Mixed-phase winding, stator, and motor
Disclosed is a mixed-phase winding, comprising at least one branch, where each branch is composed of at least one coil ring; the coil ring comprises a set of lap winding coils and a set of combined conductors; each set of lap winding coils comprises P lap winding coils evenly distributed in the circumferential direction, and each set of combined conductors comprises P combined conductors evenly distributed in the circumferential direction, P being the number of pole pairs; and the lap winding coils and the combined conductors are arranged at intervals in a staggered manner in the circumferential direction and sequentially connected in series; each lap winding coil and each combined conductor each comprises a hairpin conductor or at least two hairpin conductors arranged side by side in the thickness direction; each hairpin conductor comprises a hairpin body integrally bent in a U shape.
1. A mixed-phase winding, comprising at least one branch,
wherein each branch comprises at least one coil ring, the coil ring comprises a set of lap winding coils and a set of combined conductors, each set of lap winding coils comprises P lap winding coils evenly distributed in a circumferential direction, and each set of combined conductors comprises P combined conductors evenly distributed in the circumferential direction, P is the number of pole pairs, and the lap winding coils and the combined conductors are spaced apart in a staggered manner in the circumferential direction and are connected in series sequentially;
each of the lap winding coil and the combined conductor comprises one hairpin conductor or at least two hairpin conductors arranged side by side in a thickness direction, the hairpin conductor comprises a hairpin body which as a whole is bent into a U-shape, the hairpin body comprises two support leg parts arranged in parallel and a head part connected to one end of the two support leg parts, and the two support leg parts are each provided with a support foot at another end;
wherein the lap winding coil comprises two hairpin conductors, which respectively are first-type skewed U-shaped conductor and second-type skewed U-shaped conductor, respectively; the first-type skewed U-shaped conductor and the second-type skewed U-shaped conductor are arranged side by side in a thickness direction of the hairpin body, a support foot on one support leg part of the first-type skewed U-shaped conductor and a support foot on another support leg part of the second-type skewed U-shaped conductor are skewed and bent away from each other in the width direction of the hairpin body, and another two support feet of the first-type skewed U-shaped conductor and the second-type skewed U-shaped conductor are bent toward each other in the width direction of the hairpin body and are connected with each other to form the lap winding coil; the hairpin conductor of the combined conductor is an integrally annular O-shaped conductor, two support feet of the O-shaped conductor are skewed and bent toward a middle part in the width direction of the hairpin body, and are spaced apart in a staggered manner in the thickness direction of the hairpin body.
2. The mixed-phase winding according to claim 1 , wherein in each branch, the support leg parts, where support feet for connecting a power supply lead-out conductor and a star point are located, are respectively located on an outermost layer and a secondly-outermost layer, or respectively located on the secondly-outermost layer and the outermost layer of respective slots, where the support leg parts are located, in an assembly state.
3. The mixed-phase winding according to claim 1 , wherein each branch is formed by connecting two coil rings, one phase winding comprises two sets of coil rings, each set of coil rings comprises Q coil rings located in consecutive adjacent Q slots in the circumferential direction of the stator in an assembly state, and Q is the number of slots per pole and phase and is an integer greater than 1; in a clockwise or counterclockwise direction, a coil ring located in an Ath slot in one set of coil rings is connected in series with another coil ring located in a (Q+1−A) th slot in another set of coil rings to form a branch.
4. The mixed-phase winding according to claim 1 , comprising one branch, wherein the branch comprises two sets of coil rings connected in series, each set of coil rings comprises Q coil rings located in consecutive adjacent Q slots in the circumferential direction of the stator in an assembly state, and Q is the number of slots per pole and phase and is an integer greater than 1; in a same set of coil rings, two coil rings located in adjacent slots are connected to each other, and a pitch of the hairpin conductor on a last single coil of a former coil ring in a clockwise or counterclockwise direction is Y+1, the support foot, located at an end of the hairpin conductor with the pitch of Y+1, and the support foot connected therewith of a latter coil ring are arranged side by side in a radial direction of the phase winding, and a pitch of the hairpin conductor on a last single coil of a last coil ring in the clockwise or counterclockwise direction is Y−Q+1, and a pitch of all other hairpin conductors is Y.
5. The mixed-phase winding according to claim 3 , wherein in the clockwise or counterclockwise direction, in the branch located in the Ath slot in the assembly state, in the two coil rings connected in series, a pitch of a last hairpin conductor on a former coil ring is Y+Q−2A+1, a pitch of a last hairpin conductor on a latter coil ring is Y−Q+2A−1, and a pitch of all other hairpin conductors is Y; or, in the clockwise or counterclockwise direction, in the branch located in the Ath slot in the assembly state, in the two coil rings connected in series, a pitch of a first hairpin conductor on the former coil ring is Y+Q−2A+1, a pitch of a first hairpin conductor on the latter coil ring is Y−Q+2A−1, and a pitch of all other hairpin conductors is Y.
6. The mixed-phase winding according to claim 1 , wherein the lap winding coil further comprises the O-shaped conductor, the O-shaped conductor and the second-type skewed U-shaped conductor are stacked in a thickness direction of the first-type skewed U-shaped conductor, and two support feet of the O-shaped conductor are respectively connected to other adjacent support feet in the thickness direction.
7. The mixed-phase winding according to claim 1 , wherein the hairpin conductor of the lap winding coil is an integrally annular O-shaped conductor, two support feet of the O-shaped conductor are skewed and bent toward the middle part in a width direction of the hairpin body, and are spaced apart in a staggered manner in a thickness direction of the hairpin body; the combined conductor comprises one hairpin conductor, which is a wave-like conductor with two support feet skewed and bent away from each other in the width direction of the hairpin body.
8. The mixed-phase winding according to claim 1 , wherein support leg parts, where a pair of support feet connected to each other between the lap winding coil and the combined conductors are located, are respectively located in a secondly-outermost layer and an outermost layer, or located in the outermost layer and the secondly-outermost layer of respective slots, where the support leg parts are located, during assembly.
9. The mixed-phase winding according to claim 1 , wherein at least one hairpin conductor in the branch is two single foot conductors correspondingly arranged at a position where the support leg parts of the hairpin conductor is located, one end of the single foot conductor is a support foot, and the support foot is consistent with the support foot of the hairpin conductor at a corresponding position, and another end of the single foot conductor is a connecting end.
10. A stator, comprising a stator iron core and a plurality of circuits of the mixed-phase windings according to claim 1 mounted on the stator iron core, wherein connecting ends of the plurality of circuits of the mixed-phase windings for connecting a power supply lead-out conductor are respectively connected with power supply lead-out conductor terminals, and connecting ends of the plurality of circuits of the mixed-phase windings for connecting a star point are welded by a star point connecting conductor.
11. A motor, comprising the stator according to claim 10 .