Stator assembly and axial magnetic field motor

Abstract

The present invention discloses a stator assembly and an axial magnetic field motor. The stator assembly includes a housing, a stator core, a coil, a pole shoe, and a stator cover. The stator core, the coil, and the pole shoe are arranged in a space enclosed by the housing and the stator cover; the coil is arranged in an open slot of the stator core; and the pole shoe is fixed to the stator cover. When the stator cover is docked with the housing, the pole shoe can be arranged at the notch of the open slot. The stator core in the present invention has an open slot, which facilitates the installation of the coil. At the same time, the pole shoe is fixed to the stator cover. When the stator cover is docked with the housing, the pole shoe corresponds to the notch of the open slot, which can reduce the tooth harmonics of the motor, reduce the iron loss of the motor, improve the efficiency of the motor, and reduce the torque pulsation of the motor. Since the pole shoe is carried on the stator cover, during assembly, after the stator cover and the housing are directly docked, the pole shoe can cooperate with the open slot, thereby improving the production efficiency of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and more particularly to a stator assembly and an axial magnetic field motor. Background Art

[0002] Existing automotive drive motors operate under complex conditions. Due to their inherent structural characteristics, various losses occur during operation, causing overheating. To facilitate coil installation, the slots in the stator core are open-slotted, and slot wedges are installed to reduce the level of air-gap harmonics. However, the installation of slot wedges also increases the production efficiency of the generator. Therefore, improving the production efficiency of motors has become a pressing technical problem for those skilled in the art. Summary of the Invention

[0003] In view of this, the technical problem to be solved by the present invention is how to improve the production efficiency of the motor. To this end, the present invention provides a stator assembly and an axial magnetic field motor.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A stator assembly comprises a housing, a stator core, a coil, a pole shoe, and a stator cover, wherein the stator core, the coil, and the pole shoe are arranged in a space enclosed by the housing and the stator cover; the coil is arranged in an open slot of the stator core; the pole shoe is fixed to the stator cover, and when the stator cover is docked with the housing, the pole shoe can be arranged at the notch of the open slot.

[0006] In one embodiment of the present invention, the stator cover is fixed to the housing by screws, pressing plates, welding, riveting or dovetailing.

[0007] In one embodiment of the present invention, the end surface of the stator cover plate close to the stator core is provided with slot ribs extending in the radial direction of the stator cover plate and core slots corresponding to the stator core.

[0008] In one embodiment of the present invention, the number of the slot ribs is equal to the number of the open slots of the stator core, and one pole shoe is provided on both sides of each slot rib.

[0009] In one embodiment of the present invention, the pole shoe extends along the length direction of the stator cover, and in the radial direction of the stator cover, the length of the pole shoe is the same as the length of the slot opening of the open slot.

[0010] In one embodiment of the present invention, the sum of the widths of the slot rib and the pole shoes located on both sides of the slot rib is consistent with the width of the slot opening of the open slot.

[0011] In one embodiment of the present invention, the pole shoe is made of SMC.

[0012] In one embodiment of the present invention, the stator cover is made of a non-magnetic high-strength glass fiber composite material or high-strength plastic.

[0013] In one embodiment of the present invention, the coil is a formed coil.

[0014] In one embodiment of the present invention, an axial magnetic field motor is also disclosed, comprising a stator assembly as described in any one of the above items.

[0015] As can be seen from the above technical solution, the stator core of the present invention has open slots, which facilitate the installation of the coils. Furthermore, the pole shoes are fixed to the stator cover. When the stator cover is docked with the housing, the pole shoes align with the notches of the open slots, thereby reducing the motor's tooth harmonics, lowering iron losses and improving its efficiency, while also reducing torque ripple. Because the pole shoes are supported by the stator cover, they mate with the open slots after the stator cover and housing are directly docked during assembly, thereby improving the motor's production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic diagram of an exploded structure of a stator assembly provided by an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the three-dimensional structure of a stator assembly provided by an embodiment of the present invention;

[0019] Figure 3 A schematic diagram of the structure of a stator cover provided by an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of the three-dimensional structure of a stator core provided by an embodiment of the present invention;

[0021] In the figure, 100 is the housing, 200 is the stator cover, 300 is the stator core, 400 is the coil, 500 is the pole shoe, 201 is the slot rib, 202 is the core tooth slot, 301 is the tooth, and 302 is the open slot. DETAILED DESCRIPTION

[0022] The core of the present invention is to provide a stator assembly and an axial magnetic field motor to improve the production efficiency of the motor.

[0023] Furthermore, the embodiments shown below do not limit the invention described in the claims. Furthermore, all the contents of the configurations shown in the embodiments below are not necessarily required as the solution to the invention described in the claims.

[0024] See also Figures 1 to 4 , the stator assembly in the embodiment of the present invention includes:

[0025] The housing 100, the stator core 300, the coil 400, the pole shoe 500 and the stator cover 200, wherein the stator core 300, the coil 400 and the pole shoe 500 are arranged in the space enclosed by the housing 100 and the stator cover 200; the coil 400 is arranged in the open slot 302 of the stator core 300; the pole shoe 500 is fixed on the stator cover 200, and when the stator cover 200 is docked with the housing 100, the pole shoe 500 can be arranged at the notch of the open slot 302.

[0026] The stator core 300 of the present invention has open slots 302, which facilitate the installation of the coil 400. Meanwhile, the pole shoe 500 is fixed to the stator cover 200. When the stator cover 200 is docked with the housing 100, the notches of the pole shoe 500 and the open slots 302 correspond to each other, thereby reducing the tooth harmonics of the motor, lowering the iron loss of the motor, improving the efficiency of the motor, and reducing the torque ripple of the motor. Because the pole shoe 500 is supported by the stator cover 200, during assembly, after the stator cover 200 and the housing 100 are directly docked, the pole shoe 500 can mate with the open slots 302, thereby improving the production efficiency of the motor.

[0027] It should be noted that the stator cover 200 in the present invention is fixed to the housing 100 by screws, pressure plates, welding, riveting, or dovetails. The stator cover 200 and the housing 100 are provided with mounting holes for screws, positions for pressure plates, rivet holes, and dovetail structures to secure the stator cover 200 to the housing 100.

[0028] The stator core 300 has open slots 302 and teeth 301. The open slots 302 are used to mount the coils 400. Each tooth has an open slot 302 between them. The provision of the open slots 302 facilitates the installation of the coils 400. The coils 400 are formed coils or are wound sequentially around the teeth. The formed coils are formed coils made of flat copper wire or pre-wound round copper wire.

[0029] The stator cover 200 is typically constructed of a non-magnetic, high-strength glass fiber composite material or high-strength plastic (e.g., PPS, PEEK, etc.). The end surface of the stator cover 200 near the stator core 300 is provided with radially extending slot ribs 201 and core slots 202 corresponding to the stator core 300. The provision of the slot ribs 201 and core slots 202 facilitates alignment of the stator cover 200 with the housing 100. The number of slot ribs 201 can be the same as or different from the number of open slots 302. Equaling the number of slot ribs 201 and the number of open slots 302 in the stator core 300 further facilitates alignment of the stator cover 200 with the housing 100. Each slot rib 201 is flanked by a pole shoe 500, which is affixed to each side of the slot rib 201. The remaining core slots 202 mate with the tooth surfaces of the integral core. The thickness of the cover plate of the core tooth groove part needs to be as thin as possible to reduce the air gap between the stator and rotor.

[0030] In one embodiment of the present invention, the pole shoe 500 extends along the length direction of the stator cover 200 . In the radial direction of the stator cover 200 , the length of the pole shoe 500 is the same as the length of the slot opening of the open slot 302 .

[0031] In one embodiment of the present invention, the sum of the widths of the slot rib 201 and the pole shoes 500 located on both sides of the slot rib 201 is consistent with the width of the slot opening of the open slot 302 .

[0032] The pole shoe 500 is molded from SMC ferromagnetic powder or other magnetic conductive powder (such as ferrite powder) and has a rectangular outline.

[0033] The present invention also discloses an axial magnetic field motor, comprising any of the above-mentioned stator assemblies. Since the above-mentioned stator assembly has the above-mentioned beneficial effects, the axial magnetic field motor comprising the above-mentioned stator assembly also has corresponding effects, which will not be described in detail here.

[0034] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stator assembly comprising a housing, a stator core, a coil, a pole shoe and a stator cover, wherein: The stator core, the coil, and the pole shoe are arranged in a space enclosed by the housing and the stator cover; the coil is arranged in an open slot of the stator core, and is characterized in that the pole shoe is fixed to the stator cover, and when the stator cover is docked with the housing, the pole shoe can be arranged at the notch of the open slot; The end surface of the stator cover plate close to the stator core is provided with slot ribs extending radially along the stator cover plate and iron core slots corresponding to the stator core; a pole shoe is provided on both sides of each slot rib, and the sum of the widths of the slot rib and the pole shoes located on both sides of the slot rib is consistent with the width of the slot opening of the open slot.

2. The stator assembly according to claim 1, wherein The stator cover is fixed to the housing by screws, pressing plates, welding, riveting or dovetails.

3. The stator assembly according to claim 1, wherein: The number of the slot ribs is equal to the number of the open slots of the stator core.

4. The stator assembly according to claim 1, wherein: The pole shoe extends along the length direction of the stator cover. In the radial direction of the stator cover, the length of the pole shoe is the same as the length of the slot opening of the open slot.

5. The stator assembly according to claim 1, wherein: The pole shoe is made of SMC.

6. The stator assembly according to claim 1, wherein: The stator cover is made of non-magnetic high-strength glass fiber composite material or high-strength plastic.

7. The stator assembly according to claim 1, wherein: The coil is a formed coil.

8. An axial magnetic field motor, characterized in that: Comprising the stator assembly according to any one of claims 1 to 7.

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