Parallel Fuel Cell Power Lines for Rotor Short-Circuit Isolation
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Solution Overview
Problem
Conventional power supply systems for air mobility fail to maintain stable power delivery when a short circuit occurs in semiconductor switching elements of a fuel cell converter, posing safety risks during flight.
Innovation Solution
A power supply device with parallel power supply lines, each matched one-to-one with rotor structures, and equipped with fuses and semiconductor switching elements to isolate faulty lines, ensuring power is maintained to other rotor structures during a short circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a plurality of rotor structures are collectively connected to the output terminal of a fuel cell converter, then the device complexity is reduced, but the reliability deteriorates because a short circuit in any semiconductor switching element cuts off power supply to all rotor structures
Solution Approach 1:
The patent divides the power supply system into multiple independent parallel lines, where each line independently connects one or more semiconductor switching elements to one or more rotor structures. This segmentation ensures that a short circuit in one line does not affect other lines, thereby improving reliability while maintaining manageable device complexity through modular architecture.
2Reliability
If fuses are added to isolate faulty semiconductor switching elements, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The patent introduces fuses as intermediary protective elements in each parallel power supply line. These fuses act as mediators that automatically isolate faulty semiconductor switching elements from the rest of the system when a short circuit occurs, thereby improving reliability while adding only minimal complexity through simple protective components rather than complex control systems.
Data Source
AI summary
Disclosed are a power supply device for air mobility and a method thereof. The power supply device includes a plurality of power supply lines that distribute power of a fuel cell stack in parallel, one-to-one matches the plurality of power supply lines with a plurality of rotor structures. The power supply device supplies power to one rotor structure through one power supply line, thereby supplying power to the remaining rotor structures through the remaining power supply lines even when a short circuit occurs in a semiconductor switching element on any one of the plurality of power supply lines.