CN213521442U

CN213521442U - Rotor, permanent magnet synchronous motor, compressor and refrigeration equipment

Info

Publication number: CN213521442U
Application number: CN202022842205.8U
Authority: CN
Inventors: 徐飞; 邱小华; 江波
Original assignee: Anhui Meizhi Precision Manufacturing Co Ltd
Current assignee: Anhui Meizhi Precision Manufacturing Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-06-22
Anticipated expiration: 2030-11-30

Abstract

The utility model provides a rotor, a permanent magnet synchronous motor, a compressor and a refrigeration device, wherein the rotor comprises a rotor core, magnet slots are arranged on the rotor core, and a plurality of magnet slots are distributed along the circumferential direction of the rotor core; the permanent magnets are arranged in the magnet slots to form magnetic poles, and each permanent magnet comprises a first permanent magnet and a second permanent magnet; the magnetic flux guiding grooves are arranged on the rotor core, the magnetic flux guiding grooves are located on one side, away from the rotation axis of the rotor, of the magnet slot, and at least one of the magnetic flux guiding grooves is communicated with the magnet slot. The utility model provides a rotor, magnetic flow guide way are located one side that the magnet slot deviates from the rotation center of rotor, have at least one and magnet slot intercommunication among a plurality of magnetic flow guide ways to be favorable to restraining the even harmonic in armature magnetic field, showing and reducing armature magnetic field harmonic and the produced radial electromagnetic wave of rotor magnetic field harmonic looks, and then improve the vibration noise of compressor key frequency channel, effectively improve the compressor listening sensation.

Description

Rotor, permanent magnet synchronous motor, compressor and refrigeration equipment

Technical Field

The utility model relates to a compressor technical field particularly, relates to a rotor, a PMSM, a compressor and refrigeration plant.

Background

In a rotary direct-current variable-frequency compressor adopting a motor in the related art, the motor generally adopts a built-in permanent magnet motor, and in recent years, along with the improvement of the power density of the motor, higher requirements are provided for the vibration noise of the motor, while the conventional motor cannot meet the requirement of silence more and more.

SUMMERY OF THE UTILITY MODEL

The present invention aims at least solving one of the technical problems existing in the prior art or the related art.

To this end, a first aspect of the present invention provides a rotor.

The second aspect of the utility model also provides a permanent magnet synchronous motor.

The third aspect of the present invention also provides a compressor.

The fourth aspect of the present invention also provides a refrigeration apparatus.

In view of this, the embodiment of the first aspect of the present invention provides a rotor for an electric machine, the electric machine includes a stator, the rotor is rotatably disposed in the stator, and the rotor includes: a rotor core; the magnet slots are arranged on the rotor core, and a plurality of magnet slots are distributed along the circumferential direction of the rotor core; the permanent magnets are arranged in the magnet slots to form magnetic poles, and each permanent magnet comprises a first permanent magnet and a second permanent magnet; the magnetic flux guiding grooves are arranged on the rotor core, the magnetic flux guiding grooves are located on one side, away from the rotation axis of the rotor, of the magnet slot, and at least one of the magnetic flux guiding grooves is communicated with the magnet slot.

The embodiment of the utility model provides a rotor for the motor, the motor includes the stator, the rotor can set up in the stator rotatably, the rotor includes rotor core, rotor core is provided with a plurality of magnet slots, a plurality of magnet slots distribute along rotor core's circumference; the permanent magnets are arranged in the magnet slots to form magnetic poles, and each permanent magnet comprises a first permanent magnet and a second permanent magnet; a plurality of magnetic flux guide slots, set up on rotor core, a plurality of magnetic flux guide slots are located the one side that the magnet slot deviates from the rotation center of rotor, have at least one and magnet slot intercommunication in a plurality of magnetic flux guide slots. The embodiment of the utility model provides a rotor, including rotor core and a plurality of magnetic flux guide ways of setting on rotor core, be provided with a plurality of magnet slots on the rotor core, specifically, the magnet slot is used for installing the permanent magnet in order to form the magnetic pole, the magnetic pole that the permanent magnet in the adjacent magnet slot formed is opposite, on rotor core, the magnetic flux guide way is located one side that the magnet slot deviates from the rotation center of rotor, and, have at least one and magnet slot intercommunication among a plurality of magnetic flux guide ways, thereby be favorable to restraining the even harmonic in armature magnetic field, show and reduce the radial electromagnetic force ripples that armature magnetic field harmonic and rotor magnetic field harmonic acted on produced, and then improve the vibration noise of compressor key frequency channel, effectively improve the compressor auditory sensation.

In addition, the number of the magnetic flux guide grooves influences the suppression effect on the stator armature magnetic field, generally, the more the number of the magnetic flux guide grooves is, the better the suppression effect on the stator armature magnetic field is, but the more the number of the magnetic flux guide grooves can reduce the counter electromotive force, and simultaneously the manufacturing difficulty is increased, therefore, in a specific embodiment of the utility model, the number of the magnetic flux guide grooves is set to be 4, the problems that the structural strength of the rotor core is reduced, the magnetic flux is reduced, and the cogging torque is increased due to the excessive number of the magnetic flux guide grooves in the related technology are avoided, and the problem that the radial force of the motor cannot be effectively improved due to the less number of the magnetic flux guide grooves is avoided, and by setting the number of the magnetic flux guide grooves in a reasonable range, the good noise reduction effect and the counter electromotive force effect of the motor can be effectively ensured under the condition that, the cost performance of the motor is improved.

Specifically, the first permanent magnet and the second permanent magnet are identical in magnetism, size, and material.

According to the utility model provides an above-mentioned rotor can also have following additional technical characterstic:

in one possible design, the rotor core includes: the first rotor punching sheet is provided with a part of the plurality of magnetic flux guide grooves; and part of the plurality of magnetic flux guide grooves is arranged on the second rotor punching sheet, and the first rotor punching sheet and the second rotor punching sheet are stacked along the rotation axis direction of the rotor.

In the design, the rotor core comprises a first rotor punching sheet and a second rotor punching sheet, the first rotor punching sheet and the second rotor punching sheet are arranged in a stacked mode along the rotation axis direction of a rotor to form the rotor core, and a plurality of magnetic flux guide grooves and magnet slots are formed in the first rotor punching sheet and the second rotor punching sheet.

In one possible design, the plurality of flux guide slots includes: the first magnetic flux guide groove is arranged on the first rotor punching sheet and is not communicated with the magnet slot; and the second magnetic flux guide grooves are arranged on the second rotor punching sheet, and at least one of the second magnetic flux guide grooves is communicated with the magnet slot.

In the design, the plurality of magnetic flux guide grooves are specifically defined to comprise a first magnetic flux guide groove and a second magnetic flux guide groove, wherein the first magnetic flux guide groove is arranged on the first rotor punching sheet, and the first magnetic flux guide groove is not communicated with the magnet slot; that is, the magnetic flux guide groove on the first rotor punching sheet is the first magnetic flux guide groove, and the first magnetic flux guide groove on the first rotor punching sheet is not communicated with the magnet slot, so that the first rotor punching sheet is favorably ensured to have higher structural strength; the second magnetic flux guide grooves are formed in the second rotor punching sheet, and at least one of the second magnetic flux guide grooves is communicated with the magnet slot; that is, the magnetic flux guide groove on the second rotor punching is the second magnetic flux guide groove, and at least one of the second magnetic flux guide grooves on the second rotor punching is communicated with the magnet slot, so that the suppression of even harmonics of an armature magnetic field is facilitated, radial electromagnetic waves generated by the interaction of the armature magnetic field harmonics and the rotor magnetic field harmonics are remarkably reduced, vibration noise of a key frequency range of the compressor is improved, and the hearing of the compressor is effectively improved. Because first rotor punching and second rotor punching pile up and form rotor core, through setting up the magnetic flux guide way that forms on some rotor punching (first rotor punching) of rotor core and magnet slot not communicate, thereby make some rotor punching that form rotor core structural strength high, the structural strength of rotor core has been guaranteed, can enough ensure rotor core's life, can realize restraining the even harmonic of armature magnetic field through the change to the magnetic flux guide way again, show to reduce the radial electromagnetic force wave that armature magnetic field harmonic and rotor magnetic field harmonic acted on mutually and produced, and then improve the vibration noise of compressor key frequency channel, effectively improve the compressor auditory sensation. Adopt first rotor punching and second rotor punching structure simultaneously to be favorable to improving the low frequency efficiency of motor when improving motor low frequency vibration noise, compromise and improve volume production manufacturability.

In one possible design, the second flux guide groove includes: and any one group of sub magnetic flux guide grooves are arranged in the area corresponding to one magnet slot, two sub magnetic flux guide grooves positioned at the edge in any one group of sub magnetic flux guide grooves are communicated with the magnet slot, and the rest sub magnetic flux guide grooves in any one group of sub magnetic flux guide grooves are not communicated with the magnet slot.

In this design, it is specifically described that the second magnetic flux guide slot includes a plurality of sets of sub magnetic flux guide slots, a set of sub magnetic flux guide slots is provided in a region corresponding to any one of the magnet slots, two sub magnetic flux guide slots located at the edge of any one set of sub magnetic flux guide slots are communicated with the magnet slot, and the rest sub magnetic flux guide slots (i.e., located at the middle) of any one set of sub magnetic flux guide slots are not communicated with the magnet slot. Through setting up some and magnet slot and being linked together in every group's sub magnetic flux guide way, another part and magnet slot do not communicate, can enough guarantee the structural strength of second rotor punching, can realize restraining the even harmonic of armature magnetic field again through the change to some sub magnetic flux guide ways, show to reduce the radial electromagnetic force wave that armature magnetic field harmonic and rotor magnetic field harmonic produced mutually, and then improve the vibration noise of compressor key frequency channel, effectively improve compressor hearing.

In one possible design, the second flux guide groove includes: and any one group of sub magnetic flux guide grooves are arranged in the area corresponding to one magnet slot, two sub magnetic flux guide grooves positioned at the edge in any one group of sub magnetic flux guide grooves are not communicated with the magnet slot, and the rest sub magnetic flux guide grooves in any one group of sub magnetic flux guide grooves are communicated with the magnet slot.

In this design, it is specifically described that the second magnetic flux guide groove includes a plurality of sets of sub magnetic flux guide grooves, a set of sub magnetic flux guide grooves is provided in a region corresponding to any one of the magnet slots, two sub magnetic flux guide grooves located at the edge of any one set of sub magnetic flux guide grooves are not communicated with the magnet slot, and the remaining sub magnetic flux guide grooves (i.e., located at the middle) of any one set of sub magnetic flux guide grooves are communicated with the magnet slot. Through setting up some and magnet slot and being linked together in every group's sub magnetic flux guide way, another part and magnet slot do not communicate, can enough guarantee the structural strength of second rotor punching, can realize restraining the even harmonic of armature magnetic field again through the change to some sub magnetic flux guide ways, show to reduce the radial electromagnetic force wave that armature magnetic field harmonic and rotor magnetic field harmonic produced mutually, and then improve the vibration noise of compressor key frequency channel, effectively improve compressor hearing.

In one possible design, the second flux guide groove includes: and any one group of sub-magnetic flux guide grooves are arranged in the area corresponding to one magnet slot, and all the sub-magnetic flux guide grooves are communicated with the magnet slot.

In this design, it is specifically described that the second magnetic flux guide groove includes a plurality of sets of sub magnetic flux guide grooves, a set of sub magnetic flux guide grooves is provided in a region corresponding to any one of the magnet slots, and all of the sub magnetic flux guide grooves of any one set are communicated with the magnet slots. The more the quantity of this kind of second rotor punching, the better is improved effect to the motor low frequency noise, but rotor core's structural mechanical strength can worsen. By arranging that all the sub-magnetic flux guide grooves of each group are communicated with the magnet slot, the even harmonic of the armature magnetic field is further suppressed, the radial electromagnetic wave generated by the interaction of the armature magnetic field harmonic and the rotor magnetic field harmonic is remarkably reduced, the vibration noise of the key frequency band of the compressor is improved, and the hearing of the compressor is effectively improved.

In one possible design, the second flux guide groove includes: and any one of the sub-magnetic flux guide grooves is communicated with the magnet slot.

In this design, it is specifically described that the second magnetic flux guide slot includes a plurality of groups of sub magnetic flux guide slots, a group of sub magnetic flux guide slots is provided in an area corresponding to any one of the magnet slots, any one of the sub magnetic flux guide slots in any one group of sub magnetic flux guide slots is communicated with the magnet slot, any one of the sub magnetic flux guide slots in each group of sub magnetic flux guide slots is communicated with the magnet slot, and the rest sub magnetic flux guide slots are not communicated with the magnet slot, so that the structural strength of the second rotor sheet can be further ensured, and the service life of the rotor core is prolonged.

In one possible design, the second rotor punching sheet is clamped between the first rotor punching sheets; or the first rotor punching sheet is clamped between the second rotor punching sheets; or the first rotor punching sheet is positioned above the second rotor punching sheet; or the first rotor punching sheet is positioned below the second rotor punching sheet; or the first rotor punching sheet and the second rotor punching sheet are alternately stacked.

In the design, several arrangement structures of the first rotor punching sheet and the second rotor punching sheet are specifically described. Specifically, the second rotor punching sheets stacked to a certain thickness are clamped between two groups of first rotor punching sheets stacked to a certain thickness; or the first rotor punching sheets stacked to a certain thickness are clamped between the two groups of second rotor punching sheets stacked to a certain thickness; or the first rotor punching sheets stacked to a certain thickness are positioned above the second rotor punching sheets stacked to a certain thickness, that is, the group of first rotor punching sheets are stacked above the group of second rotor punching sheets to form the rotor core, so that the processing technology of the rotor core is simplified, and the production efficiency is improved; or the first rotor punching sheets stacked to a certain thickness are positioned below the second rotor punching sheets stacked to a certain thickness, that is, a group of first rotor punching sheets are stacked below a group of second rotor punching sheets to form a rotor core, so that the processing technology of the rotor core is simplified, and the production efficiency is improved; or the first rotor punching sheet and the second rotor punching sheet are alternately stacked, and the first rotor punching sheet and the second rotor punching sheet are alternately stacked, so that the punching sheets communicated with the magnetic flux guide groove and the magnet slot are more uniformly distributed in the height direction of the rotor core, the even harmonic of the armature magnetic field is suppressed, the effect of radial electromagnetic force waves generated by the interaction of the armature magnetic field harmonic and the rotor magnetic field harmonic is remarkably reduced, the vibration noise of the key frequency range of the compressor is improved, and the hearing of the compressor is effectively improved.

In one possible design, in a cross section perpendicular to the rotation axis of the rotor, one end in the longitudinal direction of the magnetic flux guide groove is close to the magnet insertion groove, and the other end in the longitudinal direction of the magnetic flux guide groove extends toward a direction away from the magnet insertion groove.

In the design, the extending direction of the length of the magnetic flux guide groove is specifically limited, specifically, in a section perpendicular to the rotation axis of the rotor, one end of the magnetic flux guide groove in the length direction is close to the magnet slot, and the other end of the magnetic flux guide groove in the length direction extends towards the direction departing from the magnet slot. Moreover, the structure is convenient to realize the communication between the magnetic flux guide groove and the magnet slot, the performance of the motor is improved, and meanwhile, the even harmonic of the armature magnetic field can be restrained, the radial electromagnetic wave generated by the interaction of the armature magnetic field harmonic and the rotor magnetic field harmonic is obviously reduced, so that the vibration noise of the key frequency band of the compressor is improved, and the hearing of the compressor is effectively improved.

In one possible design, the magnet slots comprise two sub slots, the two sub slots are arranged along the circumferential direction of the rotor core, and the first permanent magnet and the second permanent magnet are respectively arranged in the two sub slots to form magnetic poles; in any magnet slot, a first included angle is formed between the two sub slots.

In this design, the permanent magnet includes first permanent magnet and second permanent magnet, the magnetic field intensity of first permanent magnet and second permanent magnet can be the same, also can be different, the magnet slot includes two sub-slots, two sub-slots set up along rotor core's circumferential direction, first permanent magnet and second permanent magnet set up respectively in two different sub-slots, wherein, in arbitrary magnet slot, first contained angle has between two sub-slots, also nonparallel between first permanent magnet and the second permanent magnet, and then can improve synthetic air gap magnetic field waveform, reduce the vibration noise of motor, promote the well low frequency efficiency of compressor.

In one possible design, in any one magnet slot, the two sub-slots are communicated, and a clamping convex point is arranged at the connecting point of the two sub-slots and protrudes towards the inside of the magnet slot.

In the design, two sub-slots in any one magnet slot are communicated, in addition, the connecting points of the two sub-slots are provided with clamping convex points which are convex towards the magnet slots, and the positions of the permanent magnets are limited through the clamping convex points between the connecting points of the two sub-slots, so that the load magnetic density of the motor is improved, the air gap magnetic density waveform of the motor is optimized, the radial force of the motor is further improved, and the noise of the motor is reduced.

According to the utility model discloses a second aspect has still provided a permanent magnet synchronous motor, include: the rotor provided by any one of the technical solutions.

The utility model discloses the permanent magnet synchronous motor that the second aspect provided, because of the rotor that proposes including above-mentioned arbitrary technical scheme, consequently have all beneficial effects of rotor, no longer give consideration to here.

In one possible design, the permanent magnet synchronous machine further includes: the stator comprises a stator core and tooth parts arranged along the circumferential direction of the stator core, and the rotor is rotatably arranged in the stator.

In this design, the stator includes stator core and tooth, prescribes a limit to the stator slot between the adjacent tooth, winds on the tooth and is equipped with the coil, and the stator core encloses to be located the rotor outside, and the rotor rotationally is located the stator for rotor and stator cooperate better.

In one possible design, the inner diameter of the stator core is Di, the rated torque of the permanent magnet synchronous motor is T, and the unit volume torque of the rotor is TPV, and the following relation is satisfied: 5.18X 10^-7≤T×Di^-3×TPV^-1≤1.17×10^-6，5kN·m·m^-3≤TPV≤45kN·m·m^-3(ii) a Wherein the rated torque T of the permanent magnet synchronous motor is expressed in the unit of N.m, the inner diameter Di of the stator core is expressed in the unit of mm, and the unit volume torque TPV of the rotor is expressed in the unit of kN.m.m^-3。

In the design, the rated torque of the permanent magnet synchronous motor is T, the inner diameter of a stator core is Di, the unit volume torque of a rotor is TPV, and the requirements of 5.18 multiplied by 10 are met^-7≤T×Di^-3×TPV^-1≤1.17×10^-6The value range of the unit volume torque TPV is 5 kN.m.m^-3≤TPV≤45kN·m·m^-3The numerical range of the combined variable of the rated torque T of the permanent magnet synchronous motor, the inner diameter Di of the stator core and the unit volume torque TPV of the rotor is limited, so that the permanent magnet synchronous motor can meet the power requirement of the compressor, and in addition, the permanent magnet synchronous motor and the compressor adopting the rotor can effectively reduce the magnetic leakage of the rotor, increase the utilization rate of the permanent magnet and improve the efficiency of the permanent magnet synchronous motor.

According to the utility model discloses a third aspect still provides a compressor, include: a rotor according to any of the above aspects; or the permanent magnet synchronous motor according to any of the above-mentioned second aspects.

The third aspect of the present invention provides a compressor, comprising a rotor according to any one of the above-mentioned first aspect; or the permanent magnet synchronous motor proposed in any technical scheme of the second aspect, so that the permanent magnet synchronous motor has all the beneficial effects of a rotor or a permanent magnet synchronous motor, and the description is omitted.

Further, the compressor includes casing and the pump body, and the casing forms and holds the chamber, and the pump body and permanent magnet synchronous machine set up in holding the chamber, and the operation of permanent magnet synchronous machine can drive the work of the pump body, realizes the compression exhaust function of compressor.

Further, the pump body includes: the crankshaft is arranged in the rotor core of the rotor in a penetrating mode and is connected with the rotor core; a power section coupled to the shaft and operatively configured to drive the shaft for rotation. The compressor further comprises a crankshaft and a power portion, the crankshaft penetrates through the rotor core of the rotor, the crankshaft is connected with the rotor core and the power portion, and then the crankshaft can be driven to rotate when the power portion works so as to drive the rotor core to rotate. Specifically, a crankshaft of the compressor is connected with the rotor core through a shaft hole of the rotor core.

Specifically, the compressor further comprises a main bearing, an auxiliary bearing, a cylinder and a piston, wherein one end of the crankshaft penetrates through the rotor, and the other end of the crankshaft penetrates through the main bearing, the cylinder and the auxiliary bearing in sequence.

According to the utility model discloses a fourth aspect still provides a refrigeration plant, include: a rotor according to any of the above aspects; or the permanent magnet synchronous motor provided by any technical scheme of the second aspect; or a compressor as set forth in any of the above-mentioned third aspects.

The refrigeration equipment provided by the fourth aspect of the present invention includes the rotor provided by any one of the above technical solutions of the first aspect; or the permanent magnet synchronous motor provided by any technical scheme of the second aspect; or the compressor proposed in any of the above third technical solutions, so that the compressor has all the advantages of a rotor or a permanent magnet synchronous motor or a compressor, and will not be described herein again.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, 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 second rotor sheet of a rotor according to an embodiment of the present invention;

fig. 2 shows a schematic structural view of a second rotor sheet of a rotor according to another embodiment of the present invention;

fig. 3 shows a schematic structural view of a second rotor sheet of a rotor according to yet another embodiment of the present invention;

fig. 4 shows a schematic structural view of a second rotor sheet of a rotor according to yet another embodiment of the present invention;

fig. 5 shows a schematic structural view of a first rotor sheet of a rotor according to an embodiment of the present invention;

fig. 6 shows a schematic structural view of a rotor according to an embodiment of the present invention;

fig. 7 shows a schematic structural diagram of a compressor according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 7 is:

100, 102, 110, 112, 114, 115, 116, 117, 118, 120, 200, 210, 220, 230, 240, 250, 260, 270, housing.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. 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.

A rotor 100, a permanent magnet synchronous motor, a compressor 200, and a refrigeration apparatus according to some embodiments of the present invention are described below with reference to fig. 1 to 7.

Example one

As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, an embodiment of the first aspect of the present invention provides a rotor 100, the rotor 100 is used for an electric machine, the electric machine includes a stator 210, the rotor 100 is rotatably disposed in the stator 210, the rotor 100 includes: a rotor core 110; a plurality of magnet slots 112 disposed on the rotor core 110, the plurality of magnet slots 112 being distributed along a circumferential direction of the rotor core 110; permanent magnets 120 disposed in the magnet slots 112 to form magnetic poles, the permanent magnets 120 including a first permanent magnet and a second permanent magnet, a sidewall of the first permanent magnet facing away from the rotation axis of the rotor 100 and an extension line of a sidewall of the second permanent magnet facing away from the rotation axis of the rotor 100 do not coincide and intersect at a point; and a plurality of flux guide grooves provided on the rotor core 110, the plurality of flux guide grooves being located at a side of the magnet insertion groove 112 facing away from the rotation axis of the rotor 100, at least one of the plurality of flux guide grooves communicating with the magnet insertion groove 112.

The embodiment of the utility model provides a rotor 100 for the motor, the motor includes stator 210, rotor 100 can set up in stator 210 with rotating, rotor 100 includes rotor core 110, rotor core 110 is provided with a plurality of magnet slots 112, a plurality of magnet slots 112 along rotor core 110's circumference distribution; permanent magnets 120 disposed in the magnet slots 112 to form magnetic poles, the permanent magnets 120 including first and second permanent magnets; and a plurality of magnetic flux guide grooves provided on the rotor core 110, the plurality of magnetic flux guide grooves being located on a side of the magnet insertion groove 112 away from the rotation center 102 of the rotor, at least one of the plurality of magnetic flux guide grooves being communicated with the magnet insertion groove 112. The embodiment of the utility model provides a rotor 100, including rotor core 110 and a plurality of magnetic flux guide ways of setting on rotor core 110, be provided with a plurality of magnet slots 112 on rotor core 110, specifically, magnet slot 112 is used for installing permanent magnet 120 in order to form the magnetic pole, the magnetic pole that permanent magnet 120 in the adjacent magnet slot 112 formed is opposite, on rotor core 110, the magnetic flux guide way is located one side that magnet slot 112 deviates from the rotation center 102 of rotor, and, at least one communicates with magnet slot 112 in a plurality of magnetic flux guide ways, thereby be favorable to restraining the even harmonic in armature magnetic field, show and reduce the radial electromagnetic force ripples that armature magnetic field harmonic and rotor 100 magnetic field harmonic acted on and produced, and then improve the vibration noise of compressor 200 key frequency channel, effectively improve compressor 200 auditory sensation.

In addition, the number of the magnetic flux guide slots affects the suppression effect of the armature magnetic field of the stator 210, generally, the more the number of the magnetic flux guide slots is, the better the suppression effect of the armature magnetic field of the stator 210 is, but the more the number of the magnetic flux guide slots can reduce the counter electromotive force, and at the same time, the manufacturing difficulty is increased, therefore, in a specific embodiment of the invention, the number of the magnetic flux guide slots is set to be 4, thereby avoiding the problems that the structural strength of the rotor core 110 is reduced, the magnetic flux is reduced, and the cogging torque is increased due to the excessive number of the magnetic flux guide slots in the related art, and simultaneously avoiding the problem that the radial force of the motor cannot be effectively improved due to the small number of the magnetic flux guide slots, and by setting the number of the magnetic flux guide slots in a reasonable range, the good noise reduction effect and the counter electromotive force effect of the motor can be, the cost performance of the motor is improved.

In a specific embodiment of the present invention, the first permanent magnet and the second permanent magnet are identical in magnetism, size and material.

Example two

On the basis of the first embodiment, the second embodiment provides a rotor 100, wherein the rotor core 110 includes: a first rotor lamination 114, a part of the plurality of magnetic flux guide grooves being disposed on the first rotor lamination 114; and part of the plurality of flux guide grooves is formed in the second rotor punching sheet 116, and the first rotor punching sheet 114 and the second rotor punching sheet 116 are stacked along the rotation axis direction of the rotor 100.

In this embodiment, the rotor core 110 includes a first rotor punching sheet 114 and a second rotor punching sheet 116, the first rotor punching sheet 114 and the second rotor punching sheet 116 are stacked in a rotation axis direction of the rotor 100 to form the rotor core 110, and a plurality of flux guide slots and magnet insertion slots 112 are disposed on each of the first rotor punching sheet 114 and the second rotor punching sheet 116. The embodiment of the utility model provides a rotor 100 for the motor, the motor includes stator 210, rotor 100 can set up in stator 210 with rotating, rotor 100 includes rotor core 110, rotor core 110 is provided with a plurality of magnet slots 112, a plurality of magnet slots 112 along rotor core 110's circumference distribution; permanent magnets 120 disposed in the magnet slots 112 to form magnetic poles, the permanent magnets 120 including first and second permanent magnets; and a plurality of magnetic flux guide grooves provided on the rotor core 110, the plurality of magnetic flux guide grooves being located on a side of the magnet insertion groove 112 away from the rotation center 102 of the rotor, at least one of the plurality of magnetic flux guide grooves being communicated with the magnet insertion groove 112. The embodiment of the utility model provides a rotor 100, including rotor core 110 and a plurality of magnetic flux guide ways of setting on rotor core 110, be provided with a plurality of magnet slots 112 on rotor core 110, specifically, magnet slot 112 is used for installing permanent magnet 120 in order to form the magnetic pole, the magnetic pole that permanent magnet 120 in the adjacent magnet slot 112 formed is opposite, on rotor core 110, the magnetic flux guide way is located one side that magnet slot 112 deviates from the rotation center 102 of rotor, and, at least one communicates with magnet slot 112 in a plurality of magnetic flux guide ways, thereby be favorable to restraining the even harmonic in armature magnetic field, show and reduce the radial electromagnetic force ripples that armature magnetic field harmonic and rotor 100 magnetic field harmonic acted on and produced, and then improve the vibration noise of compressor 200 key frequency channel, effectively improve compressor 200 auditory sensation.

In any of the above embodiments, the plurality of flux guide slots includes: the first magnetic flux guide groove 115 is arranged on the first rotor punching sheet 114, and the first magnetic flux guide groove 115 is not communicated with the magnet slot 112; and the second magnetic flux guide grooves 117 are formed in the second rotor punching sheet 116, and at least one of the second magnetic flux guide grooves 117 is communicated with the magnet slot 112.

In this embodiment, it is specifically defined that the plurality of flux guide grooves include a first flux guide groove 115 and a second flux guide groove 117, where the first flux guide groove 115 is disposed on the first rotor punching sheet 114, and the first flux guide groove 115 is not communicated with the magnet insertion groove 112; that is, the magnetic flux guide groove on the first rotor punching sheet 114 is the first magnetic flux guide groove 115, and the first magnetic flux guide groove 115 on the first rotor punching sheet 114 is not communicated with the magnet slot 112, which is beneficial to ensuring that the first rotor punching sheet 114 has higher structural strength; the second magnetic flux guide grooves 117 are formed in the second rotor punching sheet 116, and at least one of the second magnetic flux guide grooves 117 is communicated with the magnet slot 112; that is, the magnetic flux guide groove on the second rotor sheet 116 is the second magnetic flux guide groove 117, and at least one of the second magnetic flux guide grooves 117 on the second rotor sheet 116 is communicated with the magnet slot 112, so that the suppression of even harmonics of the armature magnetic field is facilitated, the radial electromagnetic force wave generated by the interaction of the armature magnetic field harmonics and the rotor 100 magnetic field harmonics is remarkably reduced, the vibration noise of the compressor 200 in the key frequency band is further improved, and the hearing sense of the compressor 200 is effectively improved. Because the first rotor punching sheet 114 and the second rotor punching sheet 116 are stacked to form the rotor core 110, the magnetic flux guide groove on a part of the rotor 100 punching sheets (the first rotor punching sheet 114) forming the rotor core 110 is not communicated with the magnet slot 112, so that the structural strength of the part of the rotor 100 punching sheets forming the rotor core 110 is high, the structural strength of the rotor core 110 is ensured, the service life of the rotor core 110 can be ensured, even harmonics of an armature magnetic field can be restrained by changing the magnetic flux guide groove, radial electromagnetic force waves generated by the interaction of the armature magnetic field harmonics and the rotor 100 magnetic field harmonics are remarkably reduced, vibration noise of a key frequency range of the compressor 200 is further improved, and the hearing of the compressor 200 is effectively improved. The structure of the first rotor punching sheet 114 and the second rotor punching sheet 116 is adopted to improve the low-frequency vibration noise of the motor and the low-frequency energy efficiency of the motor, and the manufacturability of mass production is improved.

As shown in fig. 1, in an embodiment of the present invention, the second magnetic flux guiding groove 117 includes: any one group of sub magnetic flux guide grooves is arranged in the area corresponding to one magnet slot 112, two sub magnetic flux guide grooves positioned at the edge in any one group of sub magnetic flux guide grooves are communicated with the magnet slot 112, and the rest sub magnetic flux guide grooves in any one group of sub magnetic flux guide grooves are not communicated with the magnet slot 112.

In this embodiment, it is specifically described that the second magnetic flux guide slot 117 includes a plurality of sets of sub magnetic flux guide slots, a set of sub magnetic flux guide slots is disposed in a region corresponding to any one of the magnet slots 112, two sub magnetic flux guide slots located at the edge of any one set of sub magnetic flux guide slots are communicated with the magnet slot 112, and the remaining sub magnetic flux guide slots located at the middle of any one set of sub magnetic flux guide slots are not communicated with the magnet slot 112. By arranging that one part of each group of sub-flux guide grooves is communicated with the magnet slot 112 and the other part of each group of sub-flux guide grooves is not communicated with the magnet slot 112, the structural strength of the second rotor sheet 116 can be ensured, even harmonics of an armature magnetic field can be restrained by changing one part of the sub-flux guide grooves, radial electromagnetic force waves generated by the interaction of the armature magnetic field harmonics and the rotor 100 magnetic field harmonics are obviously reduced, vibration noise of a key frequency range of the compressor 200 is improved, and the hearing of the compressor 200 is effectively improved.

As shown in fig. 2, in another embodiment of the present invention, the second magnetic flux guiding groove 117 includes: and any one group of sub-magnetic flux guide grooves is arranged in the area corresponding to one magnet slot 112, two sub-magnetic flux guide grooves positioned at the edge in any one group of sub-magnetic flux guide grooves are not communicated with the magnet slot 112, and the rest sub-magnetic flux guide grooves in any one group of sub-magnetic flux guide grooves are communicated with the magnet slot 112.

In this embodiment, it is specifically described that the second magnetic flux guide slot 117 includes a plurality of sets of sub magnetic flux guide slots, a set of sub magnetic flux guide slots is disposed in a region corresponding to any one of the magnet slots 112, two sub magnetic flux guide slots located at the edge of any one set of sub magnetic flux guide slots are not communicated with the magnet slot 112, and the remaining sub magnetic flux guide slots located at the middle of any one set of sub magnetic flux guide slots are communicated with the magnet slot 112. By arranging that one part of each group of sub-flux guide grooves is communicated with the magnet slot 112 and the other part of each group of sub-flux guide grooves is not communicated with the magnet slot 112, the structural strength of the second rotor sheet 116 can be ensured, even harmonics of an armature magnetic field can be restrained by changing one part of the sub-flux guide grooves, radial electromagnetic force waves generated by the interaction of the armature magnetic field harmonics and the rotor 100 magnetic field harmonics are obviously reduced, vibration noise of a key frequency range of the compressor 200 is improved, and the hearing of the compressor 200 is effectively improved.

As shown in fig. 3, in another embodiment of the present invention, the second flux guide groove 117 includes: and a plurality of sets of sub-flux guide grooves, any one set of sub-flux guide grooves being provided in an area corresponding to one of the magnet insertion grooves 112, the sub-flux guide grooves all being communicated with the magnet insertion groove 112.

In this embodiment, it is specifically described that the second magnetic flux guide groove 117 includes a plurality of sets of sub magnetic flux guide grooves, and a set of sub magnetic flux guide grooves is provided in a region corresponding to any one of the magnet insertion grooves 112, and all of the sub magnetic flux guide grooves of any one set communicate with the magnet insertion groove 112. The more the number of the second rotor punching sheets 116 is, the better the improvement effect of the low-frequency noise of the motor is, but the structural mechanical strength of the rotor core 110 may be deteriorated. By arranging that all the sub-magnetic flux guide grooves in each group are communicated with the magnet slot 112, the even harmonic of the armature magnetic field is further suppressed, the radial electromagnetic wave generated by the interaction of the armature magnetic field harmonic and the rotor 100 magnetic field harmonic is remarkably reduced, the vibration noise of the compressor 200 in the key frequency band is further improved, and the hearing of the compressor 200 is effectively improved.

As shown in fig. 4, in another embodiment of the present invention, the second magnetic flux guiding groove 117 includes: and any one of the plurality of sub-magnetic flux guide grooves is arranged in the area corresponding to one of the magnet slots 112, and any one of the plurality of sub-magnetic flux guide grooves is communicated with the magnet slot 112.

In this embodiment, it is specifically described that the second magnetic flux guide slot 117 includes a plurality of sets of sub magnetic flux guide slots, a set of sub magnetic flux guide slots is disposed in a region corresponding to any one of the magnet slots 112, any one of the sub magnetic flux guide slots in any one set of sub magnetic flux guide slots is communicated with the magnet slot 112, any one of the sub magnetic flux guide slots in each set of sub magnetic flux guide slots is communicated with the magnet slot 112, and the rest of the sub magnetic flux guide slots are not communicated with the magnet slot 112, so that the structural strength of the second rotor sheet 116 can be further ensured, and the service life of the rotor core 110 can be prolonged.

It should be noted that at least one sub-flux guide slot in any set of sub-flux guide slots is communicated with the magnet slot 112, so that the even harmonic of the armature magnetic field can be suppressed, the radial electromagnetic wave generated by the interaction between the armature magnetic field harmonic and the rotor 100 magnetic field harmonic is significantly reduced, the vibration noise of the compressor 200 in the key frequency band is improved, and the hearing of the compressor 200 is effectively improved. In practical application, one sub-flux guide slot located at the edge may be communicated with the magnet slot 112, one sub-flux guide slot located in the middle may be communicated with the magnet slot 112, or a plurality of (specifically, 2, 3, 4, etc.) sub-flux guide slots may be communicated with the magnet slot 112, both of which can suppress even harmonics of the armature magnetic field, and significantly reduce radial electromagnetic force waves generated by the interaction between the armature magnetic field harmonics and the rotor 100 magnetic field harmonics, thereby improving vibration noise of the compressor 200 at a key frequency band, and effectively improving the hearing effect of the compressor 200.

EXAMPLE III

As shown in fig. 1, 2, 3, 4, 5, and 6, in any of the above embodiments, in a cross section perpendicular to the rotation axis of the rotor 100, one end in the longitudinal direction of the magnetic flux guide groove is close to the magnet insertion groove 112, and the other end in the longitudinal direction of the magnetic flux guide groove extends toward a direction away from the magnet insertion groove 112.

In this embodiment, the extending direction of the length of the magnetic flux guide slot is specifically defined, specifically, in a cross section perpendicular to the rotation axis of the rotor 100, one end of the magnetic flux guide slot in the length direction is close to the magnet slot 112, and the other end of the magnetic flux guide slot in the length direction extends towards the direction away from the magnet slot 112, so that the arrangement direction of the magnetic flux guide slot is optimized, the magnetic flux density harmonic of the air gap of the rotor 100 is weakened, the torque fluctuation amount of the motor is reduced, the vibration noise is improved, the back electromotive force of the rotor 100 is increased, the armature iron loss is further effectively reduced, and the medium-low frequency energy efficiency of the compressor 200 is improved. Moreover, the structure is more convenient to realize the communication between the magnetic flux guide slot and the magnet slot 112, the performance of the motor is improved, and simultaneously, the even harmonic of the armature magnetic field can be restrained, the radial electromagnetic wave generated by the interaction of the armature magnetic field harmonic and the rotor 100 magnetic field harmonic is obviously reduced, the vibration noise of the compressor 200 in the key frequency band is further improved, and the hearing sense of the compressor 200 is effectively improved.

As shown in fig. 1, 2, 3, 4, 5, and 6, in any of the above embodiments, the magnet slots 112 include two sub-slots, which are disposed along the circumferential direction of the rotor core 110, and the first and second permanent magnets are respectively disposed in the two sub-slots to form magnetic poles; in any magnet slot 112, a first included angle is formed between the two sub-slots.

In this embodiment, the permanent magnet 120 includes a first permanent magnet and a second permanent magnet, the magnetic field strength of the first permanent magnet and the magnetic field strength of the second permanent magnet may be the same or different, the magnet slot 112 includes two sub-slots, the two sub-slots are arranged along the circumferential direction of the rotor core 110, the first permanent magnet and the second permanent magnet are respectively arranged in the two different sub-slots, wherein, in any one of the magnet slots 112, a first included angle is formed between the two sub-slots, that is, the first permanent magnet and the second permanent magnet are not parallel, and thus the resultant air gap magnetic field waveform can be improved, the vibration noise of the motor is reduced, and the medium-low frequency energy efficiency of the compressor 200 is improved.

Further, the first included angle is 110 ° or more and 150 ° or less. Through setting up the contained angle between first permanent magnet and the second permanent magnet between 110 and 150, can make the back electromotive force of permanent magnet 120 reach the maximize, and then guarantee compressor 200's low frequency efficiency, promote APF annual energy consumption efficiency.

As shown in fig. 1, 2, 3, 4, 5 and 6, in any of the above embodiments, two sub slots are communicated with each other in any one of the magnet slots 112, and a positioning bump 118 is disposed at a connection point of the two sub slots, and the positioning bump 118 protrudes into the magnet slot 112.

In this embodiment, two sub slots in any one of the magnet slots 112 are communicated with each other, and a fastening bump 118 is provided at a connection point of the two sub slots, the fastening bump 118 protrudes into the magnet slot 112, and the position of the permanent magnet 120 is limited by the fastening bump 118 between the connection points of the two sub slots, so that the load magnetic density of the motor is improved, the air gap magnetic density waveform of the motor is optimized, and further, the radial force of the motor is improved and the noise of the motor is reduced.

Example four

In any of the above embodiments, the second rotor lamination 116 is sandwiched between the first rotor laminations 114; or the first rotor punching sheet 114 is clamped between the second rotor punching sheets 116; or the first rotor lamination 114 is located above the second rotor lamination 116; or the first rotor lamination 114 is positioned below the second rotor lamination 116; or the first rotor punching sheet 114 and the second rotor punching sheet 116 are alternately stacked.

In this embodiment, several arrangements of the first rotor punching sheet 114 and the second rotor punching sheet 116 are specifically described. Specifically, the second rotor lamination 116 stacked to a certain thickness is sandwiched between two groups of first rotor laminations 114 stacked to a certain thickness; or, the first rotor punching sheets 114 stacked to a certain thickness are sandwiched between two groups of second rotor punching sheets 116 stacked to a certain thickness; or the first rotor punching sheets 114 stacked to a certain thickness are located above the second rotor punching sheets 116 stacked to a certain thickness, that is, a group of first rotor punching sheets 114 are stacked above a group of second rotor punching sheets 116 to form the rotor core 110, so that the processing technology of the rotor core 110 is simplified, and the production efficiency is improved; or the first rotor punching sheets 114 stacked to a certain thickness are located below the second rotor punching sheets 116 stacked to a certain thickness, that is, a group of first rotor punching sheets 114 are stacked below a group of second rotor punching sheets 116 to form the rotor core 110, so that the processing technology of the rotor core 110 is simplified, and the production efficiency is improved; or, the first rotor punching sheet 114 and the second rotor punching sheet 116 are alternately stacked, and the first rotor punching sheet 114 and the second rotor punching sheet 116 are alternately stacked, so that the punching sheets communicated with the magnetic flux guide groove and the magnet slot 112 are more uniformly distributed in the height direction of the rotor core 110, thereby improving the even harmonic of the armature magnetic field, remarkably reducing the effect of radial electromagnetic force waves generated by the interaction of the armature magnetic field harmonic and the rotor 100 magnetic field harmonic, further improving the vibration noise of the compressor 200 in the key frequency band, and effectively improving the hearing of the compressor 200.

As shown in fig. 1, 2, 3, 4, 5 and 6, in any of the above embodiments, the rotor core 110 has a profile including straight lines and/or curved lines in a cross section perpendicular to the rotation axis of the rotor 100.

In this embodiment, the contour of each flux guide groove may be formed by a straight line and/or a curved line, and the contour of each flux guide groove may be a single straight line or a curved line, or a combination of a straight line and a curved line, thereby rationalizing the circuit.

As shown in fig. 1, 2, 3, 4, 5, and 6, in any of the above embodiments, the outer peripheral wall of the rotor core 110 has a cylindrical shape; and/or rotor core 110 includes: the plurality of first rotor punching sheets 114 and the plurality of second rotor punching sheets 116 are stacked along a rotation axis direction of the rotor 100, a riveting portion is arranged between adjacent magnet slots 112, and the plurality of first rotor punching sheets 114 and the plurality of second rotor punching sheets 116 are connected through the riveting portion.

In this embodiment, the rotor core 110 is formed by stacking a plurality of first rotor sheets 114 and a plurality of second rotor sheets 116, and a rivet portion is provided between adjacent magnet slots 112 to fix a magnet and ensure reliability of the rotor core 110.

EXAMPLE five

According to the utility model discloses a second aspect has still provided a permanent magnet synchronous motor, include: the rotor 100 according to any of the above-mentioned embodiments.

The utility model discloses the permanent magnet synchronous motor that the second aspect provided, because of rotor 100 including the suggestion of any above-mentioned technical scheme, consequently have rotor 100's whole beneficial effect, no longer describe herein.

In any of the above embodiments, the permanent magnet synchronous machine further comprises: a stator 210, the stator 210 including a stator core and teeth arranged along a circumferential direction of the stator core, the rotor 100 being rotatably disposed within the stator 210.

In this embodiment, the stator 210 includes stator cores and teeth, the slots of the stator 210 are defined between adjacent teeth, the coils are wound on the teeth, the stator cores are arranged around the outside of the rotor 100, and the rotor 100 is rotatably positioned in the stator 210, so that the rotor 100 is better matched with the stator 210.

In any of the above embodiments, the inner diameter of the stator core is Di, the rated torque of the permanent magnet synchronous motor is T, and the unit volume torque of the rotor 100 is TPV, which satisfy the following relation: 5.18X 10^-7≤T×Di^-3×TPV^-1≤1.17×10^-6，5kN·m·m^-3≤TPV≤45kN·m·m^-3(ii) a Wherein the rated torque T of the permanent magnet synchronous motor is expressed in the unit of N.m, the inner diameter Di of the stator core is expressed in the unit of mm, and the unit volume torque TPV of the rotor 100 is expressed in the unit of kN.m.m^-3。

In this embodiment, the permanent magnet synchronous motor has a rated torque T, an inner diameter of a stator core is Di, and a unit volume torque TPV of the rotor 100, and satisfies 5.18 × 10^-7≤T×Di^-3×TPV^-1≤1.17×10^-6The value range of the unit volume torque TPV is 5 kN.m.m^-3≤TPV≤45kN·m·m^-3The numerical range of the combined variables of the rated torque T of the permanent magnet synchronous motor, the inner diameter Di of the stator core and the unit volume torque TPV of the rotor 100 is limited, so that the permanent magnet synchronous motor can meet the power requirement of the compressor 200, and in addition, the permanent magnet synchronous motor and the compressor 200 adopting the rotor 100 can effectively reduce the magnetic leakage of the rotor 100, increase the utilization rate of the permanent magnet 120 and improve the efficiency of the permanent magnet synchronous motor.

The embodiment of the present invention provides a permanent magnet synchronous motor, including the utility model discloses rotor 100 that the embodiment of the first aspect provides, rotor 100 is used for permanent magnet synchronous motor, permanent magnet synchronous motor includes stator 210, rotor 100 can set up in stator 210 rotatably, rotor 100 includes rotor core 110, rotor core 110 is provided with a plurality of magnet slots 112, a plurality of magnet slots 112 are distributed along the circumference of rotor core 110; permanent magnets 120 disposed in the magnet slots 112 to form magnetic poles, the permanent magnets 120 including first and second permanent magnets; and a plurality of magnetic flux guide grooves provided on the rotor core 110, the plurality of magnetic flux guide grooves being located on a side of the magnet insertion groove 112 away from the rotation center 102 of the rotor, at least one of the plurality of magnetic flux guide grooves being communicated with the magnet insertion groove 112. The embodiment of the utility model provides a rotor 100, including rotor core 110 and a plurality of magnetic flux guide ways of setting on rotor core 110, be provided with a plurality of magnet slots 112 on rotor core 110, specifically, magnet slot 112 is used for installing permanent magnet 120 in order to form the magnetic pole, the magnetic pole that permanent magnet 120 in the adjacent magnet slot 112 formed is opposite, on rotor core 110, the magnetic flux guide way is located one side that magnet slot 112 deviates from the rotation center 102 of rotor, and, at least one communicates with magnet slot 112 in a plurality of magnetic flux guide ways, thereby be favorable to restraining the even harmonic in armature magnetic field, show and reduce the radial electromagnetic force ripples that armature magnetic field harmonic and rotor 100 magnetic field harmonic acted on and produced, and then improve the vibration noise of compressor 200 key frequency channel, effectively improve compressor 200 auditory sensation.

EXAMPLE six

As shown in fig. 7, according to a third aspect of the present invention, there is also provided a compressor 200, including: the rotor 100 according to any of the above aspects of the first aspect; or the permanent magnet synchronous motor according to any of the above-mentioned second aspects.

The third aspect of the present invention provides a compressor 200, which includes the rotor 100 proposed by any one of the above-mentioned first aspect; or the permanent magnet synchronous motor according to any of the above technical solutions of the second aspect, so that the rotor 100 or the permanent magnet synchronous motor has all the advantages, which are not described herein again.

Further, as shown in fig. 7, the compressor 200 includes a housing 270 and a pump body, the housing 270 forms a containing cavity, the pump body and the permanent magnet synchronous motor are disposed in the containing cavity, and the operation of the permanent magnet synchronous motor can drive the pump body to work, so as to realize the compression and exhaust functions of the compressor 200.

Further, as shown in fig. 7, the pump body includes: a crankshaft 220 inserted through the rotor core 110 of the rotor 100 and connected to the rotor core 110; a power section coupled to the shaft and operatively configured to drive the shaft for rotation. Compressor 200 still includes bent axle 220 and power portion, and bent axle 220 wears to locate rotor core 110 of rotor 100, and bent axle 220 connects rotor core 110 and power portion, and then can drive bent axle 220 and rotate and then drive rotor core 110 and rotate when power portion work. Specifically, the crankshaft 220 of the compressor 200 is connected to the rotor core 110 through a shaft hole of the rotor core 110.

Specifically, as shown in fig. 7, the compressor 200 further includes a main bearing 230, an auxiliary bearing 260, a cylinder 240, and a piston 250, wherein one end of the crankshaft 220 is inserted into the rotor 100, and the other end of the crankshaft passes through the main bearing 230, the cylinder 240, and the auxiliary bearing 260 in sequence.

The embodiment of the present invention provides a compressor 200, including the utility model discloses a rotor 100 that the embodiment of the first aspect provides, rotor 100 is used for the permanent magnet synchronous machine, the permanent magnet synchronous machine includes stator 210, rotor 100 can set up in stator 210 rotatably, rotor 100 includes rotor core 110, rotor core 110 is provided with a plurality of magnet slots 112, a plurality of magnet slots 112 are distributed along the circumference of rotor core 110; permanent magnets 120 disposed in the magnet slots 112 to form magnetic poles, the permanent magnets 120 including first and second permanent magnets; and a plurality of magnetic flux guide grooves provided on the rotor core 110, the plurality of magnetic flux guide grooves being located on a side of the magnet insertion groove 112 away from the rotation center 102 of the rotor, at least one of the plurality of magnetic flux guide grooves being communicated with the magnet insertion groove 112. The embodiment of the utility model provides a rotor 100, including rotor core 110 and a plurality of magnetic flux guide ways of setting on rotor core 110, be provided with a plurality of magnet slots 112 on rotor core 110, specifically, magnet slot 112 is used for installing permanent magnet 120 in order to form the magnetic pole, the magnetic pole that permanent magnet 120 in the adjacent magnet slot 112 formed is opposite, on rotor core 110, the magnetic flux guide way is located one side that magnet slot 112 deviates from the rotation center 102 of rotor, and, at least one communicates with magnet slot 112 in a plurality of magnetic flux guide ways, thereby be favorable to restraining the even harmonic in armature magnetic field, show and reduce the radial electromagnetic force ripples that armature magnetic field harmonic and rotor 100 magnetic field harmonic acted on and produced, and then improve the vibration noise of compressor 200 key frequency channel, effectively improve compressor 200 auditory sensation.

EXAMPLE seven

According to the utility model discloses a fourth aspect still provides a refrigeration plant, include: the rotor 100 according to any of the above aspects of the first aspect; or the permanent magnet synchronous motor provided by any technical scheme of the second aspect; or the compressor 200 according to any of the above-mentioned solutions of the third aspect.

The refrigeration equipment provided by the fourth aspect of the present invention includes the rotor 100 proposed by any one of the above-mentioned technical solutions of the first aspect; or the permanent magnet synchronous motor provided by any technical scheme of the second aspect; or the compressor 200 according to any of the above-mentioned third technical solutions, so that all the advantages of the rotor 100 or the permanent magnet synchronous motor or the compressor 200 are achieved, and are not described herein again.

The embodiment of the utility model provides a refrigeration plant, including the utility model discloses the rotor 100 that the embodiment of the first aspect provided, rotor 100 is used for permanent magnet synchronous machine, and permanent magnet synchronous machine includes stator 210, and rotor 100 can set up in stator 210 with rotating, and rotor 100 includes rotor core 110, and rotor core 110 is provided with a plurality of magnet slots 112, and a plurality of magnet slots 112 distribute along rotor core 110's circumference; permanent magnets 120 disposed in the magnet slots 112 to form magnetic poles, the permanent magnets 120 including first and second permanent magnets; and a plurality of magnetic flux guide grooves provided on the rotor core 110, the plurality of magnetic flux guide grooves being located on a side of the magnet insertion groove 112 away from the rotation center 102 of the rotor, at least one of the plurality of magnetic flux guide grooves being communicated with the magnet insertion groove 112. The embodiment of the utility model provides a rotor 100, including rotor core 110 and a plurality of magnetic flux guide ways of setting on rotor core 110, be provided with a plurality of magnet slots 112 on rotor core 110, specifically, magnet slot 112 is used for installing permanent magnet 120 in order to form the magnetic pole, the magnetic pole that permanent magnet 120 in the adjacent magnet slot 112 formed is opposite, on rotor core 110, the magnetic flux guide way is located one side that magnet slot 112 deviates from the rotation center 102 of rotor, and, at least one communicates with magnet slot 112 in a plurality of magnetic flux guide ways, thereby be favorable to restraining the even harmonic in armature magnetic field, show and reduce the radial electromagnetic force ripples that armature magnetic field harmonic and rotor 100 magnetic field harmonic acted on and produced, and then improve the vibration noise of compressor 200 key frequency channel, effectively improve compressor 200 auditory sensation.

In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly and include, for example, fixed connections, detachable connections, or integral connections; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present specification, 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 rotor for an electric machine including a stator within which the rotor is rotatably disposed, the rotor comprising:

a rotor core;

the magnet slots are arranged on the rotor core, and a plurality of magnet slots are distributed along the circumferential direction of the rotor core;

permanent magnets disposed in the magnet slots to form magnetic poles, the permanent magnets including a first permanent magnet and a second permanent magnet;

the magnetic flux guiding slots are arranged on the rotor core and located on one side, deviating from the rotation center of the rotor, of the magnet slots, and at least one of the magnetic flux guiding slots is communicated with the magnet slots.

2. The rotor of claim 1, wherein the rotor core comprises:

a first rotor sheet, a portion of the plurality of flux guide slots disposed on the first rotor sheet;

and part of the magnetic flux guide grooves are formed in the second rotor punching sheet, and the first rotor punching sheet and the second rotor punching sheet are arranged in a stacked mode along the rotation axis direction of the rotor.

3. The rotor of claim 2, wherein the plurality of flux guide slots comprise:

the first magnetic flux guide groove is arranged on the first rotor punching sheet and is not communicated with the magnet slot;

and the second magnetic flux guide grooves are formed in the second rotor punching sheet, and at least one of the second magnetic flux guide grooves is communicated with the magnet slot.

4. The rotor of claim 3, wherein the second flux guide slot comprises:

and any group of sub magnetic flux guide grooves are arranged in an area corresponding to one magnet slot, two sub magnetic flux guide grooves positioned at the edge in any group of sub magnetic flux guide grooves are communicated with the magnet slot, and the rest sub magnetic flux guide grooves in any group of sub magnetic flux guide grooves are not communicated with the magnet slot.

5. The rotor of claim 3, wherein the second flux guide slot comprises:

and any group of sub magnetic flux guide grooves are arranged in an area corresponding to one magnet slot, two sub magnetic flux guide grooves positioned at the edge in any group of sub magnetic flux guide grooves are not communicated with the magnet slot, and the rest sub magnetic flux guide grooves in any group of sub magnetic flux guide grooves are communicated with the magnet slot.

6. The rotor of claim 3, wherein the second flux guide slot comprises:

and any group of sub-magnetic flux guide grooves are arranged in an area corresponding to one magnet slot, and all the sub-magnetic flux guide grooves are communicated with the magnet slot.

7. The rotor of claim 3, wherein the second flux guide slot comprises:

and any one of the sub-magnetic flux guide grooves of any one group is communicated with the magnet slot.

8. The rotor of claim 3,

the second rotor punching sheet is clamped between the first rotor punching sheets; or

The first rotor punching sheets are clamped between the second rotor punching sheets; or

The first rotor punching sheet is positioned above the second rotor punching sheet; or

The first rotor punching sheet is positioned below the second rotor punching sheet; or

The first rotor punching sheet and the second rotor punching sheet are alternately stacked.

9. The rotor of any one of claims 1 to 3,

in a cross section perpendicular to the rotation axis of the rotor, one end in the longitudinal direction of the magnetic flux guide groove is close to the magnet insertion groove, and the other end in the longitudinal direction of the magnetic flux guide groove extends toward a direction away from the magnet insertion groove.

10. The rotor of any one of claims 1 to 3,

the magnet slots comprise two sub slots, the two sub slots are arranged along the circumferential direction of the rotor core, and the first permanent magnet and the second permanent magnet are respectively arranged in the two sub slots to form the magnetic poles;

in any magnet slot, a first included angle is formed between the two sub slots.

11. The rotor of claim 10,

in any magnet slot, two sub-slots are communicated, a clamping convex point is arranged at the joint of the two sub-slots, and the clamping convex point protrudes towards the interior of the magnet slot.

12. A permanent magnet synchronous motor, comprising:

a rotor according to any one of claims 1 to 11.

13. The permanent magnet synchronous motor of claim 12, further comprising:

the stator comprises a stator core and tooth parts arranged along the circumferential direction of the stator core, and the rotor is rotatably arranged in the stator.

14. The permanent magnet synchronous machine of claim 13,

the inner diameter of the stator core is Di, the rated torque of the permanent magnet synchronous motor is T, the unit volume torque of the rotor is TPV, and the following relational expression is satisfied: 5.18X 10^-7≤T×Di^-3×TPV^-1≤1.17×10^-6，5kN·m·m^-3≤TPV≤45kN·m·m^-3；

Wherein the unit of rated torque T of the permanent magnet synchronous motor is N.m, the unit of inner diameter Di of the stator core is mm, and the unit of unit volume torque TPV of the rotor is kN.m.m^-3。

15. A compressor, comprising:

a rotor as claimed in any one of claims 1 to 11; or

A permanent magnet synchronous machine according to any of claims 12 to 14.

16. A refrigeration apparatus, comprising:

a rotor as claimed in any one of claims 1 to 11; or

A permanent magnet synchronous machine according to any one of claims 12 to 14; or

The compressor of claim 15.