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CN-122001130-A - Double short-distance stator winding, motor stator and motor

CN122001130ACN 122001130 ACN122001130 ACN 122001130ACN-122001130-A

Abstract

The invention discloses a double short-distance stator winding, a motor stator and a motor, wherein the double short-distance stator winding is wound in iron core slots of a stator core, the number of layers of the iron core slots of the stator core is n, the number of slots of each phase of each pole is m, the number of pole pairs is p, the number of slots is s, the pole distance is tau, m=s/(2p×3), tau=s/2 p, the phase winding on the stator core comprises a plurality of winding units, the winding units comprise a plurality of winding cycles, the winding cycles comprise x interlayer span tau-1 coils, 1 same-layer span tau coil and x interlayer span tau-1 coils which are sequentially connected, the winding cycles are sequentially connected through the same-layer span tau-1 coils, and x= (n-2)/2 if the number of layers n is even, and x= (n-1)/2 if the number of layers n is odd. The winding structure of the coil with a short distance is used for reducing the copper consumption of the stator winding and reducing the resistance and copper loss.

Inventors

  • Hou Jinchi
  • LUO HANJUN
  • QU HAO

Assignees

  • 东风汽车有限公司东风日产乘用车公司

Dates

Publication Date
20260508
Application Date
20260107

Claims (11)

  1. 1. The double short-distance stator winding is wound in iron core slots of a stator core and is characterized in that the number of layers of the iron core slots of the stator core is n, the number of slots per pole per phase is m, the number of pole pairs is p, the number of slots is s, and the pole pitch is tau, wherein m=s/(2p×3), and tau=s/2 p; The phase winding on the stator core comprises a plurality of winding units, the winding units comprise a plurality of winding cycles, the winding cycles comprise x interlayer span tau-1 coils, 1 same-layer span tau coil and x interlayer span tau-1 coils which are sequentially connected, and the winding cycles are sequentially connected through the same-layer span tau-1 coils; if the number of layers n is even, x= (n-2)/2, if the number of layers n is odd, x= (n-1)/2.
  2. 2. The double short-distance stator winding according to claim 1, wherein the number m of slots per phase of each pole of the stator core is 3, the number n of layers of slots of the core is an odd number of two, the pole pitch τ is 9, the double short-distance stator winding comprises three-phase windings, each phase of the phase windings is uniformly arranged in the circumferential direction of the stator core, and the three phases of the phase windings are sequentially arranged adjacently; Each phase of phase winding comprises at least three groups of winding units, the winding units are uniformly arranged for a circle along the circumferential direction of the stator core, each winding unit comprises two identical-layer span 8 coils and three winding cycles, the first winding cycle is connected between an electric inlet end and the identical-layer span 8 coils, the second winding cycle is respectively connected between one identical-layer span 8 coil and the other identical-layer span 8 coil, the third winding cycle is connected between the identical-layer span 8 coils and a neutral point, and the two winding cycles are adjacently arranged; the same-layer span 8 coil is reversely wound along the first layer of the stator core and is connected with the next winding unit connection or neutral point.
  3. 3. The double short-pitch stator winding of claim 2, wherein the winding cycle comprises at least two interlayer span 8 coils and one same layer span 9 coil, the same layer span 9 coil being wound forward along the end of the stator core, wherein half of the interlayer span 8 coils are sequentially wound forward from two layers of the stator core to the end of the same layer span 9 coil after being connected to the power feeding end or the same layer span 8 coils, and the other half of the interlayer span 8 coils are wound backward from the last second layer of the core slots with six forward intervals of the same layer span 9 coils after being connected to the same layer span 8 coils or the next winding unit.
  4. 4. A double short-distance stator winding according to claim 3, wherein the coil ends on the opposite sides of the winding unit to the feeding and discharging directions are welded ends, and the coil ends on the same sides of the winding unit to the feeding and discharging directions are crown ends.
  5. 5. The dual short stator winding of claim 4, wherein when the number of layers n of the core slots is 6, x is 2, the winding cycle includes a first barrier span 8 coil and a second barrier span 8 coil disposed between the feed end or the same layer span 8 coil and the same layer span 9 coil; the first interlayer span 8 coil is wound between two layers and three layers of the stator core, and the span between the welding end of the first interlayer span 8 coil and the welding end of the same layer span 8 coil is 8 core slots; The second interlayer span 8 coil is wound between four layers and five layers of the stator core, the span between the welding end of the second interlayer span 8 coil and the welding end of the first interlayer span 8 coil is 8 iron core grooves, and the span between the welding end of the second interlayer span 8 coil and the welding end of the same-layer span 9 coil is 8 iron core grooves. The winding cycle further includes a third barrier span 8 coil and a fourth barrier span 8 coil disposed between the same-layer span 9 coil and the same-layer span 8 coil or neutral point; The third interlayer span 8 coil is wound between five layers and four layers of the stator core, and the span between the welding end of the third interlayer span 8 coil and the welding end of the same-layer span 9 coil is 8 core slots; The fourth interlayer span 8 coil is wound between three layers and two layers of the stator core, the span between the welding end of the fourth interlayer span 8 coil and the welding end of the third interlayer span 8 coil is 8 iron core grooves, and the span between the welding end of the fourth interlayer span 8 coil and the welding end or neutral point of the same-layer span 8 coil is 8 iron core grooves.
  6. 6. The double short stator winding of claim 4, wherein the coils at the crown end include four types of wire, respectively 2 and 3 layers of span 8 coils, 4 and 5 layers of span 8 coils, 6 and 6 layers of span 9 coils, and 1 layer of span 8 coils when the number of layers n of the core slot is 6.
  7. 7. The dual short-range stator winding of any of claims 1-6, wherein the co-layer span 8 coil is wound on a radially outermost layer of the stator core and the co-layer span 9 coil is wound on a radially innermost layer of the stator core; Or the same-layer span 8 coil is wound on the radially innermost layer of the stator core, and the same-layer span 9 coil is wound on the radially outermost layer of the stator core.
  8. 8. The double short-distance stator winding according to claim 1, wherein coil ends on the same side of the winding unit as the feeding direction and the discharging direction are welded ends, and coil ends on the opposite side of the winding unit from the feeding direction and the discharging direction are crown ends.
  9. 9. The double short-distance stator winding according to claim 8, wherein the coils at the crown end include three types of wire, respectively 1-layer and 2-layer span 8 coils, 3-layer and 4-layer span 8 coils, and 5-layer and 6-layer span 8 coils when the number of layers n of the core slot is 6.
  10. 10. An electric motor stator comprising a stator core and a stator winding wound around the stator core, the stator winding being a double short-range stator winding as claimed in any one of claims 1 to 9.
  11. 11. An electric machine comprising the electric machine stator of claim 10.

Description

Double short-distance stator winding, motor stator and motor Technical Field The invention relates to the technical field of motor windings, in particular to a double short-distance stator winding, a motor stator and a motor. Background With the rapid development of new energy automobile technology, the driving motor is used as the most important driving equipment of the electric automobile, and the performance requirements on the driving motor are higher and higher. The stator winding in the driving motor is used as an important component, the structure is complex, the integration level is high, and the stator winding is a main heating component in the operation of the motor, so that the structural optimization of the stator winding is an important means for ensuring the normal operation of the driving motor and prolonging the service life. In the stator winding, the number of slots of the coil is smaller than that of slots of the whole-distance winding, namely the short-distance winding, and the short-distance winding can improve the NVH performance of the motor, but in the existing short-distance scheme, most of the coils are of a whole-distance line type, only a small part of coils are of a short-distance line type, and the coils of the whole-distance line type are obviously longer than those of the coils of the short-distance line type, so that the existing stator winding is not beneficial to reducing the copper consumption and can increase the resistance and copper loss. Disclosure of Invention The invention aims to overcome the defect that the coil structure of the existing stator winding in the prior art is not beneficial to reducing the copper consumption, and provides a double short-distance stator winding, a motor stator and a motor. The technical scheme of the invention provides a double short-distance stator winding which is wound in iron core slots of a stator iron core, wherein the number of layers of the iron core slots of the stator iron core is n, the number of slots of each pole per phase is m, the number of pole pairs is p, the number of slots is s, and the pole distance is tau, wherein m=s/(2p×3), and tau=s/2 p; The phase winding on the stator core comprises a plurality of winding units, the winding units comprise a plurality of winding cycles, the winding cycles comprise x interlayer span tau-1 coils, 1 same-layer span tau coil and x interlayer span tau-1 coils which are sequentially connected, and the winding cycles are sequentially connected through the same-layer span tau-1 coils; if the number of layers n is even, x= (n-2)/2, if the number of layers n is odd, x= (n-1)/2. In one optional technical scheme, the number m of slots of each pole of the stator core is 3, the number n of layers of slots of the core is an odd multiple of two, the pole pitch tau is 9, and the stator core comprises three-phase windings, wherein each phase of phase windings is uniformly arranged in the circumferential direction of the stator core, and the three phases of phase windings are sequentially and adjacently arranged; Each phase of phase winding comprises at least three groups of winding units, the winding units are uniformly arranged for a circle along the circumferential direction of the stator core, each winding unit comprises two identical-layer span 8 coils and three winding cycles, the first winding cycle is connected between an electric inlet end and the identical-layer span 8 coils, the second winding cycle is respectively connected between one identical-layer span 8 coil and the other identical-layer span 8 coil, the third winding cycle is connected between the identical-layer span 8 coils and a neutral point, and the two winding cycles are adjacently arranged; the same-layer span 8 coil is reversely wound along the first layer of the stator core and is connected with the next winding unit connection or neutral point. In one alternative technical scheme, the winding cycle comprises at least two interlayer span 8 coils and one same-layer span 9 coil, wherein the same-layer span 9 coil is wound forward along the tail layer of the stator core, one half of the interlayer span 8 coils are connected with the same-layer span 9 coil from the two layers of the stator core after being connected with the power feeding end or the same-layer span 8 coils, the other half of the interlayer span 8 coils are connected with the same-layer span 9 coils and are reversely wound to be connected with the same-layer span 8 coils or the next winding unit from the last second layer of the core slots with six forward intervals of the same-layer span 9 coils. In one of the alternative solutions, the coil end on the opposite side of the winding unit to the power in direction and the power out direction is a welding end, and then the coil end on the same side of the winding unit to the power in direction and the power out direction is a crown end. In one of the alternative solutions, when the number of layers n of the core