Single Rotor Dual Stator Electric Machine for Aircraft Engine
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Solution Overview
Problem
Modern aircraft require increased electrical power for avionic and entertainment systems, necessitating improved designs for dual redundant electrical systems using electric machines to replace pneumatic and hydraulic power systems, focusing on reliability and weight/cost effectiveness.
Innovation Solution
A dual channel electric machine system with a single rotor and dual stators, coupled with a dual channel motor drive unit and full authority digital engine control (FADEC), which operates both an oil delivery system and a fuel delivery system, allowing for efficient and redundant power generation and distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a single rotor dual stator electric machine configuration is used, then weight is reduced and device complexity is decreased, but reliability may be compromised due to shared mechanical components
Solution Approach 1:
The patent combines two electric machine channels into a single rotor dual stator configuration, merging previously separate mechanical components into one integrated unit. This reduces overall weight and device complexity while maintaining dual-channel electrical redundancy through independent stator windings and control systems
Solution Approach 2:
The patent segments the electrical system into two independent channels with separate stator windings and control circuits, while sharing the mechanical rotor. This allows electrical redundancy to be maintained through independent electrical paths while achieving mechanical weight reduction through component sharing
2Reliability
If dual redundant electrical systems are implemented, then reliability is improved, but weight and cost increase
Solution Approach 1:
The patent merges two separate electric machine systems into one integrated rotor with dual stators, combining previously duplicate mechanical components into a single shared structure. This eliminates redundant mechanical weight while preserving electrical redundancy through independent stator channels and control systems
3Reliability
If separate electric machines are used for each channel, then reliability is improved through redundancy, but device complexity and cost increase
Solution Approach 1:
The patent merges two separate electric machine systems into one integrated rotor with dual stators, combining previously duplicate mechanical components into a single shared structure. This eliminates redundant mechanical weight while preserving electrical redundancy through independent stator channels and control systems
Solution Approach 2:
The single rotor serves multiple functions by supporting both stator channels simultaneously, acting as a universal mechanical component for both electrical channels. This multi-functionality reduces the number of separate components needed while maintaining the redundancy benefits of dual-channel operation
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 enhances reliability, reduces weight, and eliminates single-point failures by providing redundant power to engine accessories, ensuring continuous operation and minimizing the risk of in-flight shutdowns or engine starting failures.
Implementation Method 1
an electric machine having a single rotor coupled to a dual channel stator comprising a first stator and a second stator, for operating as a motor to generate motive power
Data Source
AI summary
There is described an oil and fuel control system and method for an engine. The system comprises an electric machine having a single rotor coupled to a dual channel stator comprising a first stator and a second stator, for operating as a motor to generate motive power; a dual channel motor drive unit coupled to the electric machine; a dual channel full authority digital engine control (FADEC) coupled to the dual channel motor drive unit; an oil delivery system comprising an oil pump and oil accessories, coupled to the single rotor of the electric machine; and a fuel delivery system comprising a fuel pump and fuel accessories, coupled to the single rotor of the electric machine.