Winding structure of rotating electric machine
In a stator winding, series coils are connected in parallel. One series coil includes series-connected U phase coils that are wound oppositely in direction by turns in the order in which the coils are series-connected and that are arranged in the manner that one and the other coil sets of the U phase coils are separated in the circumferential direction of a stator core and are opposite to each other in the radial direction thereof. The other series coil includes series-connected U phase coils that are wound oppositely in direction by turns in the order in which the coils are series-connected and that are arranged in the manner that one and the other coil sets of the U phase coils are separated in the circumferential direction of the stator core and are opposite to each other in the radial direction thereof.
1. A winding structure of a rotating electric machine, comprising:
a core body having teeth; and
a winding portion wound around the teeth of said core body, wherein
said winding portion has a first coil group and a second coil group,
said first coil group and said second coil group are connected in parallel,
said first coil group includes a plurality of first coils connected in series,
said plurality of first coils are wound oppositely in direction by turns in the order in which said first coils are connected in series,
said plurality of first coils are grouped into at least a first coil set and a second coil set and spaced apart in the circumferential direction of said core body such that the first coil set and the second coil set are positioned opposite to each other in the radial direction of said core body in order to suppress the generation acyclic current in said first coil group and second coil group connected in parallel,
said first coil set and said second coil set each include at least two adjacent first coils from the plurality of first coils,
said second coil group includes a plurality of second coils connected in series,
said plurality of second coils are wound oppositely in direction by turns in the order in which said second coils are connected in series,
said plurality of second coils are grouped into at least a third coil set and a fourth coil set and spaced apart in the circumferential direction of said core body such that the third coil set and the fourth coil set are positioned opposite to each other in the radial direction of said core body in order to suppress the generation of cyclic current in said first coil group and second coil group connected in parallel, and
said third coil set and said fourth coil set each include at least two adjacent second coils from the plurality of second coils.
2. The winding structure of a rotating electric machine according to claim 1 , wherein
one coil set and the other coil set of said first coils are spaced apart from each other in the circumferential direction of said core body and are both adjacent to one coil set and the other coil set of said second coils spaced apart from each other in the circumferential direction of said core body.
3. The winding structure of a rotating electric machine according to claim 1 , including said winding portion of a plurality of phases formed with displacement therebetween in the circumferential direction of said core body.
4. The winding structure of a rotating electric machine according to claim 1 , wherein
said core body is a hollow cylinder in shape and has a plurality of said teeth arranged on inner peripheral surface of said core body in a circumferential direction of said core body,
said winding portion includes U phase coils, V phase coils and W phase coils,
said U phase coils are arranged as radially outermost coils,
said V phase coils are arranged on the inside of U phase coils and at a certain distance in said circumferential direction with respect to U phase coils, and
said W phase coils are arranged on the inside of V phase coils and at said certain distance in said circumferential direction with respect to V phase coils.
5. The winding structure of a rotating electric machine according to claim 1 , wherein
each of said plurality of first coils and said plurality of second coils is wound around a plurality of corresponding said teeth.
6. The winding structure of a rotating electric machine according to claim 1 , wherein
said core body is a hollow cylinder in shape and has a plurality of said teeth arranged on inner peripheral surface of said core body in a circumferential direction of said core body,
said winding portion includes U phase coils, V phase coils and W phase coils,
said U phase coils, said V phase coils and said W phase coils are each substantially in the shape of a circular arc,
said U phase coils are arranged as radially outermost coils,
said V phase coils are arranged on the inside of U phase coils and at a certain distance in said circumferential direction with respect to U phase coils,
said W phase coils are arranged on the inside of V phase coils and at said certain distance in said circumferential direction with respect to V phase coils,
each of said U phase coils, said V phase coils and said W phase coils is wound a predetermined number of times around a plurality of said teeth, and
each of said U phase coils, said V phase coils and said W phase coils is wound in the direction opposite to the direction in which an adjacent coil of the same phase is wound.
7. The winding structure of a rotating electric machine according to claim 1 , further comprising a rotor, wherein said rotor is disposed eccentrically with respect to said core body.
8. The winding structure of a rotating electric machine according to claim 1 , wherein any two adjacent coils of said plurality of first coils and said plurality of second coils are wound oppositely in direction by turns.
9. The winding structure of a rotating electric machine according to claim 1 , wherein any two coils of said plurality of first coils and said plurality of second coils positioned opposite to each other in the radial direction of said core body are wound in the same direction by turns.