Coaxial Shunt Structure for Stable High-Frequency Current Detection
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Solution Overview
Problem
Conventional coaxial shunts suffer from poor stability and short service life due to external forces affecting the resistor body, leading to measurement errors and potential damage during high-frequency current detection.
Innovation Solution
A coaxial shunt design featuring an outer conductor, resistor body, central shaft conductor, and insulating filler, with an insulating connector mechanically connecting the outer conductor and central shaft conductor to stabilize their relative positions, and optionally a flexible electric connection between the central shaft conductor and resistor body to buffer external forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the center shaft conductor is connected to the resistor body through welding or threaded connection, then the coaxial shunt can be assembled and function, but the resistor body is directly affected by external forces causing damage and short service life
Solution Approach 1:
The patent introduces an insulating connector as a separate component that divides the force transmission path from the center shaft conductor. The connector is mechanically connected to both the center shaft conductor and outer conductor, creating a segmented structure where the resistor body is isolated from direct mechanical stress while maintaining electrical functionality.
Solution Approach 2:
The insulating connector serves as an intermediary element between the center shaft conductor and the outer conductor/resistor body assembly. It mechanically transmits and distributes external forces away from the resistor body, preventing direct force application while maintaining the structural integrity and electrical connection of the coaxial shunt.
2Measurement precision
If the center shaft conductor is fixed to the resistor body, then the electrical connection is stable, but external forces cause tensile and twisting forces that change resistance value and reduce measurement precision
Solution Approach 1:
The insulating connector acts as a mediator that decouples the mechanical stress from the resistor body while maintaining electrical connectivity. It absorbs and distributes external forces through its mechanical connection to the outer conductor, preventing force transmission to the resistor body and thus maintaining both measurement precision and structural stability.
Solution Approach 2:
The patent extracts the mechanical force transmission function from the resistor body by introducing the insulating connector. The connector specifically handles the mechanical loading while the resistor body focuses solely on its electrical function, separating the mechanical and electrical roles to prevent force-induced resistance changes.
3Measurement precision
If the center shaft conductor penetrates through the outer conductor and connects to the resistor body, then the coaxial structure is formed for high-frequency current detection, but the resistor body is vulnerable to external forces during mounting and fixing
Solution Approach 1:
The insulating connector serves as a protective intermediary that shields the resistor body from external forces during mounting and operation. It mechanically links the center shaft conductor to the outer conductor, creating a force distribution path that bypasses the resistor body, thereby maintaining both the coaxial structure's detection capability and the resistor body's mechanical strength.
Solution Approach 2:
The insulating connector provides beforehand cushioning by being pre-installed and mechanically connected to both the center shaft conductor and outer conductor. This pre-established mechanical connection creates a protective buffer that absorbs and distributes external forces before they can reach the resistor body, preventing damage during mounting and fixing operations.
Data Source
AI summary
Provided is a coaxial shunt, including an outer conductor, a resistor body, a central shaft conductor, and an insulating filler. The outer conductor, the resistor body, and the central shaft conductor each are of cylindrical structures and are coaxially arranged from outside to inside. An insulating connector is arranged between the outer conductor and the central shaft conductor. The insulating connector is mechanically connected to both the outer conductor and the center shaft conductor and/or the center shaft conductor and the resistor body are electrically flexibly connected. The coaxial shunt provided by the present disclosure ensures the stable and reliable resistor body by arranging the flexible electric connection mode between the insulating connector and/or the center shaft conductor and the resistor body. Further provided is a current detection system using the coaxial shunt.