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Design of a Tri-linked Symmetry IGCT Phase Module with Compact Structure

It designed a tri-linked structural symmetry IGCT phase module based on NPC three-level circuit with high density and high reliability. Its electrical design, press mounting design and water-cooling design are highly integrated within one unit. Variety of technical problems were overcome, such as multi-press mounting of plate semiconductor, high-voltage-low-inductance flexible busbar connection, high efficiency cooling pipe net distribution, etc. Commutation path of the module is symmetric and its stray inductance can be controlled within 120 n H. Experimental results show that output current of the phase module can be up to 2000A(rms) at DC 4 840 V and the capacity of single driving converter can be promoted to 11 MVA.