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Hydrogen is commonly used in many industrial field. However, hydrogen should be filled in a high pressure container to use it.

Therefore, many researches have been conducted about an electrolyzer. The operating principle of the electrolyzer is that the

electrolyzer can separate water molecules into hydrogen and oxygen. To use the electrolyzer, a power conversion system is needed

because the current of the electrolyzer increases exponentially depending on the voltage of the electrolyzer. Thus, this paper 

proposes the power conversion system for the electrolyzer using a full-bridge DC-DC converter topology.