Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
AC-DC power converting apparatus having sub-converters connected in series between main converter and AC power supply
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.
Mitsubishi Electric Corporation
H H Y H
H02M H02M Y02B H02M
inventional inventional additional inventional
Akihiko Junichiro Toshiyuki Masanori Osamu Yukimori
Iwata Ishikawa Fujii Yasue Mori Kishida