Special-shaped conductor enameled flat wire for small aircraft motor

Abstract

The utility model relates to a special-shaped conductor enameled flat wire for a small aircraft motor, which comprises a metal wire core and an insulating layer, the metal wire core comprises a rectangular core body and a trapezoidal core body, the rectangular core body is transversely connected with the trapezoidal core body, the lower bottom edge of the trapezoidal core body is connected with the short edge of the rectangular core body, and the insulating layer is arranged between the rectangular core body and the trapezoidal core body. The upper bottom edge of the trapezoidal core body is parallel to the short edge of the rectangular core body, the waist edge of the trapezoidal core body is in arc transition connection with the long edge of the rectangular core body, and the insulating layer wraps the surfaces of the rectangular core body and the trapezoidal core body. The metal wire core adopts the structure of combining the rectangular core body and the trapezoidal core body, the coil height can be reduced and the power density can be improved during winding, so that the space optimization of a small aircraft driving motor is met, the motor mass is reduced, gaps are formed between adjacent wires, and the service life of the motor is prolonged. Heat generated by the wire cores in the working process can be dissipated in time, and stable operation of the motor in a high-temperature environment is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of enameled wires, and particularly relates to a special-shaped conductor enameled flat wire for a small aircraft motor. Background Art

[0002] In aircraft applications, motors usually require efficient, lightweight, and space-compact designs. Therefore, the design and material selection of motor cables are crucial. Since enameled flat wires can provide higher conductivity and flexibility in a limited space, effectively reducing the overall volume and weight of the motor harness, while ensuring the reliability and durability of electrical connections, they are suitable for motor drive systems that require high-power transmission in a limited space. Therefore, the application of special-shaped conductor enameled flat wires for small aircraft drive motors covers the engineering requirements of motor design, space optimization, weight reduction, and high-power transmission, and is one of the key technical fields in electrical system design.

[0003] Existing enameled flat wires, for example, the Chinese utility model patent with the publication number CN219040094U discloses a special-shaped enameled copper flat wire for a photovoltaic power generation inverter, which includes a copper flat wire conductor. The surface of the copper flat wire conductor is coated with a first layer of paint film, the first layer of paint film is coated with a second layer of paint film, and the second layer of paint film is coated with a third layer of paint film. However, when the enameled copper flat wire is wound, the arrangement of each wire is too tight, affecting the heat dissipation of the enameled copper flat wire. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a special-shaped conductor enameled flat wire for a small aircraft motor to solve the problems raised in the background art and improve the heat dissipation performance of the enameled wire.

[0005] The above object of the utility model is achieved by the following technical solutions: A special-shaped conductor enameled flat wire for a small aircraft motor includes a metal wire core and an insulating layer wrapped on the surface of the metal wire core. The metal wire core includes a rectangular core body and a trapezoidal core body. The rectangular core body is horizontally connected to the trapezoidal core body. The lower bottom edge of the trapezoidal core body is connected to the short side of the rectangular core body. The upper bottom edge of the trapezoidal core body is parallel to the short side of the rectangular core body. The waist edge of the trapezoidal core body is connected to the long side of the rectangular core body in an arc transition. The insulating layer is wrapped on the surfaces of the rectangular core body and the trapezoidal core body.

[0006] Preferably, the width of the trapezoidal core body is 1 / 2 of the width of the rectangular core body.

[0007] Preferably, the cross-sectional shape of the trapezoidal core body is an isosceles trapezoid.

[0008] Preferably, the length of the upper bottom edge of the trapezoidal core body is 1 / 2 of the length of the short side of the rectangular core body.

[0009] Preferably, an arc chamfer is provided at the connection of the long side and the short side of the rectangular core.

[0010] Preferably, a groove is provided at the connection of the upper base and the waist side of the trapezoidal core, and the insulating layer is filled in the groove.

[0011] Preferably, the insulating layer includes an inner paint film, an outer paint film and a glass fiber wrapping layer. The inner paint film is a polyamide-imide (PAI) paint film, the outer paint film is a polyester (PE) paint film, and the glass fiber wrapping layer is formed by wrapping glass fibers outside the outer paint film.

[0012] Advantages of the present utility model:

[0013] The metal wire core of the present utility model adopts a structure combining a rectangular core and a trapezoidal core. During winding, it can not only reduce the coil height, improve the power density, thus meeting the optimization of the space of the drive motor for small aircraft and reducing the motor mass, but also form gaps between adjacent wires, which helps to timely dissipate the heat generated by the wire core during operation, ensuring the stable operation of the motor in a high-temperature environment. Description of the drawings

[0014] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0015] Figure 2 is a cross-sectional view of the metal wire core in Embodiment 1 of the present utility model;

[0016] In the figure: 1 - metal wire core, 101 - rectangular core, 102 - trapezoidal core, 103 - arc chamfer, 104 - groove, 2 - insulating layer, 201 - inner paint film, 202 - outer paint film, 203 - glass fiber wrapping layer. Specific embodiments

[0017] The following further elaborates on the present utility model with reference to the accompanying drawings.

[0018] This specific embodiment is only an interpretation of the present utility model and is not a limitation thereof. After reading this specification, those skilled in the art can make modifications without creative contributions to this embodiment as needed, but as long as it is within the scope of the claims of the present utility model, it is protected by the patent law.

[0019] Embodiment: As Figure 1 and Figure 2As shown in the figure, a special-shaped conductor enameled flat wire for a small aircraft motor includes a metal wire core 1 and an insulating layer 2 wrapped on the surface of the metal wire core 1. The metal wire core 1 includes a rectangular core body 101 and a trapezoidal core body 102. The rectangular core body 101 is transversely connected to the trapezoidal core body 102. The lower bottom edge of the trapezoidal core body 102 is connected to the short side of the rectangular core body 101. The upper bottom edge of the trapezoidal core body 102 is parallel to the short side of the rectangular core body 101. The insulating layer 2 is wrapped on the surfaces of the rectangular core body 101 and the trapezoidal core body 102.

[0020] As Figure 2 shown in the figure, the waist edge of the trapezoidal core body 102 is connected to the long side of the rectangular core body 101 on the same side by an arc transition connection, reducing the stress at the connection between the waist edge of the trapezoidal core body 102 and the long side of the rectangular core body 101 of the insulating layer 2.

[0021] An arc chamfer 103 is provided at the connection between the long side and the short side of the rectangular core body 101. The radius of the arc chamfer 103 is 1 / 6 of the length L1 of the short side of the rectangular core body 101.

[0022] Among them, the cross-sectional shape of the trapezoidal core body 102 is an isosceles trapezoid. The width W2 of the trapezoidal core body 102 is 1 / 2 of the width W1 of the rectangular core body 101. The length L2 of the upper bottom edge of the trapezoidal core body 102 is 1 / 2 of the length L1 of the short side of the rectangular core body 101.

[0023] A groove 104 is provided at the connection between the upper bottom edge and the waist edge of the trapezoidal core body 102. The insulating layer 2 is filled in the groove 104, increasing the thickness of the insulating layer 2 at this connection and preventing wear.

[0024] As Figure 1 shown in the figure, the insulating layer 2 includes an inner paint film 201, an outer paint film 202 and a glass fiber wrapping layer 203. The inner paint film 201 is a polyamide-imide PAI paint film. The outer paint film 202 is a polyester PE paint film. The glass fiber wrapping layer 203 is wrapped by glass fibers outside the outer paint film 202. In this embodiment, by providing the glass fiber wrapping layer 203 on the outer paint film 202, the wear resistance of the enameled flat wire is effectively improved.

Claims

1. A special-shaped conductor enameled rectangular wire for a small aircraft motor, comprising a metal wire core (1) and an insulating layer (2) wrapped around the surface of the metal wire core (1), characterized in that: The metal wire core (1) comprises a rectangular core (101) and a trapezoidal core (102); the rectangular core (101) is connected to the trapezoidal core (102) in a transverse manner; the lower base of the trapezoidal core (102) is connected to the short side of the rectangular core (101); the upper base of the trapezoidal core (102) is parallel to the short side of the rectangular core (101); the waist of the trapezoidal core (102) is connected to the long side of the rectangular core (101) in a circular arc transition; and the insulating layer (2) is wrapped around the surfaces of the rectangular core (101) and the trapezoidal core (102).

2. The special-shaped conductor enameled rectangular wire for small aircraft motors according to claim 1, characterized in that: The width of the trapezoidal core (102) is 1 / 2 of the width of the rectangular core (101).

3. The special-shaped conductor enameled rectangular wire for small aircraft motors according to claim 1, characterized in that: The cross-sectional shape of the trapezoidal core (102) is an isosceles trapezoid.

4. The special-shaped conductor enameled rectangular wire for small aircraft motors according to claim 3, characterized in that: The length of the upper base of the trapezoidal core (102) is 1 / 2 of the length of the short side of the rectangular core (101).

5. The special-shaped conductor enameled rectangular wire for small aircraft motors according to claim 1, characterized in that: A circular arc chamfer (103) is provided at the connection between the long side and the short side of the rectangular core (101).

6. The special-shaped conductor enameled rectangular wire for small aircraft motors according to claim 1, characterized in that: A groove (104) is provided at the connection between the upper bottom edge and the waist edge of the trapezoidal core (102), and the insulating layer (2) is filled in the groove (104).

7. The special-shaped conductor enameled rectangular wire for small aircraft motors according to claim 1, characterized in that: The insulating layer (2) comprises an inner paint film (201), an outer paint film (202) and a glass fiber wrapping layer (203); the inner paint film (201) is a polyamide-imide (PAI) paint film, the outer paint film (202) is a polyester (PE) paint film, and the glass fiber wrapping layer (203) is composed of glass fibers wrapped around the outer side of the outer paint film (202).

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