Magnet yoke monomer, magnet yoke and motor

Abstract

The invention relates to a magnet yoke single body. The magnet yoke single body comprises a splicing part and an extending part, one side of each splicing part is provided with a bulge, the other side of each splicing part is provided with a groove, and the two magnet yoke single bodies can be spliced through the bulge of one magnet yoke single body and the groove of the other magnet yoke single body; the width of the extension part is smaller than that of the splicing part, and the extension part is used for extending into a magnetic field. The magnet yoke single bodies can be inserted into the winding of the motor to form the magnet yoke in a splicing mode, the uncoated winding part of the stator iron core is coated, the winding coating rate is improved, and then the energy utilization rate and the working efficiency of the motor are improved.

Description

Technical Field

[0001] The present application relates to the field of motors, and in particular, to a yoke monomer, a yoke, and a motor. Background Art

[0002] Traditional motors mostly use round wire windings, while flat wire windings have gradually become the mainstream choice due to their high slot fill rate and excellent heat dissipation performance. The development of flat wire motor core technology has promoted the improvement of motor performance, and with the increasing demand for new energy vehicles and high-end industrial equipment, the power density and efficiency requirements of motors are also driving the innovation of core manufacturing technology.

[0003] In the prior art, the stator is made of stacked silicon steel sheets of the same shape, and the stator slots tightly wrap the windings covered with an insulating layer. The winding ends of the flat wire motor often have exposed parts. In order to avoid contact between the stator and the winding at the ends and cause a short circuit, this part of the winding is set not to be wrapped by the stator, which wastes a section of the winding that can be used. The stator does not achieve the most ideal coverage rate for the winding, resulting in a loss of usable energy. Summary of the invention

[0004] The purpose of the present application is to provide a spliced ​​yoke monomer for a motor, which is used to solve the problem of energy loss caused by low winding coverage in the prior art, and helps to improve the winding coverage and thus improve the motor.

[0005] In order to achieve the above objectives, the technical solutions provided in this application are as follows:

[0006] In the first aspect, a yoke monomer comprises a splicing portion and an extension portion; the splicing portion has a protrusion on one side and a groove on the other side, and two yoke monomers can be spliced ​​together through the protrusion of one yoke monomer and the groove of another yoke monomer; the width of the extension portion is smaller than the width of the splicing portion, and the width of the extension portion in the normal direction of the splicing direction changes from large to small, and the extension portion is used to extend into the magnetic field. In the above technical solution, the yoke monomer can be connected with the splicing portion of other yoke monomers through the splicing portion, and has good interchangeability; extending the extension portion into the magnetic field can supplement the uncoated winding part of the stator and improve the utilization rate of magnetic energy; through the size gradient design, the yoke monomer can be extended into the winding gap while not in direct contact with the winding, thereby avoiding the problem of short circuit after the yoke monomer contacts the winding.

[0007] As a preferred solution, the extension part has chamfers on both sides. In the above technical solution, the extension part has chamfers on both sides, and the yoke monomer can have a higher thickness, thereby increasing the volume of the extension part penetrating into the winding gap, further improving the utilization rate of magnetic energy.

[0008] As a preferred solution, the protrusion and the groove are both in the shape of a triangle, a rectangle or a trapezoid. In the above technical solution, the protrusion and the groove are set in the shape of a triangle or a trapezoid, which can well realize the splicing and also has good guidance, reducing the difficulty of installation; the protrusion and the groove are set in the shape of a rectangle, and the connection is more firm.

[0009] The present application also provides a yoke, comprising a plurality of the above-mentioned yoke monomers; each of the above-mentioned yoke monomers is sequentially spliced ​​and matched with the above-mentioned grooves of the adjacent above-mentioned yoke monomers through the above-mentioned protrusions to form a circular ring. In the above-mentioned technical solution, each yoke monomer can be connected with the above-mentioned splicing parts of other yoke monomers through the splicing parts, and each yoke monomer is a detachable individual with good interchangeability; a plurality of yoke monomers form a circular yoke, which is suitable for rotating motors and can supplement the uncoated winding parts of the stator to improve the utilization rate of magnetic energy.

[0010] The present application also provides a yoke, comprising a plurality of the above-mentioned yoke monomers; each of the above-mentioned yoke monomers is sequentially spliced ​​and matched with the above-mentioned grooves of the adjacent above-mentioned yoke monomers through the above-mentioned protrusions to form a rectangle. In the above-mentioned technical solution, each yoke monomer can be connected with the above-mentioned splicing parts of other yoke monomers through the splicing parts, and each yoke monomer is a detachable individual with good interchangeability; a plurality of yoke monomers form a rectangular yoke, which is suitable for linear motors and can supplement the uncoated winding parts of the stator to improve the utilization rate of magnetic energy.

[0011] The present application also provides a motor, comprising a rotor, a stator, a winding, and at least one yoke; the extension portion of each yoke monomer extends into the winding; the yoke is arranged on one side of the stator. In the above technical solution, each yoke monomer can be connected with the splicing portion of other yoke monomers through a splicing portion, and each yoke monomer is a detachable individual with good interchangeability; multiple yoke monomers form a yoke, which can supplement and cover the uncoated winding part of the stator, thereby improving the utilization rate of magnetic energy.

[0012] As a preferred solution, the winding is a flat wire winding. In the above technical solution, the flat wire winding has exposed parts at both ends, and this part of the winding is arranged not to be wrapped by the stator core. By inserting the extension of each yoke monomer into the gap between the exposed parts at both ends of the flat wire winding, the unwrapped winding part of the stator can be supplemented and covered, thereby improving the utilization rate of magnetic energy.

[0013] As a preferred solution, the extension of each yoke monomer has a chamfered side facing away from the stator. In the above technical solution, because the flat wire winding end is close to the stator part of the non-rectangular structure, the yoke monomer extension is chamfered, which can increase the thickness of the yoke monomer while making the extension insert more volume of the flat wire winding, thereby improving the coverage of the winding and improving the utilization rate of magnetic energy.

[0014] As a preferred solution, at least one of the corresponding positions of the yoke unit and the stator is provided with a buckle, and the other is provided with a slot, and the two are fixed by being engaged. In the above technical solution, the stator and the yoke unit can be fixed by the cooperation of the buckle and the slot, thereby improving the stability of the structure.

[0015] As a preferred solution, the extension portion of each yoke monomer has an insulating layer on its surface. In the above technical solution, the yoke monomer has an insulating layer on its surface, which can further avoid the problem of short circuit caused by the yoke monomer contacting the winding.

[0016] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 The figure shows a schematic structural diagram of an embodiment of a yoke monomer provided by the present application;

[0019] Figure 2 The figure is a bottom view of an embodiment of a yoke monomer provided by the present application;

[0020] Figure 3 Shown are structural schematic diagrams of some embodiments of the yoke monomer provided in the present application;

[0021] Figure 4 Shown is a structural schematic diagram of an embodiment of a magnetic yoke provided in the present application;

[0022] Figure 5 Shown is a schematic structural diagram of an embodiment of a motor provided by the present application;

[0023] Explanation of the reference numerals: 1. yoke unit; 11. splicing portion; 111. groove; 112. protrusion; 12. extension portion; 13. slot; 2. stator; 3. winding. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] In the prior art, the stator is made of stacked silicon steel sheets of the same shape, and the stator slots tightly wrap the windings covered with an insulating layer. The winding ends of the flat wire motor often have exposed parts. In order to avoid contact between the stator and the winding at the ends and cause a short circuit, this part of the winding is set not to be wrapped by the stator, which wastes a section of the winding that can be used. The stator does not achieve the most ideal coverage rate for the winding, resulting in a loss of usable energy.

[0028] In order to solve the technical problem of low cooling efficiency in the prior art, the present application provides a yoke monomer 1, a yoke and a motor. The yoke monomer 1 can be assembled into a yoke in a splicing manner. The yoke is arranged on both sides of the stator 2, which can supplement the winding part that the stator 2 cannot cover, thereby improving the utilization rate of magnetic energy by the motor, which is beneficial to improving the power density of the motor.

[0029] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0030] The present application provides a yoke monomer 1, which includes a splicing portion 11 and an extension portion 12; one side of the splicing portion 11 has a protrusion 112, and the other side has a groove 111, and two yoke monomers 1 can be spliced ​​through the protrusion 112 of one yoke monomer 1 and the groove 111 of another yoke monomer 1; the width of the extension portion 12 is smaller than the width of the splicing portion 11, and the extension portion 12 is used to extend into the magnetic field. In the above technical solution, the yoke monomer 1 can be connected with the splicing portion 11 of other yoke monomers 1 through the splicing portion 11, and has good interchangeability; extending the extension portion 12 into the magnetic field can supplement the uncoated part of the winding 3 of the stator 2, thereby improving the utilization rate of magnetic energy.

[0031] In some embodiments, Figure 1 As shown, the yoke monomer 1 is formed by stacking a number of thin silicon steel sheets and is in a "T-shape", including a splicing portion 11 and an extension portion 12. A triangular protrusion 112 and a triangular groove 111 are respectively provided on both sides of the splicing portion 11. Two yoke monomers 1 of the same model can be spliced ​​and matched through the triangular protrusion 112 and the triangular groove 111.

[0032] Optionally, the width of the splicing portion 11 and the extension portion 12 along the normal direction of the splicing direction changes from large to small. Through the size gradient design, there is room for adjustment when the extension portion 12 extends into the winding 3, which improves the fault tolerance of the assembly and avoids the problem of the extension portion 12 contacting the winding 3 and causing a short circuit due to installation.

[0033] Optionally, chamfers are provided on both sides of one side of the extension portion 12. Figure 3 As shown in (a), the size and shape of the chamfer can be selected according to the specific scenario, and the upper half of the cross section of the extension portion 12 can be made trapezoidal, triangular or semicircular by chamfering. The yoke monomer 1 can have a higher thickness by chamfering, thereby increasing the volume of the extension portion 12 penetrating into the gap of the winding 3.

[0034] Optionally, the protrusion 112 and the groove 111 can be in the shape of a rectangle, an arc-shaped rectangle, a circle, an ellipse or other combinations thereof. Figure 3 As shown in (b), the protrusion 112 and the groove 111 can both be trapezoidal, which can provide good guidance and better stability; Figure 3 As shown in (c), the protrusion 112 and the groove 111 can also be rectangular, which makes the connection more secure.

[0035] In the above embodiment, the yoke monomer 1 is highly modularized and can be spliced ​​together. It has good interchangeability, can flexibly supplement the covered winding 3, and has a simple structure and is easy to install.

[0036] In some other embodiments, the yoke unit 1 may also be made of alumina ceramics or the like, and may be insulated by being coated with an insulating layer or plated with an insulating layer material.

[0037] In some other embodiments, the yoke monomer 1 may also be made of a variety of materials through additive manufacturing and other technologies, and the magnetic conductivity may be improved through the selection and combination of different materials.

[0038] The present application also provides a yoke, comprising a plurality of yoke monomers 1; each yoke monomer 1 is sequentially spliced ​​and matched with the groove 111 of the adjacent yoke monomer 1 through the protrusion 112 to form a circular ring or rectangle. In the above technical solution, each yoke monomer 1 can be connected with the splicing portion 11 of other yoke monomers 1 through the splicing portion 11, and each yoke monomer 1 is a detachable individual with good interchangeability; multiple yoke monomers 1 form a yoke, which can supplement the uncoated winding 3 part of the stator 2 to improve the utilization rate of magnetic energy; the circular ring yoke can be used in a rotary motor, and the rectangular yoke can be used in a linear motor.

[0039] In some embodiments, several yoke monomers 1 are spliced ​​and matched in sequence with the triangular grooves 111 of adjacent yoke monomers 1 through triangular protrusions 112 to form a circular yoke, and the extensions 12 of several yoke monomers 1 constitute a tooth structure, which can be inserted into the winding 3 to supplement the coating of the exposed part of the winding 3 to improve the utilization rate of magnetic energy.

[0040] Optionally, the width of the splicing portion 11 and the extension portion 12 of each yoke monomer 1 along the normal direction of the splicing direction changes from large to small. Through the size gradient design, when the extension portion 12 of each yoke monomer 1 extends into the winding 3, there is room for adjustment, which improves the fault tolerance of the assembly and avoids the problem of the extension portion 12 contacting the winding 3 and causing a short circuit due to installation.

[0041] Optionally, chamfers are provided on both sides of one side of the extension portion 12 of each yoke monomer 1. Figure 3 As shown in (a), the size and shape of the chamfer can be selected according to the specific scenario, and the chamfer can be used to make the upper half of the cross section of the extension portion 12 of each yoke monomer 1 a trapezoid, a triangle or a semicircle, etc. The chamfer can make each yoke monomer 1 have a higher thickness, thereby increasing the volume of the extension portion 12 of each yoke monomer 1 that penetrates into the gap of the winding 3.

[0042] Optionally, the protrusion 112 and the groove 111 of the joint portion 11 of each yoke unit 1 can be in the shape of a rectangle, an arc-edged rectangle, a circle, an ellipse or other combinations thereof. Figure 3 As shown in (b), the protrusion 112 and the groove 111 can both be trapezoidal, which can provide good guidance and better stability; Figure 3As shown in (c), the protrusion 112 and the groove 111 can also be rectangular, which makes the connection more secure.

[0043] In the above embodiment, the yoke is formed into an integral body by splicing and matching highly modular yoke monomers 1. The yoke monomers 1 have good interchangeability, can flexibly supplement the covering winding 3, and have a simple structure and are easy to install.

[0044] In some other embodiments, each yoke monomer 1 may also be made of alumina ceramics or the like, and may be insulated by being coated with an insulating layer or plated with an insulating layer material.

[0045] In some other embodiments, each yoke monomer 1 may also be made of a variety of materials through additive manufacturing and other technologies, and the magnetic conductivity may be improved through the selection and combination of different materials.

[0046] The present application also provides a motor, including a rotor (not shown), a stator 2, a winding 3, and at least one yoke; the extension portion 12 of each yoke monomer 1 extends into the winding 3; the yoke is arranged on one side of the stator 2. In the above technical solution, each yoke monomer 1 can be connected with the splicing portion 11 of other yoke monomers 1 through the splicing portion 11, and each yoke monomer 1 is a detachable individual with good interchangeability; multiple yoke monomers 1 form a yoke, which can supplement the covering of the uncovered winding 3 of the stator 2, thereby improving the utilization rate of magnetic energy.

[0047] In some embodiments, the stator 2 is formed by stacking silicon steel sheets of the same shape, and the slots of the stator 2 tightly wrap the winding 3 covered with an insulating layer. Two yokes are respectively arranged at both ends of the stator 2 and inserted into the exposed winding 3 to increase the coverage rate at both ends of the winding 3 and improve the utilization rate of magnetic energy.

[0048] In the above embodiment, the yoke can pass through the portion of the winding 3 that cannot be covered by the stator 2, thereby increasing the coverage rate of the winding 3 and further increasing the utilization rate of the magnetic energy, enabling the motor to have a higher power density in a smaller volume.

[0049] Optionally, the winding 3 is a flat wire winding 3, and the structure of the flat wire winding 3 can be I-pin, Hair-pin, X-pin, S-winding, etc. The winding 3 can be made of copper, aluminum, iron, etc. conductors. The flat wire winding 3 has exposed parts at both ends, and this part of the winding 3 is set not to be wrapped by the stator 2 slot. By inserting the extension part 12 of each yoke monomer 1 into the gap between the exposed parts at both ends of the flat wire winding 3, the unwrapped part of the winding 3 of the stator 2 can be supplemented and covered, thereby improving the utilization rate of magnetic energy.

[0050] Optional, such as Figure 3As shown in (a), the size and shape of the chamfer can be selected according to the specific scenario. The chamfer can be used to make the upper half of the cross section of the extension part 12 of each yoke monomer 1 a trapezoid, a triangle or a semicircle, etc. The chamfered side of the extension part 12 of each yoke monomer 1 faces away from the stator 2, and the extension part 12 can be inserted into the winding 3 with the maximum cross-sectional area. The chamfer can ensure that the extension part 12 does not interfere with or contact the winding 3. Because the end of the flat wire winding 3 is close to the stator 2 and the part is not rectangular, the extension part 12 of the yoke monomer 1 is provided with a chamfer, which can increase the thickness of the yoke monomer 1 while making the extension part 12 insert more volume into the flat wire winding 3, thereby improving the coverage of the winding 3 and the utilization rate of magnetic energy.

[0051] Optionally, one of the corresponding positions of each yoke monomer 1 and stator 2 is provided with a buckle (not shown), and the other is provided with a slot 13, and the two are fixed by clamping. The combination of the buckle and the slot 13 can achieve the fixation of the stator 2 and the yoke monomer 1, thereby improving the stability of the structure.

[0052] Optionally, the extension portion 12 of each yoke monomer 1 has an insulating layer on its surface, which may be insulating paper. The surface of the yoke monomer 1 is coated with insulating paper, which can further avoid the problem of short circuit between the yoke monomer 1 and the winding 3.

[0053] In some other embodiments, the motor may be of other types such as an embedded type or an internal rotor type.

[0054] In some other embodiments, each yoke unit 1 may be insulated by being plated with an insulating layer material.

[0055] The steps for installing the yoke provided in this application are as follows:

[0056] S1, pre-fix each yoke monomer 1 in a mold with a diameter slightly larger than the diameter of the stator 2 along the circumferential direction to ensure equidistance, height and concentricity to form a pre-assembled body;

[0057] S2, placing the pre-assembled body on the end surface of the stator 2, with its bottom surface close to the end surface of the stator 2;

[0058] S3, tightening the mold inwards to splice and fit the protrusions 112 and grooves 111 of adjacent yoke monomers 1 to form a yoke;

[0059] S4, adjusting the yoke posture so that the extension portion 12 of each yoke monomer 1 is inserted into the gap between the windings 3, ensuring that the yoke monomer 1 is not in direct contact with the winding 3, and each yoke monomer 1 is fixed to the stator 2 by the cooperation of the buckle and the slot 13;

[0060] S5. Directly connect the yoke and the stator 2 by gluing.

[0061] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0062] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A yoke monomer, characterized in that: The yoke monomer includes a splicing portion and an extension portion; One side of the splicing portion has a protrusion, and the other side has a groove, and the two yoke monomers can be spliced ​​through the protrusion of one yoke monomer and the groove of the other yoke monomer; The width of the extension portion is smaller than the width of the splicing portion, and the width of the extension portion in the normal direction of the splicing direction changes from large to small. The extension portion is used to extend into the magnetic field.

2. The yoke monomer according to claim 1, characterized in that: Chamfers are arranged on both sides of one side of the extension portion.

3. The yoke monomer according to claim 1, characterized in that: The protrusion and the groove are both in the shape of a triangle, a rectangle or a trapezoid.

4. A yoke, characterized in that: comprising a plurality of yoke monomers as described in claims 1 to 3; Each of the yoke monomers is sequentially spliced ​​and matched with the groove of the adjacent yoke monomer through the protrusion to form a circular ring.

5. A yoke, characterized in that: comprising a plurality of yoke monomers as described in claims 1 to 3; Each of the yoke monomers is sequentially spliced ​​and matched with the groove of the adjacent yoke monomer through the protrusion to form a rectangle.

6. A motor, characterized in that: include: A rotor, a stator, a winding, and at least one yoke as claimed in claim 4 or claim 5; The extension portion of each of the yoke monomers extends into the winding; The yoke is disposed at one side of the stator.

7. The motor according to claim 6, characterized in that The winding is a flat wire winding.

8. The motor according to claim 7, characterized in that The extending portion of each of the yoke units has a chamfered surface facing away from the stator.

9. The motor according to claim 6, characterized in that At least one of the corresponding positions of the yoke monomer and the stator is provided with a buckle, and the other is provided with a slot, and the two are fixed by matching and snapping.

10. The motor according to claim 6, characterized in that The surface of the extension portion of each of the yoke units has an insulating layer.

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