Aircraft Supplemental Power System Segmentation
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Solution Overview
Problem
Twin engine aircraft often require larger main generators to meet peak power demands, which increases weight and reduces efficiency, as backup generators are typically not used under normal conditions and are not optimized for size.
Innovation Solution
A supplemental electrical power system that includes two supplemental generators, each driven by an engine, and a power conversion system that selectively couples power from these generators to the main power distribution system, allowing them to supplement and backup the main generators, enabling the use of smaller main generators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If larger main generators are used to meet peak power demands, then power supply capability is improved, but aircraft weight increases
Solution Approach 1:
The power generation system is segmented into multiple independent generators (first supplemental generator and second supplemental generator), each capable of operating independently or in combination. This allows the main generators to be sized for normal operation while supplemental generators provide additional capacity during peak demand, avoiding the need for oversized main generators that would increase weight.
Solution Approach 2:
The supplemental generators are designed to serve multiple functions: they can operate independently during normal conditions, provide backup during generator failure, and combine with main generators during peak power demand. This multi-functionality allows a single generator design to handle various operating scenarios without requiring separate specialized equipment for each function.
2Reliability
If backup generators are included in the system, then system reliability is improved, but device complexity increases
Solution Approach 1:
The backup and supplemental power functions are merged into the same generator units. The first and second supplemental generators are designed to serve both as backup generators and as additional power sources during peak demand. This consolidation reduces the number of separate systems needed and simplifies the overall power architecture while maintaining reliability.
Solution Approach 2:
The supplemental generators are designed with universal functionality to operate in multiple modes: as primary power sources, as backup generators, or in combination with main generators. This multi-functionality reduces system complexity by eliminating the need for separate dedicated backup systems and peak demand systems.
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 configuration reduces the weight of the aircraft by allowing smaller main generators, increases efficiency by redistributing engine load, and provides sufficient power during peak demands or backup situations.
Implementation Method 1
a first power converter, a second power converter
Data Source
AI summary
Supplemental power systems for aircraft are described. One example is a power conversion system for an electrical power system in a twin engine aircraft having a first generator and a second generator is described. The power conversion system includes a first branch, a second branch, and a selector. The first branch has a first input, a first power converter, and a first output configured for coupling to an aircraft electrical distribution system. The second branch includes a second input, a second power converter, and a second output configured for coupling to the aircraft electrical distribution system. The selector is coupled between the first branch and the second branch. The selector is configured to selectively connect the first generator to the first branch or to the first and second branches. The selector is also configured to selectively connect the second generator to the second branch or the first and second branches.