Shielded Connection Jig for High-Voltage Test Chamber Feedthroughs
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Solution Overview
Problem
Existing withstand voltage test devices face issues with noise leakage and discharge through the cable hole of the test chamber when a high voltage load is applied.
Innovation Solution
A connection jig with an electromagnetic shield and insulating holding and regulation portions is used to cover the space between the holding and regulation portions, regulating the conductor's position and preventing noise leakage and discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wiring is passed through a cable hole in the test chamber, then electrical connection is achieved, but noise leakage and discharge occur when high voltage is applied
Solution Approach 1:
The connector is nested within the holding portion made of electrically insulating material. The conductor is nested within the electromagnetic shield, which is in turn nested within the holding portion. This multi-level nesting structure provides layered protection: the electromagnetic shield contains electromagnetic noise and prevents discharge, while the insulating holding portion provides additional electrical isolation, thus achieving reliable electrical connection without noise leakage or discharge
Solution Approach 2:
The electromagnetic shield acts as an intermediary between the conductor and the external environment, blocking electromagnetic noise and preventing discharge through the cable hole. The insulating holding portion serves as another intermediary layer between the shielded conductor and the test chamber interior, providing additional electrical isolation and structural support, thus resolving the contradiction between maintaining electrical connection and preventing harmful effects
2Ease of operation
If a connector jig is provided to avoid inserting wiring into the cable hole, then wire connection work is simplified, but measures against high voltage are not taken
Solution Approach 1:
The invention merges the functions of the connector jig with high voltage protection features into a single integrated structure. The holding portion and electromagnetic shield are combined with the connector to form a unified assembly that both simplifies wiring operation and provides comprehensive high voltage safety measures, thus achieving both ease of operation and high voltage reliability simultaneously
Solution Approach 2:
The connector assembly serves multiple functions: it provides mechanical connection for wiring, electromagnetic shielding for noise and discharge protection, electrical insulation through the holding portion, and structural support. This multi-functional design eliminates the need for separate high voltage protection measures while maintaining ease of operation, thus resolving the contradiction between operational simplicity and safety
3Object-affected harmful factors
If electromagnetic shield covers the space between holding and regulation portions, then noise leakage and discharge are prevented, but heat storage influences test chamber temperature
Solution Approach 1:
The electromagnetic shield and insulating holding portion are designed with specific local properties: the shield provides electromagnetic containment where needed, while the insulating material provides thermal isolation. The structure is optimized to provide high electromagnetic shielding effectiveness in the cable hole region while minimizing overall heat storage through strategic material selection and geometry design, thus balancing noise/discharge prevention with temperature stability
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 effectively prevents noise leakage and discharge, reduces heat storage influence on the test chamber temperature, and maintains the integrity of the test environment.
Implementation Method 1
an electromagnetic shield having a size conforming to a hole formed in a wall body of the test chamber and disposed so as to cover a space between the holding portion and the regulation portion
Implementation Method 2
a holding portion holding a connector portion and made of an electrically insulating material; a regulation portion disposed at a position spaced apart from the holding portion and made of an electrically insulating material
Data Source
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AI summary
A connection jig includes: a holding portion made of an electrically insulating material that holds a first connector portion; a regulation portion disposed at a position spaced apart from the holding portion and made of an electrically insulating material; an electromagnetic shield having a size conforming to a hole formed in a wall body of a test chamber and disposed so as to cover a gap space between the holding portion and the regulation portion; and a conductor connected to the first connector portion and including a portion disposed in the gap space. The conductor is connected to a second connector portion fixed to the regulation portion.