Composite electrical steel and iron core using same

Abstract

The utility model provides composite electrical steel which comprises a plurality of thin electrical steel sheets arranged in a bonding and stacking mode, the thickness d of the thin electrical steel sheets is smaller than or equal to 0.2 mm, and the thickness D of the composite electrical steel is larger than or equal to 0.2 mm. The utility model further provides an iron core which comprises the composite electrical steel, and the multiple pieces of composite electrical steel are connected in a stacked mode. The composite electrical steel meeting the stamping thickness is formed by stacking the thin electrical steel sheets, so that the composite electrical steel can be stamped, the technical problem that the thin electrical steel sheets cannot be stamped is solved, the shearing and stamping efficiency of the composite electrical steel can be improved, the precision requirements of a punching machine and a feeding machine are reduced, and the production cost is reduced. And the punched and sheared composite electrical steel is laminated to form the iron core, so that the magnetic loss can be reduced by adopting the thin electrical steel sheet, the production efficiency of the iron core can be improved, and the overall service life and the use quality of the iron core are ensured.

Description

Technical Field

[0001] The present application relates to the field of iron core technology, and in particular to a composite electrical steel and an iron core using the composite electrical steel. Background Art

[0002] With the development of electric vehicles, high requirements are placed on the performance of motors. High energy efficiency and high power density are becoming increasingly important. One of the important influencing factors is the design of the motor core. There are hysteresis losses and eddy current losses in the core, and both losses increase with the increase of motor frequency. The thickness of the electrical steel sheet is a major variable of these two losses. The thinner the electrical steel sheet, the smaller these two losses. At present, electrical steel sheets are mainly made by stamping process. However, thin electrical steel sheets cannot be stamped, and the precision requirements of the punching machine and the feeder are very high, which makes it difficult to use thin electrical steel sheets for the production of cores. Utility Model Content

[0003] In order to solve the above-mentioned deficiencies of the prior art, the first object of the present application is to provide a composite electrical steel that can reduce hysteresis loss and eddy current loss and can be stamped to produce iron cores.

[0004] The present application is implemented through the following technical solution: a composite electrical steel, comprising a plurality of thin electrical steel sheets bonded and stacked, the thickness of the thin electrical steel sheets being d≤0.2mm, and the thickness of the composite electrical steel being D≥0.2mm.

[0005] Furthermore, 0.1 mm ≤ d ≤ 0.2 mm.

[0006] Furthermore, 0.1 mm ≤ d ≤ 0.15 mm.

[0007] Furthermore, 0.2mm≤D≤0.8mm.

[0008] Furthermore, 0.2mm≤D≤0.35mm.

[0009] Furthermore, the thicknesses of the plurality of thin electrical steel sheets are equal or unequal.

[0010] Furthermore, one or both sides of the thin electrical steel sheet are coated with a self-adhesive coating.

[0011] A second object of the present application is to provide an iron core comprising the composite electrical steel described above, wherein the composite electrical steel is in multiple layers and connected in layers.

[0012] Furthermore, both end surfaces of the iron core are coated with an insulating layer.

[0013] Furthermore, adjacent composite electrical steels are bonded to each other via a self-adhesive coating and / or adjacent composite electrical steels are buckled to each other.

[0014] The present application forms a composite electrical steel having a stamping thickness that meets the requirements of stamping by stacking a plurality of thin electrical steel sheets, so that the composite electrical steel can be stamped, thereby solving the technical problem that thin electrical steel sheets cannot be stamped, and improving the shearing and stamping efficiency of the composite electrical steel, reducing the precision requirements of the punching machine and the feeder. The stamped and sheared composite electrical steel is then stacked to form an iron core, which can not only reduce magnetic loss by using thin electrical steel sheets, but also improve the production efficiency of the iron core, and ensure the overall life and use quality of the iron core. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a structural schematic diagram of the composite electrical steel of the present application.

[0017] Figure 2 This is another structural schematic diagram of the composite electrical steel of the present application.

[0018] Figure 3 This is another structural schematic diagram of the composite electrical steel of the present application.

[0019] Figure 4 This is another structural schematic diagram of the composite electrical steel of the present application.

[0020] Figure 5 It is a structural schematic diagram of the iron core of the present application.

[0021] Figure 6 It is another structural schematic diagram of the iron core of the present application. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions 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. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for which protection is sought, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0024] In addition, it should be understood that although the terms first, second, third, etc. may be used in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0025] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically limited. It should also be understood that the term "and / or" used in this article refers to and includes any or all possible combinations of one or more associated listed items.

[0026] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between 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 present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] The following is a detailed description of a composite electrical steel and an iron core using the composite electrical steel of the present application in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0029] Please refer to Figures 1 to 6 As shown, the present application provides an iron core 1, which includes a plurality of composite electrical steels 2, wherein the plurality of composite electrical steels 2 are stacked and connected, and both end surfaces of the iron core 1 in the central axis direction are coated with an insulating layer.

[0030] The composite electrical steel 2 comprises a plurality of bonded and stacked thin electrical steel sheets 3, the thickness d of the thin electrical steel sheets 3 being ≤ 0.2 mm, and the thickness D of the composite electrical steel being ≥ 0.2 mm.

[0031] The thin electrical steel sheets 3 having a thickness of less than or equal to 0.2 mm are bonded and stacked to form the composite electrical steel 2, and the thickness of the composite electrical steel 2 is greater than or equal to 0.2 mm, so that the composite electrical steel 2 meets the requirements of stamping thickness, solves the technical problem that thin electrical steel sheets cannot be stamped, and can improve the shearing and stamping efficiency of the composite electrical steel, reduce the accuracy requirements of the punching machine and the feeder, and then a number of the stamped and sheared composite electrical steels 2 are stacked to form the iron core 1, which can not only reduce the magnetic loss by using thin electrical steel sheets, but also improve the production efficiency of the iron core, and can also ensure the connection effect between the thin electrical steel sheets 3, thereby ensuring the use quality and service life of the iron core 1.

[0032] Among them, 0.1mm≤d≤0.2mm, preferably 0.1mm≤d≤0.15mm, 0.2mm≤D≤0.8mm, preferably 0.2mm≤D≤0.35mm. The thin electrical steel sheet 3 of this thickness has low magnetic loss and is conducive to the stamping and stacking of the laminated composite electrical steel 2.

[0033] The thickness of the plurality of thin electrical steel sheets 3 stacked to form the composite electrical steel 2 may be equal, for example, the thin electrical steel sheets 3 with d of 0.1 mm, 0.15 mm or 0.2 mm may be stacked. In this case, two or more thin electrical steel sheets 3 may be stacked to form the composite electrical steel 2. Please refer to Figure 1 , 2 As shown, of course, the thickness of the thin electrical steel sheet 3 may also be different, for example, the thin electrical steel sheets 3 with d of 0.1 mm and d of 0.15 mm, or d of 0.1 mm and d of 0.2 mm, or d of 0.15 mm and d of 0.2 mm are stacked. Of course, the number of layers is not limited to only two layers. For example, three layers of the thin electrical steel sheets 3 with d of 0.1 mm, 0.15 mm, and 0.2 mm are used for compounding. Please refer to Figure 3 , 4 The thicknesses of the thin electrical steel sheets 3 stacked to form the composite electrical steel 2 are preferably equal.

[0034] The thickness of the plurality of composite electrical steels 2 that are composited into the core 1 may be equal, please refer to Figure 5 As shown, they may not be equal, please refer to Figure 6 As shown, the former is preferred.

[0035] One side or both sides of the thin electrical steel sheet 3 are coated with a self-adhesive coating, that is, the thin electrical steel sheets 3 are bonded and stacked by the self-adhesive coating, and the composite electrical steels 2 can be connected by bonding and stacking and / or buckling.

[0036] Since the composite electrical steel 2 has a thickness that satisfies the stamping and shearing conditions, the composite electrical steel 2 can be fastened together in addition to being bonded and stacked. Of course, bonding and fastening can also be used simultaneously.

[0037] The above is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Although the present application has been disclosed as a preferred embodiment as above, it is not intended to limit the present application. Any technician familiar with the profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present application. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still falls within the scope of the technical solution of the present application.

Claims

1. A composite electrical steel, characterized in that: The composite electrical steel comprises a plurality of bonded and stacked thin electrical steel sheets, wherein the thickness d of the thin electrical steel sheets is less than or equal to 0.2 mm, and the thickness D of the composite electrical steel is greater than or equal to 0.2 mm.

2. The composite electrical steel according to claim 1, characterized in that: 0.1mm≤d≤0.2mm.

3. The composite electrical steel according to claim 2, characterized in that: 0.1mm≤d≤0.15mm.

4. The composite electrical steel according to claim 1, characterized in that: 0.2mm≤D≤0.8mm.

5. The composite electrical steel according to claim 4, characterized in that: 0.2mm≤D≤0.35mm.

6. The composite electrical steel according to claim 1, characterized in that: The thicknesses of the plurality of thin electrical steel sheets are equal or unequal.

7. The composite electrical steel according to claim 1, characterized in that: One or both sides of the thin electrical steel sheet are coated with a self-adhesive coating.

8. An iron core, characterized in that: The composite electrical steel comprises any one of claims 1 to 7, wherein the composite electrical steel is in multiple layers and connected in layers.

9. The core according to claim 8, characterized in that Both end surfaces of the iron core are coated with insulating layers.

10. The core according to claim 8, characterized in that Adjacent composite electrical steels are bonded to each other via a self-adhesive coating and / or adjacent composite electrical steels are buckled to each other.

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