CN204794427U - Abversion minor motor and compressor that has it - Google Patents
Abversion minor motor and compressor that has it Download PDFInfo
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- CN204794427U CN204794427U CN201520495264.9U CN201520495264U CN204794427U CN 204794427 U CN204794427 U CN 204794427U CN 201520495264 U CN201520495264 U CN 201520495264U CN 204794427 U CN204794427 U CN 204794427U
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- stator core
- permanent magnet
- electric machine
- described stator
- external rotor
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Abstract
The utility model discloses an abversion minor motor and compressor that has it, abversion minor motor includes: stator core, the rotor, the rotor is rotationally established stator core's periphery, the permanent magnet, the permanent magnet is established just be located on the rotor the rotor with between the stator core, stator core's axial length is less than the axial length of permanent magnet just stator core lies in in its ascending projection the permanent magnet is in in stator core's the ascending projection of axle. According to the utility model discloses a tip of abversion minor motor gathers the magnetic effect reinforcing, and the brow leakage of permanent magnet improves, and the electric efficiency promotes.
Description
Technical field
The utility model relates to Compressor Technology field, more specifically, relates to a kind of external rotor electric machine and has its compressor.
Background technology
External rotor electric machine can be applied in hermetically encapsulated coolant compressor, such as, be contained in domestic refrigerator or air-conditioning system.Because refrigerant compressor must possess little component height, so that can reach minimum to utilizing may limiting of refrigeration space.In such an embodiment, external rotor electric machine is used to possess advantage as drive motors.Because external rotor electric machine has less component height compared with the drive motors of built-in rotor, possesses again the same performance simultaneously.
In the related, for saving the material cost of motor, the axial length of permanent magnet is designed to the axial length approximating stator.The brow leakage that the two ends of the permanent magnet of the motor of this structure produce is comparatively serious, is unfavorable for the lifting of electric efficiency.
Utility model content
The utility model is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, the utility model proposes a kind of external rotor electric machine, described external rotor electric machine leakage field problem improves, and electric efficiency promotes.
The utility model also proposed a kind of compressor with above-mentioned external rotor electric machine.
According to the external rotor electric machine of the utility model first aspect, comprising: stator core; Rotor, described rotor is located at the periphery of described stator core rotationally; Permanent magnet, described permanent magnet is located on described rotor and between described rotor and described stator core, the axial length of described stator core is less than the axial length of described permanent magnet and the projection in its axial direction of described stator core is positioned at the projection axially of described permanent magnet at described stator core.
Gather magnetic effect according to the end of external rotor electric machine of the present utility model to strengthen, the brow leakage of permanent magnet improves, and electric efficiency promotes.
In addition, following additional technical characteristic can also be had according to external rotor electric machine of the present utility model:
According to an embodiment of the present utility model, at described stator core axially, the two ends of described permanent magnet are respectively to the two ends exceeding described stator core outward.
According to an embodiment of the present utility model, at described stator core axially, to exceed the distance at the two ends of described stator core equal at the two ends of described permanent magnet.
According to an embodiment of the present utility model, described stator core is made up of the stator punching of multiple axially superposition, at described stator core axially, the difference of the length of described permanent magnet and the length of described stator core is more than or equal to the thickness of a described stator punching.
According to an embodiment of the present utility model, described permanent magnet is ferrite, and described stator punching is electromagnetic steel plate.
According to an embodiment of the present utility model, the thickness of each described stator punching is respectively 0.2 millimeter-1.0 millimeters.
According to an embodiment of the present utility model, also comprise stator winding, described stator core is provided with winding slot, and described stator winding is located in described winding slot.
According to an embodiment of the present utility model, described permanent magnet is positioned at the projection axially of described stator winding at described stator core in the projection axially of described stator core.
According to an embodiment of the present utility model, the internal perisporium of described rotor is provided with magnet slot, and described permanent magnet is located in described magnet slot.
The external rotor electric machine according to the utility model first aspect is comprised according to the compressor of the utility model second aspect.
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
Fig. 1 is the axial cutaway view of the external rotor electric machine according to the utility model embodiment;
Fig. 2 is the radial cross-section of the external rotor electric machine according to the utility model embodiment.
Reference numeral:
External rotor electric machine 100;
Stator core 10; Winding slot 11; Installing hole 12;
Rotor 20; Axis hole 21;
Permanent magnet 30;
Stator winding 40.
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.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
The external rotor electric machine 100 according to the utility model embodiment is described in detail below in conjunction with accompanying drawing.
Shown in seeing figures.1.and.2, stator core 10, rotor 20 and permanent magnet 30 can be comprised according to the external rotor electric machine 100 of the utility model embodiment.
Rotor 20 is located at the periphery of stator core 10 rotationally.That is, rotor 20 is located at the outside of stator core 10, and rotor 20 can rotate relative to stator core 10.Preferably, certain interval is separated with between rotor 20 and stator core 10.Permanent magnet 30 to be located on rotor 20 and between rotor 20 and stator core 10.The axial length of stator core 10 is less than the axial length of permanent magnet 30, and stator core 10 can be positioned at the projection axially of permanent magnet 30 at stator core 10 in self projection axially.
Here, the axial length of stator core 10 is the axially extended size of stator core 10 along self, and the axial length of permanent magnet 30 is the axially extended size of permanent magnet 30 along stator core 10.Usually, the axis of stator core 10 is the axis of rotor 20, namely the axis of external rotor electric machine 100.In embodiment of the present utility model, axial, the axis of permanent magnet 30 of axial, the rotor 20 of stator core 10 and the axially all identical of motor.
According to the external rotor electric machine 100 of the utility model embodiment, by the axial length making the axial length of stator core 10 be less than permanent magnet 30, and make the axis projection of stator core 10 be positioned at the axis projection of permanent magnet 30, the brow leakage of permanent magnet 30 is improved, magnetic effect is gathered in the end enhancing motor, is beneficial to the lifting of electric efficiency.
Preferably, at stator core 10 axially, the two ends of permanent magnet 30 are respectively to the two ends exceeding stator core 10 outward.Here " outwards " refer at stator core 10 axially away from the direction of stator core 10.Specifically, as shown in Figure 1, when the axis of stator core 10 is vertical direction, the upper end of permanent magnet 30 upwards can exceed the upper end of stator core 10, and the lower end of permanent magnet 30 can exceed the lower end of stator core 10 downwards.When the axis of stator core 10 is horizontal direction, the left end of permanent magnet 30 can exceed the left end of stator core 10 left, and the right-hand member of permanent magnet 30 can exceed the right-hand member of stator core 10 to the right.
Thus, the brow leakage that the two ends that effectively can reduce permanent magnet 30 produce, magnetic effect is gathered in the end strengthening motor, when motor cost increases few, can improve motor performance.
In preferred implementations more of the present utility model, at stator core 10 axially, to exceed the distance at the two ends of stator core 10 equal at the two ends of permanent magnet 30.That is, at stator core 10 axially, to exceed the distance of one end of stator core 10 equal with the distance that the other end of permanent magnet 30 exceeds the other end of stator core 10 in one end of permanent magnet 30.
Such as, as shown in Figure 1, when the axis of stator core 10 is vertical direction, in the vertical direction, the distance that the upper end of permanent magnet 30 exceeds the upper end of stator core 10 is identical with the distance that the lower end of permanent magnet 30 exceeds the lower end of stator core 10.Thus, the brow leakage that the two ends of permanent magnet 30 produce can the reduction of equal extent, and the poly-magnetic effect at motor two ends can the enhancing of equal extent, and motor performance is good.
Stator core 10 is made up of the stator punching of multiple axially superposition.In other words, stator core 10 is made up of multiple stacked stator punching, and the axis of the stator core 10 of the stacked rear formation of multiple stator punching is identical with the axis of each stator punching.At stator core 10 axially, the difference of the length L1 of permanent magnet 30 and the length L2 of stator core 10 is more than or equal to the thickness of a stator punching.
In other words, permanent magnet 30 is at least the thickness of a stator punching along the axially extended length of stator core 10 and stator core 10 along the difference of the axially extended length of self.The thickness of stator punching is stator punching along self axially extended size.Thereby, it is possible to more effectively reduce the leakage field at motor two ends, magnetic effect is gathered in the end strengthening motor, improves the performance of motor.
Such as, in an embodiment of the present utility model, at stator core 10 axially, the difference of the length L1 of permanent magnet 30 and the length L2 of stator core 10 equals the thickness of seven stator punchings.Thus, magnetic effect is gathered in the end that effectively can strengthen motor.Alternatively, the thickness of each stator punching can be chosen respectively between 0.2 millimeter-1.0 millimeters.Thus, the core loss that stator core 10 produces can be reduced well.
Such as, in a test example of inventor, the thickness of stator punching is 0.35mm, the length L1 of permanent magnet 30 is 22mm, the length L2 of stator core 10 is 17mm, at stator core 10 axially, the difference of the length L1 of permanent magnet 30 and the length L2 of stator core 10 approximates the thickness of 14 stator punchings.Compare with the structure that the length L2 of stator core 10 is 17mm with the length L1 of permanent magnet 30, the Driving Torque of the external rotor electric machine 100 of the utility model embodiment is than exceeding 20% in correlation technique, and motor performance significantly promotes.
Alternatively, permanent magnet 30 can be ferrite, and stator punching can be electromagnetic steel plate.Ferrite relative inexpensiveness, increase cost that can not be too much, simultaneously again can the performance of effective lifting motor.
Shown in seeing figures.1.and.2, the external rotor electric machine 100 according to the utility model embodiment can also comprise stator winding 40, and stator core 10 is provided with winding slot 11, and stator winding 40 can be located in winding slot 11.Wherein, stator winding 40 can all be located in winding slot 11, also can partly be located in winding slot 11.
Further, permanent magnet 30 can be positioned at the projection axially of stator winding 40 at stator core 10 in the projection axially of stator core 10.That is, at stator core 10 axially, the length that permanent magnet 30 extends can be less than or equal to the length that stator winding 40 extends.
As shown in Figure 1, a part for stator winding 40 can be stretched out in winding slot 11, at stator core 10 axially, the length that permanent magnet 30 extends is less than the length that stator winding 40 extends, and the two ends of stator winding 40 extend beyond the two ends of permanent magnet 30 respectively.
The internal perisporium of rotor 20 can be provided with magnet slot, and permanent magnet 30 is located in magnet slot, and the lower end of permanent magnet 30 is supported on the wall of magnet slot, as shown in Figure 1.Thus, permanent magnet 30 is convenient to assembling and is assembled firmly.The bottom of rotor 20 can arrange axis hole 21, so that be connected with the rotating shaft of compressor, drives compressor operating.Stator core 10 can arrange installing hole 12, so that fixed on the compressor by stator core 10.
In sum, external rotor electric machine 100 according to the utility model embodiment comprises stators and rotators 20, the stator winding 40 that stator comprises the stator core 10 for playing magnetic circuit effect and is located on stator core 10, rotor 20 is provided with permanent magnet 30, and stator core 10 is superposed by polylith electromagnetic steel plate and formed.Wherein, at stator core 10 or rotor 20 axially, the length of stator core 10 is less than the length of permanent magnet 30 and the two ends of stator core 10 do not exceed the two ends of permanent magnet 30.Preferably, the difference of the length of permanent magnet 30 and the length of stator core 10 is at least the thickness of an electromagnetic steel plate.
Thus, effectively can reduce the leakage field at permanent magnet 30 two ends, magnetic effect is gathered in the end strengthening motor, is conducive to the raising of motor performance.External rotor electric machine 100 volume of this kind of structure is little, cost is low and function admirable.
The external rotor electric machine 100 of basic utility model embodiment is comprised according to the compressor of the utility model embodiment.Owing to there is above-mentioned useful technique effect according to the external rotor electric machine 100 of the utility model embodiment, therefore can promote according to the performance of the compressor of the utility model embodiment.Wherein, external-rotor-type electricity can use as the drive motors of compressor.Compressor other form and be known for the person of ordinary skill of the art with the annexation of external rotor electric machine 100, be not described in detail at this.
In description of the present utility model, it will be appreciated that, term " length ", " thickness ", " on ", D score, " front ", " afterwards ", " 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, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.
In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; 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 or the interaction relationship of two elements.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example " 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, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment, revises, replace and modification in scope of the present utility model.
Claims (10)
1. an external rotor electric machine, is characterized in that, comprising:
Stator core;
Rotor, described rotor is located at the periphery of described stator core rotationally;
Permanent magnet, described permanent magnet is located on described rotor and between described rotor and described stator core, the axial length of described stator core is less than the axial length of described permanent magnet and the projection in its axial direction of described stator core is positioned at the projection axially of described permanent magnet at described stator core.
2. external rotor electric machine according to claim 1, is characterized in that, at described stator core axially, the two ends of described permanent magnet are respectively to the two ends exceeding described stator core outward.
3. external rotor electric machine according to claim 2, is characterized in that, at described stator core axially, the distance that the two ends of described permanent magnet exceed the two ends of described stator core is equal.
4. external rotor electric machine according to claim 1, it is characterized in that, described stator core is made up of the stator punching of multiple axially superposition, at described stator core axially, the difference of the length of described permanent magnet and the length of described stator core is more than or equal to the thickness of a described stator punching.
5. external rotor electric machine according to claim 4, is characterized in that, described permanent magnet is ferrite, and described stator punching is electromagnetic steel plate.
6. external rotor electric machine according to claim 4, is characterized in that, the thickness of each described stator punching is respectively 0.2 millimeter-1.0 millimeters.
7. external rotor electric machine according to claim 1, is characterized in that, also comprises stator winding, and described stator core is provided with winding slot, and described stator winding is located in described winding slot.
8. external rotor electric machine according to claim 7, is characterized in that, described permanent magnet is positioned at the projection axially of described stator winding at described stator core in the projection axially of described stator core.
9. external rotor electric machine according to claim 1, is characterized in that, the internal perisporium of described rotor is provided with magnet slot, and described permanent magnet is located in described magnet slot.
10. a compressor, is characterized in that, comprises the external rotor electric machine according to any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520495264.9U CN204794427U (en) | 2015-07-09 | 2015-07-09 | Abversion minor motor and compressor that has it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520495264.9U CN204794427U (en) | 2015-07-09 | 2015-07-09 | Abversion minor motor and compressor that has it |
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| Publication Number | Publication Date |
|---|---|
| CN204794427U true CN204794427U (en) | 2015-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520495264.9U Active CN204794427U (en) | 2015-07-09 | 2015-07-09 | Abversion minor motor and compressor that has it |
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| Country | Link |
|---|---|
| CN (1) | CN204794427U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108092426A (en) * | 2018-01-25 | 2018-05-29 | 博远机电（嘉兴）有限公司 | stator punching and stator core |
| CN108110914A (en) * | 2018-01-25 | 2018-06-01 | 博远机电（嘉兴）有限公司 | Stator core and motor |
| CN108712046A (en) * | 2018-06-05 | 2018-10-26 | 美的威灵电机技术（上海）有限公司 | Multiple air gap motor |
-
2015
- 2015-07-09 CN CN201520495264.9U patent/CN204794427U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108092426A (en) * | 2018-01-25 | 2018-05-29 | 博远机电（嘉兴）有限公司 | stator punching and stator core |
| CN108110914A (en) * | 2018-01-25 | 2018-06-01 | 博远机电（嘉兴）有限公司 | Stator core and motor |
| CN108110914B (en) * | 2018-01-25 | 2024-02-06 | 博远机电（嘉兴）有限公司 | Stator core and motor |
| CN108712046A (en) * | 2018-06-05 | 2018-10-26 | 美的威灵电机技术（上海）有限公司 | Multiple air gap motor |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |