Conductive Path Noise Filter with LC Resonance
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Solution Overview
Problem
Existing methods for reducing surge noise in electric vehicles, particularly those involving braided wires, are ineffective in specific frequency bands, necessitating a more efficient noise filtering solution.
Innovation Solution
A conductive path with a noise filter configuration that includes a tubular magnetic core inductor and capacitors arranged between conductive path main bodies and terminal fittings, allowing for LC resonance to effectively reduce surge noise without complex connecting operations, and featuring a shielding layer to prevent noise from affecting surrounding devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an LC filter is implemented with separate inductor and capacitor components, then surge noise reduction is improved, but device complexity increases
Solution Approach 1:
The inductor and capacitor components of the LC filter are merged into a single integrated filter unit that is directly incorporated into the connector structure. This merging eliminates the need for separate discrete components and complex wiring, reducing overall device complexity while maintaining effective surge noise reduction through LC resonance in specific frequency bands.
Solution Approach 2:
The connector is designed to serve multiple functions: electrical connection, mechanical positioning, and noise filtering. By integrating the LC filter directly into the connector housing, the same component structure achieves both connection and filtering functions, thereby reducing device complexity while improving surge noise reduction performance.
2Ease of manufacture
If terminal fittings are allowed to be inserted without guidance, then ease of assembly is improved, but positioning precision deteriorates
Solution Approach 1:
A guide structure acts as an intermediary element between the terminal fitting and the connector housing during assembly. This guide structure facilitates easy insertion by providing directional guidance, ensuring that the terminal fitting is correctly positioned before making electrical contact, thereby maintaining both assembly ease and positioning precision.
Solution Approach 2:
The guide structure performs the preliminary action of aligning and positioning the terminal fitting before the actual connection is made. By pre-positioning the terminal fitting in the correct orientation and location, the guide structure ensures that subsequent assembly steps proceed smoothly while maintaining high positioning precision, all while keeping the assembly process simple and easy to perform.
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 reduces surge noise in specific frequency bands through LC resonance, simplifies connection processes, and reduces the size and complexity of noise filtering components, while ensuring reliable orientation and positioning of terminal fittings.
Implementation Method 1
setting the electrostatic capacitance of the capacitor, setting the inductance of the inductor, and fitting the insertion-side terminal fitting to the receiving terminal fitting make it possible to effectively reduce surge noise in a specific frequency band due to LC resonance
Implementation Method 2
an inductor provided in the holder... the inductor is a tubular magnetic core
Data Source
AI summary
A conductive path with noise filter that enables an effective reduction in a surge noise in a specific frequency band is provided. A conductive path with noise filter includes conductive path main, an insulating holder, inductors provided in the holder, receiving terminal fittings provided in the holder, insertion-side terminal fittings capable of being fitted to the receiving terminal fittings, a U-phase capacitor provided between the U-phase wire and the U-phase insertion-side terminal fitting, a V-phase capacitor provided between the V-phase wire and the V-phase insertion-side terminal fitting, and a W-phase capacitor provided between the W-phase wire and the W-phase insertion-side terminal fitting.