Train Auxiliary Power Switching for Generator Failure Backup
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Solution Overview
Problem
Current train power generation systems require each onboard generator to have doubled power output capacity to account for potential failures, leading to increased manufacturing costs and complexity due to the need for larger and heavier generators.
Innovation Solution
A power distribution system with multiple auxiliary generators and switching devices across connected train cars, allowing power to be rerouted from functioning generators to faulty ones, thus enabling efficient load distribution without the need for oversized generators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each power generator is designed with doubled power output capability to supply loads during generator failure, then reliability is improved, but device complexity and manufacturing costs increase
Solution Approach 1:
The power distribution system is segmented into multiple independent zones, each served by its own power generator. Switching devices are placed at intermediate points between generators to enable selective isolation and rerouting. This segmentation allows each generator to be sized for its local load rather than requiring doubled capacity, reducing generator complexity while maintaining system reliability through alternative power paths.
2Reliability
If each power generator is designed with doubled power output capability to supply loads during generator failure, then reliability is improved, but weight increases
Solution Approach 1:
The train is divided into power distribution zones with switching devices positioned at intermediate cars. When a generator fails, the switching devices reroute power from adjacent generators through the power distribution line, eliminating the need for each generator to carry doubled capacity and reducing overall generator weight.
Solution Approach 2:
The power distribution line acts as an intermediary that enables power transfer between generators. Switching devices positioned at intermediate points serve as mediators to isolate faulty generators and redirect power flow, allowing generators to be lighter while maintaining reliability through the intermediary power distribution network.
3Reliability
If each power generator is designed with doubled power output capability to supply loads during generator failure, then reliability is improved, but manufacturing costs increase
Solution Approach 1:
The power distribution system is divided into segments with switching devices at intermediate points. This segmentation allows each generator to be manufactured with standard capacity rather than doubled capacity, reducing manufacturing costs. The switching devices enable reliable power rerouting, compensating for the reduced individual generator capacity through system-level redundancy rather than component-level oversizing.
Data Source
AI summary
A system for distributing auxiliary power onboard of a train including a first car, a second car, and a third car equipped each with electric loads, including: a power distribution line extending across the cars; a first, a second and a third auxiliary power generators each configured to supply power to the electric loads on the first, second and third cars, respectively; a first and a second auxiliary power switching devices positioned along the power distribution line between the first and second auxiliary power generators and between the second and third power generators, respectively; a third and a fourth auxiliary power switching devices positioned along the power distribution line at the second car. When one of the auxiliary power generators is faulty, loads installed on the car affected by the faulty generator are supplied by one of the other auxiliary power generators via switching of the power switching devices.