Primary core, primary assembly, linear motor and vehicle

Abstract

This utility model discloses a primary iron core, a primary assembly, a linear motor, and a vehicle. The primary iron core includes a yoke and multiple teeth. The yoke has a hollow cavity, and the multiple teeth are disposed within the hollow cavity. The multiple teeth are spaced apart along the axial direction of the hollow cavity, and the spacing is used to arrange windings. The yoke includes a first magnetically conductive part and a first insulating part. The first magnetically conductive part includes multiple segmented parts distributed radially from the inside to the outside of the hollow cavity. The first insulating part is disposed between adjacent segmented parts radially along the hollow cavity. The primary iron core, primary assembly, and vehicle of this utility model can reduce eddy current losses and reduce heat generation.

Description

Technical Field

[0001] This utility model relates to linear motors, and more particularly to a primary iron core, a primary component, a linear motor, and a vehicle. Background Technology

[0002] The primary core of a cylindrical linear motor cannot be simply constructed by stacking silicon steel sheets. Currently, a coreless design is commonly used, but this design suffers from low thrust density. Some designs use a single piece of magnetically conductive steel or cast iron as the primary stator core; however, this design's primary stator core cannot block eddy currents, resulting in significant eddy current losses and severe overheating during motor operation. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a primary iron core that can reduce eddy current losses and reduce heat generation.

[0004] This utility model also proposes a primary component having the aforementioned primary iron core.

[0005] This utility model also proposes a linear motor having the aforementioned primary components.

[0006] This utility model also proposes a vehicle having the above-mentioned linear motor.

[0007] The primary iron core according to a first aspect embodiment of the present invention comprises:

[0008] The yoke has a hollow cavity;

[0009] Multiple teeth are disposed within the hollow cavity, and the multiple teeth are spaced apart along the axial direction of the hollow cavity, the spacing being used to accommodate windings;

[0010] The yoke includes a first magnetically conductive part and a first insulating part. The first magnetically conductive part includes a plurality of segmented parts distributed radially from the inside to the outside along the hollow cavity. The first insulating part is disposed between adjacent segmented parts radially along the hollow cavity.

[0011] The primary iron core according to the embodiments of this utility model has at least the following beneficial effects:

[0012] The first magnetically conductive section includes multiple segments radially distributed from the inside out within the hollow cavity. Since eddy currents pass through the first magnetically conductive section radially along the hollow cavity, the placement of a first insulating portion between adjacent segments along the radial direction of the hollow cavity increases the resistance of the flow path, thereby suppressing the eddy currents. Furthermore, the first insulating portion between adjacent first magnetically conductive sections prevents the formation of large circulating eddy currents between the multiple first magnetically conductive sections, further limiting the size of the eddy currents and thus reducing eddy current losses.

[0013] According to some embodiments of the present invention, multiple segments are arranged sequentially along a spiral line and connected to form a whole.

[0014] According to some embodiments of the present invention, along the radial direction of the hollow cavity, a first welding portion is provided between the beginning of the innermost segment and at least the adjacent segment, and a second welding portion is provided between the end of the outermost segment and at least the adjacent segment.

[0015] According to some embodiments of the present invention, the first insulating part is disposed on one side of the thickness direction of the first magnetically conductive part, and an adhesive layer is provided between adjacent segments and the first insulating part along the radial direction of the hollow cavity; or the first insulating part is disposed on opposite sides of the thickness direction of the first magnetically conductive part, and an adhesive layer is provided between adjacent segments along the radial direction of the hollow cavity.

[0016] According to some embodiments of the present invention, the first insulating portion is provided on the side of the innermost segment facing the tooth portion along the radial direction of the hollow cavity.

[0017] According to some embodiments of the present invention, the toothed portion includes a plurality of second magnetic conductive portions stacked along the axial direction of the hollow cavity, and a second insulating portion spaced between adjacent second magnetic conductive portions.

[0018] According to some embodiments of the present invention, the toothed portion includes multiple sub-teeth, which are arranged circumferentially along the hollow cavity.

[0019] A primary component according to a second aspect embodiment of the present invention includes:

[0020] The primary iron core described in the above embodiments; and

[0021] The winding is disposed within the hollow cavity and located at the interval between adjacent teeth.

[0022] According to some embodiments of the present invention, the primary component further includes an insulating filler portion, which fills at least between the winding and the tooth portion and within the gap of the winding.

[0023] A linear motor according to a third aspect of the present invention includes:

[0024] The primary component described in the above embodiments; and

[0025] The secondary component is inserted through the primary component and is capable of linear motion relative to the primary component.

[0026] A vehicle according to a fourth aspect of the present invention includes the linear motor described above.

[0027] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0029] Figure 1 This is a cross-sectional view of the primary iron core according to an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the yoke portion according to an embodiment of the present utility model;

[0031] Figure 3 for Figure 2 A magnified view of part A;

[0032] Figure 4 This is a partially enlarged schematic diagram of the yoke portion according to an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the teeth in an embodiment of the present utility model;

[0034] Figure 6 for Figure 5 A magnified view of part B;

[0035] Figure 7 This is a partially enlarged schematic diagram of the teeth in an embodiment of the present invention;

[0036] Figure 8 This is a schematic diagram of the teeth and windings in an embodiment of the present utility model;

[0037] Figure 9 This is a schematic diagram of the assembly of the teeth and windings in another embodiment of the present utility model.

[0038] Figure label:

[0039] 100, yoke; 110, first magnetically conductive part; 111, segmented part; 120, first insulating part; 100a, hollow cavity;

[0040] 200. Tooth section; 210. Second magnetic conductive section; 220. Second insulating section; 230. Split tooth;

[0041] 10. Windings. Detailed Implementation

[0042] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0044] In the description of the embodiments of this application, the technical terms "first," "second," "third," etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0045] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0046] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0047] In the description of the embodiments of this application, the technical terms "top", "bottom", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0048] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0049] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0050] Please refer to Figures 1-9 This application provides a primary iron core suitable for linear motors. The primary iron core includes a yoke 100 and a toothed portion 200.

[0051] Please refer to Figure 1 and Figure 2 The yoke 100 is cylindrical and has a hollow cavity 100a. Please refer to [reference needed]. Figure 1 and Figure 5 The teeth 200 are annular and there are multiple teeth 200, all located in the hollow cavity 100a. The multiple teeth 200 are spaced apart along the axial direction of the yoke 100, and the winding 10 is located at the intervals. It can be understood that the teeth 200 and the winding 10 have a channel in the middle, which is used for the secondary components to pass through.

[0052] This application also provides a primary component suitable for linear motors; please refer to [reference needed]. Figure 8 The primary component includes a primary iron core and a winding 10, which is disposed in the hollow cavity 100a and located at the interval between adjacent teeth 200.

[0053] This application also provides a linear motor, including a primary component and a secondary component, wherein the secondary component is disposed within the primary component and is capable of linear motion relative to the primary component. The specific principle is as follows: when an AC power source is applied to the primary component, a traveling wave magnetic field is generated. Under the cutting action of this traveling wave magnetic field, the secondary component induces an electromotive force and generates a current. This current interacts with the traveling wave magnetic field to generate an electromagnetic thrust, under which the secondary component moves linearly.

[0054] This application also provides a vehicle, including a linear motor. The vehicle refers to a wheeled vehicle driven or towed by a power device, used for transporting people or goods on roads, or for specialized engineering operations. Vehicles include electric vehicles / electric cars, pure electric vehicles, hybrid electric vehicles, range-extended electric vehicles, plug-in hybrid electric vehicles, and new energy vehicles, etc.

[0055] Please refer to Figures 2-4 The yoke 100 includes a first magnetically conductive part 110 and a first insulating part 120. The material of the first magnetically conductive part 110 is a metal with high magnetic permeability, such as silicon steel.

[0056] The first magnetically conductive part 110 includes a plurality of segmented parts 111 distributed radially from the inside to the outside along the hollow cavity 100a. Each segmented part 111 may be connected as a whole or formed separately, which will be described in detail later.

[0057] The first insulating portion 120 is disposed between the radially adjacent segments 111 along the hollow cavity 100a. The first insulating portion 120 is made of insulating material and insulatingly separates the plurality of first magnetically conductive portions 110 along the radial direction of the hollow cavity 100a.

[0058] Understandably, the first magnetically conductive section 110 includes multiple segmented sections 111 radially distributed from the inside out along the hollow cavity 100a. Since eddy currents pass through the first magnetically conductive section 110 radially along the hollow cavity 100a, the placement of the first insulating section 120 between adjacent segmented sections 111 radially along the hollow cavity 100a increases the resistance of the flow path, thereby suppressing the eddy currents. Furthermore, the first insulating section 120 between adjacent first magnetically conductive sections 110 prevents the formation of large circulating currents between the multiple first magnetically conductive sections 110, further limiting the size of the eddy currents and thus reducing eddy current losses.

[0059] Please refer to Figure 2 and Figure 3 In some embodiments, multiple segmented portions 111 are arranged sequentially along a spiral and connected as a whole. That is, the first magnetically conductive portion 110 is a continuous sheet that can be manufactured by spiral winding, thereby reducing the manufacturing cost of the yoke portion 100.

[0060] The segmented portions 111 can be divided using the following method: a virtual ray is provided, the starting point of which is located at the center line of the spiral. This ray passes through the beginning of the first magnetically conductive portion 110, dividing the first magnetically conductive portion 110 into multiple segmented portions 111. That is, except for the segmented portions 111 that are radially innermost along the hollow cavity 100a and radially outermost along the hollow cavity 100a, the beginning and end of the remaining segmented portions 111 are all on the aforementioned ray, and the end of the segmented portion 111 that is radially innermost along the hollow cavity 100a and the beginning of the segmented portion 111 that is radially outermost along the hollow cavity 100a are also on the ray.

[0061] The number of segmented sections 111 is not limited; it can be two, three, or more. In some specific implementations, the number of segmented sections 111 is 12. It is understood that the more segmented sections 111 there are, the more first insulating portions 120 are located between radially adjacent segmented sections 111, thereby increasing the resistance of the flow path to suppress eddy currents and reduce heat generation. The thickness of the segmented sections 111 can be designed according to the heat generation situation.

[0062] Furthermore, in some embodiments, the first insulating portion 120 is disposed on at least one side of the first magnetically conductive portion 110 in the thickness direction. By winding the first insulating portion 120 and the first magnetically conductive portion 110, the first insulating portion 120 is distributed between radially adjacent segments 111 along the hollow cavity 100a, thereby reducing the manufacturing difficulty of the yoke portion 100 and improving the manufacturing efficiency.

[0063] In other embodiments, the multiple segments 111 are formed separately and are closed ring structures. The radial dimensions of each segment 111 are different, so that they can be arranged sequentially from the inside to the outside in order of increasing radial dimensions, and a first insulating portion 110 is provided between radially adjacent segments 111.

[0064] In embodiments where multiple segments 111 are arranged sequentially along a spiral and connected as a single unit, in some embodiments, along the radial direction of the hollow cavity 100a, the beginning of the innermost segment 111 is provided with a first welded portion at least between it and an adjacent segment 111, and the end of the outermost segment 111 is provided with a second welded portion at least between it and an adjacent segment 111. That is, after winding, a first welded portion is formed by welding at the beginning of the innermost first magnetically conductive portion 110 along the radial direction of the hollow cavity 100a, and a second welded portion is formed at the end of the outermost first magnetically conductive portion 110 along the radial direction of the hollow cavity 100a, thereby fixing the first magnetically conductive portion 110 and preventing it from unraveling after winding.

[0065] In some embodiments, the first insulating portion 120 is disposed on one side of the first magnetically conductive portion 110 in the thickness direction, and an adhesive layer is provided between adjacent segments 111 and the first insulating portion 120 in the radial direction of the hollow cavity 100a. In other embodiments, the first insulating portion 120 is disposed on opposite sides of the first magnetically conductive portion 110 in the thickness direction, and an adhesive layer is provided between adjacent first insulating portions 120 in the radial direction of the hollow cavity 100a. The adhesive layer fixes the spirally wound first magnetically conductive portion 110 and first insulating portion 120, thereby preventing them from unraveling after winding.

[0066] In some specific embodiments, the first magnetic conductive part 110 is made of silicon steel, and the first insulating part 120 covers the first magnetic conductive part 110. Thus, the first magnetic conductive part 110 and the first insulating part 120 constitute a silicon steel sheet. Since the cost of obtaining silicon steel sheets is relatively low, the manufacturing cost of the linear motor can be reduced.

[0067] It is understandable that the toothed part 200 and the yoke part 100 are formed separately.

[0068] In some embodiments, a first insulating portion 120 is provided on the innermost segment 111 facing the tooth 200 along the radial direction of the hollow cavity 100a. The side of the segment 111 facing the tooth 200 is the inner side in the radial direction. It is understood that the first insulating portion 120 provided on the radially innermost segment 111 facing the tooth 200 can achieve insulation between the yoke 100 and the tooth 200, thereby further suppressing eddy currents and reducing heat generation.

[0069] The assembly method of the toothed portion 200 and the yoke portion 100 is not limited. In some embodiments, the outer diameter of the toothed portion 200 is slightly larger than the inner diameter of the yoke portion 100, and the two are interference-fitted. Specifically, to reduce the assembly difficulty, the yoke portion 100 can be heated to expand before being fitted onto the toothed portion 200. In other embodiments, the toothed portion 200 and the yoke portion 100 are clearance-fitted and fixed.

[0070] Please refer to Figures 5-7 In some embodiments, the tooth portion 200 includes a plurality of second magnetically conductive portions 210 stacked along the axial direction, and a second insulating portion 220 spaced between adjacent second magnetically conductive portions 210.

[0071] Understandably, the second insulating portion 220 is made of insulating material and, along the axial direction of the yoke portion 100, insulatingly separates the plurality of second magnetically conductive portions 210. This confines the flow of eddy currents within each second magnetically conductive portion 210. Since the flow direction of the eddy currents in the toothed portion 200 is axial along the hollow cavity, the second insulating portions 220 spaced between adjacent second magnetically conductive portions 210 narrow the flow path of the eddy currents, increasing the resistance of the flow path and thus suppressing the eddy currents. Furthermore, the second insulating portions 220 between adjacent second magnetically conductive portions 210 prevent the formation of large circulating currents between the plurality of second magnetically conductive portions 210, further limiting the size of the eddy currents and thus reducing eddy current losses.

[0072] The number of second magnetic conductive parts 210 included in each tooth 200 may be different. For example, the two teeth located at the top and bottom of the axial direction may include fewer second magnetic conductive parts 210 than the remaining teeth.

[0073] In some specific embodiments, the material of the second magnetic conductive part 210 is silicon steel, and the second insulating part 220 covers the second magnetic conductive part 210. In this way, the second insulating part 220 and the second magnetic conductive part 210 constitute a silicon steel sheet. Since the cost of obtaining silicon steel sheets is relatively low, the manufacturing cost of the linear motor can be reduced.

[0074] In some embodiments, the outer diameter of the winding 10 is not greater than the outer diameter of the tooth 200. It is understood that the outer annular surface of the tooth 200 abuts against the inner wall of the yoke 100, limiting the outer diameter of the winding 10 to not greater than the outer diameter of the tooth 200, thereby enabling the tooth 200 and the winding 10 to be assembled together in the hollow cavity 100a of the yoke 100.

[0075] The inner diameter of the winding 10 is not less than the inner diameter of the tooth 200, so that the inner annular surface of the winding 10 is completely between two adjacent teeth 200.

[0076] In some embodiments, the primary assembly further includes an insulating filler portion that fills at least between the winding 10 and the tooth 200. The insulating filler portion filled between the winding 10 and the tooth 200 can act as an adhesive, thereby forming the winding 10 and the tooth 200 into a single unit to facilitate subsequent assembly.

[0077] The winding 10 is made of enameled wire with gaps between the wires, and an insulating filler is also filled in the gaps between the wires. Furthermore, the insulating filler can also fill the inner annular surface of the winding 10, and the insulating filler filling the inner annular surface of the winding 10 does not extend radially beyond the inner annular surface of the tooth portion 200. The insulating filler can be made of resin.

[0078] Specifically, in the assembly process of the primary component, a hollow circular ring-shaped winding 10 is first wound on the skeleton or tooling. The circular toothed part 200 and the winding 10 are stacked alternately along the axial direction. After the stacking is completed, the lead wire is welded. Then, the whole is encapsulated with resin or other insulating materials to form an insulating filling part. Finally, the yoke part 100 is fitted in.

[0079] In some scenarios, a portion of the skeleton or tooling has an axially extending stop shaft in the middle. After all windings 10 have been wound and welded, the stop shaft obstructs the radial insertion of the toothed part 200 between adjacent windings 10. For this, please refer to... Figure 9 In some embodiments, the tooth portion 200 includes a plurality of individual teeth 230, which are arranged circumferentially along the hollow cavity 100a. It is understood that the plurality of individual teeth 230 are formed separately. After all the windings 10 are wound and welded, the plurality of individual teeth 230 of each tooth portion 200 are inserted radially between adjacent windings 10 and finally assembled into portion 200.

[0080] The specific number of the teeth 230 is not limited; it can be two or more. For example, the tooth portion 200 has two teeth 230, and the two teeth 230 are semi-ring structures. Each tooth 230 includes multiple magnetically conductive portions stacked along the axial direction of the yoke portion 100. The magnetically conductive portions of each tooth 230 are circumferentially spliced ​​together to form the second magnetically conductive portion 210.

[0081] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and all should be covered within the scope of the specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of protection.

Claims

1. A primary iron core, characterized in that, include: The yoke has a hollow cavity; Multiple teeth are disposed within the hollow cavity, and the multiple teeth are spaced apart along the axial direction of the hollow cavity, the spacing being used to accommodate windings; The yoke includes a first magnetically conductive part and a first insulating part. The first magnetically conductive part includes a plurality of segmented parts distributed radially from the inside to the outside along the hollow cavity. The first insulating part is disposed between adjacent segmented parts radially along the hollow cavity.

2. The primary iron core according to claim 1, characterized in that, The multiple segments are arranged sequentially along a spiral and connected to form a whole.

3. The primary iron core according to claim 2, characterized in that, Along the radial direction of the hollow cavity, a first welded portion is provided between the beginning of the innermost segment and at least the adjacent segment, and a second welded portion is provided between the end of the outermost segment and at least the adjacent segment. and / or; The first insulating part is disposed on one side of the thickness direction of the first magnetically conductive part, and an adhesive layer is provided between adjacent segments and the first insulating part along the radial direction of the hollow cavity; or the first insulating part is disposed on opposite sides of the thickness direction of the first magnetically conductive part, and an adhesive layer is provided between adjacent segments along the radial direction of the hollow cavity.

4. The primary iron core according to claim 1, characterized in that, Along the radial direction of the hollow cavity, the innermost segment is provided with the first insulating portion on the side facing the tooth.

5. The primary iron core according to claim 1, characterized in that, The toothed portion includes a plurality of second magnetic conductive portions stacked along the axial direction of the hollow cavity, and a second insulating portion spaced between adjacent second magnetic conductive portions.

6. The primary iron core according to claim 1, characterized in that, The toothed portion includes multiple sub-teeth, which are arranged circumferentially along the hollow cavity.

7. A primary component, characterized in that, include: The primary iron core as described in any one of claims 1-6; as well as The winding is disposed within the hollow cavity and located at the interval between adjacent teeth.

8. The primary component according to claim 7, characterized in that, The primary component also includes an insulating filler portion, which fills at least between the winding and the tooth portion.

9. A linear motor, characterized in that, include: The primary component as described in any one of claims 7-8; as well as The secondary component is inserted through the primary component and is capable of linear motion relative to the primary component.

10. A vehicle, characterized in that, Includes the linear motor as described in claim 9.

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