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CN-224233404-U - Stator core of axial flux motor

CN224233404UCN 224233404 UCN224233404 UCN 224233404UCN-224233404-U

Abstract

The utility model relates to the technical field of motors, in particular to an axial flux motor stator core. The stator core of the axial flux motor comprises a plurality of groups of U-shaped single structures, wherein each group of U-shaped single structures is formed by bending sheets stacked together in the thickness direction, each sheet comprises a second part, a first part and a third part which are sequentially connected in the rolling direction, the second part and the third part are respectively folded towards the same side relative to the first part, each group of U-shaped single structures comprises a yoke part and half tooth parts positioned at two ends of the yoke part in the rolling direction, the first parts jointly form the yoke part, the second parts and the third parts respectively form the half tooth parts, the plurality of groups of U-shaped single structures are circularly arranged around the axial direction in the radial plane in the direction of U-shaped openings, and the half tooth parts of two adjacent U-shaped single structures are mutually attached to form stator single teeth.

Inventors

  • HOU MINGJUN
  • WU XUAN
  • ZHENG YUEGUO
  • Sun Shuaitao
  • CHEN WENJIE
  • Feng Lishuai

Assignees

  • 浙江盘毂动力科技有限公司

Dates

Publication Date
20260512
Application Date
20250418

Claims (10)

  1. 1. An axial flux motor stator core, comprising: Each U-shaped single structure (100) is formed by bending sheets (200) stacked together in the thickness direction, each sheet (200) comprises a second part (220), a first part (210) and a third part (230) which are sequentially connected in the rolling direction, and the second part (220) and the third part (230) are respectively bent towards the same side relative to the first part (210); Each group of U-shaped single structures (100) comprises a yoke (110) and half-tooth parts (120) positioned at two ends of the yoke (110) along the rolling direction, wherein a plurality of first parts (210) jointly form the yoke (110), and a plurality of second parts (220) and a plurality of third parts (230) respectively form the half-tooth parts (120); The U-shaped single structures (100) are circularly arranged around the axial direction in a radial plane in the same direction as the axial direction in the direction of the U-shaped openings, and half tooth parts (120) of two adjacent U-shaped single structures (100) are mutually attached to form a stator single tooth.
  2. 2. The axial flux motor stator core according to claim 1, wherein the half-tooth portion (120) has an outer side wall (122) fixedly connected to the other half-tooth portion (120) and an inner side wall (123) disposed opposite to the outer side wall (122), the outer side wall (122) being inclined toward the inner side wall (123) while extending radially from outside to inside along a circle surrounded by the plurality of U-shaped single structures (100).
  3. 3. The stator core of an axial-flux motor according to claim 1, the stator core of the axial flux motor is characterized by further comprising: The slot wedge (300), joint groove (121) has been seted up to half tooth portion (120), slot wedge (300) shutoff U type opening and with joint groove (121) joint is fixed, slot wedge (300) are configured to follow the spacing fixed coil of axial.
  4. 4. The axial flux motor stator core according to claim 3, wherein an end of the second portion (220) away from the first portion (210) in the rolling direction is provided with two first notches (221), the two first notches (221) respectively extend inward in a direction perpendicular to the rolling direction from two outer end surfaces perpendicular to the rolling direction, and the plurality of first notches (221) stacked together in the thickness direction jointly constitute the clamping groove (121); The third portion (230) is provided with a second notch (231) along one end of the rolling direction far away from the first portion (210), the second notch (231) extends inwards along the direction perpendicular to the rolling direction from the outer end face perpendicular to the rolling direction, and a plurality of second notches (231) jointly form the clamping groove (121).
  5. 5. An axial flux electric machine stator core according to claim 3, characterized in that the slot wedge (300) comprises: A wedge body (310), the wedge body (310) being used for limiting and fixing the coil along the axial direction, and First joint portion (320) and second joint portion (330), first joint portion (320) with second joint portion (330) respectively with the both ends that slot wedge main part (310) set up relatively link to each other, half tooth portion (120) are provided with respectively along a plurality of radial both ends that U type monomer structure (100) enclose joint groove (121), first joint portion (320) with second joint portion (330) respectively with joint groove (121) joint is fixed.
  6. 6. The axial flux motor stator core of claim 5, wherein the first clamping portion (320) is provided with a first inserting groove (321), the second clamping portion (330) is provided with a second inserting groove (331), and the slot wedge main body (310) is respectively inserted and fixed with the first inserting groove (321) and the second inserting groove (331).
  7. 7. An axial flux electric machine stator core according to claim 3, characterized in that the slot wedge (300) has a magnetic conducting function.
  8. 8. The stator core of an axial flux motor according to any one of claims 1 to 7, wherein an outer bending curved surface (130) is provided between the half-tooth portion (120) and the yoke portion (110), and an avoidance space is formed between two outer bending curved surfaces (130) in a state where two adjacent half-tooth portions (120) constitute the stator single tooth.
  9. 9. The axial flux motor stator core of any one of claims 1-7, wherein two adjacent U-shaped monolithic structures (100) are welded or adhesively secured.
  10. 10. The axial flux motor stator core according to any one of claims 1 to 7, wherein the sheets (200) stacked together in the thickness direction are welded or adhesively fixed.

Description

Stator core of axial flux motor Technical Field The utility model relates to the technical field of motors, in particular to an axial flux motor stator core. Background The axial flux motor comprises a stator assembly and a rotor assembly which are axially arranged, and the magnetic flux direction of the axial flux motor is axial, as shown in fig. 1, taking the axial flux motor with a double-stator single-rotor structure as an example, and the internal magnetic circuit of the axial flux motor is axially communicated with the existing stator assembly 1 and the existing rotor assembly 2. In the prior art, as shown in fig. 2 to 5, the existing stator assembly 1 includes an existing stator core 11 and a coil winding fixed at the existing stator core 11, and the rotor assembly includes a holder and a permanent magnet fixed on the holder. The existing stator core 11 includes an existing tooth portion 101 and an existing yoke portion 102, the existing stator core 11 is wound and formed by a silicon steel sheet 3 roll-formed in a length direction, and by processing the saw-tooth structure 31 on the silicon steel sheet 3 by punching and shearing, when the silicon steel sheet 3 is wound into the existing stator core 11, the saw-tooth structure 31 can constitute the existing tooth portion 101 for clamping the coil winding. The magnetic circuit in the existing stator core 11 is divided into a first portion located in the existing tooth 101 and perpendicular to the rolling direction of the silicon steel sheet 3 and a second portion located in the existing yoke 102 and parallel to the rolling direction of the silicon steel sheet 3. The silicon steel sheet 3 is known to have the best magnetic properties in the rolling direction, the lowest core loss, the worst magnetic properties in the direction perpendicular to the rolling direction, and the largest core loss. The magnetic properties of the magnetic circuit direction perpendicular to the rolling direction are the worst, and the magnetic properties of the magnetic circuit direction parallel to the rolling direction are the best. The magnetic circuit at the existing tooth 101 greatly affects the performance of the axial flux motor. Accordingly, there is a need for an axial flux motor stator core that solves the above-described problems. Disclosure of utility model The utility model aims to provide an axial flux motor stator core so as to reduce the magnetic loss of the stator core and improve the performance of the axial flux motor. To achieve the purpose, the utility model adopts the following technical scheme: An axial flux motor stator core comprising: Each group of U-shaped single structures is formed by bending sheets stacked together in the thickness direction, each sheet comprises a second part, a first part and a third part which are sequentially connected in the rolling direction, and the second part and the third part are respectively bent towards the same side relative to the first part; Each group of U-shaped single structure comprises a yoke part and half-tooth parts positioned at two ends of the yoke part along the rolling direction, wherein a plurality of first parts jointly form the yoke part, and a plurality of second parts and a plurality of third parts respectively form the half-tooth parts; The U-shaped single structures are circularly arranged around the axial direction in a radial plane in the same direction as the axial direction in the direction of the U-shaped openings, and half tooth parts of two adjacent U-shaped single structures (100) are mutually attached to form a stator single tooth. Alternatively, the half-tooth portion has an outer side wall fixedly connected with other half-tooth portions and an inner side wall opposite to the outer side wall, and the outer side wall is inclined towards a direction close to the inner side wall while extending from outside to inside along a radial direction of a circle surrounded by the plurality of U-shaped single structures. Alternatively, the axial flux motor stator core further includes: The slot wedge is provided with a clamping groove at the half tooth part, the slot wedge seals the U-shaped opening and is fixedly clamped with the clamping groove, and the slot wedge is configured to limit and fix the coil along the axial direction. As an alternative, two first notches are formed at one end, far away from the first portion, of the second portion along the rolling direction, the two first notches respectively extend inwards along the direction perpendicular to the rolling direction from two outer end surfaces perpendicular to the rolling direction, and a plurality of first notches stacked together along the thickness direction form the clamping groove together; The third portion is provided with the second breach along the rolling direction keep away from the one end of first portion, the second breach by perpendicular to the outer terminal surface of rolling direction is inwards extended along the di