FIELD: electricity.
SUBSTANCE: invention relates to electrical engineering and power electronics and can be used during designing high quality three-phase alternating voltage generating systems with frequency of 50 Hz in self-contained units. At DFC input shall be supplied three three-phase systems of special type voltages based on voltage pulsations from two generators with different frequencies or amplitude-modulated by sinusoidal law. For this purpose, it is proposed to make each group of power elements in form of one set of six two-way switches on IGBT-transistors, connected in pairs opposite to each of six branches, each group inlet includes filter, three input voltage transducers, at output are current sensor and output voltage sensor, control system has five inputs and twelve outputs, wherein outputs of voltage and current sensors are connected to control system inputs, and control system outputs are connected to corresponding bidirectional switches control terminals.
EFFECT: obtaining at DFC output of three-phase voltage with shape maximally close to sinusoidal, as well as providing system operation for asymmetrical load with wide range of power factor values (both of inductive and capacitive nature).
1 cl, 5 dwg
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