Winding isolation device and motor
By designing a winding isolation device including an isolation plate, an isolation rib and a reinforcement rib, the problem that the prior art cannot simultaneously isolate and protect the motor winding coil and the exposed copper area, and effective protection and stable isolation protection of phase-to-phase high voltage are achieved.
Patent Information
- Application Number
- CN202421869618.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-05
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-08-05
AI Technical Summary
The prior art cannot simultaneously achieve isolation protection of motor winding coils, preventing interphase high voltage from breaking through adjacent windings, and protecting the exposed copper area at the winding lead end.
A winding isolation device is designed, including an isolation plate, an isolation rib and a reinforcement rib. The isolation plate covers the exposed area of the copper row, and the isolation ribs are spaced apart on one side of the isolation plate to form an isolation zone, increasing the creepage distance and gap between adjacent lead-out ends; the reinforcement ribs and the isolation ribs are arranged staggered to enhance the overall structure of the isolation plate.
Effectively separate the winding lead-out ends of the motor stator to prevent phase-to-phase high voltage from breaking through adjacent windings, and at the same time isolate and protect the exposed copper area, ensuring stable and continuous isolation and protection.
Smart Images
Figure CN222884428U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a winding isolation device and a motor. Background Art
[0002] In the motor, the lead-out end of the winding needs to be connected to the busbar interface through a copper busbar. The busbar interface refers to the UVW three-phase interface, and the copper busbar refers to the copper wire used to connect the lead-out end of the winding to the busbar interface. Due to process reasons, the copper busbar has openings, resulting in copper exposure, which requires isolation protection.
[0003] In addition, there is interphase high voltage between the lead-out ends of adjacent windings, which requires isolation protection. Otherwise, the interphase high voltage may easily break through the adjacent windings.
[0004] Currently, there is no suitable winding isolation device that can simultaneously isolate the winding coils to prevent the interphase high voltage from breaking down the adjacent windings and protect the exposed copper area of the winding lead-out terminal.
[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the utility model, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content
[0006] In view of this, the utility model provides a winding isolation device and a motor, which can effectively separate the lead-out ends of the windings of the motor stator, prevent the phase-to-phase high voltage from breaking down adjacent windings, and at the same time isolate and protect the exposed copper area, and can achieve stable and continuous isolation protection.
[0007] One aspect of the utility model provides a winding isolation device, which is arranged at the lead-out end of the winding, and the lead-out end is connected to the busbar interface through a copper busbar; the winding isolation device includes: an isolation plate, covering the exposed copper area of the copper busbar; isolation ribs and reinforcement ribs, which are arranged on two opposite sides of the isolation plate, and the isolation ribs and the reinforcement ribs respectively include a plurality of spaced-apart ribs, wherein an isolation area for placing one of the lead-out ends is formed between each two adjacent isolation ribs, and the reinforcement ribs and the isolation ribs are staggered.
[0008] In some embodiments, two opposite sides of the isolation plate are respectively provided with inwardly concave corners, and the isolation ribs and the reinforcing ribs are respectively provided at the corresponding inwardly concave corners and respectively extend to opposite sides of the isolation plate.
[0009] In some embodiments, the isolation ribs include square vertical panels disposed at corresponding inner concave corners and strip ribs extending toward the side edges of the isolation panels.
[0010] In some embodiments, the reinforcing ribs include triangular vertical plates arranged at corresponding concave corners.
[0011] In some embodiments, the isolation plate is injection molded in one step to form an integrated structural component.
[0012] In some embodiments, the isolation plate includes two injection-molded plates each having the isolation ribs and the reinforcement ribs.
[0013] In some embodiments, a plurality of mounting holes are provided at corners of the isolation plate.
[0014] In some embodiments, an injection-molded bushing is embedded in the mounting hole, and threads are machined in the injection-molded bushing.
[0015] In some embodiments, the winding is a hairpin winding.
[0016] Another aspect of the utility model provides a motor, wherein the end of the motor is equipped with a winding isolation device as described in any of the above embodiments; wherein the isolation plate is mounted on the motor housing.
[0017] Compared with the prior art, the beneficial effects of the present invention include at least:
[0018] The winding isolation device of the utility model covers the exposed copper area of the copper bar with an isolation plate to achieve isolation protection for the exposed copper area; by providing isolation ribs on one side of the isolation plate and forming an isolation area for placing a lead-out terminal between every two adjacent isolation ribs, the lead-out terminals of the UVW three-phase windings of the winding are separated by the isolation ribs, the creepage distance and creepage gap between adjacent lead-out terminals are increased, and the phase-to-phase high voltage is prevented from breaking through the adjacent windings; in addition, the isolation ribs can also play a structural reinforcement role; further, by providing reinforcing ribs on the other side of the isolation plate and staggering the reinforcing ribs and the isolation ribs, the overall structure of the isolation plate is uniformly and effectively reinforced, so that the winding isolation device can stably and continuously play an isolation and protection role.
[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present invention, and together with the specification, are used to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0021] Figures 1 to 5A schematic structural diagram of a winding isolation device in one embodiment of the utility model is shown;
[0022] in, Figure 1 and Figure 2 A schematic diagram showing the three-dimensional structure of the winding isolation device is shown. Figure 3 A schematic diagram showing the structure of the winding isolation device covering the exposed copper area of the copper bar, Figure 4 A schematic diagram showing the structure of the winding isolation device separating the lead-out ends of the windings, Figure 5 A schematic diagram showing the structure of the winding isolation device being assembled on the motor housing;
[0023] Figure 6 and Figure 7 A schematic structural diagram of a winding isolation device in another embodiment of the utility model is shown. DETAILED DESCRIPTION
[0024] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. Instead, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art.
[0025] The accompanying drawings are only schematic illustrations of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings represent the same or similar structures, and thus their repeated description will be omitted.
[0026] The term "plurality" means two or more than two, unless otherwise clearly and specifically defined. In addition, in the description of the present invention, when a device is said to be "connected" to another device, this includes not only direct connection, but also indirect connection through other elements.
[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in different embodiments may be combined with each other.
[0028] Figures 1 to 5 The structure of the winding isolation device in one embodiment of the utility model is schematically shown, wherein: Figure 1 and Figure 2 The three-dimensional structure of the winding isolation device is shown in FIG. Figure 3 The structure of the winding isolation device covering the exposed copper area of the copper busbar is shown in the figure. Figure 4 The structure of the winding isolation device separating the lead-out ends of the winding is shown in FIG. Figure 5 The structure of the winding isolation device being assembled on the motor housing is shown; Figures 1 to 5 In the illustrated embodiment, the isolation plate of the winding isolation device is injection molded in one step to form an integrated structural component. Figure 6 and Figure 7The structure of the winding isolation device in another embodiment of the utility model is shown; Figure 6 and Figure 7 In the illustrated embodiment, the isolation plate comprises two injection-molded plates each having an isolation rib and a reinforcement rib.
[0029] Combination Figures 1 to 7 As shown, the winding isolation device provided in the embodiment of the utility model is arranged at the lead-out end 100 of the winding, and the lead-out end 100 is connected to the busbar interface 230 through the copper bus 220. The winding isolation device includes:
[0030] An isolation plate 310 covering the exposed copper area of the copper bus 220;
[0031] The isolation ribs 320 and the reinforcing ribs 330 are arranged on two opposite sides of the isolation plate 310. The isolation ribs 320 and the reinforcing ribs 330 respectively include a plurality of spaced-apart ribs, wherein an isolation area for placing a lead-out terminal 100 is formed between each two adjacent isolation ribs 320, and the reinforcing ribs 330 and the isolation ribs 320 are staggered.
[0032] The winding isolation device of the utility model covers the exposed copper area of the copper bar 220 through the isolation plate 310 (the exposed copper area of the copper bar 220 can refer to Figure 3 ), the isolation protection of the exposed copper area is realized; by setting the isolation ribs 320 on one side of the isolation plate 310, and forming an isolation area for placing a lead-out terminal 100 between each two adjacent isolation ribs 320, the lead-out terminals 100 of the UVW three-phase windings of the windings are separated by the isolation ribs 320, the creepage distance and creepage clearance between adjacent lead-out terminals 100 are increased, and the phase-to-phase high voltage is prevented from breaking through the adjacent windings; in addition, the isolation ribs 320 can also play a structural reinforcement role; further, by setting the reinforcing ribs 330 on the other side of the isolation plate 310, and staggering the reinforcing ribs 330 and the isolation ribs 320, the overall structure of the isolation plate 310 is uniformly and effectively enhanced, so that the winding isolation device can stably and continuously play an isolation protection role.
[0033] In some embodiments, two opposite sides of the isolation plate 310 are respectively provided with inwardly concave corners 360 , and the isolation ribs 320 and the reinforcing ribs 330 are respectively provided at the corresponding inwardly concave corners 360 and extend to opposite sides of the isolation plate 310 .
[0034] The isolation plate 310 is provided with an inwardly recessed angle 360, which, on the one hand, adapts to the assembly shape of the motor housing 400, realizes stable assembly, avoids loosening, and avoids interference with other components; on the other hand, the inwardly recessed angle 360 can also facilitate the arrangement of the isolation rib 320 and the reinforcing rib 330. In the drawings of the present utility model, the inwardly recessed angle 360 is shown as a right angle, but it is not limited to this; according to the assembly shape of the motor housing 400, the inwardly recessed angle 360 can also be formed as a smaller acute angle, a larger obtuse angle, etc. The isolation rib 320 is arranged at the corresponding concave corner 360 and extends to the side 370 of the isolation plate 310. The side 370 is close to the position of the busbar interface 230, thereby effectively isolating the lead-out ends 100 of adjacent windings and the connected copper bus 220; the isolation rib 320 and the reinforcement rib 330 are respectively arranged at the corresponding concave corner 360 and extend to the opposite sides of the isolation plate 310, respectively, and the structural reinforcement components can be spread throughout the main area of the isolation plate 310, thereby effectively enhancing the overall structural strength of the isolation plate 310.
[0035] In some embodiments, the isolation ribs 320 include square vertical panels disposed at corresponding inwardly recessed corners 360 and strip ribs extending toward the side edges 370 of the isolation plate 310 .
[0036] In some embodiments, the reinforcing rib 330 includes a triangular upright disposed at a corresponding concave corner 360 .
[0037] The specific structural shapes of the isolation ribs 320 and the reinforcement ribs 330 can be adjusted according to different setting requirements, as long as they can isolate the lead-out terminals 100 of adjacent windings and the connected copper busbars 220 and enhance the overall structural strength of the isolation plate 310 .
[0038] In some embodiments, a plurality of mounting holes 340 are provided at the corners of the isolation plate 310. The isolation plate 310 can be assembled to the motor housing 400 through the mounting holes. In the drawings of the present utility model, it is shown that there are four mounting holes 340, which are distributed at the four corners of the isolation plate 310, but the present invention is not limited thereto. The number and distribution positions of the mounting holes 340 can also be adjusted according to the setting requirements, as long as the isolation plate 310 can be stably assembled to the motor housing 400.
[0039] In some embodiments, an injection molded bushing 350 is embedded in the mounting hole 340, and a thread is processed in the injection molded bushing 350. The injection molded bushing 350 embedded in the mounting hole 340 can be easily processed with threads, so as to facilitate the connection of the isolation plate 310 and the motor housing 400 by bolts.
[0040] Furthermore, the corners where some mounting holes 340 are located can be bent relative to the main body of the isolation plate 310 to facilitate fastening and installation with specific parts of the motor housing 400, and reinforcing ribs 330' are provided at the bends between the corners and the main body of the isolation plate 310 to strengthen the connection strength between the corners and the main body to avoid breakage.
[0041] In the above embodiments, the isolation plate 310 may be integrally injection molded; or, the isolation plate 310 may include two injection molded plates 310 ′ each having an isolation rib 320 and a reinforcement rib 330 .
[0042] In a preferred embodiment, the isolation plate 310 adopts an integrated design, which can be easily injection molded and installed on the motor housing 400; limited by assembly space, design requirements and other conditions, the isolation plate 310 can also adopt a split design, which requires two sets of injection molding molds, and the two injection molding plates 310' need to be installed on two different housing components.
[0043] Furthermore, in the above embodiments, the winding is a hairpin winding. The hairpin winding is prone to problems such as the exposed copper area requiring isolation and protection, and the damage to the adjacent winding caused by the phase-to-phase high voltage requiring avoidance. The winding isolation device of the utility model is installed in the motor with the hairpin winding, which can effectively separate the lead-out terminal 100 of the winding of the motor stator, prevent the phase-to-phase high voltage from breaking through the adjacent winding, and isolate and protect the exposed copper area.
[0044] Of course, the winding isolation device of the present invention can also be installed in motors configured with other types of windings to effectively separate the lead-out ends 100 of the windings of the motor stator, prevent the interphase high voltage from breaking through adjacent windings, and isolate and protect the exposed copper area.
[0045] The embodiment of the utility model also provides a motor, the end of which is equipped with a winding isolation device as described in any of the above embodiments. Among them, the isolation plate 310 is installed on the motor housing 400, and the exposed copper area of the copper bar 220 is covered by the isolation plate 310 to achieve isolation protection of the exposed copper area; by setting the isolation ribs 320 on one side of the isolation plate 310, and forming an isolation area for placing a lead-out terminal 100 between each two adjacent isolation ribs 320, the lead-out terminals 100 of the UVW three-phase windings of the windings are separated by the isolation ribs 320, and the creepage distance and creepage clearance between adjacent lead-out terminals 100 are increased to prevent the phase-to-phase high voltage from breaking through the adjacent windings; the isolation ribs 320 can also play a structural reinforcement role; further, by setting the reinforcing ribs 330 on the other side of the isolation plate 310, and the reinforcing ribs 330 and the isolation ribs 320 are staggered, the overall structure of the isolation plate 310 is uniformly and effectively enhanced, so that the winding isolation device can stably and continuously play an isolation protection role, ensuring the stable operation of the motor.
[0046] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.
Claims
1. A winding isolation device is arranged at the lead-out end of the winding, and the lead-out end is connected to the busbar interface through a copper bar; It is characterized in that The winding isolation device comprises: An isolation plate covering the exposed copper area of the copper busbar; Isolation ribs and reinforcing ribs are arranged on two opposite sides of the isolation plate. The isolation ribs and reinforcing ribs respectively include a plurality of spaced-apart ribs, wherein an isolation area for placing one lead-out terminal is formed between each two adjacent isolation ribs, and the reinforcing ribs are staggered with the isolation ribs.
2. The winding isolation device according to claim 1, characterized in that: The two opposite sides of the isolation plate are respectively provided with inwardly concave corners, and the isolation ribs and the reinforcing ribs are respectively provided at the corresponding inwardly concave corners and extend to the opposite sides of the isolation plate respectively.
3. The winding isolation device according to claim 2, characterized in that: The isolation ribs include square vertical plates arranged at corresponding inner concave corners and strip ribs extending toward the side edges of the isolation plates.
4. The winding isolation device according to claim 2, characterized in that: The reinforcing ribs include triangular vertical plates arranged at corresponding inwardly concave corners.
5. The winding isolation device according to claim 1, characterized in that: The isolation plate is injection molded in one step to form an integrated structural component.
6. The winding isolation device according to claim 1, characterized in that: The isolation plate comprises two injection-molded plates respectively provided with the isolation ribs and the reinforcement ribs.
7. The winding isolation device according to claim 1, characterized in that: A plurality of mounting holes are provided at the corners of the isolation plate.
8. The winding isolation device according to claim 7, characterized in that: An injection-molded bushing is embedded in the mounting hole, and a thread is processed in the injection-molded bushing.
9. The winding isolation device according to any one of claims 1 to 8, characterized in that: The winding is a hairpin winding.
10. A motor, characterized in that: The end of the motor is equipped with a winding isolation device as described in any one of claims 1 to 9; Wherein, the isolation plate is assembled on the motor housing.