| 摘要 |
The power converter of the invention relates to a small-sized highly efficient power converter for generating an a.c. voltage output of multiple levels with less harmonic content. In the power converter, a d.c. voltage source (1) is separated into plural sections by series connected voltage dividing capacitors (3a, 3b, 3c) and multiple levels of a.c. output voltage are obtained from the divided d.c. voltage by on-off control of switching devices (2a, 2b, 2c). The power converter may have plural sets of the voltage dividing capacitors disposed separately adjacent to each switching devices, and series connection point (Oca, Ocb, Occ) of each set of the voltage dividing capacitors may be connected to division points (Osa, Osb, Osc) of the corresponding switching devices of each phase. The voltage dividing capacitors may be connected with each other at their series connection points. Thereby, the arrangement may make wiring length short and equal between the switching devices and the voltage dividing capacitors for each phase so as to reduce a loss in the snubber circuit, resultingly an a.c. voltage output (Ta, Tb, Tc) with less harmonic content is obtainable. <IMAGE> |
