Stator structure and wire tying method thereof

Abstract

A stator structure and a wire binding method thereof are provided, the stator structure is used for connecting a power supply, and the stator structure comprises an annular stator body, a plurality of insulation frames, a first winding wire, a plurality of conductive pins and at least one second winding wire. The annular stator body is annularly provided with a plurality of stator teeth. The plurality of insulating frames are respectively coated on the stator teeth. The first winding wire is wound on the insulating frames. And the conductive pins protrude out of one end face of the annular stator body, and the conductive pins are electrically connected with the first winding wires. The second winding fold line is arranged on the at least three conductive pins, and the power supply supplies power to the conductive pins through the second winding.

Description

Technical Field

[0001] The present invention relates to a motor stator structure, and in particular to a wiring structure and a wiring method of a motor stator. Background Art

[0002] The current motor stator single-tooth concentrated winding can be connected by printed circuit boards, stranded wire welding, and wire trays. The purpose of the connection is to connect the single teeth of the stator to conduct electricity.

[0003] As the rated current of the motor increases, the printed circuit board cannot be used due to material limitations, the copper wire strands are difficult to make due to the large diameter of the copper wire, and the wire reels are expensive due to the large copper sheets. Therefore, how to reduce the wiring cost of the motor stator is an area that manufacturers are eager to improve. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a stator structure and a wiring method to solve the above-mentioned problems of the prior art.

[0005] To achieve the above-mentioned purpose, according to some embodiments of the present invention, a stator structure is used to connect a power source, and the stator structure includes an annular stator body, a plurality of insulating frames, a first winding, a plurality of conductive pins and at least one second winding. The annular stator body is provided with a plurality of stator teeth. A plurality of insulating frames are respectively covered on these stator teeth. The first winding is wound on these insulating frames. A plurality of conductive pins protrude from an end surface of the annular stator body, wherein these conductive pins are electrically connected to the first winding. A second winding is provided with a folded line knot on these at least three conductive pins, wherein the power source supplies power to these conductive pins through the second winding.

[0006] In some embodiments of the present invention, the stator structure further includes a plurality of insulating pins, wherein the insulating pins protrude from the end surface of the annular stator body.

[0007] In some embodiments of the present invention, each of the insulating pins is located between two adjacent ones of the conductive pins in the circumferential direction.

[0008] In some embodiments of the present invention, the height of the conductive pins in the axial direction is greater than the height of the insulating pins.

[0009] In some embodiments of the present invention, a boot portion of the stator teeth defines a rotor accommodating space, at least one of the insulating pins is closer to the rotor accommodating space than at least one of the conductive pins, and the second winding abuts against at least one of the insulating pins to form a fold line.

[0010] In some embodiments of the present invention, a shoe portion of the stator teeth defines a rotor accommodating space, and the second winding does not overlap the rotor accommodating space in the axial direction.

[0011] In some embodiments of the present invention, the conductive pins include: a first conductive pin connected to a first phase power supply and a second conductive pin connected to a second phase power supply, wherein the second winding is electrically connected to the first conductive pin and insulated against the second conductive pin.

[0012] In some embodiments of the present invention, the conductive pins include: a third conductive pin connected to a third phase power supply, wherein another second winding is electrically connected to the second conductive pin and insulated against the third conductive pin.

[0013] According to some embodiments of the present invention, a stator wiring method includes: providing an annular stator body, wherein a plurality of stator teeth are arranged around the annular stator body; disposing a plurality of conductive pins on an end surface of the annular stator body; winding a first winding around these stator teeth, wherein the first winding is electrically connected to these conductive pins; and folding at least one second winding around these at least three conductive pins, wherein power is supplied to these conductive pins through the second winding.

[0014] In summary, the stator structure of the present invention utilizes a wiring structure composed of conductive pins, insulating pins and winding wires to reduce the wiring cost of the motor stator and avoid the high-cost wiring methods such as existing printed circuit boards, stranded wire welding and wiring reels. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the above and other objects, features, advantages and embodiments of the present invention more clearly understood, the accompanying drawings are described as follows:

[0016] Figure 1 A three-dimensional diagram illustrating a stator structure according to some embodiments of the present invention;

[0017] Figure 2 A top view of a stator structure according to some embodiments of the present invention is shown;

[0018] Figure 3 A partially enlarged side view showing a stator structure according to some other embodiments of the present invention;

[0019] Figure 4 A partially enlarged side view showing a stator structure according to some further embodiments of the present invention;

[0020] Figure 5 A partially enlarged top view showing a stator structure according to some other embodiments of the present invention;

[0021] Figure 6 To illustrate Figure 5 Partially enlarged side view of the stator structure.

[0022]

Explanation of symbols

[0023] 100: stator structure

[0024] 102: Ring-shaped stator body

[0025] 102a: End face

[0026] 104: stator teeth

[0027] 104a: Boots

[0028] 106: Insulation frame

[0029] 108: Conductive pin

[0030] 108a: Conductive pin

[0031] 108b: Conductive pin

[0032] 108c: Conductive pin

[0033] 108d: Conductive pin

[0034] 108e: Conductive pin

[0035] 108f: Conductive pin

[0036] 108g: Conductive pin

[0037] 108h: Conductive pin

[0038] 108i: Conductive pin

[0039] 108m: Conductive pin

[0040] 108n: Conductive pin

[0041] 108p: Conductive pin

[0042] 108q: Conductive pin

[0043] 108r: Conductive pin

[0044] 108s: Conductive pin

[0045] 108t: Conductive pin

[0046] 109: Insulation pin

[0047] 109a: Insulation pin

[0048] 109b: Insulation pin

[0049] 109c: Insulation pin

[0050] 109d: Insulation pin

[0051] 112: Winding

[0052] 114: Winding

[0053] 114a: Winding

[0054] 114b: Winding

[0055] 114c: Winding

[0056] 114d: Winding

[0057] 114e: Winding

[0058] 114g: Winding

[0059] 114h: Winding

[0060] 150: Rotor accommodation space

[0061] PS u :First phase power supply

[0062] PS v : Second phase power supply

[0063] PS w :Third phase power supply

[0064] AD: Axial

[0065] CD: Circumferential direction

[0066] D1: Distance

[0067] D2: Distance DETAILED DESCRIPTION

[0068] In order to make the description of the present invention more detailed and complete, reference may be made to the attached drawings and various embodiments described below. The elements in the drawings are not drawn to scale and are provided only for the purpose of illustrating the present invention. Many practical details are described below to provide a comprehensive understanding of the present invention. However, a person of ordinary skill in the relevant art should understand that the present invention can be implemented without one or more of the practical details, and therefore, these details should not be used to limit the present invention.

[0069] Please refer to Figure 1 , Figure 1 A three-dimensional diagram of a stator structure 100 according to some embodiments of the present invention is shown. The stator structure 100 of the motor includes an annular stator body 102. The annular stator body 102 is made of a material with good magnetic permeability and mechanical properties. In some embodiments of the present invention, the material of the annular stator body 102 includes silicon steel sheets or certain special alloys. The material of the annular stator body 102 is cut into a desired shape and size. Mechanical cutting tools or laser cutting machines are usually used for cutting to ensure accuracy and consistency. If silicon steel sheets are used as stator materials, the cut silicon steel sheets are stacked. During the stacking process, an insulating coating is usually applied between the silicon steel sheets to reduce the conductivity between the iron cores and reduce the flux loss.

[0070] In some embodiments of the present invention, silicon steel sheets are cut and stacked to form a plurality of stator teeth 104. The plurality of stator teeth 104 are arranged in a circle along the circumferential direction CD, and define a rotor accommodating space 150 with their boots 104a as a space for a rotor (not shown in the figure) to rotate. The number and shape of these stator teeth 104 will vary according to the design requirements and working principles of the motor. The main function of the stator teeth 104 is to increase the magnetic coupling between the stator and the rotor, which is achieved by providing a longer magnetic circuit. When current passes through the stator teeth 104, they generate a magnetic field, which interacts with the magnetic field of the rotor to generate torque and drive the motor to operate.

[0071] Multiple stator teeth 104 are respectively covered with insulating frames 106 to fix the winding coils and provide insulating support. The winding coils are composed of windings 112 (or first windings), which are used to generate a magnetic field to drive the motor. The main function of the insulating frame 106 is to maintain the shape of the windings 112, prevent the coils from contacting each other or short-circuiting, and provide insulation to prevent current from leaking to other parts or grounding. The insulating frame 106 is usually made of insulating materials to ensure that the current does not pass through the insulating frame to cause a short circuit or failure of the circuit. Common insulating materials include plastics, such as polyimide or glass fiber reinforced plastic. These materials have good insulating properties, can withstand high temperatures, voltages and stresses, and have sufficient strength and durability. The design and material selection of the insulating frame play an important role in the performance and reliability of the motor. It can ensure the correct configuration and fixation of the winding coils, and provide the necessary insulation protection to ensure the normal operation and safety performance of the motor. Figure 1 Only one stator tooth 104 is shown with the winding 112 , and the other stator teeth 104 also have similar windings to form the required winding coils.

[0072] A plurality of conductive pins 108 protrude from an end surface 102a of the annular stator body 102 parallel to the axial direction AD. In some embodiments of the present invention, the conductive pins 108 are inserted into pre-designed sockets on the insulating frame 106. Usually, two conductive pins 108 are aligned or matched with a corresponding stator tooth 104 in the circumferential direction CD, and the two ends of the winding 112 of the winding coil corresponding to the stator tooth 104 are electrically connected to the two conductive pins 108. When the plurality of conductive pins 108 are used as the wiring structure of the stator 100, the connection relationship between the conductive pins 108 determines the flow mode of the current in the stator winding.

[0073] In some embodiments of the present invention, the stator structure 100 of the motor further includes a plurality of insulating pins 109, which also protrude from the end surface of the annular stator body 102. Although the insulating pins 109 cannot provide a current conduction function, they serve as winding transition points or folding points in the wiring structure.

[0074] Please also refer to Figure 1 , 2 , Figure 2 A top view of a stator structure 100 according to some embodiments of the present invention is shown. This figure shows a partial wiring structure of the stator structure 100. The wiring structure includes conductive pins (108a-108i) and insulating pins (109a-109d). In some embodiments of the present invention, each insulating pin 109 is aligned with a corresponding stator tooth 104 in the circumferential direction, or each insulating pin 109 is located between two adjacent conductive pins 108 in the circumferential direction. In some embodiments of the present invention, the insulating pin 109 is located at the center point between the corresponding two conductive pins 108 of a single stator tooth 104. For example, the insulating pin 109a is located at the center point between the two conductive pins (108a, 108b), and the insulating pin 109a and the two conductive pins (108a, 108b) have an equal distance; the insulating pin 109b is located at the center point between the two conductive pins (108c, 108d), and the insulating pin 109b and the two conductive pins (108c, 108d) have an equal distance; the insulating pin 109c is located at the center point between the two conductive pins (108e, 108f), and the insulating pin 109c and the two conductive pins (108e, 108f) have an equal distance. Although the insulating pin 109 cannot provide a current conduction function, it can be used as a choice of a winding transition point or a folding point in the wiring structure. In some embodiments of the present invention, the distance between the adjacent insulating pin 109 and the conductive pin 108 is substantially equal to the distance between the adjacent two conductive pins 108. For example, the distance D1 between the adjacent insulating pin 109 and the conductive pin 108 in the figure is equal to the distance D2 between the adjacent two conductive pins 108. This makes any two adjacent (insulating or conductive) pins have equal spacing, which is conducive to more uniform winding of the wire. In other embodiments of the present invention, the distance D1 between the adjacent insulating pin and the conductive pin is also different from the distance D2 between the adjacent two conductive pins.

[0075] In some embodiments of the present invention, Figure 2 The windings (114a, 114b, 114c, 114d, 114e) in the stator 104 are connected to the conductive pins 108 to achieve the required connection mode of the motor stator, such as star connection or delta connection. The windings (114a, 114b, 114c, 114d, 114e) or second windings 114 are different from the (first) windings 112 (such as the first windings 112) wound on the stator teeth 104. Figure 1). For example, the winding wire 114a is connected in a straight line between the conductive pin 108a and the conductive pin 108c. For example, the winding wire 114b is connected in a straight line between the conductive pin 108d and the conductive pin 108e. For example, the winding wire 114c is folded and arranged between the conductive pin 108b, the conductive pin 108f and the conductive pin 108i. The winding wire 114c is connected in a straight line between the conductive pin 108b and the conductive pin 108f. The winding wire 114c is also connected in a straight line between the conductive pin 108i and the conductive pin 108f. The conductive pin 108f is a transition point or a folding point of the winding wire. For example, the winding wire 114d is provided at a folded line knot between the conductive pin 108f, the insulating pin 109d, the conductive pin 108h and the conductive pin 108i, the winding wire 114d is connected in a straight line between the insulating pin 109d and the conductive pin 108f, the winding wire 114d is connected in a straight line between the insulating pin 109d and the conductive pin 108h, the winding wire 114d is also connected in a straight line between the conductive pin 108h and the conductive pin 108i, and the insulating pin 109d and the conductive pin 108h are the transition point or folded line point of the winding wire. For example, the winding wire 114e is provided at a folded line knot between the conductive pin 108f, the conductive pin 108g and the conductive pin 108i, the winding wire 114e is connected in a straight line between the conductive pin 108f and the conductive pin 108g, the winding wire 114e is also connected in a straight line between the conductive pin 108g and the conductive pin 108i, and the conductive pin 108g is the transition point or folded line point of the winding wire. Due to different functional requirements, there are multiple paths of freedom. For example, if you want to connect the conductive pin 180f and the conductive pin 108i, you can use other paths such as connecting conductive pins 108f, 108g, 108i or conductive pins 108f, 109d, 108h, 108i due to the functional requirements of the transition point or possible interference of the path. The intermediate transition point may be a conductive pin or an insulating pin.

[0076] In some embodiments of the present invention, Figure 2 The windings (114a, 114b, 114c, 114d, 114e) do not overlap the rotor accommodating space 150 in the axial direction to avoid interference with the rotor.

[0077] In some embodiments of the present invention, the conductive pin 108i may be connected to the first phase power supply PS u The conductive pin 108f may be connected to the second phase power supply PS v The conductive pin 108g may be connected to the third phase power supply PS w The conductive pin 108 is provided with a conductive pin 108, wherein the winding wire 114e is electrically connected to the conductive pin 108f and insulated against the conductive pin 108g.

[0078] Please also refer to Figure 1 , 3 , 4, Figure 3 To illustrate a partially enlarged side view of a stator structure 100 according to some other embodiments of the present invention, Figure 4 The following is a partial enlarged side view of the stator structure 100 according to some further embodiments of the present invention. The winding 114e and the winding 114f are used to electrically connect the conductive pin 108m and the conductive pin 108n. Since the outer surface of the winding has an insulating layer or insulating paint, the section of the winding wound around the conductive pin 108 needs to be stripped of the layer or paint to achieve electrical connection between the winding 114 and the conductive pin 108. Figure 3 In the embodiment, the section where the winding wire 114e is wound around the conductive pin 108m and the conductive pin 108n has been stripped of the coating or paint, and the winding wire 114e is connected in a straight line between the conductive pin 108m and the conductive pin 108n, without using the conductive pin 108p, the conductive pin 108q or the insulating pin 109 as a transition point or a folding point, so that the conductive pin 108m and the conductive pin 108n are electrically connected. Figure 4 In the embodiment of the present invention, the section of the winding 114f wound around the conductive pins 108m and 108n has been stripped of coating or paint, and the winding 114f is also not stripped of coating or paint and is wound around the conductive pin 108p. This wiring method also allows the conductive pins 108m and 108n to achieve electrical connection, but the winding 114e is not connected between the conductive pins 108m and 108n in a straight line, but is bent through the conductive pin 108p. This wiring method can avoid the situation where the local wiring is too crowded. In some embodiments of the present invention, the height of the conductive pins (108m, 108n, 108p, 108q) in the axial direction AD is greater than the height of the insulating pin 109. The windings 114e and 114f are wound between the conductive pins 108, or are called second windings 114, which are different from the (first) windings 112 wound around the stator teeth 104. When a single conductive pin 108 needs to be wound with different windings 114 , they can be wound around different sections of the conductive pin 108 in the axial direction AD, for example Figure 3 , 4 The conductive pins 108m and 108n in FIG.

[0079] Please also refer to Figure 1 , 5 , 6, Figure 5 To illustrate a partially enlarged top view of a stator structure 100 according to some other embodiments of the present invention, Figure 6 To illustrate Figure 5A partially enlarged side view of the stator structure 100. The figure shows a partial winding 114g and a winding 114h of the stator structure 100. One end of the winding 114h is wound around the conductive pin 108s after the layers or paint are stripped. Both ends of the winding 114g are wound around the conductive pin 108t and the conductive pin 108r after the layers or paint are stripped, so that the conductive pin 108t and the conductive pin 108r are electrically connected. If the winding 114g is connected to the conductive pin 108t and the conductive pin 108r in a straight line, it will interfere with the winding 114h wound around the conductive pin 108s. Because the insulating pin 109 is closer to the rotor accommodating space 150 than the conductive pin 108s, it is chosen to abut the insulating pin 109 and bend the line so that an appropriate insulation distance is maintained between the winding 114g and the conductive pin 108s (refer to Figure 5 ), and the winding 114h and the winding 114g are only staggered in the axial direction AD (near the conductive pin 108s) but still maintain an appropriate insulation distance (refer to Figure 6 In some embodiments of the present invention, the winding 114g only abuts against one side of the insulating pin 109 to achieve the purpose of folding the wire, and the winding 114g can also be wrapped around the insulating pin 109 to achieve the purpose of folding the wire. The second winding 114 can also avoid interference and insulation to prevent short circuits by using the outer contour folding line of the conductive pins (108t, 108r) and the height difference of the winding (114g, 114h) position.

[0080] In summary, the stator structure of the present invention utilizes a wiring structure composed of conductive pins 108, insulating pins 109 and windings 114 (or second windings 114) to reduce the wiring cost of the motor stator and avoid high-cost wiring methods such as existing printed circuit boards, stranded wire welding and wiring reels.

[0081] Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Anyone familiar with the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope defined in the attached claims.

Claims

1. A stator structure for connecting a power source, characterized in that: Include: An annular stator body, with a plurality of stator teeth arranged therein; A plurality of insulating frames, respectively covered on the plurality of stator teeth; a first winding, wound around the plurality of insulating frames; A plurality of conductive pins protruding from an end surface of the annular stator body, wherein the plurality of conductive pins are electrically connected to the first winding; At least one second winding wire is folded and arranged at at least three of the conductive pins, wherein the power source supplies power to the plurality of conductive pins through the second winding wire.

2. The stator structure according to claim 1, characterized in that: The invention also comprises a plurality of insulating pins, wherein the plurality of insulating pins protrude from the end surface of the annular stator body.

3. The stator structure according to claim 2, characterized in that: Each of the insulating pins is aligned with a corresponding stator tooth in the circumferential direction.

4. The stator structure according to claim 2, characterized in that: Each of the insulating pins is located between two adjacent ones of the plurality of conductive pins in the circumferential direction.

5. The stator structure according to claim 2, characterized in that: The height of the plurality of conductive pins in the axial direction is greater than the height of the plurality of insulating pins.

6. The stator structure according to claim 2, characterized in that: A boot portion of the plurality of stator teeth defines a rotor accommodating space, at least one of the plurality of insulating pins is closer to the rotor accommodating space than at least one of the plurality of conductive pins, and the second winding abuts against at least one of the plurality of insulating pins to form a fold line.

7. The stator structure according to claim 1, characterized in that: A shoe portion of the plurality of stator teeth defines a rotor accommodating space, and the second winding does not overlap the rotor accommodating space in the axial direction.

8. The stator structure according to claim 1, characterized in that: The plurality of conductive pins include: a first conductive pin connected to a first phase power source; and a second conductive pin connected to a second phase power supply, The second winding is electrically connected to the first conductive pin and insulated against the second conductive pin.

9. The stator structure according to claim 8, characterized in that: The plurality of conductive pins include: a third conductive pin connected to a third phase power supply, Another of the second windings is electrically connected to the second conductive pin and insulated against the third conductive pin.

10. A method for connecting a stator, characterized in that: Include: Providing an annular stator body, wherein a plurality of stator teeth are arranged around the annular stator body; A plurality of conductive pins are arranged on an end surface of the annular stator body; Winding a first winding wire around the plurality of stator teeth, wherein the first winding wire is electrically connected to the plurality of conductive pins; as well as At least one second winding is formed on at least three of the conductive pins in a folded line, wherein power is supplied to the plurality of conductive pins through the second winding.

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