18 pulse converter system optimized type of alternating current (AC) / direct current (DC), or the type of direct current (DC / AC)

摘要

A 18-pulse converter system operates without interphase transformer and neutral point on the DC side by providing three rectifier bridges across the DC terminals, one rectifier bridge being coupled with the AC terminals and the two other rectifier bridges being operated at + and -40 degrees phase shift, while the rectifier devices are controlled for 40-degree current conduction. IMAGE