Conductive Path Noise Filter with Stable LC Wire Positioning
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Solution Overview
Problem
Existing noise filter configurations for three-phase AC electrical wires in electric vehicles face instability in positional relationships due to vibration, leading to unpredictable electrostatic capacitances and inductances, which affects the reliability of surge noise suppression.
Innovation Solution
The use of covered electrical conductors with insulating layers, capacitors formed between conductors and the conductive path main bodies, and inductors connected to these conductors, which are stabilized by arc-shaped positioning recesses and holders, ensuring consistent positional relationships and easy handling during transportation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the three covered electrical wires are allowed to move freely, then the ease of operation and installation is improved, but the positional relationships become unstable due to vibration, causing electrostatic capacitances and inductances to fluctuate and reducing noise reduction reliability
Solution Approach 1:
The holder is divided into multiple positioning recesses, each dedicated to holding a specific covered electrical conductor in a predetermined position. This segmentation allows each conductor to be independently positioned and stabilized, preventing vibration-induced displacement while maintaining ease of assembly through modular positioning.
Solution Approach 2:
The positioning recesses are pre-formed in the holder with specific geometries that automatically guide and constrain the covered electrical conductors to predetermined positions during assembly. This preliminary structural preparation ensures correct positioning is achieved simply by inserting the conductors, eliminating the need for complex adjustment procedures.
2Reliability
If the covered electrical conductors are rigidly fixed to maintain stable positional relationships, then the electrostatic capacitances and inductances remain stable for reliable noise reduction, but the ease of manufacture and assembly deteriorates due to complex positioning requirements
Solution Approach 1:
The positioning recesses are designed to automatically self-align and self-position the covered electrical conductors when inserted into the holder. The geometric constraints of the recesses guide the conductors into correct positions without requiring external positioning devices or complex assembly procedures, achieving stable positioning through self-service mechanisms.
Solution Approach 2:
The holder acts as an intermediary component between the covered electrical conductors and the inductors, providing a stable structural framework that maintains predetermined positional relationships. This intermediary structure decouples the positioning function from the electrical connection function, simplifying both manufacture and assembly.
3Ease of manufacture
If the conductors and inductors are kept as separate components, then the ease of manufacture and replacement is improved, but additional connection operations are required, increasing assembly complexity and time
Solution Approach 1:
The holder merges multiple functions into a single component: it provides structural support, positions the covered electrical conductors, and electrically connects them to the inductors. By combining the positioning function and electrical connection function in one integrated structure, the assembly process is simplified to a single insertion operation, reducing assembly time while maintaining manufacturability.
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 configuration enhances the reliability of noise reduction performance by stabilizing positional relationships and electrostatic capacitances, effectively reducing surge noise through LC resonance, while simplifying the connection process between conductors and inductors.
Implementation Method 1
capacitors being formed individually between the conductors and the conductive path main bodies
Implementation Method 2
a plurality of inductors that are respectively connected to the plurality of conductors
Implementation Method 3
setting electrostatic capacitances of the capacitor and inductances of the inductors as appropriate makes it possible to effectively reduce surge noise in a specific frequency band by LC resonance
Data Source
AI summary
A conductive path includes a plurality of covered electrical conductors that are obtained by enveloping a plurality of conductive path main bodies with insulating layers; a plurality of conductors that are individually fixed to outer circumferential surfaces of the insulating layers, capacitors being formed individually between the conductors and the conductive path main bodies; a body having a holder; a plurality of arc-shaped positioning recesses that are formed in the holder and are configured to respectively keep the plurality of covered electrical conductors positioned; a plurality of inductors that are respectively connected to the plurality of conductors and are fixed to the body; and a connector that is formed on the inductors, is exposed in an arc shape on an inner circumferential surface of the positioning recesses, and comes into contact with the conductors in a state in which the covered electrical conductors are held in the positioning recesses.