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CAO Liang, LI Ge, WANG Haitian. A Design Model of Core Snubber for EAST NBI[J]. Plasma Science and Technology, 2011, 13(1): 115-120.
Citation: CAO Liang, LI Ge, WANG Haitian. A Design Model of Core Snubber for EAST NBI[J]. Plasma Science and Technology, 2011, 13(1): 115-120.

A Design Model of Core Snubber for EAST NBI

Funds: supported in part by Auxiliary Heating Project of EAST upgrade, in part by Ph. D foundation of State Education Ministry under contract #20060248012, PR. China.
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  • Corresponding author:

    CAO Liang, E-mail: riyue2358@gmail.com; MOB: 13774251370

  • A transformer type iron core snubber, as a protective device against the stray capacitance during the breakdown in EAST, is analyzed in detail. Three kinds of topology are presented. Then with the analysis for equivalent circuit, the ranges of three key parameters, i.e., secondary side resistance, leakage inductance and snubber inductance, are determined. By considering the saturation of the magnetic material, a design principle is also presented. A nearly 1:10 core snubber is tested. It is proved that a high permeability core with secondary resistor can restrain the discharge current effectively.
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