CN112564360A

CN112564360A - Stator and motor

Info

Publication number: CN112564360A
Application number: CN201910919388.8A
Authority: CN
Inventors: 甘峰; 于明湖; 吕强
Original assignee: Guangdong Welling Motor Manufacturing Co Ltd
Current assignee: Guangdong Welling Motor Manufacturing Co Ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2021-03-26

Abstract

The application discloses a stator and a motor. The stator includes: the stator core is enclosed into a ring shape and comprises 12 stator slots; the grooves 1, 2 and 3 are respectively provided with a lead pin, and the other grooves are provided with a central pin; a starting winding head of the U-phase winding is connected with a lead pin of the 1 slot, and the tail end of the winding is connected with a central pin; a winding start head of the V-phase winding is connected with a lead pin of the 2-slot winding, and a winding tail end is connected with a central pin; and in the W-phase winding, the starting winding head is connected with the lead pin of the 3 slots, and the tail end of the winding is connected with the central pin. Through all being provided with a lead wire contact pin in 1 groove, 2 grooves and 3 grooves, be provided with a central contact pin in other grooves, the cost and the production degree of difficulty of stator can have been reduced in this application.

Description

Stator and motor

Technical Field

The application relates to the technical field of motors, in particular to a stator and a motor.

Background

In the household appliance industry, current motors employ an electromagnetic topology that includes a stator and a rotor. The conventional stator is complex in winding and long in span, the span between the inlet wires of each phase of winding is long, the span of the tail wire is also long, the cost for subsequently installing each part is higher, the process of each winding is complex, and the production difficulty of the stator is high.

Disclosure of Invention

The application mainly provides a stator and a motor to solve the problems that the stator is high in cost and large in production difficulty.

In order to solve the technical problem, the application adopts a technical scheme that: a stator is provided. The stator includes: the stator core is enclosed into a ring shape and comprises 12 stator slots; the

grooves

1, 2 and 3 are respectively provided with a lead pin, and the other grooves are provided with a central pin; a starting winding head of the U-phase winding is connected with a lead pin of the 1 slot, and the tail end of the winding is connected with a central pin; a winding start head of the V-phase winding is connected with a lead pin of the 2-slot winding, and a winding tail end is connected with a central pin; and in the W-phase winding, the starting winding head is connected with the lead pin of the 3 slots, and the tail end of the winding is connected with the central pin.

In a specific embodiment, the U-phase winding is disposed in 1 slot, 2 slots, 7 slots, and 8 slots, the V-phase winding is disposed in 3 slots, 4 slots, 9 slots, and 10 slots, and the W-phase winding is disposed in 5 slots, 6 slots, 11 slots, and 12 slots.

In a specific embodiment, the winding from the 1 slot to the 12 slots is arranged in a positive, negative and reverse periodic mode.

In a specific embodiment, the stator core comprises a plurality of T-shaped stator units, and the plurality of stator units are sequentially connected and enclosed to form a ring shape; the stator unit comprises a yoke part, a tooth part and a tooth shoulder, the tooth part is connected between the yoke part and the tooth shoulder, and a plurality of yoke parts of the plurality of stator units are sequentially connected; a gap is arranged between two adjacent tooth shoulders, and the size of the gap is 0.5 mm-1.8 mm.

In a specific embodiment, one connecting end of the yoke part is a protrusion, and the other connecting end of the yoke part is a groove; the plurality of yokes are sequentially meshed and connected through the protrusions and the grooves.

In a specific embodiment, bellied root is equipped with the joint groove, the one end correspondence that recess place was equipped with the card post on yoke portion, the card post with the cooperation of joint groove joint.

In a specific embodiment, the inner surface of the yoke is planar and parallel to the outer surface of the yoke.

In a specific embodiment, the stator further includes a plastic-coated member, the plastic-coated member is coated on the stator core, and the lead pins and the central pin are exposed out of the plastic-coated member.

In one embodiment, the central pin is disposed on any one of the 8 slots to the 12 slots.

In order to solve the above technical problem, another technical solution adopted by the present application is: an electric machine is provided. The motor comprises a stator as described above.

The beneficial effect of this application is: in contrast to the state of the art, the present application discloses a stator and an electric machine. The lead pins are arranged in the groove 1, the groove 2 and the groove 3, and the central pins are arranged in other grooves, so that the wire inlet starting heads of the U-phase winding, the V-phase winding and the W-phase winding are close to each other, and the circuit board connected with the lead pins can be miniaturized relatively, the area of the circuit board is reduced relatively, the material cost of the circuit board is reduced, and the cost of the stator is reduced relatively; and the tail ends of the U-phase winding, the V-phase winding and the W-phase winding are pulled to the central contact pin on the same stator slot to be connected, so that the tail ends of the windings are conducted, the processing difficulty of the tail ends of the windings is reduced, and the stator is convenient to produce.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a schematic structural diagram of an embodiment of a stator provided herein;

FIG. 2 is a schematic cross-sectional view of the stator of FIG. 1;

FIG. 3 is a schematic diagram of a winding configuration for each winding in the stator of FIG. 1;

fig. 4 is a schematic view of a stator core structure in the stator of fig. 1;

FIG. 5 is a schematic view of a first construction of a stator unit in the stator core of FIG. 4;

FIG. 6 is a second structural schematic view of a stator unit in the stator core of FIG. 4;

FIG. 7 is a dimensional reference schematic of the stator core of FIG. 4;

fig. 8 is a schematic structural diagram of another embodiment of a stator provided in the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any inventive step based on the embodiments in the present application, are within the scope of protection of the present application.

If in the embodiments of the present application there is a description referring to "first", "second", etc., the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a stator provided in the present application.

As shown in fig. 1 to 4, the stator 100 includes a stator core 10, a U-phase winding 20, a V-phase winding 22, and a W-phase winding 24, and the U-phase winding 20, the V-phase winding 22, and the W-phase winding 24 are repeatedly wound in a stator slot on the stator core 10 in this order.

Specifically, the stator core 10 is enclosed in a ring shape and comprises 12 stator slots 11; one lead pin 13 is provided in each of the 1, 2 and 3 slots, and one center pin 15 is provided in the other slots.

Namely, 12 stator slots 11 are numbered from 1 to 12 in sequence, the 1 slot is the stator slot 11 numbered 1, the 2 slot is the stator slot 11 numbered 2 in sequence, and a lead pin 13 is provided in each of the 1 slot, the 2 slot and the 3 slot correspondingly.

A U-phase winding 20, the starting winding head of which is connected with the lead pin 13 of the 1 slot, and the tail end of the winding is connected with the central pin 15; a V-phase winding 22, wherein the starting winding head of the V-phase winding is connected with the lead pin 13 of the 2-slot winding, and the tail end of the winding is connected with the central pin 15; and the starting winding head of the W-phase winding 24 is connected with the lead pin 13 of the 3 slots, and the tail end of the winding is connected with the central pin 15.

The U-phase winding 20 is fed with wire from the 1 slot, and the 1 slot is used as an initial slot of the U-phase winding 20 for starting winding; the V-phase winding 22 is fed with wire from 2 slots and is stretched to 3 slots, and winding is started by taking the 3 slots as initial slots of the V-phase winding 22; the W-phase winding 24 is fed from 3 slots and drawn to 5 slots, and winding is started with 5 slots as the starting slot of the V-phase winding 22.

Specifically, the U-phase winding 20 is disposed in 1 slot, 2 slots, 7 slots, and 8 slots, the V-phase winding 22 is disposed in 3 slots, 4 slots, 9 slots, and 10 slots, and the W-phase winding 24 is disposed in 5 slots, 6 slots, 11 slots, and 12 slots.

That is, the U-phase winding 20 is wound for 1 slot, 2 slots, 7 slots, and 8 slots in this order, the V-phase winding 22 is wound for 3 slots, 4 slots, 9 slots, and 10 slots in this order, and the W-phase winding 24 is wound for 5 slots, 6 slots, 11 slots, and 12 slots in this order.

Specifically, the center pin 15 may be provided on any one of 8 slots to 12 slots, and the U-phase winding 20, the V-phase winding 22, and the W-phase winding 24 are all connected to the center pin 15, so that the center pin 15 serves as a common terminal of the three-phase windings.

Further, referring to fig. 3, the winding direction from 1 slot to 12 slots is arranged in a positive, negative and reverse periodic manner, and the winding direction on two adjacent stator slots 11 wound by the same winding is opposite, so as to facilitate increasing the power density of the stator 100.

For example, it is assumed that the winding direction of 1 slot is a forward direction (e.g., counterclockwise direction), the winding direction of 2 slots is a reverse direction (clockwise direction), and the winding directions from 3 slots to 12 slots are respectively reverse, forward, reverse, and forward, which conforms to the periodic rule of forward and reverse winding directions.

Referring to fig. 4 to 7, the stator core 10 includes a plurality of T-shaped stator units 12, and the plurality of stator units 12 are sequentially engaged, connected and enclosed to form a ring shape; the stator unit 12 includes a yoke portion 120, a tooth portion 122 and a tooth shoulder 124, the tooth portion 122 is connected between the yoke portion 120 and the tooth shoulder 124, the plurality of yoke portions 120 of the plurality of stator units 12 are sequentially engaged and connected, and further, the stator slots 11 are formed between the adjacent tooth portions 122 to form the plurality of stator slots 11.

Wherein, the outer surface 121 of the yoke portion 120 is a plane, and forms a polygonal outer surface of the stator core 10; the inner surface of the shoulder 124 is arc-shaped and forms a circular inner surface of the stator core 10 to facilitate the rotation of the rotor with respect to the stator core 10.

For example, the stator core 10 includes 12T-shaped stator units 12, which can be fitted to a rotor having 8 or 10 poles.

Through setting up a plurality of stator units 12 and meshing the connection in proper order and enclose and synthesize cyclic annularly, in order to constitute stator core 10, and then when a plurality of stator units 12 do not make up into stator core 10, each stator unit 12 is independent each other, therefore can improve the utilization ratio of the material of preparation stator unit 12, make the material of smaller size also utilize and make into stator unit 12, be the plane with the surface 121 setting of yoke portion 120 simultaneously, make the surface of this stator unit 12 relative yoke portion personally submit the shared area of curved stator unit littleer, the utilization ratio of the material has further been improved, and then make the cost of manufacture of stator core 10 reduce.

Specifically, as shown in fig. 5, one end of the yoke 120 is provided with a protrusion 127, and the other end is provided with a groove 128; the plurality of yokes 120 are sequentially engaged and connected by the protrusions 127 and the grooves 128. The protrusion 127 has a semi-cylindrical shape and the recess 128 has a semi-circular groove, and the semi-cylindrical shape is engaged with the semi-circular groove to connect two adjacent yokes 120.

Further, as shown in fig. 6, the root of the protrusion 127 is provided with a clamping groove 1271, one end of the yoke 120 where the groove 128 is located is correspondingly provided with a clamping column 1281, and the clamping column 1281 is in clamping fit with the clamping groove 1271, so that the meshing connection strength between the stator units 12 can be further enhanced.

Referring to fig. 4 and 5, the inner surface 123 of the yoke 120 is a plane and is parallel to the outer surface 121 of the yoke 120, and the teeth 122 are vertically disposed on the inner surface 123, so that the conductive wire can be attached to the inner surface 123 and the winding is started from the inner surface 123, and the winding on the teeth 122 is neat and has a high winding slot filling rate.

Compared with the stator core with the cambered surface on the inner surface of the yoke part, the maximum slot full rate of the winding is 65%, and the maximum slot full rate of the winding of the stator core 10 provided by the application can reach 70%, so that the slot full rate of the winding of the stator core 10 is relatively improved. And the inner surface 123 is a plane, the utilization rate of the material for manufacturing the stator unit 12 can be further improved, and the outer surface 121 and the inner surface 123 are both planes, the structure of the mold for manufacturing the stator core 10 becomes simpler, so that the cost of the mold can be reduced, and the manufacturing cost of the stator core 10 can be further reduced.

Further, as shown in fig. 7, the diameter B of the circular inner surface is defined to be 48mm to 52mm, and the outer diameter of the rotor matched with the circular inner surface is further defined, and in the size range, the efficiency of the motor can be relatively high.

The ratio of the distance a between two opposite sides in the polygonal outer surface of the stator core 10 to the diameter B of the circular inner surface is 1.4 or more and 1.6 or less. The design can ensure high material utilization rate, low iron loss, high power density and good performance of the stator core 10.

Further, as shown in fig. 5, the thickness E of the yoke portion 120 is 3.5mm to 4.0mm, and the width D of the tooth portion 122 is 4.5mm to 5.5mm, which can ensure high material utilization rate, high winding slot filling rate and high power density of the stator core 10, and make the magnetic saturation conditions of the yoke portion 120 and the tooth portion 122 more balanced, thereby improving the performance of the rotor core 10.

The shoulder 124 is a tapered shoulder, which is effective to improve the magnetic saturation at the connection with the tooth 122, relative to a straight shoulder.

Further, the spacing distance C between the tooth shoulders 124 in two adjacent stator units 12 is 0.3mm to 1.8mm, and the magnetic leakage and the harmonic content of the stator core 10 are low (i.e., the vibration is small) in this range.

The yoke portion 120 is provided with a first riveting point 125, the tooth shoulder 124 is provided with a second riveting point 126, and the area of the second riveting point 126 is smaller than that of the first riveting point 125. Compared with the scheme that the second riveting point 126 is arranged on the tooth portion 122, the second riveting point 126 is moved downwards to the tooth shoulder 124, and the size area of the second riveting point 126 is further reduced relative to the first riveting point 125, so that the magnetic saturation conditions on the tooth portion 122 and the tooth shoulder 124 can be effectively improved, and the power density of the stator core 10 is improved.

The stator core 10 includes a plurality of stacked stator laminations, the stator laminations are provided with the first riveting point 125 and the second riveting point 126, and the plurality of stator laminations form the stator core 10 by stacking and riveting the first riveting point 125 and the second riveting point 126.

Further, as shown in fig. 2, the stator 100 further includes a bobbin 30, and the bobbin 30 is an insulating bobbin made of, for example, a resin insulating material. The bobbin 30 covers the inner surface 123 of the yoke portion 122, the inner surfaces of the tooth portion 122 and the tooth shoulder 124 to isolate the insulating U-phase winding 20, the V-phase winding 22, the W-phase winding 24 from the corresponding stator unit 12, thereby protecting the stator 100 and alleviating the influence of the winding leakage on the stator.

The bobbin 30 may be a combined structure including an upper bobbin and a lower bobbin, which are fastened and attached to the stator unit 12. Alternatively, the bobbin 30 is formed on the stator unit 12 by injection molding.

Further, as shown in fig. 1, the stator 100 further includes a plastic-coated member 40, and the plastic-coated member 40 is coated on the outer surfaces of the stator core 10, the U-phase winding 20, the V-phase winding 22, the W-phase winding 24, and the bobbin 30, and exposes the three lead pins 13 and the center pin 15. The plastic-coated piece 40 is plastic-coated on the outer surfaces of the stator core 10, the phase windings and the bobbin 30 in an internal injection molding mode. The condition that the stator core 10 leaks outside does not exist after the plastic package, and the sealing performance and the rust prevention capability of the stator 100 can be further ensured.

Further, the stator 100 further comprises a pin fixing plate 17, the pin fixing plate 17 is connected with the three lead pins 13 and used for fixing the lead pins 13 and assisting in sealing when the stator core 10 is subjected to plastic sealing, so that the injection molding material is prevented from flowing to the parts of the lead pins 13 which need to leak.

Further, as shown in fig. 1, the stator 100 may further include a circuit board 50, the circuit board 50 is electrically connected to the three lead pins 13, and the circuit board 50 is disposed on the pin fixing plate 17 to control windings on the stator 100.

Compared with the scheme that the U-phase winding 20 is fed in from 1 slot, the V-phase winding 22 is fed in from 3 slots, and the W-phase winding 24 is fed in from 5 slots, in the scheme, the U-phase winding 20 is fed in from 1 slot, the V-phase winding 22 is fed in from 2 slots, and the W-phase winding 24 is fed in from 3 slots, namely, the lead pins 13 are adjacently arranged, so that the fed wires of the phase windings are close, the miniaturization of a circuit board connected with the lead pins 13 can be relatively realized, the area of the circuit board can be relatively reduced, and the material cost of the circuit board is further reduced; and the tail ends of the U-phase winding, the V-phase winding 22 and the W-phase winding 24 are pulled down to the central contact pin 15 on the same stator slot to be connected, so that the tail ends of the windings are conducted, the processing difficulty of the tail ends of the windings is reduced, and the production of the stator 100 is facilitated.

Further, the present application also provides a motor including the stator 100 as described above, so that the overall cost of the motor can be reduced and the performance of the motor can be improved.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.

Claims

1. A stator, characterized in that the stator comprises:

the stator core is enclosed into a ring shape and comprises 12 stator slots; the grooves 1, 2 and 3 are respectively provided with a lead pin, and the other grooves are provided with a central pin;

a starting winding head of the U-phase winding is connected with the lead pin of the 1 slot, and the tail end of the winding is connected with the central pin;

a winding start head of the V-phase winding is connected with the lead pin of the 2-slot winding, and the tail end of the winding is connected with the central pin;

and a winding start head of the W-phase winding is connected with the lead pin of the 3 slots, and the tail end of the winding is connected with the central pin.

2. The stator according to claim 1, wherein the U-phase winding is provided in 1 slot, 2 slot, 7 slot and 8 slot, the V-phase winding is provided in 3 slot, 4 slot, 9 slot and 10 slot, and the W-phase winding is provided in 5 slot, 6 slot, 11 slot and 12 slot.

3. The stator as claimed in claim 2, wherein the winding pattern from 1 slot to 12 slots is arranged in a positive, negative and reverse periodic manner.

4. The stator according to claim 1, wherein the stator core comprises a plurality of T-shaped stator units, and the plurality of stator units are sequentially connected and enclosed to form a ring shape; the stator unit comprises a yoke part, a tooth part and a tooth shoulder, the tooth part is connected between the yoke part and the tooth shoulder, and a plurality of yoke parts of the plurality of stator units are sequentially connected; a gap is arranged between two adjacent tooth shoulders, and the size of the gap is 0.5 mm-1.8 mm.

5. The stator according to claim 4, wherein one end of the yoke portion is provided with a protrusion and the other end is provided with a groove; the plurality of yokes are sequentially meshed and connected through the protrusions and the grooves.

6. The stator according to claim 5, wherein the root of the protrusion is provided with a clamping groove, one end of the yoke part where the groove is located is correspondingly provided with a clamping column, and the clamping column is in clamping fit with the clamping groove.

7. The stator of claim 4, wherein the inner surface of the yoke is planar and parallel to the outer surface of the yoke.

8. The stator of claim 1, further comprising a plastic-coated member, wherein the plastic-coated member is coated on the stator core, and the lead pins and the center pin are exposed from the plastic-coated member.

9. The stator of claim 1, wherein the central pin is disposed on any one of 8 slots to 12 slots.

10. An electrical machine, characterized in that the electrical machine comprises a stator according to any of claims 1-9.