High-voltage high-power-density block tooth type winding insulator
By using film tape and heat shrink tube to enhance insulation in blocked toothed winding stator, the problem of windings being easily burned out under high power density and long-term operation is solved, and better insulation effect and service life are achieved.
Patent Information
- Application Number
- CN202421499605.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The existing blocked toothed stator is prone to burn out under high power density and long-term operation, mainly due to insufficient insulation treatment in the groove and end of the blocked toothed winding.
The high voltage and high power density blocked toothed winding insulation scheme is adopted. By wrapping film tape on the inside of the tooth frame and wrapping the heat shrink tube on the outside of the electromagnetic wire, the interphase insulation and end insulation of the winding are enhanced.
It effectively improves the interphase insulation and end insulation of the blocked toothed winding, prevents the insulation from being broken down and extends the service life of the winding.
Smart Images
Figure CN222897107U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a high-voltage and high-power-density block tooth winding insulation. Background Art
[0002] The insulation treatment of the segmented tooth type winding stator only uses an insulating frame to separate the electromagnetic wire from the stator core, while ignoring the insulation treatment inside and at the ends of the segmented tooth winding.
[0003] The existing block-tooth type winding stator is prone to burning out the winding under working conditions requiring high power density, long continuous operation time, and various operating condition cycles. Utility Model Content
[0004] The purpose of the utility model is to solve the problem that the insulation treatment of the existing segmented tooth type winding stator only uses an insulating frame to separate the electromagnetic wire from the stator core, but ignores the insulation treatment in the segmented tooth winding slot and at the end, and the winding is easily burned out under the working conditions requiring high power density, long continuous operation time, and various operating conditions. A high-voltage and high-power density segmented tooth winding insulation is proposed.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A high-voltage and high-power density segmented tooth winding insulation comprises a tooth frame, characterized in that: a film tape is wound around the inner side of the tooth frame, and a first electromagnetic wire is wrapped around the inner side of the film tape, a first insulating sleeve is installed at one end of the first electromagnetic wire, and a second electromagnetic wire is hinged at one end of the first electromagnetic wire, a second insulating sleeve is installed at one end of the second electromagnetic wire, and a heat shrink tube is wrapped around the outer side of the first electromagnetic wire.
[0007] Preferably, the film tape is wound around the surface of the first electromagnetic wire, and the film tape is adhered to the inner side of the tooth frame.
[0008] Preferably, the first electromagnetic wire is hingedly connected to the second electromagnetic wire.
[0009] Preferably, the length of the film tape wrapped around the first insulating sleeve is 10CM.
[0010] Preferably, the length of the heat shrink tube wrapped around the first insulating sleeve is 15CM.
[0011] Preferably, the film tape is made of polyimide.
[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:
[0013] 1. In the utility model, since the winding in the slot has enameled wires of different phases, the block tooth structure makes the electrical clearance of the winding slot small, while the electrical clearance at the slot bottom is large, and the phase-to-phase insulation relies only on the insulation of the enameled wire itself. The selection, pasting method and fixing method of the polyimide film tape are determined according to the length of the block tooth skeleton and the winding parameters. The polyimide film tape is wrapped at the small electrical clearance of the slot, thereby improving the phase-to-phase insulation of the winding in the slot.
[0014] 2. In the utility model, at the spot welding of the inter-pole connection at the end of the winding, each single electromagnetic wire with multiple turns is covered with an insulating sleeve and an insulating wrap, and each welding point is staggered at a certain distance to prevent heat concentration and improve the phase-to-phase insulation at the end of the winding. 3. The winding lead wire is circumferentially positioned and axially fixed at the end to prevent the lead wire from approaching or contacting the motor end cover, ensure that the lead wire creepage distance meets the requirements, and prevent the winding insulation from being broken down. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the single-tooth winding structure in the utility model;
[0016] Figure 2 This is a schematic diagram of the insulation structure of the inter-pole connection of the winding in the utility model;
[0017] Figure 3 It is a schematic diagram of the insulation structure of the winding inter-pole connection in the utility model.
[0018] Legend:
[0019] 1. Gear frame; 2. Heat shrink tube; 3. Film tape; 4. First insulating sleeve; 5. Second insulating sleeve; 6. First electromagnetic wire; 7. Second electromagnetic wire. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] Reference Figure 1-3A high-voltage and high-power density block tooth winding insulation comprises a tooth frame 1, a heat shrink tube 2, a film tape 3, a first insulating sleeve 4, a second insulating sleeve 5, a first electromagnetic wire 6, a second electromagnetic wire 7 and a heat shrink tube 8. The inner side of the tooth frame 1 is wrapped with the film tape 3, and the inner side of the film tape 3 is wrapped with the first electromagnetic wire 6. One end of the first electromagnetic wire 6 is installed with the first insulating sleeve 4, and one end of the first electromagnetic wire 6 is hinged to the second electromagnetic wire 7. One end of the second electromagnetic wire 7 is installed with the second insulating sleeve 5, and the outer side of the first electromagnetic wire 6 is wrapped with the heat shrink tube 2.
[0022] Furthermore, the film tape 3 is wrapped around the surface of the first electromagnetic wire 6, and the film tape 3 is pasted on the inner side of the tooth frame 1. The size of the polyimide film tape 3 is determined and pasted on the inner side of the block tooth frame 1. After the winding is completed, it is turned up to the outermost layer of the electromagnetic wire, and then wrapped with two layers of polyimide film tape 3 again and fixed.
[0023] Furthermore, the first electromagnetic wire 6 and the second electromagnetic wire 7 are hingedly connected, and each single electromagnetic wire wound with multiple turns is covered with an insulating sleeve, and then the electromagnetic wires are hinged after the insulation skin is removed, and the hinge length and the hinge position are spot welded.
[0024] Furthermore, the length of the film tape 3 wrapped around the first insulating sleeve 4 is 10 cm.
[0025] Furthermore, the length of the heat shrink tube 2 wrapped around the first insulating sleeve 4 is 15 cm.
[0026] Furthermore, the film tape 3 is made of polyimide.
[0027] Working principle: When in use, before winding the block tooth skeleton, determine the size of the polyimide film tape 3 in advance and stick it to the inside of the block tooth skeleton 1. After the winding is completed, turn it up to the outermost layer of the electromagnetic wire, and wrap it with two layers of polyimide film tape 3 again and fix it. At the pole-to-pole connection of the winding, an insulating sleeve is put on each single electromagnetic wire that is wound with multiple turns. Then, the electromagnetic wire is hinged after the insulation skin is removed, and the hinge length and spot welded hinge are unified. A heat shrink tube 8 is put on the pole-to-pole connection at each end. Tooling is used to make the winding lead wire circumferentially positioned and axially fixed at the end of the winding to prevent the lead wire from approaching or contacting the motor end cover, ensure that the lead wire creepage distance meets the requirements, and prevent the winding insulation from being broken down.
[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A high voltage and high power density block tooth winding insulation, comprising a tooth frame (1), characterized in that: The inner side of the tooth frame (1) is wound with a film tape (3), and the inner side of the film tape (3) is wrapped with a first electromagnetic wire (6), one end of the first electromagnetic wire (6) is installed with a first insulating sleeve (4), and one end of the first electromagnetic wire (6) is hinged to the second electromagnetic wire (7), one end of the second electromagnetic wire (7) is installed with a second insulating sleeve (5), and the outer side of the first electromagnetic wire (6) is wrapped with a heat shrink tube (2).
2. The high voltage and high power density block tooth winding insulation according to claim 1, characterized in that: The film tape (3) is wound around the surface of the first electromagnetic wire (6), and the film tape (3) is adhered to the inner side of the tooth frame (1).
3. The high voltage and high power density block tooth winding insulation according to claim 1, characterized in that: The first electromagnetic wire (6) and the second electromagnetic wire (7) are hingedly connected.
4. The high voltage and high power density block tooth winding insulation according to claim 1, characterized in that: The length of the film tape (3) wrapped around the first insulating sleeve (4) is 10 cm.
5. The high voltage and high power density block tooth winding insulation according to claim 1, characterized in that: The length of the heat shrink tube (2) wrapped around the first insulating sleeve (4) is 15 cm.
6. The high voltage and high power density block tooth winding insulation according to claim 1, characterized in that: The film tape (3) is made of polyimide.