| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power converter quickly selecting a spatial vector voltage required to output a three-phase balanced voltage even if a spatial vector voltage of an instantaneous spatial vector is high. <P>SOLUTION: A multiplex transformer 12 is configured to multiplex a plurality of three-phase converters 11a, 11b and 11c for outputting a plurality of spatial vector voltages in series to output the three-phase voltage to a power system 13. A controller 14 selects a spatial vector voltage from the instantaneous spatial vector formed by the plurality of spatial vector voltages so as to satisfy a command value Vr of the output voltage obtained by tracking a round locus indicating a balanced three-phase voltage, and controls the output voltage of the multiplex transformer 12. In this case, the controller 14 forms an annular bandwidth with the upper and lower limit values set on the instantaneous spatial vector for the command value Vr of the output voltage, selects a spatial vector voltage within the bandwidth, and controls the selected spatial vector voltage as an output voltage of the multiplex transformer 12. <P>COPYRIGHT: (C)2010,JPO&INPIT |
