Aircraft Power Network Voltage Control via Paschen's Law
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Solution Overview
Problem
High-voltage electrical propulsion systems in aircraft face challenges with uncontrolled electric arcs and partial discharges due to varying altitudes, leading to insulation damage and equipment failures, as standard circuit breakers are not designed to operate effectively above 1500 m and are insufficient for aeronautical pressurized zones.
Innovation Solution
A system that adjusts voltage levels based on altitude and other parameters using a control device configured to follow Paschen's law with a predefined margin, allowing for variable voltage delivery through a main source such as a variable frequency generator or permanent magnet generator, to optimize electrical network performance and prevent electric arcs and partial discharges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-voltage circuit breakers and contactors are used to protect the electrical network, then the network protection capability is improved, but the equipment becomes voluminous and particularly heavy
Solution Approach 1:
The patent replaces traditional mechanical high-voltage circuit breakers and contactors with semiconductor-based protection devices. This substitution eliminates the need for voluminous expansion chambers and mechanical moving parts, dramatically reducing equipment weight while maintaining protection capability through electronic control and semiconductor switching devices.
Solution Approach 2:
The patent changes the operating parameters of protection devices by using semiconductor materials with different electrical characteristics than traditional mechanical breakers. This allows for compact, lightweight designs that can operate at high voltages without requiring the large physical dimensions of conventional electromagnetic or mechanical protection equipment.
2Weight of moving object
If standard circuit breakers are used, then the equipment is compact and lightweight, but they are not sized to operate above an altitude of approximately 1500 m
Solution Approach 1:
The patent uses semiconductor-based protection devices whose operating characteristics can be adjusted through parameter changes rather than physical design changes. This allows the same compact equipment to adapt to varying altitude conditions by modifying electrical parameters such as breakdown voltage thresholds and switching characteristics, enabling operation from sea level up to typical cruise altitudes.
Solution Approach 2:
The patent implements dynamic adaptation of protection device characteristics based on operating conditions. The semiconductor-based system can dynamically adjust its protection thresholds and response characteristics according to altitude, temperature, and electrical load conditions, providing versatile operation across the full altitude range without requiring multiple specialized devices.
3Reliability
If two dissimilar means of protection are used to protect the networks, then the certification requirements are met, but the risk of uncontrolled electric arcs or partial discharges increases
Solution Approach 1:
The patent merges multiple protection functions into a single integrated semiconductor-based protection system. By combining overcurrent protection, overvoltage protection, and arc detection functions into one unified device, the system eliminates the interfaces and coordination gaps between dissimilar protection means, thereby reducing the risk of uncontrolled electric arcs and partial discharges while still meeting certification requirements.
Solution Approach 2:
The patent implements continuous feedback monitoring of electrical parameters including current, voltage, and arc detection. The semiconductor protection system uses real-time feedback to detect early signs of partial discharges and electric arcs, allowing it to respond preemptively by adjusting protection thresholds or isolating affected sections, thereby preventing uncontrolled arcs while maintaining certification compliance.
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 limits the occurrence of electric arcs and partial discharges, ensuring reliable electrical power supply across different aircraft phases by dynamically adjusting voltage levels according to altitude and other parameters, thus enhancing the safety and efficiency of electrical networks.
Implementation Method 1
A system that adjusts voltage levels based on altitude and other parameters using a control device configured to follow Paschen's law with a predefined margin
Data Source
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AI summary
The present invention concerns a system for supplying power to at least one electrical load of an aircraft, this system comprising a main power source (16) connected to at least one electrical load (12) via an electrical network (14), the system comprising a control device (18) connected to the main power source and configured to deliver a variable voltage level to the electrical network according to a predetermined voltage variation law depending on at least one parameter characterising the altitude of the aircraft and according to Paschen's law with a predefined margin.