A POWER CONVERTER WITH STAR CONFIGURED MODULES

摘要

A power converter consisting of converter modules (13, 14, 15) is connected in a star configuration. The inputs of the converter modules are connected to AC input terminals (10, 11, 12) and the outputs to DC output terminals (17). A second star network (18, 19, 20) is connected in parallel to the star connected converter modules. A DC output sensing means (39) monitors the output voltage across the DC output terminals (17) and produces a demand signal based on a comparison with a required value. A feedback network (27-35) monitors the voltage difference between the nodes S and N of the two star configurations and produces a signal for each phase corresponding to the voltage difference. A control network (36-43) adds the outputs of the feedback means and the demand signal and produces a control signal for each phase which is used to control each corresponding converter.