Power Terminal Structure With Integrated Capacitor EMI Filtering
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Solution Overview
Problem
Existing power interfaces suffer from poor filtering effect and anti-magnetic interference due to the placement of filter capacitors far away from the positive and negative electrodes on a PCB, affecting normal operation.
Innovation Solution
A power terminal structure with a housing containing adjacent positive and negative electrodes, a filter capacitor between them, and optional features like a common-mode magnetic ring, series-connected filter capacitors, and a connector for improved filtering and anti-magnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter capacitor is arranged on a PCB of a power interface, then the power interface can operate in an electromagnetic environment, but the filter capacitor is far away from the positive and negative electrodes, resulting in poor filtering effect and anti-magnetic interference ability
Solution Approach 1:
The patent integrates the filter capacitor directly into the power terminal structure, merging it with the positive and negative electrodes within the same housing. This combination eliminates the spatial separation between the capacitor and electrodes, enabling the capacitor to effectively filter electromagnetic interference at its source while maintaining a compact design.
Solution Approach 2:
The housing serves as an intermediary structure that positions the filter capacitor in close proximity to the positive and negative electrodes. This intermediate arrangement allows the capacitor to function as an effective shield and filter without requiring external PCB mounting, thus improving anti-magnetic interference ability while maintaining structural integrity.
2Reliability
If multiple filter capacitors are arranged in series, then the filtering effect is improved, but the device complexity increases
Solution Approach 1:
The patent divides the filtering function into multiple segments by arranging several filter capacitors in series between the positive and negative electrodes. Each capacitor contributes to the overall filtering effect, creating a stepped improvement in anti-interference capability. This segmentation allows the system to achieve superior filtering performance through multiple smaller filtering stages rather than a single complex capacitor.
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
Enhances filtering effect and anti-magnetic interference by locating the filter capacitor near the electrodes, improving structural integrity and safety through series connections and protective measures.
Implementation Method 1
a filter capacitor arranged between the positive electrode and the negative electrode; the filter capacitor is connected to the positive electrode by the first connection part, and the filter capacitor is connected to the negative electrode by the second connection part
Implementation Method 2
the power terminal structure further comprises a common-mode magnetic ring arranged on the housing; the positive electrode is protrusively provided with a first conductive part, the negative electrode is protrusively provided with a second conductive part, and both the first and second conductive parts can extend out of the housing to pass through the inner ring of the common-mode magnetic ring
Data Source
Figure 1~2
Figure 3~4
AI summary
The present disclosure relates to the field of power interface technology, specifically disclosing a power terminal structure and a power interface. The power terminal structure comprises a housing, a positive electrode, a negative electrode, and a filter capacitor, wherein the positive electrode and the negative electrode are located inside the housing; one end of the positive electrode is protrusively provided with a first connection part, one end of the negative electrode is protrusively provided with a second connection part, the positive electrode and the negative electrode are adjacent to each other, and the filter capacitor is arranged between the positive electrode and the negative electrode, wherein the filter capacitor is connected to the positive electrode by the first connection part, and the filter capacitor is connected to the negative electrode by the second connection part. In the present disclosure, the filter capacitor is located near the positive electrode and the negative electrode to improve the filtering effect and anti-magnetic interference ability of the power supply end.