Connector Assembly With Detachable Ferrite π-Filter for EMI Noise
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Solution Overview
Problem
Electrical noise generated by electronic devices in automotive environments causes electromagnetic interference (EMI), leading to malfunctioning of connected devices due to conductive noise, and existing solutions are inadequate in addressing this issue.
Innovation Solution
A connector device with a ferrite core and terminals configured in a pi (π)-type filter, where the ferrite core is detachably coupled to a second terminal, forming a pi (π)-type EMI filter, which includes a first and second capacitor connected to the circuit board, reducing circuit board mounting space and allowing easy ferrite core replacement without additional manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ferrite core is integrated into the connector structure, then EMI filtering performance is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The connector is divided into separate modular components: a basic connector body and a detachable ferrite core assembly. This allows the ferrite core to be added or removed independently based on EMI requirements, reducing inherent device complexity while maintaining filtering performance when needed.
Solution Approach 2:
The connector body is designed with universal features that can accommodate different ferrite core specifications. The same connector body can work with various ferrite cores depending on the EMI requirements, making the basic structure multi-functional and reducing overall system complexity.
2Stability of the object's composition
If a unitary ferrite core structure is used, then structural stability is improved, but adaptability and ease of specification adjustment are reduced
Solution Approach 1:
The ferrite core assembly transitions from a fixed unitary structure to a dynamic detachable structure. The ferrite core can be attached or detached from the connector body based on operational requirements, enabling flexible specification adjustment while maintaining structural stability when assembled.
Solution Approach 2:
Different ferrite core specifications (sizes, materials, inductance values) can be selected and attached to the same connector body depending on the required EMI filtering parameters. This allows easy adjustment of electrical and physical parameters without redesigning the entire connector.
3Manufacturing precision
If additional ferrite core manufacturing is required for specification changes, then manufacturing precision is improved, but productivity and cost-effectiveness decrease
Solution Approach 1:
By segmenting the ferrite core from the connector body into separate manufacturable components, each can be optimized independently. The connector body is manufactured once with universal features, while only the ferrite core needs to be changed for specification adjustments, dramatically improving productivity.
Solution Approach 2:
Standardized connector bodies serve as reusable templates that can accommodate different ferrite core specifications. Once the connector body design is validated, multiple ferrite core variations can be developed using the same base structure, reducing manufacturing complexity and improving specification adjustment efficiency.
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 connector device effectively reduces electromagnetic interference by implementing a low-cost pi (π)-type filter with increased conductible current, while facilitating easy ferrite core replacement and optimal specification adjustments.
Implementation Method 1
a ferrite core through which the second terminal passes
Implementation Method 2
forming a pi (π)-type EMI filter
Data Source
AI summary
A connector device electrically connected to a circuit board includes: a body portion connected externally; a housing surrounding at least a portion of the body portion; a first terminal extending downward from the body portion and connected to a first capacitor of the circuit board; a second terminal extending downward from the body portion to be spaced apart from the first terminal and connected to a second capacitor of the circuit board; and a ferrite core through which the second terminal passes.