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CN-224233409-U - Stator punching sheet

CN224233409UCN 224233409 UCN224233409 UCN 224233409UCN-224233409-U

Abstract

The application relates to the technical field of motor stators, in particular to a stator punching sheet, which comprises an integrally annular yoke part, wherein teeth which are uniformly distributed along the circumference are contained in the yoke part, tooth grooves are formed between two adjacent tooth parts, one side of each tooth groove, which is close to the yoke part, is provided with an arc shape, the other ends of a plurality of tooth parts are provided with shoe parts, each shoe part is provided with an arc shape, the arc length of each shoe part is smaller than the arc length of one side, which is close to the yoke part, of each tooth groove, and the surface of each yoke part, which corresponds to the tooth groove, is provided with uniformly distributed heat dissipation grooves. The application can effectively improve the torque output by the motor and prolong the service life of the motor.

Inventors

  • WEI XIAOFEI

Assignees

  • 佛山市南海区绿智电机设备有限公司

Dates

Publication Date
20260512
Application Date
20250424

Claims (8)

  1. 1. The stator punching sheet is characterized by comprising integrally annular yoke parts (1), wherein tooth parts (2) uniformly distributed along the circumference are contained in the yoke parts (1), tooth grooves (3) are formed between two adjacent tooth parts (2), one side, close to the yoke parts (1), of each tooth groove (3) is arranged into an arc shape, the other ends of the tooth parts (2) are respectively provided with a shoe part (4), each shoe part (4) is arranged into an arc shape, the arc length of each shoe part (4) is smaller than the arc length of one side, close to the yoke parts (1), of each tooth groove (3), and uniformly distributed heat dissipation grooves (5) are formed in the surface, corresponding to the tooth grooves (3), of each yoke part (1).
  2. 2. A stator punching sheet according to claim 1, characterized in that the width dimension of the yoke portion (1) is larger than or equal to the length dimension of the tooth portion (2).
  3. 3. A stator punching sheet according to claim 1, characterized in that the side of the shoe (4) adjacent to the tooth slot (3) is provided in an arc shape.
  4. 4. A stator punching sheet as claimed in claim 3, characterized in that the heat dissipation grooves (5) are in communication with the inner sides of the tooth slots (3).
  5. 5. A stator punching sheet as claimed in claim 4, characterized in that the heat dissipation grooves (5) at the positions of the tooth grooves (3) are all communicated with each other.
  6. 6. A stator punching sheet according to claim 5, characterized in that the outside of the yoke (1) is provided with a first communication hole (11), and the first communication hole (11) extends to the inside of the yoke (1) and communicates with the plurality of heat dissipation grooves (5).
  7. 7. A stator punching sheet according to claim 6, characterized in that the surface of the yoke portion (1) is provided with a second communication hole (12) communicating with the first communication hole (11).
  8. 8. A stator punching sheet as claimed in claim 6, characterized in that a dividing strip (13) is provided in the first communication hole (11) to divide the interior of the first communication hole (11) into two chambers.

Description

Stator punching sheet Technical Field The application relates to the technical field of motor stators, in particular to a stator punching sheet. Background An ac motor is a device for converting ac electric energy into mechanical energy, and is widely applied to the fields of industry, household appliances, transportation and the like, in the ac motor, a rotor is a core component for generating induced electromotive force and electromagnetic torque and realizing electromechanical energy conversion, and comprises an iron core, a winding, a rotating shaft and the like, a stator mainly comprises the iron core, the winding, an end cover and the like, and the core function is to generate a rotating magnetic field. The existing stator punching sheet is generally arranged into a multi-tooth groove structure with 24/34 grooves so as to obtain larger motor torque output, so that the size of a stator yoke part is reduced, the guide resistance is increased, the conductor impedance is increased, and meanwhile, the proximity effect is easy to occur due to the reduction of the distance between connected coils, so that the current density around a conductor contact surface is reduced, and the heat management and the efficiency improvement of a motor are not facilitated. Disclosure of utility model In order to effectively improve the torque output by the motor and prolong the service life of the motor, the application provides a stator punching sheet. The application provides a stator punching sheet, which comprises an integrally annular yoke part, wherein teeth which are uniformly distributed along the circumference are contained in the yoke part, tooth grooves are formed between two adjacent tooth parts, one side of each tooth groove, which is close to the yoke part, is provided with an arc shape, the other ends of a plurality of tooth parts are provided with shoe parts, each shoe part is provided with an arc shape, the arc length of each shoe part is smaller than the arc length of one side, which is close to the yoke part, of each tooth groove, and the surface, which corresponds to the tooth groove, of each yoke part is provided with uniformly distributed heat dissipation grooves. By adopting the technical scheme, the design of the integrally annular yoke part is convenient for arrangement, installation and space utilization in the motor, tooth grooves are uniformly distributed along the circumference, so that uniform arrangement of stator windings of the motor is facilitated, one side of the tooth groove, which is close to the yoke part, is arc-shaped, compared with the traditional straight-edge design, the magnetic field distribution is more uniform, the local magnetic resistance in a magnetic circuit is reduced, and the electromagnetic conversion efficiency of the motor is improved; In addition, the heat dissipation grooves are uniformly distributed on the surface of the yoke part corresponding to the tooth grooves, so that the contact area between the yoke part and a cooling medium is increased, the heat dissipation effect can be enhanced, the temperature of the motor during operation is reduced, and the efficiency and reliability of the motor are improved. Optionally, the width dimension of the yoke is greater than or equal to the length dimension of the tooth. By adopting the technical scheme, the width dimension of the yoke part is larger than or equal to the length dimension of the tooth part, the dimension of the stator yoke part can be effectively increased, the magnetic flux of the stator yoke part can be increased, the magnetic resistance is reduced, the magnetic field distribution is more uniform, the electromagnetic conversion efficiency of the motor is improved, the motor outputs larger torque and power, meanwhile, the magnetic flux density distribution is more reasonable, the iron loss in unit volume is reduced, the motor heating is reduced, and the efficiency and the reliability of the motor are improved. Optionally, one side of the boot part close to the tooth groove is arc-shaped. Through adopting above-mentioned technical scheme, the boots portion is close to the one side of tooth's socket and sets up to the arc, has further optimized the distribution of air gap magnetic field for the magnetic field is smoother, has reduced the abrupt change and the distortion of magnetic field, thereby has reduced the electromagnetic noise and the vibration of motor, has improved the stability and the travelling comfort of motor operation. Optionally, the heat dissipation groove is communicated with the inner side of the tooth groove. Through adopting above-mentioned technical scheme, the inboard of heat dissipation recess and tooth's socket is linked together for cooling medium can form more smooth and easy flow path between heat dissipation recess and tooth's socket, can take away the heat that the winding produced in the tooth's socket better, improves radiating efficiency, especially to the comparatively concent