Motor iron core and motor

Abstract

The utility model discloses a motor iron core and a motor, and relates to the field of motors. The motor iron core comprises an iron core body and an insulating end plate, the iron core body is provided with a tooth part, and the tooth part is provided with two tooth end walls which are opposite in the longitudinal direction and two tooth side walls which are opposite in the transverse direction; the two tooth end walls are covered with the two insulation end plates respectively, the two ends, in the transverse direction, of the two insulation end plates correspondingly protrude out of the two tooth side walls, so that two coating die cavities are formed in the two sides, in the transverse direction, of the tooth part, and the two coating die cavities are each internally coated with an insulation coating. The motor iron core provided by the utility model has higher slot space factor and voltage resistance.

Description

Technical Field

[0001] The utility model relates to the field of motors, and in particular to a motor iron core and a motor. Background Art

[0002] At present, the market mainly uses two methods to insulate the teeth of motor cores: rubber coating and coating.

[0003] The thickness of the insulation layer on the surface of the core teeth after the rubber coating treatment is too large, resulting in a low motor slot fill rate; the coating treatment is to electrostatically coat a high-frequency curing epoxy resin layer on the tooth surface. Although the coating thickness is small and the motor slot fill rate is high, the thickness of the epoxy resin layer at the corners of the teeth is thinner than other areas, resulting in low core voltage resistance, which can usually only meet the working conditions of a peak voltage of 210V. Utility Model Content

[0004] The utility model aims to provide a motor core, which has the characteristics of high slot fill rate and high pressure resistance.

[0005] Another object of the present invention is to provide a motor having the characteristics of high slot fill rate and high voltage resistance.

[0006] The embodiment of the present utility model provides a technical solution:

[0007] A motor core comprises a core body and an insulating end plate, wherein the core body has a tooth portion, wherein the tooth portion has two tooth end walls opposite to each other in the longitudinal direction and two tooth side walls opposite to each other in the transverse direction;

[0008] The two insulating end plates are respectively covered on the two tooth end walls, and both ends of the two insulating end plates in the transverse direction protrude from the two tooth side walls to form two coating cavities on both sides of the tooth portion in the transverse direction, and both coating cavities are coated with insulating coating.

[0009] In an optional embodiment, both ends of the insulating end plate in the transverse direction are flush with the two sides of the two insulating coatings that are opposite to each other in the transverse direction.

[0010] In an optional embodiment, any of the insulating end plates is bonded to the corresponding tooth end wall.

[0011] In an optional embodiment, the insulating coating is an epoxy resin coating.

[0012] In an optional embodiment, the thickness of the insulating coating is between 0.15 mm and 0.2 mm.

[0013] In an optional embodiment, the thickness of the insulating end plate is greater than or equal to the thickness of the insulating coating.

[0014] In optional embodiments, any of the insulating coating layers is attached to two of the insulating end plates respectively at both ends in the longitudinal direction.

[0015] In optional embodiments, the insulating end plates are each provided with a circular arc transition surface at both ends in the transverse direction, any of the circular arc transition surfaces being extended from one side of the insulating end plate close to the tooth portion to the other side away from the tooth portion in the longitudinal direction.

[0016] In optional embodiments, the circular arc transition surface has a central angle of 90°.

[0017] The utility model also provides a motor, including preceding and following motor iron core, the motor iron core includes iron core body and insulating end plate The iron core body has a tooth portion, the tooth portion has two tooth end walls opposite in the longitudinal direction, and two tooth side walls opposite in the transverse direction, two insulating end plates cover two tooth end walls respectively, and two insulating end plates are each correspondingly protruding from two tooth side walls in the transverse direction to form two coating mold cavities on both sides of the tooth portion in the transverse direction, and two coating mold cavities are coated with insulating coating layers.

[0018] Compared with the prior art, the motor iron core provided by the utility model, two insulating end plates cover two tooth end walls of the tooth portion, and two insulating end plates are correspondingly protruding from two tooth side walls of the tooth portion in the transverse direction to form two coating mold cavities. It is equivalent to that two insulating end plates are used as coating mold plates to guide the formation of insulating coating layers in the coating mold cavities, so that the thinning area formed by coating in the corner of the tooth portion is avoided, and the pressure resistance is improved. Moreover, the tooth side wall is coated to obtain an insulating coating layer, and a higher slot fill ratio can be obtained. Therefore, the motor iron core provided by the utility model has the advantages of higher slot fill ratio and pressure resistance. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 Part of the structure schematic diagram of the motor iron core provided by the embodiments of the utility model.

[0021] Figure: 100-motor iron core;110-tooth portion;111-tooth end wall;112-tooth side wall;120-insulating end plate;121-coating mold cavity;122-circular arc transition surface;130-insulating coating layer. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the embodiments of the present invention. It should be understood that the described embodiments are only a portion of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0025] In the description of the present utility model, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present utility model.

[0026] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0027] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood in a broad sense. For example, "connected" can mean 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, or it can be the internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0028] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings.

[0029] Example

[0030] See also Figure 1 , Figure 1 FIG. 1 is a schematic diagram of a partial structure of the motor core 100 provided in this embodiment.

[0031] The motor core 100 provided in this embodiment is applied to a motor and can be either a stator core or a rotor core, which is not specifically limited in this embodiment.

[0032] The motor core 100 includes a core body having a tooth portion 110. The tooth portion 110 includes two longitudinally opposing tooth end walls 111 and two transversely opposing tooth side walls 112. It will be appreciated that the tooth portion 110 is used to separate the winding slots. The core body also includes a yoke and other structures, which are not described further in this embodiment.

[0033] In this embodiment, the longitudinal direction is Figure 1 The direction indicated by the Y arrow is horizontal. Figure 1 The direction indicated by the X arrow.

[0034] The motor core 100 also includes two insulating end plates 120, which are respectively covered on the two tooth end walls 111, and the two insulating end plates 120 each protrude from the two tooth side walls 112 at both ends in the lateral direction to form two coating cavities 121 on both sides of the tooth portion 110 in the lateral direction, and the two coating cavities 121 are both coated with an insulating coating 130.

[0035] It is understood that the lateral dimensions of the insulating end plates 120 are larger than the lateral dimensions of the tooth portion 110. After the two insulating end plates 120 are respectively covered on the two tooth end walls 111, both ends of the two insulating end plates 120 protrude to a certain extent from the sides of the tooth portion 110. In this embodiment, any insulating end plate 120 is bonded to the corresponding tooth end wall 111.

[0036] On either side of the tooth portion 110 in the transverse direction, the two insulating end plates 120 extend beyond the corresponding tooth sidewalls 112 and together with the tooth sidewalls 112, form a transversely concave cavity, namely, the coating cavity 121. It is understood that the insulating end plates 120 are insulating and are injection molded parts in this embodiment.

[0037] The coating cavity 121 guides the coating and molding of the insulating coating 130, which is equivalent to the two insulating end plates 120 serving as both an insulating cover for the tooth end wall 111 and a mold for coating and molding the insulating coating 130 on the tooth side wall 112, thereby avoiding coating at the corner position between the tooth end wall 111 and the tooth side wall 112 to form a thickness reduction area.

[0038] In practical applications, because the tooth sidewalls 112 of the tooth portion 110, which form the winding slots, are coated with an insulation treatment, the thickness of the insulating coating 130 can be kept extremely low, thereby achieving a very high slot fill ratio. Furthermore, due to the constraints of the two insulating end plates 120, the complete coating is avoided, thereby preventing the formation of thinned corners, thereby ensuring the withstand voltage of the motor core 100.

[0039] It is understood that in actual applications, the thickness of the insulating end plate 120 does not affect the slot fill rate. To reduce assembly difficulty, the thickness of the insulating end plate 120 can be larger. In this embodiment, the thickness of the insulating end plate 120 is greater than or equal to the thickness of the insulating coating 130.

[0040] In order to avoid structural mutations on both sides in the lateral direction and prevent adverse effects on winding, in this embodiment, both ends of the insulating end plate 120 in the lateral direction are flush with the two sides of the two insulating coatings 130 that are away from each other in the lateral direction.

[0041] In order to further reduce the adverse effects on winding, in this embodiment, arc transition surfaces 122 are provided at both ends of the insulating end plate 120 in the horizontal direction, and any arc transition surface 122 extends from the side of the insulating end plate 120 close to the tooth portion 110 in the longitudinal direction to the side away from the tooth portion 110.

[0042] It is understandable that the arc transition surface 122 is obtained by rounding the insulating end plate 120. Preferably, the central angle of the arc transition surface 122 in this embodiment is 90°.

[0043] Preferably, the insulating coating 130 in this embodiment is an epoxy resin coating, and the thickness of the insulating coating 130 is between 0.15 mm and 0.2 mm. In other embodiments, the material and thickness of the insulating coating 130 can be adjusted according to actual application conditions.

[0044] To achieve reliable insulation protection, in this embodiment, both longitudinal ends of any insulating coating 130 are respectively attached to the two insulating end plates 120. Since both transverse ends of the insulating end plates 120 are flush with the transversely opposed sides of the two insulating coatings 130, when the insulating coating 130 is applied to the coating cavity 121, it is sufficient to ensure that the coating cavity 121 is completely coated.

[0045] In summary, the motor core 100 provided in this embodiment, on the one hand, because the tooth sidewalls 112 of the teeth 110 that form the winding slots are coated with an insulation treatment, the thickness of the insulating coating 130 can be kept extremely low, thereby achieving an extremely high slot fill factor. On the other hand, due to the constraints of the two insulating end plates 120, complete coating is avoided, thereby preventing the formation of reduced thickness corners, thereby ensuring the withstand voltage of the motor core 100. Therefore, the motor core 100 provided in this embodiment has a higher slot fill factor and withstand voltage.

[0046] In addition, this embodiment further provides a motor, comprising the aforementioned motor core 100. Benefiting from the beneficial effects of the motor core 100, the motor provided in this embodiment also has the characteristics of higher slot fill rate and withstand voltage.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A motor core, characterized in that: The invention comprises an iron core body and an insulating end plate (120); the iron core body has a tooth portion (110); the tooth portion (110) has two tooth end walls (111) opposite to each other in the longitudinal direction, and two tooth side walls (112) opposite to each other in the transverse direction; The two insulating end plates (120) are respectively covered on the two tooth end walls (111), and both ends of the two insulating end plates (120) in the transverse direction are correspondingly protruded from the two tooth side walls (112), so as to form two coating cavities (121) on both sides of the tooth portion (110) in the transverse direction, and the two coating cavities (121) are both coated with an insulating coating (130).

2. The motor core according to claim 1, characterized in that: Both ends of the insulating end plate (120) in the transverse direction are flush with the two sides of the two insulating coatings (130) that are opposite to each other in the transverse direction.

3. The motor core according to claim 1, characterized in that: Any of the insulating end plates (120) is bonded to the corresponding tooth end wall (111).

4. The motor core according to claim 1, characterized in that The insulating coating (130) is an epoxy resin coating.

5. The motor core according to claim 1, characterized in that: The thickness of the insulating coating (130) is between 0.15 mm and 0.2 mm.

6. The motor core according to claim 1, characterized in that The thickness of the insulating end plate (120) is greater than or equal to the thickness of the insulating coating (130).

7. The motor core according to claim 1, characterized in that: Both ends of any of the insulating coatings (130) in the longitudinal direction are respectively attached to the two insulating end plates (120).

8. The motor core according to claim 1, characterized in that: Both ends of the insulating end plate (120) in the transverse direction are provided with arc transition surfaces (122), and any of the arc transition surfaces (122) extends from a side of the insulating end plate (120) close to the tooth portion (110) in the longitudinal direction to a side away from the tooth portion (110).

9. The motor core according to claim 8, characterized in that: The center angle of the arc transition surface (122) is 90°.

10. A motor, characterized in that: The motor core (100) comprises the motor core (100) according to any one of claims 1 to 9.

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