Motor stator winding structure

Abstract

Disclosed is a motor stator winding structure, comprising a stator assembly (1) and a plurality of windings (2). The stator assembly (1) comprises a plurality of single-tooth stators (1A, 1B, 1C) arranged in a circle. Each single-tooth stator (1A, 1B, 1C) comprises a head (11), a base (12), and a body (13). The base (12) comprises a plurality of wire supports arranged at fixed intervals, and the heights of the plurality of wire supports are not exactly equal. The body (13) is connected between the head (11) and the base (12). The plurality of bases (12) are connected to one another, and the plurality of heads (11) and the plurality of bodies (13) extend toward the center of the circle. The plurality of windings (2) are wound around the plurality of bodies (13). The plurality of single-tooth stators (1A, 1B, 1C) are separated from one another and arranged in a circle before being connected to one another, a fixed gap is formed between every two adjacent single-tooth stators (1A, 1B, 1C), the fixed gap is used for a guide pin to pass through, and the guide pin is used for guiding each winding to be wound around the plurality of bodies (13) of the plurality of single-tooth stators (1A, 1B, 1C), so that the effect of controlling the length of the dangling wire between every two adjacent single-tooth stators to be the shortest can be achieved.

Description

Motor stator winding structure Technical Field

[0001] The present invention relates to a motor stator winding structure, and in particular to a motor stator winding structure capable of improving a winding slot full rate. Background Art

[0002] The performance of an electric motor (also known as a motor) is largely determined by the number of coil windings within the motor's stator slots. Slot fill factor is generally used as a benchmark for measuring motor efficiency. Slot fill factor is the ratio of metal conductors (such as copper wire) to the available space within the stator slots. Increasing the number of coil windings within the stator slots, and thus the slot fill factor, increases motor power.

[0003] Conventional motor stator winding methods, used to increase slot fill rates, use either a single-tooth single winding method or a linear array single-tooth winding method to reserve space for winding guide pins. However, these conventional winding methods make it difficult to control the slack length between adjacent single-tooth stators. Excessive slack lengths can hinder the number of coil windings and increase impedance.

[0004] Therefore, how to overcome the above-mentioned defects through improvement of structural design has become one of the important issues to be solved in this field.

[0005] Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a motor stator winding structure to address the deficiencies of the prior art.

[0007] In order to solve the above-mentioned technical problems, one of the technical solutions adopted by the present invention is to provide a motor stator winding structure, which includes a stator assembly and a plurality of windings. The stator assembly includes a plurality of single-tooth stators arranged in a circle. Each single-tooth stator includes a head, a base and a main body. The base includes a plurality of wire racks arranged at fixed intervals, and the heights of the plurality of wire racks are not completely equal. The main body is connected between the head and the base. The plurality of bases are connected to each other, and the plurality of heads and the plurality of main bodies extend toward the center of the circle. The plurality of windings are wound around the plurality of main bodies. Before the plurality of single-tooth stators are connected to each other, they are separated from each other and arranged in a circle. There is a fixed gap between two adjacent single-tooth stators. The fixed gap is used for a guide needle to pass through, and the guide needle is used to guide each winding to be wound around the plurality of main bodies.

[0008] One of the beneficial effects of the present invention is that the motor stator winding structure provided by the present invention can be achieved through the technical solution of "multiple single-tooth stators are separated from each other and arranged in a circle before being connected to each other, with a fixed gap between two adjacent single-tooth stators, the fixed gap is used for a guide pin to pass through, and the guide pin is used to guide each winding to be wound around the multiple main body parts." By utilizing the path concept of concentric circles, the multiple single-tooth stators are synchronously expanded outward to make room for the guide pins for winding, ensuring that the guide pin space can be minimized, and thereby the sluggish wire length between two adjacent single-tooth stators is controlled to be minimum.

[0009] To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only for reference and illustration and are not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] FIG1 is a perspective schematic diagram of a motor stator winding structure according to an embodiment of the present invention.

[0011] FIG. 2 is a perspective schematic diagram of a stator assembly in a motor stator winding structure according to an embodiment of the present invention.

[0012] FIG. 3 is an exploded schematic diagram of a stator assembly in a motor stator winding structure according to an embodiment of the present invention.

[0013] FIG. 4 is a schematic diagram of first and second single-tooth stators in a motor stator winding structure according to an embodiment of the present invention.

[0014] FIG5 is a schematic front view of a second single-tooth stator in the motor stator winding structure according to an embodiment of the present invention.

[0015] FIG. 6 is a schematic diagram of a third single-tooth stator in the motor stator winding structure according to an embodiment of the present invention.

[0016] FIG. 7 is a schematic front view of a third single-tooth stator in the motor stator winding structure according to an embodiment of the present invention.

[0017] FIG8 is a schematic diagram of the first to third single-tooth stators in the motor stator winding structure after winding according to an embodiment of the present invention.

[0018] FIG9 is a schematic front view of a guide needle according to an embodiment of the present invention.

[0019] FIG10 is a schematic diagram of a guide needle according to an embodiment of the present invention.

[0020] FIG. 11 is an exploded schematic diagram of a motor stator winding structure and a circuit board according to an embodiment of the present invention.

[0021] FIG. 12 is a schematic diagram of a motor stator winding structure connected to an external circuit board according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The following is an explanation of the implementation of the "motor stator winding structure" disclosed in the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations and are not depicted according to actual dimensions. Please note in advance. The following embodiments will further explain the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the scope of protection of the present invention.

[0023] It should be understood that although terms such as "first," "second," and "third" may be used herein to describe various components, these components should not be limited by these terms. These terms are primarily used to distinguish one component from another. In addition, the term "or" as used herein may include any one or more combinations of the associated listed items, depending on the actual situation.

[0024] Example

[0025] Referring to Figures 1 to 3, Figure 1 is a perspective schematic diagram of a motor stator winding structure according to an embodiment of the present invention, Figure 2 is a perspective schematic diagram of a stator assembly in the motor stator winding structure according to an embodiment of the present invention, and Figure 3 is an exploded schematic diagram of a stator assembly in the motor stator winding structure according to an embodiment of the present invention. An embodiment of the present invention provides a motor stator winding structure M, which includes a stator assembly 1 and a plurality of windings 2. As shown in Figure 2, the stator assembly 1 includes a plurality of single-tooth stators (a first single-tooth stator 1A, a second single-tooth stator 1B, a third single-tooth stator 1C... etc.) arranged in a circle, and the plurality of single-tooth stators are detachably connected to each other. Each single-tooth stator has a plurality of windings 2 wound thereon. The present invention is not limited to the specific number of windings 2.

[0026] Referring to Figures 2 and 4, Figure 4 is a schematic diagram of the first and second single-tooth stators in the motor stator winding structure according to an embodiment of the present invention. Each single-tooth stator (taking the first single-tooth stator 1A as an example) comprises a head portion 11, a base portion 12, and a body portion 13. The body portion 13 is connected between the head portion 11 and the base portion 12. Multiple base portions 12 are interconnected, forming a circular stator assembly 1 with multiple single-tooth stators. Furthermore, the multiple heads 11 and the multiple bodies 13 extend toward the center of the circle.

[0027] Specifically, the base 12 includes a plurality of lead frames arranged at regular intervals. As shown in FIG4 , the base 12 of the first single-tooth stator 1A includes a first lead frame 121, a second lead frame 122, and a third lead frame 123. The second lead frame 122 is disposed between the first and third lead frames 121, 123 and has a convex U-shaped shape. Furthermore, a screw hole V is defined at the top of the second lead frame 122.

[0028] Continuing with FIG4 , the base 12 of the second single-tooth stator 1B includes a fourth lead frame 124, a fifth lead frame 125, and a sixth lead frame 126. The fifth lead frame 125 is disposed between the fourth lead frame 124 and the sixth lead frame 126. The second single-tooth stator 1B is adjacent to the first single-tooth stator 1A, with the fourth lead frame 124 being closer to the first single-tooth stator 1A than the sixth lead frame 126. Furthermore, the fifth lead frame has a rounded corner Q formed on one side adjacent to the sixth lead frame.

[0029] Specifically, each single-tooth stator, such as the first single-tooth stator 1A or the second single-tooth stator 1B in FIG4 , has a first connecting portion 1201 on the left side of the base 12 and a second connecting portion 1202 on the right side of the base 12. For example, the first connecting portion 1201 is a slot, and the second connecting portion 1202 is a rib, but the present invention is not limited thereto. Thus, the second connecting portion 1202 on the right side of the base 12 of the first single-tooth stator 1A is secured to the first connecting portion 1201 on the left side of the base 12 of the second single-tooth stator 1B, thereby securing the second single-tooth stator 1B to the first single-tooth stator 1A.

[0030] Next, refer to Figure 5, which is a schematic front view of a second single-tooth stator in a motor stator winding structure according to an embodiment of the present invention. As shown in Figure 5, the height of the fifth lead frame 125 is greater than that of the fourth lead frame 124 and the sixth lead frame 126. Specifically, there is a height difference H between the fifth lead frame 125 and the fourth and sixth lead frames 124 and 126. This height difference H is at least twice the maximum diameter of the winding 2.

[0031] Referring to Figures 2 and 6, Figure 6 is a schematic diagram of the third single-tooth stator in the motor stator winding structure according to an embodiment of the present invention. The third single-tooth stator 1C is adjacent to the second single-tooth stator 1B, which is connected between the first single-tooth stator 1A and the third single-tooth stator 1C. The base 12 of the third single-tooth stator 1C includes a seventh lead frame 127, an eighth lead frame 128, and a ninth lead frame 129. The eighth lead frame 128 is disposed between the seventh lead frame 127 and the ninth lead frame 129, with the seventh lead frame 127 being closer to the second single-tooth stator 1B than the ninth lead frame 129. Furthermore, the eighth lead frame 128 has a rounded corner Q formed on one side adjacent to the ninth lead frame 129.

[0032] Similarly, each third single-tooth stator 1C in FIG6 has a first connection portion 1201 on the left side of the base 12 and a second connection portion 1202 on the right side of the base 12. Therefore, the second connection portion 1202 on the right side of the base 12 of one third single-tooth stator 1C is engaged with the first connection portion 1201 on the left side of the base 12 of another third single-tooth stator 1C, thereby securely connecting the two third single-tooth stators 1C.

[0033] Next, refer to Figure 7, which is a schematic front view of a third single-tooth stator in a motor stator winding structure according to an embodiment of the present invention. As shown in Figure 7, the height of the eighth lead frame 128 is smaller than that of the seventh lead frame 127 and the ninth lead frame 129. Specifically, there is also a height difference H between the eighth lead frame 128 and the seventh and ninth lead frames 127 and 129. This height difference H is at least twice the maximum diameter of the winding 2.

[0034] Referring to Figures 2, 3, and 8, Figure 3 is an exploded schematic diagram of the stator assembly in the motor stator winding structure according to an embodiment of the present invention. Before being connected to one another, the multiple single-tooth stators can be simultaneously expanded outward from the connection configuration shown in Figure 2 to form the configuration shown in Figure 3, that is, separated from one another and arranged in a circle. A fixed gap G is defined between two adjacent single-tooth stators (e.g., between the first single-tooth stator 1A and the second single-tooth stator 1B, between the second single-tooth stator 1B and the third single-tooth stator 1C, and between the first single-tooth stator 1A and the third single-tooth stator 1C). The fixed gap G allows a guide pin 3 to pass through and guide each winding 2 around at least one main body portion 13. By expanding the multiple single-tooth stators concentrically, the fixed gap G between two adjacent single-tooth stators can be maintained at a minimum. When the fixed gap G is maintained at a minimum, the length of the winding 2 retained in the fixed gap G (i.e., the stagnation length) when the winding is continuously wound around two single-tooth stators can also be reduced. In other words, by the concentric circle expansion method of the above-mentioned multiple single-tooth stators, the hysteresis line length between two single-tooth stators can be controlled to be within the shortest range.

[0035] Referring to Figures 8 to 10 , Figure 9 is a schematic front view of a guide pin according to an embodiment of the present invention, and Figure 10 is a schematic diagram of a guide pin according to an embodiment of the present invention. For example, the guide pin 3 can be a rectangular guide pin having a guide pin hole 30 . The winding wire 2 can be inserted into the guide pin hole 30 , allowing the guide pin 3 to guide the winding wire 2 through the fixed gap G and be wound around the main body 13 of the single-tooth stator. Specifically, the fixed gap G satisfies the following relationship:

[0036] in, The diameter of winding 2 The maximum value (i.e., the width of the guide pin hole 30). T is the minimum thickness of the guide pin 3, which is greater than or equal to 0.5 mm. D is the safety distance between the guide pin 3 and the adjacent single-tooth stator, which is greater than or equal to 1 mm.

[0037] The guide pin 3 can wind the wire 2 around each single-tooth stator in different winding directions. For example, as shown in Figure 4 , the first single-tooth stator 1A is the starting point for winding 2. The wire 2 will move from the outside of the first single-tooth stator 1A to the inside of the second single-tooth stator 1B. When the guide pin 3 winds the wire 2 around the main body 13 of the second single-tooth stator 1B in a counterclockwise winding direction, it first guides the wire 2 to the right of the fifth lead frame 125, that is, through the gap between the fifth lead frame 125 and the sixth lead frame 126 (see winding direction S1 in Figure 4 ). It then continues to guide the wire 2 counterclockwise around the main body 13. Because the fifth lead frame 125 of the second single-tooth stator 1B is taller than the sixth lead frame 126, with the height difference being at least twice the maximum diameter of the winding 2, the guide pin 3 can follow the fifth lead frame 125 and hook the winding 2 onto the upper portion of the fifth lead frame 125, allowing the winding 2 to be placed into the designated slot (i.e., the space formed by the fixed gap G between two adjacent single-tooth stators) while maintaining its original tension. Furthermore, the rounded corners Q of the fifth lead frame 125 prevent the winding 2 from excessively bending against the fifth lead frame 125, which could lead to uneven tension.

[0038] On the other hand, for example, as shown in FIG6 , when the guide pin 3 is winding the winding wire 2 around the main body 13 of one of the third single-tooth stators 1C in a clockwise winding direction, the guide pin 3 can first guide the winding wire 2 to the left of the eighth lead frame 128, that is, through the gap between the eighth lead frame 128 and the seventh lead frame 127 (see winding direction S2 in FIG6 ), and then continue to guide the winding wire 2 around the main body 13 in a clockwise direction. Therefore, by designing that the seventh lead frame 127 of the third single-tooth stator 1C is higher than the eighth lead frame 128, and the height difference is at least twice the maximum wire diameter of the winding wire 2, the guide pin 3 can hook the winding wire 2 onto the upper portion of the seventh lead frame 127, allowing the winding wire 2 to be placed into the designated slot while maintaining its original tension.

[0039] Referring to Figures 11 and 12 , Figure 11 is an exploded schematic diagram of a motor stator winding structure and a circuit board according to an embodiment of the present invention, and Figure 12 is a schematic diagram of a motor stator winding structure connected to a circuit board according to an embodiment of the present invention. The motor stator winding structure M provided by the present invention is capable of being connected to an external circuit board P. Circuit board P has a plurality of through-holes P0, each corresponding to a plurality of screw holes V on a plurality of second lead frames 122. Therefore, a plurality of screws R can be inserted through the plurality of through-holes P0 and into the plurality of screw holes V to secure circuit board P to the motor stator winding structure M. Furthermore, as shown in Figure 10 , circuit board P can also be connected to a three-phase power line E.

[0040] Advantageous Effects of the Embodiments

[0041] One of the beneficial effects of the present invention is that the motor stator winding structure M provided by the present invention can separate a plurality of single-tooth stators from each other and arrange them in a circle before they are connected to each other by means of concentric circle expansion. As a result, the fixed gap between two adjacent single-tooth stators can be maintained in a minimum range, thereby minimizing the guide pin space. Furthermore, when the fixed gap G is maintained in a minimum range, the length of the wire (i.e., the stagnation length) retained by the winding 2 in the fixed gap G when it is continuously wound around two single-tooth stators can also be reduced. Therefore, through the above-mentioned concentric circle expansion method of the plurality of single-tooth stators, the stagnation length between the two single-tooth stators can be controlled in the shortest range, thereby maximizing the number of coil windings of the motor stator and improving the motor efficiency.

[0042] The contents disclosed above are only preferred feasible embodiments of the present invention and do not limit the scope of protection of the claims of the present invention. Therefore, all equivalent technical changes made using the contents of the description and drawings of the present invention are included in the scope of protection of the claims of the present invention.

Claims

1. A motor stator winding structure, characterized in that: The motor stator winding structure includes: A stator assembly includes a plurality of single-tooth stators arranged in a circle, each of the single-tooth stators including: a head; a base comprising a plurality of lead frames arranged at regular intervals; and a main body connected between the head and the base; wherein the plurality of bases are connected to each other, and the plurality of heads and the plurality of body parts extend toward the center of the circle; and A plurality of winding wires, wound around the plurality of the main bodies; Before being connected to each other, the plurality of single-tooth stators are separated from each other and arranged in a circle. There is a fixed gap between two adjacent single-tooth stators. The fixed gap is used for a guide needle to pass through. The guide needle is used to guide each winding to be wound around at least one of the main body parts.

2. The motor stator winding structure according to claim 1, characterized in that: The plurality of single-tooth stators include a first single-tooth stator, the base of the first single-tooth stator includes a first lead frame, a second lead frame and a third lead frame, the second lead frame is disposed between the first lead frame and the third lead frame, and the second lead frame is in a convex shape.

3. The motor stator winding structure according to claim 2, characterized in that: The top of the second lead frame is provided with a screw hole.

4. The motor stator winding structure according to claim 2, characterized in that: The plurality of single-tooth stators include a second single-tooth stator adjacent to the first single-tooth stator. The base of the second single-tooth stator includes a fourth lead frame, a fifth lead frame, and a sixth lead frame. The fifth lead frame is disposed between the fourth lead frame and the sixth lead frame. The fourth lead frame is closer to the first single-tooth stator than the sixth lead frame. The fifth lead frame is taller than the fourth and sixth lead frames.

5. The motor stator winding structure according to claim 4, characterized in that: There is a height difference between the fifth lead frame and the fourth lead frame and the sixth lead frame, and the height difference is at least one times the maximum wire diameter of the winding wire.

6. The motor stator winding structure according to claim 4, characterized in that: The fifth lead frame forms a rounded corner at a side edge close to the sixth lead frame.

7. The motor stator winding structure according to claim 4, characterized in that: The plurality of single-tooth stators include a third single-tooth stator. The second single-tooth stator is connected between the first and third single-tooth stators. The base of the third single-tooth stator includes a seventh lead frame, an eighth lead frame, and a ninth lead frame. The eighth lead frame is disposed between the seventh and ninth lead frames. The seventh lead frame is closer to the second single-tooth stator than the ninth lead frame. The eighth lead frame is shorter than the seventh and ninth lead frames.

8. The motor stator winding structure according to claim 7, characterized in that: There is a height difference between the eighth lead frame, the seventh lead frame, and the ninth lead frame. The height difference is at least one time of the maximum wire diameter of the winding wire.

9. The motor stator winding structure according to claim 7, characterized in that: The eighth lead frame forms a rounded corner at a side edge close to the ninth lead frame.

10. The motor stator winding structure according to claim 1, wherein: The fixed gap satisfies the following relationship: Wherein, G is the fixed gap, is the maximum wire diameter of the winding, T is the minimum thickness of the guide needle, T is greater than or equal to 0.5 mm, and D is the safety distance between the guide needle and the adjacent single-tooth stator, D is greater than or equal to 1 mm.

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