INTEGRATED COOLING CHANNELS FOR STATORS

Abstract

A cooling system includes cooling channels (30, 34a, 34b) integrated into the laminations (14) of a stator (10), the laminations (14) being stacked to form the stator core. The stator (10) has multiple stator slots (16) and multiple windings (18) extending through the stator slots (16). The geometry of the cooling channels (30, 34a, 34b) varies across different groups of the stator laminations (14). This allows the cooling channels (30, 34a, 34b) to be located closer to the primary heat source, which is the stator windings (18) positioned in the stator slots (16). The coolant enters the stator(10) geometry through one or more inlets on the outer surface of the electric motor, and the cooling channels (30, 34a, 34b) are shaped such that the coolant is distributed radially and axially at the same time.The coolant exits from both axial surfaces through one or more outlets (38a, 38b) from the cooling channels (30, 34a, 34b) and comes into contact with the winding heads (18).