Abstract: Systems and methods additively manufacturing an object by applying heat to a first plurality of metallic particles in a powder bed using a first heat source, wherein the first heat source is one of multiple heat sources configured into an array, and the first heat source generates a first melt pool. Heat is simultaneously applied to a second plurality of metallic particles in the powder bed using a second heat source of the multiple heat sources in the array to generate a second melt pool. The first plurality of metallic particles are separated from the second plurality of metallic particles by a distance, wherein the distance and an amount of heat from each heat source is controlled to generate a combined melt pool that is larger in size and encompasses the first and second melt pools. The combined melt pool is allowed to solidify to form the object.

Abstract: Systems and methods additively manufacturing an object by applying heat to a first plurality of metallic particles in a powder bed using a first heat source, wherein the first heat source is one of multiple heat sources configured into an array, and the first heat source generates a first melt pool. Heat is simultaneously applied to a second plurality of metallic particles in the powder bed using a second heat source of the multiple heat sources in the array to generate a second melt pool. The first plurality of metallic particles are separated from the second plurality of metallic particles by a distance, wherein the distance and an amount of heat from each heat source is controlled to generate a combined melt pool that is larger in size and encompasses the first and second melt pools. The combined melt pool is allowed to solidify to form the object.

Abstract: A device and method for substantially enhancing the cooling of electric machines, e.g., motors and generators, is described. A hermetically-sealed chamber surrounds electric wire winding end-turns at either end of the stator core, and contains at least one phase-change coolant. The coolant removes heat from the stator winding through the end-turns, where often temperatures are the greatest, through cyclical ebullition, whereby heat generated by the stator winding end-turns boils and, subsequently, vaporizes the liquid coolant. The hot, vaporized coolant is removed through at least one vapor return passage and collects, cools, and condenses on the stator cooling jacket, which removes heat from the vaporized coolant. The liquid condensate precipitates into a wicking matrix, which continuously returns the liquid condensate through capillarity to the liquid coolant pool that partially wets the wicking matrix and winding end-turns.