PROCEDIMENTO E SISTEMA DI ESERCIZIO DI UN ALIMENTATORE VARIABILEMULTIFASE, AD ESEMPIO PER MOTORI ELETTRICI A VELOCITA' VARIABILE.

摘要

A high output level is maintained in power supplies having multiple cells in each leg. Failed cells in any leg are bypassed to provide a current path through the respective leg. All of the unfailed cells are utilized while maintaining equal magnitude between phases and a balance phase relationship in the line-to-line output voltage. The invention may be utilized in conjunction with a peak voltage reduction circuit, and a by-pass switch.