High Voltage Electrical Connector Shielding Plate Design
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Solution Overview
Problem
Existing electrical connectors lack effective impedance matching and risk high-voltage breakdown, particularly in safely conveying high voltage signals.
Innovation Solution
An electrical connector design featuring an insulative housing with conductive terminals arranged in two rows, a metal shielding plate sandwiched between them, and a main shell, where the distance between internal terminals and the shielding plate is greater than that between grounding terminals and the plate, ensuring enhanced voltage withstand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the shielding plate is placed close to high-speed terminals for impedance matching, then impedance control is improved, but the risk of high-voltage breakdown increases
Solution Approach 1:
The shielding plate is designed with different local structures: a first shielding portion with smaller thickness opposing grounding terminals, and a second shielding portion with larger thickness opposing internal terminals. This local quality differentiation allows the shielding plate to provide both impedance matching (through the thinner first portion) and high-voltage protection (through the thicker second portion).
Solution Approach 2:
The shielding plate is segmented into functionally distinct portions: a first shielding portion for impedance matching with high-speed terminals, and a second shielding portion for high-voltage isolation from internal terminals. This segmentation allows each portion to be optimized for its specific function without compromising the other.
2Reliability
If the distance between internal terminals and shielding plate is increased for safety, then high-voltage breakdown risk is reduced, but impedance matching becomes difficult
Solution Approach 1:
Different portions of the shielding plate have different thicknesses to satisfy different requirements: the first shielding portion has smaller thickness for impedance matching, while the second shielding portion has larger thickness for high-voltage safety. This local quality approach resolves the contradiction by applying different geometric properties to different functional zones.
Solution Approach 2:
The thickness parameter of the shielding plate is varied across different regions: the first shielding portion has a smaller thickness value optimized for impedance matching, while the second shielding portion has a larger thickness value optimized for electrical isolation. This parameter change strategy allows simultaneous optimization of both contradictory requirements.
3Device complexity
If a thin conductive film is used for isolation, then device complexity is reduced, but the distance to terminals must be increased to prevent breakdown
Solution Approach 1:
The shielding plate transitions from a thin film concept to a structured plate with varied thickness. The thickness parameter is strategically changed: thinner near grounding terminals for impedance control, and thicker near internal terminals for enhanced electrical isolation, thereby maintaining simplicity while improving reliability.
Data Source
AI summary
An electrical connector includes: an insulative housing having a base portion; a number of conductive terminals affixed to the insulative housing and arranged in two rows, each conductive terminal comprising a contacting portion, and each row of conductive terminals comprising a pair of grounding terminals and a number of internal terminals located between the pair of grounding terminals; a metal shielding plate affixed to the insulative housing and sandwiched between the two rows of conductive terminals; and a main shell enclosing the insulative housing; wherein a distance between the contacting portions of the internal terminals and the metal shielding plate is greater than a distance between the contacting portions of the grounding terminals and the metal shielding plate.