Free wheel diode arrangement for neutral point clamped electric power conversion apparatus
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United States of America Patent
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Jun 10, 1997
Grant Date -
N/A
app pub date -
Mar 10, 1995
filing date -
Mar 10, 1994
priority date (Note) -
Expired
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Abstract
The invention is directed to a neutral point clamped electric power conversion apparatus having four semiconductor switching elements connected in series. The capacity of outer free wheel diodes connected in reverse parallel with outer semiconductor switching elements are increased compared to that of inner free wheel diodes, thereby minimizing, an imbalance in losses between the inner and the outer free wheel diodes.
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