Motor driver and cabinet

A motor driver, comprising:

• a housing having a top plate and a bottom plate, wherein the top plate includes
• an outer surface which includes two inclined surfaces extending from two opposite edges of the top plate to meet at an intersection line that is not in alignment with the edges,
• a horizontal inner surface opposite to the outer surface, and
• a through hole extending through the top plate from the inner surface to the outer surface;
• an electronic component disposed inside the housing, and configured to drive or control a motor;
• and
• a fan motor disposed below the top plate of the housing, attached to the horizontal inner surface of the top plate, and configured to cause air to pass from an opening in the bottom plate of the housing to the through hole in the top plate of the housing, wherein
• the intersection line of the two inclined surfaces is in a higher position than the two opposite edges of the top plate, the two opposite edges being away from the line of intersection,
• the fan motor is attached to the horizontal inner surface of the top plate at a position corresponding to the intersection line, so as to be adjacent to the through hole of the top plate,
• the horizontal inner surface of the top plate is flat, and
• the top plate has four straight edges, and each of the two opposite edges is one of said four straight edges.