FIELD: current conversion equipment. SUBSTANCE: frequency doubler with multiphase input includes phase 1 and line 2 single-phase bridge rectifiers connected with inputs to proper terminals of three-phase network with zero and with outputs to input of summing unit through threshold units each composed of stabilizer diode 6, resistors 7 and controlled key element 5. Summing unit is manufactured in the form of multiphase electromagnetic system with core 3 and primary winding 4 in each phase. EFFECT: high reliability of doubler. 3 dwg
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