Novel motor structure
By setting a closed magnetic groove wedge and oblique leakage magnetic blocking groove at the notch of the motor stator core groove, the motor's problems in suppressing cogging torque and leakage are solved, and the magnetic field distribution optimization and production efficiency improvement are achieved.
Patent Information
- Application Number
- CN202420452219.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-08
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-03-08
AI Technical Summary
When existing motors suppress cogging torque, the use of chutes will increase production complexity and magnetic leakage, resulting in a decrease in motor performance. Although magnetic groove wedges can suppress magnetic leakage, there is still room for improvement in performance.
The slots of the stator core grooves are provided with closed magnetic grooves, and a diagonally arranged magnetic leakage blocking groove is opened on the grooves. Barriers are provided on both sides of the magnetic grooves to be clamped, forming a groove-free structure to suppress tooth grooves. The torque is maintained through the straight groove embedding process to reduce manufacturing costs.
Effectively suppress cogging torque, optimize magnetic field distribution, control magnetic leakage, maintain straight groove winding coefficient, and reduce manufacturing costs and construction difficulty.
Smart Images
Figure CN222282901U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a motor structure, in particular to a novel motor structure in which a slot opening of a stator core slot is provided with a magnetic slot wedge. Background Art
[0002] The motor structure includes a stator assembly and a rotor assembly, wherein the stator core of the stator assembly has a plurality of stator core slots evenly distributed in the circumferential direction, and the existence of the stator core slots enables the permanent magnet motor to generate a cogging torque.
[0003] In order to suppress the cogging torque, setting the stator core slots as skewed slots is an effective means, but the use of skewed slots will complicate the production process and reduce the winding coefficient. The use of magnetic slot wedges is also an effective means to suppress the cogging torque, but the use of magnetic slot wedges will increase the leakage magnetic flux of the motor, so that the motor efficiency is reduced. Utility Model Content
[0004] The utility model aims at the disadvantages of the prior art and provides a new motor structure.
[0005] The novel motor structure of the utility model comprises a stator assembly and a rotor assembly, and the slot openings of the stator core slots are provided with magnetic slot wedges for closing the slot openings.
[0006] In the novel motor structure described in the utility model, an obliquely arranged magnetic leakage blocking slot is provided in the length direction of the magnetic slot wedge.
[0007] In the novel motor structure described in the utility model, the two side walls of the slot are respectively provided with inwardly concave snap-in slots, and the two side edges of the magnetic slot wedge are respectively snap-into the snap-in slots on the corresponding sides.
[0008] In the novel motor structure described in the utility model, the magnetic slot wedge comprises a filling portion with a raised middle portion, and a clamping portion extending from the lower edges of both sides of the filling portion to both sides;
[0009] The locking portion is correspondingly locked in the locking port.
[0010] In the novel motor structure described in the utility model, the top surface of the filling portion is a plane, and the side edges of the top surface are respectively flush with the groove edges of the notch on the corresponding sides.
[0011] In the novel motor structure described in the utility model, the top surface of the filling portion is a concave arc surface, and the side edges of the top surface are respectively flush with the groove edges of the notch on the corresponding sides.
[0012] In the novel motor structure described in the utility model, the filling part is a hollow stepped platform, the top surface of the stepped platform is a concave arc surface, and the side edges of the top surface are respectively flush with the groove edges of the groove opening on the corresponding sides.
[0013] In the novel motor structure described in the utility model, the radius of the arc surface is equal to the radius of the inner hole of the stator core.
[0014] In the novel motor structure described in the utility model, the radius of the arc surface is equal to the outer circle radius of the stator core of the outer rotor motor.
[0015] In the novel motor structure described in the utility model, the leakage flux blocking slot includes a plurality of leakage flux blocking sub-slots distributed on the same straight line, and connecting ribs are provided between the leakage flux blocking sub-slots.
[0016] In the novel motor structure described in the utility model, a magnetic slot wedge is provided at the slot opening of the stator core slot to close the slot opening, so that the stator core slot presents a slotless structure, which can effectively suppress the tooth slot torque and optimize the magnetic field distribution; moreover, the obliquely arranged leakage magnetic blocking slot opened on the magnetic slot wedge also effectively controls the slot leakage magnetic flux of the motor; and, in terms of processing technology, the straight slot wire embedding process can still be used, so that the motor has a straight slot winding coefficient, which improves the slot utilization rate, reduces the difficulty of wire embedding construction, and reduces the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the novel motor structure described in the utility model;
[0018] Figure 2 Another schematic diagram of the novel motor structure of the utility model;
[0019] Figure 3 It is a partial schematic diagram of the stator punching sheet in the novel motor structure described in the utility model;
[0020] Figure 4 It is a schematic diagram of the end face of the magnetic slot wedge in the novel motor structure described in the utility model;
[0021] Figure 5 It is another end face schematic diagram of the magnetic slot wedge in the novel motor structure described in the utility model;
[0022] Figure 6 It is another end face schematic diagram of the magnetic slot wedge in the novel motor structure described in the utility model;
[0023] Figure 7 It is a structural schematic diagram of the magnetic slot wedge in the novel motor structure described in the utility model;
[0024] Figure 8It is a schematic diagram of the distribution of the leakage magnetic blocking slots on the magnetic slot wedges in the novel motor structure described in the utility model. DETAILED DESCRIPTION
[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.
[0026] like Figure 1 , Figure 7 As shown, the novel motor structure described in the utility model comprises a stator assembly 1 and a rotor assembly (not shown in the figure), wherein a coil winding 13 is wound in the stator core slot 12 of the stator assembly 1, and a magnetic slot wedge 3 closing the slot 120 is clamped in the slot 120 of the stator core slot 12. In the novel motor structure described in the utility model, by providing the magnetic slot wedge 3 closing the slot 120 at the slot 120 of the stator core slot 12, the stator core slot 12 presents a slotless structure, which can effectively suppress the cogging torque and torque fluctuation, and optimize the magnetic field distribution.
[0027] Furthermore, Figure 8 As shown, a magnetic flux leakage blocking slot 35 is obliquely arranged in the length direction of the magnetic slot wedge 3. Figure 8 As shown, the leakage magnetic blocking groove 35 may specifically include a plurality of leakage magnetic blocking sub-grooves 350 distributed on the same straight line, and the straight line is inclined at a predetermined angle to the length direction of the magnetic slot wedge 3. Connecting ribs 34 are further arranged between the leakage magnetic blocking sub-grooves 350 to separate the leakage magnetic blocking sub-grooves 350. For the leakage magnetic blocking sub-grooves 350 adjacent to the two ends of the magnetic slot wedge 3, connecting ribs 34 may also be arranged between the leakage magnetic blocking sub-grooves 350 and the ends of the magnetic slot wedge 3. In the utility model, the leakage magnetic blocking grooves 35 arranged obliquely on the magnetic slot wedge 3 are also used to effectively control the slot leakage of the motor, and the straight slot wire embedding process can still be used in the processing technology, so that the motor has a straight slot winding coefficient, which improves the slot utilization rate, reduces the difficulty of wire embedding construction, and reduces the manufacturing cost.
[0028] like Figure 3 As shown, in the new motor structure described in the utility model, concave snap-in slots 14, 15 are respectively provided on the two side walls of the slot 120, so that the two side edges 4 of the magnetic slot wedge 3 can be respectively snapped into the snap-in slots 14, 15 on the corresponding sides, which is convenient for construction operation and can also effectively limit and fix the magnetic slot wedge 3.
[0029] In the novel motor structure described in the utility model, the magnetic slot wedge 3 includes a filling portion 30 with a raised middle portion, and a clamping portion 4 extending from the lower edges of both sides of the filling portion 30 to both sides. When the magnetic slot wedge 3 is set, the clamping portions 4 on both sides are respectively clamped in the clamping holes 14 and 15 on the corresponding sides of the slot 120.
[0030] In the novel motor structure described in the utility model, the magnetic slot wedge 3 has a variety of application forms. It should be ensured that when the magnetic slot wedge 3 is installed in the slot 120, the top surface 31 of the raised filling portion 30 can form a circle with the same diameter as the inner hole of the stator core of the inner rotor type motor or the outer circle of the stator core of the outer rotor type motor, so that the stator core presents a slotless structure, which can effectively suppress the tooth slot torque and optimize the tooth magnetic field distribution.
[0031] For example, Figure 2 , Figure 4 As shown, the filling portion 30 is a hollow stepped platform, the top surface 31 of the stepped platform is a concave arc surface, the bottom of the stepped platform has a recessed space 321, and the bottom surface 32 is a convex arc surface, so that the filling portion 30 has a uniform thickness, and the two side edges 33 of the top surface 31 are respectively flush with the groove edges 11 of the groove 120 on the corresponding sides.
[0032] Or, if Figure 5 As shown, the top surface 31 of the filling portion 30 is a plane, and correspondingly, the bottom surface 32 of the filling portion 30 is also a plane, so that the filling portion 30 has a uniform thickness, and the side edges 33 of the top surface 31 are respectively flush with the groove edges 11 of the groove 120 on the corresponding sides.
[0033] Or, if Figure 6 As shown, the top surface 31 of the filling portion 30 is an inwardly concave arc surface, and correspondingly, the bottom surface of the filling portion 30 is an outwardly convex arc surface, so that the filling portion 30 has a uniform thickness, and the two side edges 33 of the top surface 31 are respectively flush with the groove edges 11 of the corresponding sides of the notch 120. Further, the radius of the arc surface of the top surface 31 can be made equal to the inner hole radius of the stator core (such as in the case of an inner rotor motor structure); or, the radius of the arc surface of the top surface 31 can be made equal to the outer circle radius of the stator core of the outer rotor motor.
[0034] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.
Claims
1. A novel motor structure, comprising a stator assembly and a rotor assembly, characterized in that: The slot openings of the stator core slots of the stator assembly are provided with magnetic slot wedges for closing the slot openings; A magnetic flux leakage blocking groove arranged obliquely is also provided in the length direction of the magnetic slot wedge.
2. The novel motor structure according to claim 1 is characterized in that: The two side walls of the slot are respectively provided with inwardly concave snap-in slots, and the two side edges of the magnetic slot wedge are respectively snap-into the snap-in slots on the corresponding sides.
3. The novel motor structure as claimed in claim 2 is characterized in that: The magnetic slot wedge comprises a filling portion with a raised middle portion, and a clamping portion extending from the lower edges of both sides of the filling portion to both sides respectively; The locking portion is correspondingly locked in the locking port.
4. The novel motor structure as claimed in claim 3 is characterized in that: The top surface of the filling portion is a plane, and the side edges of the top surface are flush with the groove edges of the groove opening on the corresponding sides.
5. The novel motor structure as claimed in claim 3 is characterized in that: The top surface of the filling portion is an inwardly concave arc surface, and the side edges of the top surface are respectively flush with the groove edges of the groove opening on the corresponding sides.
6. The novel motor structure as claimed in claim 3 is characterized in that: The filling portion is a hollow stepped platform, the top surface of which is an inwardly concave arc surface, and the side edges of the top surface are respectively flush with the groove edges of the groove opening on the corresponding sides.
7. The novel motor structure according to claim 5 or 6, characterized in that: The radius of the arc surface is equal to the radius of the inner hole of the stator core.
8. The novel motor structure according to claim 5 or 6, characterized in that: The radius of the arc surface is equal to the outer circle radius of the stator core of the outer rotor motor.
9. The novel motor structure according to claim 1, characterized in that: The magnetic flux leakage blocking groove comprises a plurality of magnetic flux leakage blocking sub-grooves distributed on the same straight line, and connecting ribs are arranged between the magnetic flux leakage blocking sub-grooves.