FAILURE TOLERANT POWER ELECTRONIC CONVERTER SYSTEM

摘要

A drive device and method for controlling a rotating machine. The drive device includes plural inverters configured to transform first alternate currents (AC); DC links connected to the plural inverters and configured to transmit the DC currents; plural converters connected to the DC links and configured to transform the DC currents received from the DC links to second AC currents, where the plural converters are connected in series; semiconductor switches configured to switch the second AC currents and to sustain a short circuit during a failed mode, the semiconductor switches being provided inside the plural converters; and a controller connected to gates of the semiconductor switches and configured to switch on and off, when a semiconductor switch in a converter is in a failed mode, remaining semiconductor switches in the converter such that an AC current passes the converter.