Motor stator structure

Abstract

The utility model provides a motor stator structure, which comprises a stator iron core and a plurality of coil groups, the stator iron core comprises a ring part and six groups of tooth parts, each group of tooth parts is provided with a clockwise winding tooth part and an anticlockwise winding tooth part, the clockwise winding tooth parts and the anticlockwise winding tooth parts of the six groups of tooth parts are sequentially arranged at intervals along the inner periphery of the ring part in a staggered manner, each group of tooth parts and the clockwise winding tooth parts and the anticlockwise winding tooth parts of two adjacent groups of tooth parts jointly define a stator slot, and the plurality of coil groups are sequentially and alternately wound on the clockwise winding tooth parts and the anticlockwise winding tooth parts of each group of tooth parts along the arrangement direction of the six groups of tooth parts of the ring part in the clockwise direction and the anticlockwise direction; each coil group is provided with a first thread end, a second thread end and a winding section, the winding section is located between the first thread end and the second thread end and connected with the first thread end and the second thread end, and the winding section is wound along the clockwise winding tooth part of each group of tooth parts in the clockwise direction and continuously extends to the reverse winding tooth part to be wound in the anticlockwise direction; the first thread ends and the second thread ends are led out from each stator groove from inside to outside to be exposed, the thread ends are evenly distributed and easy to identify, and the assembly production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a motor stator structure, and more particularly to a motor stator structure capable of achieving uniform distribution of thread ends, easy identification and improved assembly efficiency. Background Art

[0002] At present, the three-phase motors generally used in fans mostly use 12-slot 10-pole or 12-slot 14-pole stators. The stator 1 has six coil groups wound on twelve teeth. The winding is based on the three-phase concentrated winding parallel branch number of 2. For example, it is generally used as follows Figure 1A , Figure 1B The 12 teeth of the stator 1 (such as Figure 1B The numbers 1 to 12 represent the order of the tooth arrangement. The winding method is as follows: the first coil group 101 is wound clockwise from the first tooth 111 (eg Figure 1B , 頂 represents the clockwise winding direction) and then extends to the second tooth portion 112 for counterclockwise winding (such as Figure 1B , counter represents the counterclockwise winding direction), the second coil group 102 is counterclockwise wound from the third tooth portion 113 and then extends to the fourth tooth portion 114 and is clockwise wound, the third coil group 103 is clockwise wound from the fifth tooth portion 115 and then extends to the sixth tooth portion 116 and is counterclockwise wound. The fourth coil group 104 is counterclockwise wound from the seventh tooth portion 117 and then extends to the eighth tooth portion 118 and is clockwise wound, the fifth coil group 105 is clockwise wound from the ninth tooth portion 119 and then extends to the tenth tooth portion 120 and is counterclockwise wound, the sixth coil group 106 is counterclockwise wound from the eleventh tooth portion 121 and then extends to the twelfth tooth portion 122 and is clockwise wound, and each coil group leads to two wire ends 1081 and 1082 respectively, and the six coil groups lead to twelve wire ends in total.

[0003] However, the above stator winding method has some problems, that is, two wire ends 1081 and 1082 are led out from a stator slot 14 between two adjacent teeth (i.e., the second and third teeth 112 and 113, the sixth and seventh teeth 116 and 117, and the tenth and eleventh teeth 120 and 121) (i.e., there are two wire ends 1081 and 1082 in the same stator slot 14, such as Figure 1AAs shown, only one lead wire 1081 (1802) is led out from the stator slot 14 between the other two adjacent tooth parts, or there is no lead wire (for example, there is no lead wire in the stator slot 14 between the fourth and fifth tooth parts 114 and 115, between the eighth and ninth tooth parts 118 and 119, and between the first and twelfth tooth parts 111 and 122). Therefore, this causes uneven distribution of the taps (i.e., the led-out lead wires), making it easy to misidentify the lead wires 1081 and 1802 of each coil group during the assembly line welding to the circuit board (PCB) and resulting in incorrect welding. In addition to the problem of poor product quality, it is also necessary to consider that there are two lead wires 1081 in some of the same stator slots 14. When planning and designing the circuit board, it is necessary to consider processing two pads at the same position on the circuit board, which makes the circuit board design difficult and increases the complexity of the circuit board wiring, thereby reducing the overall assembly production efficiency.

[0004] In addition, since the winding directions of adjacent coil groups are opposite, for example, the winding directions of the first coil group 101 and the adjacent second coil group 102, the third coil group 103 and the adjacent fourth coil group 104, and the fifth coil group 105 and the adjacent sixth coil group 106 are opposite. When the stator 1 is wound on a winding machine, it is necessary to make targeted adjustments (for example, the winding program needs to be adjusted and cannot be copied). This will increase uncontrollable factors, and for a stator with a high slot fill factor, it is easy to cause quality hidden dangers. Summary of the Invention

[0005] To improve the above problems, the main purpose of the present invention is to provide a motor stator structure with uniform lead wire distribution, easy identification, and improved assembly production efficiency.

[0006] Another purpose of the present invention is to provide a motor stator structure. Only one lead wire is led out from each stator slot, so that when designing the circuit board, the pads can be evenly distributed to achieve a convenient design effect.

[0007] To achieve the above object, the present utility model provides a motor stator structure, including a stator core and a plurality of coil groups. The stator core includes six sets of tooth portions and a ring portion. Each set of tooth portions has a clockwise-wound tooth portion and a counterclockwise-wound tooth portion. The clockwise-wound tooth portions and the counterclockwise-wound tooth portions of the six sets of tooth portions are sequentially and alternately arranged at intervals along a circumference within the ring portion. And each set of tooth portions and the clockwise-wound tooth portions and the counterclockwise-wound tooth portions of two adjacent sets of tooth portions together define a stator slot. The plurality of coil groups are sequentially wound in clockwise and counterclockwise directions alternately along the arrangement direction of the six sets of tooth portions of the ring portion on the clockwise-wound tooth portion and the counterclockwise-wound tooth portion of each set of tooth portions. And each coil group has a first lead wire, a second lead wire, and a winding segment located between the first lead wire and the second lead wire and connected to each other. The winding segment of each coil group is wound in a clockwise direction along the clockwise-wound tooth portion of each set of tooth portions and then continuously extends to the counterclockwise-wound tooth portion to be wound in a counterclockwise direction. And the first lead wire and the second lead wire are respectively led out and exposed from the inside to the outside of each stator slot.

[0008] For the motor stator structure described above, wherein: the plurality of coil groups are connected into a star winding.

[0009] For the motor stator structure described above, wherein: the plurality of coil groups are connected into a delta winding.

[0010] For the motor stator structure described above, wherein: a hollow accommodating space is provided in the center of the stator core, a rotor is provided in the accommodating space, the rotor is provided with a plurality of magnetic members, and the cooperation between the stator slots of the stator core and the plurality of magnetic members of the rotor is 12 slots and 10 poles or 12 slots and 14 poles.

[0011] For the motor stator structure described above, wherein: the stator core is an inner-rotor type stator core or an outer-rotor type stator core.

[0012] By means of the sequential clockwise and counterclockwise alternating winding of each coil group wound on each set of tooth portions of the present utility model, the winding directions of the plurality of coil groups are made consistent, and the lead wires of each coil group are led out from the inside of each stator slot, so that the plurality of lead wires can be evenly distributed, and it is easier to identify and not easy to weld wrongly during welding, thereby effectively improving the assembly production efficiency and enhancing the overall quality. Description of the Drawings

[0013] Figure 1A It is a three-dimensional schematic diagram of a conventional motor stator.

[0014] Figure 1B It is a developed schematic diagram of a coil group of a conventional three-phase 12-slot 10-pole.

[0015] Figure 2 It is a three-dimensional schematic diagram of the inner-rotor type motor stator structure of the present utility model.

[0016] Figure 3It is an unfolded schematic diagram of a coil group with three phases, 12 slots and 10 poles of the present utility model.

[0017] Figure 4 It is a schematic diagram of the delta connection of a coil group with three phases, 12 slots and 10 poles of the present utility model.

[0018] Explanation of reference numerals: Motor stator structure - 2; Stator core - 21; Six groups of tooth parts - 2111, 2112, 2113, 2114, 2115, 2116; Clockwise winding tooth part - 2121; Counterclockwise winding tooth part - 2122; Pole shoe - 213; Ring part - 214; Stator slot - 215; Accommodating space - 216; First, second, third, fourth, fifth, and sixth coil groups - 221, 222, 223, 224, 225, 226; First lead - 2271; Second lead - 2272; Winding segment - 2273. Detailed implementation manners

[0019] The above object, structure and functional characteristics of the present utility model will be described with reference to the preferred embodiments shown in the accompanying drawings.

[0020] The present utility model provides a motor stator structure 2. Please refer to Figure 2 、 Figure 3 , the motor stator structure 2 is applied to an electric motor (such as a fan motor or a pump motor), which can be an outer rotor type motor or an inner rotor type motor. In this embodiment, the motor stator structure 2 is applied to a three-phase fan motor which is an inner rotor type. The fan motor has a 12-slot 10-pole structure, and it includes a stator (i.e., the motor stator structure 2) and a rotor with a plurality of magnetic members located inside the stator, but it is not limited thereto.

[0021] The motor stator structure 2 includes a stator core 21 and a plurality of coil groups. The stator core 21 includes six groups of tooth parts 2111, 2112, 2113, 2114, 2115, 2116 and a ring part 214. Each group of tooth parts has a clockwise winding tooth part 2121 and a counterclockwise winding tooth part 2122. That is, the clockwise winding tooth parts 2121 and the counterclockwise winding tooth parts 2122 of the six groups of tooth parts 2111, 2112, 2113, 2114, 2115, 2116 are sequentially arranged at intervals along a circumference inside the ring part 214. In this embodiment, six clockwise winding tooth parts 2121 and six counterclockwise winding tooth parts 2122 are equidistantly arranged at intervals and radially extend inward from an inner circumferential side of the ring part 214. And a free end of each of the clockwise winding tooth part and the counterclockwise winding tooth part of each group of tooth parts has a pole shoe 213 formed outward from both sides of the free end of the respective tooth part.

[0022] Each set of tooth portions and the clockwise tooth portions 2121 and counterclockwise tooth portions 2122 of two adjacent sets of tooth portions together define a stator slot 215 therebetween. In this embodiment, six sets of tooth portions 2111, 2112, 2113, 2114, 2115, 2116 together define twelve stator slots 215. For example, the first stator slot 215 is located between the clockwise tooth portion and the counterclockwise tooth portion of the first set of tooth portions, the second stator slot 215 is located between the counterclockwise tooth portion 2122 of the first set of tooth portions 2111 and the clockwise tooth portion 2121 of the adjacent second set of tooth portions 2112, and the formation positions of the remaining third stator slot 215 to the twelfth stator slot 215 are arranged in sequence, and so on.

[0023] And the stator core 21 is an inner-rotor type stator core 21, which has a hollow accommodation space 216 at its center. The accommodation space 216 communicates with the plural stator slots 215 of the six sets of tooth portions 2111, 2112, 2113, 2114, 2115, 2116 for accommodating the rotor. And the magnetic poles (N poles and S poles) of the plural magnetic members arranged on the outer peripheral side of the rotor and the plural stator slots 215 of the stator core 21 are matched as 12 slots and 10 poles. However, it is not limited thereto. In a specific implementation, the fan motor may be a 12-slot and 14-pole structure, that is, the plural stator slots 215 of the stator core 21 and the magnetic poles of the plural magnetic members of the rotor are matched as 12 slots and 14 poles.

[0024] Please refer back to Figure 2 , Figure 3 , the plural coil groups are wound around the clockwise tooth portions 2121 and the counterclockwise tooth portions 2122 of each set of tooth portions in sequence in the clockwise and counterclockwise directions (as Figure 3 shown, clockwise represents the clockwise winding direction, and counterclockwise represents the counterclockwise winding direction) along the arrangement direction of the six sets of tooth portions 2111, 2112, 2113, 2114, 2115, 2116 of the ring portion 214 (as Figure 3 shown, the reference numerals 1 to 12 represent the arrangement order of the tooth portions). In this embodiment, the plural coil groups are six sets of coils 221, 222, 223, 224, 225, 226, which are sequentially matched with the six sets of tooth portions 2111, 2112, 2113, 2114, 2115, 2116, that is, the first set of coils 221 is wound around the first set of tooth portions 2111, the second set of coils 222 is wound around the second set of tooth portions 2112, and so on). And the plural coil groups are three-phase concentrated windings with a parallel branch of 2 for winding description.

[0025] And each coil group (i.e., the first to sixth coil groups 221, 222, 223, 224, 225, 226) has a first lead 2271, a second lead 2272, and a winding segment 2273 located between and connected to the first lead 2271 and the second lead 2272. The winding segment 2273 of each coil group winds along the clockwise-winding teeth 2121 of each group of teeth in a clockwise direction and then continues to wind along the counterclockwise-winding teeth 2122 in a counterclockwise direction, and the first lead 2271 and the second lead 2272 are respectively led out and exposed from the inside to the outside of each stator slot 215. For example Figure 3 As shown, the first lead 2271 of the first coil group 221 is exposed above the first stator slot between the clockwise-winding teeth 2121 and the counterclockwise-winding teeth 2122 of the first group of teeth 2111. Then, the winding segment 2273 of the first coil group 221 winds in a clockwise direction along the right side, bottom side, left side, and top side of the clockwise-winding teeth 2121 in sequence. Then, the winding segment 2273 of the first coil group 221 crosses from the top side of the clockwise-winding teeth 2121 to the left side of the adjacent counterclockwise-winding teeth 2122 and winds in a counterclockwise direction along the left side, bottom side, right side, and top side of the counterclockwise-winding teeth 2122 of the first group of teeth 2111 in sequence. Finally, the second lead 2272 of the first coil group 221 is led out and protruded from the inside to the outside of the second stator slot 215 between the counterclockwise-winding teeth 2122 of the first group of teeth 2111 and the clockwise-winding teeth 2121 of the adjacent second group of teeth 2112, so that the first lead 2271 and the second lead 2272 of the first coil group 221 are respectively led out and exposed from the inside to the outside of the first and second stator slots 215.

[0026] The second to sixth coil groups 222, 223, 224, 225, 226 are wound in sequence on the clockwise-winding teeth 2121 and the counterclockwise-winding teeth 2122 of their respective corresponding second to sixth groups of teeth 2112, 2113, 2114, 2115, 2116 in the same winding manner and direction as the above-mentioned first coil group 221, and will not be repeated here. Therefore, only the leads of each coil group are led out and exposed from the inside to the outside of each stator slot 215, so that only a single lead is led out from each stator slot 215 and there are a total of twelve leads. With such a setting, not only can the leads (taps) of the coil groups be effectively distributed evenly and easily identified, but also there will be no mistakes when soldering to a printed circuit board (PCB). Therefore, the assembly production efficiency and the production volume of the motor can be effectively improved. In addition, since only a single lead is led out from each stator slot 215 and the number is appropriate, the pads can be distributed evenly when planning and designing the circuit board, achieving the effect of convenient design. And the winding directions of the plurality of coil groups are the same, so that the winding procedure of the stator on a winding machine is not complicated and can be replicated, effectively reducing uncontrollable factors and thus effectively improving the product quality.

[0027] And the above-mentioned present embodimentFigure 2 In order to clearly see that the plurality of coil groups are wound around the forward-wound tooth portions 2121 and reverse-wound tooth portions 2122 of the plurality of tooth portions, the upper insulating frame and the lower insulating frame that are connected to each other (plug-connected) are respectively provided on the top side and the bottom side of each group of tooth portions and are omitted from drawing. In specific implementation, each coil group is wound in a manner of being wound on the upper and lower insulating frames of each group of tooth portions or on the upper and lower insulating frames plus slot paper. Alternatively, the upper and lower insulating frames may not be provided, and the stator core 21 is directly coated on the entire outer side by means of injection molding of insulating materials, so that each coil group is directly wound on each group of tooth portions coated with an insulating layer, effectively achieving the effects of reducing the stator thickness and increasing the number of wound coils. This is hereby stated first.

[0028] In addition, the first and second wire heads 2271 and 2272 of the plurality of coil groups (i.e., the first to sixth coil groups 221, 222, 223, 224, 225, 226) wound around the six groups of tooth portions 2111, 2112, 2113, 2114, 2115, 2116 of the stator core 21 can be designed to be connected in a star (Y-shaped) winding connection or a delta (triangle-shaped) winding connection according to the power and torque requirements of the motor. For example, for a delta (triangle-shaped) winding connection example, please refer to Figure 4 , the first wire head 2271 of the first coil group 221, the second wire head 2272 of the third coil group, the second wire head 2272 of the fourth coil group 224, and the first wire head 2271 of the sixth coil group 226 are commonly connected to form a U-phase terminal. The first wire head 2271 of the third coil group 223, the first wire head 2271 of the second coil group 222, and the second wire heads 2272 of the fifth and sixth coil groups 225 and 226 are commonly connected to form a W-phase terminal. The second wire heads 2272 of the first and second coil groups 221 and 222 and the first wire heads 2271 of the fourth and fifth coil groups 224 are commonly connected to form a V-phase terminal, thereby jointly forming the delta (triangle-shaped) winding, and the U, V, and W phase terminals are used as power supply terminals.

[0029] Although the motor stator structure 2 of the above embodiment is applied to an inner-rotor type three-phase fan motor, it is not limited thereto. In another alternative embodiment, the motor stator structure 2 can be applied to an outer-rotor type three-phase fan motor, and the stator core 21 is an outer-rotor type stator core 21, so that the rotor is located outside the motor stator structure 2.

[0030] Therefore, by winding each coil group in sequence around the forward-wound tooth portions 212 and reverse-wound tooth portions 2122 of each group of tooth portions in a clockwise and counterclockwise alternating manner, only one wire head is led out from each stator slot 215, which not only makes the wire heads of the plurality of coil groups evenly distributed as a whole, but also makes them easier to identify and less likely to be soldered incorrectly when soldering on the circuit board, thereby further improving the assembly production efficiency and the overall quality.

Claims

1. A motor stator structure, characterized in that, Comprising: A stator core, including six sets of tooth portions and a ring portion. Each set of tooth portions has a forward-wound tooth portion and a reverse-wound tooth portion. The forward-wound tooth portions and the reverse-wound tooth portions of the six sets of tooth portions are sequentially and alternately arranged at intervals along a peripheral edge within the ring portion, and the forward-wound tooth portions and the reverse-wound tooth portions of each set of tooth portions and the adjacent two sets of tooth portions together define a stator slot; and A plurality of coil groups, which are sequentially wound in a clockwise and counterclockwise direction alternately along the arrangement direction of the six sets of tooth portions of the ring portion on the forward-wound tooth portions and the reverse-wound tooth portions of each set of tooth portions. Each coil group has a first lead wire, a second lead wire and a winding segment. The winding segment is located between the first lead wire and the second lead wire and is connected. The winding segment of each coil group is wound in a clockwise direction along the forward-wound tooth portion of each set of tooth portions and continues to extend to the reverse-wound tooth portion to be wound in a counterclockwise direction, and the first lead wire and the second lead wire are respectively led out and exposed from the inside to the outside of each stator slot.

2. The motor stator structure according to claim 1, wherein: The plurality of coil groups are connected into a star winding.

3. The motor stator structure according to claim 1, characterized in that: The plurality of coil groups are connected into a delta winding.

4. The motor stator structure according to claim 1, characterized in that: A hollow accommodating space is provided at the center of the stator core, and a rotor is provided in the accommodating space. The rotor is provided with a plurality of magnetic members, and the cooperation between the stator slots of the stator core and the plurality of magnetic members of the rotor is 12 slots 10 poles or 12 slots 14 poles.

5. The motor stator structure according to claim 1, characterized in that: The stator core is an inner-rotor type stator core or an outer-rotor type stator core.

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