CN213213194U

CN213213194U - Stator core, outer rotor motor and air interchanger

Info

Publication number: CN213213194U
Application number: CN202022524765.9U
Authority: CN
Inventors: 范文; 吴欣荣
Original assignee: Guangdong Shunde Yian Motor Co ltd
Current assignee: Guangdong Shunde Yian Motor Co ltd
Priority date: 2020-11-05
Filing date: 2020-11-05
Publication date: 2021-05-14
Anticipated expiration: 2030-11-05

Abstract

The utility model relates to the technical field of electric machine, specifically disclose a stator core, external rotor electric machine and breather. The stator punching sheet on the stator core is provided with stator teeth, tooth boots are arranged on the stator teeth, the outer side walls of the tooth boots are composed of first arc side walls, central arc side walls and second arc side walls, arcs corresponding to the three sections of side walls are respectively a first arc, a central arc and a second arc, the arc lengths are respectively S1, S2 and S3, and the requirement that S2/(S1 + S2+ S3) is more than or equal to 0.65 is met; the centers of the first arc and the second arc are coincident with the point A, the central symmetric line of the first arc and the second arc is intersected with the central arc at the intersection point B, the lengths of the straight lines OA and OB are L1 and L2 respectively, and the requirement that the L1/L2 is more than or equal to 0.6 and less than or equal to 0.8 is met. Through the design of the stator core of the motor, the average air gap is reduced, the performance of the motor is effectively improved, and the vibration amplitude and the noise of the motor are further reduced.

Description

Stator core, outer rotor motor and air interchanger

Technical Field

The utility model relates to a motor electromagnetism technical field, concretely relates to stator core, external rotor electric machine and breather.

Background

At present, as a widely used driving device, an air gap exists between a stator and a rotor of a motor, whether the motor is a rotating motor or a linear motor. The oversize or undersize of the air gap influences the sine of the air gap flux density and the height of the dominant odd harmonic, and further influences the performance of the motor. In the prior art, the size of the air gap cannot be well controlled, so that the performance of the motor is greatly reduced, and the vibration amplitude and the noise of the motor are large.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a stator core, external rotor electric machine and breather solve effectively and then lead to the problem that the motor performance discounted greatly owing to electron air gap size among the fine control motor.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a stator core, piles up by a plurality of stator punching and forms, the stator punching includes towards piece ring sum a plurality of stator tooth, it is located stator punching middle part and towards the centre of a circle and the stator punching coincidence of piece ring to towards the piece ring, stator tooth distributes in towards the outer lane of piece ring along circumference.

The stator tooth includes tooth portion and tooth boots portion radially from inside to outside in proper order, and is a plurality of the outer lane that forms the stator towards the piece is encircleed along circumference to the tooth boots portion, the lateral wall of tooth boots portion comprises multistage pitch arc lateral wall.

Preferably, last multistage pitch arc lateral wall of tooth boots portion includes central arc lateral wall and is located respectively the first pitch arc lateral wall and the second pitch arc lateral wall of central arc lateral wall both sides, first pitch arc lateral wall and second pitch arc lateral wall are bilateral symmetry and set up, tooth boots portion corresponds to the thickness of first pitch arc lateral wall, second pitch arc lateral wall towards the direction of tooth boots portion both sides reduces gradually.

The arcs corresponding to the outer edges of the side wall of the first arc line, the side wall of the central arc line and the side wall of the second arc line are respectively a first arc, a central arc and a second arc; the center O corresponding to the central arc coincides with the center of the stator punching sheet, the lengths and the radiuses of the first arc and the second arc are equal, the centers of the first arc and the second arc coincide with the point A and deviate from the center O, the central symmetry line of the first arc and the second arc intersects with the central arc at the intersection point B, and the center O, the center A and the intersection point B are located on the central symmetry line of the first arc and the second arc.

Preferably, the arc lengths of the first arc, the central arc and the second arc are S1, S2 and S3 respectively, and S1, S2 and S3 meet 0.65 ≦ S2/(S1 + S2+ S3) ≦ 0.75; the lengths of straight lines OA and OB formed by connecting the circle center O with the circle center A and the intersection point B are respectively L1 and L2, and L1 and L2 meet the condition that L1/L2 is more than or equal to 0.6 and less than or equal to 0.8.

An outer rotor motor comprises the stator core, a motor rotor, a rotating shaft, a bearing support seat and a winding wound on the stator core; the stator core is nested on the bearing support seat, one end of the rotating shaft is rotatably arranged on the bearing support seat, and the other end of the rotating shaft is fixedly connected with the motor rotor.

The air interchanger comprises the outer rotor motor and the fan blade, wherein the fan blade is provided with a central hole and is sleeved on a rotating shaft of the outer rotor motor through the central hole.

Preferably, the fan blade is an axial flow fan blade or a cross-flow fan blade or a centrifugal fan blade.

The beneficial effects of the utility model are that, the design of the three-section pitch arc lateral wall of tooth boots portion realizes the sinusoidal of air gap magnetic density on this motor stator core, reduces leading odd harmonic to obtain the lower back emf wave form of harmonic volume, under the prerequisite of guaranteeing ideal harmonic content, reduced average air gap, improved the performance of motor effectively, further reduced the vibration amplitude and the noise of motor. Furthermore, the motor and different fan blades are combined into the air interchanger suitable for different scenes.

Drawings

Fig. 1 is a plan view of a stator punching sheet in an embodiment of the present invention;

fig. 2 is a longitudinal sectional view of the outer rotor motor according to the embodiment of the present invention.

In the figure, 1, a stator punching sheet, 11, a punching sheet circular ring, 12, stator teeth, 121, teeth, 122, a tooth shoe portion, 1221, a first arc side wall, 1222, a central arc side wall, 1223, a second arc side wall, 2, a first arc, 21, a central arc, 22, a second arc, 3, an outer rotor motor, 31, a motor rotor, 32, a rotating shaft, 33, a bearing support seat, 34, a winding and 35 are stator iron cores.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description of the present invention with reference to the accompanying drawings and embodiments is made.

In fig. 1, a stator core according to this embodiment is formed by stacking a plurality of stator laminations 1, where each stator lamination 1 includes a lamination ring 11 and a plurality of stator teeth 12, the lamination ring 11 is located in the middle of the stator lamination 1, the circle center of the lamination ring 11 coincides with the stator lamination 1, and the stator teeth 12 are circumferentially distributed on the outer ring of the lamination ring 11; the stator teeth 12 sequentially include a tooth portion 121 and a tooth shoe portion 122 from inside to outside in the radial direction, and the plurality of tooth shoe portions 122 circumferentially surround to form an outer ring of the stator lamination 1.

The outer side walls of the tooth shoes 122 are formed by multi-segment arc side walls. The multi-section arc sidewall includes central arc sidewall 1222 and first arc sidewall 1221 and second arc sidewall 1223 located on both sides of central arc sidewall 1222, respectively, and first arc sidewall 1221 and second arc sidewall 1223 are bilateral symmetry, and tooth shoe portion 122 gradually decreases in thickness in the direction toward both sides of tooth shoe portion 122 corresponding to first arc sidewall 1221 and second arc sidewall 1223.

The arcs corresponding to the outer edges of the first arc sidewall 1221, the central arc sidewall 1222 and the second arc sidewall 1223 are a first arc 2, a central arc 21 and a second arc 22, respectively; the circle center O corresponding to the central arc 21 coincides with the center of the stator punching sheet 1, the lengths and the radii of the first arc 2 and the second arc 22 are equal, the circle centers coincide with the point A and deviate from the circle center O, the central symmetry line of the first arc 2 and the second arc 22 intersects with the central arc 21 at the intersection point B, and the circle center O, the circle center A and the intersection point B are located on the central symmetry line of the first arc 2 and the second arc 22.

Further, the arc lengths of the first arc 2, the central arc 21 and the second arc 22 are S1, S2 and S3 respectively, and S1, S2 and S3 meet the condition that S2/(S1 + S2+ S3) is not less than 0.65 and not more than 0.75; the lengths of straight lines OA and OB formed by connecting the circle center O with the circle center A and the intersection point B are respectively L1 and L2, and L1 and L2 meet the condition that L1/L2 is more than or equal to 0.6 and less than or equal to 0.8.

In fig. 2, the stator core wound with the winding 34 is nested on the bearing support 33, one end of the rotating shaft 32 is rotatably disposed on the bearing support 33 through a bearing, and the other end of the rotating shaft 32 is fixedly connected with the external motor rotor 31, thereby forming the external rotor motor 3. Through the design of the three-section arc side walls of the tooth boot parts on the stator iron core of the motor, the air gap in the motor is subjected to magnetic density sine, and the leading odd harmonic is reduced, so that a counter electromotive force waveform with lower harmonic amount is obtained, the average air gap is effectively reduced on the premise of ensuring the ideal harmonic content, the performance of the motor is effectively improved, and the vibration amplitude and the noise of the motor are further reduced.

Meanwhile, the fan blade with a central hole is sleeved on the rotating shaft of the outer rotor motor 3 to form the air interchanger. Different blades can be selected according to different requirements, such as axial flow blades, cross-flow blades and centrifugal blades, and correspondingly, the assembled ventilation device comprises an electric fan, air filtering equipment and environmental ventilation equipment.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention should fall within the protection scope of the present invention.

Claims

1. The utility model provides a stator core, is piled up by a plurality of stator punching (1) and forms its characterized in that: the stator punching sheet (1) comprises a punching sheet circular ring (11) and a plurality of stator teeth (12), the punching sheet circular ring (11) is positioned in the middle of the stator punching sheet (1), the circle center of the punching sheet circular ring (11) is superposed with the stator punching sheet (1), and the stator teeth (12) are circumferentially distributed on the outer ring of the punching sheet circular ring (11);

stator tooth (12) radially from inside to outside includes tooth portion (121) and tooth boots portion (122) in proper order, and is a plurality of tooth boots portion (122) encircle along circumference and form the outer lane of stator punching sheet (1), the lateral wall of tooth boots portion (122) comprises multistage pitch arc lateral wall.

2. A stator core according to claim 1, characterized in that: the tooth shoe part (122) is provided with a plurality of arc side walls, wherein the arc side walls comprise a central arc side wall (1222), and a first arc side wall (1221) and a second arc side wall (1223) which are respectively positioned at two sides of the central arc side wall, the first arc side wall (1221) and the second arc side wall (1223) are arranged in a bilateral symmetry manner, and the thickness of the tooth shoe part (122) corresponding to the first arc side wall (1221) and the second arc side wall (1223) is gradually reduced towards the directions of two sides of the tooth shoe part (122);

the arcs corresponding to the outer edges of the first arc side wall (1221), the central arc side wall (1222) and the second arc side wall (1223) are respectively a first arc (2), a central arc (21) and a second arc (22); the center O corresponding to the central arc (21) coincides with the center of the stator punching sheet (1), the lengths and the radiuses of the first arc (2) and the second arc (22) are equal, the centers of the first arc and the second arc coincide with the point A and deviate from the center O, the central symmetry line of the first arc (2) and the second arc (22) intersects with the central arc (21) at an intersection point B, and the center O, the center A and the intersection point B are located on the central symmetry line of the first arc (2) and the second arc (22).

3. A stator core according to claim 2, characterized in that: the arc lengths of the first arc (2), the central arc (21) and the second arc (22) are S1, S2 and S3 respectively, and S1, S2 and S3 meet the condition that S2/(S1 + S2+ S3) is not less than 0.65 and not more than 0.75; the lengths of straight lines OA and OB formed by connecting the circle center O with the circle center A and the intersection point B are respectively L1 and L2, and L1 and L2 meet the condition that L1/L2 is more than or equal to 0.6 and less than or equal to 0.8.

4. An external rotor electric machine characterized in that: comprising a stator core according to any of claims 1-3, further comprising a motor rotor (31), a rotating shaft (32), a bearing support (33) and a winding (34) wound on the stator core; the stator core is nested on the bearing support seat (33), one end of the rotating shaft (32) is rotatably arranged on the bearing support seat (33), and the other end of the rotating shaft (32) is fixedly connected with the motor rotor (31).

5. A ventilation device, characterized in that: the external rotor electric machine of claim 4, further comprising a fan blade, wherein the fan blade is provided with a central hole and sleeved on the rotating shaft of the external rotor electric machine through the central hole.

6. A ventilation device as defined in claim 5, wherein: the fan blades are axial flow fan blades or cross flow fan blades or centrifugal fan blades.