Electrical Connector Anti-Arcing Insulating Barrier
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Solution Overview
Problem
Electrical connectors face hazards of arcing and reduced lifespan when connected or disconnected while current is flowing, especially with direct current, as existing solutions either add bulk and cost or fail to prevent arcing through indirect paths.
Innovation Solution
An electrical connector design featuring insulating barriers that extend beyond contacts to block through-air paths and using high resistance metals for contacts to reduce arcing, without additional switching devices, ensuring user safety and extended connector life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate shorter set of contacts and switching device is added to shut off current before separation, then arcing is suppressed, but device complexity and bulk increase
Solution Approach 1:
An insulating barrier is introduced as an intermediary element between the male and female contacts. This barrier physically blocks the air path that would otherwise allow arc formation during connector separation, suppressing arcing without requiring additional switching devices or contacts.
Solution Approach 2:
The electrical resistance parameter is changed by using a metal with low electrical conductivity for the contact leading edge. This increases resistance immediately before separation, lowering the electrical current and energy available for arcing, thereby suppressing arcs through parameter modification rather than structural complexity.
2Object-affected harmful factors
If an insulating barrier is added to block through-air paths, then direct arcing is prevented, but indirect arcing paths may still exist and device complexity increases
Solution Approach 1:
The insulating barrier function is merged with the existing contact structure by forming the barrier as an integral part of the connector housing or contact assembly. This integration approach prevents direct arcing while avoiding the need for separate, additional components that would increase device complexity.
Solution Approach 2:
The electrical resistance parameter is modified by using low conductivity metal for the contact leading edge, which suppresses arcing energy at its source. This parameter change complements the insulating barrier by addressing indirect arcing paths through material property modification rather than adding more structural elements.
3Object-generated harmful factors
If the leading edge of contacts is made from low electrical conductivity metal, then arcing energy is reduced, but contact resistance increases during normal operation
Solution Approach 1:
Different parts of the contact structure are assigned different material properties: the leading edge uses low conductivity metal to suppress arcing, while the main contact body uses high conductivity metal for low resistance during normal operation. This local differentiation resolves the contradiction between arc suppression and operational reliability.
Solution Approach 2:
The contact is segmented into two functional zones: a leading edge segment made of low conductivity metal for arc suppression, and a main contact segment made of high conductivity metal for low resistance operation. This segmentation allows each segment to optimize its material properties for its specific function without compromising the other.
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
Effectively suppresses arcing between separated contacts during connection and disconnection, protecting users from burns and extending connector lifespan without increasing system bulk or cost.
Implementation Method 1
an insulating barrier that suppresses arcing between separated contacts during connection and disconnection of the electrical contacts
Implementation Method 2
constructing the leading edge of at least one of the electrical contacts from a metal having low electrical conductivity, so that the electrical resistance of the connection is significantly increased immediately before the contacts are separated, thereby lowering the electrical current and the energy available for electrical arcing
Implementation Method 3
at least one of the electrical contacts in at least one of the connectors is a bi-metal contact having a metallic composition that is configured to create within the contact an operating segment that has low resistance and a transitional segment that has high resistance
Data Source
AI summary
A novel connector pair suppresses arcing during connection and disconnection. In one general aspect of the invention, first and second insulating barriers are configured to extend beyond corresponding first and second contacts, the barriers being arranged to cover a leading end of at least one of the contacts, and to engage with each other when the contacts are separated by a small gap, thereby closing off substantially all through-air arcing paths between them. In another general aspect of the invention, at least one electrical contact in a connector pair is a bimetal contact having a transitional segment made from high resistivity metal. The transitional segment is configured to make first and last contact during the initial phases of mating and un-mating, thereby increasing electrical resistance and significantly lowering the electrical current and the energy available for electrical arcing.