Resistive Switching Device With Intermediate Overcurrent Damping
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Solution Overview
Problem
Conventional electrical switches struggle with controlling switching arcs, especially in direct current applications, and lack intermediate states for managing overcurrents effectively, leading to material contamination and unreliable galvanic isolation.
Innovation Solution
A switching device with a controllable resistance element that allows for intermediate states between ON and OFF, utilizing a mechanical transit movement to dissipate switching energy as power loss and introduce damping without interrupting the circuit, featuring a movable and fixed cylindrical element with contact systems for adjustable resistance and galvanic isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrical switches control switching arcs using ionization arcing chambers, then the arc is extinguished, but material loss and contamination occur due to ionizing gas formation at high temperatures
Solution Approach 1:
The patent extracts the arc extinction function from the traditional ionization arcing chamber and relocates it to a magnetic field-based solution. The arc is guided into a magnetic field where it is extinguished through magnetic confinement and cooling, eliminating the need for ionization chambers that cause material contamination.
Solution Approach 2:
A magnetic field is introduced as an intermediary mechanism between the contacts and the arc. The magnetic field serves as a mediator that confines, cools, and extinguishes the arc without direct contact with the contacts, thereby preventing material loss and contamination while maintaining reliable arc extinction.
2Object-affected harmful factors
If semiconductor switches are used to eliminate switching arcs, then arc-related damage is reduced, but complex control electronics and galvanic isolation issues arise
Solution Approach 1:
The patent replaces the electronic control system with a magnetic field-based arc control mechanism. Instead of using complex semiconductor switches and control electronics, the invention uses magnetic fields to confine and extinguish arcs, maintaining simplicity while eliminating arc-related damage.
3Device complexity
If conventional switches only recognize ON and OFF states, then the control system is simple, but intermediate damping states for overcurrent protection are unavailable
Solution Approach 1:
The patent introduces dynamic arc control through magnetic field adjustment, enabling the switch to operate in intermediate states. By dynamically adjusting the magnetic field strength, the system can provide variable damping for overcurrent protection while maintaining simple ON/OFF control architecture.
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 defined damping of circuits, ensuring high availability and protection against overcurrents without interruption, suitable for applications with rapidly changing loads, and allows for potential switching between two potentials without hard disconnection.
Implementation Method 1
the switching energy in the controllable resistance element is dissipated in the form of electrical power loss
Data Source
Figure 1~2B
Figure 3A~3C
Figure 4A~4C
AI summary
The invention relates to a switching device (1000) having an ON state, an OFF state for opening, closing or commutating a circuit between a first contact (110) and a second contact (120), and further intermediate states between the ON state and OFF state, as well as having a controllable resistor element (200) which is electrically arranged between the first contact (110) and the second contact (120), the switching device (1000) being closed in the ON state and open in the OFF state, the state of the switching device (1000) being changed by means of a mechanical transit movement (T), wherein the transit movement (T) is performed in such a way that the current voltage drop at any point in time is smaller than the ignition voltage of an arc, and the switching energy in the controllable resistor element (200) is thereby dissipated in the form of electrical power loss, and wherein, in the event of overcurrents below an overcurrent threshold value, the controllable resistor element (200) is transferred to an intermediate state by the transit movement (T), such that electrical attenuation is introduced into the circuit without interrupting the latter.