Motor insulation sheet and motor unit comprising the same

Abstract

This utility model relates to the field of insulating sheet technology, and discloses a motor insulating sheet and a motor unit including the insulating sheet. The motor insulating sheet includes a first side and two second side for insulating separation between the stator core and the enameled wire. The two second side are rotatably connected to both sides of the first side. In this utility model, the limiting plate is bent outwards at a 90° angle to the reinforcing plate. This 90° angle ensures that the lower surface of the limiting plate abuts against the end face of the motor stator, thus confining the position of the motor insulating sheet within the stator slot. This design prevents the enameled wire coil from shifting position when wound inside the motor insulating sheet, ensuring that the enameled wire coil does not loosen and thus guaranteeing the electromagnetic performance and efficiency of the motor.

Description

Technical Field

[0001] This utility model relates to the field of insulating sheet technology, and in particular to motor insulating sheets and motor units including the insulating sheets. Background Technology

[0002] Motor insulation sheets are electrical insulating materials used in motors to isolate different conductors or circuits, primarily to prevent current leakage and avoid short circuits or electrical faults. They are typically made of high-temperature and voltage-resistant insulating materials, commonly including polyimide film (PI film), phenolic paper, fiberglass, and other composite materials. In a motor unit, insulation sheets mainly isolate current paths: they ensure electrical isolation between different components within the motor, preventing electrical interference and short circuits. Heat resistance is crucial: motors generate a significant amount of heat during operation, requiring insulation sheets to possess a certain degree of high-temperature resistance to ensure stable operation even in high-temperature environments. Improved motor efficiency and stability: good insulation reduces energy loss, improves motor operating efficiency, and extends motor lifespan.

[0003] The existing motor insulation sheets are directly inserted into the stator slots of the stator. When the enameled wire coil is wound onto the stator slots, the enameled wire often causes the motor insulation sheet to slide up and down along the direction of the stator slot, resulting in the enameled wire coil becoming loose in the stator slot, affecting the electromagnetic performance of the motor and reducing the efficiency of the motor. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a motor insulation sheet and a motor unit including the insulation sheet.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] Motor insulation sheets, including:

[0007] The first side and the two second sides are used together for insulation between the stator core and the enameled wire. The two second sides are rotatably connected to both sides of the first side. The two second sides are close to each other and folded together with the first side to form a trapezoidal shape.

[0008] A reinforcing sheet is used to reinforce the outer surface of the top and bottom ends of the second side. The reinforcing sheet is disposed at the top and bottom ends of the two second side and is rotatably connected to them. The reinforcing sheet is provided in a first state and a second state. When the reinforcing sheet is in the first state, it is disposed on the same plane as the second side. When the reinforcing sheet is in the second state, it is attached to the outer surface of one side of the second side.

[0009] A limiting piece is used to limit the installation position of the motor insulation sheet on the stator core, and the limiting piece is connected to the reinforcing piece.

[0010] As a further embodiment of this utility model, the reinforcing sheet is bent outwards to fit against the outer surface of the second side near the top and bottom ends.

[0011] As a further embodiment of this utility model, the limiting piece is rotatably connected to the reinforcing piece, and the limiting piece is bent outward to limit the installation position of the motor insulation sheet.

[0012] As a further embodiment of this utility model, the first side and the two second sides are integrally formed, and the reinforcing piece, the limiting piece and the first side are integrally formed.

[0013] As a further embodiment of this utility model, the angle between the limiting piece and the reinforcing piece after the limiting piece is bent outward is 90°.

[0014] The motor unit includes a motor stator, which is arranged in a circular shape. The inner wall of the motor stator has multiple stator slots at equal intervals, and motor insulating sheets are inserted into the inner wall of each of the multiple stator slots.

[0015] As a further embodiment of this utility model, an enameled wire coil is wound between two adjacent stator slots, and the enameled wire coil is disposed inside the motor insulation sheet, so that the enameled wire coil is insulated from the motor stator through the motor insulation sheet.

[0016] After the limiting plate is bent outward, the angle between it and the reinforcing plate is 90°. This 90° setting ensures that the lower surface of the limiting plate abuts against the end face of the motor stator, thus restricting the position of the motor insulation sheet inside the stator slot. This design prevents the enameled wire coil from shifting position when it is wound inside the motor insulation sheet, as the insulation sheet is already positioned. This ensures that the enameled wire coil does not loosen, thereby guaranteeing the electromagnetic performance and efficiency of the motor. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a motor stator with insulating sheets in the prior art of this utility model.

[0018] Figure 2 This is a schematic diagram of the folded structure of the motor insulation sheet proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the folded structure of the motor insulation sheet proposed in this utility model;

[0020] Figure 4 This is a planar unfolded schematic diagram of the motor insulation sheet proposed in this utility model;

[0021] Figure 5This is a top view of the motor insulation sheet proposed in this utility model.

[0022] In the diagram: 1. Motor stator; 101. Stator slot; 201. First side; 202. Second side; 203. Reinforcing plate; 204. Limiting plate. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] like Figure 1 - Figure 2 As shown, this embodiment provides a motor insulating sheet, including:

[0025] The first side 201 and the two second sides 202 together serve as an insulating barrier between the stator core and the enameled wire. The two second sides 202 are rotatably connected to both sides of the first side (201), as shown below. Figure 5 As shown, the two second side surfaces 202 fold together and form a trapezoidal shape with the first side surface 201. The trapezoidal shape is matched and installed with the inner wall of the stator core. At the same time, the trapezoidal shape formed by the two second side surfaces 202 and the first side surface 201 facilitates the internal winding of enameled wire and avoids direct contact between the enameled wire and the stator core.

[0026] like Figure 2 and Figure 3 As shown, the reinforcing piece 203 is used to reinforce the outer surfaces of the top and bottom ends of the second side 202 to prevent the outer surfaces of the top and bottom ends of the second side 202 from being crushed during the winding of the enameled wire, which would cause the enameled wire to come into direct contact with the outer surface of the stator core.

[0027] Reinforcing plates 203 are disposed at the top and bottom ends of the two second side surfaces 202 and are rotatably connected thereto. The reinforcing plates 203 have a first state and a second state, such as... Figure 2 As shown, when the reinforcing plate 203 is in the first state, it is positioned on the same plane as the second side 202, facilitating its insertion into the stator core. Figure 3 As shown, when the reinforcing sheet 203 is in the second state, it is attached to the outer surface of one side of the second side 202. At this time, the second side 202 and the reinforcing sheet 203 will have overlapping surfaces.

[0028] In this embodiment, as Figure 3 As shown, the reinforcing sheet 203 is bent outward and fits against the outer surface of the second side 202 near the top and bottom, which can thicken the outer surface of the top and bottom of the second side 202, thereby strengthening the support of the top and bottom of the second side 202 to support the enameled wire coil.

[0029] The limiting piece 204 is used to limit the installation position of the motor insulation sheet in the stator core and prevent the motor insulation sheet from sliding inside the stator core. The limiting piece 204 is connected to the reinforcing piece 203.

[0030] In this embodiment, as Figure 3 As shown, the limiting piece 204 is rotatably connected to the reinforcing piece 203. The limiting piece 204 is bent outward to limit the installation position of the motor insulation piece. After the limiting piece 204 is bent outward, the angle between it and the reinforcing piece 203 is 90°. By setting the 90° angle, the lower surface of the limiting piece 204 abuts against the end face of the motor stator 1, thereby limiting the position of the motor insulation piece inside the stator slot 101. Through this setting, when the enameled wire coil is wound inside the motor insulation piece, the position of the motor insulation piece is limited and will not be driven by the enameled wire coil to cause positional displacement, ensuring that the enameled wire coil will not loosen, thereby ensuring the electromagnetic performance and efficiency of the motor. The lower surface of the limiting piece 204 can be coated with insulating glue for pasting onto the end face of the motor stator 1, which facilitates the fixing of the limiting piece 204.

[0031] In this embodiment, as Figure 4 As shown, the first side 201 and the two second sides 202 are integrally formed structures. The reinforcing piece 203, the limiting piece 204 and the first side 201 are also integrally formed structures, which facilitates direct stamping during actual production and can be folded for subsequent use, making production and use convenient.

[0032] like Figure 1 As shown, this embodiment provides a motor unit, including a motor stator 1, which is arranged in a circular shape. The inner wall of the motor stator 1 has multiple stator slots 101 evenly spaced, such as... Figure 1 As shown, motor insulating sheets are inserted into the inner walls of multiple stator slots 101, and enameled wire coils are wound between two adjacent stator slots 101. The enameled wire coils are located inside the motor insulating sheets, so that the enameled wire coils are insulated from the motor stator 1 through the motor insulating sheets.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An electrical machine insulation sheet, characterized by include: The first side (201) and the two second side (202) are used together for insulation between the stator core and the enameled wire. The two second side (202) are rotatably connected to both sides of the first side (201). The two second side (202) are close to each other and folded together with the first side (201) to form a trapezoidal shape. A reinforcing piece (203) is used to reinforce the outer surface of the top and bottom ends of the second side (202). The reinforcing piece (203) is disposed at the top and bottom ends of the two second side (202) and rotatably connected thereto. The reinforcing piece (203) is provided in a first state and a second state. When the reinforcing piece (203) is in the first state, it is disposed on the same plane as the second side (202). When the reinforcing piece (203) is in the second state, it is attached to the outer surface of one side of the second side (202). The limiting piece (204) is used to limit the installation position of the motor insulation sheet in the stator core, and the limiting piece (204) is connected to the reinforcing piece (203).

2. The electrical machine insulation sheet of claim 1, wherein, The reinforcing sheet (203) is bent outward to fit against the outer surface of the second side (202) near the top and bottom.

3. The electrical machine insulation sheet of claim 2, wherein, The limiting piece (204) is rotatably connected to the reinforcing piece (203), and the limiting piece (204) is bent outward to limit the installation position of the motor insulation sheet.

4. The electrical machine insulation sheet of claim 3, wherein, The first side (201) and the two second side (202) are integrally formed structures, and the reinforcing piece (203), the limiting piece (204) and the first side (201) are integrally formed structures.

5. The motor insulating sheet according to claim 4, characterized in that, The angle between the limiting piece (204) and the reinforcing piece (203) after the limiting piece (204) is bent outward is 90°.

6. A motor unit, comprising a motor stator (1), the motor stator (1) being arranged in an annular shape, wherein a plurality of stator slots (101) are equidistantly provided on the inner wall of the motor stator (1), characterized in that, The inner walls of the plurality of stator slots (101) are each provided with an electric motor insulating sheet according to any one of claims 1-5.

7. The electric machine unit of claim 6, wherein, An enameled wire coil is wound between two adjacent stator slots (101). The enameled wire coil is located inside the motor insulation sheet, so that the enameled wire coil is insulated from the motor stator (1) through the motor insulation sheet.

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