherein stator is with turning
Son is engaged；
Fig. 2 is the schematic diagram of the stator in Fig. 1 motors；
Fig. 3 is the schematic diagram of the rotor in Fig. 1 motors；
Fig. 4 is the schematic diagram of the stator shaft orientation sectional view in Fig. 1 motors；
Fig. 5 is the structural representation of the compressor of the utility model second aspect embodiment, and the compressor includes showing in Fig. 1
The motor gone out；
Fig. 6 is that (rotating speed is 7200 revs/min to multiple motors with different Ls/Dor sizes, torque under declared working condition
For 6.9Nm) the frequency multiplication radial electromagnetic force density theory calculated value of 3 rank of motor 2；
Fig. 7 is that (rotating speed is 7200 revs/min to multiple motors with different Ls/Dor sizes, torque under declared working condition
For 6.9Nm) the frequency multiplication radial electromagnetic force density theory calculated value of 3 rank of motor 4；
Fig. 8 is that (rotating speed is 7200 revs/min to multiple motors with different Ls/Dor sizes, torque under declared working condition
For 6.9Nm) the frequency multiplication radial electromagnetic force density theory calculated value of 3 rank of motor 8；
Fig. 9 is that (rotating speed is 7200 revs/min to multiple motors with different Ls/Dor sizes, torque under declared working condition
For 6.9Nm) the frequency multiplication radial electromagnetic force density theory calculated value of 6 rank of motor 4；
Figure 10 be with different Ls/Dor sizes and rated speed be 7200 revs/min of multiple motors in load and
When rotating speed is 6000 revs/min, the curve map of the vibration acceleration on stator core surface under different electric frequencies；
Figure 11 be with different Ls/Dor sizes and rated speed be 7200 revs/min of multiple motors in load and
When rotating speed is 5400 revs/min, the curve map of the vibration acceleration on stator core surface under different electric frequencies；
Figure 12 is to turn respectively with multiple motors that different Ls/Dor sizes and rated speed are 7200 revs/min
Speed is 7200 revs/min and 3600 revs/min, torque 6.9Nm, electric efficiency comparison diagram；
Figure 13 is Ls/Dor when being 1.176, and motor is under the operating mode that rotating speed is 7200 revs/min, torque is 6.9Nm
Load counter potential waveform；
Figure 14 is Ls/Dor when being 1.345, and motor is under the operating mode that rotating speed is 7200 revs/min, torque is 6.9Nm
Load counter potential waveform；
Figure 15 is Ls/Dor when being 1.176, and motor is under the operating mode that rotating speed is 7200 revs/min, torque is 6.9Nm
Load radial air gap magnetic flux density waveformses；
Figure 16 is Ls/Dor when being 1.345, and motor is under the operating mode that rotating speed is 7200 revs/min, torque is 6.9Nm
Load radial air gap magnetic flux density waveformses；
Figure 17 is to turn respectively with multiple motors that different Ls/Dor sizes and rated speed are 7200 revs/min
Speed is 7200 revs/min, torque is under 6.9Nm operating modes, loads the close comparison diagram of radial air gap magnetic；
Figure 18 is with the Ls/Dor change in size of motor, to ensure that electric efficiency is constant, by increasing motor axially length
The curve map of the cost change of motor caused by degree.
Wherein, corresponding relations of the Fig. 1 into Fig. 5 between reference and component names is：
1 motor, 12 stators, 14 rotors, 120 stator cores, 122 stator tooths, 124 stator slots, 126 stator winding, 128 turns
Sub- receiving portion, 142 rotor cores, 144 magnet slots, 146 magnetic parts.
Embodiment
In order to be more clearly understood that above-mentioned purpose of the present utility model, feature and advantage, below in conjunction with the accompanying drawings and tool
The utility model is further described in detail body embodiment.It should be noted that in the case where not conflicting, this Shen
The feature in embodiment and embodiment please can be mutually combined.
Many details are elaborated in the following description in order to fully understand the utility model, still, this practicality
It is new to be different from mode described here using other and implement, therefore, the scope of protection of the utility model not by
The limitation of following public specific embodiment.
The rare earth permanent magnet electricity provided according to first aspect embodiment of the present utility model is described referring to Fig. 1 to Fig. 5
Machine 1.
As shown in Figures 1 to 4, according to first aspect embodiment of the present utility model, the utility model provides a kind of dilute
Native magneto 1, including：Stator 12 and rotor 14.
Specifically, stator 12 includes stator core 120 and stator winding 126, and stator core 120 includes the week along stator
To the multiple stator tooths 122 being spaced apart, the stator slot 124 limited between two neighboring stator tooth 122 and by multiple fixed
The rotor receiving portion 128 that the inner end edge of sub- tooth 122 limits, stator winding 126 are arranged in stator slot 124, the phase of rotor 14
It is rotatably provided in for stator 12 in rotor receiving portion 128；Rotor includes rotor core；Wherein, stator core 120 is vertically
The span of the length Ls in direction and the maximum outside diameter Dor of rotor core ratio is：1.284≤Ls/Dor≤1.48.
Motor 1 provided by the utility model, including stator 12 and rotor 14, wherein stator 12 include the He of stator core 120
Stator winding 126, stator core 120 is again by the circumferentially-spaced equally distributed multiple stator tooths 122 of stator, adjacent two stators
The stator slot 124 limited between tooth 122, and the rotor receiving portion 128 limited by the internal edge of multiple stator tooths 122
Form；Stator winding 126 is arranged in stator slot 124, and rotor 14 is then relative to be arranged at rotor receiving with the rotation round of stator 12
In portion 128；Rotor includes rotor core.Wherein, the maximum of the length Ls in axial direction of stator core 120 and rotor core is outer
The span of footpath Dor ratio is：1.284≤Ls/Dor≤1.48.In general, electromagnetic noise is mainly by air-gap field
Act on caused by the radial component of stator core, outwards propagated by the yoke portion of stator core, produce stator core and shake
Dynamic deformation.Specifically, the Gas-gap Magnetic Field Resonance Wave frequency spectrum of fractional-slot concentratred winding permasyn morot is closeer, caused harmonic wave
Number is less than the order of fundamental wave magnetic field, and the amplitude of the radial direction electro-magnetic exciting force of relatively low order is high, the radial direction of caused stator core
Deflection is larger, therefore this vibration noise of motor is big.And the first power of the deflection of stator core 120 and HARMONIC FORCE wave amplitude
Directly proportional, so to reduce the electromagnetic vibration noise of this motor 1, the amplitude for weakening its each secondary radial electromagnetic force ripple is primary hand
One of section.From Fig. 6 to Figure 11, with the increase of Ls/Dor ratios, the radial vibration acceleration of motor stator 12 is significantly
Reduce, so that the vibration of motor 1 reduces, corresponding caused noise, which also corresponds to, to be reduced.As shown in Figure 12, under declared working condition
The efficiency of motor increases with Ls/Dor increase.From Figure 13 to Figure 17, with the increase of Ls/Dor ratios, accordingly
Load radial air gap magnetic flux density waveformses rule, fluctuation amplitude is relatively low, and the aberration rate of waveform is also greatly decreased, therewith reduce produce
Noise.Figure 18 is shown to ensure that electric efficiency is constant, is become by the cost for increasing motor caused by motor axial length
The curve map of change, i.e. as the corresponding motor cost of the increase of ratio also gradually increases, therefore, the value of reasonable control ratio
Be advantageous to the control of cost.In motor of the present utility model, to the length Ls of stator core 120 in axial direction and rotor iron
Design is optimized in the outer diameter D or of core 142 ratio, therefore by the adjustment to above-mentioned ratio Ls/Dor, considers footpath
To the electric efficiency and motor cost under vibration acceleration, declared working condition, the Ls/Dor suitable value of ratio is 1.284 to 1.48
Between, come make its reduce air-gap field fundamental wave and its each harmonic magnetic it is close caused by each secondary radial direction harmonic wave electro-magnetic exciting force it is humorous
Wave amplitude, the load armature-reaction of stator side is slackened, so as to reach the effect for reducing motor electromagnetic vibration noise, controlled simultaneously
The manufacturing cost of motor.
In one embodiment of the present utility model, it is preferable that the length Lr and rotor of rotor core 142 in axial direction
The span of the outer diameter D or of iron core 142 ratio is：1.1≤Lr/Dor≤1.6.
In this embodiment, to rotor core length Lr in axial direction and the outer diameter D or of rotor core ratio Lr/
Dor value optimizes value, limits it between 1.1 to 1.6, and realizing reduces air-gap field fundamental wave and its each harmonic width
Value, the load armature-reaction of stator side is slackened, so as to effectively reduce the amplitude of each secondary radial direction electro-magnetic exciting force, reach reduction motor
The effect of electromagnetic noise.
In one embodiment of the present utility model circumferentially spacedly, it is preferable that be provided with rotor core 142 multiple
Magnet slot 144；Wherein, the magnet slot of rotor core 142 meets 2≤N≤4 to 144 quantity, and N is natural number.
In this embodiment, rotor 14 includes rotor core 142, is wherein circumferentially evenly spaced apart on rotor core 142
Multiple magnet slots 144 are provided with, the setting of these positions of magnet slot 144 is axially symmetric, to ensure uniform force, while to wherein magnetic
The quantity value of 144 pairs of body groove optimizes value, makes the quantity N of magnet slot pair so, rotor 14 is obtained between 2 to 4
Enough to energy make its high-speed rotation so as to obtain enough torques, meanwhile, not excessive setting magnet slot 144 is to controlling
The corresponding manufacturing cost of motor 1, reduces unnecessary cost consumption.
In one embodiment of the present utility model, it is preferable that rotor 14 also includes being respectively arranged at multiple magnet slots 144
In multiple magnetic parts 146, the radial direction for extending perpendicularly to rotor core 142 of magnetic part 146, and the edge of magnetic part 146
The size hm of the radial direction of rotor core 142 span is：1.1×(Ris-Ror)≤hm≤5×(Ris-Ror)；Wherein,
Ris is the radius of rotor receiving portion 128, and Ror is the radius of rotor core 142.
In this embodiment, rotor 14 also includes the multiple magnetic parts 146 being arranged in multiple magnet slots 144, magnetic part
146 radial direction for extending perpendicularly to rotor core 142, and to the size of radial direction of the magnetic part 146 along rotor core 142
Hm values make optimization design, to obtain larger energy density, so as to obtain sufficiently large torque as far as possible, and can be by high frequency
Harmonic Field caused eddy-current loss in the iron core of stator 12 and rotor 14 controls the effect for ensureing motor 1 in OK range
Rate；Meanwhile magnetic part 146 can along vertically being radially extended with rotor core 142, under certain frequency, motor 1 it is anti-electronic
Gesture is directly proportional to the first power per pole magnetic flux, i.e. in axial direction length can make the close fundamental wave of radial air gap magnetic of motor 1 for increase
Amplitude and its each harmonic amplitude have different degrees of reduction.It is to produce radial electromagnetic force because motor radial air gap magnetic is close
Root, therefore, the close fundamental voltage amplitude of radial air gap magnetic and its each harmonic amplitude reduce and necessarily cause each secondary radial direction harmonic wave electromagnetic force
Reduce, and then reduce the vibration noise of motor.
Further, the residual magnetic flux density of magnetic part is Br, can meet Br >=1.3, close with the energy for obtaining larger
Degree, sufficiently large torque is obtained under conditions of suitable magnet part volume as far as possible.
In one embodiment of the present utility model, it is preferable that rotor 14 includes rotor core 142, and rotor core 142 hangs down
Directly the outline in the cross section of axial direction is circle.
In this embodiment, outline of the rotor core 142 perpendicular to the cross section of axial direction is provided in round, on the one hand circle
The outward flange of shape, so as to reduce energy loss, can ensure the effect of motor 1 with the limited air drag reduced in rotation process
Rate, on the other hand circular design can reduce the inhomogeneities in the gap between stator 12 and rotor 14, reduce rotor 14 and produce
Raw magnetic pull, reduce unbalance vibration, so as to reduce caused noise.
In one embodiment of the present utility model, it is preferable that rotor 14 includes rotor core 142, and rotor core 142 wraps
Include along the axially stacked multiple rotor core layers of rotor core, the thickness h r of rotor core layer span and be：hr≤
0.3mm。
In this embodiment, rotor 14 includes rotor core 142, and wherein rotor core 142 is included along rotor core axle again
To multiple rotor core layers of stacking, by optimizing to the thickness h r values of rotor core layer, it is less than or equal to its span
0.3mm, so as to the thickness of appropriate reduction rotor core layer under conditions of the moment of torsion of meet demand is provided, so as to rationally control
The manufacturing cost of motor 1, effective reducing vortex loss, improves corresponding electric efficiency.
In one embodiment of the present utility model, it is preferable that the radius Ros of the outline of stator core 120 value
Scope is Ros >=40mm；And/or the radius Ris of rotor receiving portion 128 and the radius Ros of the outline of stator core 120 ratio
The span of value is 0.48≤Ris/Ros≤0.58.
In this embodiment, the outline radius value setting to stator core 120 is more than or equal to 40mm, and/or rotor
The radii ratio value of the radius of receiving portion 128 and the outline of stator core sets span between 0.48 to 0.58,
Referring to Fig. 2 and Fig. 4, so as to ensure that rotor 14 has enough spaces normally to be operated, while it is abundant to ensure that it can have
Enough magnet slots 144 accommodate the magnetic part of certain size, so as to increasing the efficiency of motor.
In one embodiment of the present utility model, it is preferable that along the radial direction of stator core 120, the bottom of stator slot 124
The distance between the outward flange of stator core 120 Tsy span is 15mm >=Tsy >=8mm.
In this embodiment, referring to Fig. 1 and Fig. 2, bottom to stator slot 124 and between the outward flange of stator core 120
Distance Tsy value optimize design, when obtaining 8mm between 15mm, in this case, the yoke portion of stator has
Thicker thickness, so as to effectively reduce noise, while it ensure that motor 1 has enough electric efficiencies.
In one embodiment of the present utility model, it is preferable that the length Ls of stator core 120 in axial direction value
Scope is 50mm≤Ls≤90mm.
In this embodiment, the value of the length Ls to stator core 120 in axial direction optimizes design, works as value
Scope can effectively reduce noise when 50mm is between 90mm, while cause that the axial length of stator core 120 will not again
Efficiency that is long and then having influence on motor.
In one embodiment of the present utility model, it is preferable that stator core 120 is also included along stator core 120 axially
The multiple stator core layers stacked, the thickness h s of stator core layer span are：hs≤0.3mm.
In this embodiment, stator core 120 is included along the axially stacked multiple stator core layers of stator core 120, fixed
The thickness h s of sub- iron core layer optimizes value, rationally controls the thickness of stator core layer to realize being manufactured into for reasonable controlled motor
This, effectively reduces eddy-current loss, so as to improve electric efficiency.
In one embodiment of the present utility model, it is preferable that the specified running speed of motor 1 is more than or equal to 6000
Rev/min；And/or the maximum running speed of motor is more than or equal to 9000 revs/min；And/or the back electromotive-force constant of motor 1
Ke=E/n, Ke span are 7 volts/(thousand revs/min)≤Ke≤36 volt/(thousand revs/min), wherein, E is the lead-out wire of motor 1
Back-emf virtual value between terminal, the rotating speed of n magnetoes 1.
In this embodiment, the specified running speed of motor 1 is set greater than or equal to 6000 revs/min, makes motor 1
High-speed rotation, so as to improve electric efficiency, the loss of energy is reduced, referring to Figure 12；And/or the maximum running speed of motor is more than
Or equal to 9000 revs/min, higher power can be reached；And/or the back electromotive-force constant Ke of motor 1 value is set in 7
Volt/(thousand revs/min) to 36 volts/(thousand revs/min) between so that motor 1 obtains enough electric currents, ensure that motor 1 has enough turn
Square, improve motor 1 efficiency, wherein the back electromotive-force constant of motor for motor extractions line terminals between back-emf virtual value and
The ratio of the rotating speed of motor.
In specific embodiment, the specified running speed of motor is more than or equal to 6000 revs/min, and the extraction of motor
Back-emf virtual value between line terminals is E volts, when motor rotating speed for thousand revs/min of n when, the back electromotive-force constant Ke of motor is
E/n, meet 7 volts/(thousand revs/min)≤Ke≤36 volt/(thousand revs/min), to ensure that motor obtains electric current.Further, motor is most
Big running speed is more than or equal to 9000 revs/min.
Second aspect embodiment of the present utility model provides a kind of compressor, including the electricity that any of the above-described embodiment proposes
Machine 1.
According to the compressor in embodiment of the present utility model, there is the electricity that the utility model first aspect embodiment provides
Machine 1, referring to Fig. 5, therefore the compressor has whole beneficial effects of the motor 1 of any of the above-described embodiment offer.
In specific embodiment, the stator tooth 122 and stator slot 124 of magneto along stator core circumference equally spaced
Multiple, the axial direction of the insertion rotor core 142 of magnet slot 144 is disposed with, and is equally spaced along the circumference of rotor core 142
Have multiple.
In specific embodiment, as shown in figure 5, compressor include base bearing, supplementary bearing and be arranged at the base bearing and
Cylinder between the supplementary bearing, piston is provided with the cylinder, and the compressor also has the song being connected with the piston
Axle, the bent axle are assemblied in the endoporus of the rotor of magneto.The magneto is connected by frequency converter with power supply.
In specific implementation, the declared working condition of rare-earth permanent-magnet electric machine 1 is 7200 revs/min, and torque is 6.9Nm, and
Structure as shown in Figures 1 to 4 is respectively provided with, specifically includes stator 12 and rotor 14, stator 12 includes stator core 120 and stator
Winding 126, the stator core 120 include multiple stator tooths 122 along the circumferentially-spaced distribution of the stator, two neighboring institute
State the stator slot 124 limited between stator tooth 122 and the rotor limited by the inner end edge of the multiple stator tooth 122
Receiving portion 128, stator winding 126, which is arranged at rotor in the stator slot 124 and can be rotatably provided in relative to stator 12, to be turned
In sub- receiving portion 128, rotor 14 includes rotor core 142, and multiple magnet slots are provided with circumferentially spacedly on rotor core 142
144, rotor 14 also includes being respectively arranged at multiple magnetic parts 146 in the multiple magnet slot 144, and stator core 120 is along axle
It is Ls to the length in direction, the external diameter of rotor core 142 is Dor, also, in test, the Ls/ of multiple rare-earth permanent-magnet electric machines 1
Dor ratios are respectively：1.176、1.345.
Determined by noise vibration analytical equipment and module, referring to Fig. 6 to Figure 12, respectively illustrated above-mentioned more
Individual motor 1 load and rotating speed be 6000 revs/min with 5400 revs/min when different electric frequencies under the surface of stator core 120
The curve map of vibration acceleration and in the case where rotating speed is 7200 revs/min and rotating speed is 3600 revs/min, torque is 6.9Nm
Electric efficiency comparison diagram.Become in addition, Figure 18 is shown with the Ls/Dor of motor 1 than the cost of motor caused by value changes
The curve map of change.
By Fig. 6 and Fig. 7, it can be seen that with the increase of Ls/Dor ratios, the major section of vibration noise is produced in motor 1
Under, as the vibration acceleration corresponding to 2 times of electric frequencies, 4 times of electric frequencies, the radial vibration acceleration of the stator 12 of motor 1 are equal
Significantly reduce, along with the reduction of motor oscillating, motor 1 is in the motor that rotating speed is 3600rpm and 7200rpm and nominal torque point
Efficiency is suitable with the electric efficiency before optimization；By Figure 18, it can be seen that with the increase of Ls/Dor ratios, the cost of motor increases
Add obvious, and after Ls/Dor is more than 1.345, cost increase compares Ls/Dor=1.176 more than 10 yuan/platform, and the axle of motor
A series of problems are brought to long assembling that can be to compressor of length etc., therefore, Ls/Dor value is preferably less than or equal to
1.345, and for the higher motor of rotating speed, according to primary demand, Ls/Dor value needs to be more than or equal to 1.28
The requirement of noise and loss could be met afterwards.Consider the electric efficiency and motor under radial vibration acceleration, declared working condition
Cost, the Lr/Lor suitable value 1.3 to 1.35 of ratio.Of the present utility model be preferable to carry out is described in detail above in association with accompanying drawing
Mode, still, the utility model are not limited to this.
In summary, the motor that embodiment of the present utility model provides, including include stator including stator and rotor, stator
Iron core and stator winding, stator core include multiple stator tooths of circumferentially-spaced distribution along stator, two neighboring stator tooth it
Between the stator slot limited and the rotor receiving portion limited by the inner end edge of multiple stator tooths, it is fixed that stator winding is arranged at
In pilot trench, rotor is rotatably provided in rotor receiving portion relative to stator；Wherein, the length Ls of stator core in axial direction
Span with the outer diameter D or of stator core ratio is between 1.284 to 1.48, so as to reduce air-gap field fundamental wave
And its each harmonic amplitude, the amplitude of each secondary radial direction electro-magnetic exciting force is effectively reduced, the load armature-reaction of stator side is slackened, reaches
To the effect of reduction motor electromagnetic noise, while motor manufacturing cost is controlled on the premise of electric efficiency is ensured.
In description of the present utility model, term " multiple " then refers to two or more, is limited unless otherwise clear and definite,
The orientation or position relationship of the instructions such as term " on ", " under " are based on orientation shown in the drawings or position relationship, merely to just
In description the utility model and simplified description, rather than indicate or imply that signified device or element must be with specifically square
Position, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model；Term " connection ", " installation ",
" fixation " etc. all should be interpreted broadly, for example, " connection " can be fixedly connected or be detachably connected, or integratedly
Connection；Can be joined directly together, can also be indirectly connected by intermediary.For the ordinary skill in the art,
Concrete meaning of the above-mentioned term in the utility model can be understood as the case may be.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that combining specific features, structure, material or feature that the embodiment or example describe is contained in of the present utility model at least one
In individual embodiment or example.In this manual, identical embodiment is not necessarily referring to the schematic representation of above-mentioned term
Or example.Moreover, specific features, structure, material or the feature of description can be in any one or more embodiments or example
In combine in an appropriate manner.
Preferred embodiment of the present utility model is these are only, is not limited to the utility model, for this area
Technical staff for, the utility model can have various modifications and variations.It is all within the spirit and principles of the utility model,
Any modification, equivalent substitution and improvements made etc., should be included within the scope of protection of the utility model.
Claims (12)
1. a kind of rare-earth permanent-magnet electric machine, the motor includes stator and rotor, it is characterised in that
The stator includes stator core and stator winding, and the stator core is included along the circumferentially-spaced distribution of the stator
The stator slot limited between multiple stator tooths, the two neighboring stator tooth and the inner end edge by the multiple stator tooth
The rotor receiving portion limited, the stator winding are arranged in the stator slot, and the rotor rotates relative to the stator
Ground is arranged in the rotor receiving portion；
The rotor includes rotor core；
Wherein, the length Ls of the stator core in axial direction and the maximum outside diameter Dor of rotor core ratio take
Value scope is：1.284≤Ls/Dor≤1.48.
2. rare-earth permanent-magnet electric machine according to claim 1, it is characterised in that
The length Lr of the rotor core in axial direction and the maximum outside diameter Dor of the rotor core ratio span
For：1.1≤Lr/Dor≤1.6.
3. rare-earth permanent-magnet electric machine according to claim 1, it is characterised in that also include：
Multiple magnet slots are provided with the rotor core circumferentially spacedly；
Wherein, the quantity of the magnet slot pair of the rotor core meets 2≤N≤4, and N is natural number.
4. rare-earth permanent-magnet electric machine according to claim 3, it is characterised in that
The rotor also includes the multiple magnetic parts being respectively arranged in the multiple magnet slot, the bearing of trend of the magnetic part
Perpendicular to the radial direction of the rotor core, and the size hm of radial direction of the magnetic part along rotor core span
For：1.1×(Ris-Ror)≤hm≤5×(Ris-Ror)；
Wherein, Ris is the radius of rotor receiving portion, and Ror is the radius of the rotor core.
5. rare-earth permanent-magnet electric machine according to claim 1, it is characterised in that
Outline of the rotor core perpendicular to the cross section of axial direction is circle.
6. rare-earth permanent-magnet electric machine according to claim 1, it is characterised in that
The rotor core is included along the axially stacked multiple rotor core layers of the rotor core, the thickness of the rotor core layer
Degree hr span be：hr≤0.3mm.
7. rare-earth permanent-magnet electric machine according to any one of claim 1 to 6, it is characterised in that
The radius Ros of the outline of stator core span is Ros >=40mm；And/or
The radius Ris of the rotor receiving portion and the radius Ros of the outline of the stator core ratio span is
0.48≤Ris/Ros≤0.58。
8. rare-earth permanent-magnet electric machine according to any one of claim 1 to 6, it is characterised in that
Along the radial direction of the stator core, the distance between outward flange of the bottom of the stator slot and stator core Tsy
Span be 15mm >=Tsy >=8mm.
9. motor according to any one of claim 1 to 6, it is characterised in that
The length Ls of the stator core in axial direction span is 50mm≤Ls≤90mm.
10. rare-earth permanent-magnet electric machine according to any one of claim 1 to 6, it is characterised in that
The stator core is also included along the axially stacked multiple stator core layers of the stator core, the stator core layer
Thickness h s span is：hs≤0.3mm.
11. rare-earth permanent-magnet electric machine according to any one of claim 1 to 6, it is characterised in that
The specified running speed of the motor is more than or equal to 6000 revs/min；And/or
The maximum running speed of the motor is more than or equal to 9000 revs/min；And/or
The back electromotive-force constant Ke=E/n, the Ke of the motor span are 7 volts/(thousand revs/min)≤Ke≤36 volt/(thousand
Rev/min), wherein, back-emf virtual values of the E between the extraction line terminals of the motor, the rotating speed of motor described in n.
12. a kind of compressor, it is characterised in that including the rare-earth permanent-magnet electric machine as any one of claim 1 to 11.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720764267.7U CN207134963U (en) | 2017-06-28 | 2017-06-28 | Rare-earth permanent-magnet electric machine and compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720764267.7U CN207134963U (en) | 2017-06-28 | 2017-06-28 | Rare-earth permanent-magnet electric machine and compressor |
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| CN207134963U true CN207134963U (en) | 2018-03-23 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107124081A (en) * | 2017-06-28 | 2017-09-01 | 广东美芝制冷设备有限公司 | Rare-earth permanent-magnet electric machine and compressor |
| CN109004780A (en) * | 2017-06-07 | 2018-12-14 | 通用汽车环球科技运作有限责任公司 | Interior permanent magnet machines |
| CN111221300A (en) * | 2018-11-26 | 2020-06-02 | 大隈株式会社 | Numerical control device |
| WO2021157047A1 (en) * | 2020-02-07 | 2021-08-12 | 三菱電機株式会社 | Rotor, electric motor, compressor, refrigeration cycle device, and air conditioning device |
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2017
- 2017-06-28 CN CN201720764267.7U patent/CN207134963U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004780A (en) * | 2017-06-07 | 2018-12-14 | 通用汽车环球科技运作有限责任公司 | Interior permanent magnet machines |
| CN109004780B (en) * | 2017-06-07 | 2020-09-22 | 通用汽车环球科技运作有限责任公司 | Built-in permanent magnet motor |
| CN107124081A (en) * | 2017-06-28 | 2017-09-01 | 广东美芝制冷设备有限公司 | Rare-earth permanent-magnet electric machine and compressor |
| CN107124081B (en) * | 2017-06-28 | 2023-06-20 | 广东美芝制冷设备有限公司 | Rare earth permanent magnet motor and compressor |
| CN111221300A (en) * | 2018-11-26 | 2020-06-02 | 大隈株式会社 | Numerical control device |
| CN111221300B (en) * | 2018-11-26 | 2024-05-28 | 大隈株式会社 | Numerical control device |
| WO2021157047A1 (en) * | 2020-02-07 | 2021-08-12 | 三菱電機株式会社 | Rotor, electric motor, compressor, refrigeration cycle device, and air conditioning device |
| JPWO2021157047A1 (en) * | 2020-02-07 | 2021-08-12 | ||
| JP7389146B2 (en) | 2020-02-07 | 2023-11-29 | 三菱電機株式会社 | Rotors, electric motors, compressors, refrigeration cycle equipment, and air conditioning equipment |
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