Annular Fairing Power Circuit Layout for Cooling Aircraft Thrusters
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Solution Overview
Problem
Existing electric thrusters for aircraft face challenges in integrating power electronics due to overheating issues, particularly when high switching frequencies are used, leading to potential failure of power components.
Innovation Solution
The power electronics circuits are arranged in an annular manner within an annular part integral with the thruster fairing, surrounding the propeller, which enhances cooling by increasing the heat exchange surface and allows for a more compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If power electronics are mounted on the surface of the electric motor housing, then the manufacturing process is simple, but the heat exchange surface is limited causing overheating
Solution Approach 1:
The power electronics are relocated from the motor housing surface to an annular part surrounding the propeller, effectively moving the component layout to a different spatial dimension. This annular configuration provides a larger surface area for heat dissipation while maintaining manufacturing feasibility through integral construction with the fairing.
Solution Approach 2:
The power electronics are integrated within the annular part that surrounds the propeller, creating a nested arrangement where the power electronics are housed within the structural framework of the thruster itself. This nesting approach maximizes space utilization and heat exchange surface area.
2Volume of stationary object
If power electronics are mounted at one axial end of the electric motor, then space requirements are reduced, but the heat exchange surface remains insufficient
Solution Approach 1:
Instead of concentrating power electronics at a single axial location, the invention distributes them in an annular configuration around the propeller. This dimensional redistribution maintains compact overall volume while dramatically increasing the heat exchange surface area through the annular geometry.
3Productivity
If high switching frequencies are used in power electronics, then power conversion efficiency is improved, but overheating and component failure risk increase
Solution Approach 1:
The invention converts the harmful heat generated by high-frequency switching into a manageable thermal challenge by providing an optimized heat exchange pathway. The annular part's increased surface area and integration with the fairing create effective thermal management that enables high-frequency operation without compromising component reliability.
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 improves the cooling of power components, reduces space requirements, and prevents overheating, thereby ensuring the reliable operation of the electric thruster.
Implementation Method 1
the cooling of said power components is improved since the heat exchange surface is increased compared to the previous technique
Data Source
AI summary
An aircraft thruster includes at least a first propeller provided with a plurality of radial blades extending about an axis of rotation of the said first propeller, which is driven in rotation by a first electric motor. An electrical supply of the first electric motor includes power circuits carried by a fairing of the thruster characterized in that the power circuits are arranged in an annular manner in an annular part integral with the fairing of the thruster, this annular part being arranged around the said first propeller.