CN216489941U - Stator structure, motor and electrical equipment - Google Patents

Abstract

The utility model provides a stator structure, motor and electrical equipment, stator structure includes: a circular ring part; salient poles are arranged on the inner circumferential wall of the circular ring part and extend along the axial direction of the circular ring part; the projection area of the salient pole in the axial direction of the circular ring part is larger than the cross section area of the salient pole. The utility model discloses optimize the distribution of salient pole in ring portion, need not additionally to increase the quantity of salient pole, more need not additionally to increase all the other structures, on the torque ripple's that reduces the motor basis, can not lead to the cost-push of motor, have certain cost advantage.

Description

Stator structure, motor and electrical equipment

Technical Field

The utility model relates to a motor field particularly, relates to a stator structure, motor and electrical equipment.

Background

In the related art, the torque ripple of the permanent magnet motor is reduced by means of rotor oblique poles and the like; however, the rotor poles are inclined to complicate the shape of the permanent magnets and also increase the cost of the motor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least.

Therefore, the utility model discloses the first aspect provides a stator structure.

The utility model discloses the second aspect provides a motor.

The utility model discloses the third aspect provides an electrical equipment.

The utility model discloses a first aspect provides a stator structure, include: a circular ring part; salient poles are arranged on the inner circumferential wall of the circular ring part and extend along the axial direction of the circular ring part; the projection area of the salient pole in the axial direction of the circular ring part is larger than the cross section area of the salient pole.

The utility model provides a stator structure includes ring portion and salient pole. The salient poles protrude out of the inner circumferential wall of the circular ring part and extend along the axial direction of the circular ring part. In addition, the projection area of the salient pole in the axial direction of the annular part is larger than the cross-sectional area of the salient pole.

Particularly, the utility model provides a stator structure optimizes the shape of salient pole for the salient pole is greater than the cross sectional area of salient pole at the axial projected area of ring portion. Specifically, the salient poles may be disposed obliquely with respect to the axial direction of the circular ring portion, or the salient poles may be designed in a segmented manner in the axial direction of the circular ring portion, and the salient poles in different segments are distributed in a staggered manner. Therefore, in the using process of the motor applying the stator structure, the adjusting effect of the salient pole on the magnetic field can be obviously improved, and the motor applying the stator structure has lower torque pulsation; and the torque of the motor with the stator structure can be ensured not to be influenced, and the stability of the motor in the operation process is further improved.

Furthermore, the utility model discloses only need optimize the distribution of salient pole in ring portion, need not additionally to increase the quantity of salient pole, more need not additionally to increase all the other structures. Make the utility model discloses on the basis of the torque ripple that reduces the motor, can not lead to the cost-push of motor, have certain cost advantage.

Specifically, the utility model provides a stator structure can be applied to two air gap permanent-magnet machine to can regard as two air gap permanent-magnet machine's outer stator to use. In use, the stator structure is not provided with windings.

In some possible designs, the extending direction of the salient poles is arranged obliquely with respect to the axial direction of the annular ring portion.

In this design, the extending direction of the salient poles is disposed obliquely with respect to the axial direction of the annular portion. That is, compare in the correlation technique along the salient pole of ring portion axial extension, the utility model discloses improve the extending direction of salient pole for the extending direction of salient pole is compared in the axial slope setting of ring portion, makes the salient pole compare in the axial slope setting of ring portion. Therefore, in the using process of the motor with the stator structure, the torque pulsation of the motor can be obviously reduced, and the running stability of the motor is improved.

In some possible designs, the inner circumferential wall of the circular ring portion is provided with a section of salient pole in the axial direction of the circular ring portion.

In this design, the inner circumferential wall of the annular portion is provided with a segment of salient pole in the axial direction of the annular portion. That is, in the axial of ring portion, the utility model discloses be provided with one section complete salient pole to this section salient pole is compared in the axial slope setting of ring portion. Particularly, in the axial direction of the circular ring part, the salient pole is of a complete structure, the processing difficulty of the stator structure can be reduced, the processing difficulty of the stator structure is reduced on the basis of reducing the torque pulsation of a motor applying the stator structure, and the processing efficiency of the stator structure is improved.

In some possible designs, the inner circumferential wall of the circular ring portion is provided with at least two segments of salient poles in the axial direction of the circular ring portion.

In the design, at least two sections of salient poles are arranged on the inner circumferential wall of the circular ring part in the axial direction of the circular ring part; wherein, at least two ends salient poles are distributed at intervals along the axial direction of the circular ring part. That is, in the axial of ring portion, the utility model discloses set up two sections at least salient poles that are interrupted to every section salient pole all compares in the axial slope setting of ring portion. Particularly, in the axial direction of the circular ring part, the salient pole is of an intermittent structure, so that the requirement of the stator structure on raw materials can be reduced, the raw material cost of the stator structure is reduced on the basis of reducing the torque pulsation of a motor applying the stator structure, and the raw material utilization rate of the stator structure is improved.

In some possible designs, in the axial direction of the circular ring part, the inclination directions of the two adjacent salient poles are the same compared with the axial direction of the circular ring part.

In this design, the inner circumferential wall of the annular portion is provided with at least two stages of salient poles in the axial direction of the annular portion. In addition, the inclination directions of the two adjacent salient poles are the same compared with the axial direction of the annular part. Thus, in the axial direction of the circular ring part, two adjacent sections of the salient poles are inclined in a straight line shape. At the moment, the inclination directions of the two adjacent salient poles are the same compared with the axial direction of the circular ring part, so that the whole structure of the stator structure is simple, and the processing difficulty of the stator structure is reduced on the basis of reducing the torque pulsation of a motor applying the stator structure.

In some possible designs, in the axial direction of the circular ring part, the inclination directions of the two adjacent salient poles are opposite compared with the axial direction of the circular ring part.

In this design, the inner circumferential wall of the annular portion is provided with at least two stages of salient poles in the axial direction of the annular portion. In addition, the inclination of the two adjacent salient poles is opposite compared with the axial direction of the circular ring part. Thus, two adjacent salient poles are inclined in a V shape in the axial direction of the annular part. At the moment, the inclination directions of the two adjacent salient poles are opposite compared with the axial direction of the circular ring part, so that the distribution of the salient poles on the circular ring part is further optimized, and the processing difficulty of the stator structure is further reduced.

In some possible designs, at least two sections of salient poles are arranged on the inner circumferential wall of the circular ring part in the axial direction of the circular ring part, and two adjacent sections of salient poles are distributed in a staggered mode.

In the design, at least two sections of salient poles are arranged on the inner circumferential wall of the circular ring part in the axial direction of the circular ring part, and the salient poles at two adjacent ends are distributed in a staggered mode. That is, in the axial of ring portion, the utility model discloses set up two sections at least salient poles that are interrupted to guarantee the distribution of misplacing in the circumference of the early ring portion of two sections adjacent salient poles, make between the adjacent both ends salient pole discontinuous. Thus, the motor applying the stator structure has lower torque pulsation, and the torque of the motor is not influenced.

In some possible designs, at least one segment of the salient poles extends in an axial direction of the circular portion.

In the design, at least two sections of salient poles are arranged on the inner peripheral wall of the circular ring part in the axial direction of the circular ring part, and the salient poles at two adjacent ends are distributed in a staggered manner; and at least one segment of the salient pole extends along the axial direction of the circular ring part. That is, in this design, the salient poles extending in the axial direction of the circular ring portion may be arranged in a shifted manner. In this way, the motor applying the stator structure can be ensured to have lower torque ripple, and the torque of the motor is ensured not to be influenced. In addition, the processing difficulty of the stator structure can be further reduced.

In some possible designs, the inner circumferential wall of the circular ring portion is provided with at least two salient poles with a recess therebetween in a circumferential direction of the circular ring portion.

In this design, the inner circumferential wall of the circular ring portion is provided with at least two salient poles in the circumferential direction of the circular ring portion. In addition, at least two salient poles are distributed at intervals along the circumferential direction of the circular ring part, and a concave part is formed between every two adjacent salient poles.

The utility model discloses the second aspect provides a motor, include: if the utility model discloses stator structure, rotor subassembly of first aspect set up in stator structure's periphery or interior week.

The utility model provides a motor, including stator structure and the utility model discloses the stator structure of the first aspect. Therefore, the motor has all the advantages of the stator structure, has lower torque pulsation and has higher torque.

In some possible designs, the stator structure is disposed at an outer periphery of the rotor assembly, and the motor further includes: the stator component is arranged on the inner side of the rotor component; a first air gap is formed between the stator structure and the rotor assembly, and a second air gap is formed between the rotor assembly and the stator assembly.

In the design, the rotor assembly is arranged at the periphery of the stator assembly, and the stator structure is arranged at the periphery of the rotor assembly; and, have the first air gap (outer air gap) between stator structure and the rotor subassembly, have the second air gap (interior air gap) between rotor subassembly and the stator module. In this way, the magnetic resistance and the harmonic magnetic field can be balanced by the first air gap and the second air gap, and the magnetic resistance and the harmonic magnetic field of the whole motor can be balanced.

Furthermore, in the radial direction of the stator structure, the size of the first air gap is smaller than that of the second air gap, and then the integral air gap flux density is adjusted through the two air gaps with different sizes, so that the magnetic resistance and the harmonic magnetic field are balanced, and the magnetic resistance and the harmonic magnetic field of the whole motor are balanced. Specifically, the ratio of the size of the first air gap to the size of the second air gap is greater than or equal to 0.03: 3, and 0.1 or less: 3, the above effect is optimal.

In some possible designs, the rotor assembly includes: the magnetic conduction blocks are distributed at the periphery of the stator assembly at intervals, and two adjacent magnetic conduction blocks are connected; and the permanent magnets are respectively arranged between the two adjacent magnetic conduction blocks, and the polarities of the two adjacent permanent magnets are opposite.

In this design, the rotor assembly includes a plurality of magnetically permeable blocks and a plurality of permanent magnets. The plurality of magnetic conduction blocks are distributed on the periphery of the stator assembly at intervals, and two adjacent magnetic conduction blocks are connected; the permanent magnets are respectively arranged between two adjacent magnetic conduction blocks; and the polarities of two adjacent permanent magnets are opposite to each other, so that a magnetism gathering effect is formed.

Further, two adjacent magnetic conduction blocks can be connected through a magnetic conduction part or a non-magnetic conduction part.

Further, the magnets may be arranged in a built-in spoke type magnet arrangement or a built-in V-shaped magnet arrangement.

In some possible designs, the stator assembly includes: the stator core comprises a plurality of stator main teeth, and a stator slot is formed between every two adjacent stator main teeth; the winding is arranged on the stator main tooth and positioned in the stator slot; the number Zr of the magnetic conduction blocks, the number Ns of the stator slots and the pole pair number Pa of the winding satisfy the following conditions: pa ═ Ns. + -. Zr/2 |.

In this design, the stator assembly includes a stator core and windings. The stator core comprises a plurality of stator main teeth arranged at intervals, and a stator slot is formed between every two adjacent stator main teeth; the winding is wound on the stator main teeth and positioned in the stator slots.

Further, the number Zr of the magnetic blocks, the number Ns of the stator slots, and the pole pair number Pa of the winding satisfy: pa ═ Ns. + -. Zr/2 |. Therefore, new harmonic components in the air gap flux density can be used as the working harmonic of the motor to provide output torque for the motor, so that the torque density of the motor is effectively improved, and the efficiency of the motor is further improved.

In some possible designs, the stator assembly further comprises: the stator main teeth are arranged on the stator main teeth, and grooves are formed between every two adjacent stator auxiliary teeth.

In this design, the stator assembly further includes at least two stator secondary teeth. At least two stator auxiliary teeth are arranged on the tooth shoe of the stator main tooth, and a groove is formed between every two adjacent stator auxiliary teeth. In this way, the stator secondary teeth can be used as a modulating component in addition to a magnetic conducting component, and the function of magnetic field modulation is realized. At this time, unlike the conventional permanent magnet motor employed in the related art (slot opening is small, air gap permeance is close to constant).

The utility model provides an among the motor, stator owner tooth splits into two at least stator auxiliary teeth for introduce more harmonic component in the air gap magnetic conductance. Thus, the performance of the motor is obviously improved. Moreover, the motor is simple in structure and convenient to process and manufacture, the cost of the motor is not obviously increased, and the motor does not generate large vibration and noise.

In some possible designs, the tooth shoes of adjacent stator main teeth have notches therebetween, and the notches communicate with the stator slots; in the circumferential direction of the stator core, the size of the notch is different from that of the groove.

In this design, there are notches between the tooth shoes of adjacent stator main teeth, the notches communicating with the stator slots to facilitate winding of the windings. Further, in the circumferential direction of the stator core, the size of the notch is different from the size of the groove. Through setting up the size of recess and notch to be inequality, can change the even degree that the stator secondary tooth on all stator owner teeth distributes on the circumference, reduced the cycle number of air gap magnetic conductance, through reducing the air gap magnetic conductance cycle number, the magnetic density harmonic component that the modulation generated will increase, consequently can produce more work harmonics for motor output torque further promotes.

In some possible designs, the windings are wound around the body of the stator main teeth, or around the yoke of the stator main teeth.

In this design, the windings are wound onto the tooth body of the stator main teeth, and may also be wound onto the yoke portion of the stator main teeth. When the winding is wound to the yoke portion of the stator main teeth, the end portion of the winding can be shortened, thereby effectively balancing the contradiction between the overlong end portion of the winding and the high winding factor of the motor. When the winding is wound on the tooth body of the stator main tooth, the winding difficulty of the winding can be reduced, and the improvement amplitude of the motor can be reduced.

In some possible designs, the windings are concentrated windings.

In the design, the winding is centralized winding, so that winding is facilitated, and the production efficiency of the motor is further improved.

The utility model discloses the third aspect provides an electrical equipment, include: an electric machine according to the second aspect of the present invention.

The utility model provides an electrical equipment, include the motor like above-mentioned second aspect. Thus, the overall benefits of the motor described above are achieved and will not be discussed in detail here.

Specifically, the utility model provides an electrical equipment can be products such as refrigerator, washing machine, air conditioner.

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 one of the schematic structural views of a stator structure according to an embodiment of the present invention;

fig. 2 is a second schematic structural view of a stator structure according to an embodiment of the present invention;

fig. 3 is a third schematic structural view of a stator structure according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a motor according to an embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of the motor shown in FIG. 4 at A;

FIG. 6 is an enlarged view of a portion of the motor shown in FIG. 4 at B;

fig. 7 is a schematic diagram illustrating a relationship between an inclination angle of the salient poles in the extending direction in comparison with the axial direction of the annular portion, and torque ripple and torque of the motor according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 6 is:

100 stator structure, 102 circular ring, 104 salient pole, 106 recess, 200 stator assembly, 202 stator core, 204 stator primary tooth, 206 stator slot, 208 winding, 210 stator secondary tooth, 212 groove, 214 slot, 300 rotor assembly, 302 magnetic conduction block, 304 permanent magnet, 400 first air gap, 500 second air gap.

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 invention 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 stator structure 100, a motor and an electrical apparatus provided according to some embodiments of the present invention are described below with reference to fig. 1 to 7. In fig. 1, 2, and 3, a dotted line L indicates the axial direction of the circular portion 102. In fig. 7, the abscissa indicates an inclination angle of the extending direction of the salient poles 104 with respect to the axial direction of the annular portion 102 in the case where the extending direction of the salient poles 104 is disposed obliquely with respect to the axial direction of the annular portion 102; the ordinate on the left and line L1 represent the torque ripple of the motor; the ordinate on the right and the line L2 represent the torque of the motor. Furthermore, the cross-sectional area of the salient pole 104 in the present invention means: the salient poles 104 are cut with a plane perpendicular to the axial direction of the salient poles 104, the cross-sectional area of the salient poles 104.

As shown in fig. 1, 2 and 3, a first embodiment of the present invention provides a stator structure 100, which includes a circular ring portion 102 and salient poles 104. The salient poles 104 are disposed to protrude from the inner circumferential wall of the circular ring portion 102 and extend in the axial direction of the circular ring portion 102. The projected area of the salient pole 104 in the axial direction of the annular portion 102 is larger than the cross-sectional area of the salient pole 104.

In particular, the present invention proposes that the stator structure 100 optimizes the shape of the salient poles 104 such that the projected area of the salient poles 104 in the axial direction of the annular ring portion 102 is larger than the cross-sectional area of the salient poles 104. Specifically, the salient poles 104 may be disposed obliquely with respect to the axial direction of the circular ring part 102, or the salient poles 104 may be designed in a segmented manner in the axial direction of the circular ring part 102, and the salient poles 104 in different segments are distributed in a staggered manner.

Thus, as shown in fig. 7, in the using process of the motor applying the stator structure 100, the adjusting effect of the salient poles 104 on the magnetic field can be obviously improved, so that the motor applying the stator structure 100 has lower torque ripple; and the torque of the motor applying the stator structure 100 can be ensured not to be influenced, thereby improving the stability of the motor in the operation process.

In addition, the utility model discloses only need optimize the distribution of salient pole 104 in ring portion 102, need not additionally to increase the quantity of salient pole 104, more need not additionally to increase all the other structures. Make the utility model discloses on the basis of the torque ripple that reduces the motor, can not lead to the cost-push of motor, have certain cost advantage.

Specifically, the utility model provides a stator structure 100 can be applied to two air gap permanent-magnet machine to can regard as the outer stator of two air gap permanent-magnet machine to use. In use, the stator structure 100 is not provided with windings 208. Therefore, the stator structure 100 of the present invention does not have a winding process during use. By the design, on the basis of ensuring the reduction of the torque pulsation of the motor, the assembly difficulty of the motor cannot be improved, particularly the difficulty of a winding process cannot be improved, and the cost of the motor applying the stator structure 100 cannot be increased.

Further, the present invention is an improvement to the stator structure 100 of an electric machine, and the stator structure 100 neither provides the windings 208 nor requires the permanent magnets 304 to be installed. Therefore, compare in the related art and carry out the mode of improving to the rotor subassembly, the utility model discloses can not put forward more requirements to the structure of permanent magnet 304, can not lead to the assembly degree of difficulty promotion of permanent magnet 304 more, and then make the cost that should the motor of stator structure 100 can not increase.

The second embodiment of the present invention provides a stator structure 100, which further comprises:

as shown in fig. 1 and 2, the salient poles 104 are arranged to extend in a direction inclined with respect to the axial direction of the annular portion 102. That is, compare in the relevant art along the salient pole of ring portion axial extension, the utility model discloses improve the extending direction of salient pole 104 for the extending direction of salient pole 104 is compared in the axial tilt setting of ring portion 102, makes salient pole 104 compare in the axial tilt setting of ring portion 102. Therefore, in the using process of the motor applying the stator structure 100, the torque pulsation of the motor can be obviously reduced, and the running stability of the motor is improved.

The utility model discloses a third embodiment provides a stator structure 100, on the basis of the second embodiment, further:

as shown in fig. 1, the inner circumferential wall of the annular portion 102 is provided with a segment of salient pole 104 in the axial direction of the annular portion 102. That is, in the axial direction of the circular ring part 102, the present invention is provided with a section of complete salient pole 104, and the section of salient pole 104 is disposed in an inclined manner compared with the axial direction of the circular ring part 102. In particular, in the axial direction of the circular ring part 102, the salient pole 104 is a complete structure, which can reduce the processing difficulty of the stator structure 100, and further reduce the processing difficulty of the stator structure 100 and improve the processing efficiency of the stator structure 100 on the basis of reducing the torque ripple of the motor using the stator structure 100.

Therefore, in the present embodiment, the salient poles 104 are provided on the inner peripheral wall of the annular part 102, and the salient poles 104 continuously extend in the axial direction of the annular part 102, the salient poles 104 are of a complete one-segment structure, and the salient poles 104 are obliquely provided in comparison with the axial direction of the annular part 102, so as to ensure that the projection area of the salient poles 104 in the axial direction of the annular part 102 is larger than the cross-sectional area of the salient poles 104.

The fourth embodiment of the present invention provides a stator structure 100, which further comprises:

as shown in fig. 1, the inner circumferential wall of the annular portion 102 is provided with at least two stages of salient poles 104 in the axial direction of the annular portion 102; wherein, at least two ends of the salient poles 104 are distributed at intervals along the axial direction of the circular ring part 102. That is, in the axial direction of the circular ring part 102, the present invention provides at least two discontinuous salient poles 104, and each salient pole 104 is disposed in an inclined manner in comparison with the axial direction of the circular ring part 102. In particular, the salient poles 104 are discontinuous in the axial direction of the annular portion 102, which reduces the requirement of the stator structure 100 for raw materials, and further reduces the raw material cost of the stator structure 100 and improves the raw material utilization rate of the stator structure 100 on the basis of reducing the torque ripple of the motor to which the stator structure 100 is applied.

Therefore, in the present embodiment, the salient poles 104 are provided on the inner peripheral wall of the annular portion 102, and the salient poles 104 extend intermittently in the axial direction of the annular portion 102, the salient poles 104 are divided into at least two segments, and at least two segments of the salient poles 104 are disposed obliquely with respect to the axial direction of the annular portion 102, so as to ensure that the projected area of the salient poles 104 in the axial direction of the annular portion 102 is larger than the cross-sectional area of the salient poles 104.

The utility model discloses a fifth embodiment provides a stator structure 100, on the basis of fourth embodiment, further:

at least two stages of salient poles 104 are provided on the inner peripheral wall of the annular portion 102 in the axial direction of the annular portion 102. In addition, the two adjacent salient poles 104 are inclined in the same direction (not shown) in the axial direction of the annular portion 102. Thus, two adjacent salient poles 104 are inclined in a line in the axial direction of the annular portion 102. At this time, the inclination directions of the two adjacent salient poles 104 are the same as each other in comparison with the axial direction of the annular part 102, so that the overall structure of the stator structure 100 is simple, and the difficulty in processing the stator structure 100 is reduced on the basis of reducing the torque ripple of the motor to which the stator structure 100 is applied.

Therefore, in the present embodiment, the salient poles 104 are provided on the inner peripheral wall of the annular part 102, and the salient poles 104 extend intermittently in the axial direction of the annular part 102, the salient poles 104 are divided into at least two sections, and at least two sections of the salient poles 104 are inclined with respect to the axial direction of the annular part 102, and the inclination directions of two adjacent sections of the salient poles 104 with respect to the axial direction of the annular part 102 are the same, so that two adjacent sections of the salient poles 104 are inclined in a straight line shape, so as to ensure that the projection area of the salient poles 104 in the axial direction of the annular part 102 is larger than the cross-sectional area of the salient poles 104.

The utility model discloses a sixth embodiment provides a stator structure 100, on the basis of fourth embodiment, further:

as shown in fig. 2, at least two stages of salient poles 104 are provided on the inner circumferential wall of the annular portion 102 in the axial direction of the annular portion 102. In addition, the inclination of the two adjacent salient poles 104 is opposite to the inclination of the annular part 102 in the axial direction. Thus, the two adjacent salient poles 104 are inclined in a V shape in the axial direction of the annular portion 102. At this time, the inclination directions of the two adjacent salient poles 104 are opposite compared with the axial direction of the circular ring part 102, so as to further optimize the distribution of the salient poles 104 on the circular ring part 102, and further reduce the processing difficulty of the stator structure 100.

Therefore, in the present embodiment, the salient poles 104 are provided on the inner peripheral wall of the annular portion 102, and the salient poles 104 extend intermittently in the axial direction of the annular portion 102, the salient poles 104 are divided into at least two sections, and at least two sections of the salient poles 104 are inclined with respect to the axial direction of the annular portion 102, and the inclined directions of two adjacent sections of the salient poles 104 with respect to the axial direction of the annular portion 102 are different, so that two adjacent sections of the salient poles 104 are inclined in a V shape, so as to ensure that the projected area of the salient poles 104 in the axial direction of the annular portion 102 is larger than the cross-sectional area of the salient poles 104.

The utility model discloses a seventh embodiment provides a stator structure 100, on the basis of the first embodiment, further:

as shown in fig. 3, at least two stages of salient poles 104 are arranged on the inner circumferential wall of the annular part 102 in the axial direction of the annular part 102, and the salient poles 104 at two adjacent ends are distributed in a staggered manner. That is, in the axial of ring portion 102, the utility model discloses set up two sections at least salient poles 104 that are interrupted to guarantee that two sections adjacent salient poles 104 are distributed in the week of the early ring portion 102 of circumference dislocation, make between the adjacent both ends salient pole 104 not continuous. Thus, the motor to which the stator structure 100 is applied can be made to have lower torque ripple and it is ensured that the torque of the motor is not affected.

In this embodiment, further, as shown in fig. 3, in the axial direction of the annular part 102, the inner circumferential wall of the annular part 102 is provided with at least two sections of salient poles 104, and the salient poles 104 at two adjacent ends are distributed in a staggered manner; and, at least one segment of the salient pole 104 extends in the axial direction of the annular portion 102. That is, in this design, the salient poles 104 extending in the axial direction of the annular portion 102 may be provided in a shifted manner. In this way, it is also ensured that the motor to which the stator structure 100 is applied has lower torque ripple, and that the torque of the motor is not affected. Moreover, the processing difficulty of the stator structure 100 can be further reduced.

Therefore, in the present embodiment, the salient poles 104 are provided on the inner peripheral wall of the annular part 102, and the salient poles 104 extend intermittently in the axial direction of the annular part 102, the salient poles 104 are divided into at least two stages, and the salient poles 104 extending in the axial direction of the annular part 102 are arranged in a staggered manner, and the salient poles 104 extend in the axial direction of the annular part 102, so as to ensure that the projected area of the salient poles 104 in the axial direction of the annular part 102 is larger than the cross-sectional area of the salient poles 104.

On the basis of the first to seventh embodiments, further, as shown in fig. 1, 2 and 3, the inner peripheral wall of the annular portion 102 is provided with at least two salient poles 104 in the circumferential direction of the annular portion 102. Further, at least two salient poles 104 are spaced apart in the circumferential direction of the annular portion 102, and a concave portion 106 is formed between adjacent two salient poles 104.

On the basis of the first to seventh embodiments, further, as shown in fig. 1, 2 and 3, the circular ring portion 102 and the salient pole 104 are of an integral structure.

As shown in fig. 4, an eighth embodiment of the present invention provides an electric machine (not shown in the drawings) including a rotor assembly 300 and the stator structure 100 of any of the above embodiments.

Therefore, the present invention provides an electric machine including the stator structure 100 of any of the above embodiments. Therefore, the motor has all the advantages of the stator structure 100 of any of the above embodiments, has lower torque ripple, and has higher torque.

As shown in fig. 4, a ninth embodiment of the present invention provides a motor, further comprising:

as shown in fig. 5 and 6, the rotor assembly 300 is disposed at the outer periphery of the stator assembly 200, and the stator structure 100 is disposed at the outer periphery of the rotor assembly 300; furthermore, a first air gap 400 is formed between the stator structure 100 and the rotor assembly 300, and a second air gap 500 is formed between the rotor assembly 300 and the stator assembly 200. In this way, the reluctance and the harmonic magnetic field can be balanced by the first air gap 400 and the second air gap 500, so that the reluctance and the harmonic magnetic field of the whole motor can be balanced.

Further, in the radial direction of the stator structure 100, the size of the first air gap 400 is smaller than that of the second air gap 500, and then the overall air gap flux density is adjusted through the two air gaps with different sizes, so that the magnetic resistance and the harmonic magnetic field are balanced, and further the magnetic resistance and the harmonic magnetic field of the whole motor reach a balance. Specifically, the ratio of the size of the first air gap 400 to the size of the second air gap 500 is greater than or equal to 0.03: 3, and 0.1 or less: 3, the above effect is optimal.

Further, the present invention provides a stator structure 100 without a winding process during use. By the design, on the basis of ensuring the reduction of the torque pulsation of the motor, the assembly difficulty of the motor cannot be improved, particularly the difficulty of a winding process cannot be improved, and the cost of the motor applying the stator structure 100 cannot be increased.

Further, the present invention is an improvement to the stator structure 100 of an electric machine that does not require the windings 208 nor the permanent magnets 304. Therefore, compare in the related art and carry out the mode of improving to the rotor subassembly, the utility model discloses can not put forward more requirements to the structure of permanent magnet 304, can not lead to the assembly degree of difficulty promotion of permanent magnet 304 more, and then make the cost that should the motor of stator structure 100 can not increase.

The utility model discloses the tenth embodiment provides a motor, on the basis of the ninth embodiment, further:

as shown in fig. 4, the rotor assembly 300 includes a plurality of magnetically permeable blocks 302 and a plurality of permanent magnets 304. The plurality of magnetic conduction blocks 302 are distributed at the periphery of the stator assembly 200 at intervals, and two adjacent magnetic conduction blocks 302 are connected; the permanent magnets 304 are respectively arranged between two adjacent magnetic conduction blocks 302; and the polarities of two adjacent permanent magnets 304 are opposite to each other, so that a magnetic convergence effect is formed.

Further, as shown in fig. 4, two adjacent magnetic blocks 302 may be connected by a magnetic conductive member or a non-magnetic conductive member. Specifically, two adjacent magnetic blocks 302 are connected by a magnetic bridge.

Further, as shown in fig. 4, the permanent magnets 304 may be provided in a built-in spoke type magnet arrangement or a built-in V-shaped magnet arrangement. In particular, the permanent magnets 304 may be provided as a built-in spoke type magnet arrangement.

Specifically, the permanent magnet 304 may employ ferrite.

The utility model discloses eleventh embodiment provides a motor, on the basis of ninth embodiment and tenth embodiment, further:

as shown in fig. 4, the stator assembly 200 includes a stator core 202 and windings 208. The stator core 202 comprises a plurality of stator main teeth 204 arranged at intervals, and a stator slot 206 is formed between every two adjacent stator main teeth 204; windings 208 are wound around the stator main teeth 204 and are positioned within the stator slots 206.

Further, the number Zr of the magnetic conducting blocks 302, the number Ns of the stator slots 206, and the pole pair number Pa of the winding 208 satisfy: pa ═ Ns. + -. Zr/2 |. Therefore, new harmonic components in the air gap flux density can be used as the working harmonic of the motor to provide output torque for the motor, so that the torque density of the motor is effectively improved, and the efficiency of the motor is further improved.

In this embodiment, further, as shown in fig. 4, the winding 208 is wound on the tooth body of the stator main tooth 204, and may also be wound on the yoke portion of the stator main tooth 204. When the windings 208 are wound around the yoke portion of the stator main teeth 204, the ends of the windings 208 can be shortened, effectively balancing the conflict between the end overlength of the windings 208 and the high winding 208 factor of the motor. When the winding 208 is wound on the tooth body of the stator main tooth 204, the winding difficulty of the winding 208 can be reduced, and the improvement amplitude of the motor can be reduced.

In this embodiment, further, as shown in fig. 4, the winding 208 is a concentrated winding, so as to facilitate winding, and further improve the production efficiency of the motor.

Further in this embodiment, as shown in fig. 4, the windings 208 span only one stator main tooth 204. In this embodiment, further, the outer diameter of the stator structure 100 is larger than the outer diameter of the stator core 202. Specifically, the ratio of the outer diameters of the stator core 202 and the stator structure 100 is 0.66.

Further, in this embodiment, aluminum wire may be used for the electromagnet of the winding 208.

In this embodiment, further, the stator core 202, the stator structure 100 and the magnetic conductive blocks 302 are made of laminated silicon steel sheets.

The utility model discloses a twelfth embodiment provides a motor, on the basis of ninth embodiment, tenth embodiment and eleventh embodiment, further:

as shown in fig. 4, the stator assembly 200 also includes at least two stator secondary teeth 210. At least two stator secondary teeth 210 are arranged on the tooth shoe of the stator main tooth 204, and a groove 212 is formed between every two adjacent stator secondary teeth 210. In this way, the stator sub-teeth 210 function as a magnetic conductive member, and also function as a modulation member to modulate a magnetic field. At this time, unlike the conventional permanent magnet motor employed in the related art (slot opening is small, air gap permeance is close to constant).

In the present invention, the stator primary tooth 204 is split into at least two stator secondary teeth 210, so that more harmonic components are introduced into the air gap flux guide. Thus, the performance of the motor is obviously improved. Moreover, the motor is simple in structure and convenient to process and manufacture, the cost of the motor is not obviously increased, and the motor does not generate large vibration and noise.

In this embodiment, further, as shown in fig. 4, there are notches 214 between the tooth shoes of adjacent stator main teeth 204, the notches 214 communicating with the stator slots 206 to facilitate winding of the windings 208. Further, the size of the notch 214 is different from the size of the groove 212 in the circumferential direction of the stator core 202. By setting the sizes of the groove 212 and the notch 214 to be unequal, the uniformity of the stator secondary teeth 210 on all the stator primary teeth 204 in the circumferential distribution can be changed, the period number of the air gap permeance is reduced, and by reducing the period number of the air gap permeance, the flux density harmonic component generated by modulation is increased, so that more working harmonics can be generated, and the output torque of the motor is further improved.

The utility model discloses the fourteenth embodiment provides a motor, and this motor specifically is two air gap permanent-magnet machine. The motor can effectively reduce the torque pulsation of the motor under the condition of not increasing extra cost.

As shown in fig. 4, the motor includes a stator structure 100, a stator assembly 200, and a rotor assembly 300. Wherein, the radial dimensions of the stator core 202 of the stator structure 100 and the stator assembly 200 are different; moreover, the stator structure 100 and the stator core 202 are arranged in a center, the stator structure 100 is used as an outer stator, and the stator core 202 is used as an inner stator; as shown in fig. 5 and 6, the rotor assembly 300 is located between the stator structure 100 and the stator core 202, and a first air gap 400 (i.e., an inner air gap) is formed between the rotor assembly 300 and the stator assembly 200, and a second air gap 500 (i.e., an outer air gap) is formed between the stator structure 100 and the stator assembly 200.

Specifically, as shown in fig. 1, 2 and 3, the stator structure 100 includes a circular ring portion 102 and salient poles 104, the salient poles 104 are disposed to protrude from an inner peripheral wall of the circular ring portion 102, a concave portion 106 is provided between two adjacent salient poles 104 in a circumferential direction of the circular ring portion 102, and the stator structure 100 is not provided with a winding 208; the stator core 202 of the stator assembly 200 is provided with windings 208.

Further, a projected area of the salient pole 104 in the axial direction of the annular portion 102 is larger than a cross-sectional area of the salient pole 104. Specifically, as shown in fig. 1 and 2, the salient poles 104 may be disposed obliquely with respect to the axial direction of the annular ring portion 102; as shown in fig. 3, the salient poles 104 may be designed in a segmented manner in the axial direction of the annular portion 102. Further, in the case where the salient poles 104 are provided obliquely with respect to the axial direction of the annular portion 102, the salient poles 104 may extend continuously or may extend in stages in the axial direction of the annular portion 102. In the axial direction of the annular portion 102, the two adjacent salient poles 104 may be inclined in the same direction (in a straight line) or in opposite directions (in a V-line) with respect to the axial direction of the annular portion 102.

Further, as shown in fig. 4, the rotor assembly 300 includes a plurality of magnetically permeable blocks 302 and a plurality of permanent magnets 304. The permanent magnets 304 are respectively arranged between two adjacent magnetic conduction blocks 302, and the polarities of the two adjacent permanent magnets 304 are opposite to each other, so that a magnetic convergence effect is formed. Two adjacent magnetic conduction blocks 302 can be connected through a magnetic conduction part or a non-magnetic conduction part, and the magnets can be arranged in a built-in spoke type magnet arrangement or a built-in V-shaped magnet arrangement.

Further, as shown in fig. 4, the number Zr of the magnetic conductive blocks 302, the number Ns of the stator slots 206, and the pole pair number Pa of the winding 208 satisfy: pa ═ Ns. + -. Zr/2 |. Therefore, new harmonic components in the air gap flux density can be used as the working harmonic of the motor to provide output torque for the motor, so that the torque density of the motor is effectively improved, and the efficiency of the motor is further improved.

Specifically, as shown in fig. 7, in the case where the extending direction of the salient poles 104 is disposed obliquely to the axial direction of the circular ring part 102, when the extending direction of the salient poles 104 is inclined at an angle of 3 ° to the axial direction of the circular ring part 102, the torque ripple of the motor can be reduced from 10.3% to 3.4%, and the average torque of the motor is not affected.

Therefore, the present invention improves the stator structure 100 of the motor, and the salient poles 104 may be disposed in an inclined manner in the axial direction compared to the circular ring portion 102, or the salient poles 104 may be designed in a segmented manner in the axial direction of the circular ring portion 102, and the salient poles 104 in different segments are distributed in a staggered manner. Thus, the adjusting effect of the salient poles 104 on the magnetic field can be obviously improved, and further, the motor applying the stator structure 100 has lower torque ripple; and the torque of the motor applying the stator structure 100 can be ensured not to be influenced, thereby improving the stability of the motor in the operation process.

In addition, the stator structure 100 does not have a winding process during use. By the design, on the basis of ensuring the reduction of the torque pulsation of the motor, the assembly difficulty of the motor cannot be improved, particularly the difficulty of a winding process cannot be improved, and the cost of the motor applying the stator structure 100 cannot be increased.

Also, the stator structure 100 is neither provided with windings 208 nor does it require the installation of permanent magnets 304. Therefore, compare in the related art and carry out the mode of improving to the rotor subassembly, the utility model discloses can not put forward more requirements to the structure of permanent magnet 304, can not lead to the assembly degree of difficulty promotion of permanent magnet 304 more, and then make the cost that should the motor of stator structure 100 can not increase.

A thirteenth embodiment of the present invention provides an electrical device, including the motor according to any one of the above embodiments.

The utility model provides an electrical equipment, include the motor as above-mentioned any embodiment. Thus, the overall benefits of the motor described above are achieved and will not be discussed in detail here.

Specifically, the utility model provides an electrical equipment can be products such as refrigerator, washing machine, air conditioner.

In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific 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 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 (16)

1. A stator structure, comprising:

a circular ring part;

salient poles are arranged on the inner circumferential wall of the circular ring part and extend along the axial direction of the circular ring part;

wherein the projection area of the salient pole in the axial direction of the circular ring part is larger than the cross section area of the salient pole.

2. The stator structure according to claim 1,

the extending direction of the salient pole is inclined relative to the axial direction of the circular ring part.

3. The stator structure according to claim 2,

in the axial direction of the circular ring part, the inner peripheral wall of the circular ring part is provided with a section of the salient pole.

4. The stator structure according to claim 2,

in the axial direction of the circular ring part, at least two sections of salient poles are arranged on the inner peripheral wall of the circular ring part.

5. The stator structure according to claim 4,

in the axial direction of the circular ring part, the inclination directions of the salient poles of two adjacent sections are the same or opposite compared with the axial direction of the circular ring part.

6. The stator structure according to claim 1,

in the axial direction of the circular ring part, at least two sections of salient poles are arranged on the inner peripheral wall of the circular ring part, and the two adjacent sections of salient poles are distributed in a staggered mode.

7. The stator structure according to claim 6,

at least one segment of the salient pole extends in the axial direction of the circular ring part.

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

at least two salient poles are arranged on the inner circumferential wall of the circular ring part in the circumferential direction of the circular ring part, and a concave part is arranged between every two adjacent salient poles.

9. An electric machine, comprising:

the stator structure of any one of claims 1 to 8;

a rotor assembly disposed at an outer periphery or periphery of the stator structure.

10. The electric machine of claim 9 wherein the stator structure is disposed at an outer periphery of the rotor assembly, the electric machine further comprising:

a stator assembly disposed inside the rotor assembly;

wherein a first air gap is provided between the stator structure and the rotor assembly, and a second air gap is provided between the rotor assembly and the stator assembly.

11. The electric machine of claim 10, wherein the rotor assembly comprises:

the magnetic conduction blocks are distributed at the periphery of the stator assembly at intervals, and two adjacent magnetic conduction blocks are connected;

and the permanent magnets are respectively arranged between two adjacent magnetic conduction blocks, and the polarities of the two adjacent permanent magnets are opposite.

12. The electric machine of claim 11, wherein the stator assembly comprises:

the stator core comprises a plurality of stator main teeth, and a stator slot is formed between every two adjacent stator main teeth;

the winding is arranged on the stator main tooth and positioned in the stator slot;

the number Zr of the magnetic conduction blocks, the number Ns of the stator slots and the number Pa of the pole pairs of the windings meet the following requirements: pa ═ Ns. + -. Zr/2 |.

13. The electric machine of claim 12, wherein the stator assembly further comprises:

the stator main teeth are arranged on the stator main teeth, and grooves are formed between every two adjacent stator auxiliary teeth.

14. The electric machine of claim 13,

and notches are formed between the tooth shoes of the adjacent stator main teeth and communicated with the stator slots, and the size of each notch is different from that of each groove in the circumferential direction of the stator iron core.

15. The electrical machine according to any of the claims 12 to 14,

the winding is wound on the tooth body of the stator main tooth or wound on the yoke part of the stator main tooth; and/or

The winding is a centralized winding.

16. An electrical device, comprising:

an electric machine as claimed in any one of claims 9 to 15.

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