Patent ID: 7135793

Claim:
A stator coil of a stator core, comprising: a plurality of segment conductors for each of a plurality of phases; and a bus bar array board having bus bars which connect the segment conductors for each phase, wherein each segment conductor includes a pair of leg portions individually inserted into two slots of the stator core and one head portion continuously formed with said pair of leg portions and disposed at a head coil end of the stator core, the leg portions of said segment conductors of each phase are sequentially connected at a tail coil end of the stator core such that the segment conductors form a coil group for each slot, such that each coil group is composed of a plurality of partial coils formed of the corresponding segment conductors and such that a plurality of coil groups of the slots of each phase occupy a plurality of coil group layers defined so as to be disposed along a radial direction of the stator core, said bus bars of said bus bar array board are classified into a plurality of first crossover bus bars, a plurality of second crossover bus bars, a plurality of third crossover bus bars, and an electric insulating member, insulating the first, second and third crossover bus bars from one another, each of said first crossover bus bars is disposed to connect two end portions of two partial coils of the same coil group; each of said second crossover bus bars is disposed to connect two end portions of two partial coils of two different coil groups of the same coil group layer, and each of said third crossover bus bars is disposed to connect two end portions of two partial coils of two different coil groups of two different coil group layers of the same phase.