Wiring terminal of motor winding and motor

Abstract

The utility model provides a wiring terminal of a motor winding and a motor, and relates to the technical field of motors. The wiring terminal of the motor winding comprises a metal body which is used for connecting a winding coil; the wiring hole is formed in the metal body and used for being connected with a power line; and the fracture is arranged at one end of the metal body and is communicated with the wiring hole. Dimedia such as soldering tin are not needed, pollutants such as tin beads and tin slag are not generated, the motor yield is not affected, meanwhile, the structure is simple, a complex mechanical structure does not need to be designed, the external size of the metal body of the wiring terminal only needs to be slightly larger than that of a wire core of a power line, space occupation can be effectively reduced, and the cost is reduced. And compactness and miniaturization of the motor can be realized.

Description

Technical Field

[0001] This application relates to the technical field of motors, and more specifically, to a terminal for connecting a motor winding and a motor. Background Art

[0002] In the related art, the winding coils of a motor need to be connected to a power supply line so that the winding coils can be powered through the power supply line. When connecting the power supply line and the winding coils, generally, soldering or terminal connection methods are used. If the soldering method is adopted, a tin alloy is required as the connection medium, and inevitably, tin beads or tin slag will be generated during operation. If tin beads or tin slag remain, it will affect the yield rate of the motor. When using terminal connection, a female terminal needs to be riveted on the power supply line, and the female terminal is mechanically connected to the terminal pin of the winding. Since there are standards for the sizes of the female terminal and the terminal pin, sufficient insertion space needs to be reserved, which is not conducive to miniaturization. Summary of the Utility Model

[0003] This application aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] To this end, a first aspect of this application provides a terminal for connecting a motor winding.

[0005] A second aspect of this application provides a motor.

[0006] In view of this, a first aspect of this application provides a terminal for connecting a motor winding, including: a metal body for connecting the winding coils; a wiring hole provided in the metal body for connecting the power supply line; and a break provided at one end of the metal body and communicating with the wiring hole.

[0007] In this technical solution, the terminal for connecting the motor winding is used to connect the winding coils and the power supply line, so that the power supply line can energize the winding coils. In the related art, in order to ensure reliable connection between the winding coils and the power supply line, generally, soldering or mechanical connection methods are used to fix the terminal and the power supply line. Among them, if the terminal and the power supply line are connected by soldering, a tin alloy needs to be used as the welding medium, so there will be problems of tin bead or tin slag pollution. If mechanical connection is used, female terminals and terminal pins need to be provided on the terminal and the power supply line respectively. Since there are standards for the sizes of the female terminal and the terminal pin, in order to adapt to the standards, insertion space needs to be reserved inside the motor, which has an adverse impact on the compactness and miniaturization of the motor.

[0008] In view of the above problems, the present application proposes a wiring terminal for a motor winding. The wiring terminal includes a metal body, and the metal body is electrically connected to a winding coil of the motor winding. A wiring hole and a fracture are provided on the metal body, and the fracture communicates with a wiring port. When connecting the wiring terminal and the power line, resistance welding can be used. Exemplarily, after inserting the core of the power line into the wiring hole, a pressing force is applied to the metal body through an electrode. At this time, due to the existence of the fracture, the metal body will be compressed inward, and the aperture of the wiring hole will be compressed, so that the metal body is tightly connected to the core of the power line. At this time, a current is passed through the metal body and the core through the electrode. When the current passes through the metal body and the core, heat is generated to melt the metal body and the core, so that the surfaces of the two are fused together. After the two are cooled and hardened, the reliable connection between the wiring terminal and the power line can be completed.

[0009] Exemplarily, the wiring hole is designed as a round hole, which can increase the contact area between the wiring hole and the battery core and reduce the contact impedance.

[0010] Exemplarily, the material of the metal body can be copper or copper alloy.

[0011] Exemplarily, the material of the metal body is copper-zinc alloy.

[0012] Among them, resistance welding is a type of welding method using resistance heat as the energy source. The metal body of the wiring terminal and the core of the power line are under a certain electrode pressure. The resistance heat generated when the current passes through the metal body and the core of the power line is used to melt the outer surface where the metal body and the core are in contact, so as to weld the metal body and the power line together. During the process, no medium such as solder is required, so no pollutants such as solder balls and solder dross will be generated, and it will not affect the yield rate of the motor.

[0013] At the same time, the wiring terminal designed in the present application has a simple structure and does not require a complex mechanical structure. The external dimensions of the metal body of the wiring terminal only need to be slightly larger than the core of the power line. Therefore, it can effectively reduce the space occupation and is conducive to the compactification and miniaturization of the motor.

[0014] In addition, the wiring terminal for the motor winding in the above technical solution provided by the present application may also have the following additional technical features:

[0015] In some technical solutions of the present application, optionally, the wiring terminal further includes: a hollowed-out part, and the hollowed-out part is provided on the metal body.

[0016] In this technical solution, a hollowed-out portion is provided on the metal body of the terminal block. When connecting the power line and the terminal block by resistance welding, a certain pressing force needs to be applied to the metal body through the electrode. The design of the hollowed-out portion can reduce the required welding pressing force during metal welding, reduce the wear of the electrode, and at the same time can also reduce the stress of the metal body of the terminal block, avoid the fracture of the metal body caused by pressing deformation, and improve the reliability and yield rate during resistance welding.

[0017] In some technical solutions of the present application, optionally, the hollowed-out portion is arranged adjacent to the wiring hole.

[0018] In this technical solution, the hollowed-out portion is arranged adjacent to the wiring hole. When applying a pressing force to the metal body through the electrode, the hollowed-out portion and the wiring hole are deformed and compressed inward synchronously, thereby further reducing the required welding pressing force during metal welding and reducing the stress on the metal body during resistance welding, and reducing the risk of fracture of the metal body.

[0019] In some technical solutions of the present application, optionally, the number of the hollowed-out portions is multiple, and the multiple hollowed-out portions are spaced apart in the length direction of the metal body.

[0020] In this technical solution, the direction from the end of the metal body provided with the wiring hole and the break to the end of the metal body electrically connected to the winding coil is defined as the length direction of the metal body. In the length direction of the metal body, the above-mentioned break, wiring hole, and at least two hollowed-out portions are sequentially arranged. During resistance welding, the electrode applies a pressing force to the metal body. At this time, the wiring hole and the multiple hollowed-out portions will be compressed inward synchronously, thereby reducing the stress on the metal body during resistance welding and reducing the risk of fracture of the metal body.

[0021] In some technical solutions of the present application, optionally, the hollowed-out portion is a through hole, and the terminal block further includes: a through groove, and the through groove communicates with the wiring hole and the hollowed-out portion.

[0022] In this technical solution, the hollowed-out portion is designed as a through hole, and a through groove that sequentially communicates with the wiring hole and one or more hollowed-out portions is further provided on the metal body. By designing the through groove, it can be ensured that when receiving an inward compression pressing force, the wiring hole and the multiple hollowed-out portions can be compressed inward synchronously, which can reduce the required pressing force for resistance welding, reduce the wear of the electrode, and reduce the stress generated by the pressing force on the metal body, and avoid the fracture of the metal body due to the pressing force.

[0023] In some technical solutions of the present application, optionally, the terminal block further includes: a power line, and at least part of the wire core of the power line passes through the wiring hole and is electrically connected to the metal body.

[0024] In this technical solution, one end of the terminal is electrically connected to the winding coil of the motor winding, and the above-mentioned wiring hole and fracture are provided at the other end of the terminal. It can be understood that the wiring hole is located between the fracture and the end of the metal body connected to the winding coil. When connecting the power supply line and the terminal, after passing the wire core of the power supply line through the wiring hole, a certain pressing force is applied to the metal body through the electrode. This pressing force will cause the metal body to compress inward along the fracture and the wiring hole. At this time, the aperture of the wiring hole will shrink accordingly until the inner wall of the wiring hole is in close contact with the wire core. Then the electrode is energized, and when the current passes through the metal body and the wire core, resistance heat is generated, and the heat will melt the inner surface of the wiring hole and the outer surface of the wire core to complete the connection between the terminal and the power supply line. This method does not require the aid of media such as solder, so no pollutants such as solder balls will be generated, and the yield rate can be guaranteed.

[0025] In some technical solutions of the present application, optionally, the diameter of the wire core of the power supply line is D1, the aperture of the wiring hole is D2, and D1 and D2 satisfy: D2 = D1 + D0; where, 0.05mm ≤ D0 ≤ 2mm.

[0026] In this technical solution, let the diameter of the wire core of the power supply line be D1, then the initial aperture D2 of the wiring hole is larger than the diameter D1 of the wire core. And to ensure the connection reliability and tightness, the aperture of the wiring hole should not be too large. Here, it is set that the aperture of the wiring hole satisfies the relational expression: D2 = D1 + D0. Where, D0 is a preset margin. Exemplarily, 0.05mm ≤ D0 ≤ 2mm. Exemplarily, D0 = 0.1mm.

[0027] In some technical solutions of the present application, optionally, the width of the fracture is L, and L satisfies: L = (D2 - D1) × k; where, k is a compression coefficient.

[0028] In this technical solution, let the width of the fracture be L, then L is related to the diameter D1 of the wire core of the power supply line and the aperture D2 of the wiring hole. Exemplarily, L satisfies: L = (D2 - D1) × k; where, k is a preset compression coefficient. Exemplarily, k is associated with the diameter D1 of the wire core. By reasonably setting the width L of the fracture, the pressing force during resistance welding can be set within a reasonable range, and the stability of arc welding can be improved.

[0029] In some technical solutions of the present application, optionally, k satisfies: k = n × D1; where, n is a constant, and 1.5 ≤ n ≤ 5.

[0030] In this technical solution, k is a compression coefficient and is associated with the diameter D1 of the wire core of the power supply line. Exemplarily, the compression coefficient k satisfies: k = n × D1, where, n is a preset constant, and n satisfies: 1.5 ≤ n ≤ 5. Exemplarily, n = 3, that is, k = 3 × D1.

[0031] The second aspect of the present application provides a motor, which includes a terminal as provided in any of the above technical solutions, and a winding. The winding coils of the winding are electrically connected to the terminal. Therefore, this motor also includes all the beneficial effects of the terminal as provided in any of the above technical solutions. To avoid repetition, they will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0033] Figure 1 The structural schematic diagram of the terminal of some embodiments of the present application is shown;

[0034] Figure 2 The structural schematic diagram of the power cord of some embodiments of the present application is shown;

[0035] Figure 3 The structural schematic diagram of the terminal and the power cord of some embodiments of the present application is shown;

[0036] Figure 4 is Figure 3 The partial enlarged view at A of the structural schematic diagram of the terminal and the power cord of some embodiments of the present application shown;

[0037] Figure 5 The structural schematic diagram of the motor of some embodiments of the present application is shown.

[0038] REFERENCE SIGNS:

[0039] 100 Terminal, 102 Metal body, 104 Wiring hole, 106 Fracture, 108 Hollow part, 110 Through groove;

[0040] 200 Power cord, 300 Motor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] In order to be able to more clearly understand the above objects, features and advantages of the present application, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0042] Many specific details are set forth in the following description in order to fully understand the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0043] The following refers to Figures 1 to 5 Describe the terminal of the motor winding and the motor according to some embodiments of the present application.

[0044] In some embodiments of the present application, a wiring terminal for a motor winding is provided. Figure 1 FIG. shows a schematic structural diagram of the wiring terminal according to some embodiments of the present application. Figure 2 FIG. shows a schematic structural diagram of the power cord according to some embodiments of the present application. Figure 3 FIG. shows a schematic structural diagram of the wiring terminal and the power cord according to some embodiments of the present application. Figure 4 is Figure 3 A partial enlarged view of the schematic structural diagram of the wiring terminal and the power cord according to some embodiments of the present application shown in FIG. at A. Figure 5 FIG. shows a schematic structural diagram of the motor according to some embodiments of the present application. As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, the wiring terminal 100 includes:

[0045] A metal body 102 for connecting the winding coil; a wiring hole 104 provided in the metal body 102 for connecting the power cord 200; a break 106 provided at one end of the metal body 102 and communicating with the wiring hole 104.

[0046] In this embodiment, the wiring terminal 100 of the motor winding is used to connect the winding coil and the power cord 200, so that the power cord 200 can energize the winding coil. In the related art, in order to ensure reliable connection between the winding coil and the power cord 200, the terminal and the power cord 200 are generally fixed by soldering or mechanical connection. Among them, if the terminal and the power cord 200 are connected by soldering, a tin alloy needs to be used as the welding medium, so there will be problems of tin bead or tin slag pollution. If connected by mechanical connection, a female terminal and a terminal pin need to be provided on the terminal and the power cord 200 respectively. Since the sizes of the female terminal and the terminal pin have standards, in order to adapt to the standards, an insertion space needs to be reserved inside the motor 300, which has an adverse effect on the compactness and miniaturization of the motor 300.

[0047] In view of the above problems, the present application proposes a terminal 100 for an electric motor winding. The terminal 100 includes a metal body 102, and the metal body 102 is electrically connected to a winding coil of the electric motor winding. A wiring hole 104 and a break 106 are provided on the metal body 102, and the break 106 communicates with the wiring port. When connecting the terminal 100 and the power supply line 200, a resistance welding method can be used. Exemplarily, after inserting the core of the power supply line 200 into the wiring hole 104, a pressing force is applied to the metal body 102 through an electrode. At this time, due to the existence of the break 106, the metal body 102 will be compressed inward, and the aperture of the wiring hole 104 is compressed, so that the metal body 102 is tightly connected to the core of the power supply line 200. At this time, a current is passed through the metal body 102 and the core by the electrode. When the current passes through the metal body 102 and the core, it generates heat to melt the metal body 102 and the core, so that the surfaces of the two are fused together. After the two are cooled and hardened, the reliable connection between the terminal 100 and the power supply line 200 can be completed.

[0048] Exemplarily, the wiring hole 104 is designed as a round hole, which can increase the contact area between the wiring hole 104 and the battery core and reduce the contact impedance.

[0049] Exemplarily, the material of the metal body 102 can be copper or copper alloy.

[0050] Exemplarily, the material of the metal body 102 is a copper-zinc alloy.

[0051] Among them, resistance welding is a type of welding method using resistance heat as the energy source. The metal body 102 of the terminal 100 and the core of the power supply line 200 are under a certain electrode pressure, and the resistance heat generated when the current passes through the metal body 102 and the core of the power supply line 200 is used to melt the outer surface of the contact between the metal body 102 and the core, so as to weld the metal body 102 and the power supply line 200 together. During the process, no medium such as solder is required, so no pollutants such as solder beads and solder dross will be generated, and it will not affect the yield rate of the electric motor 300.

[0052] At the same time, the terminal 100 designed in the present application has a simple structure and does not require a complex mechanical structure. The external dimension of the metal body 102 of the terminal 100 only needs to be slightly larger than the core of the power supply line 200. Therefore, it can effectively reduce the space occupation and is beneficial to the compactification and miniaturization of the electric motor 300.

[0053] In some embodiments of the present application, optionally, as Figure 1 shown, the terminal 100 further includes: a hollowed-out portion 108, and the hollowed-out portion 108 is provided on the metal body 102.

[0054] In this embodiment, a hollowed-out portion 108 is provided on the metal body 102 of the terminal 100. When connecting the power line 200 and the terminal 100 by resistance welding, a certain pressing force needs to be applied to the metal body 102 through an electrode. The design of the hollowed-out portion 108 can reduce the required welding pressing force during metal welding, reduce the wear of the electrode, and at the same time can also reduce the stress of the metal body 102 of the terminal 100, avoid the fracture of the metal body 102 caused by pressing deformation, and improve the reliability and yield rate during resistance welding.

[0055] In some embodiments of the present application, optionally, as Figure 1 shown, the hollowed-out portion 108 is disposed adjacent to the wiring hole 104.

[0056] In this embodiment, the hollowed-out portion 108 is disposed adjacent to the wiring hole 104. When applying a pressing force to the metal body 102 through an electrode, the hollowed-out portion 108 and the wiring hole 104 are synchronously deformed and compressed inward, thereby further reducing the required welding pressing force during metal welding and reducing the stress on the metal body 102 during resistance welding, and reducing the risk of fracture of the metal body 102.

[0057] In some embodiments of the present application, optionally, the number of the hollowed-out portions 108 is multiple, and the multiple hollowed-out portions 108 are spaced apart in the length direction of the metal body 102.

[0058] In this embodiment, Figure 1 The arrow X in shows the length direction of the metal body 102. The direction from the end of the metal body 102 where the wiring hole 104 and the fracture 106 are provided to the end of the metal body 102 electrically connected to the winding coil is defined as the length direction of the metal body 102. In the length direction of the metal body 102, the above-mentioned fracture 106, wiring hole 104, and at least two hollowed-out portions 108 are sequentially provided. During resistance welding, when the electrode applies a pressing force to the metal body 102, the wiring hole 104 and the multiple hollowed-out portions 108 will be synchronously compressed inward, thereby reducing the stress on the metal body 102 during resistance welding and reducing the risk of fracture of the metal body 102.

[0059] In some embodiments of the present application, optionally, as Figure 1 shown, the hollowed-out portion 108 is a through hole, and the terminal 100 further includes: a through groove 110, and the through groove 110 communicates the wiring hole 104 and the hollowed-out portion 108.

[0060] In this embodiment, the hollow portion 108 is designed as a through hole, and a through groove 110 that sequentially communicates the wiring hole 104 and one or more hollow portions 108 is further provided on the metal body 102. By designing the through groove 110, it can be ensured that when a compressive force acting inward is applied, the wiring hole 104 and the plurality of hollow portions 108 can be compressed inward synchronously, which can reduce the compressive force required for resistance welding and electrode wear, and reduce the stress generated on the metal body 102 due to the compressive force, avoiding the fracture of the metal body 102 due to the compressive force.

[0061] In some embodiments of the present application, optionally, as Figure 2 and Figure 4 shown, the terminal 100 further includes: a power line 200, and at least part of the wire core of the power line 200 passes through the wiring hole 104 and is electrically connected to the metal body 102.

[0062] In this embodiment, one end of the terminal 100 is electrically connected to the winding coil of the motor winding, and the above-mentioned wiring hole 104 and the break 106 are provided at the other end of the terminal 100. It can be understood that the wiring hole 104 is located between the break 106 and the end of the metal body 102 connected to the winding coil. When connecting the power line 200 and the terminal 100, after passing the wire core of the power line 200 through the wiring hole 104, a certain compressive force is applied to the metal body 102 by an electrode. This compressive force will cause the metal body 102 to be compressed inward along the break 106 and the wiring hole 104. At this time, the aperture of the wiring hole 104 will shrink accordingly. When the inner wall of the wiring hole 104 is in close contact with the wire core, the electrode is energized, and when the current passes through the metal body 102 and the wire core, resistance heat is generated, and the heat will melt the inner surface of the wiring hole 104 and the outer surface of the wire core to complete the connection between the terminal 100 and the power line 200. This method does not require the use of media such as solder, so no pollutants such as solder balls will be generated, and the yield can be guaranteed.

[0063] In some embodiments of the present application, optionally, the diameter of the wire core of the power line 200 is D1, the aperture of the wiring hole 104 is D2, and D1 and D2 satisfy: D2 = D1 + D0; where, 0.05 mm ≤ D0 ≤ 2 mm.

[0064] In this embodiment, assuming that the diameter of the wire core of the power line 200 is D1, the initial aperture D2 of the wiring hole 104 is larger than the diameter D1 of the wire core. And in order to ensure the connection reliability and tightness, the aperture of the wiring hole 104 should not be too large. Here, it is set that the aperture of the wiring hole 104 satisfies the relationship: D2 = D1 + D0. Where, D0 is a preset margin. Exemplarily, 0.05 mm ≤ D0 ≤ 2 mm. Exemplarily, D0 = 0.1 mm.

[0065] In some embodiments of the present application, optionally, as Figure 1As shown, the width of the fracture 106 is L, and L satisfies: L = (D2 - D1) × k; where k is the compression coefficient.

[0066] In this embodiment, let the width of the fracture 106 be L. Then L is related to the diameter D1 of the wire core of the power cord 200 and the aperture D2 of the wiring hole 104. Exemplarily, L satisfies: L = (D2 - D1) × k; where k is a preset compression coefficient. Exemplarily, k is associated with the diameter D1 of the wire core. By reasonably setting the width L of the fracture 106, the pressing force during resistance welding can be set within a reasonable range, improving the stability of arc welding.

[0067] In some embodiments of the present application, optionally, k satisfies: k = n × D1; where n is a constant and 1.5 ≤ n ≤ 5.

[0068] In this embodiment, k is the compression coefficient and k is associated with the diameter D1 of the wire core of the power cord 200. Exemplarily, the compression coefficient k satisfies: k = n × D1, where n is a preset constant and n satisfies: 1.5 ≤ n ≤ 5. Exemplarily, n = 3, that is, k = 3 × D1.

[0069] The second aspect of the present application provides a motor 300, as Figure 3 and Figure 5 shown. The motor 300 includes the wiring terminal 100 provided in any of the above embodiments, and a winding. The winding coil of the winding is electrically connected to the wiring terminal 100. Therefore, the motor 300 also includes all the beneficial effects of the wiring terminal 100 provided in any of the above embodiments. To avoid repetition, it will not be elaborated here.

[0070] In the description of the present application, the term "plurality" means two or more. Unless otherwise clearly defined, the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application; terms such as "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0071] In the description of the present application, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0072] The foregoing are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A connection terminal for a motor winding, characterized in that: include: A metal body, wherein the metal body is used to connect the winding coil; A wiring hole, which is provided on the metal body and is used to connect a power line; A fracture, wherein the fracture is arranged at one end of the metal body and is connected to the wiring hole.

2. The connection terminal according to claim 1, characterized in that: Also includes: A hollow portion is provided on the metal body.

3. The connection terminal according to claim 2, characterized in that: The hollow portion is arranged adjacent to the wiring hole.

4. The connection terminal according to claim 2, characterized in that: There are multiple hollow parts, and the multiple hollow parts are distributed at intervals in the length direction of the metal body.

5. The connecting terminal according to any one of claims 2 to 4, characterized in that: The hollow portion is a through hole, and the wiring terminal further comprises: A through groove is connected to the wiring hole and the hollow portion.

6. The connecting terminal according to any one of claims 1 to 4, characterized in that: Also includes: The power cord, at least part of the core of the power cord passes through the wiring hole and is electrically connected to the metal body.

7. The connection terminal according to claim 6, characterized in that: The core diameter of the power cord is D1, the hole diameter of the wiring hole is D2, and D1 and D2 satisfy: D2=D1+D0; wherein D0 is a preset length, and 0.05mm≤D0≤2mm.

8. The connection terminal according to claim 7, characterized in that: The width of the fracture is L, and L satisfies: L=(D2-D1)×k; wherein k is the compression coefficient.

9. The connection terminal according to claim 8, characterized in that: k satisfies: k=n×D1; wherein n is a constant, and 1.5≤n≤5.

10. A motor, characterized in that: include: A connection terminal for a motor winding according to any one of claims 1 to 9.

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