The ornamental design for an electric powerconverter, as shown and described.
FIG. 1 is a perspective view of an electric power converter showing the new design:
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left -side elevation view thereof;
FIG. 5 is a right -side elevation view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a perspective view thereof, shown in an environment of use; and,
FIG. 9 is an enlarged cross sectional view thereof, taken along line 9-9 of FIG. 2.
In the drawings, the broken lines represent parts of the article, environmental subject matter, as well as the designation of an enlarged cross sectional view. None of the broken lines form part of the claimed design.