Method for increasing groove area of stator iron core, stator iron core, stator and motor

[0024] Such as figure 1 As shown, the method for increasing the slot area of ​​the stator core provided by Embodiment 1 of the present invention is suitable for the outer contour including two opposite first straight outer edges 101, two opposite second straight outer edges 102 and four opposite straight outer edges. A stator core 1 with two corner outer edges 103, wherein, two first straight outer edges 101 are opposite and arranged in parallel, and two second straight outer edges 102 are opposite and arranged in parallel. Specifically, the stator core 1 includes a circumferentially closed stator yoke 11 and several stator teeth 12 protruding inside the stator yoke 11 at intervals along the circumferential direction, and any two adjacent stator teeth 12 are enclosed to form a stator slot. The stator tooth 12 includes a tooth neck 121 connected to the stator yoke 11 and a tooth shoe 122 protruding from the end of the tooth neck 121. Each tooth shoe 122 encloses and forms a ro...

[0040] Such as figure 2As shown, the same as the first embodiment, the method for increasing the area of ​​the stator core slots provided by this embodiment is also to increase the recessed depth of the stator slots recessed toward the outer edge 101 of the first straight side to form The first stator slot 13 and the bottom slot walls of the stator slots that are recessed towards the corner outer edge 103 and the second straight outer edge 102 are facing the corner with the distance between the second straight outer edge 102 constant. The outer edge 103 is concavely extended to form the second stator slot 14, and also the distance H1 from the bottom slot wall 131 of the first stator slot 13 to the first straight outer edge 101, the bottom slot wall 141 of the second stator slot 14 The distance H2 to the positioning hole 15 is all set to be greater than or equal to the distance H0 from the bottom groove wall 141 of the second stator groove 14 to the second straight edge outer ...

[0044] Such as image 3 As shown, the same as Embodiment 1 and Embodiment 2, the method for increasing the area of ​​the stator core slot provided by this embodiment is also to set the recessed depth of the stator slots recessed toward the outer edge 101 of the first straight side Increase to form the first stator slot 13 and the bottom groove walls of the stator slots recessed towards the corner outer edge 103 and the second straight outer edge 102 at the same time to keep the distance between the second straight outer edge 102 constant The way is concavely extended towards the corner outer edge 103 to form the second stator slot 14, and also the distance H1 from the bottom slot wall 131 of the first stator slot 13 to the first straight outer edge 101, and the distance between the second stator slot 14 The distance H2 from the bottom groove wall 141 to the positioning hole 15 is set to be greater than or equal to the distance H0 from the bottom groove wall 141 of the second s...