Patent ID: 7268455

Claim:
A 4-layer sequential segment connection stator winding for a stator of a rotary electric machine, said stator winding formed of a plurality of phase windings each comprising an even number of identical-phase partial coils each of which is a 1-turn coil formed of a plurality of U-shaped large segments and a plurality of U-shaped small segments, each said large segment having two legs that are disposed as first and fourth conductor layers respectively within a predetermined pair of slots of said stator that are circumferentially separated by one pole pitch of said rotary electric machine, with leg ends corresponding to said first and fourth conductor layers protruding from said slots, and each said small segment having two legs that are disposed as second and third conductor layers respectively within a predetermined pair of slots of said stator that are circumferentially separated by said one pole pitch, with leg ends corresponding to said second and third conductor layers protruding from said stator slots; wherein: each mutually adjacent pair of leg ends corresponding to said first and second conductor layers are connected to be at an identical potential and are bent in an identical direction for being joined to leg ends of other segments; and a pair of said partial coils comprise a first partial coil formed as a 1-turn wave-wound coil comprising, within each of respective predetermined ones of said stator slots, a mutually adjacent pair of said first, second, third and fourth conductor layers, and a second partial coil formed as a 1-turn coil comprising, within said each predetermined stator slot, a remaining mutually adjacent pair of said conductor layers.