Anti-electromagnetic interference copper enameled wire
Patent Information
- Application Number
- CN202522076571.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-26
- Publication Date
- 2026-09-15
- Estimated Expiration
- 2035-09-26
AI Technical Summary
然而，随着电子设备向高频化、集成化发展，传统铜漆包线逐渐暴露出显著的电磁兼容缺陷：
[0016] 1. The inner layer of the shielding layer is a composite layer of graphene and carbonyl iron powder, which converts the incident electromagnetic wave into heat energy through dielectric loss and magnetic loss, preventing it from generating stray current in the conductor; the outer layer is a nickel-phosphorus alloy plating layer, which uses its dense metal structure to reflect the residual electromagnetic waves that are not absorbed by the inner layer, blocking the intrusion path of external electromagnetic signals, and ultimately avoiding signal distortion, reduced equipment working accuracy and malfunction.
Smart Images
Figure CN224759161U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of copper enameled wire technology, and specifically discloses a copper enameled wire that resists electromagnetic interference. Background Technology
[0002] Copper enameled wire is a type of wire with copper as the conductive substrate and an insulating enamel coating on the surface. It is widely used in motors, transformers, relays, electronic instruments, and various electronic devices as a core component for power transmission and signal conduction. It achieves efficient transmission of current or signals through the copper conductor and provides electrical isolation between the conductor and the external environment through the insulating enamel layer. It is a fundamental component in the electrical and electronic field that combines conductivity and insulation, and its performance directly affects the operational stability and service life of equipment.
[0003] Traditional copper enameled wire typically consists of a single-strand copper conductor and an outer insulating varnish, primarily functioning to conduct electricity and provide insulation. However, with the increasing frequency and integration of electronic devices, traditional copper enameled wire is gradually revealing significant electromagnetic compatibility (EMC) defects:
[0004] 1. It is susceptible to interference from external electromagnetic signals. In complex electromagnetic environments, external electromagnetic waves can generate stray currents in copper conductors through electromagnetic induction, leading to signal distortion, reduced equipment accuracy, or even malfunctions.
[0005] 2. When operating at high frequencies, it generates electromagnetic radiation. These radiation signals may interfere with surrounding sensitive electronic components, making them unable to meet the electromagnetic compatibility standards for radiation limits. This problem is particularly prominent in fields with stringent electromagnetic environment requirements, such as automotive electronics and aerospace.
[0006] Therefore, an electromagnetic interference-resistant copper enameled wire is needed to solve the above problems. Utility Model Content
[0007] This invention proposes an anti-electromagnetic interference copper enameled wire that can prevent external electromagnetic waves from generating stray currents in the conductor through electromagnetic induction, thereby avoiding signal distortion, reduced equipment operating accuracy, and malfunctions. At the same time, it can suppress the interference of its own electromagnetic radiation on surrounding sensitive electronic components, meeting the requirements of electromagnetic compatibility standards for equipment radiation limits.
[0008] This utility model is implemented as follows: an anti-electromagnetic interference copper enameled wire includes a conductor, and the outer side of the conductor is provided with a reinforcement layer, a shielding layer, an insulation layer and a protective layer from the inside to the outside, and the reinforcement layer, shielding layer, insulation layer and protective layer are arranged concentrically;
[0009] The shielding layer consists of an inner layer and an outer layer. The inner layer is a composite layer of graphene and carbonyl iron powder, and the outer layer is a nickel-phosphorus alloy plating layer. The inner layer is coated on the outside of the reinforcing layer, and the outer layer is set on the outside of the inner layer by a plating process.
[0010] As a preferred embodiment of the electromagnetic interference-resistant copper enameled wire of this utility model, the conductor is formed by metallurgical process of composite molding of oxygen-free copper and nano-silver particles.
[0011] As a preferred embodiment of the electromagnetic interference-resistant copper enameled wire of this utility model, the reinforcing layer is a carbon fiber reinforced polyimide composite film. The reinforcing layer is wrapped around the outside of the conductor in a spiral winding manner, and the overlapping joints of the reinforcing layer are bonded and fixed with high-temperature resistant polyimide adhesive.
[0012] As a preferred embodiment of the electromagnetic interference-resistant copper enameled wire of this utility model, the insulating layer is a nano-alumina modified polyimide varnish coating, and the insulating layer is coated on the outer side of the outer layer.
[0013] As a preferred embodiment of the electromagnetic interference resistant copper enameled wire of this utility model, the protective layer is an extruded weather-resistant polytetrafluoroethylene propylene sheath.
[0014] As a preferred embodiment of the electromagnetic interference-resistant copper enameled wire of this invention, the surface of the conductor is subjected to electrolytic polishing treatment.
[0015] The beneficial effects of this utility model are:
[0016] 1. The inner layer of the shielding layer is a composite layer of graphene and carbonyl iron powder, which converts the incident electromagnetic wave into heat energy through dielectric loss and magnetic loss, preventing it from generating stray current in the conductor; the outer layer is a nickel-phosphorus alloy plating layer, which uses its dense metal structure to reflect the residual electromagnetic waves that are not absorbed by the inner layer, blocking the intrusion path of external electromagnetic signals, and ultimately avoiding signal distortion, reduced equipment working accuracy and malfunction.
[0017] 2. In terms of suppressing its own radiation, the electromagnetic radiation generated when the conductor is working is initially constrained by the reinforcement layer and then captured and consumed by the graphene and carbonyl iron powder composite structure in the inner layer of the shielding layer; the outer nickel-phosphorus alloy plating layer reflects the radiation that is not completely absorbed by the inner layer back to the inner layer for further loss, thereby reducing the interference of its own electromagnetic radiation to surrounding sensitive electronic components and meeting the requirements of the electromagnetic compatibility standard for equipment radiation limits. Attached Figure Description
[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.
[0019] Figure 1 This is an overall structural diagram of an anti-electromagnetic interference copper enameled wire according to the present invention;
[0020] Figure 2 This is a front view of the present invention.
[0021] Figure 3 This is a partial structural diagram of the present invention.
[0022] The markings in the diagram are: 1. Conductor; 2. Reinforcing layer; 3. Shielding layer; 4. Inner layer; 5. Outer layer; 6. Insulating layer; 7. Protective layer. Detailed Implementation
[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.
[0024] Please see Figure 1-3 An anti-electromagnetic interference copper enameled wire includes a conductor 1. The outer side of the conductor 1 is provided with an enhancement layer 2, a shielding layer 3, an insulation layer 6 and a protective layer 7 from the inside to the outside. The enhancement layer 2, the shielding layer 3, the insulation layer 6 and the protective layer 7 are arranged concentrically.
[0025] The shielding layer 3 consists of an inner layer 4 and an outer layer 5. The inner layer 4 is a composite layer of graphene and carbonyl iron powder, and the outer layer 5 is a nickel-phosphorus alloy plating layer. The inner layer 4 is coated on the outside of the reinforcing layer 2, and the outer layer 5 is set on the outside of the inner layer 4 through a plating process.
[0026] In this embodiment: the shielding layer 3 is the core structure for realizing the anti-electromagnetic interference function. Its inner layer 4 is a composite layer of graphene and carbonyl iron powder, which is attached to the outside of the reinforcing layer 2 through a coating process. The high conductivity of graphene and the magnetic loss characteristics of carbonyl iron powder work synergistically. When external electromagnetic waves are incident, the inner layer 4 can convert the electromagnetic wave energy into heat energy through dielectric loss and magnetic loss, thereby preventing the external electromagnetic waves from generating stray current in the conductor 1 through electromagnetic induction. The outer layer 5 of the shielding layer 3 is a nickel-phosphorus alloy plating layer, which is tightly bonded to the outside of the inner layer 4 through a plating process. Its dense metal structure can reflect the residual electromagnetic waves that are not absorbed by the inner layer 4, further blocking the intrusion path of external electromagnetic signals, and ultimately avoiding the occurrence of signal distortion, equipment working accuracy reduction and malfunction.
[0027] In terms of suppressing its own electromagnetic radiation, the electromagnetic radiation generated by conductor 1 when operating at high frequency will first pass through the initial constraint of the reinforcement layer 2, and then be absorbed by the inner layer 4 of the shielding layer 3. The composite structure of graphene and carbonyl iron powder can capture radiation energy through the conjugation effect and magnetic dipole moment, reducing the intensity of radiation propagation outward. The nickel-phosphorus alloy plating of the outer layer 5 reflects the radiation signal that is not completely absorbed by the inner layer 4 back to the inner layer 4 for further loss through mirror reflection, thereby reducing the interference of its own electromagnetic radiation on surrounding sensitive electronic components and meeting the requirements of the electromagnetic compatibility standard for equipment radiation limits. Conductor 1 serves as the core of current transmission.
[0028] As a technical optimization of this utility model, conductor 1 is formed by composite molding of oxygen-free copper and nano-silver particles through a metallurgical process.
[0029] In this embodiment: the conductor 1 is made of oxygen-free copper and nano-silver particles through a metallurgical process. The oxygen-free copper serves as the matrix to ensure high conductivity, while the nano-silver particles are uniformly dispersed in the copper matrix through metallurgical bonding, which can reduce scattering loss during electron transmission. At the same time, the refined grains improve the conductivity and mechanical stability of the conductor 1, ensuring current transmission efficiency.
[0030] As a technical optimization of this utility model, the reinforcing layer 2 is a carbon fiber reinforced polyimide composite film. The reinforcing layer 2 is wrapped around the outside of the conductor 1 in a spiral winding manner, and the overlapping parts of the reinforcing layer 2 are bonded and fixed by high temperature resistant polyimide adhesive.
[0031] In this embodiment: the reinforcing layer 2 is a carbon fiber reinforced polyimide composite film, and the polyimide matrix fills the fiber gaps. When the wire is subjected to radial compression or bending stress, the carbon fiber transfers the load to the matrix through interfacial shear stress, which significantly improves the overall structure's creep resistance and disperses the stress when the wire is bent.
[0032] As a technical optimization of this utility model, the insulating layer 6 is a nano-alumina modified polyimide paint coating, and the insulating layer 6 is coated on the outer side of the outer layer 5.
[0033] In this embodiment: the insulating layer 6 is a nano-alumina modified polyimide paint coating. The nano-alumina particles are uniformly dispersed in the polyimide matrix, which can improve the breakdown strength and temperature resistance of the coating. After being coated on the outside of the outer layer 5, it can block the electrical conduction between the shielding layer 3 and the outside, prevent the risk of short circuit, and ensure the electrical safety of the conductor 1 when transmitting current through the insulation properties.
[0034] As a technical optimization of this utility model, the protective layer 7 is an extruded weather-resistant polytetrafluoroethylene propylene sheath.
[0035] In this embodiment: the protective layer 7 is an extruded weather-resistant polytetrafluoroethylene propylene sheath, which is tightly wrapped around the outside of the insulation layer 6 through an extrusion process. Utilizing the excellent chemical corrosion resistance, high and low temperature resistance and wear resistance of polytetrafluoroethylene propylene, it resists chemical erosion, temperature changes and mechanical friction in the external environment, protects the internal insulation layer 6, shielding layer 3 and other structures from damage, and extends the service life of the wire.
[0036] As a technical optimization of this utility model, the surface of conductor 1 is subjected to electrolytic polishing treatment.
[0037] In this embodiment: After electrolytic polishing, the surface oxide layer and micro protrusions of the single conductor 1 can be removed, forming a smooth and flat surface, which provides a uniform adhesion surface for the winding of the reinforcing layer 2.
[0038] The working principle and usage process of this utility model: The shielding layer 3 is the core structure for realizing the anti-electromagnetic interference function. Its inner layer 4 is a composite layer of graphene and carbonyl iron powder, which is attached to the outside of the reinforcing layer 2 through a coating process. The high conductivity of graphene and the magnetic loss characteristics of carbonyl iron powder form a synergistic effect. When external electromagnetic waves are incident, the inner layer 4 can convert the electromagnetic wave energy into heat energy through dielectric loss and magnetic loss, thereby preventing the external electromagnetic waves from generating stray current in the conductor 1 through electromagnetic induction. The outer layer 5 of the shielding layer 3 is a nickel-phosphorus alloy plating layer, which is tightly bonded to the outside of the inner layer 4 through a plating process. Its dense metal structure can reflect the residual electromagnetic waves that are not absorbed by the inner layer 4, further blocking the intrusion path of external electromagnetic signals, and ultimately avoiding signal distortion, equipment working accuracy reduction and malfunction.
[0039] In terms of suppressing its own electromagnetic radiation, the electromagnetic radiation generated by conductor 1 when operating at high frequency will first pass through the initial constraint of the reinforcement layer 2, and then be absorbed by the inner layer 4 of the shielding layer 3. The composite structure of graphene and carbonyl iron powder can capture radiation energy through the conjugation effect and magnetic dipole moment, reducing the intensity of radiation propagation outward. The nickel-phosphorus alloy coating of the outer layer 5 reflects the radiation signal that is not completely absorbed by the inner layer 4 back to the inner layer 4 for further loss through mirror reflection, thereby reducing the interference of its own electromagnetic radiation on surrounding sensitive electronic components and meeting the requirements of the electromagnetic compatibility standard for equipment radiation limits. Conductor 1 serves as the core of current transmission.
[0040] Conductor 1 is formed by metallurgical process of oxygen-free copper and nano silver particles. Its surface is treated by electrolytic polishing to ensure high conductivity and provide a flat substrate for external structure. The reinforcing layer 2 is a carbon fiber reinforced polyimide composite film. The polyimide matrix fills the gaps between the fibers. When the wire is subjected to radial compression or bending stress, the carbon fiber transfers the load to the matrix through interfacial shear stress, which significantly improves the structure's creep resistance.
[0041] The insulation layer 6 is a nano-alumina modified polyimide varnish coating, which is applied to the outer side of the outer layer 5 of the shielding layer 3. The insulation performance is improved by the strengthening effect of nanoparticles, preventing the shielding layer 3 from forming an electrical connection with the external conductor and ensuring the insulation safety of the wire. The protective layer 7 is an extruded weather-resistant polytetrafluoroethylene propylene sheath, which is tightly wrapped around the outer side of the insulation layer 6. It can resist mechanical wear, chemical corrosion and temperature changes in the external environment, protect the structural integrity of each internal functional layer, and ensure the long-term stability of the overall electromagnetic interference resistance performance.
[0042] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0043] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.
Claims
1. An anti-electromagnetic interference copper enameled wire, comprising a conductor (1), characterized in that: The conductor (1) is provided with an enhancement layer (2), a shielding layer (3), an insulation layer (6) and a protective layer (7) from the inside to the outside, and the enhancement layer (2), shielding layer (3), insulation layer (6) and protective layer (7) are arranged concentrically; The shielding layer (3) consists of an inner layer (4) and an outer layer (5). The inner layer (4) is a composite layer of graphene and carbonyl iron powder, and the outer layer (5) is a nickel-phosphorus alloy plating layer. The inner layer (4) is coated on the outside of the reinforcing layer (2), and the outer layer (5) is set on the outside of the inner layer (4) by a plating process.
2. The anti-electromagnetic interference copper enameled wire according to claim 1, characterized in that: The conductor (1) is formed by metallurgical process of oxygen-free copper and nano-silver particles.
3. The anti-electromagnetic interference copper enameled wire according to claim 1, characterized in that: The reinforcing layer (2) is a carbon fiber reinforced polyimide composite film. The reinforcing layer (2) is wrapped around the outside of the conductor (1) in a spiral winding manner. The overlapping parts of the reinforcing layer (2) are bonded and fixed by high temperature resistant polyimide adhesive.
4. The anti-electromagnetic interference copper enameled wire according to claim 1, characterized in that: The insulating layer (6) is a nano-alumina modified polyimide paint coating, and the insulating layer (6) is coated on the outside of the outer layer (5).
5. The anti-electromagnetic interference copper enameled wire according to claim 1, characterized in that: The protective layer (7) is an extruded weather-resistant polytetrafluoroethylene propylene sheath.
6. The anti-electromagnetic interference copper enameled wire according to claim 1, characterized in that: The surface of the conductor (1) is electropolished.