A New Three-Level Neutral-Point-Clamped Fifteen-Switch Inverter for Independent Control of Two Three-Phase Loads

A new topology of a three-level neutral-point-clamped fifteen-switch inverter (FSI) is proposed. The FSI topology consists of three legs, of which each consists of five switches and two diodes. An FSI can independently drive two three-phase loads. In addition, a new space-vector modulation (SVM) method suitable for the FSI to drive two three-phase loads is described in detail; moreover, the SVM method is suitable for both common-frequency and difference-frequency working modes of an FSI. The application on independent control of two three-phase loads for an FSI is verified well by the simulations and experiments.