发明授权
US08576593B2 AC-DC power converting apparatus having sub-converters connected in series between main converter and AC power supply 有权
具有在主转换器和AC电源之间串联连接的副转换器的AC-DC电力转换装置

AC-DC power converting apparatus having sub-converters connected in series between main converter and AC power supply
摘要:
A power converting apparatus is configured with single-phase sub-converters (4) connected to AC input lines of individual phases of a three-phase main converter (3) in series therewith. In a control device (12) for performing output control of the power converting apparatus, a current command value calculating circuit (20) which adjusts a DC voltage command given to the main converter (3) so that DC voltages of the sub-converters (4) follow a command and generates AC current commands so that a DC voltage of the main converter (3) follows the DC voltage command is configured with a CPU, and AC currents are controlled by switching output voltage levels of the sub-converters (4) at an AC side thereof so that deviations of instantaneous AC current values from the AC current commands become smaller.
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