Frequency converter

[0001]FIG. 1 is a rear view of a frequency converter comprising a new, original and ornamental design;

[0002]FIG. 2 is a bottom view thereof;

[0003]FIG. 3 is a front view thereof;

[0004]FIG. 4 is a front, left side and top perspective view thereof;

[0005]FIG. 5 is a left side view thereof;

[0006]FIG. 6 is a right side view thereof; and

[0007]FIG. 7 is a top view thereof;

[0008]FIG. 8 is a rear view of frequency converter with internal components;

[0009]FIG. 9 is a bottom view thereof;

[0010]FIG. 10 is a front view thereof;

[0011]FIG. 11 is a front, left side and top perspective view thereof;

[0012]FIG. 12 is a left side view thereof;

[0013]FIG. 13 is a right side view thereof; and,

[0014]FIG. 14 is a top view thereof.