CN112134376A

CN112134376A - Stator, motor, compressor, refrigeration plant and vehicle

Info

Publication number: CN112134376A
Application number: CN201910547027.5A
Authority: CN
Inventors: 郑军洪; 孙国伟; 陈汉锡
Original assignee: Guangdong Welling Auto Parts Co Ltd
Current assignee: Guangdong Welling Auto Parts Co Ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2020-12-25

Abstract

The invention provides a stator, a motor, a compressor, refrigeration equipment and a vehicle. Wherein, the stator includes: the stator core comprises a plurality of segmented cores, each segmented core comprises a yoke part and a tooth part positioned on the inner side of the yoke part, and any two adjacent segmented cores are enclosed to form a winding slot; the stator winding is wound on the tooth part and extends into the winding slot; the outer diameter D1 of the stator core and the inner diameter D2 of the stator core meet the requirement that D2/D1 are more than or equal to 0.53 and less than or equal to 0.65. The stator provided by the invention can maximally improve the using amount of the stator winding and the using amount of the magnet, so that the balance of the copper loss and the iron loss of the motor is achieved, the high power density of the motor is realized, and the motor has the advantages of small volume, light weight and high efficiency.

Description

Stator, motor, compressor, refrigeration plant and vehicle

Technical Field

The invention belongs to the technical field of motor equipment, and particularly relates to a stator, a motor, a compressor, a refrigeration device and a vehicle.

Background

The permanent magnet synchronous motor has the characteristics of high efficiency and high power density, and is widely applied to electric compressor motors for new energy automobiles. The efficiency of the motor has direct influence on the endurance mileage of the electric automobile, and the power density of the motor plays a very key role in realizing the lightweight of the automobile. In this background, the pursuit of high efficiency, high power density electrical machines is an important goal of the industry. However, the permanent magnet synchronous motor in the related art still has the conditions of low efficiency and low power density.

Disclosure of Invention

The present invention is directed to solving one of the technical problems of the prior art or the related art.

To this end, a first aspect of the invention proposes a stator.

A second aspect of the invention proposes an electric machine.

A third aspect of the present invention provides a compressor.

A fourth aspect of the present invention provides a refrigeration apparatus.

A fifth aspect of the invention proposes a vehicle.

In view of this, according to a first aspect of the present invention, there is provided a stator comprising: the stator core comprises a plurality of segmented cores, each segmented core comprises a yoke part and a tooth part positioned on the inner side of the yoke part, and any two adjacent segmented cores are enclosed to form a winding slot; the stator winding is wound on the tooth part and extends into the winding slot; the outer diameter D1 of the stator core and the inner diameter D2 of the stator core meet the requirement that D2/D1 are more than or equal to 0.53 and less than or equal to 0.65.

The stator provided by the invention comprises a stator core and a stator winding. Wherein, including a plurality of piecemeal iron cores through setting for stator core, enclose into annular stator core by a plurality of piecemeal iron cores continuous distribution, enclose by two adjacent piecemeal iron cores and close formation wire winding groove, be favorable to improving the full rate in groove in wire winding groove, improve the volume that stretches into the stator winding in the wire winding groove to reduce the motor copper loss. In addition, by setting the ratio of the inner diameter D2 of the stator core to the outer diameter D1 of the stator core to be 0.53 or more and 0.65 or less, the stator core has a rotor hole into which the rotor extends, the size of the inner diameter of the stator core can determine the size of the rotor, and thus the amount of magnets used on the rotor, and the size of the inner diameter and the outer diameter of the stator core can determine the size of the winding slots, and thus the amount of stator windings located in the winding slots. Therefore, by setting the ratio of the inner diameter D2 of the stator core to the outer diameter D1 of the stator core to be more than or equal to 0.53 and less than or equal to 0.65, on one hand, the situation that the ratio of the inner diameter D2 of the stator core to the outer diameter D1 of the stator core is too small and less than 0.53, so that the inner diameter of the stator core is too small and the outer diameter is too large, so that the using amount of magnets on a rotor is reduced, the using amount of stator windings is increased, the copper loss of the motor is larger than the iron loss, and the; on the other hand, the problem that the ratio of the two is too large and is larger than 0.65, so that the inner diameter of the stator core is too large, the outer diameter of the stator core is too small, the using amount of the magnet on the rotor is increased, the using amount of the stator winding is reduced, the copper loss of the motor is smaller than the iron loss, and the efficiency of the motor is still reduced under the condition of outputting rated torque. Through the ratio more than or equal to 0.53 and less than or equal to 0.65 of the internal diameter D2 and the external diameter D1 who sets for stator core, improvement stator winding quantity that can maximize, also be the copper line quantity to and the quantity of magnet, reach motor copper loss and iron loss balance, realize motor high power density, make the motor have small, light in weight, efficient advantage.

In addition, the size of the rotor is a main influence factor of the rotational inertia of the rotor, the rotational inertia is in direct proportion to the 2 nd power of the outer diameter of the rotor, and the compressor is a periodic fluctuation load, so that the rotational inertia is large, and the ratio of the inner diameter D2 of the stator core to the outer diameter D1 of the stator core is set to be more than or equal to 0.53 and less than or equal to 0.65, so that the inner diameter D2 of the stator core is large, the motor has large rotational inertia, and stable control of the rotating speed is facilitated.

In addition, according to the stator in the above technical solution provided by the present invention, the following additional technical features may be further provided:

in the above technical solution, preferably, the stator windings wound on two adjacent teeth and having different phases are interphase windings; the stator further includes a first insulator disposed at least at a mid-gap of the inter-phase windings.

In the technical scheme, the stator windings which are wound on the two adjacent tooth parts and are respectively in different phases are set as the phase-to-phase windings, and the first insulating part is arranged at the middle gap of the phase-to-phase windings, so that the voltage difference between the stator windings in different phases can be eliminated, the electric isolation effect is achieved, and the insulating property of the motor is improved. Alternatively, the first insulating member is insulating paper, but of course, the first insulating member may be constructed of a portion of the insulating end plate protruding into the winding slot.

In this case, it should be noted that, in the present application, a plurality of turns of the coil wound around one tooth portion is defined as one stator winding. The first insulator is disposed between two stator windings that are adjacent and out of phase.

In any of the above-described aspects, preferably, the first insulator is provided at a gap between the stator windings on any two adjacent teeth.

In the technical scheme, the first insulating part is further arranged at the gap between the stator windings on any two adjacent tooth parts, so that the voltage difference between the two adjacent stator windings is further eliminated, the insulating property of the motor is further improved, and the stable output of the rotating speed of the motor is facilitated.

In any of the above technical solutions, preferably, the stator further includes: and the second insulating part is arranged in the winding slot, and at least part of the second insulating part extends along the slot wall of the winding slot.

In the technical scheme, the second insulating part is arranged in the winding slot, and the second insulating part at least extends along the slot wall of the winding slot, so that the second insulating part can partially comprise the stator winding positioned in the winding slot, the insulation reliability of the motor is further improved, and the stator winding and the stator core have enough insulation strength. Optionally, the second insulating part is slot insulating paper, so that the thickness is small, the electrical insulating property is good, the occupied space in the winding slot is small, and the sufficient winding space in the winding slot can be effectively ensured. Of course, the second insulator may be constructed of a portion of the insulating end plate protruding into the winding slot.

In any of the above technical solutions, preferably, the stator further includes: the two ends of each block iron core are provided with one insulating end plate; and the stator winding is wound on the tooth part coated by the insulating end plate and the second insulating piece.

In this technical scheme, the stator still includes a plurality of insulating end plates, both ends through at every piecemeal iron core set up an insulating end plate respectively, make insulating end plate and second insulator can the cladding in the outside of tooth portion, make stator winding around establish on the tooth portion after insulating end plate and second insulator cladding, also the stator winding is around establishing in the outside of insulating end plate and second insulator, improved the insulating nature between stator winding and the stator core, can ensure that motor insulation reliability is high.

In any of the above technical solutions, preferably, the width of the notch of the winding slot ranges from 1mm to 4 mm; the distance between the stator windings wound on two adjacent teeth ranges from 0.5mm to 2 mm.

In this technical scheme, under the condition that first insulator sets up between two stator winding on two adjacent tooth, through setting for the width scope of the notch of winding groove to be 1mm to 4mm, and set for the interval scope of winding the stator winding of establishing on two adjacent tooth to be 0.5mm to 2mm, be favorable to the installation and the fixed of first insulator, avoid first insulator from between two stator winding, and from the notch of winding groove departure, and influence the insulating properties of motor, ensure that first insulator firmly fixes in the winding groove. In addition, no matter whether the first insulating part is arranged between the two stator windings on the two adjacent tooth parts or not, the range of the distance between the stator windings on the two adjacent tooth parts is set to be 0.5 mm-2 mm, so that the influence on the insulation reliability of the motor caused by the undersize distance between the two stator windings can be avoided, and the influence on the slot filling rate of the winding slot caused by the overlarge distance between the two stator windings can also be avoided.

In any of the above solutions, preferably, the stator winding wound around the plurality of teeth is configured as a three-phase winding.

In any of the above embodiments, preferably, the plurality of segment cores are connected together by yoke portions thereof, and enclose to form an annular stator core. Further, the yoke parts of two adjacent block iron cores are welded and connected at the position close to the outer side wall of the block iron core.

In this technical scheme, enclose to close through setting for a plurality of piecemeal iron cores and form the annular stator core of circle, because a plurality of piecemeal iron cores can separate each other and expand before fixed connection is in the same place, be favorable to enlarging the volume in wire winding groove for can stretch into more stator winding in the wire winding groove, improve the full rate in groove, thereby reduce the motor copper loss. In addition, two adjacent block iron cores are welded together through the yoke parts, namely the welding is carried out on one side wall of each block iron core opposite to the tooth part of the block iron core, and compared with the prior art that two partially overlapped block iron cores are connected together by pins, on one hand, the connection is firm in a welding connection mode, the connection is convenient and fast, and the cylindricity of the stator iron core can be ensured; on the other hand, the damping effect is achieved, and the vibration amplitude of the motor is reduced. In addition, the outer side wall of the yoke part, which is close to the segmented iron core, is welded, so that the influence of the welding point on the cylindricity and the like of the stator iron core can be effectively avoided.

A second aspect of the present invention provides an electric machine comprising: a rotor; and the stator in any one of the technical schemes is arranged at the periphery of the rotor in a surrounding mode.

The motor provided by the present invention has the stator according to any of the above technical solutions, and further has the beneficial effects of any of the above technical solutions, which are not described herein again.

In any of the above solutions, preferably, the slot poles of the motor are matched to 12 slots, 8 poles, 12 slots, 10 poles or 9 slots, 6 poles.

In the technical scheme, the slot poles of the motor are matched into 12 slots and 8 poles, the number of the winding slots of the stator is 12, the number of the magnet poles on the rotor is 8, and the outer diameter D1 of the stator core and the inner diameter D2 of the stator core are matched to meet the requirement that D2/D1 are more than or equal to 0.53 and less than or equal to 0.65, so that the number of the winding slots is not excessive, the winding slots are ensured to have enough space, and enough stator windings are accommodated. In addition, the number of the magnetic poles is set to be 8, so that the number of the magnetic poles is not excessive, the copper loss and the iron loss of the motor are the same or similar, and the motor has the advantages of high power density, small volume, light weight and high efficiency under the condition of outputting rated torque. Similarly, setting the slot poles of the motor to be matched into 12 slots and 10 poles and 9 slots and 6 poles has similar beneficial effects, and ensures that the motor has sufficiently high power density under the condition of outputting rated torque.

In any of the above aspects, preferably, the rotor includes a rotor core formed by stacking a plurality of electromagnetic steel sheets, and a thickness of the electromagnetic steel sheets constituting the rotor core is 0.5mm or less.

In this technical solution, the rotor core is formed by stacking a plurality of electromagnetic steel plates, and optionally, a plurality of silicon steel plates. The thickness of the electromagnetic steel plate forming the rotor iron core is set to be less than or equal to 0.5mm, so that the influence of the excessive thickness of the electromagnetic steel plate on the operation efficiency and the power density of the motor is avoided.

A third aspect of the present invention provides a compressor comprising: the motor according to any one of the above aspects.

The compressor provided by the invention has the advantages of any one of the above technical schemes due to the motor in any one of the above technical schemes, and the details are not repeated herein.

A fourth aspect of the present invention provides a refrigeration apparatus comprising: a compressor according to any one of the preceding claims.

The refrigeration equipment provided by the invention has the advantages of any one of the technical schemes as the compressor in any one of the technical schemes, and further has the advantages of any one of the technical schemes, which are not repeated herein.

Optionally, the refrigeration device is an air conditioner.

A fifth aspect of the invention proposes a vehicle comprising: the motor or the refrigeration equipment according to any one of the above technical solutions.

The vehicle provided by the invention has the advantages of any technical scheme due to the fact that the vehicle is provided with the motor and/or the refrigeration equipment, and the vehicle is not repeated herein.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a schematic structural view of a stator core of an embodiment of the present invention;

FIG. 2 shows a schematic structural view of a stator of one embodiment of the present invention;

FIG. 3 shows a schematic structural view of a rotor of one embodiment of the present invention;

FIG. 4 is a graph illustrating the efficiency variation of a motor constructed with the stator of FIG. 2 in combination with the rotor of FIG. 3 for different ratios of the inside diameter to the outside diameter of the stator core;

fig. 5 is a graph showing a comparison of the efficiency of a motor constructed by the stator shown in fig. 2 in combination with the rotor shown in fig. 3 and a motor of the related art.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 3 is:

10 stator, 12 stator core, 122 segmented core, 124 yoke, 126 tooth, 128 outer sidewall, 14 winding slot, 16 stator winding, 18 first insulator, 20 second insulator, 22 insulating end plate, 24 rotor, 242 rotor core, 244 magnet.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The stator 10 and the rotor 24 according to some embodiments of the present invention are described below with reference to fig. 1 to 3.

As shown in fig. 1 and 2, an embodiment of the first aspect of the present invention provides a stator 10, including: the stator core 12, the stator core 12 includes a plurality of segmented cores 122, each segmented core 122 includes a yoke portion 124 and a tooth portion 126 located inside the yoke portion 124, and any two adjacent segmented cores 122 enclose to form a winding slot 14; a stator winding 16 wound on the tooth portion 126 and extending into the winding slot 14; wherein, the outer diameter D1 of the stator core 12 and the inner diameter D2 of the stator core 12 satisfy 0.53 < D2/D1 < 0.65.

The stator 10 includes a stator core 12 and a stator winding 16. Wherein, through setting for stator core 12 to include a plurality of piecemeal iron cores 122, enclose into annular stator core 12 by a plurality of piecemeal iron cores 122 continuous distribution, enclose by two adjacent piecemeal iron cores 122 and close and form winding slot 14, be favorable to improving the full rate of groove of winding slot 14, improve the volume of the stator winding 16 that stretches into in winding slot 14 to reduce the motor copper loss. Further, by setting the ratio of the inner diameter D2 of the stator core 12 to the outer diameter D1 of the stator core 12 to be 0.53 or more and 0.65 or less, the size of the inner diameter of the stator core 12 can determine the size of the rotor 24 and hence the amount of the magnets 244 on the rotor 24 since the stator core 12 has the rotor 24 hole into which the rotor 24 is inserted, and the size of the inner diameter and the outer diameter of the stator core 12 can determine the size of the winding slots 14 and hence the amount of the stator windings 16 located in the winding slots 14. Therefore, by setting the ratio of the inner diameter D2 of the stator core 12 to the outer diameter D1 of the stator core 12 to be greater than or equal to 0.53 and less than or equal to 0.65, on one hand, the situation that the ratio of the inner diameter D2 of the stator core 12 to the outer diameter D1 of the stator core 12 is too small and less than 0.53, so that the inner diameter of the stator core 12 is too small and the outer diameter is too large, so that the usage amount of the magnets 244 on the rotor 24 is reduced, the usage amount of the stator winding 16 is increased, the copper loss of the motor is greater than the iron; on the other hand, the problem that the ratio of the two is too large and is larger than 0.65, so that the inner diameter of the stator core 12 is too large and the outer diameter is too small, the using amount of the magnet 244 on the rotor 24 is increased, and the using amount of the stator winding 16 is reduced, so that the copper loss of the motor is smaller than the iron loss, and the efficiency of the motor is still reduced under the condition of outputting rated torque. By setting the ratio of the inner diameter D2 to the outer diameter D1 of the stator core 12 to be more than or equal to 0.53 and less than or equal to 0.65, the using amount of the stator winding 16, namely the using amount of copper wires, and the using amount of the magnet 244 can be maximized, the balance between the copper loss and the iron loss of the motor is achieved, and the high power density of the motor is realized, so that the motor has the advantages of small volume, light weight and high efficiency.

In addition, the size of the rotor 24 is a main influence factor of the rotational inertia of the rotor 24, the rotational inertia is proportional to the 2 nd power of the outer diameter of the rotor 24, and since the compressor is a periodic fluctuating load and the rotational inertia is large, by setting the ratio of the inner diameter D2 of the stator core 12 to the outer diameter D1 of the stator core 12 to be 0.53 or more and 0.65 or less, the inner diameter D2 of the stator core 12 is made large, so that the motor has large rotational inertia, and is favorable for stable control of the rotating speed.

Alternatively, the outer diameter D1 of the stator core 12 is 105mm, the inner diameter D2 of the stator core 12 is 64.4mm, and D2/D1 is approximately 0.61.

Wherein each of the segmented cores 122 is formed by stacking a plurality of electromagnetic steel plates, the plurality of segmented cores 122 are joined and combined into the ring-shaped stator core 12 by the yoke portions 124 thereof, and optionally, the plurality of segmented cores 122 are welded together at the outer diameter by the yoke portions 124 thereof. The stator core 12 includes a plurality of segment cores 122, and functions such as opening and closing of the annular stator core 12 can be realized. The stator core 12 defines a rotor 24 hole into which the rotor 24 extends, and the plurality of winding slots 14 are symmetrically distributed around the center of the rotor 24 hole.

In some embodiments, as shown in fig. 2, the stator windings 16 wound on two adjacent teeth 126 and out of phase are inter-phase windings; the stator 10 further comprises a first insulator 18, the first insulator 18 being arranged at least at the mid-gap of the inter-phase windings.

In this embodiment, by setting the stator windings 16 wound on two adjacent teeth 126 and respectively in different phases as phase-to-phase windings and providing the first insulating member 18 at the middle gap of the phase-to-phase windings, the voltage difference between the stator windings 16 in different phases can be eliminated, thereby performing an electrical isolation function and improving the insulating performance of the motor. Alternatively, the first insulating member 18 is an insulating paper, but the first insulating member 18 may be constructed of a portion of the insulating end plate 22 protruding into the winding slot 14.

Note that, in the present application, a multi-turn coil wound around one tooth portion 126 is set as one stator winding 16. The first insulator 18 is disposed between two stator windings 16 that are adjacent and out of phase.

In some embodiments, as shown in fig. 2, the first insulator 18 is disposed at the gap between the stator windings 16 on any two adjacent teeth 126.

In this embodiment, the first insulating member 18 is further disposed at the gap between the stator windings 16 on any two adjacent teeth portions 126, so as to further eliminate the voltage difference between two adjacent stator windings 16, further improve the insulating performance of the motor, and facilitate stable output of the motor rotation speed.

In some embodiments, as shown in fig. 2, the stator 10 further includes: and a second insulating member 20 disposed in the winding slot 14, wherein at least a portion of the second insulating member 20 extends along a slot wall of the winding slot 14.

In this embodiment, by providing the second insulating member 20 in the winding slot 14 such that the second insulating member 20 extends at least along the slot wall of the winding slot 14, the stator winding 16 in the winding slot 14 may be partially included, and the insulation reliability of the motor may be further improved such that the stator winding 16 has sufficient insulation strength with respect to the stator core 12. Optionally, the second insulating member 20 is made of slot insulating paper, and has a small thickness, good electrical insulating property, and occupies a small space in the winding slot 14, so that it is effectively ensured that the winding slot 14 has a sufficient winding space. Of course, the second insulator 20 may also be constructed from the portion of the insulating end plate 22 that extends into the winding slot 14.

In some embodiments, as shown in fig. 2, the stator 10 further includes: a plurality of insulating end plates 22, one insulating end plate 22 being provided at both ends of each block core 122; the stator winding 16 is wound around the insulating end plate 22 and the teeth 126 covered with the second insulating member 20.

In this embodiment, the stator 10 further includes a plurality of insulating end plates 22, and by respectively providing one insulating end plate 22 at each of the two ends of each of the segmented cores 122, the insulating end plate 22 and the second insulating member 20 can be wrapped outside the tooth 126, so that the stator winding 16 is wound around the tooth 126 wrapped by the insulating end plate 22 and the second insulating member 20, that is, the stator winding 16 is wound around the insulating end plate 22 and the second insulating member 20, thereby improving the insulation between the stator winding 16 and the stator core 12, and ensuring high reliability of the motor insulation.

In some embodiments, as shown in fig. 1, the width W of the slot opening of the winding slot 14 ranges from 1mm to 4 mm; the pitch of the stator winding 16 wound on two adjacent teeth 126 ranges from 0.5mm to 2 mm.

In this embodiment, in the case where the first insulating member 18 is provided between two stator windings 16 on two adjacent teeth 126, by setting the width W of the notch of the winding slot 14 to be in the range of 1mm to 4mm and setting the pitch range around the stator windings 16 on two adjacent teeth 126 to be in the range of 0.5mm to 2mm, the installation and fixation of the first insulating member 18 are facilitated, the first insulating member 18 is prevented from flying out from between the two stator windings 16 and from the notch of the winding slot 14 to affect the insulating performance of the motor, and it is ensured that the first insulating member 18 is firmly fixed in the winding slot 14. In addition, no matter whether the first insulating member 18 is arranged between the two stator windings 16 on the two adjacent tooth portions 126, by setting the interval range of the stator windings 16 on the two adjacent tooth portions 126 to be 0.5mm to 2mm, the influence of the too small interval between the two stator windings on the two adjacent tooth portions 126 on the insulation reliability of the motor can be avoided, and the influence of the too large interval between the two stator windings on the slot filling rate of the winding slot 14 can also be avoided.

Alternatively, the width W of the notch of the winding slot 14 is 2.6mm, and the pitch of the stator winding 16 wound on two adjacent teeth 126 is 1 mm; or the width W of the notch of the winding slot 14 is 1.5mm, and the pitch of the stator winding 16 wound on the adjacent two teeth 126 is 0.8 mm.

In some embodiments, the stator windings 16 wound on the plurality of teeth 126 are configured as three-phase windings. That is, the stator winding 16 is wound around the teeth 126 of the segmented core 122 to form a three-phase winding coil of the motor A, B, C.

In some embodiments, a plurality of segmented cores 122 are connected together by their yoke portions 124 and enclose a circular ring shaped stator core 12. Further, the yoke portions 124 of two adjacent segmented cores 122 are welded adjacent to the outer side wall 128 of the segmented core 122.

In this embodiment, the plurality of segmented cores 122 are arranged to enclose the annular stator core 12, and the plurality of segmented cores 122 can be separated from each other and unfolded before being fixedly connected together, so that the volume of the winding slot 14 can be enlarged, more stator windings 16 can be inserted into the winding slot 14, the slot filling rate is improved, and the copper loss of the motor is reduced. In addition, by welding two adjacent segmented iron cores 122 together through the yoke portions 124 thereof, that is, welding at a side wall of the segmented iron core 12 opposite to the tooth portions 126 thereof, compared with the prior art that two overlapped segmented iron cores 122 are connected together by using pins, on one hand, the connection is firm by welding, and the connection is convenient and fast, and the cylindricity of the stator iron core 12 can be ensured; on the other hand, the damping effect is achieved, and the vibration amplitude of the motor is reduced. In addition, by welding the yoke portion 124 at the outer side wall 128 close to the segmented core 122, it is possible to effectively avoid the influence of the welding point on the cylindricity of the stator core 12 and the like.

As shown in fig. 1 to 3, a second aspect embodiment of the present invention provides an electric machine, including: a rotor 24; and a stator 10 as in any of the previous embodiments, the stator 10 being peripherally disposed about the rotor 24.

The motor provided by the present invention has the stator 10 according to any of the above embodiments, and further has the beneficial effects of any of the above embodiments, which are not described herein again.

In some embodiments, as shown in fig. 1-3, the slot poles of the motor are mated to 12 slots 8 poles or 12 slots 10 poles or 9 slots 6 poles.

In this embodiment, the slot poles of the motor are set to be matched into 12 slots and 8 poles, the number of the segmented iron cores 122 is 12, the number of the winding slots 14 is 12, the number of the magnetic poles on the rotor 24 is 8, the number of the magnets 244 is 8 or the number of other permanent magnets is 8, the outer diameter D1 of the matched stator iron core 12 and the inner diameter D2 of the stator iron core 12 meet 0.53 ≤ D2/D1 ≤ 0.65, so that the number of the winding slots 14 is not excessive, the winding slots 14 are ensured to have a large enough space to accommodate enough stator windings 16, and in addition, the number of the magnetic poles is set to be 8, so that the motor is ensured not to have excessive number, and the copper loss and the iron loss of the motor are equal or similar to each other, thereby realizing the advantages of high power density, small volume, light weight and high efficiency under the condition of outputting rated torque. Similarly, setting the slot poles of the motor to be matched into 12 slots and 10 poles and 9 slots and 6 poles has similar beneficial effects, and ensures that the motor has sufficiently high power density under the condition of outputting rated torque.

In some embodiments, rotor 24 includes rotor core 242, rotor core 242 being formed by stacking a plurality of electromagnetic steel sheets, and the thickness of the electromagnetic steel sheet constituting rotor core 242 being equal to or less than 0.5 mm.

In this embodiment, the rotor core 242 is stacked from a plurality of electromagnetic steel plates, and optionally, from a plurality of silicon steel plates. By setting the thickness of the electromagnetic steel sheet constituting the rotor core 242 to be 0.5mm or less, it is avoided that the thickness of the electromagnetic steel sheet is excessively thick to affect the operation efficiency and the power density of the motor.

Alternatively, the electromagnetic steel plates constituting the rotor core 242 and the stator core 12 each have a thickness of 0.3 mm.

Hereinafter, a motor according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 3.

As shown in fig. 1 to 3, the motor includes a stator 10 and a rotor 24. The motor slot poles are matched into 12 slots and 8 poles. The stator core 12 is constituted by 12 segmented cores 122, and each segmented core 122 is formed by laminating 0.3mm electromagnetic steel plates. The thickness of the silicon steel plate stacked to constitute the rotor core 242 is 0.3 mm.

The stator 10 includes a stator core 12, the stator core 12 having a rotor 24 hole through which a rotor 24 passes, the stator 10 further including an insulation assembly, a plurality of winding slots 14 disposed around the rotor 24 hole, and a stator winding 16 mounted in the winding slots; the plurality of winding slots 14 are arranged in a central symmetrical manner around the rotor 24 bore. The insulation assembly includes insulation end plates 22, slot insulation paper (one kind of the second insulation 20) and phase-to-phase insulation paper (one kind of the first insulation 18), the insulation end plates 22 being provided at both end portions of the segmented core 122, the slot insulation paper being provided in the winding slots 14, the phase-to-phase insulation paper being provided between the stator windings 16 on the adjacent two teeth portions 126 and being out of phase. The stator winding 16 is wound by a plurality of turns in the winding slots 14 defined by the insulating end plates 22 and the slot insulating paper, and the stator winding 16 is wound in the teeth 126 of the segmented core 122 to form a three-phase winding coil of the motor A, B, C. After the stator winding 16 is wound, the segmented cores 122 are welded together at the junction of the outer diameters by the yoke portion 124 to form a complete ring shape, forming the stator 10. The width W of the slot opening of the winding slot 14 is 2.6mm, the stator windings 16 which are out of phase on any adjacent block iron core 122 are interphase windings, the width of the gap in the interphase winding is 1mm, and the distance between two stator windings 16 on the other adjacent block iron cores 122 is also 1 mm.

In this embodiment, the outer diameter D1 of the stator core 12 is 105mm, and the inner diameter D2 of the stator core 12 is 64.4mm, satisfying D2/D1 of 0.61. The design of the inner diameter of stator core 12 determines the size of rotor 24 and determines the amount of magnets 244 used, and the size of the inner and outer diameters of stator core 12 determines the size of winding slots 14 and, thus, the amount of copper wire used to form stator winding 16. Stator core 12 internal diameter sets up the undersize, rotor 24 is small-size, magnet 244 quantity is little, the motor iron loss is little, motor magnetic load is little, electric load is big, motor current is big, although winding groove 14 is bulky can increase the copper line quantity, because of electric load is big, motor current is big, lead to copper to decrease greatly, can lead to copper to decrease and be greater than the iron loss, the skew of motor efficiency optimum point toward little torsion point, promptly guarantee that the motor has higher efficiency promptly, the motor can only output the torsion that is less than rated torque, the motor only is suitable for little torsion operation condition. If the inner diameter of the stator core 12 is too large, the size of the rotor 24 is large, the amount of the magnet 244 is large, the iron loss of the motor is large, the magnetic load of the motor is large, the electric load is small, the motor current is small, but the volume of the winding slot 14 is small, the amount of the copper wire is small, the winding resistance is large, the iron loss is larger than the copper loss, the optimal point of the motor efficiency deviates to a large torque point, namely, the motor is ensured to have higher efficiency, the motor can only output torque larger than the rated torque, and the motor is only suitable for large torque operation conditions. In this embodiment, the outer diameter D1 of the stator core 12 is set to 105mm, the inner diameter D2 of the stator core 12 is set to 64.4mm, and D2/D1 is set to 0.61, so that the rated torque point, the copper loss and the iron loss of the motor are balanced, and the motor efficiency is optimized at the rated torque point.

Specifically, as shown in fig. 4, Tn is the rated load torque point. When D2/D1 is 0.45, the inner diameter D2 of the stator core 12 is small, the amount of the magnets 244 is small, the amount of the copper wires is large, and the optimal point of the motor efficiency is 0.86 × Tn, so that the motor is suitable for the working condition with small torque force. When the D2/D1 is equal to 0.53 and 0.65, the motor magnet 244 and the copper wire are used properly, the optimal point of the motor efficiency is near the rated load torque point Tn, and the efficiency is high. When D2/D1 is 0.75, the optimal point of the motor efficiency is 1.43 Tn, and the motor is suitable for a high-torque working condition. As shown in fig. 5, in the related art, the stator core 12 is an integral structure, the slot fullness of the winding slots 14 is limited, a large gap is formed in the winding slots 14 of the motor, the winding cannot be wound in the winding slots 14, and the slot fullness is low, but compared with the related art, the stator core 12 is constructed by adopting a plurality of the segmented cores 122, the winding operation space is large, the winding can be wound in the winding slots 14, the utilization rate of the winding slots 14 can be increased by 50%, the use amount of copper wires can be increased by 50%, under the same electrical density condition, a larger current can be introduced, a larger torque force can be realized, so that a high power density is realized, a small-sized motor meets the operation requirement of a large torque force, and the weight of the motor is lighter compared with. Compared with the motor in the related art, the efficiency relative value (namely the efficiency subtraction value of the two) of the motor can be improved by 1.6 percent.

A third aspect of the present invention provides a compressor, including: an electrical machine as claimed in any one of the preceding embodiments.

The compressor provided by the present invention has the advantages of any of the above embodiments due to the motor of any of the above embodiments, which are not repeated herein.

A fourth aspect of the present invention provides a refrigeration apparatus, comprising: a compressor as in any one of the preceding embodiments.

The refrigeration equipment provided by the invention has the advantages of any of the above embodiments due to the compressor provided by any of the above embodiments, which are not repeated herein.

Optionally, the refrigeration device is an air conditioner.

An embodiment of a fifth aspect of the invention provides a vehicle comprising: a motor or refrigeration appliance as in any one of the above embodiments.

The vehicle provided by the invention has the advantages of any embodiment due to the motor and/or the refrigeration equipment in any embodiment, and further, the description is omitted here.

In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A stator, comprising:

the stator core comprises a plurality of segmented cores, each segmented core comprises a yoke part and a tooth part positioned on the inner side of the yoke part, and any two adjacent segmented cores are enclosed to form a winding slot;

the stator winding is wound on the tooth part and extends into the winding slot;

the outer diameter D1 of the stator core and the inner diameter D2 of the stator core meet the condition that D2/D1 are more than or equal to 0.53 and less than or equal to 0.65.

2. The stator according to claim 1,

stator windings which are wound on two adjacent tooth parts and are different in phase are interphase windings;

the stator further includes a first insulator disposed at least at a mid-gap of the inter-phase windings.

3. The stator according to claim 2,

the first insulator is provided at a gap between the stator windings on any adjacent two of the teeth portions.

4. A stator according to any one of claims 1 to 3, further comprising:

and the second insulating piece is arranged in the winding slot, and at least part of the second insulating piece extends along the slot wall of the winding slot.

5. The stator of claim 4, further comprising:

the two ends of each block iron core are respectively provided with one insulating end plate;

and the stator winding is wound on the tooth part which is coated by the insulating end plate and the second insulating piece.

6. The stator according to any one of claims 1 to 3,

the width range of the notch of the winding groove is 1mm to 4 mm;

the distance range of the stator windings wound on two adjacent tooth parts is 0.5mm to 2 mm.

7. The stator according to any one of claims 1 to 3,

the stator winding wound on the plurality of teeth is configured as a three-phase winding.

8. The stator according to any one of claims 1 to 3,

the plurality of segmented iron cores are connected together through yoke parts of the segmented iron cores and are encircled to form the annular stator iron core;

the yoke parts of the two adjacent segmented iron cores are welded and connected at the position close to the outer side wall of the segmented iron core.

9. An electric machine, comprising:

a rotor; and

a stator as claimed in any one of claims 1 to 8, said stator being peripherally disposed about said rotor.

10. The electric machine of claim 9,

the slot poles of the motor are matched into 12 slots, 8 poles, 12 slots, 10 poles or 9 slots and 6 poles.

11. The electric machine of claim 9,

the rotor includes a rotor core formed by stacking a plurality of electromagnetic steel sheets, the thickness of the electromagnetic steel sheets constituting the rotor core being 0.5mm or less.

12. A compressor, comprising:

an electric machine as claimed in any one of claims 9 to 11.

13. A refrigeration apparatus, comprising:

the compressor of claim 12.

14. A vehicle, characterized by comprising:

an electric motor as claimed in claim 9, or a refrigeration appliance as claimed in claim 13.