Range hood motor silicon steel plate

Abstract

To provide a silicon steel sheet for a motor of a range hood that improves the problems of the existing motor winding structure, such as high production costs, a tendency to generate vibration noise, and relatively poor magnetic flux stability. [Solution] The range hood motor silicon steel plate (10) includes an outer ring (11), a plurality of first teeth (12), and a plurality of second teeth (13). The plurality of first teeth protrude radially from at least a portion of the inner peripheral surface of the outer ring, and the plurality of second teeth protrude radially from another portion of the inner peripheral surface of the outer ring. The inner peripheral surface of the outer ring includes at least one spaced apart tooth arrangement main edge (111) and at least one tooth arrangement sub-edge (112). By controlling the angles of the main angle (S1) formed by the tooth arrangement main edge and the sub-angle (S2) formed by the tooth arrangement sub-edge, as well as by controlling the dimensions and geometric structure of the first and second teeth, it is possible to significantly reduce the generation of cogging torque and abnormal noise, while also effectively reducing the amount of conductive coil used, thereby lowering production costs and achieving a lighter motor.

Description

[Technical Field]

[0001] The present invention relates to a silicon steel sheet for a motor, and more particularly to a silicon steel sheet for a range hood motor. [Background technology]

[0002] With the significant increase in demand for high efficiency and energy conservation, motors combined with power electronics and control technology have shown advantages in terms of high efficiency and long life, and are attracting more and more attention from the industry.

[0003] A motor is mainly composed of a stator and a rotor. The stator has a coil winding structure and generates a magnetic field when current is applied to drive the rotor. The stator is usually made of multiple laminated silicon steel plates with magnetic conductive properties, and its shape and structure have a significant impact on the overall magnetic distribution design and torque performance.

[0004] In light of this, how to further improve the technical issues that arise from the current existing motor winding structure, such as rising production costs, the tendency to generate vibration and noise, and deterioration of magnetic flux stability, has become a goal that is highly desired for development in related fields. Summary of the Invention [Problem to be solved by the invention]

[0005] To further improve the technical issues of the current existing motor winding structure, such as high production costs, a tendency to generate vibration noise, and relatively poor magnetic flux stability, the present invention provides a silicon steel sheet for range hood motors. [Means for solving the problem]

[0006] The motor silicon steel plate of the range hood provided by the present invention includes an outer ring portion, a plurality of first teeth, and a plurality of second teeth, the plurality of first teeth protruding radially from at least a portion of the inner circumferential surface of the outer ring portion, and the plurality of second teeth protruding radially from another portion of the inner circumferential surface of the outer ring portion, the inner circumferential surface of the outer ring portion including at least one tooth arrangement major edge and at least one tooth arrangement minor edge spaced apart, each of the first teeth corresponding to the tooth arrangement major edge, each of the second teeth corresponding to the tooth arrangement minor edge, a notch formed between adjacent first teeth and second teeth, the first teeth, the second teeth, and the inner circumferential surface of the outer ring portion forming a winding space, the notch being used for allowing a conductive coil to enter the winding space and wind the first teeth and the second teeth.

[0007] In the silicon steel plate for the motor of the range hood of the present invention, the length of the first tooth is 12 to 14 mm, and the length of the second tooth is 15 to 18 mm.

[0008] In the silicon steel plate for the motor of the range hood of the present invention, the width of the first tooth is 6 to 9 mm, and the width of the second tooth is 6 to 9 mm.

[0009] In the range hood motor silicon steel plate of the present invention, the two end points of the tooth arrangement main side and the geometric center of the range hood motor silicon steel plate form a main included angle; The two end points of the tooth arrangement minor side and the geometric center of the motor silicon steel plate of the range hood form a minor included angle.

[0010] In the motor silicon steel plate of the range hood of the present invention, the primary sandwiching angle is 40 to 50 degrees, and the secondary sandwiching angle is 40 to 50 degrees.

[0011] In the silicon steel plate for the motor of the range hood of the present invention, the first tooth includes a main magnetic pole portion, and the main magnetic pole portion is located at one end of the first tooth protruding toward the geometric center; The second tooth includes a secondary magnetic pole portion, and the secondary magnetic pole portion is disposed at one end of the second tooth that protrudes toward the geometric center.

[0012] Furthermore, both side ends of the main magnetic pole adopt a circular arc contour, and / or both side ends of the sub-magnetic pole adopt a structural design of a cut-shaped contour.

[0013] In the motor silicon steel plate of the range hood of the present invention, a main magnetic pole angle is formed by the two end points of the main magnetic pole portion and the geometric center of the motor silicon steel plate of the range hood, A sub-magnetic pole angle is formed between the two end points of the sub-magnetic pole portion and the geometric center of the motor silicon steel plate of the range hood.

[0014] In the silicon steel plate of the motor of the range hood of the present invention, the angle of the main magnetic pole sandwiching angle is smaller than the angle of the main sandwiching angle; The angle of the secondary magnetic pole sandwiching angle is smaller than the angle of the secondary magnetic pole sandwiching angle.

[0015] Furthermore, the angle of the main pole sandwiching angle is smaller than the angle of the main sandwiching angle by 0.5 to 2 degrees, The angle of the auxiliary magnetic pole sandwiched between the magnetic poles is smaller than the angle of the auxiliary sandwiched between the magnetic poles by 0.5 to 2 degrees.

[0016] In the range hood motor silicon steel plate of the present invention, the thickness of the range hood motor silicon steel plate is 5 to 50 mm.

[0017] In the range hood motor silicon steel sheet of the present invention, the winding space includes a main winding space and a sub-winding space, and the spatial dimensions of the main winding space and the sub-winding space are defined as the distance from the notch to one end point of either the main tooth arrangement edge or the sub-tooth arrangement edge, and correspond to the area adjacent to the first tooth or the second tooth, respectively. [Effects of the Invention]

[0018] As can be seen from the above description, the present invention has the following advantages: 1. By controlling the angles of the major and minor sandwiching angles and the dimensions of the first and second teeth, an asymmetric winding space is formed, and by controlling the wire diameter and winding density of the conductive coil, an asymmetric magnetic flux distribution is generated, which not only significantly reduces cogging torque but also effectively reduces the amount of conductive coil used, thereby reducing production costs and achieving a lightweight motor. 2. The main magnetic pole part and the sub-magnetic pole part have different geometric shapes at both ends (e.g., the main magnetic pole part adopts an arc contour design, and the sub-magnetic pole part adopts a cut-shape contour design), which forms a magnetic bias (i.e., a differential distribution of magnetic lines) between the main magnetic pole part and the sub-magnetic pole part, thereby effectively reducing the cogging torque and vibration noise of the motor, and reducing eddy current loss and local heat loss due to magnetic saturation of the second tooth. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a top view of a preferred embodiment of a silicon steel plate for a motor of a range hood according to the present invention; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0020] In order to more clearly explain the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of each embodiment. It is clearly understood that the accompanying drawings in the following description are only some examples or embodiments of the present invention, and those skilled in the art can also apply the present invention to other similar situations based on these accompanying drawings without any creative efforts. Unless it is clear from the language environment or otherwise described, the same symbols in the drawings represent the same structures or operations.

[0021] As used herein and in the claims, unless the context clearly indicates otherwise, words such as "a," "one," "one," "a kind," or "the" do not specify the singular but can also include the plural. In general, the terms "including" and "including" only indicate the inclusion of explicitly labeled steps and elements, and do not constitute an exclusive list of steps and elements, and the method or apparatus may include other steps or elements.

[0022] Please refer to Figure 1. Figure 1 is a top view of a preferred embodiment of a range hood motor silicon steel plate 10 provided by the present invention. The range hood motor silicon steel plate 10 includes an outer ring portion 11, a plurality of first teeth 12, and a plurality of second teeth 13. The present invention can further form a motor stator by laminating a plurality of the range hood motor silicon steel plates 10, and the range hood motor silicon steel plates 10 have a thickness of between 0.1 and 1 millimeter (mm).

[0023] The plurality of first teeth 12 are integrally formed and protrude radially from at least a portion of the inner circumferential surface of the outer ring portion 11. The plurality of second teeth 13 are also integrally formed and protrude radially from another portion of the inner circumferential surface of the outer ring portion 11. The first teeth 12 and the second teeth 13 are alternately arranged at intervals. Both sides of the first teeth 12 are adjacent to the second teeth 13, and both sides of the second teeth 13 are adjacent to the first teeth 12.

[0024] Here, the length of the first teeth 12 is 12 to 14 mm, and the length of the second teeth 13 is 15 to 18 mm.

[0025] Here, the width of the first teeth 12 is 6 to 9 mm, and the width of the second teeth 13 is 6 to 9 mm.

[0026] Here, the first shape of the outer contour defined by the outer peripheral surface of the outer ring portion 11 may be a geometric shape such as, but not limited to, a polygon, a circle, or a near-circle. In this embodiment, the first shape is a near-octagon, and at least a portion of the outer peripheral surface is designed with a smooth transition or a small bend angle. This allows the smaller bend angle on the outer peripheral surface to disperse stress concentration that may occur at sharp angles during the stamping or lamination process, and further effectively reduce the generation of burrs. Furthermore, it is possible to prevent scratches on the motor silicon steel plate 10 of the range hood during lamination, which may cause the motor stator S to generate abnormal noise and vibration during motor operation and reduce the service life of the motor.

[0027] Here, the second shape of the inner contour defined by the inner peripheral surface of the outer ring portion 11 includes, but is not limited to, geometric shapes such as a polygon, a circle, or a near-circle, and the geometric shapes of the second shape and the first shape may be the same or different. In this embodiment, the second shape is a near-octagon corresponding to the first shape.

[0028] Here, the inner contour includes at least one tooth arrangement major edge 111 and / or at least one tooth arrangement minor edge 112 arranged and disposed.

[0029] In this embodiment, the length of the tooth arrangement main side 111 is greater than the length of the tooth arrangement minor side 112 .

[0030] Here, each of the first teeth 12 is arranged corresponding to each of the tooth arrangement main edges 111, each of the second teeth 13 is arranged corresponding to each of the tooth arrangement sub-edges 112, and each of the first teeth 12 and each of the second teeth 13 are arranged alternately in sequence along the inner circumferential surface of the outer ring portion 11.

[0031] Furthermore, the second shape of the "quasi-octagon" described in the present invention is alternately configured by tooth arrangement main edges 111 with four levels of linear extension and tooth arrangement minor edges 112 with four levels of transition angle, in other words, the tooth arrangement main edges 111 and the tooth arrangement minor edges 112 are arranged side by side at intervals to form the inner contour.

[0032] Here, a main angle S1 is formed by the two end points of the tooth arrangement main edge 111 and the geometric center of the motor silicon steel plate 10 of the range hood; in other words, the main angle S1 is an angle formed by the geometric center corresponding to the two end points of the tooth arrangement main edge 111.

[0033] Here, the main included angle S1 is 40 to 50 degrees.

[0034] Here, a secondary angle S2 is formed by the two end points of the tooth arrangement secondary edge 112 and the geometric center of the motor silicon steel plate 10 of the range hood. In other words, the secondary angle S2 is an angle formed by the geometric center corresponding to the two end points of the tooth arrangement secondary edge 112.

[0035] Here, the secondary included angle S2 is between 40 and 50 degrees.

[0036] Preferably, the major included angle S1 is about 46 degrees, and the minor included angle S2 is about 42 degrees.

[0037] Preferably, the first tooth 12 is located corresponding to the first midpoint of the tooth arrangement main side 111, i.e., the angles formed by the first midpoint and the two end points of the tooth arrangement main side 111 with respect to the geometric center are equal, and the second tooth 13 is located corresponding to the second midpoint of the tooth arrangement minor side 112, i.e., the angles formed by the second midpoint and the two end points of the tooth arrangement minor side 112 with respect to the geometric center are equal, which helps to guide magnetic flux evenly on both sides of the tooth body of each of the first tooth 12 or each of the second tooth 13, and reduces the potential risk of magnetic saturation or magnetic hysteresis loss.

[0038] Here, each of the first teeth 12 includes a main magnetic pole portion 121, which is installed at one end of the first tooth 12 protruding toward the geometric center, and in this embodiment, the main magnetic pole portion 121 is a wing-shaped magnetic pole portion.

[0039] Here, a main pole angle M1 is formed by the two end points of the main pole portion 121 and the geometric center of the motor silicon steel plate 10 of the range hood, and the main pole angle M1 and the main angle S1 are approximately equal, and preferably, the main pole angle M1 is 0.5 to 2 degrees smaller than the main angle S1.

[0040] Here, each of the second teeth 13 includes a sub-magnetic pole portion 131, which is installed at one end of the second tooth 13 protruding toward the geometric center, and in this embodiment, the sub-magnetic pole portion 131 is also a wing-shaped magnetic pole portion.

[0041] Here, a sub-pole angle M2 is formed by the two end points of the sub-pole portion 131 and the geometric center of the motor silicon steel plate 10 of the range hood, and the angles of the sub-pole angle M2 and the sub-angle S2 are approximately equal, and preferably, the angle of the sub-pole angle M2 is 0.5 to 2 degrees smaller than the angle of the sub-angle S2.

[0042] Here, the wing-shaped magnetic pole portion described in this invention refers to a magnetic pole portion (i.e., the main magnetic pole portion 121 or the sub-magnetic pole portion 131) that extends symmetrically in an arc on both sides from the tooth body of the tooth portion (the first tooth 12 or the second tooth 13 corresponding to the magnetic pole portion) to form a wing-shaped end portion.

[0043] Preferably, both side ends of the main magnetic pole portion 121 adopt a circular arc contour, and / or both side ends of the sub-magnetic pole portion 131 adopt a structural design of a cut-shaped contour, thereby forming a magnetic bias (i.e., a differential distribution of magnetic lines of force) between the main magnetic pole portion 121 and the sub-magnetic pole portion 131, thereby effectively reducing the cogging torque and vibration noise of the motor, and reducing eddy current loss and local heat loss due to magnetic saturation of the second tooth 13.

[0044] Here, the main magnetic pole portion 121 and the auxiliary magnetic pole portion 131 correspond to the first tooth 12 and the second tooth 13, respectively, and are arranged adjacent to and spaced apart along the inner surface of the outer ring portion 11, forming a regular magnetic pole distribution arrangement, and each of the magnetic pole portions (i.e., each of the main magnetic pole portions 121 and the auxiliary magnetic pole portions 131) are arranged to surround each other to form an approximately circular hollow area, which can accommodate a motor rotor, and the motor rotor is driven by the alternating magnetic pole changes of the first tooth 12 and the second tooth 13, and operates with the geometric center of the motor silicon steel plate 10 of the range hood as its center of rotation.

[0045] Here, a notch A is formed between the adjacent main magnetic pole portion 121 and the adjacent sub-magnetic pole portion 131, and the notch A allows a conductive coil to enter and perform winding work on the first tooth 12 and the second tooth 13, and preferably, the opening width of each notch is equal.

[0046] Here, adjacent tooth portions (i.e., between the adjacent first tooth 12 and the adjacent second tooth 13) and the inner peripheral surface of the outer ring portion 11 jointly define a boundary to form a winding space P, and the winding space P includes a main winding space P1 adjacent to the first tooth 12 and a sub-winding space P2 adjacent to the second tooth 13, and the main winding space P1 and the sub-winding space P2 are defined by a boundary connecting the notch A and an end point of the tooth arrangement main edge 111 (or the tooth arrangement sub-edge 112). Specifically, the spatial dimensions of the main winding space P1 and the sub-winding space P2 are defined from the notch A to the end point of the arrangement edge, and correspond to the location area adjacent to the first tooth 12 or the second tooth 13, respectively.

[0047] Therefore, the present invention forms an asymmetric winding space P (i.e., a difference in the spatial dimensions between the main winding space P1 and the sub winding space P2) and a magnetic line distribution by controlling the angles of the main and sub-angles S1 and S2, controlling the dimensions of the first and second teeth 12 and 13, and fine-tuning the geometric shapes of the main magnetic pole portion 121 and the sub-magnetic pole portion 131, and further achieves the following effects: 1. The main winding space P1 is narrower than the sub-winding space P2, and the first tooth 12 can accommodate a smaller number of turns of the conductive coil. By controlling the wire diameter and winding density of the conductive coil, an asymmetric magnetic flux distribution can be generated, which not only significantly reduces cogging torque but also effectively reduces the amount of conductive coil used, thereby reducing production costs and achieving a lightweight motor. 2. Due to the geometrically different design of both side ends of the main magnetic pole portion 121 and the sub-magnetic pole portion 131 (e.g., the main magnetic pole portion 121 adopts a circular arc contour design, and the sub-magnetic pole portion 131 adopts a cut-shape contour design), a magnetic bias (i.e., a differential distribution of magnetic lines) is formed between the main magnetic pole portion 121 and the sub-magnetic pole portion 131, thereby effectively reducing the cogging torque and vibration noise of the motor, and reducing eddy current loss and local heat loss due to magnetic saturation of the second tooth 13.

[0048] It should be noted that, based on the interpretation and explanation of the above specification, those skilled in the art may make further changes and modifications to the above-described implementation modes. Therefore, the present invention is not limited to the specific implementation modes disclosed above, and some equivalent modifications and variations to the present invention should also fall within the scope of protection of the claims of the present invention. Furthermore, although the present specification uses some specific terms, these terms are for the convenience of description and do not constitute any limitations on the present invention. [Explanation of symbols]

[0049] 10 Range hood motor silicon steel plate 11 Outer ring 111 Tooth placement main side 112 Tooth placement minor side 12 First tooth 121 Main magnetic pole section 13 Second tooth 131 Sub magnetic pole part A Notch M1 Main magnetic angle M2 Sub-magnetic angle P Winding space P1 Main winding space P2 Sub-winding space S1 Main angle S2 Minor angle

Claims

1. A silicon steel plate for a range hood motor, comprising an outer ring portion, a plurality of first teeth and a plurality of second teeth, wherein the plurality of first teeth protrude radially from at least a portion of the inner surface of the outer ring portion, and the plurality of second teeth protrude radially from another portion of the inner surface of the outer ring portion, and the length of the first teeth is shorter than the length of the second teeth.

2. the plurality of first teeth are provided to protrude radially from at least a portion of the inner circumferential surface of the outer ring portion, the length of the first teeth is 12 to 14 mm, and the width of the first teeth is 6 to 9 mm; the second teeth are provided to protrude radially from other portions of the inner circumferential surface of the outer ring portion, the length of the second teeth is 15 to 18 mm, and the width of the second teeth is 6 to 9 mm; the inner peripheral surface of the outer ring portion includes at least one tooth arrangement major edge and at least one tooth arrangement minor edge that are spaced apart, Each of the first teeth is disposed corresponding to the tooth arrangement main side, Each of the second teeth is disposed corresponding to the tooth arrangement minor side, a notch is formed between the adjacent first tooth and the adjacent second tooth; 2. The range hood motor silicon steel plate according to claim 1, wherein the first teeth, the second teeth, and the inner peripheral surface of the outer ring portion form a winding space, and the cutouts are used to allow a conductive coil to enter the winding space and wind the first teeth and the second teeth.

3. The two end points of the tooth arrangement main side and the geometric center of the motor silicon steel plate of the range hood form a main included angle, 3. The motor silicon steel plate for a range hood according to claim 2, wherein two end points of the tooth arrangement minor side and a geometric center of the motor silicon steel plate for a range hood form a minor included angle.

4. 4. The range hood motor silicon steel plate according to claim 3, wherein the primary sandwiching angle is 40 to 50 degrees, and the secondary sandwiching angle is 40 to 50 degrees.

5. the first tooth includes a main magnetic pole portion, and the main magnetic pole portion is disposed at one end of the first tooth that protrudes toward the geometric center, 4. The silicon steel plate for a motor of a range hood according to claim 3, wherein the second tooth includes a secondary magnetic pole portion, and the secondary magnetic pole portion is provided at one end of the second tooth that protrudes toward the geometric center.

6. The silicon steel plate for a motor of a range hood according to claim 5, wherein both ends of the main magnetic pole portion adopt a circular arc contour, and / or both ends of the sub-magnetic pole portion adopt a structural design of a cut-shaped contour.

7. a main magnetic pole sandwiching angle is formed by two end points of the main magnetic pole portion and the geometric center of the motor silicon steel plate of the range hood, 6. The motor silicon steel plate for a range hood according to claim 5, wherein a sub-magnetic pole angle is formed between two end points of the sub-magnetic pole portion and the geometric center of the motor silicon steel plate for the range hood.

8. The main pole angle is smaller than the main pole angle, The silicon steel plate for a motor of a range hood according to claim 7, wherein the angle of the secondary magnetic pole sandwiched between the magnetic poles is smaller than the angle of the secondary magnetic pole sandwiched between the magnetic poles.

9. the main pole sandwiching angle is 0.5 to 2 degrees smaller than the main sandwiching angle, 9. The range hood motor silicon steel plate according to claim 8, wherein the angle of the auxiliary magnetic pole sandwiched angle is smaller than the angle of the auxiliary sandwiched angle by 0.5 to 2 degrees.

10. The range hood motor silicon steel plate according to any one of claims 1 to 9, wherein the range hood motor silicon steel plate has a thickness of 5 to 50 mm.

11. 10. The range hood motor silicon steel sheet according to claim 2, wherein the winding space includes a main winding space and a sub-winding space, and spatial dimensions of the main winding space and the sub-winding space are defined as distances from the notch to one end point of either the tooth arrangement main side or the tooth arrangement sub-side, and correspond to areas adjacent to the first tooth or the second tooth, respectively.

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