Power Supply EMI Shielding Assembly with Integrated Grounding Pins
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Solution Overview
Problem
Existing power supply designs face challenges with poor heat dissipation, slow lightning discharge speed, complex structure, and high manufacturing costs due to the placement of electromagnetic interference (EMI) filter circuits and lightning protection components, which affect internal airflow and increase costs.
Innovation Solution
An electromagnetic shielding assembly with a plate body and bending portion covering the input socket, featuring grounding pins for secure fixation and high conductivity, an annular iron core for filtering, and a lightning protection circuit with surge absorbers, simplifying the structure and enhancing heat dissipation and lightning discharge efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the electromagnetic interference filter circuit is disposed on a small board perpendicular to the main circuit board, then the EMI filtering function is achieved, but the internal airflow is affected and heat dissipation becomes poor
Solution Approach 1:
The patent combines the EMI shielding function with the grounding structure by integrating the grounding pins directly into the shielding component. This merging eliminates the need for separate fixation fixtures and reduces the number of components, thereby simplifying the structure and improving airflow paths for better heat dissipation while maintaining EMI filtering effectiveness.
Solution Approach 2:
The shielding component is designed to serve multiple functions: EMI shielding, grounding, and structural fixation. The grounding pins serve both as electrical connection points and as mechanical fixation elements, eliminating the need for separate fixtures. This multi-functionality reduces component count and simplifies assembly while maintaining effective EMI filtering and improving thermal management through optimized airflow.
2Reliability
If additional fixtures are used to fix the electromagnetic shielding component, then the shielding component is securely fixed, but the structure becomes complicated and manufacturing cost increases
Solution Approach 1:
The patent merges the fixation function into the grounding pins themselves. The grounding pins serve dual purposes: providing electrical grounding and serving as mechanical fixation elements through screw connections. This eliminates the need for separate fixation fixtures, reducing structural complexity and manufacturing cost while maintaining secure fixation and reliable grounding.
Solution Approach 2:
The grounding pins are designed as multi-functional components that simultaneously provide electrical connection and mechanical fixation. This universal design reduces the total number of components needed, simplifies the overall structure, and lowers manufacturing costs while ensuring both secure fixation and effective grounding for the EMI shielding component.
3Speed
If the grounding distance is increased for lightning protection, then the discharge speed improves, but the structure becomes more complex and cost increases
Solution Approach 1:
The patent combines the lightning protection grounding path with the EMI shielding grounding structure. The same grounding pins and housing connection paths used for EMI shielding also serve as the grounding path for lightning protection. This merging provides an effective discharge path for lightning currents without requiring additional grounding components or increasing structural complexity.
Solution Approach 2:
The grounding system is designed to serve multiple protection functions simultaneously. The housing and grounding pins provide both EMI shielding grounding and lightning protection grounding paths. This multi-functional grounding system achieves effective lightning discharge without additional components, maintaining structural simplicity while providing comprehensive protection.
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 provides enhanced heat dissipation, high lightning discharge speed, simplified structure, and reduced manufacturing costs by utilizing the electromagnetic shielding assembly as both an EMI shielding and lightning discharge path, while eliminating the need for additional fixtures and reducing wiring area on the main circuit board.
Implementation Method 1
an electromagnetic shielding assembly adapted for a power supply and including an electromagnetic interference shielding component
Implementation Method 2
at least one grounding pin disposed on at least one of the plate body and the bending portion and configured to ground with and screw to a housing of the power supply
Data Source
AI summary
The present invention discloses an electromagnetic shielding assembly including an electromagnetic interference shielding component including a plate body and a bending portion. An included angle is formed between the plate body and the bending portion, and the plate body and the bending portion cover an input socket of a power supply. The electromagnetic interference shielding component includes at least one grounding pin disposed on the plate body or/and the bending portion and configured to ground with and screw to a housing of the power supply, and a welding pin disposed on a side of the bending portion away from the plate body and electrically connected to an auxiliary circuit board. The electromagnetic interference shielding component provides functions of EMI shielding, lightning (current) discharging and fixture, which can simplify the structure, increase the discharging speed and time, and reduce the amount of disturbance of the large current instantaneous to the ground.