The ornamental design for a rotorcoreplate for an electric motor, as shown and described.
FIG. 1 is a perspective view of a rotor core plate showing our new design;
FIG. 2 is an enlarged view of part of FIG. 1 surrounded by a two-dash chain line;
FIG. 3 is a front elevational view of FIG. 1;
FIG. 4 is an enlarged view of part of FIG. 3 surrounded by a two-dash chain line;
FIG. 5 is a rear elevational view of FIG. 3;
FIG. 6 is a left side view of FIG. 3; the right side view being a mirror image thereof;
FIG. 7 is a top plan view of FIG. 3; the bottom plan view being a mirror image thereof; and,
FIG. 8 is a cross-sectional view of FIG. 3 taken along the 8-8′ line.
The evenly spaced broken lines show environment and form no part of the claimed design and the two-dash chain lines depict the extent of the enlarged views and form no part of the claimed design.