Insulated Conductor Transient Filtering in Aircraft Power Systems
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Solution Overview
Problem
In electrical architectures for vehicles, particularly in aeronautics, the separation of converters from loads leads to static waves on electrical conductors due to abrupt voltage edges, causing overvoltages that can prematurely age components, and existing solutions like filtering with inductors increase mass and energy losses.
Innovation Solution
A passive matching system using insulated electrical conductors with one end unconnected, forming an open line, which attenuates transient phenomena without energy consumption, reducing the need for inductors and minimizing mass addition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power inductors are used to filter static waves on electrical conductors, then transient phenomena are reduced, but mass increases and energy losses occur
Solution Approach 1:
The patent extracts the filtering function from traditional power inductors and relocates it to the load terminals through RC circuits. This removes the need for large mass inductors in the power supply line while maintaining transient phenomenon filtering capability at the point of load connection.
Solution Approach 2:
The patent introduces RC circuits as intermediary elements at the load terminals. These circuits act as mediators that filter transient phenomena locally without requiring large inductors in the main power conductors, thus reducing mass while maintaining filtering effectiveness.
2Object-affected harmful factors
If voltage edges are softened in converters, then static waves are reduced, but switching losses increase and heating occurs
Solution Approach 1:
The patent applies preliminary anti-action by pre-configuring RC circuits at the load terminals before transient phenomena reach the load. The RC circuits are prepared in advance to absorb and dampen voltage spikes and static waves, preventing harmful effects without requiring softening of converter switching edges.
Solution Approach 2:
The patent converts the harmful static waves and transient phenomena into beneficial effects by using RC circuits to dissipate energy through controlled resistance. The transient energy that would otherwise damage components is converted into harmless heat in the RC circuit resistors, protecting the load while maintaining efficient converter switching.
3Reliability
If converters are separated from loads, then reliability and maintainability improve, but static waves are generated on connecting conductors
Solution Approach 1:
The patent segments the electrical system into distinct converter and load portions with RC filtering circuits placed at the load terminals. This segmentation allows independent maintenance and replacement of converters and loads while the RC circuits at each segment boundary filter static waves generated during separation and connection operations.
Solution Approach 2:
The patent introduces RC circuits as intermediary elements at the connection points between converters and loads. These intermediaries filter static waves generated during separation operations while maintaining the beneficial independence and reliability of separated converter and load components.
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 filters transient phenomena, reducing overvoltages and energy losses while maintaining low mass, improving the reliability and efficiency of power supply to loads.
Implementation Method 1
a passive matching system for the line connecting the converter to the load
Implementation Method 2
The insulated electrical conductors have a length greater than or equal to 1 m... effectively filters transient phenomena
Data Source
AI summary
A filtering of a load in an electrical architecture is provided. The load is equipped with power supply terminals allowing it to be connected to an electrical line of the architecture. The electrical architecture comprises, in addition to the connection to the electrical line and associated with each of the power supply terminals, an insulated electrical conductor connected, at a first of its ends, to the terminal under consideration, and not connected at a second of its ends.