Choke Coil Multi-Axis Routing to Attenuate Magnetic Field Coupling
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Solution Overview
Problem
Existing choke coils fail to sufficiently attenuate magnetic field coupling with metal parts, leading to inadequate noise reduction effects due to insufficient distance between bent winding wires and metal components.
Innovation Solution
A choke coil design featuring a magnetic body with a closed circuit and winding wires wound around pier columns, with connector connection lines strategically routed to increase distance and reduce mutual inductance, thereby attenuating magnetic field coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the winding wire is bent once to connect to the connector, then the attachment is simplified, but the magnetic field coupling with metal parts cannot be attenuated sufficiently
Solution Approach 1:
The connector connection line is configured to extend in multiple directions (x-axis, y-axis, z-axis) rather than a single bend, creating a three-dimensional path that increases distance from metal parts while maintaining compact overall structure. This multi-dimensional routing allows the connection line to avoid direct alignment with connector conductors and reduce magnetic field coupling.
Solution Approach 2:
The connector connection line is divided into multiple segments (first, second, third, and fourth connection lines) with different orientations. Each segment serves a specific function in routing the connection away from metal parts, and the segmented structure allows for optimized positioning at each stage rather than a single bent configuration.
2Device complexity
If the winding wire is bent once, then the structure is simplified, but the distance between the bent winding wire and metal part is not long enough
Solution Approach 1:
The connector connection line utilizes three-dimensional space by extending along multiple axes (x-axis for horizontal routing, y-axis for vertical routing, z-axis for depth routing). This multi-dimensional approach increases the effective distance from metal parts without requiring excessive length in a single direction, maintaining structural compactness while achieving sufficient separation.
Solution Approach 2:
The connection line is segmented into multiple sections (first connection line along y-axis, second along x-axis, third along z-axis, fourth along x-axis) where each segment contributes to the total distance from metal parts. This segmentation allows the structure to achieve sufficient length through coordinated multi-directional routing rather than a single long extension.
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 choke coil effectively improves noise reduction by minimizing magnetic field coupling with metal parts, enhancing the noise reduction effect.
Implementation Method 1
noise due to electromagnetic interference (EMI) is caused by high-speed switching operation of an inverter in a power conversion device
Implementation Method 2
magnetic field coupling between the choke coil and the metal part
Data Source
AI summary
Provided is a choke coil capable of improving a noise reduction effect by sufficiently attenuating magnetic field coupling between the choke coil and a metal part. A connector connection line includes: a first connection line led out from a connector conductor side of a coil main body of a winding wire along a y-axis direction away from the coil main body; a second connection line led out from the first connection line at a corner portion of a first pier column or a second pier column along a x-axis direction away from a connector conductor; a third connection line led out from the second connection line along a z-axis direction toward a lower yoke; and a fourth connection line led out from the third connection line along the x-axis direction toward the connector conductor.