Aircraft Ground Power Generator Configuration
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Solution Overview
Problem
Existing electrical configurations for powering aircraft taxiing and cabin networks are either heavy and bulky due to high electrical power requirements or require additional weight and complexity to comply with certification standards, leading to inefficiencies in fuel consumption and harmonic pollution.
Innovation Solution
A novel electrical configuration using two generators driven by an auxiliary power unit, where one 'hybrid' generator can selectively power either network with different voltage levels, reducing overall electrical power and weight on board, and allowing the second generator to power the aircraft network independently, thus avoiding compliance with stringent certification standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two high-power generators are used to independently power the taxiing network and aircraft network, then network independence is achieved, but the system becomes heavy and bulky
Solution Approach 1:
The first generator is designed with multi-functionality to power either the taxiing network or the aircraft network selectively. Through selective connection/disconnection means, this single generator can serve multiple purposes, eliminating the need for two separate high-power generators while maintaining network independence when required.
Solution Approach 2:
The system employs dynamic switching capabilities where the first generator can be selectively connected to different networks based on operational requirements. This dynamic reconfiguration allows the system to adapt between powering the taxiing network, aircraft network, or both sequentially, reducing overall generator weight while maintaining flexibility.
2Weight of stationary object
If a common high-power generator powers both networks, then weight is reduced, but the taxiing network must comply with stringent certification standards increasing complexity
Solution Approach 1:
The system segments the power supply function by using the first generator exclusively for the taxiing network when needed, isolating it from aircraft network certification requirements. The second generator handles aircraft network power independently. This segmentation allows the taxiing network to operate without being constrained by aircraft network certification standards.
Solution Approach 2:
The selective connection/disconnection means act as intermediaries that isolate the taxiing network from the aircraft network electrical system. This intermediary mechanism allows the taxiing network to be powered by the first generator without exposing it to aircraft network certification constraints, while still enabling both networks to operate from the same generator when needed.
3Power
If an engine is run to power the taxiing network, then power availability is ensured, but fuel consumption increases significantly
Solution Approach 1:
The invention replaces the mechanical engine-based power system with an electrical power system. The first generator, driven by the APU, provides electrical power to the taxiing network through electric motors, eliminating the need to run a separate engine and significantly reducing fuel consumption while maintaining full power availability.
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 and volume of electrical power systems on aircraft, minimizes harmonic pollution, and allows for more efficient fuel consumption by optimizing generator usage and reducing the need for additional starters, while maintaining network independence.
Implementation Method 1
two electricity generators driven by an auxiliary power unit
Data Source
AI summary
An electrical power supply device for an aircraft on the ground, the device including two electricity generators driven by an auxiliary power unit, wherein the first generator is connected by a selective connection/disconnection mechanism to an aircraft network and to an electrical taxiing network, and is configured to deliver either a first AC voltage to the aircraft network when it is connected to that network, or an AC voltage or a power to the taxiing network when it is connected to that network, and wherein the second generator is connected by the connection/disconnection mechanism to the aircraft network to deliver the first AC voltage to that network solely when the first generator is powering the taxiing network.