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Researchers develop device that supplies electricity wirelessly to trains
- Researchers develop device that supplies electricity wirelessly to trains
- 저작자 미상 (저작물 2267371 건)
This KTX bullet train is able to move as electricity is supplied through high-tension wires installed above the tracks.
What you see now is a next generation high speed train‚ called HEMU.
Unlike the KTX‚ it doesn't have a device that supplies electricity.
Instead‚ it receives electricity wirelessly through a device that is installed between the tracks.
Let's see how it works.
The wireless device receives 1-megawatt of electricity from a nearby inverter‚ which forms a high-frequency magnetic field of 60-kilohertz.
A power collector installed underneath the train absorbs this magnetic field‚ and converts in back into electricity‚ making the train move.
Although the technology is already used worldwide‚ Korea has become the first country to succeed in transferring this amount of electricity.
And as it does not require the installation of high-tension wires‚ it is safer and cuts down on maintenance costs.
Researchers say that when the technology is applied to high-speed trains‚ they will be able to travel faster than now.
"When the upper system of the train is removed‚ there is no speed resistance. This means that the train can raise its speed significantly. As there is no resistance‚ it also reduces energy consumption."
The Korea Railroad Research Institute plans to commercialize the technology starting next year.
Kim Min-ji‚ Arirang News. Reporter :
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