A multi-active bridge power electronic transformer and its soft start method
A technology of power electronics and transformers, applied in the direction of adjusting electrical variables, instruments, electrical components, etc., can solve the problems of current inrush, complicated current limiting, excessive capacitor current, etc., to avoid system inrush current, ensure continuity, and control methods simple effect
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[0021] Below in conjunction with accompanying drawing, the present invention is described in further detail:
[0022] consider figure 1 The multi-active-bridge power electronic transformer topology shown. The main body of the transformer includes: a three-winding transformer and an inductor L connected in series between the transformer and the H-bridge 1 , L 2 , L 3 ; Three groups of H bridges (switch tube S 1 to S 12 ) and port regulator capacitor C 1 、C 2 、C 3 . The three windings are respectively connected in series with a group of H-bridges through inductors, and the output ports of each H-bridge are respectively connected in parallel with a port voltage stabilizing capacitor.
[0023] The numbers of the three H-bridge output ports are respectively #1 to #3, among which: port #1 is called high voltage port, rated voltage is 750V, rated power is 20kW; port #2 is called medium voltage port, rated voltage is 650V, rated Power 10kW; port #3 is called low voltage port...
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