Noise Filter with Straight Extension and Link Core
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Solution Overview
Problem
Existing noise filters with ring-shaped cores require cumbersome assembly, are prone to positional deviations that reduce noise-reducing effectiveness, and are difficult to install in narrow spaces due to their height and complexity in attaching multiple electric wires.
Innovation Solution
A noise filter design featuring a straight extension portion for easy conductor attachment, a link core that forms a continuous ring-shaped magnetic path, and a fitting plate to ensure proper positioning and strength, allowing for efficient assembly and installation in confined spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ring-shaped core with divisional cores is used, then noise reduction function is provided, but assembly work becomes cumbersome and efficiency decreases
Solution Approach 1:
The core is divided into a core main body and a link core that can be attached separately. The core main body has extension portions that facilitate easy attachment of conductors, while the link core completes the ring-shaped magnetic path. This segmentation allows independent assembly of components, significantly improving assembly efficiency while maintaining the noise reduction function.
2Ease of manufacture
If divisional cores are used to form a ring-shaped structure, then the noise filter can be assembled, but positional deviation occurs reducing magnetic flux and impedance characteristic
Solution Approach 1:
A link core serves as an intermediary component that connects the extension portions of the core main body. The link core includes a fitting plate that fits between the extension portions, ensuring precise positioning and eliminating gaps. This intermediary structure maintains manufacturing precision by preventing positional deviation while enabling easy assembly.
3Reliability
If a circular ring-shaped core is used, then noise reduction is achieved, but the height is large making installation in narrow spaces difficult
Solution Approach 1:
The core structure transitions from a traditional circular ring shape to a flat planar configuration. The core main body and link core are arranged in a plane, creating a low-profile ring-shaped magnetic path. This dimensional change reduces the height significantly while maintaining the effective area of the magnetic path, enabling installation in narrow spaces without compromising noise reduction performance.
4Reliability
If multiple conductors are attached to a ring-shaped core, then collective noise reduction is achieved, but the attaching work becomes even more complex
Solution Approach 1:
The extension portions of the core main body serve multiple functions: they provide attachment points for conductors, guide the positioning of conductors, and facilitate the assembly process. This multi-functional design simplifies the attachment of multiple conductors by providing a unified attachment interface, reducing the complexity of assembling multiple wires to the noise filter.
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 enhances noise reduction efficiency, simplifies assembly, and enables the noise filter to be installed in narrow spaces while maintaining a strong and effective noise-reducing performance.
Implementation Method 1
the impedance characteristic lowers due to decrease of the magnetic flus passing through the magnetic path
Implementation Method 2
a ring-shaped core that is a circular magnetic body
Data Source
Figure 1
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AI summary
A noise filter (10) is equipped with plural conductors (20) having respective winding portions (21) and a ring-shaped core which is inserted through the winding portions of the plural conductors and made of a magnetic material. The ring-shaped core has a core main body (40) having a pair of extension portions (41) and (42) that are connected to each other at one end and a link core (50) which is attached to the core main body at the other end and thereby connects the extension portions and . At least one of the extension portions and of the core main body is straight. The plural conductors are arranged in a row in a state that the straight extension portion is inserted through the winding portions of the plural conductors.