Stator winding structure of synchronous motor

Abstract

The utility model discloses a stator winding structure of a synchronous motor, which comprises a plurality of stator sheets and an insulating layer which are sequentially overlapped and connected, the surface of each stator sheet is provided with a plurality of coil notches which are uniformly distributed in the circumferential direction, the inner side of each stator sheet is provided with heat dissipation air channels which are radially arranged, and the heat dissipation air channels are positioned between adjacent coil notches. Connecting wedges and slot wedges located between adjacent coil notches are arranged on the upper surface and the lower surface of the stator piece, and the slot wedges are located on the inner ring surface of the stator piece. According to the utility model, the surface of the stator sheet is provided with the radiating air channel which is radially arranged, and the upper and lower surfaces penetrate through the upper and lower surfaces of the stator sheet, so that airflow can flow through the interior of the winding more smoothly, heat generated in the working process of the winding is effectively taken away, the radiating efficiency is improved, and the winding is prevented from being damaged due to overheating.

Description

Technical Field

[0001] The utility model relates to the technical field of motor stators, in particular to a stator winding structure of a synchronous motor. Background Art

[0002] In the design of traditional synchronous motors, the stator structure is usually composed of multiple layers of stacked stator sheets, and each layer of stator sheets is connected by mechanical fixing to form an integrated stator winding. Slots are usually provided inside the stator sheets to facilitate the arrangement of coils and the installation of windings. However, in traditional technical solutions, the stator sheets often lack an effective heat dissipation channel design, and heat accumulates inside the windings, causing the motor to overheat easily under high load or long-term operation, thereby reducing the performance and service life of the motor. In addition, the insulation layer design between the stator sheets is relatively simple or insufficient, and the insulation effect of the stator winding is poor. The winding is easily damaged due to electromagnetic interference or mechanical friction, affecting the safety and stability of the motor.

[0003] In these traditional technologies, due to inadequate heat dissipation design, the heat generated by the motor during operation is difficult to dissipate effectively, resulting in localized temperature increases in the windings and an increased risk of motor damage. Furthermore, the lack of an isolated mounting structure makes it easy for electromagnetic coupling and magnetic leakage to form between the stator segments, leading to unstable electromagnetic fields, further reducing motor efficiency and affecting the stability of the motor's torque output. Furthermore, the inadequate insulation structure makes it difficult to isolate the current flow between the stator segments, making short circuits or leakage more likely to occur, compromising motor safety. Utility Model Content

[0004] This utility model provides a stator winding structure for a synchronous motor, aiming to improve the problems of poor heat dissipation, poor insulation, and unstable electromagnetic fields in traditional technologies, thereby improving the overall performance and service life of the motor. The structure specifically includes the following:

[0005] The stator winding structure of the present invention comprises a plurality of overlapping stator sheets and an insulating layer. The surfaces of the stator sheets are provided with a plurality of coil slots evenly distributed along the circumference. Radial cooling ducts are arranged on the inner sides of the stator sheets, located between adjacent coil slots. Connecting wedges and slot wedges are provided on both the upper and lower surfaces of the stator sheets, located between adjacent coil slots. The slot wedges are located on the inner surface of the stator sheets. The surface of the insulating layer is provided with holes corresponding to the coil slots, connecting pins, and slot wedges on the stator sheet surface. This structural design ensures that the cooling ducts effectively guide airflow through the winding, quickly removing heat generated during operation, significantly improving heat dissipation efficiency, preventing damage to the stator sheets due to excessive temperatures, and enhancing the stability and reliability of the motor.

[0006] In a preferred embodiment, the present invention can be further configured as follows: the insulating layer is made of a high-temperature and wear-resistant polyimide material, and the surface of the insulating layer is provided with tabs that fit over the inside of the connecting pins to insulate the inner side of the stator segments from the coil windings. The polyimide insulating layer has excellent insulation performance, effectively preventing current leakage and electromagnetic interference between the stator segments and the windings, preventing the risk of short circuits, and extending the life of the motor.

[0007] In a preferred embodiment, the present invention can be further configured such that the upper and lower surfaces of the heat dissipation duct extend through the upper and lower surfaces of the stator segments, and the radial ends of the heat dissipation duct extend through the inner and outer ring walls of the stator segments. This design allows air to flow smoothly within the heat dissipation duct, further improving heat dissipation, ensuring a stable temperature during high-load operation, and extending the life of the windings and the motor as a whole.

[0008] In a preferred embodiment, the present invention can be further configured such that: the surface of the insulation layer is provided with protruding pins adapted to engage with the connecting wedges, and the protruding pins of the insulation layer interlock with the connecting wedges on the upper and lower surfaces of the stator segments. This structural design further stabilizes the connection between the insulation layer and the stator segments, preventing loosening due to vibration or electromagnetic forces, and effectively improving the stability of the motor in high-frequency, high-intensity environments.

[0009] In a preferred embodiment, the present invention can be further configured as follows: the top surface of the stator sheet is provided with a connecting pin, and the bottom surface of the stator sheet is provided with an engaging hole, the connecting pin and the engaging hole being arranged correspondingly and having a matching structure and size, and adjacent stator sheets are connected to each other via the connecting pin and the engaging hole. Adjacent stator sheets are connected to each other via the connecting pin and the engaging hole, thereby preventing the stator sheets in the winding from loosening and misaligning due to electromagnetic force. The slot wedge is used to align the stator winding with the motor housing after it is fixed to the inside of the motor housing, thereby preventing the stator winding from loosening and misaligning due to electromagnetic force during operation.

[0010] The beneficial effects achieved by the utility model are:

[0011] 1. In the present invention, radially arranged heat dissipation ducts are provided on the surface of the stator sheet, and the upper and lower surfaces pass through the upper and lower surfaces of the stator sheet, so that the air flow can flow more smoothly through the interior of the winding, effectively taking away the heat generated during the operation of the winding, improving the heat dissipation efficiency, and avoiding damage to the winding due to overheating.

[0012] 2. In the present invention, the surface of the insulating layer is provided with an ear piece that is sleeved on the inner side of the connecting pin, which effectively isolates the contact between the stator sheet and the coil winding, avoids electromagnetic interference and mechanical friction, thereby improving the insulation effect and extending the service life of the motor. Each layer of stator sheets is isolated and installed by an insulating layer, which can effectively block the current flow between different layers of stator sheets and prevent short circuit or leakage caused by electromagnetic interference. This layer of isolation can also avoid the transmission of electromagnetic oscillations, making the electromagnetic field between the stator sheets more stable, which helps to improve the efficiency and torque stability of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0014] Figure 2 This is a schematic diagram of the stator sheet and insulation layer structure of an embodiment of the present utility model;

[0015] Figure 3 This is a schematic diagram of the surface structure of a stator sheet according to an embodiment of the present invention;

[0016] Figure 4 This is a schematic diagram of the coil slot distribution structure on the stator surface of an embodiment of the present utility model.

[0017] Reference numerals:

[0018] 100, stator sheet; 110, coil slot; 120, heat dissipation duct; 130, connecting wedge; 140, connecting pin; engaging hole 141, engaging hole; 150, slot wedge; 200, insulation layer. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features therein can be combined with each other unless there is any conflict.

[0020] It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention.

[0021] The following is combined with Figures 1-4 Some embodiments of the present invention provide a stator winding structure of a synchronous motor. Example 1

[0022] This embodiment provides a stator winding structure for a synchronous motor, comprising a plurality of stator sheets 100 that are sequentially overlapped and connected, and an insulating layer 200. The surfaces of the stator sheets 100 are provided with a plurality of coil slots 110 evenly distributed along the circumference. Radial heat dissipation ducts 120 are also provided on the inner sides of the stator sheets 100, with the heat dissipation ducts 120 located between adjacent coil slots 110. Furthermore, connecting wedges 130 and slot wedges 150 are provided on both the upper and lower surfaces of the stator sheets 100, located between adjacent coil slots 110. The slot wedges 150 are located on the inner annular surface of the stator sheets 100. The surface of the insulating layer 200 is provided with holes corresponding to the coil slots 110, connecting pins 140, and slot wedges 150 on the surfaces of the stator sheets 100.

[0023] In this structure, the insulation layer 200 is made of high-temperature-resistant and wear-resistant polyimide. It is also equipped with tabs that fit over the inside of the connecting pins 140, providing insulation between the stator segments 100 and the windings. The upper and lower surfaces of the heat dissipation duct 120 extend through the stator segments 100, and the radial ends of the heat dissipation duct 120 extend through the inner and outer ring walls of the stator segments 100, allowing air to flow through the heat dissipation duct 120 and effectively remove heat generated by the windings.

[0024] In addition, the surface of the insulating layer 200 is provided with protruding pins that mate with the connecting wedges 130. These protruding pins interlock with the connecting wedges 130 on the upper and lower surfaces of the stator segments 100 to ensure a stable connection between each layer of stator segments 100 and the insulating layer 200. Adjacent stator segments 100 are interconnected via the connecting pins 140 at the top and the engaging holes 141 at the bottom, forming a stable structure that prevents loosening and misalignment caused by electromagnetic forces.

[0025] The design of this embodiment ensures that the insulating layer 200 between the stator segments 100 not only provides isolation but also enhances insulation, ensuring stable current flow and preventing short circuits or leakage. Furthermore, the through-hole heat dissipation duct 120 improves heat dissipation efficiency, effectively extending the motor's service life. Example 2

[0026] This embodiment further improves the structure of the stator winding based on the first embodiment, and optimizes the heat dissipation and installation method in particular.

[0027] In this embodiment, the overlapping stator sheets 100 and insulation layers 200 are arranged according to the structure of Embodiment 1, but the design of the heat dissipation duct 120 has been optimized. In this embodiment, the radial width of the heat dissipation duct 120 is increased, making the air flow path wider and facilitating more efficient heat dissipation under high load conditions.

[0028] In addition, multiple tabs have been added to the surface of the insulation layer 200, matching the inner sides of the connecting pins 140. This provides more stable insulation support, further enhancing the stability of the entire structure under electromagnetic forces. Furthermore, the connection between adjacent stator segments 100 has been optimized. By using a locking mechanism between the connecting pins 140 and the engagement holes 141, adjacent stator segments 100 can fit more tightly together to cope with high-speed rotation or severe vibration environments.

[0029] Through the improved design of this embodiment, the stator winding structure of the present utility model exhibits even better heat dissipation performance and mechanical stability under high-temperature, high-load, and high-speed rotation conditions. Further insulation enhancement and structural reinforcement enable the motor to maintain efficient and stable operation even during long-term operation, effectively extending its service life.

[0030] Throughout this specification, terms such as "one embodiment," "some embodiments," or "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative uses of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0031] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A stator winding structure of a synchronous motor, characterized in that: include: A plurality of stator sheets (100) and an insulating layer (200) are overlapped and connected in sequence, wherein the surface of the stator sheet (100) is provided with a plurality of coil slots (110) uniformly distributed in a circumferential direction, and the inner side of the stator sheet (100) is provided with a radially arranged heat dissipation duct (120), and the heat dissipation duct (120) is located between adjacent coil slots (110). The upper and lower surfaces of the stator sheet (100) are both provided with a connecting wedge (130) and a slot wedge (150) located between adjacent coil slots (110), and the slot wedge (150) is located on the inner ring surface of the stator sheet (100). The surface of the insulating layer (200) is provided with holes corresponding to the coil slots (110), the connecting pins (140) and the slot wedge (150) on the surface of the stator sheet (100).

2. The stator winding structure of a synchronous motor according to claim 1, characterized in that: The insulating layer (200) is made of a high-temperature-resistant and wear-resistant polyimide material. The surface of the insulating layer (200) is provided with an ear piece sleeved on the inner side of the connecting pin (140) for insulating the inner side of the stator sheet (100) from the coil winding.

3. The stator winding structure of a synchronous motor according to claim 1, characterized in that: The upper and lower surfaces of the heat dissipation duct (120) pass through the upper and lower surfaces of the stator sheet (100), and radial ends of the heat dissipation duct (120) pass through the inner ring wall and the outer ring wall of the stator sheet (100).

4. The stator winding structure of a synchronous motor according to claim 1, characterized in that: The surface of the insulating layer (200) is provided with convex pins adapted to the connecting wedges (130), and the convex pins of the insulating layer (200) are buckled with the connecting wedges (130) on the upper and lower surfaces of the stator sheet (100).

5. The stator winding structure of a synchronous motor according to claim 1, characterized in that: The top surface of the stator plate (100) is provided with a connecting pin (140), and the bottom surface of the stator plate (100) is provided with an engaging hole (141), the connecting pin (140) and the engaging hole (141) are arranged correspondingly to each other and have adapted structures and sizes, and adjacent stator plates (100) are connected to each other via the connecting pin (140) and the engaging hole (141).

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