JP3712119B2 - Winding method to stator core - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a winding method around a stator core used in a rotating electric machine.
[0002]
[Prior art]
As a winding method to a stator core used in a rotating electric machine such as a motor, U, V, and the like are passed through a conducting wire guide tube arranged at the center of the stator core and further through three nozzles radially extending from the tip portion thereof. While discharging the conductive wire of each phase of W, the three guide nozzles are rotated around the corresponding internal teeth by swinging at a predetermined timing while reciprocating the conductive wire guide tube in the axial direction of the stator core. A direct winding method in which a conductive wire is directly wound is known. Further, star connection and double star connection are known as methods for connecting the ends of the conductive wires wound around the stator core.
[0003]
FIG. 7 is an electric circuit diagram of a star connection which is a conventional general method, and FIG. 8 is a wiring diagram thereof. In FIG. 7, U, V, and W indicate end portions of the U phase, the V phase, and the W phase, respectively, and 1 to 6 indicate coils that are wound around the inner teeth of the stator core. Conductive wires Lu, Lv, and Lw of each phase are connected to a coil of each phase arranged in parallel by two, and then connected at a neutral point COM. A rotating magnetic field is formed by a current flowing sequentially between the conductors Lu and Lv, between the conductors Lv and Lw, and between the conductors Lw and LU.
[0004]
As shown in FIG. 8, in this example, a stator core S having six internal teeth T1 to T6 is used, and two coils of each phase U, V, W are arranged at positions facing each other. , Coils 1, 2, 3, 4, 5, 6 are arranged in this order. Further, connectors C1 to C3 are connected to the winding end portions of the conductive wires of the respective phases, and are connected to an electric circuit (not shown). Further, the winding start ends of the conductive wires of the respective phases are connected to each other to form a neutral point COM.
[0005]
[Problems to be solved by the invention]
However, in the above-described conventional winding method, since the conducting wires are individually wound around the inner teeth T1 to T6 of the stator core S, there are a total of 12 ends of the conducting wires, of which 6 conducting wires are connected to the neutral point. Therefore, there is a problem that it takes time for the wiring work.
[0006]
In addition, since the conductive wires are individually wound around the inner teeth T1 to T6 of the stator core S, it is necessary to perform the holding and cutting operation of the winding wire end portions at the start and end of winding for each inner tooth, and the winding work also takes time. There was a problem.
[0007]
Accordingly, an object of the present invention is to provide a method for winding a stator core used in a rotating electrical machine that can perform a winding operation and a wiring operation more efficiently.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a method for winding a stator core used in a rotating electrical machine, wherein the winding start ends of the lead wires of U, V, and W phases are mounted on the stator core in advance. A first holding frame provided at a predetermined position of the frame is held, and in that state, the conductors of each phase of U, V, W are continuously wound around the corresponding internal teeth, and for one internal tooth After the end of winding, the operation of crossing the lead wire to the winding start position of the next internal tooth is performed on the end surface opposite to the end surface holding the winding start end, and the coil is formed on the next internal tooth Before winding, the connecting wire is pulled out to the outside of the stator core to be a lead end, and the winding end end of the conductor is on the same end surface side as the first holding portion, Is held by a second holding portion provided at a position separated by a predetermined angle, and the first holding portion is And attaching a connecting terminal to the second holding portion, the ends of the U, V, and W phases held by the holding portions are electrically connected to form a neutral point. The present invention provides a winding method around a stator core, wherein a lead terminal for connecting an electric circuit is attached to each end of the lead drawn out to the outside.
[0009]
According to the present invention, the ends of the winding start and the winding end of the conducting wire are held by the first holding frame and the second holding frame provided on the insulating frame previously mounted on the stator core, and after the end of winding, Since the neutral terminal is formed by attaching the connecting terminal to the first holding frame and the second holding frame, the connection work for forming the neutral point can be automated and efficiently performed. In addition, when winding around a plurality of internal teeth for each phase of U, V, W, it is possible to continuously wrap each phase around a plurality of internal teeth. Before carrying out the winding for forming, the connecting wire was pulled out to the outside of the stator core to be the lead end, and the lead terminals for connecting the electric circuit were respectively attached to the lead end. There is no need to bundle the terminals and attach the lead terminals for connecting the electric circuit.
[0010]
According to a preferred aspect of the present invention, an angle formed between adjacent internal teeth of the stator core from a position where the first holding portion and the second holding portion face each other by 180 degrees with respect to the center of the stator core. It is provided at a position shifted by half.
[0011]
According to the above aspect, the length from the first holding portion to the inner teeth to be wound at the beginning of the winding of the conducting wire, the length from the inner teeth wound at the end of the winding of the conducting wire to the second holding portion, And the sum of the lengths of the crossover wires that move to the next inner tooth after the winding of one inner tooth (the sum of all of the U, V, and W phases) can be minimized. As a result, the winding work can be speeded up.
[0012]
According to another preferable aspect of the present invention, the first holding part and the second holding part have a frame-shaped rib formed integrally with the insulating frame, and the edge of the rib A holding groove for inserting and holding the winding start or winding end of the lead wire of each phase of U, V, and W is formed, and the connecting terminal is shaped to fit inside the rib, and the lead wire And has a contact groove for breaking the insulating coating and conducting.
[0013]
According to the above aspect, the winding start or winding end of the lead wire of each phase of U, V, and W can be held by simply inserting it into the holding groove of the frame-shaped rib, and inside the frame-shaped rib. By simply inserting the connecting terminal, the conducting wire held in the holding groove can be press-fitted into the contact groove of the connecting terminal, and the insulating coating of the conducting wire can be broken to make it conductive.
[0014]
According to a further preferred aspect of the present invention, when the connecting wire is wound around the next inner tooth, the connecting wire is wound around the inner tooth a predetermined number of times in the direction opposite to the original winding direction, and then the connecting wire is placed outside the stator core. Pull out, and then insert the crossover wire again into the pulled out slot and wind it in the original winding direction.
[0015]
According to the above aspect, since the connecting wire is drawn out from the same slot, the operation of binding the drawn connecting wire and attaching the terminal or the like becomes easy, and the workability of the lead wire processing can be improved.
[0016]
According to a further preferred aspect of the present invention, the reverse winding is set to 1 to 3, and the number of windings in the original winding direction is set to be larger by the number of the reverse windings.
[0017]
According to the above aspect, by setting the reverse winding to 1 to 3, the loss of electromagnetic force due to the reverse winding is minimized, and the number of windings in the original winding direction is set to be larger by the number of reverse windings. Therefore, the required electromagnetic force can be ensured.
[0018]
According to a further preferred aspect of the present invention, a tube is placed on the outer periphery of the pulled-out connecting wire and bound, and a terminal is attached to the lead end protruding from the tube.
[0019]
According to the above aspect, the lead wire can be protected by covering the outer periphery of the lead-out connecting wire, and the terminal to the lead wire is attached by attaching the terminal to the lead end portion of the connecting wire protruding from the tube. Can be easily and reliably performed.
[0020]
Embodiment
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 to 6 show an embodiment of a winding method according to the present invention. FIG. 1 is a perspective view of a stator core wound by the method of the present invention, as viewed from the end face on the winding start and winding end side, and FIG. 2 is a plan view of the stator core viewed from the end face on the winding start and winding end side. Is a bottom view of the stator core as viewed from the end face on the crossover side, FIG. 4 is a partially enlarged perspective view showing a state in which a neutral point is formed by the connecting terminal, FIG. 5 is a perspective view showing the connecting terminal, and FIG. It is an electric circuit diagram of a double star connection employed in the winding method.
[0021]
The winding method of the present invention is performed using a winding device that forms a coil by winding a conductive wire directly around the inner teeth of a stator core. As such a winding device, for example, a device described in Japanese Patent No. 2813556 by the present applicant can be used.
[0022]
In addition, the winding device used in the present invention has a structure as shown in the above publication, and extends radially at the same angle with respect to the guide tube at the tip of the guide tube disposed at the center of the stator core. It is preferable to use three nozzles that are capable of simultaneously winding the three inner teeth corresponding to each phase while simultaneously feeding the U, V, and W lead wires from these nozzles. .
[0023]
As shown in FIGS. 2 and 3, the stator core S used in this embodiment has six internal teeth T1 to T6, and a slot D for accommodating a coil is formed between the internal teeth. A resin insulating frame P is inserted in the inner periphery of each slot D. The insulating frame P has a shape that fits the inner periphery of the slot D, and both ends of the stator core S in the axial direction protrude from the end face of the stator core S to form ribs R for holding a crossover or the like. .
[0024]
As shown in FIGS. 2 and 4, the outer periphery of the rib R is half the angle formed by the adjacent inner teeth of the stator core S from a position facing the center of the stator core S by 180 degrees (in this embodiment). The first holding part 11 and the second holding part 12 are formed at an angle shifted by 30 degrees) (150 degrees in this embodiment). The first holding unit 11 is positioned at the center of the internal tooth T2 around which the V-phase conductive wire Lv is wound for the first time, and the second holding unit 12 has the V-phase conductive wire Lv wound for the second time. It is located at the end on the winding end side of the inner teeth T5 to be lined.
[0025]
Each holding part 11, 12 is constituted by a frame-shaped rib 13 having a rectangular opening, and the edges of this rib 13 are used to hold the conductors Lu, Lv, Lw of the U, V, W phases. A holding groove 14 is formed. Although only the second holding part 12 is shown in FIG. 4, the first holding part 11 has substantially the same structure.
[0026]
In the winding method of the present invention, first, as shown in FIGS. 1 and 2, the winding start ends of the conductive wires Lu, Lv, and Lw of U, V, and W are held by the first holding unit 11. The groove 14 is inserted and held. In this state, the nozzle that feeds the conducting wire Lu of the winding device (not shown) is arranged in the slot adjacent to the internal tooth T1, and the nozzle that feeds the conducting wire Lv is arranged in the slot adjacent to the internal tooth T2, and the conducting wire Lw is connected. The feeding nozzle is arranged in a slot adjacent to the internal tooth T3. Then, the guide cylinder of the winding device swings at a predetermined angle while reciprocating in the axial direction, and each nozzle circulates corresponding internal teeth T1, T2, T3, and around the internal teeth T1, T2, T3. The conducting wires Lu, Lv, and Lw are wound around the first, second, and third coils of U, V, and W phases.
[0027]
Thus, when the winding to the first internal teeth T1, T2, T3 is completed, as shown in FIG. 3, the stator core S in which the first holding portion 11 and the second holding portion 12 are not provided. The conducting wires Lu, Lv, and Lw are drawn from the end face, and the winding nozzle rotates relative to the stator core S and moves to a slot adjacent to the inner teeth T4, T5, and T6 to be wound next.
[0028]
At this time, the connecting wire is routed along the outer periphery of the rib R of the insulating frame P in FIG. 1, but is pulled out by a clamp (not shown) in the middle and turned back, thereby leading to the lead terminals 20u, 20v, 20w. Lead end portions Eu, Ev, and Ew for connecting are formed.
[0029]
Thus, after the winding nozzle (not shown) is moved to the slot adjacent to the inner teeth T4, T5, T6 to be wound next, the winding nozzle is rotated around the corresponding inner teeth T4, T5, T6. By moving, the conductive wires Lu, Lv, Lw are wound around the internal teeth T4, T5, T6 to form the second coils 4, 5, 6 of U, V, W phase.
[0030]
After the winding of the second coils 4, 5, 6 is completed, the winding end ends of the conducting wires Lu, Lv, Lw are held by a clamp (not shown) and inserted into the holding groove 14 of the second holder 12 shown in FIGS. And hold it.
[0031]
Next, the connecting terminal 30 is inserted into the first holder 11 and the second holder 12. As shown in FIG. 5, the connecting terminal 30 is connected by a connecting band 32 and has three pushing portions 33 that fit inside the ribs 13 of the holding portions 11 and 12. Contact grooves 31u, 31v, 31w for introducing the conducting wires Lu, Lv, Lw of the respective phases are provided.
[0032]
Then, when this connecting terminal 30 is pushed into the inside of the rib 13 of the first holder 11 and the second holder 12, the corresponding conducting wires Lu, Lv, Lw are press-fitted into the contact grooves 31u, 31v, 31w, and their insulation The coating is broken and is electrically connected to the connecting terminal 30. As a result, the conducting wires Lu, Lv, and Lw of each phase are short-circuited via the connection terminal 30, and a neutral point described later is formed. Note that when the connecting terminal 30 is pushed in, a cutter (not shown) is activated, and the ends of the conducting wires Lu, Lv, and Lw protruding from the holding grooves 14 of the first holder 11 and the second holder 12 are moved as shown in FIG. Cut.
[0033]
On the other hand, lead terminals 20u, 20v, and 20w are attached to the lead end portions Eu, Ev, and Ew that are extended from the opposite end face of the stator core S. That is, in the case of this embodiment, the lead terminals 20u, 20v, 20w have U-shaped claws 21, and the lead end portions Eu, Ev, Ew are inserted between the claws 21, and the claws 21 are crimped. Can be installed by caulking.
[0034]
The lead terminals 20u, 20v, and 20w thus attached are further integrated by being inserted into a connector housing 23 called a cluster, and can be connected to a wiring connector of an electric circuit (not shown) with one touch.
[0035]
The electric circuit of the stator core S wound in this way forms a double star connection circuit as shown in FIG. That is, after the lead wires Lu, Lv, and Lw connected to the lead terminals 20u, 20v, and 20w are connected in parallel to the pair of coils 1 and 4, 2, 5, 3, and 6 provided for each phase. The first neutral point COM1 and the second neutral point COM2 are connected to each other. That is, the first neutral point COM1 is formed by conducting the winding start end of the conducting wires Lu, Lv, Lw through the first holding groove 11 at the connection terminal 30, and the second neutral point COM2 is The winding end ends of the conducting wires Lu, Lv, and Lw are electrically connected to each other by the connecting terminal 30 in the second holding groove 12.
[0036]
Thus, according to the present invention, the first holding portion 11, the first holding portion 11, the winding start end portion and the winding end end portion of each phase of the conducting wires Lu, Lv, Lw formed on one end face of the insulating frame P, The first neutral point COM1 and the second neutral point COM2 can be formed by simply holding the two holding portions 12 and pushing the connecting terminal 30 into the holding portions 11 and 12, respectively. Further, by forming the lead end portions Eu, Ev, Ew in the middle of the crossover and attaching the lead terminals 20u, 20v, 20w thereto, the lead-side connection can be easily performed.
[0037]
9 and 10 show another embodiment of the winding method according to the present invention.
This embodiment is different from the previous embodiment in the step of drawing out the connecting wire to form a lead wire. Since the other steps are the same as those in the above embodiment, the connecting wire processing step will be described in detail, and the other steps will be omitted.
[0038]
As described above, the conductive wires Lu, Lv, and Lw are wound around the inner teeth T1, T2, and T3 to form the first coils 1, 2, and 3 of the U, V, and W phases, and then, as shown in FIG. As described above, the conductors Lu, Lv, Lw are drawn from the end face of the stator core S where the first holding part 11 and the second holding part 12 are not provided, and the winding nozzle is relative to the stator core S. To the slot adjacent to the inner teeth T4, T5, T6 to be wound next.
[0039]
In this embodiment, the connecting wire is not pulled out outward by clamping in the above-described stage, but the connecting wire is applied to the corresponding internal teeth T4, T5, and T6 a predetermined number of times, preferably 1 to 3 times, more preferably. Reverses only once. In this embodiment, reverse winding is performed once.
[0040]
That is, referring to FIGS. 9 and 10 together, the conducting wire Lu is inserted into the slot D4a adjacent to the inner tooth T4, taken out from the slot D4b on the opposite side of the inner tooth T4, and then pulled outward by the clamp and folded back. As a result, the lead end Eu is formed. Then, the folded lead Lu is returned to the slot D4b drawn out above, and this time it is wound in the original winding direction to form the U-phase second coil 4.
[0041]
Similarly, the lead wire Lv is inserted into the slot D5a adjacent to the inner tooth T5, taken out from the slot D5b on the opposite side of the inner tooth T5, and then pulled out outward by a clamp to be folded, thereby forming a lead end Ev. To do. Then, the folded lead Lu is returned to the slot D5b drawn out above, and this time it is wound in the original winding direction to form the V-phase second coil 5.
[0042]
Similarly, the lead wire Lw is inserted into the slot D6a adjacent to the internal tooth T6, taken out from the slot D6b on the opposite side of the internal tooth T6, and then pulled out outward by a clamp to be folded, thereby forming a lead end Ew. To do. Then, the folded lead wire Lu is returned to the slot D6b drawn out above, and this is wound in the original winding direction to form the W-phase second coil 6.
[0043]
In addition, it is preferable that the number of windings in the original winding direction is set to be larger by the number of reverse windings. That is, since the electromagnetic force required for driving is weakened by the reverse direction winding, it is desired to secure the required electromagnetic force by increasing the number of windings in the original winding direction accordingly.
[0044]
Then, after the winding of the second coils 4, 5, 6 is completed, the winding end ends of the conducting wires Lu, Lv, Lw are held by a clamp (not shown) as in the above embodiment, and the first shown in FIGS. 2 Insert and hold in the holding groove 14 of the holder 12. Further, the connection terminal 30 is inserted into the first holder 11 and the second holder 12.
[0045]
In this embodiment, as shown in FIG. 10, the drawn lead wire Lu is folded back at the lead end Eu, and the bases thereof are drawn from the same position of the slot D4b and aligned in parallel. Further, since the base portion of the drawn lead wire Lu is firmly fixed by the coil 4 formed by being wound in the original winding direction, the lead portion is drawn from one place. For this reason, the lead end portion Eu can be easily passed through the protective tube 40, and workability is improved.
[0046]
Then, the lead end Eu of the conducting wire Lu is protruded from the other end of the tube 40, and a terminal, in this embodiment, the receptacle contact 41 is attached to the lead end Eu. Further, the receptacle contact 41 mounted on the lead end Eu is inserted into the corresponding slot 43 of the housing 42 to form a connector 44. The connector 44 is electrically connected by inserting a pin terminal of a mating connector (not shown) into the receptacle contact 41. In addition, the above is the same also about the other conducting wires Lv and Lw.
[0047]
In each of the above embodiments, the winding method of the present invention is applied to the stator core S having a total of six inner teeth T1 to T6. However, the present invention is a multiple of 3 such as a total of nine and twelve. It can be applied to any stator core having one internal tooth.
[0048]
The winding method of the present invention is particularly suitable for winding on a stator core for a DC brushless motor.
[0049]
【The invention's effect】
As described above, according to the present invention, the ends of the winding start and end of the conducting wire are held by the first holding frame and the second holding frame provided on the insulating frame previously mounted on the stator core, Since the connection point is mounted on the first holding frame and the second holding frame after the winding is completed so as to form a neutral point, the connection work for forming the neutral point is automated and efficient. It can be carried out. In addition, when winding around a plurality of internal teeth for each phase of U, V, W, it is possible to continuously wrap each phase around a plurality of internal teeth. Before carrying out the winding for forming, the connecting wire was pulled out to the outside of the stator core to be the lead end, and the lead terminals for connecting the electric circuit were respectively attached to the lead end. There is no need to bundle the terminals and attach the lead terminals for connecting the electric circuit.
[Brief description of the drawings]
FIG. 1 is a perspective view of a stator core wound by the method of the present invention as viewed from the end face on the winding start and winding end side.
FIG. 2 is a plan view of the stator core as viewed from the end surface on the winding start and winding end side.
FIG. 3 is a bottom view of the stator core as viewed from the end surface on the crossover side.
FIG. 4 is a partially enlarged perspective view showing a state in which a neutral point is formed by a connection terminal.
FIG. 5 is a perspective view showing the connection terminal.
FIG. 6 is an electric circuit diagram of a double star connection employed in the winding method of the present invention.
FIG. 7 is an electric circuit diagram of a star connection which is a conventional general method.
FIG. 8 is a wiring diagram of the star connection.
FIG. 9 is another embodiment of the present invention, and is a bottom view as seen from the end face on the crossover side of the stator core.
FIG. 10 is a perspective view showing a method of processing a lead wire according to the embodiment, as viewed from the end surface on the crossover side of the stator core.
[Explanation of symbols]
1 to 6 Coil 11 First holding portion 12 Second holding portion 13 Rib 14 Holding groove 20 Lead terminal 30 Connecting terminal 31u, 31v, 31w Contact groove 40 Tube 41 Receptacle contact S Stator core P Insulating frame R Rib Lu, Lv , Lw Lead wire COM1, COM2 Neutral point Eu, Ev, Ew Lead end

Claims (6)

In a winding method around a stator core used in a rotating electrical machine, a first holding in which a winding start end portion of a lead wire of each phase of U, V, and W is provided at a predetermined position of an insulating frame previously attached to the stator core In this state, the windings of the U, V, and W phases are continuously wound around the corresponding internal teeth, and after the winding of one internal tooth is completed, the winding of the next internal tooth is performed. The operation of crossing the conducting wire to the wire start position is performed on the end surface opposite to the end surface holding the winding start end portion, and before the winding for forming the coil is performed on the next inner tooth, the connecting wire Is pulled out to the outside of the stator core to be a lead end, and a winding end end of the conducting wire is provided on the same end face side as the first holding part, and is provided at a position separated from the first holding part by a predetermined angle. And holding terminals on the first holding part and the second holding part. By doing so, the ends of the U, V, and W conducting wires held by the holding portions are made conductive to form a neutral point, and an electrical circuit connection is made to the lead ends drawn to the outside of the stator core. A winding method for a stator core, characterized in that each lead terminal is mounted. The first holding part and the second holding part are provided at a position shifted by a half of the angle formed by the adjacent inner teeth of the stator core from a position facing the center of the stator core by 180 degrees. The method for winding a stator core according to claim 1. The first holding portion and the second holding portion have frame-shaped ribs integrally formed with the insulating frame, and the U, V, and W phase conductors are formed on the edges of the ribs. A holding groove for inserting and holding the winding start or winding end end is formed, and the connection terminal has a shape that fits inside the rib, and the conductive wire is introduced to break the insulation coating and conduct. The winding method to the stator core of Claim 1 or 2 which has a contact groove to make. When winding the connecting wire around the next inner tooth, after winding the connecting wire a predetermined number of times in the direction opposite to the original winding direction, the connecting wire is drawn out of the stator core, and then the connecting wire is put into the drawn out slot. The winding method to the stator core according to any one of claims 1 to 3, wherein the winding is performed again in the original winding direction. The winding method to a stator core according to claim 4, wherein the number of turns in the original winding direction is set to be larger by the number of turns in the reverse direction. The winding method to a stator core according to claim 1, wherein a tube is put on the outer periphery of the pulled-out connecting wire to be bound, and a terminal is attached to the lead end protruding from the tube.

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