CN111555477B

CN111555477B - Motor, compressor and refrigeration plant

Info

Publication number: CN111555477B
Application number: CN202010456074.1A
Authority: CN
Inventors: 杨森; 邱小华; 张德金; 陈超
Original assignee: Anhui Meizhi Precision Manufacturing Co Ltd
Current assignee: Anhui Meizhi Precision Manufacturing Co Ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2021-09-28
Anticipated expiration: 2040-05-26
Also published as: CN111555477A

Abstract

The invention provides a motor, a compressor and refrigeration equipment. The stator assembly comprises a stator core and a winding, the stator core is provided with a plurality of stator convex teeth, and the winding is wound on the plurality of stator convex teeth; the rotor assembly includes a permanent magnet; wherein the intrinsic coercivity of the permanent magnet is configured to be suitable for adjusting the number of stator lobes to the number of phases of the winding. The motor that this application provided for, the number of the stator dogtooth of motor and the looks number ratio of winding and the intrinsic coercive force looks adaptation of permanent magnet, when guaranteeing the performance of motor, make heavy rare earth element obtain reasonable utilization, avoid when the performance of motor has reached the user demand, still use the higher permanent magnet of the quality percentage of heavy rare earth element and have the problem of extravagant national strategic type resource, be favorable to reducing the use of national important strategic resource, and reduce the manufacturing cost of motor.

Description

Motor, compressor and refrigeration plant

Technical Field

The invention relates to the technical field of refrigeration equipment, in particular to a motor, a compressor and refrigeration equipment.

Background

At present, in order to adapt to the application environment of a household air conditioner, most of permanent magnets of a variable frequency motor are neodymium iron boron permanent magnets which contain heavy rare earth elements and have high coercive force, but with the annual increase of the total amount of the variable frequency motor type, the consumed national strategic resource heavy rare earth elements (especially dysprosium and terbium) also increase year by year. Therefore, how to reduce the consumption of strategic resources of heavy rare earth elements becomes a problem which needs to be solved at present.

Disclosure of Invention

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

To this end, a first aspect of the invention proposes an electric machine.

A second aspect of the present invention proposes a compressor.

A third aspect of the invention provides a refrigeration apparatus.

In view of this, a first aspect of the present invention provides a motor including: the stator assembly comprises a stator core and a winding, the stator core is provided with a plurality of stator convex teeth, and the winding is wound on the plurality of stator convex teeth; a rotor assembly including a permanent magnet; wherein the intrinsic coercivity of the permanent magnet is configured to be suitable for adjusting the number of stator lobes to the number of phases of the winding.

The invention provides a motor which comprises a stator assembly and a rotor assembly, wherein the stator assembly comprises a stator core and a winding, the stator core is provided with a plurality of stator convex teeth, the winding is wound on the plurality of stator convex teeth, and the rotor assembly comprises a permanent magnet. Because the mass percentage of the heavy rare earth elements (such as dysprosium and/or terbium) in the magnet is positively correlated with the magnitude of the intrinsic coercive force of the permanent magnet, and the heavy rare earth elements belong to the national strategic resources, and the manufacturing cost of the motor is higher, the method adjusts the number ratio of the stator convex teeth to the number ratio of the windings according to the intrinsic coercive force of the permanent magnet, so that the number ratio of the stator convex teeth of the motor to the number ratio of the windings is matched with the intrinsic coercive force of the permanent magnet, ensures the service performance of the motor, reasonably utilizes the heavy rare earth elements, avoids the problem that the national strategic resources are wasted because the permanent magnet with the higher mass percentage of the heavy rare earth elements is still used when the performance of the motor reaches the use requirement, is favorable for reducing the use of national strategic resources, and reduces the manufacturing cost of the motor.

In addition, the motor in the above technical solution provided by the present invention may further have the following additional technical features:

in the technical scheme, further, the intrinsic coercive force of the permanent magnet is more than 1800 kA/m; the number of the stator convex teeth is less than or equal to 3 compared with the number of the phases of the windings.

In the technical scheme, the intrinsic coercive force of the permanent magnet is set to be larger than 1800kA/m, the phase ratio of the number of the motor stator convex teeth to the number of the windings is set to be less than or equal to 3, the performance of the motor (such as a 9-slot 6-pole brushless motor) can meet the use requirement at the moment, and particularly the motor at the moment can meet the requirement in the operation range of a variable frequency compressor of a household air conditioner. Because the intrinsic coercive force of the permanent magnet is more than 1800kA/m and less than the intrinsic coercive force of the permanent magnet containing heavy rare earth elements dysprosium and terbium in the related technology, which is more than or equal to 1830kA/m, the permanent magnet without heavy rare earth elements or with less heavy rare earth elements can be selected, thereby reducing the use of heavy rare earth elements (such as dysprosium and terbium) in the permanent magnet, reducing the manufacturing cost of the motor, saving scarce resources for the country, and meeting the use requirement of the motor and further expanding the application range of the product by directly applying the permanent magnet without heavy rare earth elements or with less heavy rare earth elements and with the intrinsic coercive force of more than 1800kA/m to the motor with the ratio of the number of stator convex teeth to the number of windings of less than or equal to 3 without changing the structure of the existing motor, and the consumption of strategic resources is reduced, and the method is suitable for popularization and application.

In any of the above technical solutions, further, the number of the stator teeth is 6 or 9; the number of phases of the winding is 3.

In the technical scheme, according to the fact that the intrinsic coercive force of the permanent magnet is larger than 1800kA/m, the number of the motor stator convex teeth can be set to be 6, meanwhile, the phase number of the motor winding is set to be 3, and therefore the performance of the motor, which enables the intrinsic coercive force of the permanent magnet to be larger than 1800kA/m and the ratio of the number of the stator convex teeth to the phase number of the winding to be 1, can meet the use requirement.

Further, according to the intrinsic coercivity of the permanent magnet being greater than 1800kA/m, the number of the stator teeth can be set to 9 or other numbers meeting the requirement, and similarly, when the intrinsic coercivity of the permanent magnet being greater than 1800kA/m, the performance of the motor in which the ratio of the number of the stator teeth to the number of phases of the winding is less than or equal to 3 can meet the use requirement of the motor (for example, a 9-slot 6-pole motor).

In any of the above technical solutions, further, the mass percentage of dysprosium and/or terbium in the permanent magnet ranges from 0 to 0.5%, or the mass percentage of heavy rare earth elements in the permanent magnet ranges from 0 to 0.5%.

In the technical scheme, the intrinsic coercive force of the permanent magnet is generally related to the content of heavy rare earth elements in the permanent magnet, particularly two elements of dysprosium and terbium, and because the heavy rare earth elements belong to national strategic resources, and the cost of the permanent magnet containing the heavy rare earth elements is generally higher, the motor provided by the application can select the permanent magnet with the mass percentage of dysprosium and/or terbium ranging from 0 to 0.5 percent, or select the permanent magnet with the mass percentage of the heavy rare earth elements ranging from 0 to 0.5 percent, only the intrinsic coercive force of the permanent magnet is required to be larger than 1800kA/m, and simultaneously the use requirement of the motor can be met by adjusting the phase number ratio of the number of the convex teeth of the motor to the winding to be less than or equal to 3, and simultaneously because the heavy rare earth elements contained in the permanent magnet reduce or do not contain the heavy rare earth elements, the production cost of the motor can be greatly reduced, the cost performance of the motor is improved.

In any of the above technical solutions, further, the winding is a concentrated winding group.

According to the technical scheme, under the conditions that the intrinsic coercive force of the permanent magnet is larger than 1800kA/m and the phase number ratio of the number of the convex teeth of the motor to the number of the windings is set to be less than or equal to 3, the windings of the motor are set to be concentrated winding groups, the length of the end parts of the concentrated winding groups is small, the performance of the motor is favorably improved, the motor can meet the operation requirements of different compressors, and the application range of products is enlarged.

In any one of the above technical solutions, further, the rotor assembly further includes a rotor core, one of the rotor core and the stator core is enclosed in the outer side of the other, the rotor core is provided with a mounting groove, and the permanent magnet is arranged in the mounting groove.

In the technical scheme, the rotor assembly further comprises a rotor core, the permanent magnet is arranged in the mounting groove of the rotor core to form a magnetic pole, and on one hand, the stator core is arranged around the outer side of the rotor core, namely the stator assembly is positioned on the outer side of the rotor assembly; on the other hand, rotor core encloses the outside of locating stator core, and the rotor subassembly is located stator module's the outside promptly, and stator core and rotor core's different positions can satisfy the demand of different motor types for to the motor of different grade type, through the number of adjusting the stator dogtooth according to the intrinsic coercive force of permanent magnet and the phase number ratio of winding, be favorable to when guaranteeing the performance of motor, the rational utilization heavy rare earth element reduces the consumption of national strategic type resource, and reduces the manufacturing cost of motor.

In any of the above technical solutions, further, a range of a ratio between an inner diameter of the stator core and an outer diameter of the stator core is: 0.57 to 0.6; and/or the number of mounting slots is 4 or 6.

In this technical scheme, through the ratio of the internal diameter of reasonable settlement motor stator core and stator core's external diameter to can adjust the performance of motor, and then satisfy the requirement to motor performance under the different operational environment, when guaranteeing motor working property, further improve the practicality of motor. Specifically, the ratio of the inner diameter of the stator core to the outer diameter of the stator core is reasonably set, so that the use requirement of the compressor for improving efficiency is favorably met.

Further, the number of the mounting grooves of the rotor core is set to be 4 or 6, so that the pole number of the motor is determined, wherein the number of the mounting grooves is p, the number of the mounting grooves is 4 or 6, and the pole number of the motor is 4 or 6, so that the application range of the motor is expanded.

In any of the above technical solutions, further, the motor provided by the present invention further includes: the cover body is arranged at the end part of the rotor iron core; the rotor core is provided with a mounting hole, and the connecting piece is connected with the mounting hole so as to connect the cover body and the rotor core.

In the technical scheme, the motor further comprises a cover body and a connecting piece, the rotor core is provided with a mounting hole, the cover body is arranged at the end part of the rotor core and is connected with the mounting hole through the connecting piece, the cover body is connected with the rotor core, the reliable connection of the rotor core and the cover body is realized, and the reliability of the motor is improved.

In any of the above technical solutions, further, the rotor core is further provided with a through hole, and the through hole is arranged at an interval with the mounting hole and the mounting groove.

In the technical scheme, the rotor core is provided with the through hole, and the through hole is arranged at intervals with the mounting hole and the mounting groove, so that when the compressor works, the through hole provides a channel for circulation of a refrigerant, the working reliability of the motor is guaranteed, and the working reliability of the compressor is guaranteed.

Furthermore, the number of the through holes is multiple, and the through holes are favorable for improving the amount of refrigerant circulating through the rotor core, so that the performance of the motor is further ensured.

According to a second aspect of the present invention, there is provided a compressor comprising: the casing to reach the motor as in any one of above-mentioned technical scheme, the inside of casing is located to the motor.

The compressor provided by the invention comprises the shell and the motor of any technical scheme, so that the compressor has all the beneficial effects of the motor, and the details are not repeated.

According to a third aspect of the present invention, there is provided a refrigeration apparatus comprising: the motor according to any one of the above aspects; or the compressor of the above technical scheme.

The refrigeration equipment provided by the invention comprises the motor in any one of the technical schemes; or the compressor of the above technical scheme, so that the motor or the compressor has all the beneficial effects, and the details are 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 diagram of a motor according to an embodiment of the present invention.

Wherein, the corresponding relationship between the reference numbers and the component names in fig. 1 is:

100 motor, 102 stator core, 104 stator convex tooth, 106 permanent magnet, 108 rotor core, 110 mounting groove, 112 mounting hole and 114 through hole.

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 motor 100, the compressor and the refrigerating apparatus according to some embodiments provided by the invention are described below with reference to fig. 1.

Example one

As shown in fig. 1, a first aspect of the present invention provides a motor 100 including: a stator assembly and a rotor assembly.

Specifically, the stator assembly includes a stator core 102 and a winding, the stator core 102 is provided with a plurality of stator teeth 104, the winding is wound around the plurality of stator teeth 104, and the rotor assembly includes a permanent magnet 106. Because the mass percentage of the heavy rare earth elements (such as dysprosium and/or terbium) in the permanent magnet 106 is positively correlated with the magnitude of the intrinsic coercive force of the permanent magnet 106, and the heavy rare earth elements belong to national strategic resources, and the manufacturing cost of the motor 100 is high, the motor 100 provided by the application adjusts the number of the stator lobes 104 and the phase ratio of the windings according to the intrinsic coercive force of the permanent magnet 106, so that the number of the stator lobes 104 of the motor 100 and the phase ratio of the windings are matched with the intrinsic coercive force of the permanent magnet 106, the heavy rare earth elements are reasonably utilized while the service performance of the motor 100 is ensured, the problem that the national strategic resources are wasted due to the fact that the permanent magnet 106 with the high mass percentage of the heavy rare earth elements is still used when the performance of the motor 100 reaches the use requirement is avoided, and the use of the national strategic resources is reduced, and reduces the manufacturing cost of the motor 100.

Specifically, the intrinsic coercive force of the permanent magnet related to the invention is the intrinsic coercive force of the permanent magnet at 20 ℃. When the sum of moment vectors of microscopic magnetic dipoles in the permanent magnet is reduced to 0, the applied reverse magnetic field strength is called the intrinsic coercive force of the magnet.

In particular, the compression method is currently applied to the compression of a variable frequency household air conditioner, wherein the permanent magnet adopted by the variable frequency motor is a neodymium iron boron permanent magnet containing dysprosium and terbium as heavy rare earth elements, and the intrinsic coercive force of the permanent magnet containing the heavy rare earth elements at 20 ℃ is equal to or more than 1830 kA/m. The heavy rare earth elements belong to non-renewable national important strategic resources and scarce resources. In order to reduce the dependence of the existing product on the heavy rare earth elements of key material resources, particularly the dependence on the heavy rare earth elements dysprosium and terbium, enrich the product types, reduce the cost of the compressor and improve the product competitiveness, it is found through research that properly reducing the intrinsic coercive force of the permanent magnet 106 can still meet the service performance of part of the motor 100, specifically, for example, when the intrinsic coercive force of the permanent magnet 106 at 20 ℃ is 1800kA/m or more, the service performance of the motor 100 matched with 9-slot 6-pole slot poles in the prior art can still be met by reasonably setting the ratio of the number of the stator convex teeth 104 to the number of phases of the windings, while the intrinsic coercive force of the permanent magnet 106 can be 1800kA/m or more by reducing the mass percentage of the heavy rare earth elements in the permanent magnet 106, or the intrinsic coercive force of the permanent magnet 106 can be 1800kA/m or more by using the permanent magnet without the heavy rare earth elements, thereby reducing the use of national strategic resources and reducing the manufacturing cost of the motor 100 while ensuring the service performance of the motor 100.

Further, the intrinsic coercivity of the permanent magnet 106 is greater than 1800 kA/m; the number of stator lobes 104 is equal to or less than 3 in relation to the number of phases of the winding.

Specifically, by setting the intrinsic coercivity of the permanent magnet 106 to be greater than 1800kA/m and setting the ratio of the number of the stator teeth 104 of the motor 100 to the number of the phases of the windings to be equal to or less than 3, the performance of the motor (e.g., a 9-slot 6-pole brushless motor) can meet the use requirement, and since the intrinsic coercivity of the permanent magnet 106 is greater than 1800kA/m and less than the intrinsic coercivity (equal to or greater than 1830kA/m) of the permanent magnet containing heavy rare earth elements dysprosium and terbium in the related art, the permanent magnet 106 not containing heavy rare earth elements or containing less heavy rare earth elements can be selected, so that the use of heavy rare earth elements (e.g., dysprosium and terbium) in the permanent magnet 106 can be reduced while the operation performance of the motor 100 is ensured, the manufacturing cost of the motor 100 can be reduced, scarce resources can be saved for the country, and the motor can be operated by adding, or adding, to the heavy rare earth elements, or adding, the heavy rare earth elements to the permanent magnet 106, the permanent magnet(s) to the motor 100) to meet the use requirement of the use of the inherent coercivity, the use of the heavy rare earth elements, the use of the heavy rare earth elements, the inherent coercivity, the heavy rare earth elements of the heavy elements of the, The permanent magnet 106 with the intrinsic coercivity larger than 1800kA/m is directly applied to the motor with the ratio of the number of the stator convex teeth to the number of the phases of the windings less than or equal to 3, so that the use requirement of the motor 100 can be met without changing the structure of the existing motor, the application range of the product is further expanded, the consumption of strategic resources is reduced, and the motor is suitable for popularization and application.

Specifically, the intrinsic coercive force of the permanent magnet 106 is 1801kA/m, 1805kA/m, 1810kA/m, 1820kA/m, 1829kA/m, and it is understood that the intrinsic coercive force of the permanent magnet may be other values that meet the requirement. For example, the intrinsic coercivity of the permanent magnet may also be greater than 1920 kA/m.

Specifically, the 9-slot 6-pole brushless motor is widely applied to various fields by virtue of the characteristics of small torque fluctuation, stable rotation and the like, and in the motor 100 provided by the invention, when the intrinsic coercive force of the permanent magnet 106 is greater than 1800kA/m, the ratio of the number of the stator convex teeth 104 of the motor 100 to the number of the phases of the windings is set to be less than or equal to 3, so that the performance requirement of the 9-slot 6-pole brushless motor can be met, and the motor 100 provided by the invention is more widely applied.

Specifically, the content of the heavy rare earth element in the permanent magnet 106 has a large influence on the intrinsic coercivity of the permanent magnet 106, and generally, the higher the content of the heavy rare earth element in the permanent magnet 106 is, the larger the intrinsic coercivity of the permanent magnet 106 is, so that the better the performance of the motor 100 is, and the intrinsic coercivity of the permanent magnet 106 containing the heavy rare earth element is generally larger than 1830 kA/m.

Further, the stator core 102 is provided with stator slots and stator teeth 104, each stator slot being disposed between two adjacent stator teeth 104, and the stator assembly further includes coils crossing the stator teeth 104 and being located in the stator slots to form windings, the number of turns of the windings being the number of turns of the coils around the stator teeth 104114.

Further, the number of stator lobes 104 is 6 or 9; the number of phases of the winding is 3.

Specifically, according to the fact that the intrinsic coercivity of the permanent magnet 106 is greater than 1800kA/m, the number of the stator teeth 104 of the motor 100 can be set to 6, and the number of the phases of the windings of the motor 100 is set to 3, so that the performance of the motor 100, in which the intrinsic coercivity of the permanent magnet 106 is greater than 1800kA/m and the ratio of the number of the stator teeth 104 to the number of the phases of the windings is 1, can meet the use requirement.

Further, according to the fact that the intrinsic coercive force of the permanent magnet 106 is greater than 1800kA/m, the number of the stator teeth 104 can be set to 9 or other numbers meeting requirements, and similarly, when the intrinsic coercive force of the permanent magnet 106 is greater than 1800kA/m, the ratio of the number of the stator teeth 104 to the number of phases of the winding is smaller than or equal to 3, so that the use requirements of the motor (for example, a 9-slot 6-pole motor) are met.

Specifically, the number of the stator teeth 104 is 6 or 9, and the number of the phases of the winding is 3, so that the use requirements of different types of motors 100 can be met, and the application range of the product is expanded.

Further, the windings of the motor 100 are concentrated winding sets.

Specifically, under the conditions that the intrinsic coercive force of the permanent magnet 106 is greater than 1800kA/m and the ratio of the number of the stator teeth 104 of the motor 100 to the number of phases of the windings is set to be less than or equal to 3, the windings of the motor 100 are set to be concentrated winding groups, and the length of the end part of each concentrated winding group is smaller, so that the performance of the motor 100 is further improved, the motor 100 can meet the operation requirements of different compressors, and the application range of products is expanded. It will be appreciated that the windings may also be distributed winding.

Example two

As shown in fig. 1, on the basis of the first embodiment, the mass percentage of dysprosium and/or terbium in the permanent magnet is further in a range of 0 to 0.5%, or the mass percentage of heavy rare earth elements in the permanent magnet is in a range of 0 to 0.5%.

In this embodiment, the intrinsic coercivity of the permanent magnet is generally related to the content of the heavy rare earth element in the permanent magnet, and the permanent magnets with intrinsic coercivity greater than 1830kA/m all contain the heavy rare earth element, especially two elements of dysprosium and terbium, and because the heavy rare earth element belongs to the national strategic resource and the cost of the permanent magnet containing the heavy rare earth element is generally high, the motor provided by the present application can select the permanent magnet with the mass percentage of dysprosium and/or terbium in the range of 0 to 0.5%, or select the permanent magnet with the mass percentage of the heavy rare earth element in the range of 0 to 0.5%, only the requirement that the intrinsic coercivity of the permanent magnet is greater than 1800kA/m is satisfied, and simultaneously the ratio of the number of the stator teeth 104 of the motor 100 to the number of the windings is adjusted to be not more than 3, the requirement that the motor 100 can be satisfied, and simultaneously because the heavy rare earth element contained in the permanent magnet 106 is reduced or does not contain the heavy rare earth element, therefore, the production cost of the motor 100 can be greatly reduced, and the cost performance of the motor is improved.

Specifically, the mass percent of dysprosium and/or terbium in the permanent magnet 106 is 0, on one hand, the mass percent of dysprosium in the permanent magnet 106 is 0, namely, the permanent magnet 106 does not contain heavy rare earth element dysprosium, so that the consumption of the permanent magnet 106 on the heavy rare earth element dysprosium is reduced, and the energy is saved; on the other hand, the mass percentage of terbium in the permanent magnet 106 is 0, that is, the permanent magnet 106 does not contain heavy rare earth element terbium, so that the consumption of the permanent magnet 106 on the heavy rare earth element terbium is reduced, and the energy is saved; on the other hand, the sum of the mass percentages of dysprosium and terbium in the permanent magnet 106 is 0, that is, the permanent magnet 106 does not contain heavy rare earth elements of dysprosium and terbium, so that the consumption of the heavy rare earth elements of dysprosium and terbium by the permanent magnet 106 is reduced, the sustainable development of resources is facilitated, energy is saved, the manufacturing cost of the motor 100 is reduced, and the motor is suitable for popularization and application.

It is understood that the mass percent of dysprosium and/or terbium in the permanent magnet 106 can be other values as well, e.g., 0.005%, 0.01%, 0.025%, etc. by mass percent of dysprosium and/or terbium in the permanent magnet 106.

Specifically, the mass percentage of the heavy rare earth element in the permanent magnet 106 is 0, that is, the permanent magnet 106 does not contain the heavy rare earth element, so that the consumption of competitive resources is reduced, the sustainable development of resources is facilitated, the manufacturing cost of the motor 100 is reduced, and the motor is suitable for popularization and application. It is understood that the mass percent of the heavy rare earth element in the permanent magnet 106 can be other values, such as 0.005%, 0.01%, 0.025%, etc. of the heavy rare earth element in the permanent magnet 106. The heavy rare earth elements may also include other elements that may be a component of the permanent magnet 106.

Further, the permanent magnet 106 is an ndfeb permanent magnet, which has excellent magnetic properties and can meet the use requirements of the motor 100, and it can be understood that the permanent magnet 106 may also be another permanent magnet 106 meeting the requirements.

EXAMPLE III

As shown in fig. 1, on the basis of the first or second embodiment, in the motor 100 provided by the present invention, the rotor assembly further includes a rotor core 108, one of the rotor core 108 and the stator core 102 is enclosed outside the other, the rotor core 108 is provided with a mounting groove 110, and the permanent magnet 106 is disposed in the mounting groove 110.

In this embodiment, one of rotor core 108 and stator core 102 of motor 100 is surrounded on the outside of the other, and meanwhile, mounting groove 110 is arranged on rotor core 108, and permanent magnet 106 is arranged in mounting groove 110, so that motor 100 has a more reasonable structure, the service performance of motor 100 is ensured, the volume of motor 100 is reduced, and the practicability of motor 100 is improved.

Specifically, the rotor assembly further includes a rotor core 108, the permanent magnet 106 is disposed in a mounting groove 110 of the rotor core 108 to form a magnetic pole, on one hand, the stator core 102 is enclosed outside the rotor core 108, that is, the stator assembly is located outside the rotor assembly; on the other hand, rotor core 108 encloses the outside of stator core 102, i.e. the rotor subassembly is located the outside of stator module, and the different positions of stator core 102 and rotor core 108 can satisfy the demand of different motor 100 types, makes for different types of motor 100, through adjusting the number of stator convex teeth 104 and the phase number ratio of winding according to the intrinsic coercivity of permanent magnet 106, is favorable to guaranteeing the service performance of motor 100, rationally utilizes heavy rare earth element, reduces the consumption of national strategic type resource, and reduces the manufacturing cost of motor 100.

Further, the ratio range of the inner diameter of the stator core 102 to the outer diameter of the stator core 102 is: 0.57 to 0.6; and/or the number of mounting slots 110 is 4 or 6.

Specifically, as shown in fig. 1, the inner diameter of the stator core is Di1, and the outer diameter of the stator core is D1; through the ratio of the internal diameter of reasonable setting motor 100 stator core 102 and stator core 102's external diameter to can adjust motor 100's performance, and then satisfy the requirement to motor 100 performance under some different special operational environment, when guaranteeing motor 100 working property, further improve motor 100's practicality, specifically, through the ratio of the internal diameter of reasonable setting stator core and stator core's external diameter, be favorable to satisfying the compressor and carry the user demand of effect.

Specifically, the ratio of the inner diameter of stator core 102 to the outer diameter of stator core 102 of electric machine 100 may be 0.57, 0.58, 0.59, or 0.6.

Further, the number of the mounting grooves 110 of the motor 100 is set to be 4 or 6, so that the number of poles of the motor 100 is determined, wherein the number of the mounting grooves is p, and p is 4 or 6, so that the number of poles of the motor is p, that is, the number of poles of the motor is 4 or 6, which is beneficial to expanding the application range of the motor.

Example four

As shown in fig. 1, on the basis of any of the above embodiments, the motor 100 provided by the present invention further includes: a cover provided at an end of rotor core 108; the connecting member, the rotor core 108, is provided with a mounting hole 112, and the connecting member is connected with the mounting hole 112 to connect the cover and the rotor core 108.

In this embodiment, the motor 100 further includes a cover and a connector, the rotor core 108 is provided with a mounting hole 112, and the cover and the rotor core 108 are connected by connecting the connector with the mounting hole 112, so that reliable connection between the rotor core 108 and the cover is achieved, and reliability of the motor 100 is improved.

Specifically, the number of the connecting holes is multiple, the connecting holes are rivet holes, and the connecting pieces are rivets.

Further, the rotor core 108 is further provided with a through hole 114, and the through hole 114 is spaced apart from the mounting hole 112 and the mounting groove 110.

Specifically, the rotor core 108 is provided with a through hole 114, and the through hole 114 is spaced from the mounting hole 112 and the mounting groove 110, so that when the compressor works, the through hole 114 provides a passage for circulation of a cooling medium, thereby ensuring the working reliability of the motor 100 and the working reliability of the compressor.

Further, the number of the through holes 114 is plural, and the plural through holes 114 are favorable for increasing the amount of the refrigerant circulating through the rotor core 108, thereby further ensuring the performance of the motor 100.

EXAMPLE five

According to a second aspect of the present invention, there is provided a compressor comprising: a housing, and a motor 100 as in any of the above embodiments, the motor 100 being disposed within the housing. Since the compressor includes the motor 100 according to any of the above technical solutions, all the advantages of the motor 100 are achieved, and are not described herein again.

EXAMPLE six

According to a third aspect of the present invention, there is provided a refrigeration apparatus comprising: the electric machine 100 according to any of the above embodiments; or the compressor of the above embodiment.

The invention provides a refrigeration device, which comprises the motor 100 in any one of the above embodiments; or the compressor of the above embodiment, and thus has all the advantages of the motor 100 or the compressor, which will not be described herein again.

Furthermore, the refrigeration equipment also comprises a pipeline, the pipeline is communicated with the compressor, and the refrigerant forms a circulation loop through the pipeline and the compressor so as to realize heat exchange refrigeration. Specifically, the refrigeration equipment is an air conditioner, and the air conditioner is a household air conditioner.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

As shown in fig. 1, the present invention provides a motor 100 including: rotor core 108, permanent magnets 106, stator core 102, and windings. Rotor core 108 has a plurality of mounting slots 110, and permanent magnet 106 is neodymium iron boron permanent magnet, and neodymium iron boron permanent magnet is placed in mounting slot 110 that rotor core 108 has. The stator core 102 is provided with a plurality of stator convex teeth 104 and stator slot gaps, the number of the stator convex teeth 104 is Q, the stator convex teeth 104 are uniformly distributed along the circumferential direction, stator windings are distributed on the stator convex teeth 104, the stator windings adopt concentrated winding, and the number of the stator windings is m.

At present, in a compressor used in a variable frequency household air conditioner, a magnet adopted by a variable frequency motor of the variable frequency household air conditioner is usually an Nd-Fe-B permanent magnet, the permanent magnet contains heavy rare earth elements of dysprosium and terbium, and the intrinsic coercive force of the permanent magnet at 20 ℃ is equal to or more than 1830 kA/m. The heavy rare earth elements belong to non-renewable national important strategic resources and scarce resources. In order to reduce the dependence of the existing product on the heavy rare earth element of the key material resource, particularly the dependence on the heavy rare earth elements dysprosium and terbium, enrich the product types, reduce the cost of the compressor and improve the product competitiveness, the permanent magnet without the heavy rare earth neodymium-iron-boron or the permanent magnet with less heavy rare earth elements in percentage by mass is provided.

Further, the permanent magnet 106 of the motor 100 improved by the present application is the permanent magnet 106 without heavy rare earth elements, that is, the mass percentage of the heavy rare earth elements in the permanent magnet 106 is 0, when the intrinsic coercive force of the permanent magnet without heavy rare earth neodymium iron boron at 20 ℃ is greater than 1800kA/m, and the ratio Q/m of the number Q of the stator teeth 104 to the phase number m of the winding is less than or equal to 3, the service performance of the motor 100 matched with the slot pole of 9 slots and 6 poles in the prior art can be satisfied, and further when the service performance of the motor 100 can meet the use requirement of the compressor, the use of national important strategic resources is reduced, the manufacturing cost of the motor 100 is reduced, the use of the national important strategic resources is greatly reduced, the dependence of the product on the heavy rare earth elements is reduced, the applicability of the product is improved, the product competitiveness is improved, and the motor is suitable for popularization and application.

Further, when the number Q of the stator teeth is equal to 9, and the number m of the phases of the winding of the motor is equal to 3, the intrinsic coercive force of the permanent magnet 106 is greater than 1920 kA/m.

Further, the inner diameter of stator core 102 is Di1, the outer diameter of stator core 102 is D1, and the inner diameter and the outer diameter of stator core 102 satisfy: di1/D1 is more than or equal to 0.57 and less than or equal to 0.6.

Further, rotor core 108 is located inside stator core 102, and rotor core 108 coincides with the central axis of stator core 102.

Further, the motor 100 further includes a cover, the rotor core 108 has a mounting hole 112 and a through hole 114, the mounting hole 112 is used for rivet connection of the cover and the rotor core 108; the through hole 114 is used for the circulation of the refrigerant inside the motor 100.

In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically defined, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the drawings, and are used only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. 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 of the present invention, 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 present invention. In the present invention, 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 is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to 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. An electric machine, comprising:

the stator assembly comprises a stator core and a winding, the stator core is provided with a plurality of stator convex teeth, and the winding is wound on the plurality of stator convex teeth;

a rotor assembly including permanent magnets;

wherein the intrinsic coercivity of the permanent magnet is configured to be suitable for adjusting the number of stator lobes to the phase ratio of the windings;

the intrinsic coercive force of the permanent magnet is more than 1800 kA/m;

and the ratio of the number of the stator convex teeth to the number of the phases of the windings is less than or equal to 3.

2. The electric machine of claim 1,

the number of the stator convex teeth is 6 or 9;

the number of phases of the winding is 3.

3. The machine according to claim 1 or 2,

the mass percent of dysprosium and/or terbium in the permanent magnet ranges from 0 to 0.5%.

4. The machine according to claim 1 or 2,

the mass percentage of the heavy rare earth elements in the permanent magnet ranges from 0 to 0.5 percent.

5. The machine according to claim 1 or 2,

the winding is a concentrated winding.

6. The machine according to claim 1 or 2,

the rotor subassembly still includes rotor core, rotor core with one of stator core encloses the outside of locating another, rotor core is provided with the mounting groove, the permanent magnet set up in the mounting groove.

7. The electric machine of claim 6,

the ratio range of the inner diameter of the stator core to the outer diameter of the stator core is as follows: 0.57 to 0.6; and/or

The number of the mounting grooves is 4 or 6.

8. The electric machine of claim 6, further comprising:

the cover body is arranged at the end part of the rotor iron core;

the rotor core is provided with a mounting hole, and the connecting piece is connected with the mounting hole so as to connect the cover body and the rotor core.

9. The electric machine of claim 8,

the rotor core is further provided with a through hole, and the through hole is arranged at an interval with the mounting hole and the mounting groove.

10. A compressor, comprising:

a housing, and

an electric machine as claimed in any one of claims 1 to 9, which is provided inside the housing.

11. A refrigeration apparatus, comprising:

the electric machine of any one of claims 1 to 9; or

The compressor of claim 10.