Magnetic Holding Adapter for Arc-Safe DC Busbar Connection
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Solution Overview
Problem
DC power supplies pose challenges such as spark gaps or arcing when contacts are close to or fully contacted with conductors during connection or disconnection in DC busbars, which are not present in AC power systems.
Innovation Solution
A holding adapter with a permanent magnet is used to deflect and extend the arc path, combined with current limitation, to prevent arcing by altering the geometry of the arc and ensuring it extinguishes before it can sustain itself.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contacts are brought close to or fully contacted with conductors during connection or disconnection in DC busbars, then electrical connection is established or broken, but spark gaps or arcing occur which are not present in AC power systems
Solution Approach 1:
A permanent magnet is introduced as an intermediary element between the contact and the conductor. The magnet generates a magnetic field that deflects the arc path, preventing direct contact between the arc and the conductor, thereby eliminating the harmful effects of arcing and sparking while maintaining reliable electrical connection
Solution Approach 2:
The solution moves the problem from a one-dimensional contact interface to a three-dimensional spatial control by using the magnetic field to extend and deflect the arc path in additional dimensions. This prevents the arc from sustaining itself by directing it away from the conductor surface
2Object-affected harmful factors
If a permanent magnet is used to deflect and extend the arc path, then arcing is reduced, but the device complexity increases
Solution Approach 1:
The permanent magnet is designed to automatically generate the necessary magnetic field when the adapter approaches the conductor, eliminating the need for external power supplies, control circuits, or active components. The magnet self-regulates the arc path based on its inherent magnetic properties, reducing device complexity while maintaining arcing protection
Solution Approach 2:
The solution changes the physical state and properties of the arc path by introducing a magnetic field, which alters the arc's geometry and behavior. This parameter change (from purely electrical to magnetically influenced) achieves arcing reduction without requiring complex mechanical or electronic control mechanisms
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 system effectively reduces the risk of arcing by geometrically extending the arc path and limiting current, providing a safer and more reliable electrical connection in DC busbars.
Implementation Method 1
The holding adapter has at least one permanent magnet
Implementation Method 2
The invention also relates to the use of a permanent magnet for reducing the risk of arcing between a contact of a holding adapter and conductors in a DC voltage-carrying busbar, preferably by extending the path of an arc by deflection
Data Source
Figure 1
AI summary
A system comprises: - a DC voltage supply with an amplitude in the range from 75 V to 1500 V, - a busbar supplied by the DC voltage supply, - a rotatable holding adapter (1) for detachable electrical connection to conductors in the busbar and mechanical mounting in the busbar, wherein the holding adapter has at least one permanent magnet (5). A rotatable holding adapter (1) for detachable electrical connection to conductors in the busbar and mechanical mounting in a DC busbar has connection contacts for rotary contacting of DC conductors of the DC busbar, wherein the holding adapter has a permanent magnet (5).