Aircraft Power Supply Paths for Fault Detection and Startup Feed
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Solution Overview
Problem
The existing power supply systems for aircraft, such as those described in WO 2021/089948 A1, face an increase in the number of components when trying to supply electric power to both the power generation device and the electric motor, leading to inefficiencies and potential reliability issues.
Innovation Solution
A power supply system with a first and second power transmission path, along with a fault detection circuit that applies voltage to the second power transmission path when disconnected from the load, allowing electric power to be supplied to the power generation device while reducing the overall number of components by eliminating the need for additional switching elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a switching element is provided in parallel with the diode to supply electric power to the power generation device, then electric power can be supplied to both the power generation device and the electric motor, but the number of components increases
Solution Approach 1:
The second power transmission path is designed to serve multiple functions: it can supply electric power to the power generation device when needed, and can also supply electric power to the load device when the first power transmission path is faulty. This multi-functionality eliminates the need for additional switching elements while maintaining power supply flexibility.
Solution Approach 2:
The fault detection circuit acts as an intermediary that automatically detects faults in the first power transmission path and redirects power flow through the second power transmission path. This intermediary mechanism enables seamless power supply redirection without requiring manual intervention or additional complex switching components.
2Adaptability or versatility
If a separate battery is provided for supplying electric power to the power generation device, then electric power can be supplied to the power generation device, but the number of components increases
Solution Approach 1:
The second power transmission path is designed to serve multiple functions: it can supply electric power to the power generation device when needed, and can also supply electric power to the load device when the first power transmission path is faulty. This multi-functionality eliminates the need for additional switching elements while maintaining power supply flexibility.
Solution Approach 2:
The fault detection circuit acts as an intermediary that automatically detects faults in the first power transmission path and redirects power flow through the second power transmission path. This intermediary mechanism enables seamless power supply redirection without requiring manual intervention or additional complex switching components.
3Reliability
If the first power transmission path is faulty, then power supply reliability is compromised, but adding redundant components increases device complexity
Solution Approach 1:
The fault detection circuit acts as an intermediary that automatically detects faults in the first power transmission path and redirects power flow through the second power transmission path. This intermediary mechanism enables seamless power supply redirection without requiring manual intervention or additional complex switching components.
Solution Approach 2:
The system proactively detects faults in the first power transmission path before they completely fail, and automatically switches to the second power transmission path in advance. This preliminary action ensures continuous power supply while avoiding the need for complex manual fault response systems.
Data Source
AI summary
In a power supply system of an aircraft, when electric power is supplied from a power generation unit to a drive unit, the electric power is supplied from the power generation unit to the drive unit via a first power transmission path, and a voltage is applied to a second power transmission path by a fault detection circuit in a state in which the power generation unit and the drive unit are disconnected from the second power transmission path, and when the power generation unit is started, electric power of the fault detection circuit is supplied to the power generation unit in a state in which the power generation unit is connected to the second power transmission path.