CN-122001126-A - Flat wire and stator of flat wire motor

CN122001126ACN 122001126 ACN122001126 ACN 122001126ACN-122001126-A

Abstract

The invention provides a flat wire and a stator of a flat wire motor, wherein the flat wire comprises a first straight line segment, a first circular arc segment, a first sinking segment, a winding segment, a second sinking segment, a second circular arc segment and a second straight line segment which are sequentially connected, the first straight line segment, the first circular arc segment, the first sinking segment, the second circular arc segment and the second straight line segment take the winding segment as a center to form a U-shaped structure, the first straight line segment and the second straight line segment are respectively inserted into two iron core grooves with preset distance as opposite sides of the U-shaped structure, the winding segment is S-shaped, and the first straight line segment and the second straight line segment are arranged in adjacent layers of the iron core grooves through the winding segment.

Inventors

HUANG FENG
WEI XIONGQIANG
GU YONG

Assignees

华域汽车电动系统(上海)有限公司

Dates

Publication Date: 20260508
Application Date: 20241107

Claims (14)

1. The flat wire is applied to a stator winding of a flat wire motor and is matched with a stator iron core of the flat wire motor, and a plurality of evenly distributed iron core grooves are formed in the stator iron core, and is characterized by comprising a first straight line segment, a first circular arc segment, a first sinking segment, a winding segment, a second sinking segment, a second circular arc segment and a second straight line segment which are sequentially connected, wherein the first straight line segment, the first circular arc segment, the first sinking segment, the second circular arc segment and the second straight line segment take the winding segment as a center to form a U-shaped structure, The first straight line segment and the second straight line segment are used as opposite sides of the U-shaped structure; the winding section is S-shaped; The first straight line segment and the second straight line segment are respectively used for being inserted into two iron core grooves with a preset distance, and the first straight line segment and the second straight line segment are arranged in adjacent layers of the iron core grooves through the winding segment; The method comprises the steps of defining the axial direction of a stator core as the up-down direction, defining the direction of inserting a first straight line segment into a core slot as the down direction, defining the height of the lowest point of the upper surface of a first sinking section to be lower than the height of a first target line segment in the axial direction of the stator core, and defining the height of the lowest point of the upper surface of a second sinking section to be lower than the height of a second target line segment, wherein the first target line segment is a connecting line between the upper end of a bent winding section close to the end of a first circular arc section and the upper end of the first circular arc section close to the end of the first straight line segment, and the second target line segment is a connecting line between the upper end of the bent winding section close to the end of a second circular arc section and the upper end of the second circular arc section close to the end of the second straight line segment.
2. The flat wire according to claim 1, wherein a height of the first sinker upper surface is lower than a height of the first target wire segment in an axial direction of the stator core, and a height of the second sinker upper surface is lower than a height of the second target wire segment.
3. The flat wire according to claim 1, wherein the first circular arc segment, the first sinker segment, the winding segment, the second sinker segment, and the second circular arc segment are inclined to a side away from an axial direction of the stator core.
4. The flat wire according to claim 1, wherein the first arc segment and the second arc segment are located on two coaxial curved surfaces, and a gap between the two coaxial curved surfaces satisfies a preset condition.
5. The flat wire according to claim 4, wherein the preset condition is greater than or equal to 0.2mm.
6. The flat wire according to claim 1, wherein any one or two or more of the following combined angles are obtuse angles, wherein the angle is formed by a connection line between two ends of the first arc section and a connection line between two ends of the first sinking section, the angle is formed by a connection line between two ends of the second arc section and a connection line between two ends of the second sinking section, the angle is formed by a connection line between two ends of the first sinking section and a connection line between two ends of the winding section, and the angle is formed by a connection line between two ends of the second sinking section and a connection line between two ends of the winding section.
7. The flat wire of claim 1, wherein the first straight line segment is connected to the first circular arc segment by a first transition segment, and wherein the second straight line segment is connected to the second circular arc segment by a second transition segment.
8. A stator of a flat wire motor is characterized by comprising a stator winding and a stator core, wherein the stator winding is arranged on the stator core, The stator winding comprises a plurality of flat wires according to any one of claims 1 to 7, and is formed by stacking the flat wires one on top of the other in core slots of the stator core.
9. The stator of the flat wire motor according to claim 8, wherein a layer of the flat wire where the winding section of the flat wire is located farthest from the axis of the stator core is defined as an outermost layer, a layer of the flat wire where the winding section of the flat wire is located closest to the axis of the stator core is defined as an innermost layer, and an inclination angle of the first arc section, the first dip section, the winding section, the second dip section, and the second arc section of the flat wire toward a side away from the axis direction of the stator core in the circumferential direction of the stator core is sequentially decreased along the outermost layer toward the innermost layer.
10. The stator of the flat wire motor according to claim 8, wherein two flat wires adjacent to one flat wire are defined as a first adjacent wire and a second adjacent wire, respectively, in a circumferential direction of the stator core, a first arc section and a first sinking section of one flat wire are located directly above the first arc section and the first sinking section of the first adjacent wire, and are located directly below the first arc section and the first sinking section of the second adjacent wire, and a second arc section and a second sinking section of one flat wire are located directly below the second arc section and the second sinking section of the first adjacent wire, and are located directly above the second arc section and the second sinking section of the second adjacent wire, respectively.
11. The stator of a flat wire motor according to claim 8, wherein the heights of the winding sections of any two adjacent flat wires are uniform in the circumferential direction of the stator core.
12. The stator of a flat wire motor according to claim 8, wherein the bent segments of any two adjacent flat wires are located on the same circumference in the circumferential direction of the stator core.
13. The stator of a flat wire motor according to claim 8, wherein a lowest point of a winding section of one flat wire is higher than a highest point of a first arc section or a second arc section of an adjacent flat wire in a circumferential direction of the stator core.
14. The stator of a flat wire motor according to claim 8, wherein a minimum distance of a winding section of any two adjacent flat wires in a radial direction of the stator core in a circumferential direction of the stator core is greater than or equal to a gap of the adjacent two flat wires in the radial direction of the stator core in the core slot.

Description

Flat wire and stator of flat wire motor Technical Field The invention relates to the field of new energy motors, in particular to a flat wire motor, and particularly relates to a motor stator, in particular to a flat wire and a stator of the flat wire motor. Background At present, a flat wire motor is adopted by a new energy motor, along with the development of new energy, the performance requirement on the flat wire motor is higher and higher, the existing flat wire motor adopts modes such as HAIR-PIN and the like, the end part height is higher, the hairpin wire of the flat wire motor is in a V shape, the V-shaped molding structure is simple, the manufacturing process is simple, but the end part height of the motor is further increased, the mutual interference between copper wires cannot be avoided when the motor is jumped, the mutual interference between copper wires is avoided, and the problem of the mutual interference between copper wires is solved by improving the end part height, so that the integral end part of the motor is higher. Disclosure of Invention The present invention is directed to a flat wire and a stator for a flat wire motor for solving the problems noted in the background art. The flat wire comprises a first straight line segment, a first circular arc segment, a first sinking segment, a winding segment, a second sinking segment, a second circular arc segment and a second straight line segment which are sequentially connected; the first straight line segment, the first circular arc segment and the first sinking segment are respectively used for being inserted into two iron core grooves at a preset distance, the first straight line segment and the second straight line segment are arranged in adjacent layers of the iron core grooves through the winding segments, the axial direction of the stator iron core is defined as the upper and lower direction, the direction of inserting the first straight line segment into the iron core grooves is defined as the lower direction, the height of the lowest point of the upper surface of the first sinking segment is lower than the height of a first target segment in the axial direction of the stator iron core, the height of the lowest point of the upper surface of the second sinking segment is lower than the height of the first target segment, the height of the highest point of the upper surface of the second sinking segment is lower than the height of the first target segment, the second straight line segment is close to the upper end of the first circular arc segment, the first circular arc segment is close to the upper end of the first arc segment, and a connecting line between the second circular arc section and the upper end of the second straight line section, which is close to the end part of the second straight line section. According to the novel flat wire structure, through the design of the first sinking section and the second sinking section, the height of the end part of the flat wire motor can be effectively reduced when the flat wire is applied to the stator winding of the flat wire motor. In an implementation manner of the first aspect, in an axial direction of the stator core, a height of an upper surface of the first sinking section is lower than a height of the first target line segment, and a height of an upper surface of the second sinking section is lower than a height of the second target line segment. In one implementation manner of the first aspect, the first arc segment, the first sinking segment, the winding segment, the second sinking segment, and the second arc segment are inclined to a side away from an axial direction of the stator core. In an implementation manner of the first aspect, the first arc segment and the second arc segment are located on two coaxial curved surfaces, and a gap between the two coaxial curved surfaces meets a preset condition. In the implementation mode, the first arc section and the second arc section are arranged on the two coaxial curved surfaces, the gap between the two coaxial curved surfaces meets the preset condition, the gap between the adjacent first straight line section or second straight line section in the iron core groove is ensured to be small, and therefore the full groove rate of the iron core groove is increased, meanwhile, the large gap at the position of the winding section can be ensured, and the stamping process manufacturing of the flat wire is facilitated. In one implementation manner of the first aspect, the preset condition is greater than or equal to 0.2mm. In one implementation manner of the first aspect, any one or two or more of the following combined included angles are obtuse angles, wherein the included angles are formed by a connecting line between two ends of the first arc section and a connecting line between two ends of the first sinking section, an included angle is formed by a connecting line between two ends of the second arc section and a connecting line betw