Cable Shield Connection Layout for Lower Electromagnetic Radiation
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Solution Overview
Problem
The existing shielding connection structures between cables fail to form a stable and effective connection, leading to inadequate electromagnetic shielding, which affects the electromagnetic interference between cable cores and surrounding electrical components.
Innovation Solution
A cable assembly design where the shielding layers of two cables are connected in a symmetrical or 360° arrangement, with optional fixation by welding, and a conductive device is used to enhance the connection, ensuring continuity and reducing electromagnetic radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single spot connection is used between shielding layers, then the connection structure is simple, but a large current flows through the connection position generating a magnetic field that couples with the cable core magnetic field, causing large radiation
Solution Approach 1:
The patent divides the single connection point into multiple symmetrical connection points around the cable circumference. This segmentation distributes the current flow across multiple paths, reducing the current density at each connection point and thereby reducing the magnetic field generation and electromagnetic radiation at each individual connection position.
Solution Approach 2:
The patent applies different connection configurations at different locations around the cable. By creating symmetrical connection points at specific angular positions, the magnetic fields generated at each connection point are oriented in opposite directions, allowing them to offset each other and reduce overall radiation.
2Object-generated harmful factors
If symmetrical connection arrangement is used between shielding layers, then magnetic fields at connection positions offset each other to reduce radiation, but the connection structure becomes more complex
Solution Approach 1:
The patent employs symmetrical arrangement of connection points, which is a form of controlled symmetry rather than asymmetry. The connection points are positioned at specific angular intervals (e.g., 180 degrees apart) to create a balanced configuration that generates opposing magnetic fields. This controlled symmetry achieves radiation reduction while maintaining manufacturing feasibility.
3Object-generated harmful factors
If 360° connection arrangement is used between shielding layers, then radiation is greatly shielded and offset, but the manufacturing complexity and material usage increase
Solution Approach 1:
The patent implements a partial 360° connection approach, using discrete connection points distributed around the cable circumference rather than continuous 360° connection. This partial action achieves sufficient magnetic field offset and radiation reduction while avoiding the excessive material usage and manufacturing complexity of a complete continuous connection.
4Reliability
If shielding layers are connected to ensure continuity, then electromagnetic shielding effect is improved, but the connection stability and insulation requirements become more stringent
Solution Approach 1:
The patent incorporates insulation structures and connection designs in advance during the cable manufacturing process. By pre-positioning insulation layers and designing the connection geometry beforehand, the patent ensures both electrical continuity for shielding and adequate insulation between conductive elements, reducing the stringency of post-assembly requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves improved electromagnetic shielding by offsetting magnetic fields, reducing radiation, and ensuring stable connections with enhanced insulation and structural strength.
Implementation Method 1
When the connection positions between the first shielding layer and the second shielding layer are symmetrical, the magnetic fields generated at the connection positions are in opposite directions and will offset each other to reduce the resultant magnetic field
Implementation Method 2
the first shielding layer and the second shielding layer may also be fixedly connected by welding
Data Source
AI summary
A cable assembly and a manufacturing method for a cable assembly. The cable assembly includes a first cable and a second cable. The first cable includes a first cable core and a first shielding layer. A periphery of the first cable core is wrapped by a first protective layer, and the first shielding layer is disposed on an outer side of the first protective layer. The second cable includes a second cable core and a second shielding layer. A periphery of the second cable core is wrapped by a second protective layer, and the second shielding layer is disposed on an outer side of the second protective layer. The first shielding layer is electrically connected to the second shielding layer.