Stacked multicell converter controlled by DSP

The paper presents an overview of some special power converters, called stacked multicell converters (SMC), with special attention being paid to their control strategy. An SMC is a converter that is used to control high voltages with conventional power semiconductors. This converter has a characteristic configuration composed of p columns and n stacks. It allows the voltage and current stresses on semiconductor components to be reduced and then high output voltages to be attained. The paper begins with a brief explanation of how an SMC works and its control complexity. A complete explanation of a SPWM control strategy by DSP in SMC is clearly given. Simulation and experimental results from a 100 V input voltage and 0.5 A output current prototype complement the work.