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The modulation strategy with the current invariance to input voltage disturbances and novel modulation algorithms for two-stage direct power converter are presented. Based on theoretical approach, the conditions for getting the current invariance are obtained. The novel modulation algorithms with minimum input current distortions are developed according to the proposed strategy. The switching sequence...
Recently the 3L-ANPC-VSC was introduced to overcome the unequal loss distribution and the resulting unsymmetrical semiconductor junction temperature distribution as main structural drawback of the 3L-NPC-VSC. This paper compares conventional 3L-NPC-VSCs with 3L-ANPC-VSCs using 3.3 kV, 4.5 kV, and 6.5 kV IGBT modules for industrial Medium Voltage Drives for rated converter output voltages of VLL =...
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