Search

CN-122026655-A - Stator assembly and motor

CN122026655ACN 122026655 ACN122026655 ACN 122026655ACN-122026655-A

Abstract

The invention relates to the technical field of motors, and discloses a stator assembly and a motor. The stator assembly comprises a stator iron core, stator windings, a stator winding and a plurality of coil winding, wherein the stator iron core is provided with a plurality of stator teeth, a stator groove is formed in a part of the stator iron core between any two adjacent stator teeth, the plurality of stator teeth are provided with a plurality of tooth groups, each tooth group comprises at least two stator teeth, the stator winding comprises a plurality of coils which are arranged in a one-to-one correspondence with the plurality of tooth groups, each coil is wound on the corresponding tooth group and is provided with at least two coil bodies and two wire outgoing ends, the coil is formed by winding one wire, the next coil body is wound after the winding of the last coil body is completed along the arrangement direction of the at least two coil bodies, and the winding directions of any two adjacent coil bodies are opposite in the plurality of coils. Each coil replaces at least two single rectangular coils, at least two welding ends are reduced, space requirements caused by welding are reduced, welding spot defect risks are reduced, and reliability and service life of the stator assembly are improved.

Inventors

  • JI XIAOJUN
  • ZHOU WEN
  • LI ZHOUQING

Assignees

  • 广东汇天航空航天科技有限公司

Dates

Publication Date
20260512
Application Date
20241112

Claims (16)

  1. 1. A stator assembly, comprising: a stator core (1) having a plurality of stator teeth (102) distributed along a circumferential direction thereof, a portion of the stator core (1) between any adjacent two of the stator teeth (102) forming a stator slot (101), the plurality of stator teeth (102) forming a plurality of tooth groups, the number of stator teeth (102) within the plurality of tooth groups being the same, each tooth group including at least two of the stator teeth (102) that are continuously adjacent; The stator winding comprises a plurality of coils (3), and the coils (3) and the tooth groups are arranged in one-to-one correspondence; In each coil (3), the coil (3) is wound on the corresponding tooth group, the coil (3) is provided with at least two coil bodies (301) and two wire outlet ends (302), the at least two coil bodies (301) are arranged in one-to-one correspondence with the at least two stator teeth (102) in the tooth group, the coil (3) is formed by winding a wire, the next coil body (301) is wound after the winding of the last coil body (301) is completed along the arrangement direction of the at least two coil bodies (301), and the two ends of the wire extend out of the coil bodies (301) to form the wire outlet ends (302); in the plurality of coils (3), the winding directions of any two adjacent coil bodies (301) are opposite.
  2. 2. The stator assembly according to claim 1, characterized in that all the wire outlets (302) are located on the same side of the stator core (1), the spacing between any adjacent two wire outlets (302) being the same.
  3. 3. The stator assembly according to claim 2, characterized in that a number of the coils (3) is divided into a first coil (303) and a second coil (304) of the same number, the first coil (303) and the second coil (304) being alternately distributed in the circumferential direction, each of the coil bodies (301) having a number of coil layers arranged in sequence in the radial direction of the stator core (1), each of the coil layers having an inner conductor section (3011) located in the stator slot (101) and an outer conductor section (3012) located outside the stator slot (101); In the first coil (303), both ends of the wire extend out of the coil body (301) along the extending direction of the inner conductor section (3011) to form the wire outlet end (302); In the second coil (304), both ends of the wire are bent with respect to the outer conductor segment (3012) toward a direction away from the coil body (301) to form the wire outlet end (302).
  4. 4. A stator assembly according to claim 3, characterized in that the outer conductor segments (3012) are straight segments arranged perpendicular to the inner conductor segments (3011) or that both outer conductor segments (3012) are arcuate segments arched away from each other.
  5. 5. The stator assembly according to any one of claims 1 to 4, characterized in that it further comprises a busbar assembly, phase outgoing lines (6) and a neutral line (7), the busbar assembly comprising a number of connection lines (5), a number of the coils (3) forming a multiphase winding, a number of the coils (3) in each phase of the winding being connected in series in turn by the connection lines (5), a head of each phase of the winding being connected to the phase outgoing lines (6), a tail of the multiphase winding being connected by the neutral line (7).
  6. 6. The stator assembly according to claim 5, wherein the connecting wires (5) comprise a connecting body (501) and two connecting ends (502), the connecting ends (502) are connected with the corresponding outgoing ends (302), and the connecting bodies (501) of a plurality of the connecting wires (5) are sequentially staggered along the axial direction of the stator core (1).
  7. 7. The stator assembly of claim 6, wherein the connection body (501) has a first connection section (5011), a first transition section (5012), a second connection section (5013), a second transition section (5014), and a third connection section (5015) that are sequentially disposed, the second connection section (5013) is disposed away from an end face of the stator core (1) with respect to the first connection section (5011), and the third connection section (5015) is disposed away from an end face of the stator core (1) with respect to the second connection section (5013).
  8. 8. Stator assembly according to claim 7, characterized in that the connection wire (5) is an enamelled wire.
  9. 9. The stator assembly according to claim 7, wherein the connection line (5) further comprises a first fixing body (503), a second fixing body (504) and a third fixing body (505), the first fixing body (503) is disposed on the first connection section (5011), the second fixing body (504) is disposed on the second connection section (5013), the third fixing body (505) is disposed on the second connection section (5013), and the second fixing body (504) on the connection line (5) far from the stator core (1) is fixedly connected with the first fixing body (503) on the connection line (5) near the stator core (1) in two adjacent connection lines (5), and the third fixing body (505) on the connection line (5) far from the stator core (1) is fixedly connected with the second fixing body (504) on the connection line (5) near the stator core (1).
  10. 10. The stator assembly according to claim 9, characterized in that one of the first and second fixed bodies (503, 504) fixedly connected has a first fixed pin (5031) and the other has a first fixed hole (5041) cooperating with the first fixed pin (5031), and in fixedly connecting the third and second fixed bodies (505, 504) one has a second fixed pin (5042) and the other has a second fixed hole (5051) cooperating with the second fixed pin (5042); Or the first fixing body (503) and the second fixing body (504) which are fixedly connected are connected in an adhesive mode, and the third fixing body (505) which is fixedly connected is connected with the second fixing body (504) in an adhesive mode.
  11. 11. The stator assembly of claim 10, wherein the first stationary body (503) has a first stationary pin (5031), the second stationary body (504) has a staggered arrangement of second stationary pins (5042) and first stationary holes (5041), and the third stationary body (505) has a second stationary hole (5051).
  12. 12. Stator assembly according to claim 5, characterized in that the connection bodies (501) of several connection lines (5) are arranged in a staggered manner in sequence in the radial direction of the stator core (1).
  13. 13. Stator assembly according to claim 5, characterized in that the coil (3) has two coil bodies (301), the number of connecting wires (5) being the number of stator slots (101)/2-3.
  14. 14. The stator assembly according to any of claims 1 to 4, characterized in that the coil (3) has two coil bodies (301), the ratio of the number of stator slots (101) to the number of rotor poles of the electric machine being 12:10.
  15. 15. The stator assembly according to any one of claims 1 to 4, characterized in that the coil (3) has two coil bodies (301), the number of coils (3) being half the number of stator slots (101).
  16. 16. An electrical machine comprising a stator assembly as claimed in any one of claims 1 to 15.

Description

Stator assembly and motor Technical Field The invention relates to the technical field of motors, in particular to a stator assembly and a motor. Background At present, the motor can be divided into concentrated windings and distributed windings according to different structures and arrangement modes of windings, wherein the concentrated windings are concentrated on a part of magnetic poles or the whole magnetic poles, and the distributed windings are formed by dispersing the windings on a plurality of magnetic poles or in stator slots. The concentrated winding has the advantages of simple manufacture, small winding head and low ohmic loss, and has the defects of harmonic wave generation, high loss and obvious torque pulsation especially under the high-speed condition. The distributed winding has the advantages of low harmonic proportion, low loss, low torque fluctuation and noise, complex manufacture and larger winding head. Both types of windings have different advantages and disadvantages, when concentrated windings are used, and when distributed windings are used, depending on the size of the motor and its application. At present, concentrated winding adopts single rectangle coil to wind, and the connection needs the welding between two coils, and the solder joint is more, and the potential fault point is more also, and then influences stator module's reliability and life-span, and more solder joints need more welding operation, and welding time is long, and welding efficiency is low, has increased manufacturing time and cost. Disclosure of Invention In view of this, the invention provides a stator assembly and a motor, so as to solve the problems of many welding spots and many fault points caused by welding connection between two coils when a single coil is adopted in a concentrated winding. The stator assembly comprises a stator iron core, a stator winding and a plurality of coils, wherein the stator iron core is provided with a plurality of stator teeth distributed along the circumferential direction of the stator iron core, stator grooves are formed in the part between any two adjacent stator teeth, the plurality of stator teeth form a plurality of tooth groups, the number of the stator teeth in the plurality of tooth groups is the same, each tooth group comprises at least two continuously adjacent stator teeth, the stator winding comprises the plurality of coils which are arranged in a one-to-one correspondence manner, the coils are wound on the corresponding tooth groups, the coils are provided with at least two coil bodies and two wire outlets, the at least two coil bodies are arranged in a one-to-one correspondence manner with the at least two stator teeth in the tooth groups, the coils are formed by winding one wire, the next coil body is wound after the winding of the last coil body is completed, the two ends of the wire extend out of the coil body to form wire outlets, and the winding directions of the at least two coil bodies are opposite. The stator assembly has the advantages that one coil with at least two coil bodies is formed by winding one wire, each coil is wound on at least two stator teeth of a corresponding tooth group, namely, each coil is provided with at least two coil bodies which are rectangular, each coil is only provided with two wire outlet ends, the wire outlet ends form welding ends, each coil replaces at least two single rectangular coils, each coil can reduce at least two welding ends, and therefore space requirements caused by welding are reduced, the risk of welding spot defects is also reduced, reliability and service life of the stator assembly are improved, welding operation is correspondingly reduced after the welding ends are reduced, welding time is shortened, welding efficiency is improved, and manufacturing time and cost are reduced. In an alternative embodiment, all the wire outlets are located on the same side of the stator core, and the spacing between any two adjacent wire outlets is the same. The stator core has the beneficial effects that the wire outlet ends are conveniently welded on the same side of the stator core, the height of the stator assembly in the axial direction can be reduced, and the occupied space is small. All the outgoing terminals are uniformly distributed along the circumferential direction, only one connecting wire is adopted at the moment, so that the types of the connecting wires are reduced, the occupied space is small, the process is simple, the materials are simple, the cost is reduced, and the error rate in the installation and maintenance processes can be reduced. In an alternative embodiment, the plurality of coils are divided into a first coil and a second coil with the same number, the first coil and the second coil are alternately distributed along the circumferential direction, each coil body is provided with a plurality of coil layers which are sequentially arranged along the radial direction of the stator core, each coi