Aircraft Cooling Assembly Using Segmented Single-Phase Self-Transformers
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Solution Overview
Problem
Existing aircraft cooling systems with standard three-phase self-transformers are bulky, complex, and expensive to manufacture, with performance reproducibility issues.
Innovation Solution
A compact cooling assembly using three distinct single-phase self-transformers, each connected to the power supply network, which adapt and modify the voltage of alternating current to power a rotating electric machine, allowing for efficient conversion of three-phase current into single-phase currents, and including a rectifier and converter for direct current conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a standard three-phase self-transformer is used to transform electric current for the fan, then the transformation function is achieved, but the device becomes bulky and complex with difficult manufacturing and poor performance reproducibility
Solution Approach 1:
The patent divides the single three-phase self-transformer into three separate single-phase self-transformers. Each single-phase transformer has a simpler structure with fewer windings and a less complex magnetic circuit. This segmentation makes each transformer easier to manufacture with better performance reproducibility while collectively achieving the same three-phase current transformation function.
2Volume of moving object
If a standard three-phase self-transformer is used, then the transformation function is achieved, but the overall device size increases
Solution Approach 1:
By segmenting the transformer system into three independent single-phase units, each with its own core and windings, the patent reduces the overall complexity and volume. The three single-phase transformers can be arranged more compactly than a single three-phase transformer, and each individual transformer requires less magnetic material and winding space.
3Ease of manufacture
If a standard three-phase self-transformer is used, then the transformation function is achieved, but manufacturing costs increase
Solution Approach 1:
The patent segments the transformer into three simple single-phase units that can be manufactured using standard, well-established processes. This segmentation allows for easier automation of the winding process, simpler core assembly, and better quality control. The reduced complexity of each individual transformer leads to lower labor costs, less specialized equipment requirements, and improved manufacturing efficiency.
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 solution simplifies manufacturing, reduces costs, and improves reproducibility while providing a more compact and efficient cooling system with enhanced heat dissipation capabilities.
Implementation Method 1
each single-phase self-transformer being able to modify the voltage values of an input single-phase alternating current from the corresponding input terminal in order to obtain a modified output current
Implementation Method 2
including a rectifier and converter for direct current conversion
Implementation Method 3
a rotating electric machine comprising a rotary shaft and a fan wheel secured to the shaft
Data Source
AI summary
A cooling assembly (15) includes a conduit (16) including a side wall (17) and a fan (20) that includes a rotating electric machine (32), a power supply module (35) including three distinct single-phase self-transformers (79a, 79b, 79c), each single-phase self-transformer being magnetically decoupled from one another, each single-phase self-transformer (79a, 79b, 79c) surrounding the side wall (17) of the conduit.