| 摘要 |
Disclosed are an electric motor and a manufacturing method thereof. The electric motor comprises a case forming a receiving space therein; a stator received in the case; a rotor performing relative motion with respect to the stator; and a cooling path portion forming a path of a cooling fluid on an outer surface of the case, wherein the cooling path portion includes an outer rib projected toward the outer surface of the case and extended along a circumferential direction to form a receiving space of the cooling fluid therein; inner ribs projected from the outer surface of the case at an inner side of the outer rib, extended axially, and spaced apart from one another along a circumferential direction to form the path of the cooling fluid; and a cooling path cover arranged along a radius direction of the case to block the outsides of the outer rib and the inner rib to form the path of the cooling fluid together with the outer rib and the inner rib. In this case, a heat exchange area of the cooling fluid may be increased to raise cooling performance. |
