CN205544648U - For compressor motor with its compressor has - Google Patents

Abstract

The utility model discloses a for compressor motor with its compressor has, the rated torque of motor is tn, and rated revolution is n, tn <= 4.5N. M, n <= 150rpm, the motor includes: stator core, stator core have the spaced apart stator tooth of arranging of its circumference of a plurality of edges, inject the stator slot between two adjacent stator tooths, and wherein, stator core's axial length is L1, and stator core's external diameter is D1, L1 <= 50mm, and L1D1 <= 0.6, rotor core, the rotor core cover is established in stator core just rotatablely for stator core, and rotor core has the spaced apart magnet groove of arranging of its circumference of a plurality of edges, and every magnet groove is equipped with the magnetic part respectively along axial extension and every magnet inslot of rotor core, and every magnetic part satisfies the relational expression at the remanence br under 20 DEG C: br > 1.35T. According to the utility model discloses a motor for the compressor, simple structure, the brow leakage is few, and material utilization rate is high, the sexual valence relative altitude.

Description

Electric moto used in compressor and the compressor with it

Technical field

This utility model relates to Compressor Technology field, more particularly, to a kind of electric moto used in compressor and have it Compressor.

Background technology

In current field of household appliances, electric efficiency has accomplished the level that comparison is high, has i.e. reached copper loss and ferrum in design Damage the stage of balance；And use in the means of further raising efficiency, in correlation technique, generally by stator core, rotor ferrum The most isometric configuration of length vertically of magnetic part in the Magnet groove of core and rotor core, fully making by material With, lifting motor efficiency.On the premise of output is certain, for the consideration of cost performance, it will usually use long-pending thickness relatively dwarf forms Electric machine structure, yet with the saturation effect of magnetic circuit, the motor of said structure can cause the axial two ends of stator and rotor to leak The phenomenon of magnetic, causes the utilization rate of ferromagnetic material to decline, wastes electromagnetic material simultaneously, and cost performance is relatively low.

Utility model content

One of technical problem that this utility model is intended to solve in correlation technique the most to a certain extent.To this end, this reality By novel proposition one electric moto used in compressor, the simple in construction of this electric moto used in compressor, stock utilization is high, and cost performance is high.

This utility model also proposes a kind of compressor with above-mentioned compressor motor.

According to the electric moto used in compressor of this utility model first aspect, the nominal torque of described motor is Tn, rated speed For n, Tn≤4.5N.m, n≤150rpm, described motor includes: stator core, and described stator core has multiple along between its circumference Stator tooth arranged apart, limits stator slot between adjacent two described stator tooths, wherein, and the axial length of described stator core Degree is L1, and the external diameter of described stator core is D1, L1≤50mm, L1/D1≤0.6；Rotor core, described rotor core is set in Described stator core is interior and rotatable relative to described stator core, and described rotor core has multiple along its circumferentially spaced cloth The Magnet groove put, each described Magnet groove is respectively equipped with magnetic along the axially extending of described rotor core and each described Magnet groove Property part, each described magnetic part remanent magnetism Br at 20 DEG C meets relational expression: Br ＞ 1.35T.

According to electric moto used in compressor of the present utility model, by using the magnetic part that remanent magnetism is higher so that remaining of magnetic part Magnetic improves, thus adds the magnetic induction and total magnetic flux provided in stator core, is requiring to export the feelings of same torque Under condition, the electric current that stator needs is declined, thus reduces copper loss.Furthermore, the size of the stator core of motor is closed Reason design so that the axial length of this motor reduces, thus reduces the iron loss of motor, improves motor cost performance further.Should The simple in construction of motor, brow leakage is few, and stock utilization is high, and cost performance is high.

It addition, according to electric moto used in compressor of the present utility model, it is also possible to have a following additional technical characteristic:

According to an embodiment of the present utility model, each described magnetic part remanent magnetism Br at 20 DEG C is 1.38T.

According to an embodiment of the present utility model, the axial length of described rotor core is L2, and described magnetic part is in institute State a length of L3 in the axial direction of rotor core, 0.8≤L3/L2≤0.94.

According to an embodiment of the present utility model, described magnetic part is rare-earth Nd-Fe-B Magnet.

According to an embodiment of the present utility model, the cross sectional shape of each described Magnet groove forms in-line, V-arrangement, U-shaped Or W shape.

According to an embodiment of the present utility model, also include that two rotor end plates, two described rotor end plates set respectively It is connected at the two ends of described rotor core and with described rotor core.

According to an embodiment of the present utility model, set respectively between two described rotor end plates and each described magnetic part There are non-magnetic piece or non-magnetic shell fragment.

According to an embodiment of the present utility model, described rotor end plates is non-magnet material part.

According to the compressor of this utility model second aspect, including according to the electric moto used in compressor described in above-described embodiment.

Additional aspect of the present utility model and advantage will part be given in the following description, and part will be from explained below In become obvious, or recognized by practice of the present utility model.

Accompanying drawing explanation

Fig. 1 is the structural representation of the electric moto used in compressor according to this utility model embodiment；

Fig. 2 is the rotor core installation diagram with magnetic part of the electric moto used in compressor according to this utility model embodiment；

Fig. 3 is the sectional view of the structure shown in Fig. 2；

Fig. 4 is that the efficiency of the electric moto used in compressor according to this utility model embodiment is with the axial length of magnetic part and rotor The curve chart that the ratio (L3/L2) of the axial length of iron core changes.

Reference:

100: motor；

11: stator core；111: stator slot；112: stator tooth；113: through hole；

12: rotor core；121: Magnet groove；122: magnetic part.

Detailed description of the invention

Of the present utility model embodiment is described below in detail, and the example of described embodiment is shown in the drawings.Below by The embodiment being described with reference to the drawings is exemplary, it is intended to be used for explaining this utility model, and it is not intended that new to this practicality The restriction of type.

1 to Fig. 4 specifically describes the electric moto used in compressor according to this utility model first aspect embodiment below in conjunction with the accompanying drawings 100。

Electric moto used in compressor 100 according to this utility model embodiment, the nominal torque of motor 100 is Tn, rated speed For n, Tn≤4.5N.m, n≤150rpm, motor 100 includes stator core 11 and rotor core 12.

Specifically, stator core 11 has multiple stator tooth 112 along its circumferentially spaced layout, adjacent two stators Limiting stator slot 111 between tooth 112, wherein, the axial length of stator core 11 is L1, and the external diameter of stator core 11 is D1, L1≤50mm, L1/D1≤0.6.It is interior and rotatable relative to stator core 11 that rotor core 12 is set in stator core 11, rotor Iron core 12 has multiple Magnet groove 121 along its circumferentially spaced layout, each Magnet groove 121 axially prolonging along rotor core 12 Stretching and be respectively equipped with in each Magnet groove 121 magnetic part 122, each magnetic part 122 remanent magnetism Br at 20 DEG C meets relational expression: Br ＞ 1.35T.Alternatively, rotor core 12 is formed by multiple rotor iron plates are stacked, and stator core 11 is folded by multiple stator iron plates Put and form.

As depicted in figs. 1 and 2, in the present embodiment, stator core 11 and rotor core 12 are the most vertically (such as figure Above-below direction shown in 2) extend, wherein, stator core 11 includes ring-type yoke and multiple stator tooth 112, and yoke is generally Circular, define in stator core 11 along its axially extended through hole 113, stator core 11 has the circumference along through hole 113 Stator tooth 112 arranged spaced apart, the most multiple stator tooths 112 are spaced on the internal perisporium being located at yoke of turning up the soil, adjacent two Limit between stator tooth 112 and the stator slot 111 of through hole 113 conducting, stator tooth 112 is arranged with stator winding and (does not shows Go out), stator winding is wrapped on stator core 11 through multiple stator slots 111.Wherein, stator winding can be to be generally known as Three windings of U, V, W phase.

Preferably, multiple stator tooths 112 are arranged on the circumferencial direction of yoke equally spacedly.Wherein, each stator tooth 112 Can be formed by a part for the internal perisporium of yoke is inwardly projecting.Here, it should be noted that direction " interior " refers to towards magnetic The direction at yoke center, its rightabout is defined as " outward ", i.e. away from the direction at yoke center.

Further, rotor core 12 has multiple Magnet groove 121 along its circumferentially spaced layout, each Magnet groove 121 axially extending along rotor core 12 respectively, and, it is provided with the length direction along Magnet groove 121 in each Magnet groove 121 and prolongs The magnetic part 122 stretched.In the present embodiment, rotor core 12 is rotatably arranged in the through hole 113 of stator core 11, and turns Gap is limited between lateral wall and the medial wall of stator core 11 of sub-iron core 12.Preferably, rotor separates with N pole with S pole The magnetic part 122 of multiple number of magnetic poles is maintained at the week of rotor core 12 by the mode in a circumferential direction that is equally spaced alternately arranged Upwards.Each magnetic part 122 remanent magnetism Br at 20 DEG C meets relational expression: Br ＞ 1.35T.

Thus, according to the electric moto used in compressor 100 of this utility model embodiment, by using the magnetic part that remanent magnetism is higher 122 so that the remanent magnetism of magnetic part 122 improves, thus the magnetic induction and total magnetic flux provided in stator core 11 is provided, In the case of requiring to export same torque, the electric current that stator needs is declined, thus reduces copper loss.Furthermore, to motor The size of the stator core 11 of 100 carries out appropriate design so that the axial length of this motor 100 reduces, thus reduces motor 100 Iron loss, improve motor 100 cost performance further.The simple in construction of this motor 100, brow leakage is few, and stock utilization is high, Cost performance is high.

Preferably, according to an embodiment of the present utility model, each magnetic part 122 remanent magnetism Br at 20 DEG C is 1.38T.Because the remanent magnetism of magnetic part 122 improves so that provide the magnetic induction in stator core 11 and total magnetic flux all phases Should increase, the counter electromotive force sensed in the stator windings also can promote accordingly, and equally, the torque of stator current output increases, In the case of requiring to export same torque, the electric current that stator needs just can decline, stator current the copper loss produced also declines ?.Simultaneously in the case of total specified output does not increases, due to the decline of copper loss, and due to the increase of magnetic flux, iron loss also in The trend now increased, now can ensure the performance of motor 100 by reducing the axial length of the stator core 11 of motor 100 And cost performance, improve Magnet and the utilization rate of silicon steel material.

As it is shown on figure 3, according to an embodiment of the present utility model, the axial length of rotor core 12 is L2, magnetic part The 122 a length of L3 in the axial direction of rotor core 12,0.8≤L3/L2≤0.94.It is to say, magnetic part 122 is located at rotor In the Magnet groove 121 of iron core 12, and the axial length L 3 of magnetic part 122 is less than the axial length L 2 of rotor core 12.

Wherein, Fig. 4 is the axle of the efficiency of electric moto used in compressor 100 axial length with magnetic part 122 and rotor core 12 The curve chart changed to the ratio (L3/L2) of length, the efficiency of motor 100 reduces, in first increasing afterwards along with the increase of L3/L2 After the trend that tends towards stability.Therefore, the axial length L 3 of magnetic part 122 could be arranged to the axial length L 2 of rotor core 12 0.8 times, 0.9 times or 0.94 times etc..Thus, by the axial length of rotor core 12 with magnetic part 122 is carried out reasonable Join, the brow leakage of motor 100 can be significantly improved, improve material and the silicon of rotor core 12 of magnetic part 122 The utilization rate of Steel material, thus improve efficiency and the cost performance of motor 100.

In detailed description of the invention more of the present utility model, magnetic part 122 is rare-earth Nd-Fe-B Magnet.Such as, rare earth Ndfeb magnet can use sintering process to make, and at 20 DEG C, the magnetic property of this magnetic part 122 is: remanent magnetism Br is more than 1.35T, HCJ Hcj is more than 1700kA/m.Thus, by using the magnetic part 122 that remanent magnetism is higher, electricity can be improved greatly Machine 100 brow leakage, improves the utilization rate of ferromagnetic material, and advantageously reduces copper loss, thus improve motor 100 further Cost performance.

Alternatively, according to an embodiment of the present utility model, the cross sectional shape of each Magnet groove 121 forms in-line, V Shape, U-shaped or W shape.With reference to Fig. 1 and Fig. 2, in the present embodiment, there is in rotor core 12 six Magnet grooves 121, each Magnet The cross sectional shape of groove 121 is respectively formed in-line.Wherein, the concrete shape of Magnet groove 121 specifically can be arranged according to actual requirement, This is not especially limited by this utility model.

Advantageously, electric moto used in compressor 100 also includes that two rotor end plates (not shown), two rotor end plates are respectively provided at The two ends of rotor core 12 and being connected with rotor core 12.In other words, this electric moto used in compressor 100 mainly by stator core 11, Stator winding, rotor core 12, multiple magnetic part 122 and two rotor end plates compositions.Wherein, two rotor end plates are respectively provided at The two ends up and down of rotor core 12, and two rotor cores 12 can be fixed on rotor core 12 by fixture, it is ensured that Motor 100 is operationally, multiple magnetic part 122 is all the time in Magnet groove 121, thus ensures the properly functioning of this motor 100.

Alternatively, according to an embodiment of the present utility model, between two rotor end plates and each magnetic part 122 respectively It is provided with non-magnetic piece or non-magnetic shell fragment (not shown).Specifically, each magnetic part 122 is located at the Magnet groove of rotor core 12 In 121, and, the two ends of magnetic part 122 end surfaces with rotor core 12 respectively opens layout, further, and Magnet groove 121 The position at the two ends being inside positioned at magnetic part 122 is respectively equipped with non-magnetic piece or non-magnetic shell fragment, thus plays fixed magnetic part The effect of 122.Certainly, the structure for fixed magnetic part 122 of the present utility model is not limited to this.

It addition, according to an embodiment of the present utility model, rotor end plates is non-magnet material part.Two rotor end plates can To be fixed on the two ends of rotor core 12 respectively by rivet, this rotor end plates both can be to the magnetic part 122 in Magnet groove 121 It is fixed, does not the most affect the Distribution of Magnetic Field of motor 100, it is ensured that the normal work of motor 100.

Illustrate below for specific embodiment.In the present embodiment, nominal torque Tn of motor 100≤ 4.5N.m, rated speed n≤150rpm；Use high trade mark Magnet in conjunction with rotor, can try to achieve according to motor 100 theory, optimality Motor 100 physical dimension that energy is corresponding, the axial length L 1≤50mm of i.e. corresponding stator core 11, and L1/D1≤0.6.

Rotor uses the magnetic part 122 that remanent magnetism Br at 20 DEG C is 1.38T, and HCJ Hcj is 1700kA/m.Cause Remanent magnetism for this magnetic part 122 is improved so that can be provided to the magnetic induction in stator core 11 and total magnetic flux all Correspondingly increasing, the counter electromotive force sensed in the stator windings also can promote accordingly, and equally, the torque of stator current output increases Adding, in the case of requiring to export same torque, the electric current that stator needs just can decline, stator current the copper loss produced is also Be have dropped.Simultaneously in the case of total specified output does not increases, due to the decline of copper loss, and due to the increase of magnetic flux, Iron loss also presents the trend of increase, now can ensure motor by reducing the axial length of the stator core 11 of motor 100 Performance and cost performance, improve magnetic part 122 and the utilization rate of silicon steel material.

Specifically, there is proportional relation due to iron loss Wfe with magnetic induction density B and rotating speed f.So, at identical rotating speed f In the case of, iron loss Wfe changes in the case of the value of magnetic induction density B changes.When the magnetic used in rotor The remanent magnetism of part 122 improves, then the magnetic induction density B produced in stator core 11 can become big, causes iron loss Wfe to become big, Unfavorable to improved efficiency.While increasing due to magnetic flux, output keeps constant, increases excessive, by motor for suppression iron loss The axial length of the stator core 11 of 100 retrains, it is ensured that the performance of motor 100 and cost performance.

Further, for reducing brow leakage, promoting the utilization rate of Magnet, constraint magnetic part 122 is axial long further Spend short compared with the axial length of rotor core 12.When considering that cost performance maximizes, preferably ratio 0.8≤L3/L2≤0.94, Fig. 3 shows when L3/L2 changes within the specific limits, and the efficiency curve diagram of motor 100, in certain specified output condition Under, this confinement dimension can ensure the performance of motor 100 effectively, promotes stock utilization, has certain to demagnetization simultaneously Castering action.

In the present embodiment, rotor core 12 is positioned at the inner side of stator core 11, and rotor core 12 is formed for holding Receiving multiple Magnet grooves 121 of multiple magnetic part 122, multiple Magnet grooves 121 are along the circumferentially spaced distribution of rotor core 12 and many The periphery wall of individual Magnet groove 121 adjacent rotor iron core 12 is arranged.Rotor core 12 is with multiple stator tooths 112 and multiple magnetic parts 122 separate the relative mode in the space of regulation is arranged in the inner circumferential side of stator.Certainly, the structure of motor 100 of the present utility model Being not limited to this, rotor core 12 can also be positioned at the outside (not shown) of stator core 11, repeats no more here.

According to the compressor of this utility model second aspect embodiment, including the electric moto used in compressor according to above-described embodiment 100.Wherein, the type of compressor can adaptive change according to the actual requirements, this is not particularly limited by this utility model. Owing to the electric moto used in compressor 100 according to this utility model embodiment has above-mentioned technique effect, therefore, implement according to the application The compressor of example also has the simple in construction of above-mentioned technique effect, i.e. this compressor, and stock utilization is high, and cost performance is high.

Other of compressor according to this utility model embodiment constitute and operate for those of ordinary skill in the art For be all known, be not detailed herein.

In description of the present utility model, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width Degree ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward ", " suitable Hour hands ", " counterclockwise ", " axially ", " radially ", the orientation of the instruction such as " circumferential " or position relationship be based on orientation shown in the drawings Or position relationship, be for only for ease of describe this utility model and simplify describe rather than instruction or hint indication device or Element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to limit of the present utility model System.

Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or Implicitly include at least one this feature.In description of the present utility model, " multiple " are meant that at least two, such as two Individual, three etc., unless otherwise expressly limited specifically.

In this utility model, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " Gu Fixed " etc. term should be interpreted broadly, connect for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be Be mechanically connected, it is also possible to be electrical connection or each other can communication；Can be to be joined directly together, it is also possible to by the indirect phase of intermediary Even, can be connection or the interaction relationship of two elements of two element internals, unless otherwise clear and definite restriction.For this For the those of ordinary skill in field, above-mentioned term concrete meaning in this utility model can be understood as the case may be.

In this 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 mediate contact.And, first is special Levy second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " permissible Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature.

In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy Point is contained at least one embodiment of the present utility model or example.In this manual, the schematic table to above-mentioned term State and be necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature are permissible One or more embodiment in office or example combine in an appropriate manner.Additionally, in the case of the most conflicting, this area Technical staff the feature of the different embodiments described in this specification or example and different embodiment or example can be entered Row combines and combination.

Although above it has been shown and described that embodiment of the present utility model, it is to be understood that above-described embodiment is Exemplary, it is impossible to it is interpreted as that those of ordinary skill in the art is in scope of the present utility model to restriction of the present utility model In above-described embodiment can be changed, revise, replace and modification.

Claims (9)

1. an electric moto used in compressor, the nominal torque of described motor is Tn, and rated speed is n, Tn≤4.5N.m, n≤ 150rpm, it is characterised in that including:

Stator core, described stator core has multiple stator tooth along its circumferentially spaced layout, adjacent two described stators Limiting stator slot between tooth, wherein, the axial length of described stator core is L1, and the external diameter of described stator core is D1, L1 ≤ 50mm, L1/D1≤0.6；

Rotor core, it is interior and rotatable relative to described stator core that described rotor core is set in described stator core, described Rotor core has multiple Magnet groove along its circumferentially spaced layout, axial along described rotor core of each described Magnet groove Extending and be respectively equipped with magnetic part in each described Magnet groove, each described magnetic part remanent magnetism Br at 20 DEG C meets relation Formula: Br ＞ 1.35T.

Electric moto used in compressor the most according to claim 1, it is characterised in that each described magnetic part remanent magnetism at 20 DEG C Br is 1.38T.

Electric moto used in compressor the most according to claim 1, it is characterised in that the axial length of described rotor core is L2, The described magnetic part a length of L3 in the axial direction of described rotor core, 0.8≤L3/L2≤0.94.

4. according to the electric moto used in compressor according to any one of claim 1-3, it is characterised in that described magnetic part is rare earth neodymium Ferrum boron magnets.

Electric moto used in compressor the most according to claim 1, it is characterised in that the cross sectional shape of each described Magnet groove is formed In-line, V-arrangement, U-shaped or W shape.

Electric moto used in compressor the most according to claim 1, it is characterised in that also include two rotor end plates, described in two Rotor end plates is respectively provided at the two ends of described rotor core and is connected with described rotor core.

Electric moto used in compressor the most according to claim 6, it is characterised in that two described rotor end plates and each described magnetic It is respectively equipped with non-magnetic piece or non-magnetic shell fragment between property part.

Electric moto used in compressor the most according to claim 6, it is characterised in that described rotor end plates is non-magnet material part.

9. a compressor, it is characterised in that include according to the electric moto used in compressor according to any one of claim 1-8.