CN211981589U

CN211981589U - Electric machine

Info

Publication number: CN211981589U
Application number: CN202020538415.5U
Authority: CN
Inventors: 陈业震
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-11-20
Anticipated expiration: 2030-04-13

Abstract

The utility model discloses a motor, motor includes: the stator comprises a stator inner iron core, a stator outer iron core and a winding, wherein the winding is wound on the stator inner iron core, and the stator outer iron core is assembled on the outer side of the stator inner iron core; a rotor rotatably coupled to the stator. According to the utility model discloses the motor has advantages such as output height.

Description

Electric machine

Technical Field

The utility model belongs to the technical field of electrical equipment technique and specifically relates to a motor is related to.

Background

The motor in the related art mainly comprises a stator, a rotor and a rotating shaft, wherein a stator iron core of the motor has a narrow winding space due to the structural shape, so that the specification of a winding is limited, the output power of the motor is insufficient, and the motor is difficult to meet the requirement of high-power output in a water pump applied to a thermal management system.

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, an object of the present invention is to provide an electric machine, which has the advantages of high output power, etc.

To achieve the above object, according to the embodiment of the present invention, an electric machine is provided, including: the stator comprises a stator inner iron core, a stator outer iron core and a winding, wherein the winding is wound on the stator inner iron core, and the stator outer iron core is assembled on the outer side of the stator inner iron core; a rotor rotatably coupled to the stator.

According to the utility model discloses the motor has advantages such as output height.

According to some embodiments of the present invention, the stator outer core and the stator inner core are in interference fit.

According to some embodiments of the invention, the wire diameter of the winding is 1.5 mm-2.12 mm.

According to some embodiments of the present invention, the stator inner core comprises: a yoke having a ring-shaped cross-section; a plurality of teeth connected to an outer circumferential surface of the yoke and provided at intervals in a circumferential direction of the yoke; the tooth shoulders are connected to one ends, far away from the yoke, of the tooth parts in a one-to-one correspondence mode; wherein the winding is wound around the plurality of teeth portions.

Further, the cross section of the stator outer core is annular, the stator outer core surrounds the outer sides of the plurality of tooth shoulders, a plurality of assembling grooves which are arranged along the circumferential direction of the inner circumferential surface of the stator outer core at intervals are formed in the inner circumferential surface of the stator outer core, and the plurality of tooth shoulders are matched with the plurality of assembling grooves in a one-to-one correspondence mode.

According to some embodiments of the present invention, the outer circumferential surface of the yoke portion is provided with a plurality of notches, each of the notches extending in the axial direction of the yoke portion and being located between two adjacent tooth portions; wherein a plurality of through holes are formed in each notch at intervals in the axial direction of the yoke, and each through hole penetrates through the yoke in the thickness direction of the yoke.

Further, the width of the notch is less than 0.6 mm.

According to some embodiments of the utility model, stator inner core is moulded by a plurality of towards the piece superpositions and package and forms, partly towards the piece and be in stator inner core's upwards disconnection of circumference sets up in order to form the perforating hole.

According to some embodiments of the invention, the rotor comprises: a rotor core; the rotating shaft penetrates through the rotor iron core; the permanent magnets are arranged on the rotor core and are distributed along the circumferential direction of the rotor core; and the sealing sleeve coats the rotor core and the permanent magnet.

Furthermore, the outer peripheral surface of the rotor core is provided with a plurality of magnetic isolation bridges, each magnetic isolation bridge extends along the axial direction of the rotor core and corresponds to a part of the position between two adjacent permanent magnets, and the outer contour of the cross section of each magnetic isolation bridge is in a circular arc shape protruding towards the outer side of the rotor core.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a cross-sectional view of an electric machine according to an embodiment of the invention;

fig. 2 is a schematic structural diagram of a stator inner core and a stator outer core of a motor according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a rotor of an electric machine according to an embodiment of the present invention;

fig. 4 is a schematic view of an internal structure of a rotor of an electric machine according to an embodiment of the present invention.

Reference numerals:

a motor 1,

Stator 100, stator core 110, yoke 111, tooth 112, tooth shoulder 113, notch 114, through hole 115, and stator core,

A stator outer core 120, a winding 130, an assembly groove 121,

Rotor 200, rotor core 210, rotating shaft 220, permanent magnet 230, sealing sleeve 240, and magnetic isolation bridge 250.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.

In the description of the present invention, "a plurality" means two or more, and "a plurality" means one or more.

The following describes a motor 1 according to an embodiment of the present invention with reference to the drawings.

As shown in fig. 1 to 4, a motor 1 according to an embodiment of the present invention includes a stator 100 and a rotor 200.

The stator 100 includes a stator inner core 110, a stator outer core 120, and a winding 130, the winding 130 is wound around the stator inner core 110, and the stator outer core 120 is assembled outside the stator inner core 110. The rotor 200 is rotatably coupled to the stator 100.

According to the utility model discloses motor 1, through setting up stator core into stator inner core 110 and stator outer core 120, both adopt the components of a whole that can function independently to set up, can wind winding 130 on stator inner core 110 earlier like this, because this moment stator outer core 120 installs outward, winding 130 winding space is great, can satisfy the winding of the winding 130 of major diameter, winding 130 twines the completion back, stator outer core 120 is reassembled again, form complete stator core, so, motor 1 who adopts this stator core has bigger output.

Therefore, the motor 1 according to the embodiment of the present invention has the advantages of high output power, etc.

According to some embodiments of the present invention, as shown in fig. 1, the stator outer core 120 is interference fit with the stator inner core 110.

The stator outer core 120 and the stator inner core 110 are more stably connected, and cannot move mutually, so that stable operation of the stator 100 is facilitated, the size of the stator 100 is reduced, and the motor 1 can output larger power while being miniaturized.

According to some embodiments of the present invention, the wire diameter of the winding 130 is 1.5mm to 2.12 mm. Choose the winding 130 of great diameter, satisfy the great electric current of winding 130 accessible under the high-power output, and then export bigger power, for example, in the embodiment of the utility model provides a winding 130 can be applied to 12V system, and the power of the biggest exportable 300W ~ 400W has improved motor 1's output through adopting winding 130 that the diameter is 1.5mm ~ 2.12 mm.

According to some embodiments of the present invention, as shown in fig. 2, the stator inner core 110 includes a yoke portion 111, a plurality of tooth portions 112, and a plurality of tooth shoulders 113. The yoke 111 has a ring-shaped cross section. The plurality of teeth 112 are connected to the outer circumferential surface of the yoke 111 and are provided at intervals in the circumferential direction of the yoke 111. The plurality of tooth shoulders 113 are connected to one ends of the plurality of tooth portions 112, which are far from the yoke portion 111, in a one-to-one correspondence. Wherein the winding 130 is wound around the plurality of teeth 112.

Accordingly, the stator core 110 can be wound with more windings 130, and thus can output higher power. The winding 130 can be formed by winding the winding 130 around the tooth portions 112, and the plurality of tooth portions 112 are provided corresponding to the plurality of tooth shoulders 113. The stop provided by the yoke portion 111 and the shoulder 113 provides a location for the windings 130 so that the windings 130 do not disengage from the stator core 110.

Further, the stator outer core 120 has a ring-shaped cross section, as shown in fig. 2, the stator outer core 120 surrounds the outer sides of the plurality of tooth shoulders 113, the inner circumferential surface of the stator outer core 120 is provided with a plurality of fitting grooves 121 disposed at intervals along the circumferential direction thereof, and the plurality of tooth shoulders 113 are fitted to the plurality of fitting grooves 121 in one-to-one correspondence.

The stator inner core 110 can be assembled inside the stator outer core 120, and the corresponding arrangement of the tooth shoulders 113 and the assembly grooves 121 prevents the stator inner core 110 and the stator outer core 120 from rotating with each other, thereby improving the assembly stability of the stator 100. And the stator inner core 110 and the stator outer core 120 are detachable to facilitate winding the winding 130.

In addition, when the stator outer core 120 is assembled, the adjacent teeth portions 112 of the stator inner core 110 pass through gaps between the tooth shoulders 113 to form a relatively open structure so as to wind the winding 130 having a large diameter. After the winding of the winding 130 is completed, the relatively open structure is closed by the stator outer core 120 to ensure the stability of the winding 130.

In some embodiments of the present invention, as shown in fig. 2, the outer circumferential surface of the yoke portion 111 is provided with a plurality of notches 114, and each notch 114 extends along the axial direction of the yoke portion 111 and is located between two adjacent tooth portions 112. A plurality of through holes 115 are formed in each notch 114 at intervals in the axial direction of the yoke portion 111, and each through hole 115 penetrates through the yoke portion 111 in the thickness direction of the yoke portion 111. This ensures both the performance and the efficiency of the electric machine 1 and its structural strength with the achievable production process. Wherein the width of the slot 114 is less than 0.6 mm.

In some embodiments of the present invention, as shown in fig. 2, the stator inner core 110 is formed by stacking and coating a plurality of punching sheets, and a part of the punching sheets are disposed in a broken manner in the circumferential direction of the stator inner core 110 to form the through hole 115.

Specifically, the punching sheets of the stator inner core 110 include two types, one type is an integral ring shape, the other type is circumferentially disconnected, the two types of punching sheets are alternately arranged, the disconnected punching sheets form a through hole 115, then the punching sheets are riveted together, and finally plastic is coated through an injection mold, so that the punching sheets can be used as an insulating coating layer of the winding 130, the mechanical strength is increased, and no deformation is guaranteed.

For example, the stator inner core 110 may include a punched piece, and each of the through holes 115 is formed of 5 cut punched pieces. The stator 100 may have an outer diameter of 78mm, an inner diameter of 39mm, and an axial height of 30.5mm, and the motor 1 has an output of 400W.

In some embodiments of the present invention, as shown in fig. 3 and 4, the rotor 200 includes a rotor core 210, a rotating shaft 220, a plurality of permanent magnets 230, and a sealing sleeve 240. The rotating shaft 220 is inserted through the rotor core 210. The plurality of permanent magnets 230 are provided in the rotor core 210 and arranged along the circumferential direction of the rotor core 210. The gland 240 wraps the rotor core 210 and the permanent magnet 230.

Specifically, the outer diameter of rotor core 210 may be 35.4mm, the axial height may be 30.5mm, and rotor core 210 and permanent magnet 230 may be assembled by interference fit, so as to ensure that permanent magnet 230 does not separate from rotor core 210 due to rotation of rotor 200. The permanent magnets 230 may be four and uniformly arranged in the circumferential direction of the rotor core 210. The gland 240 wraps the rotor core 210 and the permanent magnet 230. The material of the sealing sleeve 240 can be stainless steel, and the sealing sleeve is welded on the periphery of the rotor core 210 in a laser welding mode, so that the rotor core 210 and the permanent magnet 230 are sealed, a medium is prevented from entering the rotor core 210 and the permanent magnet 230, the rotor core 210 and the permanent magnet 230 are protected from being rusted, and the magnetic performance of the rotor 200 is guaranteed to meet requirements. For convenience of assembly, the sealing sleeve 240 has a separate structure, and includes a portion that is wrapped around the rotor core 210 and portions that are wrapped around the two end surfaces of the rotor core 210, respectively.

Further, as shown in fig. 3, the outer circumferential surface of the rotor core 210 is configured with a plurality of magnetic isolation bridges 250, each magnetic isolation bridge 250 extends in the axial direction of the rotor core 210 and corresponds to a portion between two adjacent permanent magnets 230, and the outer contour of the cross section of the magnetic isolation bridge 250 is a circular arc shape protruding to the outside of the rotor core 210.

For example, the outer profile of the cross section of the magnetic isolation bridge 250 is an 1/4 semicircular structure, so that the width of the magnetic isolation bridge 250 has a smaller size under the condition of meeting the process production conditions, and the magnetic isolation bridge can play a role in reducing the magnetic leakage of the rotor 200 and improving the utilization rate of the permanent magnet 230, thereby improving the magnetic performance of the rotor 200.

Other constructions and operations of the electric machine 1 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.

In the description herein, references to the description of the terms "particular embodiment," "particular example," etc., mean 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.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric machine, comprising:

the stator comprises a stator inner iron core, a stator outer iron core and a winding, wherein the winding is wound on the stator inner iron core, and the stator outer iron core is assembled on the outer side of the stator inner iron core;

a rotor rotatably coupled to the stator.

2. The electric machine of claim 1, wherein the stator outer core is an interference fit with the stator inner core.

3. The electric machine of claim 1, wherein the wire diameter of the winding is 1.5mm to 2.12 mm.

4. The electric machine of claim 1, wherein the stator inner core comprises:

a yoke having a ring-shaped cross-section;

a plurality of teeth connected to an outer circumferential surface of the yoke and provided at intervals in a circumferential direction of the yoke;

the tooth shoulders are connected to one ends, far away from the yoke, of the tooth parts in a one-to-one correspondence mode;

wherein the winding is wound around the plurality of teeth portions.

5. The electric machine according to claim 4, wherein the stator outer core has a ring-shaped cross section, the stator outer core surrounds the outside of the plurality of tooth shoulders, the inner circumferential surface of the stator outer core is provided with a plurality of fitting grooves arranged at intervals along the circumferential direction thereof, and the plurality of tooth shoulders are fitted to the plurality of fitting grooves in a one-to-one correspondence.

6. The electric machine according to claim 4, wherein the outer circumferential surface of the yoke is provided with a plurality of slots each extending in the axial direction of the yoke and located between adjacent two of the teeth;

wherein a plurality of through holes are formed in each notch at intervals in the axial direction of the yoke, and each through hole penetrates through the yoke in the thickness direction of the yoke.

7. The electric machine of claim 6 wherein the width of the slot is less than 0.6 mm.

8. The motor of claim 6, wherein the stator inner core is formed by overlapping and plastic-coating a plurality of punching sheets, and part of the punching sheets are arranged in a breaking manner in the circumferential direction of the stator inner core to form the through holes.

9. The electric machine of claim 1, wherein the rotor comprises:

a rotor core;

the rotating shaft penetrates through the rotor iron core;

the permanent magnets are arranged on the rotor core and are distributed along the circumferential direction of the rotor core;

and the sealing sleeve coats the rotor core and the permanent magnet.

10. The motor according to claim 9, wherein the outer circumferential surface of the rotor core is configured with a plurality of magnetic isolation bridges, each magnetic isolation bridge extends along the axial direction of the rotor core and corresponds to a part between two adjacent permanent magnets, and the outer contour of the cross section of each magnetic isolation bridge is in a circular arc shape protruding towards the outer side of the rotor core.