Noise Filter Wiring Lead Intersection for Magnetic Coupling Suppression
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Solution Overview
Problem
Conventional noise filters require special X condensers and restrict circuit component arrangement, leading to increased circuit area and inefficient magnetic coupling suppression.
Innovation Solution
A noise filter design using film condensers and coils connected by wiring leads that intersect odd-number times, allowing typical condensers to be used and suppressing magnetic coupling between them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional noise filter configuration is used with special X condensers, then magnetic coupling suppression is achieved, but device complexity increases and typical condensers cannot be utilized
Solution Approach 1:
The patent converts the harmful magnetic coupling effect into a beneficial cancellation mechanism by arranging wiring leads to intersect odd-number times, causing magnetic fluxes to oppose and cancel each other, thus suppressing normal-mode noise without requiring special condenser structures
Solution Approach 2:
The patent changes the spatial arrangement parameter of wiring leads (intersecting odd-number times) rather than changing the condenser structure itself, allowing typical condensers to be used while achieving magnetic coupling suppression through altered wiring configuration
2Object-affected harmful factors
If condensers are arranged to suppress magnetic coupling by non-parallel current vectors, then magnetic coupling is reduced, but circuit area increases
Solution Approach 1:
The patent moves the magnetic coupling suppression mechanism from spatial arrangement of condensers (2D plane) to spatial arrangement of wiring leads in 3D space, allowing condensers to be placed closer together while achieving suppression through lead intersection geometry
3Object-affected harmful factors
If wiring leads are arranged to intersect odd-number times, then magnetic flux cancellation is achieved, but wiring complexity increases
Solution Approach 1:
The patent employs asymmetric wiring lead arrangement where leads intersect an odd number of times (1, 3, 5...) rather than symmetric non-intersecting or even-intersection patterns, creating the necessary magnetic flux opposition while maintaining practical wiring feasibility
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
This design improves normal-mode attenuation characteristics by canceling magnetic fluxes between condensers, enabling effective noise filtration without the need for special components and reducing circuit area.
Implementation Method 1
the first film condenser and the second film condenser are arranged at a distance in which they are magnetically coupled with each other
Implementation Method 2
magnetic fluxes generated by the electric currents flowing the respective paths are cancelled each other
Data Source
AI summary
A noise filter is provided with a filter circuit including a first condenser and a second condenser; the first condenser and the second condenser are connected in parallel with each other by a first wiring lead for connecting one terminal of the first condenser with one terminal of the second condenser and a second wiring lead for connecting the other terminal of the first condenser with the other terminal of the second condenser; the first wiring lead and the second wiring lead are arranged in such a way as to intersect each other odd-number times.