MULTILEVEL CONVERTER AND METHOD OF CONTROLLING OPERATION OF MULTILEVEL CONVERTER Russian patent published in 2016 - IPC H02M3/335 H02M7/483 H02M7/523 

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering and can be used in modular multilevel converter, for example, for vehicles. Multilevel converter (1) comprises: active stage (2) for converting AC input voltage (u_in) at an AC input into an intermediate DC voltage (U_z); DC/DC converter (3) for transforming intermediate DC voltage (U_z) into output DC voltage (U_out) at DC output. DC/DC converter (3) has resonant transformer (32, 33), formed by resonant circuit (32) and transformer (33). Control unit (5) for converter (1) is configured to actively operate active stage (2) only based on output DC voltage (U_out) of DC/DC converter (3), input voltage (u_in) and input current of converter (1), and to operate DC/DC converter (3) in an open loop mode.

EFFECT: invention can be used in modular multilevel converter.

12 cl, 3 dwg