POWER CONVERSION DEVICE Russian patent published in 2015 - IPC H02P21/00 H02P27/08 H02M1/14 H02M7/5387 

FIELD: electricity.

SUBSTANCE: DC link (3) comprises a capacitor (3a) coupled in parallel to output of the converter (2) circuit and generates pulsating voltage (v_dc) of DC link. Inverter (4) circuit converts output of DC link (3) to AC by means of commutation and supplies AC to engine (7) coupled to it. Controller (5) controls commutation of inverter (4) circuit so that engine currents (i_u, i_v and i_w) pulse synchronically with pulsation of supply voltage (v_in). Controller (5) controls commutation of inverter (4) circuit in compliance with load of engine (7) or operating state of engine (7) and reduces pulsation amplitude of engine currents (i_u, i_v and i_w).

EFFECT: improved power factor and efficiency factor.

6 cl, 5 dwg