CN208028676U - A kind of compressor electric motor and refrigeration equipment - Google Patents
A kind of compressor electric motor and refrigeration equipment Download PDFInfo
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- CN208028676U CN208028676U CN201721910296.6U CN201721910296U CN208028676U CN 208028676 U CN208028676 U CN 208028676U CN 201721910296 U CN201721910296 U CN 201721910296U CN 208028676 U CN208028676 U CN 208028676U
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Abstract
The utility model discloses a kind of compressor electric motor and refrigeration equipments.The compressor electric motor includes that stator assembly and rotor assembly, rotor assembly includes hollow rotor core and the axle sleeve that coordinate with rotor core, and axle sleeve is embedded in rotor core inner-diameter portion and rotor core interference fit；Rotor magnetic steel material is Rare-Earth Magnetic material, and the peripheral surface of rotor core includes the cambered surface of two kinds of different curvature radius, and along the circumferential direction of rotor core, the cambered surface of two kinds of different curvature radius distributes alternately.The utility model is distributed alternately by designing the peripheral surface of hollow rotor core using the cambered surface of two kinds of different curvature radius, by adjusting the length of the cambered surface of different curvature radius, and hollow rotor core inner-diameter portion is using axle sleeve interference fit insertion, substantially reduce the harmonic components in the counter potential waveform of compressor electric motor, make counter potential waveform closer to sine wave, it magnetic moment pulsation is reduced, reduces electromagnetic noise, reasonably optimizing motor.
Description
Technical field
The utility model embodiment is related to Compressor Technology field more particularly to a kind of compressor electric motor and refrigeration equipment.
Background technology
The country of raising with to(for) refrigerator efficiency level with the improvement of people ' s living standards, energy-efficient, the appearance of refrigerator
Product rate increase is the important directions of the following refrigerator development, and core component of the freezer compressor as refrigerator, efficiency and volume are
Whether refrigerator realizes whether energy-efficient, plot ratio being capable of increased important indicator.And the height of compressor electric motor and it is outer straight
Connect the size that decide compressor.
The primary structure of existing freezer compressor variable-frequency motor is that stator winding uses concentratred winding or Distributed Winding, is turned
Sub- iron core uses ferrite material, stator to use copper wire or aluminum steel enameled wire.Because the magnetic property of ferrite material inherently is inclined
It is low, in order to ensure that the intensity in magnetic field, the volume of rotor can not reduce.Rotor magnetic attraction is low, during overcoming piston stroke
Torque changes, and needs the rotary inertia of rotor bigger, and the radial dimension for being unfavorable for rotor reduces, thus stator dimensions can not
It reduces.Moreover, compressor electric motor in refrigerator is axial vertically-mounted, in order to overcome the dead weight resistance and to greatest extent of rotor
Using the magnetic field of stator end, the height of rotor is higher than stator, therefore is unfavorable for the attenuating of compressor complete machine height.
Utility model content
A kind of compressor electric motor of the utility model offer and refrigeration equipment, to realize compressor electric motor miniaturization, high efficiency,
The weight of compressor electric motor is alleviated, and the electric and magnetic oscillation noise of compressor electric motor can be effectively improved.
In a first aspect, the utility model embodiment provides a kind of compressor electric motor, which includes stator pack
Part and rotor assembly；
The rotor assembly includes hollow rotor core and the axle sleeve that coordinates with the rotor core, and the axle sleeve is embedding
Enter the rotor core inner-diameter portion to be interference fitted with the rotor core；
Magnetic steel material is Rare-Earth Magnetic material in the rotor assembly, and the peripheral surface of the rotor core includes two kinds of different curvatures
The cambered surface of radius, along the circumferential direction of the rotor core, the cambered surface of described two different curvature radius distributes alternately.
Specifically, the cambered surface of described two different curvature radius is respectively the first cambered surface and the second cambered surface；First arc
The radius of curvature in face is less than the radius of curvature of second cambered surface；
The part composition first that the section of the rotor core radially corresponds to first cambered surface is fan-shaped, described turn
The part that the section of sub- iron core radially corresponds to second cambered surface constitutes the second sector；
Wherein, the endpoint of the circular arc in first sector is respectively first end point and the second endpoint, by described first
Endpoint and the straight line in the center of circle corresponding to second sector are first straight line, fan-shaped with described second by second endpoint
The straight line in the corresponding center of circle is second straight line, the ranging from 38/P of the first straight line and acute angle theta folded by the second straight line
≤ θ≤82/P, wherein P are the number of pole-pairs of the compressor electric motor of refrigeration equipment.
Specifically, the radius of curvature of the radius of curvature of first cambered surface and second cambered surface and the motor d axis and q
The angle relation of axis.
Specifically, the stator module further includes：
Stator winding, the stator winding use sine windings.
Specifically, the rotor core is formed using the electromagnetic steel plate superposition rolling of 0.25-0.35mm.
Specifically, the internal diameter of the rotor core and the ratio of outer diameter are between 0.5~0.7.
Specifically, the magnetic moment pulsation of the compressor electric motor is less than or equal to 0.05Nm.
Specifically, the axle sleeve includes outer shaft and internal axle sleeve, the material identical of the outer shaft and the internal axle sleeve or
Person is different.
Specifically, the stator module uses 4 pole, 6 slot structure.
Second aspect, the utility model embodiment additionally provide a kind of refrigeration equipment, which includes that this practicality is new
The compressor electric motor for the refrigeration equipment that type any embodiment provides.
The utility model uses the cambered surface phase of two kinds of different curvature radius by designing the peripheral surface of hollow rotor core
Between be distributed, use axle sleeve mistake by adjusting the length of the cambered surface of different curvature radius and hollow rotor core inner-diameter portion
Be full of cooperation insertion, substantially reduce the harmonic components in the counter potential waveform of compressor electric motor, make counter potential waveform closer to
Sine wave reduces magnetic moment pulsation, reduces electromagnetic noise, reasonably optimizing motor.
Description of the drawings
Fig. 1 is that a kind of radial direction stator assembly and rotor assembly for compressor electric motor that the utility model embodiment provides is cutd open
Face structural schematic diagram；
Fig. 2 is a kind of front view of the three-dimensional structure for axle sleeve that the utility model embodiment provides；
Fig. 3 is a kind of left view of the three-dimensional structure for axle sleeve that the utility model embodiment provides；
Fig. 4 is a kind of structural schematic diagram for rotor assembly that the utility model embodiment provides；
Fig. 5 is a kind of three dimensional structure diagram for rotor assembly that the utility model embodiment provides；
Fig. 6 is the three dimensional structure diagram for another rotor assembly that the utility model embodiment provides；
Fig. 7 is a kind of three dimensional structure diagram for stator that the utility model embodiment provides；
Fig. 8 is a kind of three dimensional structure diagram for rotor core that the utility model embodiment provides；
Counter potential waveform schematic diagram when Fig. 9 is a kind of difference θ values of the utility model embodiment offer；
Figure 10 is the structural schematic diagram of a kind of stator and winding that the utility model embodiment provides；
Corresponding magnetic moment pulsation signal when being 14 that Figure 11 is the rotor core internal diameter Φ 1 that the utility model embodiment provides
Figure；
Corresponding magnetic moment pulsation signal when being 20 that Figure 12 is the rotor core internal diameter Φ 1 that the utility model embodiment provides
Figure；
Corresponding magnetic moment pulsation signal when being 25 that Figure 13 is the rotor core internal diameter Φ 1 that the utility model embodiment provides
Figure；
Corresponding magnetic moment pulsation signal when being 30 that Figure 14 is the rotor core internal diameter Φ 1 that the utility model embodiment provides
Figure；
Figure 15 is that the corresponding back-emf of different rotor internal diameter, magnetic moment pulsation and flux that the utility model embodiment provides are close
The variation tendency schematic diagram of degree.
Specific implementation mode
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for
It is bright, it illustrates only for ease of description, in attached drawing and the relevant part of the utility model rather than entire infrastructure.
Fig. 1 is that a kind of radial direction stator assembly and rotor assembly for compressor electric motor that the utility model embodiment provides is cutd open
Face structural schematic diagram, Fig. 2 are a kind of front views of the three-dimensional structure for axle sleeve that the utility model embodiment provides, and Fig. 3 is this reality
With a kind of left view of the three-dimensional structure of axle sleeve of new embodiment offer, Fig. 4 is one kind that the utility model embodiment provides
The structural schematic diagram of rotor assembly, shown as shown in Figure 1, Figure 2, Figure 3 and Figure 4, which includes：
Stator module 110 and rotor assembly 120；Rotor assembly 120 include hollow rotor core 121 and with rotor iron
The axle sleeve 130 of core cooperation, axle sleeve 130 are embedded in 121 inner-diameter portion of rotor core and are interference fitted with rotor core 121.
Magnetic steel material is Rare-Earth Magnetic material in rotor assembly 120, and the peripheral surface of rotor core 121 includes two kinds of different curvatures half
The cambered surface of diameter, along the circumferential direction of rotor core 121, the cambered surface of two kinds of different curvature radius distributes alternately.
As shown in Figures 2 and 3, the shape of the peripheral surface of axle sleeve 130 is identical as the hollow profile of rotor core 121, axle sleeve
The 130 hollow shaft for being embedded in rotor core 121.Axle sleeve 130 is embedded in 121 inner-diameter portion of rotor core and rotor core
When 121 interference fit, the outer diameter of axle sleeve 130 is more than the internal diameter of rotor core 121.When axle sleeve 130 is embedded in 121 internal diameter of rotor core
When, many kinds of measures can be taken to be embedded in, such as special tool(s) extruding may be used and enter, or utilize the spy expanded with heat and contract with cold
Property, rotor core 121 is heated, axle sleeve 130 is embedded in rapidly by internal diameter when expanding, contraction rear axle housing 130 to be cooled and rotor iron
Core 121 just tightly matches integrator.Also axle sleeve 130 can be cooled down, effect is consistent.
Fig. 5 is a kind of three dimensional structure diagram for rotor assembly that the utility model embodiment provides, and Fig. 6 is that this practicality is new
The three dimensional structure diagram for another rotor assembly that type embodiment provides.As shown in Figure 2, Figure 5 and Figure 6, axle sleeve 130 includes outer
The material of axle sleeve 131 and internal axle sleeve 132, outer shaft 131 and internal axle sleeve 132 can be identical and different.Outer shaft in axle sleeve 130
131 internal diameter is equal with the outer diameter of internal axle sleeve 132, and outer shaft 131 and internal axle sleeve 132 are bonded as axle sleeve 130, internal axle sleeve 132
Hollow parts are for being embedded in rotor shaft.Outer shaft 131 and the material of internal axle sleeve 132 may be the same or different.Work as outer shaft
When the material identical of set 131 and internal axle sleeve 132, magnetic steel material can be selected as.When the material of outer shaft 131 and internal axle sleeve 132
When different, the material of outer shaft 131 can be selected as synthetic material, such as can be nylon.The material of internal axle sleeve 132 can select
It is selected as magnetic steel material.The inner wall of internal axle sleeve 131 can be smooth, can also be including multiple saws being evenly distributed on inner wall
Tooth, axle sleeve 130 are engaged transmission by the sawtooth on internal axle sleeve 132 with rotor shaft realization.
Compressor electric motor power is smaller, and the dominant loss for influencing motor performance is iron loss.Iron loss refers to silicon steel sheet in excitation
The part energy itself consumed under state.Think that iron loss is substantially equal to no-load loss in engineering, theoretically iron loss=zero load
Loss-windmill consumption-zero load stray loss.Iron loss is divided into as eddy-current loss and magnetic hystersis loss.
In order to reduce eddy-current loss, sheet metal may be used.Illustratively, 0.25- may be used in rotor core 121
The electromagnetic steel plate superposition rolling of 0.35mm is formed, and to reduce eddy current, effectively reduces eddy-current loss.In selection electromagnetic steel
When the thickness of plate, it should be selected according to air gap flux density.Air gap flux density should not be too high, but utilization that is too low and can influencing material
Rate, therefore suitable air gap flux density is selected, so that it is determined that the thickness of electromagnetic steel plate.
The principal element for influencing magnetic hystersis loss is two aspects of running frequency and flux density.Flux density is unit area
Interior magnetic field intensity compares the performance of the electromagnetic steel plate of selection, and flux density domination is relatively slow in relatively more linear and ascensional range
Section, magnetic hystersis loss can be effectively reduced, to reduce iron loss.In addition, the magnet steel portion of the rotor assembly 120 of compressor electric motor
When dividing using rare earth material, compared with traditional ferrite motor, flux density can decline 1.8% or so, therefore reduce
Magnetic hystersis loss reduces iron loss, to improve the efficiency of compressor electric motor.
As shown in figure 4, further including 4 magnetic slots 124 on rotor assembly 120, permanent magnetic field is formed for being inserted into magnet steel.Turn
The material of the magnet steel part of sub-component 120 is rare earth material, such as neodymium iron boron, magnetic energy product (refer to any point on demagnetizing curve
Magnetic flux density B and magnetic field intensity H product, that is, BH, be weigh magnet stored by energy size one of important parameter.) apparent
Higher than previous Ferrite Material, the volume of rotor assembly 120 can be effectively reduced.Compressor electric motor is axial vertical peace
Dress, makes magnetic energy product improve using rare earth material, can reduce rotor assembly 120 and stator module 110 in equal-wattage
Height.Under normal circumstances, under equal-wattage, the magnet steel part of rotor assembly 120 uses the rotor of the motor of rare earth material
The height of component 120 lower than the height of the rotor assembly of the motor of Ferrite Material 30~35%, the height drop of stator module 110
Low 20%.Motor uses rare earth material, and the magnetic attraction of rotor core 121 is bigger than ferritic magnetic attraction, therefore can be effectively
Overcome the torque fluctuations of piston compressor, the rotary inertia of rotor assembly 120 small.Therefore it can reduce the outer of rotor assembly 120
Diameter, while the outer diameter of stator module 110 can be reduced, so that compressor electric motor overall dimensions minimize.
The inner-diameter portion of hollow rotor core 121 is embedded in using axle sleeve 130 so that axle sleeve 130 turns instead of solid
The inner-diameter portion of sub- iron core.Under normal circumstances, the material hardness of axle sleeve 130 is more than the hardness of 121 material of rotor core, makes motor
Integral hardness improves, and magnetic moment pulsation reduces, and significantly reduces the vibrating noise of motor.For example, the material of rotor core 121 can
To select the electromagnetic steel plate of cold rolled silicon steel material, axle sleeve 130 that can then select 45# steel so that the material hardness of axle sleeve 130 is more than
The material hardness of rotor core 121.
As shown in Figure 1,121 peripheral surface of rotor core includes the cambered surface of two kinds of different curvature radius, two kinds of different curvatures half
The cambered surface of diameter distributes alternately.It is seamlessly transitted between the cambered surface of two kinds of different curvature radius, by adjusting the arc of different curvature radius
The difference of the radius of curvature of the circumferential lengths in face or two kinds of cambered surfaces, can adjust the sinusoidal waveform of the back-emf of compressor electric motor, shape
At harmonic compensation, the waveform of back-emf is made more to level off to sine wave, electromagnetic torque reduces torque pulsation, subtract closer to being constant
The small shake of motor improves the efficiency of motor to effectively improve vibrating noise and loss.
The technical solution of the present embodiment, the arc of two kinds of different curvature radius of peripheral surface by designing hollow rotor core
The difference of the radius of curvature of the circumferential lengths in face or two kinds of cambered surfaces makes the waveform of the back-emf of compressor electric motor level off to sine wave,
Electromagnetic torque closer to be constant, reduce torque pulsation, reduce the shake of motor, to effectively improve vibrating noise and
Loss, improves the efficiency of motor.The inner-diameter portion of axle sleeve insertion rotor core is used on this basis so that motor is integrally hard
Degree improves, and magnetic moment pulsation reduces, and creates a further reduction the vibrating noise of motor.
On the basis of the above embodiments, Fig. 7 is that a kind of three-dimensional structure for stator that the utility model embodiment provides is shown
It is intended to, Fig. 8 is a kind of three dimensional structure diagram for rotor core that the utility model embodiment provides, with reference to figure 1, Fig. 7 and figure
8, stator module 110 uses 4 pole, 6 slot structure.
Stator module 110 can make electricity using 4 pole, 6 slot structure compared with the compressor electric motor of traditional 6 pole, 9 slot structure
Frequency declines 1/3, reduces magnetic hystersis loss, therefore iron loss reduces accordingly therewith.
In addition, when stator module 110 is using 46 slot structure of pole, material is saved than traditional 6 pole, 9 slot structure, and
Under identical output power, motor stator height reduction 20%；Rotor height lowers 30-35%, alleviates motor weight, is reducing
While flux density, iron loss is further effectively reduced.The magnetic moment for reducing complete machine simultaneously is pulsed and shaken and noise.Cause
This, when stator module 110 is using 46 slot structure of pole, although flux density increased, due to using electricity when 46 slot structure of pole
Frequency reduces and the total quality of compressor electric motor reduces, and so that flux density reduces, therefore is integrally considering compressor
When the efficiency of motor, the magnetic hystersis loss of compressor electric motor is reduced using 4 pole, 6 slot structure, improves the efficiency of compressor electric motor,
The performance of compressor electric motor is improved.
The technical solution of the present embodiment uses 4 pole, 6 slot structure by designing stator module, makes the electricity frequency of compressor electric motor
Rate declines, and to reduce the magnetic hystersis loss of compressor electric motor, reduces iron loss, improves the efficiency of compressor electric motor, compresses
The performance of electromechanical machine is improved.
With continued reference to Fig. 4 and Fig. 8, as shown in Figure 4 and Figure 8, the cambered surface of two kinds of different curvature radius is respectively the first cambered surface
122 and second cambered surface 123；The radius of curvature of first cambered surface 122 is less than the radius of curvature of the second cambered surface 123.
The part that the section of rotor core 121 radially corresponds to the first cambered surface 122 constitutes the first sector ABO, rotor
The part that the section of iron core 121 radially corresponds to the second cambered surface 123 constitutes the second sector BCQ.
Wherein, the endpoint of the circular arc on the first sector ABO is respectively first end point A and the second terminal B, by first end point
The straight line of center of circle Q corresponding to the sectors of A and second BCQ is first straight line AQ, right by the second terminal B and the second sector BCQ institutes
The straight line of the center of circle Q answered be second straight line BQ, first straight line AQ and second straight line BQ folded by acute angle theta ranging from 38/P≤θ≤
82/P, wherein P are the number of pole-pairs of compressor electric motor.
The radius of curvature of first cambered surface 122 is less than the radius of curvature of the second cambered surface 123, so the radius of the first cambered surface 122
More than the radius of the second cambered surface 123.First cambered surface 122 forms the salient pole of rotor core 121, the symmetry axis shape of the first cambered surface 122
At the d axis of rotor core 121, the symmetry axis of the second cambered surface 123 forms the q axis of rotor core 121.The center of first cambered surface 122
It is overlapped with the center of circle of the inner-diameter portion of rotor core 121, is all O points.The center Q of second cambered surface 123 is in d axis along rotor core
On extended line on the direction of the center of circle O of 121 inner-diameter portion, it is h that distance O points, which have a certain distance, distance,.First cambered surface
Two endpoints of 122 arc length and the center Q composition angle thetas of the second cambered surface 123 make compressor electric motor by adjusting the size of θ
Back-emf waveform closer to sine wave, electromagnetic torque reduces torque pulsation, reduces trembling for motor closer to being constant
It is dynamic, to effectively improve vibrating noise and loss, improve the efficiency of motor.
Counter potential waveform schematic diagram when Fig. 9 is a kind of difference θ values of the utility model embodiment offer.As shown in figure 9, logical
It crosses and chooses different θ values, the oscillogram of back-emf changes.In fig.9, abscissa is different on the circumference of rotor core 121
Point, ordinate are the values of back-emf.In the different schemes for changing θ values, ensure that the other parameters of motor are consistent, such as motor
Load current, the pole slot structure of rotor and winding style etc., to ensure that the waveform change of the back-emf in different schemes is by θ
What the change of value determined.When selection number of pole-pairs P is 2, the θ values in scheme 1 are 41 °, and θ values are 21 ° in scheme 2, θ values in scheme 3
It it is 35 °, θ values are 28 ° in scheme 4.It can thus be seen that the harmonic components of the waveform of back-emf in scheme 4 are minimum.It therefore can
With by change θ values adjust compressor electric motor back-emf waveform, when θ values be 28 ° constantly, the waveform of back-emf levels off to just
String wave, closer electromagnetic torque is constant, therefore can reduce torque pulsation, reduces the shake of motor, to effectively change
It has been apt to vibrating noise and loss, has improved the efficiency of motor.
The technical solution of the present embodiment makes the waveform of the back-emf of compressor electric motor closer to sine by adjusting θ values
Wave, electromagnetic torque reduce torque pulsation, reduce the shake of motor, make an uproar to effectively improve vibration closer to being constant
Sound and loss improve the efficiency of motor.
It, can be by adjusting the first arc after the number of pole-pairs P for determining compressor electric motor on the basis of above-mentioned each embodiment
The distance between the length of the circular arc in face 122 or the first fan-shaped center of circle corresponding with the second sector h adjust θ values.
θ values are determined by the arc length and radius of the first cambered surface 122 and the second cambered surface 123 it can be seen from Fig. 4 and Fig. 8
Fixed, the arc length of the first cambered surface 122 determines the distance between first end point A and the second terminal B, the half of the first cambered surface 122
Diameter and the radius of the second cambered surface 123 determine that the distance between the first sector ABO and the second corresponding centers of circle sector BCQ h's is big
It is small.Therefore the radius of curvature of the first cambered surface 122 and the radius of curvature of the second cambered surface 123 and the first cambered surface 122 and the second cambered surface
The relationship of 123 radius of curvature is related with θ values, i.e. the angle relation with the d axis and q axis of compressor electric motor.
On the basis of above-mentioned each embodiment, Figure 10 is a kind of stator that the utility model embodiment provides and winding
Structural schematic diagram.As shown in Figure 10, stator module further includes 111 (not shown) of stator winding, and stator winding 111 is using just
Chorded winding.
Using sine windings, the harmonic wave in composite magnetic power is significantly weakened, therefore the waveform of the back-emf in motor
Middle harmonic components are also reduced, and to reduce torque pulsation, the shake of motor are reduced, to effectively improve vibrating noise
And loss, improve the efficiency of motor.
On the basis of the above embodiments, with continued reference to Fig. 4, as shown in figure 4, the internal diameter Φ 1 and outer diameter of rotor core 121
The ratio of Φ 2 is between 0.5~0.7.
When rotor diameter Φ 2 is constant, when expanding the internal diameter Φ 1 of rotor core 121, it is possible to reduce rotor core 121
The usage amount of electromagnetic steel plate, therefore the flux density of rotor core 121 and the iron loss influence that weight band is next can be balanced, but also
Iron loss minimizes.Simultaneously as rotor core 121 uses rare-earth permanent magnet, there is high energy product and high-coercive force, therefore subtracting
It can ensure magnetic field intensity when the usage amount of few electromagnetic steel plate, while can fully realize the miniaturization of motor, effectively take into account existing
Compressor arrangement.
Constant in rotor diameter Φ 2, when being 49, Figure 11 is the rotor core internal diameter Φ 1 that the utility model embodiment provides
Corresponding magnetic moment is pulsed schematic diagram when being 14, and Figure 12 is the rotor core internal diameter Φ 1 that the utility model embodiment provides when being 20
Corresponding magnetic moment is pulsed schematic diagram, and it is corresponding when being 25 that Figure 13 is the rotor core internal diameter Φ 1 that the utility model embodiment provides
Magnetic moment is pulsed schematic diagram, Figure 14 is the rotor core internal diameter Φ 1 that the utility model embodiment provides corresponding magnetic moment arteries and veins when being 30
Dynamic schematic diagram.After selected θ values, when not changing the other parameters of compressor electric motor of refrigeration equipment, change rotor core 121
Internal diameter Φ 1 value, observe the longitudinal axis magnetic moment pulsation value.As shown in Figure 11 to 14, abscissa is the circle of rotor core 121
Point on week, ordinate are magnetic moment pulsating quantities, when the internal diameter Φ 1 of rotor core 121 is 14 it can be seen from Figure 11 to Figure 14
When, magnetic moment pulsation is 0.037Nm, and when the internal diameter Φ 1 of rotor core 121 is 20, magnetic moment pulsation is 0.037Nm, when rotor iron
When the internal diameter Φ 1 of core 121 is 25, magnetic moment pulsation is 0.030Nm, when the internal diameter Φ 1 of rotor core 121 is 30, magnetic moment pulsation
For 0.024Nm, magnetic moment pulsation at this time is smaller.It is thereby possible to select the internal diameter Φ 1 of rotor core 121 is 30, outer diameter Φ 2 is 49,
The ratio of internal diameter Φ 1 and outer diameter Φ 2 is 0.6 or so at this time, and magnetic moment pulsation is minimum.
Figure 15 is that the corresponding back-emf of different rotor internal diameter, magnetic moment pulsation and flux that the utility model embodiment provides are close
The variation tendency schematic diagram of degree, when rotor diameter Φ 2 is 49, as shown in figure 15, horizontal axis is the internal diameter Φ 1 of rotor core 121
Value, the internal diameter Φ 1 of rotor core 121 is using the insertion design of axle sleeve 130.Wherein, curve 101 is that different rotor internal diameter is corresponding anti-
The change trend curve of potential, curve 102 are the change trend curve of the corresponding magnetic moment pulsation of different rotor internal diameter, curve 103
It is the change trend curve of the corresponding flux density of different rotor internal diameter.As can be seen that with the internal diameter Φ 1 of rotor core 121
Increase, magnetic moment pulsating quantity constantly reduces.In the process, back-emf has certain downward trend, but range of decrease slope is less than magnetic
The downward trend of square pulsation.In addition, it can be seen that the internal diameter Φ 1 with rotor core 121 increases, though flux density has rising,
It is also the more slow trend of slope, therefore can be by flux density domination in relatively linear and more slow ascensional range section.It is comprehensive
Back-emf, magnetic moment are pulsed and the variation tendency of flux density, and when the internal diameter Φ 1 of rotor core 121 is 30, compressor electric motor reaches
Efficiency peak is arrived, the internal diameter Φ 1 for thus selecting rotor core 121 is 30, and outer diameter Φ 2 is 49, internal diameter Φ 1 and outer diameter Φ 2
Ratio be 0.6 or so.
When the magnet steel part of rotor assembly 120 material be terres rares, outer diameter Φ 2 be 49 when, rotor core 121 it is interior
Diameter Φ 1 is 30, and when the inner-diameter portion of rotor core 121 is not embedded in axle sleeve 130, magnetic moment pulsation is 0.024Nm.Therefore work as rotor iron
When the inner-diameter portion insertion axle sleeve 130 of core 121 designs, magnetic moment pulsation is less than 0.024Nm.It follows that selected rotor core 121
Internal diameter Φ 1 be 30 after, the pulsation of the magnetic moment of compressor electric motor is less than or equal to 0.024Nm.
The technical solution of the present embodiment, by designing the internal diameter of rotor core, comprehensive back-emf, magnetic moment pulsation and flux are close
The variation tendency of degree chooses rotor core internal diameter at this time as compressor when the efficiency of compressor electric motor peaks
The internal diameter of the rotor core of motor to improve the efficiency of compressor electric motor, and improves the magnetic hystersis loss of compressor electric motor.
The utility model embodiment additionally provides a kind of refrigeration equipment, which includes any implementation of the utility model
The compressor electric motor for the refrigeration equipment that example provides.For example, refrigeration equipment can be refrigerator, can also be other similar small-sized systems
Cool equipment.
Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, can carry out for a person skilled in the art various bright
Aobvious variation is readjusted and is substituted without departing from the scope of protection of the utility model.Therefore, although passing through above example
The utility model is described in further detail, but the utility model is not limited only to above example, is not departing from
Can also include other more equivalent embodiments in the case that the utility model is conceived, and the scope of the utility model is by appended
Right determine.
Claims (10)
1. a kind of compressor electric motor, which is characterized in that including stator assembly and rotor assembly；The rotor assembly includes hollow
Rotor core and the axle sleeve coordinated with the rotor core, the axle sleeve are embedded in the rotor core inner-diameter portion and described turn
Sub- iron core interference fit；
Magnetic steel material is Rare-Earth Magnetic material in the rotor assembly, and the peripheral surface of the rotor core includes two kinds of different curvature radius
Cambered surface, along the circumferential direction of the rotor core, the cambered surface of described two different curvature radius distributes alternately.
2. compressor electric motor according to claim 1, which is characterized in that
The cambered surface of described two different curvature radius is respectively the first cambered surface and the second cambered surface；The radius of curvature of first cambered surface
Less than the radius of curvature of second cambered surface；
The part that the section of the rotor core radially corresponds to first cambered surface constitutes the first fan-shaped, rotor iron
The part that the section of core radially corresponds to second cambered surface constitutes the second sector；
Wherein, the endpoint of the circular arc in first sector is respectively first end point and the second endpoint, by the first end point
Straight line with the center of circle corresponding to second sector is first straight line, right by second endpoint and the described second fan-shaped institute
The straight line in the center of circle answered is second straight line, ranging from 38/P≤θ of acute angle theta folded by the first straight line and the second straight line≤
82/P, wherein P are the number of pole-pairs of refrigerator compressor motor.
3. compressor electric motor according to claim 2, which is characterized in that the radius of curvature of first cambered surface and described
The angle relation of the radius of curvature of two cambered surfaces and the motor d axis and q axis.
4. compressor electric motor according to claim 1, which is characterized in that the stator module further includes：
Stator winding, the stator winding use sine windings.
5. compressor electric motor according to claim 1, which is characterized in that the rotor core is using 0.25-0.35mm's
Electromagnetic steel plate superposition rolling is formed.
6. compressor electric motor according to claim 1, which is characterized in that the internal diameter of the rotor core and the ratio of outer diameter
Between 0.5~0.7.
7. compressor electric motor according to claim 6, which is characterized in that the pulsation of the magnetic moment of the compressor electric motor is less than etc.
In 0.05Nm.
8. compressor electric motor according to claim 1, which is characterized in that the axle sleeve includes outer shaft and internal axle sleeve, institute
State the material identical or difference of outer shaft and the internal axle sleeve.
9. compressor electric motor according to claim 1, which is characterized in that the stator module uses 4 pole, 6 slot structure.
10. a kind of refrigeration equipment, which is characterized in that include the compressor electric motor of any refrigeration equipments of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721910296.6U CN208028676U (en) | 2017-12-30 | 2017-12-30 | A kind of compressor electric motor and refrigeration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721910296.6U CN208028676U (en) | 2017-12-30 | 2017-12-30 | A kind of compressor electric motor and refrigeration equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208028676U true CN208028676U (en) | 2018-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721910296.6U Active CN208028676U (en) | 2017-12-30 | 2017-12-30 | A kind of compressor electric motor and refrigeration equipment |
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| CN (1) | CN208028676U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968505A (en) * | 2017-12-30 | 2018-04-27 | 苏州爱知科技有限公司 | A kind of compressor electric motor and refrigeration plant |
| CN112510871A (en) * | 2020-11-12 | 2021-03-16 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor core, rotor structure, motor, compressor and electric appliance with same |
| CN112653273A (en) * | 2020-12-23 | 2021-04-13 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor and compressor |
-
2017
- 2017-12-30 CN CN201721910296.6U patent/CN208028676U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968505A (en) * | 2017-12-30 | 2018-04-27 | 苏州爱知科技有限公司 | A kind of compressor electric motor and refrigeration plant |
| CN112510871A (en) * | 2020-11-12 | 2021-03-16 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor core, rotor structure, motor, compressor and electric appliance with same |
| CN112653273A (en) * | 2020-12-23 | 2021-04-13 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor and compressor |
| CN112653273B (en) * | 2020-12-23 | 2022-04-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor and compressor |
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