Synchronous motor pole coil insulation structure

Abstract

The utility model relates to the technical field of synchronous motor pole coil insulation, and discloses a synchronous motor pole coil insulation structure which comprises a coil copper wire, the outer side of the coil copper wire is provided with a turn-to-turn insulation layer, the coil copper wire is wound on a rotor iron core to form wire turns, a plurality of wire turns form a coil, and the coil copper wire is wound on the rotor iron core. A ground insulation layer is arranged on the outer side of the coil, an outer wrapping insulation layer is arranged on the outer side of the ground insulation layer, the ground insulation layer is not wrapped by the outer wrapping insulation layer, the outer wrapping insulation layer is only wound on the side, facing the outside, of the ground insulation layer, and the turn-to-turn insulation layer is tightly attached between wire turns of the coil. The ground insulation layer is tightly wrapped outside the coil and forms electrical isolation with the coil, and the outer wrapping insulation layer is tightly attached to the outside of the ground insulation layer and provides additional mechanical protection and electrical reinforcement for the ground insulation layer, and the whole coil is firm and flat.

Description

TECHNICAL FIELD

[0001] The utility model relates to synchronous machine magnetic pole coil insulation technical field, concretely is a kind of synchronous machine magnetic pole coil insulation structure. BACKGROUND

[0002] With the more and more use of synchronous machine in harsh working environment, due to motor water, damp, by acid, alkali and other corrosive gases, more and more motor magnetic pole coil insulation resistance is low even breakdown situation, therefore, improve motor internal insulation performance is the inevitable choice to ensure long-term safe operation of motor, reduce loss, the existing synchronous machine magnetic pole coil insulation structure more uses the design of the end insulation of on-line turn, part synchronous machine magnetic pole coil insulation structure also includes the insulating coating of dip-coating on coil, realize interturn insulation, coil is fixed and appears loose, coil and iron core or the rest structure in motor rub easily, and then lead to the coating as interturn insulation drop, and separate insulating coating, moisture resistance is poor. SUMMARY

[0003] The utility model discloses a kind of synchronous machine magnetic pole coil insulation structure, to solve the problem raised in the above background technology.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of synchronous machine magnetic pole coil insulation structure, including coil copper wire, the outside of the coil copper wire is provided with interturn insulation layer, the coil copper wire is wound into wire turn on rotor iron core, multiple wire turns form coil, the outside of the coil is provided with ground insulation layer, the outside of the ground insulation layer is provided with outer package insulation layer, the outer package insulation layer does not wrap ground insulation layer, the outer package insulation layer is only wound in the side of ground insulation layer towards outside.

[0005] Further, the interturn insulation layer is made of polyimide film, polyester film or polytetrafluoroethylene film, the ground insulation layer is made of multiple layers of polyester film or polytetrafluoroethylene film, and each layer is bonded by insulating glue, and the outer package insulation layer is made of composite material reinforced by high-strength fiber material.

[0006] Further, the coil copper wire is wound into coil, and the first end and the last end of the coil are exposed, and a wire segment insulation layer is arranged on the first end and the last end of the coil wound by the coil copper wire.

[0007] Further, the ground insulation layer introduces nano-scale insulation particles.

[0008] Further, an insulation buffer layer is arranged between the interturn insulation layer and the ground insulation layer, and the insulation buffer layer is made of thermoplastic elastomer material.

[0009] Further, the outer surface of the outer insulation layer is provided with a wear-resistant layer made of polytetrafluoroethylene, polyimide or ceramic coating material.

[0010] Compared with the prior art, the utility model has the beneficial effects that:

[0011] 1. By the electrical insulation of the inter-turn insulation layer, the ground insulation layer and the outer insulation layer, the insulation performance and stability of the motor can be improved significantly, the failure rate of the motor can be reduced, the heat resistance and vibration resistance of the motor can be improved, and the service life of the motor can be prolonged.

[0012] 2. The inter-turn insulation layer is tightly attached between the turns of the coil, ensuring the electrical isolation between the turns, the ground insulation layer is tightly wrapped outside the coil, forming electrical isolation with the coil, and the outer insulation layer is tightly attached outside the ground insulation layer, providing additional mechanical protection and electrical reinforcement for the ground insulation layer, and making the entire coil solid and flat. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic view of the utility model;

[0014] Figure 2 It is a structural schematic view of the utility model when the coil is flattened;

[0015] Figure 3 It is a layered schematic view of the inter-turn insulation layer, the ground insulation layer, the outer insulation layer and the coil copper wire of the utility model;

[0016] Figure 4 It is the utility model Figure 3 It is an enlarged schematic view of A in the utility model.

[0017] In the figure: 1, coil copper wire; 2, wire segment insulation layer; 3, inter-turn insulation layer; 4, ground insulation layer; 5, outer insulation layer; 6, insulation buffer layer; 7, wear-resistant layer. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0019] Please refer to Figures 1-4The utility model provides a technical scheme: a synchronous motor magnetic pole coil insulation structure, including coil copper wire 1, the outside of coil copper wire 1 is provided with interturn insulation layer 3, coil copper wire 1 is wound into turns on rotor iron core, multiple turns are formed into coil, the outside of coil is provided with ground insulation layer 4, the outside of ground insulation layer 4 is provided with outer package insulation layer 5, outer package insulation layer 5 does not wrap ground insulation layer 4, outer package insulation layer 5 only winds in the one side of ground insulation layer 4 towards outside, interturn insulation layer 3 is tightly attached between each turn of coil, ensures the electrical isolation between turns, ground insulation layer 4 is tightly wrapped outside coil, forms electrical isolation with coil, outer package insulation layer 5 is tightly attached outside ground insulation layer 4, provides additional mechanical protection and electrical reinforcement for ground insulation layer 4, and makes the whole coil solid and smooth, through the electrical insulation of interturn insulation layer 3, ground insulation layer 4, outer package insulation layer 5, can significantly improve the insulation performance and stability of motor, reduce motor failure rate, improve the heat resistance and anti-vibration ability of motor, prolong the service life of motor;

[0020] Interturn insulation layer 3 is made of polyimide film, polyester film or polytetrafluoroethylene film, these materials have excellent electrical properties, heat resistance and mechanical strength, ground insulation layer 4 is made of multiple layers of polyester film or polytetrafluoroethylene film, and each layer is bonded by insulating glue, ground insulation layer 4 is made in a multi-layer stacking manner, to ensure the integrity and stability of the insulation layer, outer package insulation layer 5 is made of high-strength fiber material reinforced composite material, to improve the mechanical strength and anti-vibration ability of the coil;

[0021] The coil copper wire 1 is wound into a coil with the first end and the last end exposed, and a wire segment insulation layer 2 is arranged on the first end and the last end of the coil copper wire 1 wound into a coil, the first end and the last end of the coil are used for connecting a circuit, and the wire segment insulation layer 2 is insulated by being additionally arranged, so that the wire segment insulation layer 2 can be installed after the coil is installed on the rotor iron core, without worrying about the wire segment insulation layer 2 falling off when the coil copper wire 1 is wound into a coil;

[0022] Nanometer-sized insulation particles are introduced into the ground insulation layer 4 to improve the insulation strength and heat resistance of the ground insulation layer 4.

[0023] An insulation buffer layer 6 is arranged between the interturn insulation layer 3 and the ground insulation layer 4, and the insulation buffer layer 6 is made of thermoplastic elastomer material to further increase the stability and durability of the ground insulation layer 4.

[0024] A wear-resistant layer 7 is arranged on the outer surface of the outer package insulation layer 5, and the wear-resistant layer 7 is made of polytetrafluoroethylene, polyimide or ceramic coating material to protect the outer package insulation layer 5 from external mechanical damage.

[0025] Working principle: in use, first, the inter-turn insulation layer 3 is formed by coating the coil copper wire 1 with polyimide film, polyester film or polytetrafluoroethylene film, then the coil copper wire 1 is wound into a coil on the rotor core, after winding, the outer side of the coil is wound and bonded with multiple layers of polyester film or polytetrafluoroethylene film to form the ground insulation layer 4, then the high-strength fiber material reinforced composite material is wound outside the ground insulation layer 4.

[0026] Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the range of the utility model protection.

Claims

1. A synchronous machine pole coil insulation structure comprising a coil copper wire (1), characterized in that: The outer side of the coil copper wire (1) is provided with an inter-turn insulation layer (3), the coil copper wire (1) is wound into turns on the rotor core, a plurality of turns form a coil, the outer side of the coil is provided with a ground insulation layer (4), the outer side of the ground insulation layer (4) is provided with an outer insulation layer (5), the outer insulation layer (5) does not wrap the ground insulation layer (4), and the outer insulation layer (5) is only wound on one side of the ground insulation layer (4) facing the outside.

2. A synchronous machine pole coil insulation structure as claimed in claim 1, characterized in that: The inter-turn insulation layer (3) is made of polyimide film, polyester film or polytetrafluoroethylene film, the ground insulation layer (4) is made by stacking a plurality of layers of polyester film or polytetrafluoroethylene film, and the layers are bonded by insulating glue, and the outer insulation layer (5) is made of a composite material reinforced by high-strength fiber material.

3. A synchronous machine pole coil insulation structure as claimed in claim 1, characterized in that: The coil copper wire (1) is wound into a coil with the first end and the last end exposed, and the coil copper wire (1) is provided with a wire segment insulation layer (2) on the first end and the last end of the coil.

4. A synchronous machine pole coil insulation structure as defined in claim 1, wherein: Nano-sized insulation particles are introduced into the ground insulation layer (4).

5. A synchronous machine pole coil insulation structure as recited in claim 1 wherein: An insulation buffer layer (6) is arranged between the inter-turn insulation layer (3) and the ground insulation layer (4), and the insulation buffer layer (6) is made of thermoplastic elastomer material.

6. An insulation structure for a pole coil of an electric synchronous machine according to claim 1, characterized in that: The outer surface of the outer insulation layer (5) is provided with a wear-resistant layer (7), and the wear-resistant layer (7) is made of polytetrafluoroethylene, polyimide or ceramic coating material.

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