CN-224218152-U - Thermally enhanced stator structure and motor

CN224218152UCN 224218152 UCN224218152 UCN 224218152UCN-224218152-U

Abstract

The utility model relates to the technical field of motors, in particular to a heat enhancement stator structure and a motor, wherein the heat enhancement stator structure comprises a stator magnetic yoke and a plurality of stator teeth; the stator yokes are arranged in a ring shape, each stator tooth is arranged on the inner side of the stator yoke in a periodic manner and extends towards the center of the stator yoke, the stator yokes are arranged in a staggered manner along the arrangement of the stator teeth to form a first stator yoke and a second stator yoke with different radiuses, the radiuses of the first stator yoke are larger than those of the second stator yoke, the first stator yoke and the end parts of the two stator teeth form fan-shaped first stator grooves, the second stator yoke and the side parts of the two stator teeth form fan-shaped second stator grooves, and a third stator groove is arranged between the two first stator grooves. The space utilization rate of the stator structure is improved through the stator grooves formed by the first stator yokes and the second stator yokes with different radiuses, and the third stator grooves are formed in the outer sides of the stator yokes to enhance heat dissipation capacity.

Inventors

He Tianran
ZHU ZIQIANG
LIANG DAWEI

Assignees

同济大学

Dates

Publication Date: 20260508
Application Date: 20250408

Claims (10)

1. The thermally enhanced stator structure is characterized by comprising a stator yoke and a plurality of stator teeth; The stator magnet yoke is annularly arranged, and each stator tooth is periodically arranged on the inner side of the stator magnet yoke and extends towards the center of the stator magnet yoke; The stator yokes are arranged along the stator teeth in a staggered manner to form a first stator yoke and a second stator yoke with different radiuses, and the radius of the first stator yoke is larger than that of the second stator yoke; the first stator yoke and the two ends of the stator teeth form a fan-shaped first stator groove, the second stator yoke and the two sides of the stator teeth form a fan-shaped second stator groove, and a third stator groove is arranged between the two first stator grooves.
2. The thermally enhanced stator structure of claim 1, wherein said first stator slot is divided into an upper space and a lower space along a radial direction of said stator teeth, said upper space having a radius equal to a radius of said second stator yoke; The thermally enhanced stator structure further includes a first phase winding, a second phase winding, and a third phase winding; The first phase winding, the second phase winding and the third phase winding are all arranged in the lower layer space of the first stator slot or the second stator slot in a penetrating mode.
3. The thermally enhanced stator structure of claim 2 wherein said first phase winding includes a first phase upper layer winding and a first phase lower layer winding, said second phase winding includes a second phase upper layer winding and a second phase lower layer winding, and said third phase winding includes a third phase upper layer winding and a third phase lower layer winding; The first phase upper layer winding, the second phase upper layer winding and the third phase upper layer winding are respectively penetrated with two adjacent second stator slots; The first phase lower layer winding, the second phase lower layer winding and the third phase lower layer winding are respectively penetrated into two lower layer spaces adjacent to the first stator groove.
4. A thermally enhanced stator structure according to claim 3 wherein said first phase upper layer winding is wound with two stator teeth which are also wound with said second phase lower layer winding and said third phase lower layer winding, respectively; The two stator teeth wound by the second-phase upper-layer winding are respectively wound by the first-phase lower-layer winding and the third-phase lower-layer winding; And the two stator teeth wound by the third phase upper layer winding are respectively wound by the first phase lower layer winding and the second phase lower layer winding.
5. The thermally enhanced stator structure of claim 4 wherein said first phase upper layer winding, said second phase upper layer winding and said third phase upper layer winding are each wound on said second stator yoke.
6. The thermally enhanced stator structure of claim 1, wherein a predetermined current density and a predetermined iron magnetic flux density of the thermally enhanced stator structure are set to obtain a maximum torque density.
7. The thermally enhanced stator structure of claim 1 wherein said third stator slot is provided on a side of said second stator yoke extending axially outward along both of said stator teeth, said third stator slot being configured as a heat dissipation channel.
8. The thermally enhanced stator structure of claim 1 further comprising a pole piece connected to an end of each of said stator teeth remote from said stator yoke.
9. The thermally enhanced stator structure of claim 2, wherein the number of said stator teeth is six, the number of said first stator slots, said second stator slots and said third stator slots is three, the number of said first phase winding, said second phase winding and said third phase winding is two, respectively, said two first phase windings, said two second phase windings and said two third phase windings are 180 degrees rotated about the center axis of said stator yoke as the center of rotation, respectively, and the current directions are opposite.
10. An electric machine comprising a rotor and a thermally enhanced stator structure according to any of claims 1 to 9, said rotor being arranged in the centre of said thermally enhanced stator structure.

Description

Thermally enhanced stator structure and motor Technical Field The utility model relates to the technical field of motors, in particular to a heat enhancement stator structure and a motor. Background High speed permanent magnet (HIGHSPEED PERMANENT MAGNET, HSPM) motors include different slot and pole number combinations, 2-pole rotors are widely used to reduce fundamental frequency. The alternating arrangement of the two-coil pitch (2-CP) windings provides a relatively large output torque and a high torque density, but its overlapping end windings results in a long rotor axial length, low critical rotational speed and high production costs. Meanwhile, in Ultra high speed (Ultra HIGH SPEED, UHS) applications, a non-overlapping 2-CP winding configuration has not been adopted. At present, only half of the slots of the ultra-high-speed permanent magnet motor adopting the non-overlapped 2-CP winding configuration are utilized, the unused space is blocked by the end surface winding, and the conduction heat transfer between the stator and the surrounding environment is blocked due to the contact thermal resistance between the stator core and the frame. The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present utility model and is not intended to represent an admission that the foregoing is prior art. Disclosure of utility model The utility model mainly aims to provide a heat enhancement stator structure and a motor, and aims to solve the technical problems of low space utilization rate and low output torque of the motor in the prior art. In order to achieve the above object, the present utility model provides a thermally enhanced stator structure comprising a stator yoke and a plurality of stator teeth; The stator magnet yoke is annularly arranged, and each stator tooth is periodically arranged on the inner side of the stator magnet yoke and extends towards the center of the stator magnet yoke; The stator yokes are arranged along the stator teeth in a staggered manner to form a first stator yoke and a second stator yoke with different radiuses, and the radius of the first stator yoke is larger than that of the second stator yoke; the first stator yoke and the two ends of the stator teeth form a fan-shaped first stator groove, the second stator yoke and the two sides of the stator teeth form a fan-shaped second stator groove, and a third stator groove is arranged between the two first stator grooves. Optionally, the first stator slot is divided into an upper space and a lower space along the radial direction of the stator teeth, and the radius of the upper space is the same as the radius of the second stator yoke; The thermally enhanced stator structure further includes a first phase winding, a second phase winding, and a third phase winding; The first phase winding, the second phase winding and the third phase winding are all arranged in the lower layer space of the first stator slot or the second stator slot in a penetrating mode. Optionally, the first phase winding comprises a first phase upper layer winding and a first phase lower layer winding, the second phase winding comprises a second phase upper layer winding and a second phase lower layer winding, and the third phase winding comprises a third phase upper layer winding and a third phase lower layer winding; The first phase upper layer winding, the second phase upper layer winding and the third phase upper layer winding are respectively penetrated with two adjacent second stator slots; The first phase lower layer winding, the second phase lower layer winding and the third phase lower layer winding are respectively penetrated into two lower layer spaces adjacent to the first stator groove. Optionally, the two stator teeth wound by the first phase upper layer winding are also wound by the second phase lower layer winding and the third phase lower layer winding respectively; The two stator teeth wound by the second-phase upper-layer winding are respectively wound by the first-phase lower-layer winding and the third-phase lower-layer winding; And the two stator teeth wound by the third phase upper layer winding are respectively wound by the first phase lower layer winding and the second phase lower layer winding. Optionally, the first phase upper layer winding, the second phase upper layer winding and the third phase upper layer winding are all wound on the second stator yoke. Optionally, a preset current density and a preset iron magnetic flux density of the thermally enhanced stator structure are set to obtain a maximum torque density. Optionally, the third stator groove is disposed on a side of the second stator yoke extending outward from the axial center along the two stator teeth, and the third stator groove is configured as a heat dissipation channel. Optionally, the thermally enhanced stator structure further comprises a pole piece connected to an end of each of the stator teeth remote from t