Abstract: Disclosed is a direct slot cooling system for motors, including a stator configured to expand an inner slot space of a stator core where a coil is wound to form a cooling slot through which a cooling fluid passes; a rotor coupled to a center of the stator to rotate; and a housing coupled to left and right sides of the stator to form a cooling jacket in watertight communication with a cooling slot so that a cooling fluid circulates in the cooling jacket.

Abstract: A device for preventing ingress of floating matters on the free surfaces of a ladle and a tundish, each having a discharge port, during a continuous casting process according to an embodiment of the present invention is configured for installation at the discharge ports of the ladle and the tundish, and comprises: a disc-shaped plate; and a support part installed at the plate and configured to support the plate on a surface around each of the discharge ports of the ladle and the tundish, wherein each of the ratio of the radius of the discharge port of the ladle to the width of the plate and the ratio of the radius of the discharge port of the tundish to the width of the plate has a value equal to or greater than 1.