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In this paper, voltage and current waveforms were measured in order to analysis arc characteristics of low voltage wires used for indoor wiring of railway station. The simulated arc generator was made by UL 1699 and arc was simulated to series arc. And analyzed statistical distributions of the current and voltage waveforms for the source was used to analysis series arc source. Results of analysis...
This paper proposes two different types of core shape analysis for contactless transformer, which can be used for delivering high-power to traction in new railway systems. This type of railway system without catenary can save construction cost and maintenance costs. The major problem of contactless transformer is the air gap between the primary side and secondary side, which affects the power delivery...
This paper presents contactless power supply systems using Valtchev model in transportation systems. The major drawback of contactless systems is that the efficiency is lower than that of contact systems. The coupling coefficient of the contactless transformer is the most influent parameter on the system efficiency. Here, a new computer model for the contactless transfer system developed in the Korea...
In order to check the electric field distribution of polymer line post insulator, we performed electric field simulation according to state of water droplets. Water droplets use sea water contaminant. The water droplets may appear in different forms and sizes, therefore the form is defined by the angle shape between the surface of the water droplet. The water droplet may measure from less than 90...
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