Patent ID: 6121707
Filing Date: 2000-09-19
Classification: H02K

Abstract:
A stator for an electric motor, the stator comprising:a generally annular stator core having first and second axial ends and a plurality of circumferentially spaced elongated slots extending between the ends;a plurality of coils electrically interconnected to form groups of coils, each group including at least four coils, each coil including a plurality of windings forming a loop having a first side of a first length, a second side of a second length longer than the first length, and a pair of end portions extending between the first and second sides, the first and second sides of each coil being disposed in non-adjacent stator core slots, the second side of each coil crossing the end portions of another coil disposed in an adjacent stator core slot in locations axially exterior of the stator core ends, an end portion of each coil in each group being stacked axially outboard of and immediately adjacent to an end portion of another coil in the group, and first and last coils in each group being axially separated and electrically separated from one another at each end of the core by at least one interposed coil of the group, wherein sides of a pair of coils are disposed within each stator core slot and separated from one another by an insulating member and wherein within each stator core slot a first side of a first coil is disposed in a radially outer portion thereof and a second side of a second coil is disposed in a radially inner portion thereof.