Common Mode Choke Coil Laminate Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional common mode choke coils experience magnetic flux leakage and impedance drop due to external magnetic noise, leading to noise components in signal transmission circuits.
Innovation Solution
A common mode choke coil with a laminate structure featuring insulating layers and magnetically coupled spiral coil patterns, where the coil elements are arranged to form a closed magnetic path, preventing external noise interference and maintaining impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If two spiral coil elements are disposed adjacent to each other separated by an insulating layer, then the device complexity is reduced and manufacturing is simplified, but magnetic flux leakage occurs outside the choke coil causing impedance drop
Solution Approach 1:
The coil structure is segmented into multiple layers with insulating layers interspersed between them. This segmentation confines the magnetic flux within each layer and prevents it from leaking outside the choke coil, thereby maintaining impedance stability while keeping the manufacturing process simple through layered construction
Solution Approach 2:
The patent employs a nested layered structure where insulating layers are embedded within the coil assembly, creating a compact configuration. This nesting approach contains the magnetic field within the structured layers, preventing external leakage while maintaining a manufacturable design
2Ease of manufacture
If conventional common mode choke coil structure is used, then the device is simple to manufacture, but external magnetic noise generates electric current causing noise components in signal transmission
Solution Approach 1:
Insulating layers are introduced as intermediary elements between adjacent coil layers. These intermediaries block the path of external magnetic noise, preventing it from inducing unwanted electric currents in the coil elements, while not significantly complicating the manufacturing process
Solution Approach 2:
The patent converts the potentially harmful effect of external magnetic noise into a beneficial configuration by using the insulating layers to redirect and contain magnetic flux. The structure that initially seemed to simplify manufacturing actually provides noise immunity by creating a controlled magnetic environment
3Ease of manufacture
If coil elements are arranged without sufficient insulation, then manufacturing is easier, but magnetic flux leakage lowers the impedance produced by the magnetic field
Solution Approach 1:
Insulating layers are strategically placed at specific locations between coil elements where magnetic flux leakage would otherwise occur. This localized application of insulation maintains ease of manufacture by not requiring complete insulation throughout the entire structure, while effectively preserving the magnetic field and impedance
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 solution effectively prevents impedance drop and noise generation, enhancing signal integrity by canceling out magnetic flux and currents, thus improving signal transmission quality and simplifying manufacturing.
Implementation Method 1
The third coil pattern is capable of being magnetically coupled to the first coil pattern
Implementation Method 2
part of the magnetic paths formed by the first and second coil elements exists outside the common mode choke coil. As a result, magnetic flux leakage occurs outside the common mode choke coil
Implementation Method 3
external magnetic noise introduced into the first and second coil elements causes an electric current to flow
Data Source
AI summary
A common mode choke coil has a first coil element and a second coil element. The first coil element is configured of a first coil pattern and a second coil pattern. Each of the first and second coil patterns has two ends and is spiral-shaped therebetween. The spirals of the two patterns are wound in the same direction. The second coil element has a shape identical to the first coil element and includes a third coil pattern corresponding to the first coil pattern and a fourth coil pattern corresponding to the second coil pattern.