Chikaraishi Hirotaka

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The helical type fusion facility uses a huge superconducting dc magnet. To keep the coil current of the magnet, a high output current but extra low voltage power supply is necessary. This paper introduces a conceptual design of a dc power supply that using a mechanical conductor as switching devices.
For a SMES to protect the whole facility from momentaly voltage drop, a helium free superconducting pulse coil using conduction cooling is developed. Also short time power converters and a high-speed voltage drop detector for a 1 MJ class SMES are designed. To confirm the design of components, a 100 kJ class demo system is constricted tested. After that the(More)
To protect a facility from momentary voltage drop, we are studying a short time SMES system. For this SMES, a helium free superconducting pulse coil using conduction cooling is developed. Also short time power converters and a high-speed voltage drop detector for a 1 MJ class SMES are designed. To confirm the design of components, a 100 kJ class demo coil(More)
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