Conductive Path Noise Filter Using LC Resonance
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Solution Overview
Problem
Existing methods, such as using braided wires to shield wire harnesses in electric vehicles, are inefficient in reducing surge noise in specific frequency bands produced by inverter devices.
Innovation Solution
A conductive path with a noise filter is designed, comprising a conductive path main body, a coil-shaped inductor, and a capacitor, where the electrostatic capacitance and inductance are adjusted to achieve LC resonance, effectively reducing surge noise in specific frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional shielding methods are used, then general noise is reduced, but the device complexity and size increase without efficiently targeting specific frequency bands
Solution Approach 1:
The patent uses parameter tuning of the LC circuit components to create a frequency-selective filter. By adjusting the inductance and capacitance values, the filter is tuned to resonate at specific surge noise frequencies, creating a targeted solution that is simpler and more effective than broad-spectrum shielding methods.
Solution Approach 2:
The patent segments the noise filtering function into a specific frequency-targeted LC circuit rather than using a comprehensive shielding structure. This segmentation allows the system to address only the problematic surge noise frequencies while leaving other frequency ranges unaffected, reducing overall device complexity.
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 efficiently attenuates surge noise by utilizing LC resonance, reducing noise in specific frequency bands and minimizing component count and size, while preventing inductor contact and eliminating the need for lead wires.
Implementation Method 1
Setting the electrostatic capacitance of a capacitor, and setting the inductance of an inductor by varying the winding number, the length or the like of a coil make it possible to efficiently reduce a surge noise in a specific frequency band due to an LC resonance.
Data Source
AI summary
A conductive path with noise filter that enables an efficient reduction in a surge noise in a specific frequency band is provided. A conductive path with noise filter includes a conductive path main body, V-phase wire, W-phase wire, a coil-shaped inductor, V-phase inductor, W-phase inductor surrounding the conductive path main body, V-phase wire, W-phase wire, and a capacitor, V-phase capacitor, W-phase capacitor arranged between the conductive path main body, V-phase wire, W-phase wire and the inductor, V-phase inductor, W-phase inductor.