Self-Passivating Connector Power Transfer Without Polarity Reversal
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Solution Overview
Problem
Electrical contacts made from self-passivating transition metals, which form non-conductive passivation layers, are unsuitable for applications with rapid polarity reversal due to insufficient time for effective film formation, leading to current leakage and short circuits.
Innovation Solution
Transforming alternating current into constant-polarity or pulsed voltage signals to prevent polarity reversal on self-passivating contacts, using an AC deconstruction circuit to convert AC into DC and then reconstructing it back into AC using a DC to AC reconstruction circuit, ensuring contacts are not subjected to polarity reversal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If alternating current is applied to self-passivating contacts, then power transmission is enabled, but the passivation layer cannot form effectively due to rapid polarity reversal, causing current leakage and short circuits
Solution Approach 1:
The patent applies preliminary action by converting AC to DC before the contacts are subjected to current flow, ensuring the passivation layer has sufficient time to form under constant polarity conditions. The AC-to-DC conversion circuitry transforms the alternating current into direct current, which maintains steady polarity on the self-passivating contacts, allowing the protective oxide layer to develop fully before any current transmission occurs.
Solution Approach 2:
The patent changes the electrical parameter from alternating current with rapid polarity reversal to direct current with constant polarity. This parameter transformation fundamentally alters the operating conditions of the self-passivating contacts, enabling the passivation layer to form effectively. The system modifies the current type and polarity stability to match the requirements of the self-passivating material.
2Reliability
If self-passivating contacts are used to prevent current leakage, then contact reliability improves, but they cannot tolerate rapid polarity reversal in AC applications
Solution Approach 1:
The patent introduces an intermediary AC-to-DC conversion system between the AC power source and the self-passivating contacts. This intermediary circuitry transforms the incompatible AC signal into a compatible DC signal that the self-passivating contacts can handle reliably. The conversion circuit acts as a mediator that reconciles the mismatch between AC requirements and the limitations of self-passivating materials.
Solution Approach 2:
The patent changes the electrical parameters from AC (alternating polarity) to DC (constant polarity) to make the system compatible with self-passivating contacts. This parameter transformation enables the contacts to maintain their protective passivation layer while still allowing power transmission. The system adapts the electrical characteristics to suit the material properties of the self-passivating contacts.
3Reliability
If polarity reversal is prevented on self-passivating contacts, then current leakage is reduced, but additional circuitry is required to convert AC to DC and back to AC
Solution Approach 1:
The patent extracts the polarity reversal problem from the contact design itself and relocates it to the circuit level. Instead of trying to make the contacts tolerate polarity reversal, the solution removes the alternating polarity component entirely by converting to DC before the contacts. This extraction separates the contact function (reliable power transmission with passivation) from the AC adaptation function (handled by conversion circuitry).
Solution Approach 2:
The patent creates a universal power transmission system that can work with self-passivating contacts by implementing AC-to-DC conversion. This multi-functional approach allows the same contact design to be used in both AC and DC applications, with the conversion circuitry adapting the input power type. The system becomes universally applicable to self-passivating contact technologies regardless of the source power type.
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
Enables the use of self-passivating contacts in applications with rapid polarity reversal by preventing disruption of non-conductive passivation layers, reducing current leakage and ensuring reliable power transmission across electrical connectors.
Implementation Method 1
electrical contacts made from a self-passivating transition metal, which forms a non-conductive passivation layer on surfaces of the positive contact when the contact is exposed to water or other electrolytes
Implementation Method 2
the AC deconstruction circuit is configured to transform the alternating current into first and second constant-polarity pulsed voltage signals
Implementation Method 3
the AC reconstruction circuit is configured to transform the first and second constant-polarity pulsed voltage signals back into alternating current
Data Source
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AI summary
Methods and systems to transform an alternating current into constant-polarity constant or pulsed voltages, provide these to a first group of contacts of an electrical connector assembly such that none of the contacts is subjected to polarity reversal, receive the constant-polarity constant or pulsed voltages from a second group of contacts of the electrical connector assembly, and reconstruct the alternating current from these voltages.