CN204145242U - Rotary compressor and external rotor electric machine thereof - Google Patents
Rotary compressor and external rotor electric machine thereof Download PDFInfo
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- CN204145242U CN204145242U CN201420519429.7U CN201420519429U CN204145242U CN 204145242 U CN204145242 U CN 204145242U CN 201420519429 U CN201420519429 U CN 201420519429U CN 204145242 U CN204145242 U CN 204145242U
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Abstract
The utility model discloses a kind of rotary compressor and external rotor electric machine thereof, external rotor electric machine comprises: stator, and stator comprises stator core and stator winding, and stator core has multiple stator tooth, and stator winding is wrapped on stator core; And rotor, rotor is located at outside stator, rotor comprises rotor core and multiple rotor magnet part, multiple rotor magnet part is located on the internal face of rotor core, each rotor magnet part is ferrite permanent-magnet ironware, number of stator slots is Ns, rotor number of poles is Nr, Ns/Nr meets: Ns/Nr=3/2, and wherein, the distance between the outer peripheral face of rotor magnet part and the periphery wall of rotor core is r, the thickness of each rotor magnet part is m, the width of each stator tooth is t, m/r, t/r meets respectively: 1.7≤m/r≤2.3,1.75≤t/r≤2.4.Described rotary compressor comprises above-mentioned external rotor electric machine.The Driving Torque of external rotor electric machine of the present utility model is higher and iron loss is lower, can increase the electric efficiency of external rotor electric machine.
Description
Technical field
The utility model relates to Compressor Technology field, especially relates to a kind of rotary compressor and external rotor electric machine thereof.
Background technology
In prior art, for the compressor with external rotor electric machine, external rotor electric machine is while the high Driving Torque of pursuit, and its loss of electric machine especially iron loss also can increase fast, causes electric efficiency to reduce, therefore needs improvement.
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 the higher external rotor electric machine for rotary compressor of a kind of efficiency.
Another object of the present utility model is to propose a kind of rotary compressor with the above-mentioned external rotor electric machine for rotary compressor.
According to the external rotor electric machine for rotary compressor of the present utility model, comprise: stator, described stator comprises stator core and stator winding, described stator core has the multiple stator tooth be spaced apart from each other in the circumference of described stator core, limit stator slot between two often adjacent described stator tooths, described stator winding is wrapped on described stator core through described multiple stator slot, and rotor, described rotor is located at outside described stator, described rotor comprises rotor core and multiple rotor magnet part, described multiple rotor magnet part is located on the internal face of described rotor core, each described rotor magnet part is ferrite permanent-magnet ironware, number of stator slots is Ns, rotor number of poles is Nr, described Ns/Nr meets: Ns/Nr=3/2, wherein, distance between the outer peripheral face of described rotor magnet part and the periphery wall of described rotor core is r, the thickness of each described rotor magnet part is m, the width of each described stator tooth is t, described m/r, t/r meets respectively: 1.7≤m/r≤2.3, 1.75≤t/r≤2.4.
According to the external rotor electric machine for rotary compressor of the present utility model, the Driving Torque of external rotor electric machine is higher and iron loss is lower, thus can increase the electric efficiency of external rotor electric machine.
In an embodiment of the present utility model, described t/r meets further: 1.8≤t/r≤2.4.
In an embodiment of the present utility model, described rotor core has the multiple projection be spaced apart from each other in the circumference of described rotor core, and limit mounting groove between two often adjacent described projections, described rotor magnet part is located in described mounting groove.
In an embodiment of the present utility model, described multiple projection and described rotor core one-body molded.
In an embodiment of the present utility model, each described rotor magnet part is bonding or be riveted in corresponding described mounting groove respectively.
In an embodiment of the present utility model, described stator core forms by multiple stator punching is stacked.
In an embodiment of the present utility model, described stator winding is centralized winding.
According to rotary compressor of the present utility model, comprise the external rotor electric machine for rotary compressor according to above-described embodiment.
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 cross-sectional view of the external rotor electric machine for rotary compressor according to the utility model embodiment;
Fig. 2 is the curve chart of m/r-iron loss & torque × 11.5 of the external rotor electric machine for rotary compressor according to the utility model embodiment;
Fig. 3 is the curve chart of t/r-iron loss & torque × 11.5 of the external rotor electric machine for rotary compressor according to the utility model embodiment.
Reference numeral:
External rotor electric machine 100;
Stator 10; Stator core 11; Stator winding 12; Stator tooth 13; Stator slot 14; Stator yoke 15;
Rotor 20; Rotor core 21; Rotor magnet part 22; Mounting groove 23; Protruding 24; Rotor yoke 25.
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 ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " 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 addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.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 mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition the concrete meaning of above-mentioned term in the utility model can be understood.
Below with reference to Fig. 1 to Fig. 3, the external rotor electric machine 100 for rotary compressor according to the utility model embodiment is described.
According to the external rotor electric machine 100 for rotary compressor of the utility model embodiment, comprising: stator 10 and rotor 20.Wherein, stator 10 comprises stator core 11 and stator winding 12, stator core 11 has the multiple stator tooths 13 be spaced apart from each other in the circumference of stator core 11, limit stator slot 14 between two often adjacent stator tooths 13, stator winding 12 is wrapped on stator core 11 through multiple stator slot 14.Particularly, as shown in Figure 1, stator core 11 comprises stator tooth 13 and stator yoke 15, and the shape of stator yoke 15 is roughly circular, and the cross sectional shape of stator tooth 13 is roughly T-shaped.Multiple stator tooths 13 are connected to the outer peripheral face of stator yoke 15, and multiple stator tooth 13 is along the spaced apart distribution of circumference of stator yoke 15.
Rotor 20 is located at outside stator 10, and rotor 20 comprises rotor core 21 and multiple rotor magnet part 22, and multiple rotor magnet part 22 is located on the internal face of rotor core 21, and each rotor magnet part 22 is ferrite permanent-magnet ironware.Particularly, as shown in Figure 1, rotor 20 is located at the periphery of stator 10, and the shape of rotor core 21 is roughly circular, and rotor magnet part 22 is roughly formed as arc block.Alternatively, multiple rotor magnet part 22 can spaced apartly be located on the internal face of rotor core 21.Alternatively, multiple rotor magnet part 22 can be close to be arranged in rotor core 21 internal face on, in other words, distance between adjacent two rotor magnet parts 22 two adjacent faces is in the circumferential almost nil, and the end face that namely adjacent two rotor magnet parts 22 in the circumferential two are adjacent contacts.Rotor core 21 comprises rotor yoke 25, and rotor yoke 25 is the part between the periphery wall of rotor core 21 and the outer peripheral face of rotor magnet part 22, and the shape of rotor yoke 25 is annular.
Number of stator slots is Ns, and rotor number of poles is that Nr, Ns/Nr meet: Ns/Nr=3/2.Wherein, distance between the outer peripheral face of rotor magnet part 22 and the periphery wall of rotor core 21 is r, namely the thickness (radial dimension in Fig. 1) of rotor yoke 25 is r, the thickness (radial dimension in Fig. 1) of each rotor magnet part 22 is m, the width (circumferential size in Fig. 1) of each stator tooth 13 is t, m/r, t/r meet respectively: 1.7≤m/r≤2.3,1.75≤t/r≤2.4.
Particularly, rotor yoke 25 directly carries the magnetic flux that rotor magnet part 22 produces, and the thickness t of rotor yoke 25 is larger, and rotor yoke 25 more easily carries the magnetic flux that rotor magnet part 22 produces, thus the Driving Torque of external rotor electric machine 100 is larger.But the thickness t of rotor yoke 25 is larger, the volume of external rotor electric machine 100 and the increase of size may be caused.In fig. 2, in order to make the contrast of torque curve and iron loss curve more directly perceived, therefore the numerical value of torque is expanded 11.5 times.For ferrite class external rotor electric machine 100, assuming that stator tooth 13 and stator yoke 15 have larger width, and both magnetic properties are good, now as shown in Figure 2, along with the increase of the ratio (m/r) of the thickness m of rotor magnet the part 22 and thickness r of rotor yoke 25, the Driving Torque of external rotor electric machine 100 and iron loss (iron loss) are in increase tendency.In interval, 1.7≤m/r≤2.3, external rotor electric machine 100 Driving Torque still has good increase tendency, and the iron loss of external rotor electric machine 100 increases slowly.Thus, the ratio of m/r is in this interval, and namely 1.7≤m/r≤2.3, are conducive to the Driving Torque improving external rotor electric machine 100, also inhibits the increase of iron loss simultaneously.
When the ratio m/r of the thickness m of rotor magnet the part 22 and thickness r of rotor yoke 25 is interval [1.7,2.3] time interior, now as shown in Figure 3, along with the increase of the ratio of the thickness r of stator tooth 13 width t and rotor yoke 25, external rotor electric machine 100 Driving Torque and iron loss increase all gradually, in interval 1.75≤t/r≤2.4, along with the increase of t/r ratio, the Driving Torque speedup of external rotor electric machine 100 is large compared with the speedup of iron loss.Thus, the ratio of m/r is in this interval, and namely 1.75≤t/r≤2.4, are conducive to the Driving Torque improving external rotor electric machine 100, reduce the iron loss of external rotor electric machine 100 simultaneously.Because stator slot 14 needs certain space stator winding 12, therefore the width of stator tooth 13 can not be excessive.Comprehensive above-mentioned reason, the interval that t/r is comparatively suitable should be 1.75≤t/r≤2.4.
Due to the part that these two ratios of m/r and t/r are all composition external rotor electric machine 100 magnetic circuits, therefore for improving the Driving Torque of external rotor electric machine 100 and reducing iron loss, need to consider these two ratios of m/r and t/r.To sum up, m/r, t/r meet respectively: 1.7≤m/r≤2.3,1.75≤t/r≤2.4, thus, can improve the Driving Torque of external rotor electric machine 100 and reduce the iron loss of external rotor electric machine 100, thus improving the efficiency of external rotor electric machine 100.
Thus, according to the external rotor electric machine 100 for rotary compressor of the utility model embodiment, by by m/r, t/r is set to respectively: 1.7≤m/r≤2.3, 1.75≤t/r≤2.4, external rotor electric machine 100 Driving Torque can be improved and reduce iron loss, thus the electric efficiency of external rotor electric machine 100 can be increased, simultaneously the magnetic circuit of stator 10 of external rotor electric machine 100 and the close degree of saturation of magnetic of the magnetic circuit of rotor 20 moderate, also ensure that the stator slot 14 of stator 10 has enough large space and can hold stator winding 12, thus the structure of external rotor electric machine 100 is more reasonable.
Alternatively, the process of pole can be cut to the circumferential two ends of rotor magnet part 22, namely make the structure at the circumferential two ends of rotor magnet part 22 rounder and more smooth, thus the anti-demagnetization capability of external rotor electric machine 100 can be strengthened and optimize the sine degree of air-gap field waveform.
In an embodiment of the present utility model, t/r meets further: 1.8≤t/r≤2.4.Thus, the Driving Torque of external rotor electric machine 100 can be improved further, and reduce the iron loss of external rotor electric machine 100 further.
In an embodiment of the present utility model, rotor core 21 has be spaced apart from each other in the circumference of rotor core 21 multiple protruding 24, and limit mounting groove 23 between two often adjacent projections 24, rotor magnet part 22 is located in mounting groove 23.Particularly, rotor core 21 comprises rotor yoke 25 and protruding 24, and projection 24 is from inner peripheral surface the extending radially inwardly along rotor yoke 25 of rotor yoke 25, and rotor magnet part 22 can be located in mounting groove 23.Thus, the structure of rotor core 21 is simple, and multiple rotor magnet part 22 can be located in corresponding mounting groove 23, and rotor magnet part 22 is simple, easy to assembly with the assembly structure of rotor core 21.
Alternatively, multiple protruding 24 is one-body molded with rotor core 21.Thus, integrated rotor core 21 has higher structural stability, and rotor core 21 convenient formation, can manufacturing cost be reduced.
In an embodiment of the present utility model, each rotor magnet part does not divide 22 bonding or be riveted in corresponding mounting groove 23.Wherein, rotor magnet part 22 can be surface-mount type permanent magnet, and particularly, rotor magnet part 22 can be stuck in the inner surface of rotor core 21 by jump ring, or rotor magnet part 22 is pasted onto the inner surface of rotor core 21 by seccotine.Certainly, rotor magnet part 22 can be built-in permanent magnet, and particularly, rotor magnet part 22 can be fixed by end plate or the mode of rivet interlacement is fixed on rotor core 21.
In an embodiment of the present utility model, Ns=9, Nr=6.Particularly, stator 10 groove number is 9, and rotor number of poles is 6.
In an embodiment of the present utility model, stator core 11 forms by multiple stator punching is stacked.Particularly, stator core 11 can be overrided to form by multi-disc electromagnetic steel plate.
Alternatively, rotor core 21 can be overrided to form by electromagnetic steel plate, and steel overall processing that also can be higher by common magnetic permeability forms.
In an embodiment of the present utility model, stator winding 12 is centralized winding.Particularly, at the opening part of stator slot 14 device that to be flown in circles by use, concentrated rolling winding can be around on stator tooth 13.
According to the rotary compressor (scheming not shown) of the utility model embodiment, comprise the external rotor electric machine 100 for rotary compressor described according to above-described embodiment.Particularly, stator core 11 is fixed on the support of rotary compressor, and the rotor 20 of external rotor electric machine 100 is arranged with the spaced apart from inner walls of the shell of rotary compressor.Thus, external rotor electric machine 100 does not directly contact with the shell of compressor, thus can reduce compressor noise, and external rotor electric machine 100 is compressed structure, is conducive to the reduction of bearing height and the raising of rigidity thereof.Simultaneously, because the external rotor electric machine 100 for rotary compressor according to the utility model above-described embodiment has above-mentioned technique effect, therefore according to the rotary compressor of the utility model embodiment, also there is correspondingly technique effect, that is: the Driving Torque of rotary compressor is comparatively large, iron loss is less, efficiency is high, and rotary compressor is rational in infrastructure.
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 (8)
1. for an external rotor electric machine for rotary compressor, it is characterized in that, comprising:
Stator, described stator comprises stator core and stator winding, described stator core has the multiple stator tooth be spaced apart from each other in the circumference of described stator core, limit stator slot between two often adjacent described stator tooths, described stator winding is wrapped on described stator core through described multiple stator slot; With
Rotor, described rotor is located at outside described stator, described rotor comprises rotor core and multiple rotor magnet part, described multiple rotor magnet part is located on the internal face of described rotor core, each described rotor magnet part is ferrite permanent-magnet ironware, and number of stator slots is Ns, and rotor number of poles is Nr, described Ns/Nr meets: Ns/Nr=3/2
Wherein, the distance between the outer peripheral face of described rotor magnet part and the periphery wall of described rotor core is r, and the thickness of each described rotor magnet part is m, and the width of each described stator tooth is t, and described m/r, t/r meet respectively:
1.7≤m/r≤2.3，1.75≤t/r≤2.4。
2. the external rotor electric machine for rotary compressor according to claim 1, is characterized in that, described t/r meets further: 1.8≤t/r≤2.4.
3. the external rotor electric machine for rotary compressor according to claim 1 and 2, it is characterized in that, described rotor core has the multiple projection be spaced apart from each other in the circumference of described rotor core, limit mounting groove between two often adjacent described projections, described rotor magnet part is located in described mounting groove.
4. the external rotor electric machine for rotary compressor according to claim 3, is characterized in that, described multiple projection and described rotor core one-body molded.
5. the external rotor electric machine for rotary compressor according to claim 3, is characterized in that, each described rotor magnet part is bonding or be riveted in corresponding described mounting groove respectively.
6. the external rotor electric machine for rotary compressor according to claim 1, is characterized in that, described stator core forms by multiple stator punching is stacked.
7. the external rotor electric machine for rotary compressor according to claim 1, is characterized in that, described stator winding is centralized winding.
8. a rotary compressor, is characterized in that, comprises the external rotor electric machine for rotary compressor according to any one of claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420519429.7U CN204145242U (en) | 2014-09-10 | 2014-09-10 | Rotary compressor and external rotor electric machine thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420519429.7U CN204145242U (en) | 2014-09-10 | 2014-09-10 | Rotary compressor and external rotor electric machine thereof |
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| CN204145242U true CN204145242U (en) | 2015-02-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110739786A (en) * | 2018-07-20 | 2020-01-31 | 中车株洲电力机车研究所有限公司 | hub motor rotor structure |
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2014
- 2014-09-10 CN CN201420519429.7U patent/CN204145242U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110739786A (en) * | 2018-07-20 | 2020-01-31 | 中车株洲电力机车研究所有限公司 | hub motor rotor structure |
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