CN204145097U - Compressor and motor thereof - Google Patents
Compressor and motor thereof Download PDFInfo
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- CN204145097U CN204145097U CN201420506950.7U CN201420506950U CN204145097U CN 204145097 U CN204145097 U CN 204145097U CN 201420506950 U CN201420506950 U CN 201420506950U CN 204145097 U CN204145097 U CN 204145097U
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Abstract
The utility model discloses a kind of compressor and motor thereof, described motor comprises: stators and rotators, described stator comprises stator core and is wrapped in the stator winding on described stator core, described stator core has multiple stator tooths of spaced apart distribution in the circumference of described stator core, wherein said stator core forms by multiple stator iron plate is stacked, and wherein the thickness θ of each described stator iron plate meets: θ≤0.3mm; Described rotor comprises rotor core and is located at the multiple rotor magnet parts on described rotor core, described rotor core forms by multiple rotor iron plate is stacked, wherein the thickness δ of each described rotor iron plate meets: δ≤0.3mm, the remanent magnetism Br of each described rotor magnet part at 20 DEG C meet: Br > 1.35T.According to motor of the present utility model, by adopting the less rotor iron plate of thickness of slab and the higher rotor magnet part of remanent magnetism, declining while achieving copper loss and iron loss, thus improving electric efficiency.
Description
Technical field
The utility model relates to technical field of motor manufacture, especially relates to a kind of compressor and motor thereof.
Background technology
The brushless motor burying permanent magnet in rotor underground is widely used in the field of household appliances such as compressor of air conditioner because of its higher efficiency.But the efficiency of motor is difficult to get a promotion, its main cause is that the loss caused due to copper loss and iron loss cannot be inhibited.Specifically, the efficiency of motor depends on the loss after combining copper loss and iron loss.If consider with loss, then when the facewidth of stator tooth is less, the loss caused by copper loss accounts for leading, and when the facewidth is larger, the loss caused by iron loss accounts for leading.
In current field of household appliances, electric efficiency has accomplished higher level, namely design has reached the stage of copper loss and iron loss balance, now by changing stator punching shape, no matter be reduce copper loss or iron loss, capital causes the rising of another kind of loss, finally all cannot reach the lifting of electric efficiency.
Utility model content
The utility model is intended at least to solve one of technical problem existed in prior art.For this reason, an object of the present utility model is to propose a kind of motor, and the efficiency of motor is improved.
Another object of the present utility model is to propose a kind of compressor with above-mentioned motor.
According to the motor of the utility model first aspect embodiment, comprise: stator, described stator comprises stator core and is wrapped in the stator winding on described stator core, described stator core has multiple stator tooths of spaced apart distribution in the circumference of described stator core, wherein said stator core forms by multiple stator iron plate is stacked, and wherein the thickness θ of each described stator iron plate meets: θ≤0.3mm; And rotor, described rotor comprises rotor core and is located at the multiple rotor magnet parts on described rotor core, described rotor core forms by multiple rotor iron plate is stacked, wherein the thickness δ of each described rotor iron plate meets: δ≤0.3mm, the remanent magnetism Br of each described rotor magnet part at 20 DEG C meet: Br > 1.35T.
According to the motor of the utility model embodiment, by adopting the less rotor iron plate of thickness of slab and the higher rotor magnet part of remanent magnetism, declining while achieving copper loss and iron loss, thus improving electric efficiency.
Alternatively, the thickness θ of each described stator iron plate meets further: θ=0.3mm, and the thickness δ of each described rotor iron plate meets further: δ=0.3mm.
Alternatively, the remanent magnetism Br of each described rotor magnet part at 20 DEG C meets further: Br=1.38T.
Further, the pole number of described motor is P, and the overall width of every pole lower magnet is bm, the number of described stator tooth is Q, the width of each described stator tooth is t1, and wherein, described t1, bm meet: 0.6P/Q<t1/bm<0.8P/Q.
Alternatively, described t1, bm meet further: t1/bm=0.7P/Q.
Further, the height of described rotor core is L2, and the external diameter of described rotor is D2, and wherein, described L2, D2 meet: 0.9 < L2/D2 < 1.1.
Particularly, described rotor core is formed with the multiple rotor for holding described multiple rotor magnet part.
Alternatively, the shape of each described rotor is " one " font, V-type, U-shaped or W type.
Alternatively, described rotor is positioned at inner side or the outside of described stator.
According to the compressor of the utility model second aspect embodiment, comprise the motor according to the above-mentioned first aspect embodiment of the utility model.
Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the vertical view of the motor according to the utility model embodiment;
Fig. 2 is the stereogram of the motor shown in Fig. 1;
Fig. 3 is the curve chart changed with (Q × t1)/(P × bm) according to the motor of the utility model embodiment and the efficiency of traditional motor;
Fig. 4 is the curve chart changed with L2/D2 according to the motor of the utility model embodiment and the efficiency of traditional motor.Reference numeral:
100: motor;
1: stator; 11: yoke; 12: stator tooth; 121: pole shoe; 13: stator slot;
2: rotor; 21: rotor core; 211: rotor; 22: rotor magnet part.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the utility model, and can not being interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " vertically ", " level ", " top ", " end ", " interior ", " outward ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.In description of the present utility model, except as otherwise noted, the implication of " multiple " is two or more.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For a person skilled in the art, concrete condition the concrete meaning of above-mentioned term in the utility model can be understood.
Describe the motor 100 according to the utility model first aspect embodiment below with reference to Fig. 1-Fig. 4, motor 100 may be used in compressor.Wherein, compressor can be the compressor of household electrical appliance such as air conditioner.
As depicted in figs. 1 and 2, according to the motor 100 of the utility model first aspect embodiment, comprise stator 1 and rotor 2.
Stator 1 comprises stator core and stator winding (scheming not shown), and stator winding is wrapped on stator core, and stator core has multiple stator tooths 12 of spaced apart distribution in the circumference of stator core.
Specifically, stator core comprises yoke 11 and multiple stator tooth 12 of ring-type, yoke 11 is roughly circular, and multiple stator tooth 12 is spaced on the internal perisporium of turning up the soil and being located at yoke 11, and multiple stator tooth 12 is preferably configured in yoke 11 circumferentially equally spacedly.Wherein, each stator tooth 12 can be formed to projecting inward by a part for the internal perisporium of yoke 11.Have the pole shoe 121 along the circumferential direction widened in the inner of each stator tooth 12, in other words, the circumferential width of pole shoe 121 is greater than the circumferential width of corresponding stator tooth 12.Here, it should be noted that, direction " interior " refers to towards the direction at yoke 11 center, and its rightabout is defined as " outward ", namely away from the direction at yoke 11 center.Stator core forms by multiple stator iron plate is stacked.
Limit stator slot 13 between two often adjacent stator tooths 12, stator winding is wrapped on stator core through multiple stator slot 13.Wherein, stator winding can for being generally known as three windings of U, V, W phase.
Multiple rotor magnet parts 22 that rotor 2 comprises rotor core 21 and is located on rotor core 21, multiple rotor magnet part 22 is spaced apart distribution in the circumference of rotor core 21, preferably, rotor 2 separates with S pole and N pole and is equally spaced alternately configured in mode circumferentially and is remained in the circumference of rotor core 21 by the rotor magnet part 22 of multiple number of magnetic poles.Rotor core 21 forms by multiple rotor iron plate is stacked.Alternatively, each rotor magnet part 22 is the rare-earth magnet of high remanent magnetism, and such as rare-earth magnet can adopt sintering process to make, and at 20 DEG C, the magnetic property of this rotor magnet part 22 is: remanent magnetism Br is greater than 1.35T, and HCJ Hcj is greater than 1700kA/m.
Rotor 2 can be positioned at the inner side of stator 1, as depicted in figs. 1 and 2, rotor core 21 is formed with the multiple rotor 211 for holding multiple rotor magnet part 22, multiple rotor 211 is along the spaced apart distribution of circumference of rotor core 21, and the periphery wall of multiple rotor 211 adjacent rotor iron core 21 is arranged.Rotor 2 is configured in the inner circumferential side of stator 1 in the mode that multiple stator tooth 12 is relative with the space that multiple rotor magnet part 22 separates regulation.Certainly, rotor 2 also can be positioned at the outside (scheming not shown) of stator 1.
Alternatively, the shape of each rotor 211 is " one " font, as shown in Figure 1.Certainly, the shape of each rotor 211 can also be V-type, U-shaped or W type etc.Be appreciated that the concrete shape of rotor 211 specifically can be arranged according to actual requirement, the utility model does not do concrete restriction to this.
Wherein, stator core adopts the sheet iron of low iron loss to be laminated, and the thickness θ of each stator iron plate meets: θ≤0.3mm, now P1.5/50 (core loss value namely under 50Hz, 1.5T) is less than 2.7W/kg.What rotor core 21 adopted is that the sheet iron of low iron loss is laminated, and the thickness δ of each rotor iron plate meets: δ≤0.3mm, P1.5/50 (core loss value namely under 50Hz, 1.5T) are less than 2.7W/kg.At 20 DEG C, the remanent magnetism Br of each rotor magnet part 22 meets: Br > 1.35T, HCJ Hcj is greater than 1700kA/m.Thus, copper loss and iron loss can be suppressed simultaneously, realize the significantly lifting of motor 100 efficiency.
In description below the application, see figures.1.and.2, for the number Q of the stator tooth 12 of motor 100 (i.e. the number of stator slot 13) be nine, the number P of the magnetic pole of rotor magnet part 22 is six and is described.
Wherein, the sheet iron of low iron loss that what stator core and rotor core 21 all adopted is is laminated, and its thickness of slab is respectively 0.3mm, and P1.5/50 (core loss value namely under 50Hz, 1.5T) is 2.4W/kg.Because the iron loss of iron core produces primarily of hysteresis effect and eddy current effect, and the reduction of the thinning iron loss for eddy current effect generation of thickness of slab has obvious effect.
What rotor 2 adopted is that at 20 DEG C, remanent magnetism Br is the magnet of 1.38T, and HCJ Hcj is 1800kA/m.Because the remanent magnetism of magnet improves, be provided to the magnetic flux density increase all corresponding to total magnetic flux in stator core, the back electromotive force responded in the stator windings also can correspondingly promote, the torque that same stator 1 electric current exports adds, so when requiring to export same torque, the electric current that stator 1 needs just can decline, and the copper loss produced by stator 1 electric current also reduced.
Square value and the resistance value R of copper loss Wcu and electric current I have proportional relation.Specifically, the relation between copper loss Wcu and electric current I and resistance value R represents with Wcu=RI × I.Like this, when using identical copper cash, copper loss Wcu changes when the square value of electric current I changes.In addition, the torque T of motor and magnetic flux phi and electric current I have simple proportional relation.At this, if increase the width of stator tooth 12, then relative with rotor magnet part 22 relative area increases, and the magnetic flux phi of guiding stator core increases.Like this, when torque T is identical torque, the width of stator tooth 12 is larger, and the electric current of motor is less, and therefore, copper loss Wcu is also less.
Iron loss Wfe and magnetic induction density B and rotating speed f have proportional relation.Like this, when for identical rotating speed f, iron loss Wfe changes when the value of magnetic induction density B changes.At this, the width of stator tooth 12 is larger, is more easy to import magnetic flux, and magnetic induction density B is larger.And because iron loss Wfe and magnetic induction density B have proportional relation, therefore the width of stator tooth 12 is larger, and iron loss Wfe is also larger.
When the magnet remanent magnetism adopted in rotor 2 improves, so in stator core, the magnetic induction density B of stator tooth 12 and yoke 11 can become large, causes iron loss Wfe to become large, unfavorable to improved efficiency.In the utility model, what stator core adopted is that the sheet iron of low iron loss is laminated, and its thickness of slab is 0.3mm, P1.5/50 (core loss value namely under 50Hz, 1.5T) is 2.4W/kg.Its iron loss produced for eddy current effect has inhibitory action, even if so can become large in stator core magnetic induction density B, due to the reduction of thickness of slab, makes core loss value be declined on the contrary.
Thus, according to the motor 100 of the utility model embodiment, by adopting the less rotor iron plate of thickness of slab and the higher rotor magnet part 22 of remanent magnetism, declining while achieving copper loss and iron loss, thus improving motor 100 efficiency.
According to further embodiment of the present utility model, can by limiting to the concrete size of stator core the efficiency improving motor 100 further.
Wherein, the thickness of the iron plate that stator core and rotor core 21 adopt is 0.3mm equally, and what rotor magnet part 22 adopted is that at 20 DEG C, remanent magnetism Br is the magnet of 1.38T.Similarly, the number of stator tooth 12 is nine, and the number of magnet is six.Fig. 3 represents the figure compared adopting above-mentioned motor 100 and the efficiency of traditional motor.Using ratio (Q × t1)/(P × bm) of the overall width Q × t1 of Q the stator tooth 12 and overall width P × bm of each pole magnet as transverse axis, using motor 100 efficiency when changing ratio t1/bm as the longitudinal axis, show motor 100 efficiency when ratio is changed to 0.9 from 0.4.
Wherein, bm is the overall width of every pole lower magnet, such as in the example of fig. 1, when rotor 211 is " one " font, is provided with a rotor magnet part 22 in rotor 211, and now bm is the length of rotor magnet part 22 in the circumference of rotor core 21.T1 is the width of each stator tooth 12.
According to Fig. 3, when ratio (Q × t1)/(P × bm) of motor 100 is for identical value (namely abscissa is identical), according to the efficiency of the motor 100 of the utility model embodiment efficiency higher than traditional motor.
When motor 100 is applied in the compressor of air conditioner, the improved efficiency of general motor 100 is about 0.5%, thus the refrigerating efficiency of compressor has obvious lifting.Preferably, as 0.6< (Q × t1)/(P × bm) <0.8, motor 100 efficiency is higher.Known on the other hand, in the scope (i.e. 0.6< (Q × t1)/(P × bm) <0.8) roughly the same with ratio (Q × t1)/(P × bm), the change of the efficiency of traditional motor is within 0.3%, and its lifting realizing motor 100 efficiency is difficult.
By above-mentioned comparison, by by the iron plate of 0.3mm thickness of slab and the magnet with high remanent magnetism with the use of, the significantly lifting of motor 100 efficiency can be realized.When considering maximizing efficiency, preferably ratio 0.6< (Q × t1)/(P × bm) <0.8, i.e. 0.6P/Q<t1/bm<0.8P/Q.Further preferably, t1/bm=0.7P/Q.
Further, can limit further to improve motor 100 efficiency to the long-pending thick of motor 100 and the concrete size of external diameter.Specifically, (thickness of the iron plate that stator core and rotor core 21 adopt is 0.3mm to other condition equally, what rotor magnet part 22 adopted is that at 20 DEG C, remanent magnetism Br is the magnet of 1.38T, the number of stator tooth 12 is nine, the number of magnet is six) constant, be 0.7 by the ratio set of (Q × t1)/(P × bm).
Fig. 4 is the figure of the efficiency of the motor 100 represented according to the utility model embodiment.Using the ratio L2/D2 of the height L2 of rotor core 21 and the outer diameter D 2 of rotor 2 as transverse axis, using motor 100 efficiency when changing ratio L2/D2 as the longitudinal axis, show motor 100 efficiency when ratio is changed to 1.4 from 0.6.Wherein, stator core and rotor core 21 difference in height can within the scope of ± 5mm.
According to Fig. 4, when the ratio L2/D2 of the motor 100 according to the utility model embodiment is identical value (namely abscissa is identical), according to motor 100 efficiency of the utility model embodiment higher than traditional electric efficiency.
In addition, when ratio is in 0.9 < L2/D2 < 1.1 scope, there is obvious lifting according to the efficiency outside motor 100 efficiency of the utility model embodiment comparatively this scope.
According to the motor 100 of the utility model embodiment, the manufacture of motor 100 is simple, and the lifting of the efficiency of motor 100 can reach 0.5%, thus greatly improves the performance of motor 100.
According to the compressor (scheming not shown) of the utility model second aspect embodiment, comprise the motor 100 according to the above-mentioned first aspect embodiment of the utility model.Wherein, the type of compressor can adaptive change according to the actual requirements, and the utility model does not make particular determination to this.
Be all known according to other configuration examples of the compressor of the utility model embodiment to those skilled in the art as compressing mechanism (comprising base bearing, cylinder and supplementary bearing etc.) etc. and operation, be not described in detail here.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and aim, scope of the present utility model is by claim and equivalents thereof.
Claims (10)
1. a motor, is characterized in that, comprising:
Stator, described stator comprises stator core and is wrapped in the stator winding on described stator core, described stator core has multiple stator tooths of spaced apart distribution in the circumference of described stator core, wherein said stator core forms by multiple stator iron plate is stacked, and wherein the thickness θ of each described stator iron plate meets: θ≤0.3mm; With
Rotor, described rotor comprises rotor core and is located at the multiple rotor magnet parts on described rotor core, described rotor core forms by multiple rotor iron plate is stacked, wherein the thickness δ of each described rotor iron plate meets: δ≤0.3mm, the remanent magnetism Br of each described rotor magnet part at 20 DEG C meet: Br > 1.35T.
2. motor according to claim 1, is characterized in that, the thickness θ of each described stator iron plate meets further: θ=0.3mm, and the thickness δ of each described rotor iron plate meets further: δ=0.3mm.
3. motor according to claim 1, is characterized in that, the remanent magnetism Br of each described rotor magnet part at 20 DEG C meets further: Br=1.38T.
4. the motor according to any one of claim 1-3, it is characterized in that, the pole number of described motor is P, the overall width of every pole lower magnet is bm, the number of described stator tooth is Q, the width of each described stator tooth is t1, and wherein, described t1, bm meet: 0.6P/Q<t1/bm<0.8P/Q.
5. motor according to claim 4, is characterized in that, described t1, bm meet further: t1/bm=0.7P/Q.
6. motor according to claim 5, is characterized in that, the height of described rotor core is L2, and the external diameter of described rotor is D2, and wherein, described L2, D2 meet: 0.9 < L2/D2 < 1.1.
7. motor according to claim 1, is characterized in that, described rotor core is formed with the multiple rotor for holding described multiple rotor magnet part.
8. motor according to claim 1, is characterized in that, the shape of each described rotor is " one " font, V-type, U-shaped or W type.
9. motor according to claim 1, is characterized in that, described rotor is positioned at inner side or the outside of described stator.
10. a compressor, is characterized in that, comprises the motor according to any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420506950.7U CN204145097U (en) | 2014-09-03 | 2014-09-03 | Compressor and motor thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420506950.7U CN204145097U (en) | 2014-09-03 | 2014-09-03 | Compressor and motor thereof |
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| Publication Number | Publication Date |
|---|---|
| CN204145097U true CN204145097U (en) | 2015-02-04 |
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| CN201420506950.7U Active CN204145097U (en) | 2014-09-03 | 2014-09-03 | Compressor and motor thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167835A (en) * | 2014-09-03 | 2014-11-26 | 广东美芝制冷设备有限公司 | Compressor and motor thereof |
| CN110768423A (en) * | 2018-07-27 | 2020-02-07 | 广东美芝制冷设备有限公司 | Permanent magnet motor of compressor and compressor |
| CN110768401A (en) * | 2018-07-25 | 2020-02-07 | 广东美芝制冷设备有限公司 | Motor, compressor and refrigeration plant |
-
2014
- 2014-09-03 CN CN201420506950.7U patent/CN204145097U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167835A (en) * | 2014-09-03 | 2014-11-26 | 广东美芝制冷设备有限公司 | Compressor and motor thereof |
| CN110768401A (en) * | 2018-07-25 | 2020-02-07 | 广东美芝制冷设备有限公司 | Motor, compressor and refrigeration plant |
| CN110768423A (en) * | 2018-07-27 | 2020-02-07 | 广东美芝制冷设备有限公司 | Permanent magnet motor of compressor and compressor |
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