CN214255874U - Motor and electric appliance - Google Patents

Abstract

The utility model provides a motor and electrical apparatus. The motor includes a stator and a rotor. The stator includes a stator core including stator poles. The rotor is provided with rotor magnetic poles which are matched with the stator magnetic poles. The number of stator poles ranges from 28 to 36 and the number of rotor poles ranges from 37 to 48. The utility model discloses can avoid stator magnetic pole quantity too much for the unit motor number is more reasonable, has avoided stator slot quantity too much simultaneously, reduces the degree of difficulty of winding coil on stator magnetic pole, has reduced winding coil's wire winding stroke, and then improves production efficiency, reduces motor cost.

Description

Motor and electric appliance

Technical Field

The utility model relates to the technical field of motors, particularly, relate to a motor and an electrical apparatus.

Background

For electrical equipment such as a washing machine, the ratio of the number of stator slots to the number of rotor poles (i.e., slot pole fit) of the motor has a significant effect on the performance of the motor.

Taking a motor used in a direct drive washing machine as an example, the motor is usually provided with 27 stator poles, so that 27 stator slots are provided and 36 rotor poles are provided. So that the ratio of the number of stator slots to rotor poles is 3: 4. Under the matching of the slot poles, the cogging torque of the motor is large, so that the motor generates large vibration and noise during running, and the service performance of the motor is reduced.

In the related art, the cogging torque of the motor is reduced by increasing the number of unit motors. However, when the number of the unit motors is increased, the number of the stator slots is increased, the winding stroke of the winding coil is correspondingly increased due to the increase of the number of the stator slots, and the production efficiency of the motor is reduced. For example, for a slot pole matching mode in which the stator has 27 slots and the rotor has 36 magnetic poles, the motor cogging torque is large, and the motor performance is not ideal.

In conclusion, a technical scheme which can ensure reasonable slot pole matching mode and ensure convenient and fast winding mode is lacked in the related technology.

SUMMERY OF THE UTILITY MODEL

The present invention aims to solve at least one of the above technical problems.

Therefore, the first object of the present invention is to provide an electric machine.

A second object of the present invention is to provide an electrical appliance.

For realizing the utility model discloses a first purpose, the technical scheme of the utility model provide a motor, include: a stator including a stator core including stator poles; the rotor is provided with a rotor magnetic pole matched with the stator magnetic pole; the number of stator poles ranges from 28 to 36 and the number of rotor poles ranges from 37 to 48.

This technical scheme is 28 to 36 through setting up stator magnetic pole quantity, and rotor magnetic pole quantity is 37 to 48, and the unit motor number of having guaranteed the motor is more reasonable. For example, the number of the stator poles in the present embodiment may be 30, and the number of the rotor poles may be 40. Again for example, the number of the stator poles in the present solution may be 36, and the number of the rotor poles may be 48. According to the technical scheme, the number of the stator magnetic poles, the number of the rotor magnetic poles and the proportional relation between the stator magnetic poles and the rotor magnetic poles are limited, so that the cogging torque can be effectively reduced, the winding stroke and the winding time are relatively reasonable, and the production efficiency and the convenience degree of product installation and assembly are ensured.

Additionally, the utility model discloses above-mentioned technical scheme that provides can also have following additional technical characteristics:

in the above technical solution, the number of the stator magnetic poles is 30, and the number of the rotor magnetic poles is 40.

The technical scheme can avoid the excessive number of the stator magnetic poles, and thereby the difficulty of winding the winding coil on the stator magnetic poles is reduced. In addition, the technical scheme reduces the winding stroke of the winding coil, thereby improving the production efficiency and reducing the motor cost.

In any of the above technical solutions, the stator core further includes: a yoke portion; the stator poles are arranged around the edge of the yoke and enclose stator slots with the yoke, the number of which ranges from 28 to 36.

This technical scheme is through the quantity that rationally sets up stator slot, can reduce the tooth's socket torque of motor, further promotes the performance of motor.

In any of the above technical solutions, the number of the stator slots is 30.

This technical scheme is 30 through the quantity that sets up the stator magnetic pole, and the quantity of stator slot is 30 equally, and the quantity of stator slot is more reasonable among this technical scheme, and then has reduced the degree of difficulty of winding coil on the stator magnetic pole, reduces winding coil's wire winding stroke, improves motor production efficiency, reduces motor cost.

In any of the above technical solutions, the stator magnetic pole includes a first stator magnetic pole, a second stator magnetic pole and a third stator magnetic pole which are adjacently arranged in sequence, the stator further includes a winding coil, the winding coil includes a first phase winding coil, the first phase winding coil is wound around the first stator magnetic pole, and is sequentially wound around an nth stator magnetic pole from the first stator magnetic pole; the second phase winding coil is wound on the second stator magnetic pole and is sequentially wound on the Nth stator magnetic pole from the second stator magnetic pole; the third phase winding coil is wound on the third stator magnetic pole and is sequentially wound on the Nth stator magnetic pole from the third phase winding coil; wherein the value of N is an integral multiple of 3.

In the technical scheme, the winding coil is wound on the stator magnetic pole, so that the winding coil can generate a rotating magnetic field after being electrified, and further the rotation of the driving rotor is realized. And three-phase different winding coils are wound on the stator magnetic poles, so that the running reliability of the motor is improved. Only one phase winding coil is wound on each stator pole, and the winding coils on adjacent stator poles are different from each other. The technical scheme can avoid the mutual influence of magnetic fields generated by the winding coils after being electrified, and improve the stability of the motor.

In any of the above technical solutions, the stator core is formed by splicing at least two stacked bodies, and any stacked body includes at least two stacked stator punching sheets.

The stator core body is formed by splicing at least two stacked bodies in the technical scheme, so that the stator core body is convenient to machine and form, the production efficiency of the motor is further improved, and the cost of the motor is reduced. The stack body includes two at least superimposed stator punching sheets, realizes setting up the quantity of stator punching sheet according to user's demand for the different thickness of stack body improves the suitability of stator core.

In any of the above solutions, the number of stacked bodies is 10, and any stacked body includes 3 stator poles.

The quantity of pile body among this technical scheme is 10, avoids the crooked radian of pile body too big, and the shaping assembly of being convenient for improves the production efficiency of stator core. And any stacked body comprises 3 stator magnetic poles, so that the regularity of the structure of the stacked body is improved, the processing and forming of the stacked body are facilitated, and the cost of the motor is reduced.

In any of the above technical solutions, the stator further includes a winding coil wound around the stator magnetic pole; and an insulating member provided between the stator pole and the winding coil.

In the technical scheme, the insulating part is arranged on the stator magnetic pole, the winding coil is wound on the insulating part, and the insulating part plays an insulating role between the winding coil and the stator magnetic pole, so that the normal work of the motor is ensured.

In any of the above technical solutions, the insulating member has an integral structure covering the surface of the stator magnetic pole; or the insulating component is formed by splicing at least two split sub-components.

Insulating part can the cladding on the stator magnetic pole surface among this technical scheme, improves insulating part's insulating effect, and then improves the stability of motor. The insulating part can also be formed by splicing two split type sub-parts, so that the insulating part is convenient to form and assemble, and the production efficiency of the motor is improved.

In any of the above technical solutions, the stator further includes a reinforcing portion, the stator core is annular, and the reinforcing portion is disposed on an inner periphery of the stator core.

The reinforcing part sets up at the inside periphery of stator core among this technical scheme, plays the reinforcing action to the stator core, avoids the stator core condition such as fracture, buckle to appear, improves the stability of motor, the life of extension motor.

In any of the above solutions, the plurality of reinforcing portions are arranged at intervals along the inner periphery of the stator core.

The reinforcing part is arranged along the inner periphery of the stator core body at intervals in the technical scheme, so that the stator core body and other components can be conveniently mounted and assembled, the size of the stator core body can be ensured to be small, and the space utilization is reasonable.

In any of the above technical solutions, at least a part of the edge of the reinforcing part is arc-shaped.

In this technical scheme, the at least partial edge of rib is the arc, and the stator core of being convenient for assembles with other parts, and then improves the production efficiency of motor.

In any of the above technical solutions, the rotor includes a magnetic conductive ring, and the magnetic conductive ring surrounds the stator; and the permanent magnet is arranged on the magnetic conduction ring and comprises a rotor magnetic pole.

The stator is encircled to the magnetic conduction ring among this technical scheme, and permanent magnet and rotor magnetic pole setting are on the magnetic conduction ring, make the rotor can produce the electric current under the effect of rotating magnetic field through permanent magnet and rotor magnetic pole, and then realize that the rotor rotates under the effect of rotating magnetic field.

Among any above-mentioned technical scheme, the rotor still includes the wheel hub frame, and wheel hub frame encloses out accommodation space with the magnetic conduction ring, and accommodation space is located to at least part of stator.

At least part setting of stator among this technical scheme is in the accommodation space that wheel hub frame and magnetic conduction ring enclosed to make the rotating magnetic field that the stator produced can be cut by the rotor, and then realize the rotation of rotor relative to the stator. The hub frame is used for supporting the permanent magnet and the rotor magnetic pole, and the permanent magnet and the rotor magnetic pole are prevented from shaking relative to the magnetic conduction ring when the rotor rotates, so that the operation of the motor is prevented from being influenced.

In any of the above technical solutions, the hub frame and the magnetic conductive ring are made of the same material and have an integrated structure; or the hub frame and the magnetic conduction ring are made of different materials and have a split structure.

The hub frame and the magnetic conduction ring can be of an integrally formed structure in the technical scheme, and the hub frame and the magnetic conduction ring are made of the same material, so that the rotor can be conveniently machined and formed, and the stability of the motor is improved. The hub frame and the magnetic conduction ring can also be of detachable structures, and the hub frame and the magnetic conduction ring are made of different materials, so that the rotor is convenient to mount and maintain, and the cost of the motor is reduced.

In any of the above technical solutions, the thickness range of the stator core is 12 mm to 30 mm; and/or the inner diameter of the yoke of the stator core ranges from 140 mm to 220 mm; and/or the width of the yoke of the stator core ranges from 4 mm to 12 mm; and/or the length of the stator pole ranges from 18 mm to 40 mm; and/or the thickness of the magnetic conductive ring of the rotor ranges from 1.5 mm to 5 mm.

The thickness range of stator core is 12 millimeters to 30 millimeters among this technical scheme, avoids the too thin intensity that reduces the stator of stator core, perhaps the too thick motor cost that increases of stator core. The diameter range of yoke portion is 140 millimeters to 220 millimeters, avoids yoke portion diameter too big, causes the stator can't place in accommodation space, perhaps yoke portion diameter undersize, leads to the clearance between stator and the rotor too big, influences motor work. The width scope of yoke portion is 4 millimeters to 12 millimeters, avoids yoke portion too narrow, can't bear the weight of the stator magnetic pole, perhaps yoke portion too wide, increases the motor cost. The length range of the stator magnetic pole is 18 mm to 40 mm, so that the phenomenon that the length of the stator magnetic pole is too long and the cost of the motor is increased or the length of the stator magnetic pole is too short is avoided, and the winding space of a winding coil is reduced. The thickness range of the magnetic conduction ring of the rotor is 1.5 mm to 5 mm, so that the situation that the magnetic conduction ring is too narrow to bear the permanent magnet, the rotor magnetic pole and the like or the magnetic conduction ring is too wide is avoided, and the weight and the cost of the motor are increased.

For realizing the utility model discloses a second purpose, the technical scheme of the utility model a motor that electrical apparatus includes above-mentioned arbitrary technical scheme is provided to the motor, and the motor is used for driving electrical apparatus work, consequently has above-mentioned arbitrary technical scheme's whole beneficial effect, no longer gives unnecessary details here.

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 is a schematic structural view of an electric machine according to some embodiments of the present invention;

fig. 2 is a schematic structural view of a stator core according to some embodiments of the present invention;

fig. 3 is a schematic diagram of the matching relationship between the stator core and the winding coil according to some embodiments of the present invention;

fig. 4 is a schematic diagram of a winding pattern of a winding coil according to some embodiments of the present invention;

fig. 5 is one of the schematic structural views of a stack according to some embodiments of the present invention;

fig. 6 is a second schematic structural view of a stack according to some embodiments of the present invention;

fig. 7 is one of schematic structural diagrams of stator laminations according to some embodiments of the present invention;

fig. 8 is a second schematic structural view of a stator lamination according to some embodiments of the present invention;

fig. 9 is a schematic structural view of a rotor according to some embodiments of the present invention;

fig. 10 is a block diagram of an appliance in accordance with some embodiments of the present invention;

fig. 11 is a graph comparing the washing efficiency and the dewatering efficiency of the motor according to the number of different pole slots (under the low-speed load condition) according to some embodiments of the present invention;

fig. 12 is a graph comparing the washing efficiency and the dewatering efficiency of the motor according to the number of different pole slots (under high speed load) in some embodiments of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 10 is:

100: stator, 110: stator core, 112: yoke, 114: stator pole, 1142: first stator pole, 1144: second stator pole, 1146: third stator pole, 116: stator slot, 120: winding coil, 1202: direction of current flow, 1204: current outflow direction, 122: first phase winding coil, 124: second phase winding coil, 126: third-phase winding coil, 130: insulating member, 132: split sub-assembly, 134: first split sub-component, 136: second split sub-component, 140: reinforcing portion, 150: a stack, 152: stator punching, 200: a rotor, 222: rotor magnetic pole, 210: magnetic conductive ring, 220: permanent magnet, 230: hub frame, 240: accommodating space, 300: motor, 400: an electric appliance.

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.

The electric machine 300 and the electric appliance 400 of some embodiments of the present invention are described below with reference to fig. 1 to 12.

Example 1:

as shown in fig. 1, the present embodiment provides a motor 300 including a stator 100 and a rotor 200. The stator 100 includes a stator core 110, and the stator core 110 includes stator poles 114. The rotor 200 is provided with rotor poles 222 that cooperate with the stator poles 114. The number of stator poles 114 ranges from 28 to 36 and the number of rotor poles 222 ranges from 37 to 48.

The motor 300 in this embodiment may be a three-phase motor. The motor 300 includes a stator 100 and a rotor 200, and the stator 100 includes a stator core 110 and stator poles 114. It is understood that the stator core 110 has a circular ring structure or an elliptical ring structure, and the stator poles 114 are uniformly distributed on the outer circumference of the stator core 110 and are integrally molded with the stator core 110.

In some embodiments of the present embodiment, the stator core 110 may be made of cast iron or silicon steel sheet. In this embodiment, the thickness, width, or diameter of the stator core 110 may be set or changed according to the production and processing requirements, so as to improve the adaptability of the motor 300 and meet the use requirements of different users.

The rotor 200 is shaped and sized to fit the stator core 110 and is rotatable relative to the stator 100. The rotor magnetic poles 222 are uniformly distributed on the rotor 200, and can be integrated with the rotor 200 to improve the stability of the rotor 200. The rotor magnetic pole 222 can be detachably connected with the rotor 200 through a structure such as a buckle, a sliding groove and the like, so that the rotor 200 can be conveniently installed and maintained.

In the present embodiment, by setting the number of the stator poles 114 to 30 and the number of the rotor poles 222 to 40, the number of the stator poles 114 can be prevented from being too large, and the number of the unit motors of the motor 300 can be more reasonable. On the basis of ensuring that the number of the unit motors is reasonable, the number of the stator magnetic poles 114 is reasonably set by the embodiment, so that the excessive number of the stator slots 116 between two adjacent stator magnetic poles 114 is avoided, the difficulty of winding the winding coil 120 on the stator magnetic poles 114 is reduced, the winding stroke of the winding coil 120 is reduced, the production efficiency is improved, and the cost of the motor 300 is reduced. In addition, when the motor in the related art rotates, the larger the motor cogging torque is, the more easily vibration or noise occurs during operation, and the usability of the motor is affected. In this embodiment, by reasonably setting the number of the stator magnetic poles 114 and the rotor magnetic poles 222, the cogging torque of the motor 300 can be reduced, the vibration and noise generated during the operation of the motor 300 can be reduced, and the use performance of the motor 300 can be improved.

For example, the number of the stator poles 114 may be 30 and the number of the rotor poles 22 may be 40 in the present embodiment. Again, for example, the number of the stator poles 114 in the present embodiment may be 36, and the number of the rotor poles 222 may be 48. In the embodiment, the number of the stator magnetic poles 114, the number of the rotor magnetic poles 222 and the proportional relation between the stator magnetic poles and the rotor magnetic poles are limited, so that the cogging torque can be effectively reduced, and the winding stroke and the winding time are relatively reasonable, so that the production efficiency is reduced and the convenience degree of product installation and assembly is ensured.

In some embodiments of the present embodiment, the number of stator poles 114 is 30 and the number of rotor poles 222 is 40.

For the motor 300, as the number of unit motors increases, the number of poles increases synchronously, the inter-pole leakage is aggravated, and the motor back electromotive force slightly decreases, so that the efficiency of the motor 300 decreases under a low-speed load condition (e.g., a washing condition of a washing machine), but the efficiency of the motor 300 gradually increases under a high-speed flux weakening condition (e.g., a dewatering condition of the washing machine). As shown in fig. 11 and 12, compared with the technical solutions that the number of the stator poles 114 is 27, the number of the rotor poles 222 is 36, the number of the stator poles 114 is 33, the number of the rotor poles 222 is 44, the number of the stator poles 114 is 36, and the number of the rotor poles 222 is 48, the technical solutions that the number of the stator poles 114 is 30 and the number of the rotor poles 222 is 40 can both achieve the low-speed performance and the high-speed weak magnetic performance, and the comprehensive performance and the cost thereof are optimal.

Example 2:

as shown in fig. 2, the present embodiment provides a motor 300, and in addition to the technical features of embodiment 1 described above, the present embodiment further includes the following technical features.

The stator core 110 further includes a yoke portion 112. The stator poles 114 are disposed around the edge of the yoke 112 and surround the yoke 112 with stator slots 116, the number of stator slots 116 ranging from 28 to 36.

The stator core 110 in the present embodiment includes a yoke 112, and it is understood that the stator poles 114 are uniformly distributed over the outer periphery of the yoke 112 and radially extend in the circumferential direction of the yoke 112. The stator slots 116 are enclosed between two adjacent stator poles 114 and the yoke 112, it being understood that the number of stator poles 114 is equal to the number of stator slots 116, and the winding coil 120 is wound on the stator poles 114 through the stator slots 116.

In some embodiments of the present embodiment, the number of stator slots 116 is 30.

In the present embodiment, by setting the number of the stator poles 114 to 30, the number of the stator slots 116 is also 30. The number of the stator slots 116 is more reasonable due to the arrangement, the excessive number of the stator slots 116 is avoided, the difficulty of winding the coil on the stator magnetic pole 114 is reduced, the winding stroke of the winding coil 120 is reduced, the production efficiency of the motor 300 is improved, and the cost of the motor 300 is reduced. Simultaneously, the number of the stator slots 116 is reasonably arranged, so that the cogging torque of the motor 300 can be reduced, and the use performance of the motor 300 is further improved.

Example 3:

as shown in fig. 2 and 4, the present embodiment provides a motor 300, and in addition to the technical features of any of the above embodiments, the present embodiment further includes the following technical features.

The stator poles 114 include a first stator pole 1142, a second stator pole 1144, and a third stator pole 1146, which are sequentially adjacently disposed. The stator 100 also includes winding coils 120, the winding coils 120 including a first phase winding coil 122, a second phase winding coil 124, and a third phase winding coil 126. The first phase winding coil 122 is wound around the first stator pole 1142 and sequentially wound around the nth stator pole 114 from the first stator pole 1142. The second phase winding coil 124 is wound around the second stator pole 1144 and sequentially wound around the nth stator pole 114 from the second stator pole 1144. The third phase winding coil 126 is wound around the third stator pole 1146, and sequentially wound around the nth stator pole 114 from the third phase winding coil 126. Wherein the value of N is an integral multiple of 3.

The winding coil 120 is wound over the stator pole 114, wherein a current inflow direction 1202 and a current outflow direction 1204 of the winding coil 120 are shown in fig. 3. The reliability of the operation of the motor 300 is improved by winding the three-phase different winding coils 120 on the stator poles 114.

Specifically, the first phase winding coil 122, the second phase winding coil 124, and the third phase winding coil 126 are respectively wound on one third of the stator poles 114, and it is understood that the number of the first stator poles 1142, the second stator poles 1144, and the third stator poles 1146 is respectively 10. As shown in fig. 2, for convenience of description, the present embodiment defines three adjacent stator poles 114 as a first stator pole 1142, a second stator pole 1144, and a third stator pole 1146. The first stator pole 1142, the second stator pole 1144, and the third stator pole 1146 may be any three adjacent stator poles 114 on the stator core 110. The present embodiment does not limit the position thereof.

Through the above winding manner, in the present embodiment, only one phase of winding coil 120 is wound on each stator pole 114, and the winding coils 120 on adjacent stator poles 114 are different and the same, so that mutual influence of magnetic fields generated after the winding coils 120 are energized is avoided, and the stability of the motor 300 is improved.

It can be understood that, the present embodiment may also set the number of turns of the winding coil 120 wound on the stator pole 114 according to the user's requirement, so as to achieve the purpose of controlling the magnetic field intensity generated by the stator 100, thereby improving the flexibility of the motor 300.

The winding coil 120 may be copper metal to improve the conductivity of the winding coil 120 and further improve the performance of the motor 300. The winding coil 120 may also be aluminum metal, reducing the cost of the motor 300.

Example 4:

as shown in fig. 5 and 6, the present embodiment provides a motor 300, and in addition to the technical features of any of the above embodiments, the present embodiment further includes the following technical features.

The stator core 110 is formed by splicing at least two stacked bodies 150, and each stacked body 150 includes at least two stacked stator lamination sheets 152.

It is understood that the stack 150 in the present embodiment may have a curved arc-like structure. The stator core 110 is formed by splicing at least two stacked bodies 150, so that the stator core 110 is convenient to machine and form, the production efficiency of the motor 300 is further improved, and the cost of the motor 300 is reduced. As shown in fig. 7, the stacked body 150 includes at least two stacked stator laminations 152, and a person skilled in the art can set the number of the stator laminations 152 according to actual requirements to adjust the thickness of the stacked body 150, so as to improve the applicability of the stator core 110.

In some embodiments of the present embodiment, at least two stacks 150 are detachably connected by means of a snap, a sliding groove, or the like, so as to increase the assembly speed of the stacks 150 and facilitate the maintenance and replacement of the stator core 110. The number of stator poles 114 on each stack 150 may or may not be the same.

It can be understood that the number of the stator lamination sheets 152 constituting the at least two stacks 150 of the stator core 110 is the same, so that the thicknesses of the at least two stacks 150 are the same, and the regularity of the overall structure of the stator core 110 is improved.

Example 5:

as shown in fig. 6 and 8, the present embodiment provides a motor 300, and in addition to the technical features of any of the above embodiments, the present embodiment further includes the following technical features.

The number of stacks 150 is 10, and any stack 150 includes 3 stator poles 114.

The number of the stacked bodies 150 in the embodiment is 10, so that the excessive bending radian of the stacked bodies 150 is avoided, the molding and assembling are facilitated, and the production efficiency of the stator core 110 is improved. And any stack 150 includes 3 stator poles 114, it can be understood that the stator poles 114 are uniformly distributed on the stack 150, which improves the structural regularity of the stack 150, facilitates the processing and forming of the stack 150, and reduces the cost of the motor 300.

Example 6:

as shown in fig. 2, the present embodiment provides a motor 300, and in addition to the technical features of any one of the above embodiments, the present embodiment further includes the following technical features.

The stator 100 further includes a winding coil 120 and an insulating member 130. The winding coil 120 is wound around the stator pole 114. The insulating member 130 is provided between the stator pole 114 and the winding coil 120.

In this embodiment, the insulating member 130 is disposed on the stator pole 114, and the winding coil 120 is wound on the insulating member, so as to insulate the winding coil 120 and the stator pole 114, thereby ensuring the normal operation of the motor 300.

It will be appreciated that the insulating member 130 may be rubber insulation, plastic insulation, or insulating varnish, among others, reducing the cost of the motor 300.

In some embodiments of this embodiment, the insulating member 130 may be an integrally formed structure, which facilitates processing of the insulating member 130 and improves production efficiency.

Example 7:

as shown in fig. 2 and 3, the present embodiment provides a motor 300, and in addition to the technical features of any of the above embodiments, the present embodiment further includes the following technical features.

The insulating member 130 has an integral structure that covers the surface of the stator pole 114. Or the insulating member 130 is assembled from at least two split sub-members 132.

In this embodiment, the insulating member 130 may be coated on the surface of the stator magnetic pole 114, so as to improve the insulating effect of the insulating member 130, and further improve the stability of the motor 300. The insulating member 130 may also be formed by splicing two split sub-members 132, which facilitates the forming and assembling of the insulating member 130, and improves the production efficiency of the motor 300. Specifically, the split sub-member 132 includes a first split sub-member 134 and a second split sub-member 136, and the first split sub-member 134 and the second split sub-member 136 are engaged with each other or bonded to each other to cover the surface of the stator pole 114.

Example 8:

as shown in fig. 2, the present embodiment provides a motor 300, and in addition to the technical features of any one of the above embodiments, the present embodiment further includes the following technical features.

The stator 100 also includes a reinforcement portion 140. The stator core 110 has a ring shape, and the reinforcing portion 140 is provided on the inner periphery of the stator core 110.

In this embodiment, the reinforcing portion 140 is disposed on the inner periphery of the stator core 110, so as to reinforce the stator core 110, avoid the stator core 110 from being broken or bent, improve the stability of the motor 300, and prolong the service life of the motor 300.

It can be understood that the reinforcing portion 140 and the stator core 110 are integrated, which facilitates the processing and forming of the stator core 110, and simultaneously improves the reinforcing effect on the stator core 110, thereby improving the use performance of the motor 300.

In some embodiments of the present embodiment, the reinforcing portions 140 may have a rectangular, triangular or hill-like structure, and the shapes of the reinforcing portions 140 on the same stator core 110 may be the same or different, so as to improve the applicability of the stator 100.

Example 9:

as shown in fig. 2, the present embodiment provides a motor 300, and in addition to the technical features of any one of the above embodiments, the present embodiment further includes the following technical features.

A plurality of reinforcing parts 140 are arranged at intervals along the inner periphery of the stator core 110.

The reinforcing parts 140 are arranged at intervals along the inner periphery of the stator core 110 in the present embodiment, reducing the volume and the occupied space of the stator core 110.

In some embodiments of the present embodiment, the reinforcing parts 140 may be uniformly spaced along the inner periphery of the stator core 110, so as to improve the structural regularity of the stator core 110 and facilitate the processing and forming of the stator core 110. In other embodiments of the present embodiment, the reinforcing portions 140 may be disposed at intervals along the inner periphery of the stator core 110, so as to reinforce the stator core 110 in a targeted manner, thereby improving the applicability of the stator core 110.

Example 10:

as shown in fig. 2, the present embodiment provides a motor 300, and in addition to the technical features of any one of the above embodiments, the present embodiment further includes the following technical features.

At least a portion of the edge of the reinforcement 140 is curved.

In this embodiment, at least a portion of the edge of the reinforcing portion 140 is arc-shaped, which facilitates the assembly of the stator core 110 with other components, thereby improving the production efficiency of the motor 300.

In some embodiments of the present embodiment, the reinforcing portions 140 have the same size, so as to improve the structural regularity of the stator core 110 and facilitate the processing and molding of the stator core 110. In other embodiments of the present embodiment, the reinforcing portions 140 are different in size to reinforce the stator core 110 in a targeted manner, so as to improve the applicability of the stator core 110.

Example 11:

as shown in fig. 9, the present embodiment provides a motor 300, and in addition to the technical features of any of the above embodiments, the present embodiment further includes the following technical features.

The rotor 200 includes a magnetically permeable ring 210 and a permanent magnet 220. A flux ring 210 surrounds the stator 100. The permanent magnet 220 is disposed on the flux ring 210 and includes rotor poles 222.

While the magnetic conductive ring 210 surrounds the stator 100 in this embodiment, it is understood that the diameter of the magnetic conductive ring 210 is larger than the diameter of the stator core 110 to enable at least a portion of the stator 100 to be disposed within the rotor 200.

The permanent magnet 220 and the rotor magnetic pole 222 are disposed on the magnetic conductive ring 210, and the rotor 200 can generate current under the action of the rotating magnetic field through the permanent magnet 220 and the rotor magnetic pole 222, so as to rotate under the action of the rotating magnetic field of the rotor 200.

It is understood that the permanent magnet 220 and the rotor pole 222 may be fixedly connected to the magnetic conductive ring 210 to improve the stability of the rotor 200. The permanent magnet 220 and the rotor magnetic pole 222 may also be detachably connected to the magnetic conductive ring 210 by a slide rail or a snap, which facilitates maintenance of the rotor 200.

Example 12:

as shown in fig. 9, the present embodiment provides a motor 300, and in addition to the technical features of any of the above embodiments, the present embodiment further includes the following technical features.

Rotor 200 also includes a hub frame 230. The hub frame 230 and the magnetic conductive ring 210 enclose an accommodating space 240, and at least a portion of the stator 100 is disposed in the accommodating space 240.

In this embodiment, at least a portion of the stator 100 is disposed in the accommodating space 240 surrounded by the hub frame 230 and the magnetic conductive ring 210, so that the rotating magnetic field generated by the stator 100 is cut by the rotor 200, thereby achieving the rotation of the rotor 200 relative to the stator 100. The hub frame 230 is used for supporting the permanent magnet 220 and the rotor magnetic pole 222, so as to prevent the permanent magnet 220 and the rotor magnetic pole 222 from shaking relative to the magnetic conductive ring 210 when the rotor 200 rotates, which may affect the operation of the motor 300.

It is understood that the hub frame 230 may be made of rubber or plastic, etc. to reduce the weight of the rotor 200 and the cost of the motor 300. The hub frame 230 may be made of metal or alloy, which improves the stability of the motor 300.

Example 13:

as shown in fig. 9, the present embodiment provides a motor 300, and in addition to the technical features of any of the above embodiments, the present embodiment further includes the following technical features.

The hub frame 230 and the magnetic ring 210 are made of the same material and have an integrated structure, or the hub frame 230 and the magnetic ring 210 are made of different materials and have a split structure.

In this embodiment, the hub frame 230 and the magnetic conductive ring 210 may be integrally formed, and the two are made of the same material, so as to facilitate the machining of the rotor 200 and improve the stability of the motor 300. The hub frame 230 and the magnetic conductive ring 210 can also be detachable structures, and the two are made of different materials, so that the rotor 200 can be conveniently installed and maintained, and the cost of the motor 300 can be reduced.

Example 14:

as shown in fig. 1 and 9, the present embodiment provides a motor 300, and in addition to the technical features of any of the above embodiments, the present embodiment further includes the following technical features.

The thickness of the stator core 110 ranges from 12 mm to 30 mm. The yoke portion 112 of the stator core 110 has an inner diameter ranging from 140 mm to 220 mm. The width of the yoke portion 112 of the stator core 110 ranges from 4 mm to 12 mm. The length of the stator pole 114 ranges from 18 mm to 40 mm. The thickness of the flux ring 210 of the rotor 200 ranges from 1.5 mm to 5 mm.

In some embodiments of the present embodiment, the thickness of the stator core 110 ranges from 18 mm to 22 mm. The yoke portion 112 of the stator core 110 has an inner diameter ranging from 170 mm to 200 mm. The width of the yoke portion 112 of the stator core 110 ranges from 6 mm to 9 mm.

In the embodiment, the thickness of the stator core 110 ranges from 12 mm to 30 mm, so that the stator core 110 is prevented from being too thin, the strength of the stator 100 is reduced, or the stator core 110 is too thick, and the cost of the motor 300 is prevented from being increased. The diameter of the yoke 112 ranges from 140 mm to 220 mm, so that the yoke 112 is prevented from having an excessively large diameter, which causes the stator 100 not to be placed in the accommodating space 240, or the yoke 112 has an excessively small diameter, which causes an excessively large gap between the stator 100 and the rotor 200, which affects the operation of the motor 300. The width of the yoke 112 ranges from 4 mm to 12 mm, which avoids the yoke 112 being too narrow to carry the stator poles 114 or the yoke 112 being too wide, increasing the cost of the motor 300. The length of the stator pole 114 ranges from 18 mm to 40 mm, which avoids the stator pole 114 being too long, increasing the cost of the motor 300, or the stator pole 114 being too short, reducing the winding space of the winding coil 120. The thickness of the magnetic conductive ring 210 of the rotor 200 is in a range of 1.5 mm to 5 mm, so as to avoid that the magnetic conductive ring 210 is too narrow to bear the permanent magnet 220, the rotor magnetic pole 222, and the like, or that the magnetic conductive ring 210 is too wide, which increases the weight and cost of the motor 300.

Example 15:

as shown in fig. 10, the present embodiment provides an electrical appliance 400, which includes the motor 300 according to any of the above embodiments, and the motor 300 is used to drive the electrical appliance 400 to work, so that all the beneficial effects of any of the above embodiments are achieved, and no further description is provided herein.

It is understood that the electric appliance 400 in the present embodiment may be an electric appliance such as a washing machine, an electric fan, or an air conditioner.

Example 16:

when the motor rotates, the stator magnetic poles and the stator slots of the stator respectively generate attractive force with the rotor, and the attractive force is different in magnitude, so that the motor generates cogging torque. The larger the cogging torque is, the larger vibration or noise generated by the motor in the rotating process is, and the operation of the motor is influenced.

In the related art, the cogging torque of the motor is reduced by increasing the number of unit motors, namely, by increasing the greatest common divisor of the number of the stator magnetic poles and the number of the rotor magnetic poles under the condition that the ratio of the number of the stator magnetic poles to the number of the rotor magnetic poles is kept to be 3: 4. However, as the number of unit motors increases, the number of stator slots also increases. Specifically, in the related art, 33 stator slots and 44 rotor poles are adopted, or 36 stator slots and 48 rotor poles are adopted, and in such a structure, the number of stator slots of the motor is too large, so that the stator slots become small, the winding stroke and the winding time of the winding coil 120 are long, and the motor cost is increased.

As shown in fig. 1 and 2, in order to ensure a reasonable number of unit motors and control the winding stroke and winding time of the winding coil 120, the present embodiment provides a motor 300, and the motor 300 includes a stator 100. The stator 100 includes a stator core 110 made of a magnetic conductive material, and the stator core 110 includes an annular yoke 112 and 30 stator poles 114 on the yoke 112, and the stator poles 114 radially extend around the yoke 112 in a circumferential direction and are arranged at intervals on an outer circumferential surface of the annular yoke 112. The stator poles 114 and the annular yoke 112 together form stator slots 116 for receiving the winding coils 120.

As shown in fig. 3 and 4, the winding coils 120 are three-phase winding coils, each phase winding includes a plurality of coils, and the coils are arranged on the magnetic pole cores of one third of the stator poles 114, so that each winding coil 120 is wound on the magnetic pole core of only one stator pole 114, and the magnetic pole cores are associated with only one phase winding, and the winding coils 120 associated with any adjacent three magnetic pole cores are different in phase from each other, thereby preventing the winding coils 120 of different phases from affecting each other after being electrified. The motor 300 further includes an insulating member 130. The stator poles 114 are insulated from the winding coils 120 to prevent current from flowing to the stator core 110 and affecting the operation of the motor 300.

The rotor 200 is concentric with the stator 100 and disposed outside the stator 100, wherein the number of the rotor poles 222 is 40. Through the above design, compared with the motor 300 with the ratio of the number of the rotor magnetic poles to the number of the stator magnetic poles 114 being 4:3 in the related art, the number of the unit motors of the motor 300 in the embodiment is larger, the cogging torque is smaller, and the number of the magnetic poles makes the stroke of the winding coil 120 shorter, thereby saving the production time.

The yoke 112 of the present embodiment has a circular ring-shaped structure or an approximately circular ring structure formed concentrically with the inner circumference and the outer circumference. In order to enhance the strength, the inner circumference of the yoke part 112 is in an arc-shaped structure, so that the area of a partial end face is expanded, the coating strength is enhanced, the structural strength is higher, and a required structure is conveniently added on the end face of the part.

The thickness of the stator core 110 in this embodiment is 12 mm to 30 mm, preferably 18 mm to 22 mm. The inner diameter of the yoke 112 is 140 mm to 220 mm. The inner diameter of the yoke 112 is 170 mm to 200 mm. The yoke 112 has a width of 4 mm to 12 mm. On this basis, the width of the yoke 112 is 6 mm to 9 mm. The stator poles 114 extend outwardly from the yoke 112 for a length of 18 mm to 40 mm.

As shown in fig. 5, the stator core 110 is a stack 150 comprising at least one lamination. The stacked body 150 is constituted by a plurality of stator lamination pieces 152.

In some embodiments of the present embodiment, as shown in fig. 7, the stator lamination 152 has a straight strip structure, and the stacked body 150 is formed by winding the stator lamination 152 in a spiral line to form the entire stacked body 150.

As shown in fig. 6, the stack 150 includes a plurality of stacks 150 joined at ends thereof, wherein each stack 150 includes one or more yoke 112 sections, and one or more stator poles 114.

In other embodiments of this embodiment, the stator core 110 includes 10 segments, each of the 10 segments having 3 radially extending stator poles 114.

It is to be understood that the stator laminations 152 may be of an integrally stamped sector configuration, as shown in fig. 8. The stator laminations 152 may also be straight bar structures as shown in fig. 6. Each stack 150 is formed by stacking and rolling a straight strip-shaped stator lamination 152 or by stacking sector-shaped stator laminations 152.

The insulating member 130 in this embodiment is a plastic material made by an over-molding die, which is integrally over-molded to the stator core 110. The insulating member 130 is divided into an upper and a lower insulating mechanisms, and is fastened to the stator core 110 to insulate the stator core 110 from the winding coil 120.

Fig. 9 is a schematic structural view of the rotor 200. To optimize the rotor 200 structure, the rotor 200 comprises a magnetically permeable ring 210 of magnetically permeable material, a plurality of permanent magnets 220 having two lateral edges, and a hub frame 230. The hub frame 230 retains the plurality of permanent magnets 220 in the magnetically permeable ring 210. In this embodiment, the width between the inner and outer circular surfaces of the magnetic conductive ring 210 is between 1.5 mm and 5 mm for better output performance.

In some embodiments of the present embodiment, the hub frame 230 and the magnetic conductive ring 210 are an integral structure of the same steel plate material. The structural strength can be enhanced. In other embodiments of this embodiment, the hub frame 230 is plastic, which makes the motor 300 less costly.

To sum up, the utility model discloses beneficial effect does:

1. the number of the stator magnetic poles and the number of the rotor magnetic poles are more reasonable, so that the excessive number of stator slots is avoided, the time for winding a winding coil on the stator magnetic poles and the winding stroke are saved, and the cost of the motor is reduced.

2. The number of the stator magnetic poles and the number of the rotor magnetic poles are optimal, and the motor efficiency under the low-speed load working condition (such as the washing working condition of the washing machine) and the motor efficiency under the high-speed weak magnetic working condition (such as the dehydration working condition of the washing machine) are considered.

3. The cogging torque of the motor is reduced, and the use performance of the motor is improved.

In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific 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 invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

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 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 (17)

1. An electric machine, comprising:

a stator including a stator core including stator poles;

a rotor provided with rotor magnetic poles that are fitted with the stator magnetic poles;

the number of the stator magnetic poles ranges from 28 to 36, and the number of the rotor magnetic poles ranges from 37 to 48.

2. The electric machine of claim 1,

the number of the stator magnetic poles is 30, and the number of the rotor magnetic poles is 40.

3. The electric machine of claim 1, wherein the stator core further comprises:

a yoke portion;

the stator poles are arranged around the edge of the yoke and enclose stator slots with the yoke, the number of the stator slots being in the range of 28 to 36.

4. The electric machine of claim 3, wherein the number of stator slots is 30.

5. The electric machine of claim 1, wherein the stator poles comprise first, second and third stator poles disposed adjacent in sequence, the stator further comprising a winding coil comprising:

a first phase winding coil wound around the first stator magnetic pole and sequentially wound around an nth stator magnetic pole from the first stator magnetic pole;

a second phase winding coil wound around the second stator pole and sequentially wound around an nth stator pole from the second stator pole;

a third phase winding coil wound around the third stator magnetic pole and sequentially wound around an nth stator magnetic pole from the third phase winding coil;

wherein the value of N is an integral multiple of 3.

6. The electric machine of claim 1, wherein the stator core is assembled from at least two stacks, any of the stacks comprising at least two stacked stator laminations.

7. The machine of claim 6 wherein the number of stacks is 10, any stack comprising 3 stator poles.

8. The electric machine of any of claims 1 to 7, wherein the stator further comprises:

a winding coil wound around the stator pole;

and an insulating member provided between the stator magnetic pole and the winding coil.

9. The electric machine of claim 8,

the insulating part has an integral structure coated on the surface of the stator magnetic pole; or

The insulating component is formed by splicing at least two split sub-components.

10. The electric machine of any of claims 1 to 7, wherein the stator further comprises:

the reinforcing part, the shape of stator core is the annular, the reinforcing part is located the inside periphery of stator core.

11. The electric machine of claim 10 wherein a plurality of said reinforcements are spaced along the inner periphery of said stator core.

12. The machine of claim 10 wherein at least a portion of the edges of the reinforcement are arcuate.

13. The electric machine according to any one of claims 1 to 7, wherein the rotor comprises:

a magnetically conductive ring surrounding the stator;

and the permanent magnet is arranged on the magnetic conduction ring and comprises the rotor magnetic pole.

14. The electric machine of claim 13, wherein the rotor further comprises:

the hub frame and the magnetic conductive ring surround an accommodating space, and at least part of the stator is arranged in the accommodating space.

15. The electric machine of claim 14,

the hub frame and the magnetic conductive ring are made of the same material and have an integrated structure; or

The hub frame and the magnetic conductive ring are made of different materials and have a split structure.

16. The electric machine according to any of claims 1 to 7,

the thickness of the stator core ranges from 12 mm to 30 mm; and/or

An inner diameter of a yoke portion of the stator core ranges from 140 mm to 220 mm; and/or

A yoke portion of the stator core has a width ranging from 4 mm to 12 mm; and/or

The length of the stator pole ranges from 18 mm to 40 mm; and/or

The thickness range of the magnetic conduction ring of the rotor is 1.5 mm to 5 mm.

17. An electrical appliance, comprising:

an electric machine as claimed in any one of claims 1 to 16, for driving the appliance in operation.

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