The use of voltage-source active rectifier to minimize the effect of supply voltage drops on converters

The paper presents the possibilities of the use of voltage-source active rectifiers to minimize the effect of voltage drops on the DC link voltage magnitude of frequency converters. The control of voltage-source active rectifiers can compensate the short-term voltage drops within a certain range. The paper describes principle of the operating of voltage-source active rectifiers and the range of the voltage drops that can be compensated. The paper points out that it is important to observe the load current and the DC link voltage of converters.