An installation and fixing structure of a UAV motor stator slot wedge

Abstract

The utility model discloses an unmanned plane motor stator slot wedge's installation fixed structure, including stator core and casing, the stator core is fixedly installed on the casing through stator slot wedge stop wedge key, the stator core is equal angle and is provided with the core opening slot, the opening of iron core opening slot is installed with the stator slot wedge not higher than the surface of stator core with the clamping plug -in part, the outside of stator core is provided with the flat wire winding that passes through every core opening slot, the utility model discloses by making into the concave structure with stator slot wedge, as far as possible does not squeeze the slot winding space, makes stator slot wedge surface with stator core top surface flush simultaneously, reduces tooth slot torque and noise on electromagnetism, and stator slot wedge itself can be fixed in stator core slot, can play the role of fixed flat wire winding in axial flux motor.

Description

Technical Field

[0001] This utility model belongs to the field of unmanned aerial vehicle (UAV) technology, specifically relating to an installation and fixing structure for a stator slot wedge of an UAV motor. Background Technology

[0002] There are several power supply methods for heavy-duty drones on the market, including high-voltage power supply conversion and direct high-voltage power supply. Powering drones with high-frequency, high-voltage AC reduces the weight of power cables and onboard power conversion equipment, thus improving the payload capacity and takeoff altitude of heavy-duty drones. In recent years, the demand for large, heavy-duty drones has been booming across various industries, especially for drones weighing over 400kg, where the market share has increased rapidly. The power system is one of the most important core systems for drones, but overall, there is relatively little research and development of reliable power systems. The stator slot wedge of a high-voltage drone motor is a component used to fix and install the coils within the slot and optimize the electromagnetic performance of the motor. It can be used on stator cores of various slot types and comes in two types: one is made of non-metallic plastic, which only provides the function of fixing and limiting the coils; the other is made of soft magnetic metallic material, which, while maintaining certain structural mechanical properties, also reduces magnetic field harmonics and optimizes electromagnetic performance.

[0003] With the rapid development of motors, people have increasingly higher requirements for them. Among them, flat wire motors have become the focus of future motor development due to their unique advantages such as high automation, high slot fill rate, high copper wire utilization, and low resistance.

[0004] The straight-open slot design is the optimal stator slot design using flat wire windings. However, existing straight-open slot designs suffer from drawbacks such as uneven air gap magnetic reluctance, large cogging torque, and numerous electromagnetic harmonics. Most current technologies either ignore these defects or design flat pole shoes to compensate for them and optimize the design. However, ordinary flat pole shoes will compress the space of the windings within the slot.

[0005] Therefore, this utility model proposes an installation and fixing structure for the stator slot wedge of a drone motor. Utility Model Content

[0006] The purpose of this utility model is to provide an installation and fixing structure for a stator slot wedge of a drone motor, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an installation and fixing structure for a stator slot wedge of a UAV motor, comprising a stator core and a housing, wherein the stator core is fixedly installed on the housing by a stator slot wedge stop wedge key, wherein the stator core has core opening slots at equal angles, wherein a stator slot wedge not higher than the surface of the stator core is installed at the opening of the core opening slot by a snap-fit ​​connector, and wherein a flat wire winding passing through each core opening slot is provided on the outer side of the stator core.

[0008] Preferably, the engaging connector includes a core groove disposed at the opening of the core slot, and the protruding claws at both ends of the stator slot wedge extend into the corresponding core groove for interference fit.

[0009] Preferably, the two sides of the iron core groove are the lower bottom surface and the upper bottom surface of the iron core groove, respectively. The inner bottom surface of the stator slot wedge has an inwardly concave pagoda-shaped structure. The protruding claws at both ends of the stator slot wedge are in close contact with the upper bottom surface of the iron core groove. A gap of 0.1mm is maintained between the bottom surface of the stator slot wedge on the protruding claws at both ends of the stator slot wedge and the lower bottom surface of the iron core groove.

[0010] Preferably, the space between the bottom surface of the slot wedge and the flat wire winding is filled with insulating slot paper for insulation between the stator slot wedge and the flat wire winding.

[0011] Preferably, the protruding claws at both ends of the stator slot wedge have rounded corners.

[0012] Preferably, the top surface of the stator slot wedge is flush with the surface of the stator core, or the top surface of the stator slot wedge is lower than the surface of the stator core.

[0013] Preferably, the wedge width and wedge length of the stator slot wedge are matched with the width and length of the core groove, respectively.

[0014] Preferably, the two ends of the bottom surface of the core opening slot are rounded chamfered structures.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This invention makes the stator slot wedge into a concave structure to minimize the space occupied by the slot opening for winding, while making the surface of the stator slot wedge flush with the top surface of the stator core. This reduces cogging torque and noise electromagnetically. In addition, the stator slot wedge itself can be fixed in the slot opening of the stator core, and can play the role of fixing the flat wire winding in the axial flux motor. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model; Figure 3 This is an enlarged structural schematic diagram of the stator slot wedge mounting location in cross-section of this utility model; Figure 4 This is a schematic diagram showing the width of the stator slot wedge of this utility model; Figure 5 This is a schematic diagram showing the length of the stator slot wedge of this utility model; Figure 6This is a schematic diagram of the core opening groove structure of this utility model; In the diagram: 1. Stator core; 2. Housing; 3. Stator slot wedge; 4. Stator core surface; 5. Top surface of stator slot wedge; 6. Bottom surface of stator slot wedge; 7. Bottom surface of core groove; 8. Flat wire winding; 9. Stop wedge key; 10. Slot wedge width; 11. Inner bottom surface of slot wedge; 12. Slot wedge length; 13. Top surface of core groove; 14. Core open slot; 15. Bottom surface of core open slot. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example 1 Please see Figures 1 to 6 This utility model provides a technical solution: an installation and fixing structure for a stator slot wedge of a drone motor, including a stator core 1 and a housing 2. The stator core 1 is fixedly installed on the housing 2 by a stator slot wedge stop wedge key 9. The stator core 1 has core opening slots 14 at equal angles. At the opening of the core opening slot 14, a stator slot wedge 3 that is not higher than the surface 4 of the stator core and is concave is installed by a snap-fit ​​connector. A flat wire winding 8 passing through each core opening slot 14 is provided on the outside of the stator core 1. The stator slot wedge 3 is made into a concave structure to minimize the space occupied by the winding in the slot opening. At the same time, the surface of the stator slot wedge 3 is flush with the top surface of the stator core 1, which reduces cogging torque and noise electromagnetically. At the same time, the stator slot wedge 3 itself can be fixed in the stator core slot opening, and can play the role of fixing the flat wire winding 8 in the axial flux motor. In this embodiment, preferably, the snap-fit ​​connector includes a core groove provided at the opening of the core slot 14, and the protruding claws at both ends of the stator slot wedge 3 extend into the corresponding core groove for interference fit, so as to achieve the overall left and right stability after the flat wire winding 8 is pressed and wound.

[0019] In this embodiment, preferably, the two side surfaces of the iron core groove are the lower bottom surface 7 and the upper bottom surface 13 of the iron core groove, respectively. The inner bottom surface 11 of the stator slot wedge 3 has a concave pagoda-shaped structure, which widens the space of the flat wire winding 8 in the slot, and the stator slot wedge 3 obtains a structure similar to an I-beam, which greatly improves the rigidity and strength performance of the stator slot wedge 3 itself. The protruding claws at both ends of the stator slot wedge 3 are tightly fitted with the upper bottom surface 13 of the iron core groove, and a gap of 0.1mm is maintained between the bottom surface 6 of the stator slot wedge on the protruding claws at both ends of the stator slot wedge 3 and the lower bottom surface 7 of the iron core groove, which is convenient for installation and adjustment. In this embodiment, preferably, the space between the inner bottom surface 11 of the slot wedge and the flat wire winding 8 is filled with insulating slot paper for insulation between the stator slot wedge 3 and the flat wire winding 8. In this embodiment, preferably, the protruding claws at both ends of the stator slot wedge 3 have rounded corner structures, which makes it easier to insert into the iron core groove and also makes it easier to wrap with insulating plastic film before insertion. In this embodiment, preferably, the top surface 5 of the stator slot wedge 3 is flush with the surface 4 of the stator core, or the top surface 5 of the stator slot wedge 3 is lower than the surface 4 of the stator core, to avoid the stator core 1 rubbing against the rotor. In this embodiment, preferably, the slot wedge width 10 and slot wedge length 12 of the stator slot wedge 3 are matched with the width and length of the core groove, respectively. In this embodiment, preferably, the bottom surface 15 of the core opening slot 14 has rounded chamfers at both ends. In this embodiment, multilayer soft magnetic metal material is used as the stator slot wedge 3, and the soft magnetic metal material is silicon steel sheet; this can reduce the eddy currents generated inside the stator slot wedge 3 by the rotation of the motor working magnetic field, thereby reducing losses and improving efficiency; choosing the same material for the stator slot wedge 3 and the stator core 1 reduces contact resonance during interference contact compared to using different materials.

[0020] Although embodiments of the present invention have been shown and described in detail above, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mounting and fixing structure for a stator slot wedge of a UAV motor, comprising a stator core (1) and a housing (2), characterized in that, The stator core (1) is fixedly installed on the housing (2) by a stator slot wedge stop wedge key (9). The stator core (1) has core opening slots (14) at equal angles. The opening of the core opening slot (14) is fitted with a stator slot wedge (3) that is not higher than the surface (4) of the stator core. The outside of the stator core (1) is provided with flat wire windings (8) that pass through each core opening slot (14).

2. The mounting and fixing structure for a stator slot wedge of a UAV motor according to claim 1, characterized in that, The snap-fit ​​connector includes a core groove provided at the opening of the core opening slot (14), and the protruding claws at both ends of the stator slot wedge (3) extend into the corresponding core groove for interference fit.

3. The mounting and fixing structure for a stator slot wedge of a UAV motor according to claim 2, characterized in that, The two sides of the iron core groove are the lower bottom surface (7) and the upper bottom surface (13) of the iron core groove, respectively. The inner bottom surface (11) of the stator slot wedge (3) has an inwardly concave pagoda-shaped structure. The protruding claws at both ends of the stator slot wedge (3) are closely fitted with the upper bottom surface (13) of the iron core groove. The bottom surface (6) of the stator slot wedge on the protruding claws at both ends of the stator slot wedge (3) maintains a gap of 0.1mm with the lower bottom surface (7) of the iron core groove.

4. The mounting and fixing structure for a stator slot wedge of a UAV motor according to claim 3, characterized in that, The space between the inner bottom surface (11) of the slot wedge and the flat wire winding (8) is filled with insulating slot paper for insulation between the stator slot wedge (3) and the flat wire winding (8).

5. The mounting and fixing structure for a stator slot wedge of a UAV motor according to claim 2, characterized in that, The protruding claws at both ends of the stator slot wedge (3) are all rounded.

6. The mounting and fixing structure for a stator slot wedge of a UAV motor according to claim 2, characterized in that, The top surface (5) of the stator slot wedge (3) is flush with the surface (4) of the stator core, or the top surface (5) of the stator slot wedge (3) is lower than the surface (4) of the stator core.

7. The mounting and fixing structure for a stator slot wedge of a UAV motor according to claim 2, characterized in that, The wedge width (10) and wedge length (12) of the stator slot wedge (3) are matched with the width and length of the iron core groove, respectively.

8. The mounting and fixing structure for a stator slot wedge of a UAV motor according to claim 2, characterized in that, The bottom surface (15) of the iron core opening groove (14) has rounded chamfered ends.

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