Dynamic Voltage Control for Aircraft Power Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Aircraft electrical power distribution systems face inefficiencies due to constant low operating voltages set for highest altitude conditions, leading to increased transmission current and heat losses, which can be mitigated by dynamically adjusting voltages based on ambient pressure.
Innovation Solution
A method and system for dynamically adjusting the operating voltage of an aircraft's electrical power distribution system by determining ambient pressure and setting a target voltage, using existing sensors and control hardware to regulate the voltage, thereby reducing energy losses and thermal management burdens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If constant low operating voltage is used to ensure safety at highest altitude conditions, then electrical breakdown risk is reduced, but transmission current increases and heat losses increase
Solution Approach 1:
The patent applies dynamics by transitioning from a static constant voltage system to a dynamic voltage system that automatically adjusts operating voltage based on real-time ambient pressure measurements. The voltage is reduced at high altitudes to prevent electrical breakdown and increased at low altitudes to reduce transmission losses, making the system adaptive to changing environmental conditions.
Solution Approach 2:
The patent changes the operating voltage parameter dynamically based on ambient pressure conditions. By monitoring pressure changes and adjusting voltage accordingly, the system optimizes the voltage parameter to balance between preventing electrical breakdown at low pressure (high altitude) and minimizing I²R losses at high pressure (low altitude).
2Reliability
If constant low operating voltage is used to ensure safety at highest altitude conditions, then electrical breakdown risk is reduced, but transmission current increases
Solution Approach 1:
The system dynamically adjusts voltage based on ambient pressure, reducing voltage at high altitudes to prevent breakdown and increasing voltage at low altitudes to reduce transmission current, making the current transmission efficient under varying conditions.
Solution Approach 2:
The operating voltage parameter is changed dynamically in response to pressure changes, which directly affects transmission current. Higher voltage at low altitude reduces current for the same power transmission, while lower voltage at high altitude prevents breakdown.
3Loss of energy
If higher voltages are used during normal operation to reduce transmission current, then energy losses are reduced, but electrical breakdown risk increases at high altitude
Solution Approach 1:
The system dynamically adjusts voltage based on real-time pressure conditions, allowing high voltage operation during normal/low altitude conditions to reduce losses while automatically reducing voltage at high altitude to prevent arcing and electrical breakdown.
Solution Approach 2:
The system uses feedback from pressure sensors to continuously monitor ambient conditions and adjust voltage accordingly. When pressure decreases (indicating high altitude), the system reduces voltage to prevent breakdown; when pressure increases, it increases voltage to reduce transmission losses.
4Reliability
If constant low operating voltage is used, then safety is maintained across all conditions, but thermal management burden increases due to reduced current efficiency
Solution Approach 1:
The system dynamically adjusts voltage to optimize the balance between safety and thermal management. By increasing voltage at low altitude where breakdown risk is low, the system reduces transmission current and consequently reduces heat generation, lowering the thermal management burden.
Solution Approach 2:
The voltage parameter is changed dynamically to reduce I²R losses and heat generation during low altitude operation, while maintaining safe low voltage at high altitude. This adaptive parameter change directly impacts thermal management requirements.
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
This approach allows for higher voltages during lower altitudes, reducing transmission current and heat losses, while maintaining safety at higher altitudes, thus enhancing efficiency and reducing the thermal management burden on aircraft components.
Implementation Method 1
Due to the relationship between pressure and altitude, an altitude value may be taken to provide a measure of ambient pressure. In particular, the target operating voltage may be reduced as pressure decreases (e.g. due to aircraft altitude increasing). As electrical breakdown voltage generally decreases as pressure reduces, adjusting the voltage in this way may reduce the risk of arcing.
Data Source
AI summary
A method of operating an aircraft electrical power distribution system comprises determining a measure of ambient pressure; and setting a target operating voltage in accordance with the measure of ambient pressure. The method further comprises controlling the operating voltage in accordance with the set target operating voltage. The target operating voltage may refer to a distribution voltage of the aircraft. An aircraft electrical power distribution system is also disclosed, comprising: a sensor configured to determine a measure of ambient pressure; a controller configured to set a target operating voltage in accordance with the measure of ambient pressure, and a voltage regulator configured to regulate the operating voltage in accordance with the set target value.