JP2005110431A - Stator, motor, manufacturing method of stator, and manufacturing method of motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator which is formed by an insert method, for a shorter winding at a coil end part, resulting in a motor of low cost, compact, low loss, and high output, and also to provide a motor using the same, a manufacturing method suitable for manufacturing a stator like this, and a manufacturing method of the motor using the same. <P>SOLUTION: A stator 20 has U-phase, V-phase, and W-phase coils 51, 61, and 71, which are formed in advance, inserted in U-phase, V-phase, and W-phase slots 34u, 34v, and 34w of an iron core 30 comprising a surface 30A and a backside 30B. In the stator 20, the peripheral length of the U-phase coil 51 becomes longer as a turn comes inside while the peripheral length of the W-phase coil 71 becomes shorter as a turn comes inside. Coil ends 58A, etc. of respective phases are tightly contacted each other through insulating papers 81 and 82 while a prescribed relationship is kept at first and second axial directions DX1 and DX2 of the slots 34u, etc. of respective phases. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a stator in which a coil having a coil formed in advance on a stator iron core is inserted into a stator iron core having an internal tooth shape, a motor using the stator, and a stator in which a coil having coils previously formed in a stator iron core is inserted. The present invention relates to a manufacturing method and a motor manufacturing method using the same.

  Conventionally, a coil is formed by winding a winding in advance, and this is sandwiched between blades, and the coil is inserted using a stripper, and the coil is inserted into a slot of the stator core to form a stator. A so-called insert method is known (see, for example, Patent Document 1).

JP 2003-164122 A

  By the way, in the insert method shown by patent document 1, when forming the coil of multiple phases (for example, three phases) in order, as shown in FIG. 10 of patent document 1, for example, the coil end part of the coil already inserted is Then, the diameter of the slot of the other phase is increased and deformed so as to be expanded outward from the radially outer end. This is because if the coil end portion of the coil that has already been inserted is positioned above the slot into which the coil is to be subsequently inserted, it is difficult to insert the coil to be subsequently inserted by the insert method.

However, in order to do this, it is necessary to set the winding length of the coil end portion longer in consideration of the shape after the diameter is expanded, the volume of the coil end portion is increased, and the copper loss is increased. However, it does not always meet the demands for low-cost, compact, low-loss, high-power motors, such as increased weight and cost.
Conversely, in order to make the motor compact, it is desirable to make the winding length of the coil end portion as short as possible. Regarding the three-phase distributed winding stator, in order to make the U-phase, V-phase, and W-phase windings as short as possible, the optimum coil portion is considered in consideration of the relationship between the three-phase windings. It is desirable to select the circumference of the coil and the arrangement of the coil end portion.

By the way, in Patent Document 1, for example, when winding the circumference of a coil portion with a coil winding machine, the circumference is made longer or shorter in order, and this is inserted into the stator iron core, and the coil on the surface side An arrangement is described in which the end portion and the coil end portion on the back surface side are arranged symmetrically (see FIGS. 9 and 12 of Patent Document 1).
However, in the insert method, the winding pushed up by the stripper gets over the tip of the fixed blade whose tip position is fixed, so that the winding is inserted into the slot. It is difficult to make the coil end portions on the front surface side and the back surface side in the symmetrical form shown in the figure. For example, when inserted from the back side, the length of the coil end part on the front side is almost the same from the radially outer part (the part inserted earlier) to the radially inner part (the part inserted later). It becomes length. Therefore, even if the winding is formed by increasing or decreasing the circumference of the coil portion in order with the coil winding machine, the form of the coil end portion on the front surface side and the coil end portion on the back surface side are greatly different, and the surface side It was not possible to obtain an appropriate form on any of the back side.

  The present invention has been made in view of such problems, and while being a stator formed by an insert method, the length of the coil end portion winding is shortened, and is inexpensive, compact, low loss, high It is an object of the present invention to provide a stator that can be used as an output motor, and a motor using the stator. Another object of the present invention is to provide a stator manufacturing method suitable for manufacturing such a stator, and a motor manufacturing method using the same.

  The solution is composed of the above-mentioned inner teeth adjacent to each other among the ring-shaped, internal-tooth-shaped U-phase, V-phase, and W-phase three-phase distributed winding stator cores having a front surface and a back surface parallel thereto. A plurality of U-phase coils formed by winding a U-phase winding in advance in a U-phase slot, a V-phase slot, and a W-phase slot, a plurality of V-phase coils formed by winding a V-phase winding in advance, and A stator in which a plurality of W-phase coils formed by winding W-phase windings in advance are inserted in this order, and the first direction is the direction from the back surface to the front surface in the axial direction of the stator core. When the axial direction is the opposite, and the opposite is the second axial direction, the W-phase winding forming the W-phase coil has a W-phase slot insertion portion inserted into the W-phase slot forming a pair, and the pair Among the W-phase slots to be formed, the above stator iron A W-phase front side crossing part that crosses the surface of the W-phase, a W-phase back side crossing part that crosses the back side, the W-phase slot insertion part, and the W-phase front side crossing part, A W-phase surface side converging portion that consolidates windings extending from the W-phase slot insertion portion and connects them to the W-phase surface side crossing portion in the first axial direction of the slot; the W-phase slot insertion portion; W intervening between the W-phase back surface side crossover portion and integrating the windings extending from the W-phase slot insertion portion in the second axis direction of the W-phase slot to connect to the W-phase back surface side crossover portion A V-phase winding that forms a V-phase coil, and a V-phase slot that forms a pair and a V-phase slot that is inserted into each V-phase slot that forms a pair. V-phase surface side cross over the surface of the stator iron core, and A V-phase back side crossing portion that crosses the surface, a V-phase slot insertion portion, and a V-phase surface side crossing portion are interposed between the V-phase slot in the first axial direction of the V-phase slot. Interposing between the V-phase surface side converging part that consolidates the windings extending from the insertion part and connecting them to the V-phase surface side crossing part, the V-phase slot insertion part and the V-phase back side crossing part, A V-phase rear surface side converging portion that consolidates windings extending from the insertion portion in the V-phase slot in the second axis direction of the V-phase slot and connects them to the V-phase rear surface side crossing portion; The U-phase winding forming the phase coil crosses the surface of the stator iron core between the U-phase slot insertion portion inserted into the U-phase slot forming a pair and the U-phase slot forming the pair. U-phase front side crossover, U-phase backside crossover over backside, and U-phase The U-phase surface is interposed between the insertion portion in the slot and the U-phase surface side crossing portion, and the winding extending from the insertion portion in the U-phase slot is aggregated in the first axial direction of the U-phase slot. A U-phase surface side converging portion connected to the side crossover portion, and interposed between the U-phase slot insertion portion and the U-phase back side crossover portion, and in the second axis direction of the U-phase slot, the U-phase slot A U-phase back side converging part that consolidates windings extending from the internal insertion part and connects the U-phase back side crossing part to the U-phase back side crossing part, and a plurality of W phases of the W-phase coils on the surface of the stator core Each of the front side crossing portions is disposed radially outside the inner peripheral surface of the stator core and radially inside the radial center position of the U-phase slot and V-phase slot. The V-phase surface side crossover of the V-phase coil is In the first axis direction of the U-phase slot, the W-phase surface side crossing portion is in close contact with the W-W interphase insulating paper from the outside in the radial direction, radially outside the W-phase surface side crossing portion, and The W-phase slot and the U-phase slot are arranged radially inward of the radially outer ends, and the U-phase surface side crossover portions of the plurality of U-phase coils are all the first axis of the W-phase slot. In the direction, the V-phase surface side crossing portion is in close contact with the U-V interphase insulating paper from the outside in the radial direction, the V-phase surface side crossing portion is outside in the radial direction, and the V-phase slot and the W-phase Each of the W-phase back side crossover portions of the plurality of W-phase coils on the back surface of the stator core is arranged on the inner periphery of the stator core. Outside of the surface in the radial direction and the U phase The lot and the V-phase slot are arranged radially inward from the radial center position, and all of the V-phase back side crossover portions of the plurality of V-phase coils are in the second axis direction of the U-phase slot. The W-phase back side crossing portion is in close contact with the W-W interphase insulating paper from the outside in the radial direction, is radially outside the W-phase back side crossing portion, and the radial direction of the W-phase slot and the U-phase slot. The U-phase backside crossing portions of the plurality of U-phase coils are arranged on the radially inner side of the outer end, and all of the U-phase backside crossing portions of the U-phase coils are connected to the V-phase backside crossing portion in the second axis direction of the W-phase slot -Closely contacted from outside in the radial direction via the V-phase insulating paper, radially outward from the V-phase back side crossover portion, and the second axial direction at the radially outer end of the V-phase slot and W-phase slot It is the stator formed by.

In the stator according to the present invention, first, in the case of the W-phase coil, the W-phase front side crossing part and the W-phase back side crossing part across the paired W-phase slots are radially outward from the inner peripheral surface of the stator core. And it arrange | positions radially inside rather than the radial center position of a U-phase slot and a V-phase slot. That is, the W-phase front side crossing portion and the W-phase back side crossing portion are configured to cross over the front surface or the back surface inside the radial center position of the U-phase slot and V-phase slot.
Further, regarding the V-phase coil, the V-phase surface side crossing portion and the V-phase back side crossing portion that cross between the paired V-phase slots are more radial than the W-phase front side crossing portion or the W-phase back side crossing portion. It is arranged outside and radially inward from the radially outer ends of the W-phase slot and the U-phase slot. That is, the V-phase front side crossing portion and the V-phase back side crossing portion are configured to cross over the front surface or back surface near the radial center position of the W-phase slot and U-phase slot.
Further, with respect to the U-phase coil, the U-phase surface side crossover portion and the U-phase backside crossover portion that cross between the paired U-phase slots are more radial than the V-phase surface-side crossover portion or the V-phase backside crossover portion. It is arranged outside and in the first axial direction or the second axial direction of the radially outer ends of the W-phase slot and the U-phase slot. That is, the U-phase front side crossing portion and the U-phase back side crossing portion are configured to cross over the front surface or the back surface near the radially outer ends of the V-phase slot and the W-phase slot. Specifically, for example, the U-phase surface side crossing portion includes a portion located in the first axial direction at the radially outer ends of the V-phase slot and the W-phase slot.

  As described above, in the stator of the present invention, the W-phase surface side transition portion, the V-phase surface side transition portion, and the U-phase surface side transition portion, and the W-phase rear surface side transition portion, the V-phase rear surface side transition portion, and The U-phase back side crossing portions are arranged in this order while closely contacting each other in the radial direction. For this reason, although it is a three-phase stator by an insert method in which a plurality of coils of each phase formed by winding windings of each phase in advance are inserted into slots, the windings forming the coils of each phase ( The length of the U-phase winding, etc.) is shortened. Therefore, such a stator can reduce the volume occupied by the transition portion of each phase, is compact, lightweight and inexpensive, has little copper loss, and can be a low-loss and high-power motor.

  In the present specification, the radially outer end of the slot refers to an end on the radially outer side when the slot is viewed in the radial direction around the axis of the stator. In addition, the radial center position of the slot refers to a position just at the center between the radially inner opening end and the aforementioned radially outer end when the slot is viewed in the radial direction centered on the stator axis.

Furthermore, the W-phase surface-side aggregation portion is configured such that the windings are aggregated radially outward from the inner peripheral surface of the stator core and radially inward from the radial center position of the W-phase slot. And good. Similarly, the W-phase rear surface side aggregation portion is configured such that the windings are aggregated radially outside the inner peripheral surface of the stator core and radially inner than the radial center position of the W-phase slot. And good.
Further, the V-phase surface side converging portion consolidates the windings radially outside the W-phase surface side crossing portion and radially inward from the radially outer end of the V-phase slot. Good to be. Further, the V-phase rear surface side consolidating portion is configured to consolidate the windings radially outside the W-phase rear surface side crossing portion and radially inward from the radially outer end of the V-phase slot. And good.
Furthermore, it is preferable that the U-phase surface-side aggregation portion is configured to aggregate the windings on the radially outer side than the V-phase surface-side transition portion. Further, it is preferable that the U-phase slots are aggregated in the first axial direction at the radially outer end. Moreover, it is good for the U-phase back surface side aggregation part to be a form which consolidates the windings in the radial direction outer side than the V-phase back surface side transition part. Further, it is preferable that the U-phase slots are aggregated in the second axial direction at the radially outer end.

  Still another solution is the above-mentioned inner teeth adjacent to each other among the ring-shaped, internal-tooth-shaped U-phase, V-phase, and W-phase three-phase distributed winding stator cores having a front surface and a back surface parallel to the front surface. A plurality of U-phase coils formed by winding a U-phase winding in advance in a U-phase slot, a V-phase slot, and a W-phase slot, and a plurality of V-phase coils formed by winding a V-phase winding in advance. , And a plurality of W-phase coils formed by winding W-phase windings in this order, in this order, respectively, in the axial direction of the stator core, the direction from the back surface to the surface Is the first axial direction, and the opposite is the second axial direction, the U-phase winding forming the U-phase coil has U-phase slot insertion portions respectively inserted into the U-phase slots forming a pair; Of the U-phase slots in the pair, the Interposed between the U-phase surface side crossover portion over the surface of the data core, the U-phase backside crossover portion over the backside, the U-phase slot insertion portion and the U-phase surface side crossover portion, A U-phase surface side converging portion that consolidates windings extending from the U-phase slot insertion portion in the first axial direction of the U-phase slot and connects them to the U-phase surface side crossover portion; and the U-phase slot insertion And the U-phase back side crossing part by concentrating the windings extending from the insertion part in the U-phase slot in the second axis direction of the U-phase slot. A V-phase winding that forms a V-phase coil, and a pair of V-phase slot insertion portions respectively inserted in the V-phase slots forming a pair. V-phase surface side crossing over the surface of the stator core among the V-phase slots , And a V-phase back side crossing portion across the back side, the V-phase slot insertion portion and the V-phase front side crossing portion, and in the first axis direction of the V-phase slot, the V-phase A V-phase surface side converging portion that consolidates windings extending from the insertion portion in the slot and connects to the V-phase surface side crossing portion, and is interposed between the V-phase slot insertion portion and the V-phase back side crossing portion. And in the second axis direction of the V-phase slot, a V-phase back surface side converging portion that consolidates windings extending from the insertion portion in the V-phase slot and connects the V-phase back surface side crossing portion, The W-phase winding forming the W-phase coil is formed on the surface of the stator core between the W-phase slot insertion portion inserted into the paired W-phase slot and the paired W-phase slot. W-phase front side crossing part across the W-side, and W-phase back side crossing part across the back side, The windings interposed between the W-phase slot insertion portion and the W-phase surface side crossing portion, in a first axis direction of the W-phase slot, aggregate the windings extending from the W-phase slot insertion portion. A W-phase surface side converging portion connected to the W-phase surface side crossing portion, and interposed between the W-phase slot insertion portion and the W-phase back surface side crossing portion, in the second axis direction of the W-phase slot, A W-phase back side converging part that consolidates windings extending from the insertion part in the W-phase slot and connects the W-phase back side crossing part, and the U-phase coil, V-phase coil, and W-phase coil are In the first axial direction of the U-phase slot, the W-phase surface side crossing portion is radially outer than the inner peripheral surface of the stator core and more radially than the radial center position of the U-phase slot. Arranged on the inner side, the V-phase surface side crossing portion is on the W-phase surface side Adhering closely to the flange portion via the V-W interphase insulating paper from the outside in the radial direction, radially outward from the W-phase surface side crossover portion, and radially inward from the radially outer end of the U-phase slot The U-phase surface-side aggregated portion is in close contact with the V-phase surface-side transition portion via the U-V interphase insulating paper from the outside in the radial direction and from the surface side, and more than this V-phase surface-side transition portion. Arranged in the radially outer side and the second axial direction, and in the second axial direction of the U-phase slot, the W-phase back side crossing portion is radially outer than the inner peripheral surface of the stator core, and The U-phase slot is disposed radially inward of the center position in the radial direction, and the V-phase back surface side crossing portion is in close contact with the W-phase back surface side crossing portion from the outside in the radial direction via V-W interphase insulating paper. The outer side of the W-phase back side and the outer side of the U-phase slot The U-phase back side aggregated portion is disposed on the radially inner side of the outer end in the direction, and is closely attached to the V-phase back side crossing part via the U-V interphase insulating paper from the radially outer side and the back side. The W-phase surface-side transition portion is disposed on the outer side in the radial direction and in the first axial direction from the V-phase rear surface side transition portion. Is arranged radially outside and radially inward of the center position in the radial direction of the V-phase slot, and the V-phase surface-side aggregated portion is provided with V-W phase insulating paper on the W-phase surface-side transition portion. Via the outer side and the surface side in the radial direction, and arranged in the outer side in the radial direction and the second axial direction from the W-phase surface side crossing portion, and the U-phase surface side crossing portion is the V-phase surface side aggregation portion From the outside in the radial direction through the U-V interphase insulating paper, and the diameter of this V-phase slot In close contact with the radially inner side of the outer end in the direction, and arranged radially outward of the V-phase surface side aggregated portion. In the second axis direction of the V-phase slot, The V-phase back side aggregated portion is disposed on the radially outer side of the inner peripheral surface of the stator core and on the radially inner side of the radial center position of the V-phase slot. The U-phase backside crossing part is arranged in close contact with the part from the outside in the radial direction and from the backside via the V-W interphase insulating paper, and arranged in the radial outside and the first axial direction with respect to the W-phase backside transition part. Is in close contact with the V-phase back side converging portion through the U-V interphase insulating paper from the outside in the radial direction and on the inside in the radial direction with respect to the radially outer end of the V-phase slot. It is arranged on the outer side in the radial direction from the concentrating part, and is above the W-phase slot. In the first axial direction, the W-phase surface-side aggregated portion is disposed radially outward from the inner peripheral surface of the stator core, and the V-phase surface-side transition portion is V− on the W-phase surface-side aggregated portion. The W-phase slot is in close contact with the W-phase insulating paper from the outside in the radial direction and from the surface side, radially outward from the W-phase surface-side aggregated portion and in the first axial direction, and the radial center position of the W-phase slot. From the radially inner side to the radially inner side from the radially outer end of the W-phase slot, and the U-phase surface side transition portion is connected to the V-phase surface side transition portion between the U-V phase insulating papers. The W-phase slot is disposed from the outside in the radial direction through the gap and closely inward in the radial direction from the radially outer end of the W-phase slot, and is arranged radially outside the crossing portion on the V-phase surface side. In the second axis direction, the W-phase back side aggregated portion is The V-phase rear surface side transition portion is disposed radially outward from the inner peripheral surface of the stator core, and the W-phase rear surface-side aggregated portion is connected to the W-phase rear surface-side aggregation portion from the outer side in the radial direction via the V-W interphase insulating paper. The W-phase slot radially outer end is in close contact with the W-phase back side aggregated portion on the radially outer side and the second axial direction and from the radially inner side with respect to the radial center position of the W-phase slot. The U-phase back surface side crossover portion is arranged between the V-phase back surface side crossover portion from the outside in the radial direction via the U-V interphase insulating paper and the diameter of the W-phase slot. It is a stator that is in close contact with the inner side in the radial direction from the outer end in the direction and is arranged on the outer side in the radial direction with respect to the V-phase rear surface side crossing portion.

In the stator of the present invention, when the arrangement of the U-phase coil, the V-phase coil, and the W-phase coil on each slot is viewed, first, in the first axial direction of the U-phase slot, that is, on the surface side of the U-phase slot, W The phase surface side transition portion, the V phase surface side transition portion, and the U phase surface side accumulation portion are arranged in close contact with each other in the radial direction in this order on the radially outer side of the inner peripheral surface of the stator core. Further, in the second axis direction of the U-phase slot, that is, on the back surface side of the U-phase slot, the W-phase back surface side crossing portion, the V-phase back surface side crossing portion, and the U-phase back surface side integration portion are from the inner peripheral surface of the stator core. Are arranged radially in close contact with each other in this order.
Further, in the first axis direction of the V-phase slot, the W-phase surface side transition portion, the V-phase surface side aggregation portion, and the U-phase surface side transition portion are radially outward from the inner peripheral surface of the stator core in this order. They are arranged in close contact with each other in the radial direction. Further, in the second axis direction of the V-phase slot, the W-phase back surface side transition portion, the V-phase back surface side aggregation portion, and the U-phase back surface side transition portion are radially outward from the inner peripheral surface of the stator core in this order. They are arranged in close contact with each other in the radial direction.
Further, in the first axial direction of the W-phase slot, the W-phase surface-side aggregated portion, the V-phase surface-side bridging portion, and the U-phase surface-side bridging portion are radially outward from the inner peripheral surface of the stator core, in this order. They are arranged in close contact with each other in the radial direction. Further, in the second axis direction of the W-phase slot, the W-phase back surface side converging portion, the V-phase back surface side crossing portion, and the U-phase back surface side crossing portion are radially outward from the inner peripheral surface of the stator core in this order. They are arranged in close contact with each other in the radial direction.

  As described above, in the stator of the present invention, the U-phase surface side transition part, the V-phase surface side transition part, the W-phase surface side transition part, the U-phase surface side aggregation part, the V-phase surface side aggregation part, and the W-phase surface side The aggregating part, the U-phase back surface side transition part, the V-phase back surface side transition part, the W-phase back surface side transition part, the U-phase back surface side aggregation part, the V-phase back surface side aggregation part, and the W-phase back surface side aggregation part, The arrangement is such that they are arranged in close contact with each other in a predetermined order. For this reason, although it is a three-phase stator by an insert method in which a plurality of coils of each phase formed by winding windings of each phase in advance are inserted into slots, the windings forming the coils of each phase ( The length of the U-phase winding, etc.) is shortened. Therefore, such a stator can reduce the volume occupied by the transition portion of each phase, is compact, lightweight, inexpensive, has little copper loss, and can be a low-loss and high-power motor.

  Furthermore, in the stator according to claim 1 or 2, the U-phase surface side crossing portion of the U-phase coil is at least in the first axis direction of the V-phase slot and the W-phase slot. The U-phase back side crossing portion is at least in the second axis direction of the V-phase slot and W-phase slot, either from the radially outer ends of the V-phase slot and W-phase slot, or the V-phase slot. It is preferable that the stator be disposed radially inward of the slot and the W-phase slot in the vicinity of the radially outer end of the slot and the W-phase slot.

  In the stator of the present invention, the U-phase surface side crossover portion and the U-phase backside crossover portion of the U-phase coil are also arranged so as to cross the inside or the vicinity thereof from the radially outer ends of the V-phase and W-phase slots. For this reason, the U-phase winding in the U-phase coil can be shortened to reduce copper loss, and the stator can be made lighter and more compact. In addition, of the front and back surfaces of the stator core, the upper surface and the back surface of the radially outer ring-shaped portion where no slot is formed are connected to each other between the phase coils (for example, between the neutral points of each phase coil). In addition, the stator can be made more compact including these spaces, such as connection) and the like, which can be used for the location of the power supply side terminal of each phase coil.

Note that the position radially outside the radial outer end in the vicinity of the radial outer end is specifically the radial outer end of the slot and the outer peripheral surface of the stator core as measured from the radial outer end of the slot. It is preferable that the distance be within the range of 1/3 or less, and further 1/5 or less.
By doing in this way, the area of the part which does not have a U-phase surface side transition part and a U-phase back surface side transition part above among the surface or back surface of a stator iron core can be taken widely. In other words, a 2/3 or more portion or a 4/5 or more portion between the radially outer end of the slot and the outer peripheral surface of the stator core can be used. It can be used easily in places.

  Furthermore, it is a stator of any one of Claims 1-3, Comprising: The said U-phase coil | winding includes the said U-phase surface side aggregation part, and the insertion in the said U-phase slot following this A length of a continuous winding portion of the U-phase winding in the U-phase slot corresponding portion consisting of a portion and the U-phase back side converging portion that follows this portion, according to the arrangement in the U-phase slot When compared with each other, the inside of the U-phase slot disposed at the radially inner end compared to the length of the portion corresponding to the outer U-phase slot disposed at the radially outer end of the U-phase slot. The length of the portion corresponding to the U-phase slot is increased, and the W-phase winding includes the W-phase surface side converging portion, the W-phase slot insertion portion that follows, and the W-phase slot that follows the W-phase slot. W-phase winding in a W-phase slot corresponding part comprising: When the length of the continuous winding portion is compared with each other according to the arrangement in the W-phase slot, the length of the portion corresponding to the outer W-phase slot arranged at the radially outer end of the W-phase slot The length of the portion corresponding to the inner W-phase slot arranged at the radially inner end of the W-phase slot is shortened compared to the V-phase winding. The length of a continuous winding portion of the V-phase winding in the V-phase slot corresponding portion comprising the converging portion, the insertion portion in the V-phase slot following the converging portion, and the V-phase back side converging portion following the consolidating portion. When compared with each other according to the arrangement in the V-phase slot, the V-phase slot is compared with the length of the V-phase slot corresponding to the outer V-phase slot arranged at the radially outer end. Inside V-phase slot corresponding part arranged at the radially inner end of Or the difference between the length of the portion corresponding to the outer U-phase slot and the length of the portion corresponding to the inner U-phase slot in the U-phase winding, and the outer W-phase in the W-phase winding. It is preferable to make the stator longer or shorter with a difference smaller than any of the length of the slot corresponding portion and the length of the inner W-phase slot corresponding portion.

In the stator of the present invention, in the U-phase winding, the length of the inner U-phase slot corresponding portion is made longer than that of the outer U-phase slot corresponding portion. Because of such a relationship, when the U-phase surface aggregation part, the U-phase surface transition part, the U-phase rear surface aggregation part, and the U-phase rear surface transition part are in the above-described form, for example, the U-phase surface transition part and the U-phase rear surface part When the crossing portion is configured to cross the first axial direction or the vicinity of the second axial direction of the radially outer end of the V-phase slot or the W-phase slot, the shape of each of these portions can be easily set to such a shape.
Further, in the W-phase winding, the length of the inner W-phase slot corresponding portion is shorter than that of the outer W-phase slot corresponding portion. Because of this relationship, when the W-phase surface aggregation part, the W-phase surface transition part, the W-phase back surface aggregation part, and the W-phase back surface transition part are in the above-described form, the shape of each of these parts is not unreasonable. It can be done.
Further, in the V-phase winding, the length of the inner V-phase slot corresponding part is equal to or longer or shorter than the outer V-phase slot corresponding part. Because of such a relationship, when the V-phase surface aggregation part, the V-phase surface transition part, the V-phase back surface aggregation part, and the V-phase back surface transition part are in the above-described form, the shape of each of these parts is not unreasonable. It can be done.

  5. The stator according to claim 1, wherein the U-phase winding and the V-phase winding are inserted in the U-phase slot, the V-phase slot, and the W-phase slot, respectively. And, the space factor of the W-phase winding is preferably a stator that is 50% or more for any phase.

In a stator in which the space factor of the windings in the slot is increased, when the transition part of each phase coil is arranged above the slot (for example, in the first axis direction of the slot in the case of the front side transition part) There is a tendency to limit the arrangement of windings of the phases (for example, the V phase with respect to the U phase) and the connection portions thereof. Since the space factor is high, there is no room in the slot, and it is difficult to shift the position of the winding in the slot to the back side (radially outer side) or the opening side (radially inner side). For this reason, there is little margin for adjusting the arrangement of the windings (crossover portions) of the other phases crossing above the slots by shifting the position of the windings in the slots.
On the other hand, in the stator of the present invention, the relationship between the phases is adjusted as described above in the arrangement of the transition portions and the aggregation portions of the phases. For this reason, it can manufacture even in the case of such a high space factor, and it can be set as a compact stator.

In addition, it can also be set as the stator which has a high space factor exceeding 65%.
In this specification, the space factor refers to the ratio of the total sectional area of the inserted windings to the slot effective sectional area. However, the slot effective cross-sectional area refers to the cross-sectional area of the portion into which the winding can be inserted, excluding the area occupied by the slot insulating paper or wedge paper inserted into the slot from the cross-sectional area of the slot. In addition, the cross-sectional area of the winding includes an insulating coating portion.

    Furthermore, it is good to set it as the motor provided with the stator of any one of Claims 1-5, and a rotor.

  According to the motor of the present invention, since the stator is compact and lightweight and has little copper loss, it can be a small and light motor with low loss and high output.

  Still another solution is the above-mentioned inner teeth adjacent to each other among the ring-shaped, internal-tooth-shaped U-phase, V-phase, and W-phase three-phase distributed winding stator cores having a front surface and a back surface parallel to the front surface. A plurality of U-phase coils formed by winding a U-phase winding in advance in a U-phase slot, a V-phase slot, and a W-phase slot, and a plurality of V-phase coils formed by winding a V-phase winding in advance. And a plurality of W-phase coils formed by winding W-phase windings in advance and inserting the U-phase coil, the V-phase coil, and the W-phase coil into the stator core. In the axial direction of the stator iron core, the direction from the back surface to the front surface is the first axial direction, and the opposite is the second axial direction. U of U-phase winding forming U-phase coil Of the U-phase insertion step of inserting the insertion portion in the slot and assembling the U-phase coil, and the U-phase winding forming the U-phase coil, the U-phase surface side coil positioned in the first axial direction from the surface The end portion and the U-phase back side coil end portion located in the second axial direction from the back surface are expanded in diameter, and the U-phase surface side crossing portion that crosses over the surface of the stator core is the V-phase slot and W-phase. The U-phase back side crossing portion that is arranged in the first axial direction of the radially outer end of the slot and crosses the back side of the stator core is the second axis of the radially outer end of the V-phase slot and W-phase slot. A U-phase coil end forming step for forming in a form to be arranged in the direction, and inserting each V-phase slot insertion portion of the V-phase winding forming the V-phase coil into each V-phase slot of the stator core, V to assemble the V-phase coil Of the V-phase winding forming the V-phase coil, the V-phase surface-side coil end portion positioned in the first axial direction from the surface and the V-phase positioned in the second axial direction from the back surface The diameter of the back-side coil end portion is increased, and the V-phase surface side crossover portion that crosses the surface of the stator core and the V-phase backside crossover portion that crosses the back surface are positioned at the radial center positions of the V-phase slot and U-phase slot. A V-phase coil end portion forming step that is formed radially inwardly than the radially outer end, and a W-phase coil that forms the W-phase coil in each W-phase slot of the stator core. A W-phase insertion step of inserting the W-phase slot insertion portion of the phase winding and assembling the W-phase coil, and a position of the W-phase winding forming the W-phase coil in the first axial direction from the surface W-phase surface side coil end portion, and Expanding the diameter of the W-phase back side coil end portion located in the second axis direction from the back side, crossing the W-phase surface side crossing portion over the surface of the stator core and over the back side, the W-phase back side crossing portion, A W-phase coil end forming step for forming the outer core in a form arranged radially outside the inner peripheral surface of the stator iron core and radially inward from the radial center position of the U-phase slot and V-phase slot. In order, the circumference of each turn of the U-phase winding forming the U-phase coil is wound longer as the winding portion of the turn inserted later, and each of the W-phase windings forming the W-phase coil is wound. The circumference of the turn is wound as short as the winding portion of the turn to be inserted later, and the circumference of each turn of the V-phase winding forming the V-phase coil is wound equally, or Than the difference in perimeter of each turn of the U-phase winding, and the above W-phase The winding portion of the turn to be inserted later is wound longer or shorter with a smaller difference than the difference in perimeter of each turn of the wire, and the U-phase insertion step is performed for the U-phase winding with respect to the U-phase winding. The U-phase surface side coil end portion and the U-phase back surface side coil end portion are assembled so as to be symmetrical, and the V-phase insertion step is performed for the V-phase winding with the V-phase surface-side coil end portion. The V-phase back surface side coil end portion is assembled so as to have a symmetrical form, and the W-phase insertion step includes the W-phase front surface side coil end portion and the W-phase back surface side coil end portion with respect to the W-phase winding. Is a method of manufacturing a stator that is assembled in a symmetrical form.

In the stator manufacturing method of the present invention, coils (windings) in which the circumferential length of each phase coil is adjusted to an appropriate length for each phase are used, and the surface side coil end portion of each coil in each insertion step And the back side coil end part is inserted and assembled so as to be symmetrical. For this reason, the coil end part (crossover part, aggregation part) of the same shape can be formed by the surface and back side of an iron core.
As a result, while using the insert method, the length of the coil end portion of each phase can be shortened, and a stator that can be manufactured as an inexpensive, compact, low-loss, high-power motor can be manufactured.

  The stator manufacturing method according to claim 7, wherein the U-phase insertion step includes a U-phase winding inserted in a line between a fixed blade and a moving blade from the back surface side of the stator core. Is pushed up with a stripper and inserted into the U-phase slot, and after the end of the fixed blade held at a predetermined position with respect to the last U-phase winding is passed over, the stripper is moved beyond the front end of the fixed blade. A stator manufacturing method that continues to move in the first axial direction is preferable.

In the insert method, the U-phase winding (U-phase coil) pushed up by the stripper is moved over the tip of the fixed blade, and the inserted U-phase winding is completed in the U-phase slot. However, since the position of the fixed blade with the fixed position is overcome, the shape of the coil end portion on the surface side of the U-phase winding is the U-phase winding inserted earlier and the U-phase winding inserted later. Compared to each other, it is almost the same.
For this reason, even if it uses the U-phase coil wound longer as the winding part of the turn inserted later, if it inserts by such a method, the coil end part on the surface side, and the coil end part on the back side The shape tends to be very different from the shape.

On the other hand, in the stator manufacturing method of the present invention, the stripper is further moved after the last U-phase winding is moved over the tip of the fixed blade. In general, when the U-phase winding is moved over the tip of the fixed blade, there is a tendency that the habit is inclined to the inside. For this reason, when the stripper is moved after the last U-phase winding is moved over the tip of the fixed blade, the U-phase winding (referred to as the last U-phase winding) and the stripper (stripper) that have finally moved over the fixed blade are moved. The last U-phase winding moves as the stripper moves. Then, due to the friction between the U-phase windings, the U-phase windings are moved by being dragged by the stripper. For this reason, in the surface side coil end part, the inner side (the last inserted part) can be made high (long) and the outer side (the first inserted part) can be made low (short).
Thus, by simply controlling the movement of the stripper, the U-phase winding can be easily formed into the same shape on the front side coil end part and the back side coil end part, specifically, the inner side is higher and the outer side is lower. it can.

  Further, in the stator manufacturing method according to claim 7 or 8, the W-phase insertion step is inserted in a line between the fixed blade and the moving blade from the back surface side of the stator core. The W-phase winding is pushed up with a stripper and inserted into the W-phase slot, and at least a part of the W-phase winding is stopped before climbing over the tip of the fixed blade held at a predetermined position. After the wedge paper is inserted into the W-phase slot, a method for manufacturing a stator in which the stripper and the fixed blade are retracted is preferable.

In the insert method, the W-phase winding (W-phase coil) pushed up by the stripper is moved over the tip of the fixed blade, and the wedge paper is inserted to complete the insertion of the W-phase winding over the W-phase slot. To do. However, since the position of the fixed blade with the fixed position is overcome, the shape of the coil end portion on the surface side of the W-phase winding is the W-phase winding inserted earlier and the W-phase winding inserted later. Compared to each other, it is almost the same.
For this reason, even if it uses the W phase coil by which the coil | winding part of the turn inserted later is wound shortly, if it inserts by such a method, it will be the coil end part on the surface side, and the coil end part on the back side The shape tends to be very different from the shape.

In contrast, in the stator manufacturing method of the present invention, the stripper is pushed up in a state where at least a part of the W-phase winding does not get over the tip of the fixed blade. In this way, the W-phase winding that has not yet passed over the fixed blade among the W-phase windings has a smaller amount of protrusion from the stator surface than the W-phase winding that has been inserted and overcome. Further, when comparing the W-phase windings that have not yet passed over the fixed blade, the closer to the stripper, the smaller the amount pushed up by the stripper.
Therefore, if the fixed blade and the stripper are retracted in this state, in the surface side coil end portion, the inner side (the last inserted portion) is low (short) and the outer side (the first inserted portion) is high (long). ) Shape.
By inserting the wedge paper into the slot, the W-phase winding is prevented from jumping out from the opening of the W-phase slot, and all the W-phase windings including the W-phase winding that has not yet passed over the fixed blade. Is inserted and held in the W-phase slot.
Thus, simply by controlling the movement of the stripper, the front-side coil end portion and the back-side coil end portion of the W-phase winding can be easily formed into the same shape, specifically, the inside is low and the outside is high. it can.

  Still another solution is that each phase corresponds to a slot composed of the above-mentioned internal teeth adjacent to each other in a ring-shaped internal gear-shaped stator core having a front surface and a back surface parallel to the front surface. A method of manufacturing a stator, in which a plurality of coils formed by winding windings in advance are inserted in order and assembled to the stator core, and the axial direction of the stator core includes the above-described back surface. When the direction toward the surface is the first axis direction and the opposite is the second axis direction, the first phase is inserted into the first phase slot in which the winding is inserted first among the plurality of phases. A first phase insertion step of inserting a part of the first phase winding forming the coil and assembling the first phase coil, and the circumference of each turn of the first phase winding forming the first phase coil The winding of the turn to be inserted later In the first phase insertion step, the first phase winding is inserted in a line between the fixed blade and the moving blade from the back side of the stator core with respect to the first phase winding. The one-phase winding is pushed up by a stripper and inserted into the first-phase slot, and the tip of the fixed blade is moved over the tip of the fixed blade held at a predetermined position with respect to the last first-phase winding. The stripper is continuously moved in the first axial direction beyond the first axis, and a part of the first phase winding is inserted into the first phase slot to form a first phase slot insertion portion, and the stator The first phase surface side coil end portion positioned in the first axial direction from the surface of the iron core and the first phase back surface side coil end portion positioned in the second axial direction from the back surface are symmetrical. Become Is a manufacturing method of a stator assembled to.

In the insert method, the first-phase winding (first-phase coil) pushed up by the stripper is moved over the tip of the fixed blade, so that the inserted first-phase winding is completed in the first-phase slot. . However, since the position of the fixed end blade is fixed, the shape of the coil end portion on the surface side of the first phase winding is the first phase winding inserted earlier and the first phase inserted later. Compared with the winding, it is almost the same.
For this reason, even if the first phase coil that is wound longer as the winding portion of the turn to be inserted later is used, the coil end portion on the front surface side and the coil end portion on the back surface side are inserted by such a method. The shape of the part tends to be greatly different.

On the other hand, in the stator manufacturing method of the present invention, the stripper is further moved after the last first-phase winding is moved over the tip of the fixed blade, and the first-phase surface side coil end portion and Assemble so that the one-phase back side coil end portion is symmetrical.
In general, when the first phase winding is moved over the tip of the fixed blade, there is a tendency for the first phase winding to be inclined inward. For this reason, when the stripper is moved after the last first-phase winding is moved over the tip of the fixed blade, the first-phase winding (referred to as the last first-phase winding) that has finally moved over the fixed blade Friction occurs with the stripper, and this final first phase winding moves as the stripper moves. Then, due to the friction between the first phase windings, the respective first phase windings are moved so as to be dragged by the movement of the stripper. Thereby, in the surface side coil end part, the inner side (the last inserted part) can be made high (long), and the outer side (the first inserted part) can be made into a low (short) shape.

  Thus, by only controlling the movement of the stripper, for the first phase winding, the front side coil end part and the back side coil end part can be easily formed into the same shape, specifically, the inner side is higher and the outer side is lower. The first phase surface side coil end portion and the first phase back surface side coil end portion can be made symmetrical by holding the tip of the fixed blade at an appropriate predetermined position. Therefore, to manufacture a stator that can be a low-cost, compact, low-loss, high-power motor by shortening the winding length of the coil end portion of the first phase while being a stator formed by the insert method. Can do.

  Still another solution is that each phase corresponds to a slot composed of the above-mentioned internal teeth adjacent to each other in a ring-shaped internal gear-shaped stator core having a front surface and a back surface parallel to the front surface. A method of manufacturing a stator, in which a plurality of coils formed by winding windings in advance are inserted in order and assembled to the stator core, and the axial direction of the stator core includes the above-described back surface. When the direction toward the surface is the first axial direction and the opposite is the second axial direction, the final phase coil is placed in the final phase slot in which the winding is inserted last among the plurality of phases. A final phase insertion step of inserting a part of the final phase winding to be assembled and assembling the final phase coil, and the circumference of each turn of the final phase winding forming the final phase coil is inserted later Turn In the final phase insertion step, the final phase winding is inserted in a line between the fixed blade and the moving blade from the back side of the stator core with respect to the final phase winding. Is pushed up with a stripper and inserted into the final phase slot, and before at least a part of the final phase winding is moved over the tip of the fixed blade held at a predetermined position, the stripper is stopped and the wedge paper is After inserting into the final phase slot, the stripper and the fixed blade are retracted, and a part of the final phase winding is inserted into the final phase slot to form an insertion portion in the final phase slot. A final phase surface side coil end portion located in the first axial direction from the front surface and a final phase back located in the second axial direction from the back surface A first side coil end portion, a manufacturing method of a stator assembly so as to be symmetrical form.

In the insert method, the final phase winding (final phase coil) pushed up by the stripper is moved over the tip of the fixed blade, and the wedge paper is inserted to complete the insertion of the final phase winding over the final phase slot. To do. However, since the tip of the fixed blade with the fixed position is overcome, the shape of the coil end portion on the surface side of the final phase winding is the final phase winding inserted earlier and the final phase winding inserted later. Compared to each other, it is almost the same.
For this reason, even if it uses the last phase coil wound as short as the winding part of the turn inserted later, if it is inserted by such a method, the coil end part on the front side and the coil end part on the back side The shape tends to be very different from the shape.

On the other hand, in the stator manufacturing method of the present invention, the stripper is pushed up in a state where at least a part of the final phase winding does not get over the tip of the fixed blade. In this way, the final phase winding that has not yet passed over the fixed blade among the final phase windings has a smaller amount of protrusion from the stator surface than the final phase winding that has been inserted and overcome. Further, when comparing the final phase windings that have not yet passed over the fixed blade, the closer to the stripper, the smaller the amount pushed up by the stripper.
Therefore, if the fixed blade and the stripper are retracted in this state, in the surface side coil end portion, the inner side (the last inserted portion) is low (short) and the outer side (the first inserted portion) is high (long). ) Shape.
By inserting wedge paper into the slot, the final phase winding is prevented from jumping out from the opening of the final phase slot, and all the final phase windings including the final phase winding that has not yet passed over the fixed blade. Is inserted and held in the final phase slot.

  Thus, the front-side coil end portion and the back-side coil end portion of the final phase winding can be easily formed into the same shape, specifically, the shape with a low inside and a high outside by simply controlling the movement of the stripper. In addition, by holding the tip of the fixed blade at an appropriate predetermined position, the final phase surface side coil end portion and the final phase back surface side coil end portion can be made symmetrical. Therefore, to manufacture a stator that can be a low-cost, compact, low-loss, high-power motor by shortening the winding length of the coil end portion of the first phase while being a stator formed by the insert method. Can do.

  Furthermore, it is good to set it as the manufacturing method of the motor containing the manufacturing method of the stator of any one of Claims 7-11.

  In the motor manufacturing method of the present invention, since the above-described stator manufacturing method is used, an inexpensive, compact, low-loss, high-power motor can be manufactured.

Next, embodiments of the present invention will be described with reference to the drawings.
First, a motor 10 according to the present embodiment will be described with reference to FIG. The motor 10 is a three-phase motor including a rotor 11 and a stator 20. Among these, the rotor 11 is an 8-pole permanent magnet rotor including a cylindrical rotor body 13 centering on the rotation shaft 12 and a magnet 14. The magnets 14 are each inserted and fixed to the rotor body 13 in slits 13S formed in a zigzag manner along the vicinity of the outer peripheral surface, like petals in plan view. On the other hand, the stator 20 is disposed so as to surround the rotor 11.

  This stator 20 is a three-phase eight-pole distributed winding stator. As shown in FIGS. 2 and 3, the stator 20 has a stator core 30 having a ring shape in plan view and having 48 teeth (inner teeth) 31 and slots 32. In addition, eight U-phase coils 51, V-phase coils 61, and W-phase coils 71 are provided. In these coils, a U-phase winding 50, a V-phase winding 60, and a W-phase winding 70 are inserted into predetermined slots 32 for each of the U-phase, V-phase, and W-phase, and wound around the teeth 31 by distributed winding. Formed. Each of the U-phase winding 50, the V-phase winding 60, and the W-phase winding 70 has a U-phase terminal 50T, a V-phase terminal 60T, and a W-phase terminal 70T at one end, and the other end is terminated by a common terminal 79. Yes. Although details will be described later, FIG. 2 shows the U-phase surface side coil end portions 58A, V located outside the surface 30A of the stator core 30 among the U-phase coil 51, the V-phase coil 61, and the W-phase coil 71. The mutual positional relationship when the phase surface side coil end portion 68A and the W phase surface side coil end portion 78A are viewed from the surface 30A side of the stator core is also shown. Specifically, the U-phase surface side coil end portion 58A, the V-phase surface side coil end portion 68A, and the W-phase surface side coil end portion 78A are arranged in this order from the radially outer side to the radially inner side of the stator core 30. Has been. 1 and 2 show the difference in winding method (clockwise and counterclockwise) of the windings 50, 60, 70 of each phase in the U-phase coil 51, the V-phase coil 61, and the W-phase coil 71. “Dot (•)” and “Cross (×)” are shown on the sides of the coils 51 and the like of each phase. Of the coils 51 and the like of each phase, the side indicated by “dot” is close to the terminals 50T, 60T, and 70T of each phase, and the side indicated by “cross” is close to the common terminal 79. As can be understood, the eight coils 51, 61, 71 of each phase are alternately wound in opposite directions, and adjacent coils have opposite polarities.

  As already described, the stator core 30 whose plan view and cross-sectional view are shown in FIGS. 3 (a) and 3 (b) is a ring shape in plan view, and 48 teeth 31 extending radially inward, and these Similarly, there are 48 slots 32 located between the teeth 31. The stator core 30 is formed by stacking steel plates 39 formed by press-punching directional silicon steel plates, for example, and fixing them to each other.

  The stator core 30 is formed with U-phase, V-phase, and W-phase coils 51, 61, 71, each having a U-phase winding 50, a V-phase winding 60, and a W-phase winding 70. . In this embodiment, a plurality of coils 51, 61, 71 in which the windings 50, 60, 70 of each phase are wound in advance are inserted into the stator core 30 and formed. Each of the U-phase winding 50, the V-phase winding 60, and the W-phase winding 70 includes 12 strands 40.

  In this specification, as shown in FIG. 3B, a radial direction passing through the axis 30X of the stator core 30 and perpendicular to the axis 30X is defined as a radial direction RX. Further, the direction along the axis 30X of the stator core 30 (the thickness direction of the core) is defined as the axial direction DX, and the direction from the back surface 30B toward the front surface 30A is defined as the first axial direction DX1, and conversely from the front surface 30A. A direction toward the back surface 30B is defined as a second axial direction DX2.

In order to make the stator and the motor compact, lightweight, low loss, and high output, it is desired to shorten the length of the winding used for the coil 51 and the like. As a result, the weight can be reduced, the copper loss can be reduced, the output can be reduced and the loss can be increased, and the size (volume) of the coil end portion can be reduced.
Therefore, in the stator 20 of the present embodiment, the arrangement of the coil end portions of the coils of the respective phases is set as follows in order to minimize the length of the winding required for the coil end portion. Thus, while forming the coils of each phase by the insert method, the length of the winding 50 used for the coils and the like is cut as much as possible, so that the stator 20 and the motor 10 are compact, lightweight, low loss, and high output.

  First, the form of each part of the stator 20 according to the present embodiment will be described. As already described, the coils 51, 61, 71 of each phase formed on the stator 20 are formed by 3-phase 8-pole distributed winding. Therefore, as shown in FIG. 4, each of the U-phase slot 34u, the V-phase slot 34v, and the W-phase slot 34w in the radial cross section (UU cross section, VV cross section, WW cross section). The forms of the coil 51 and the like will be described with reference to FIGS. 5, 6, and 7, respectively.

  In the following description, the coils 51 and the like of each phase are connected to the slot insertion portion inserted into the slot and to the outside of the slot, specifically, on the surface 30A of the iron core 30 (in the first axial direction than the surface 30A). DX1) and the front surface side coil end portion located on the back surface 30B (second axial direction DX2 relative to the back surface 30B) will be broadly described. Still further, the coil end portion is formed by aggregating the front side crossing portion or the back side crossing portion that crosses the front or back surface of the stator core and the winding extending from the slot insertion portion between the paired slots. May be divided into a front-side aggregated portion or a back-side aggregated portion that is connected to a part or a backside crossover portion. On the other hand, the slot insertion part and the front-side aggregation part and the back-side aggregation part located on both sides thereof may be combined into a slot corresponding part.

That is, the U-phase coil 51 constituted by the U-phase winding 50 includes a U-phase slot insertion portion 53 located in the U-phase slot 34u, a U-phase surface side coil end portion 58A located on the front surface 30A, and a back surface. Description will be broadly made on the U-phase backside coil end portion 58B located on 30B. Furthermore, the U-phase surface side coil end portion 58A may be described by being divided into a U-phase surface-side transition portion 52A and U-phase surface-side aggregation portions 56A located on both sides thereof. Similarly, the U-phase back surface side coil end portion 58B may be described by being divided into a U-phase back surface side crossover portion 52B and U-phase back surface side aggregation portions 56B located on both sides thereof. In addition, one U-phase slot insertion portion 53 and the U-phase front side aggregation portion 56A and the U-phase back side aggregation portion 56B located on both sides thereof may be combined to form a U-phase slot corresponding portion 57.
Further, the V-phase coil 61 composed of the V-phase winding 60 is also composed of a V-phase slot insertion portion 63 positioned in the V-phase slot 34v, a V-phase surface side coil end portion 68A positioned on the front surface 30A, and a back surface. The description will be divided into the V-phase back surface side coil end portion 68B located on 30B. Further, the V-phase surface side coil end portion 68A may be described by being divided into a V-phase surface-side transition portion 62A and V-phase surface-side aggregation portions 66A located on both sides thereof. Similarly, the V-phase back surface side coil end portion 68B may be described by being divided into a V-phase back surface side crossing portion 62B and V-phase back surface side aggregation portions 66B located on both sides thereof. One V-phase slot insertion part 63 and the V-phase surface side aggregation part 66A and the V-phase back side aggregation part 66B located on both sides thereof may be combined to form a V-phase slot corresponding part 67.
Further, the W-phase coil 71 composed of the W-phase winding 70 also includes a W-phase slot insertion portion 73 located in the W-phase slot 34w, a W-phase surface side coil end portion 78A located on the front surface 30A, and a back surface. Description will be broadly made on the W-phase back side coil end portion 78B located on 30B. Further, the W-phase surface side coil end portion 78A may be described by being divided into a W-phase surface side crossover portion 72A and a W-phase surface side aggregation portion 76A located on both sides thereof. Similarly, the W-phase back surface side coil end portion 78B may be described by being divided into a W-phase back surface side crossover portion 72B and W-phase back surface side aggregation portions 76B located on both sides thereof. One W-phase slot insertion portion 63 and the W-phase surface side aggregation portion 76A and the W-phase back side aggregation portion 76B located on both sides thereof may be combined to form a W-phase slot corresponding portion 77.

  First, a cross section (U-U cross section, see FIG. 4) in the U-phase slot 34u will be described with reference to FIG. As shown in this figure, in the U-phase slot 34u, a U-phase winding 50 made up of a large number of strands 40 is provided via a slot insulating paper 80, specifically, the U-phase slot of the U-phase coil 51. The insertion part 53 is inserted. In the U-phase slot 34u, the strands 40 are packed from the back side (the radially outer side of the U-phase slot 34u, the left side in the drawing) in accordance with the order when they are inserted by a method described later. When viewed in a cross section orthogonal to 30X, they are arranged as shown in FIG. As shown in FIG. 8, in order to prevent a problem that the wire 40 (U-phase winding 50 or the like) inserted into the slot 34u or the like jumps out from the inner opening 34ui or the like of the slot, A wedge paper 83 having a substantially U-shaped cross section is inserted.

  In the first axial direction DX1 (upper side in the figure) than the U-phase slot insertion portion 53 located in the U-phase slot 34u, a U-phase winding 50 (element wire 40) extending from the U-phase slot insertion portion 53 is provided. On the surface 30A, a U-phase surface-side aggregation portion 56A for connection to the U-phase surface-side transition portion 52A disposed near the radially outer ends of the V-phase slot 34v and the W-phase slot 34w is located. For this reason, the U-phase surface-side converging portion 56A has the radial dimension of the U-phase winding 50 (elementary wire 40) housed in the U-phase slot 34u so as to extend in the radial dimension of the U-phase slot 34u. To about 1/2 to 1/3. Specifically, in the first axial direction DX1 (upper side in the figure) than the cuff 80A of the slot insulating paper 80, the U-phase windings 50 (wires 40) are gathered and gathered radially outward. Further, a V-phase surface side crossing portion 62A is disposed inside the U-phase surface side converging portion 56A via a U-V interphase insulating paper 81, and further inside, a V-W interphase insulating paper 82 is provided. A W-phase surface side crossover portion 72A is arranged through the.

  More specifically, in the first axial direction DX1 of the U-phase slot 34u, the W-phase surface side crossing portion 72A is radially outward from the inner peripheral surface 30C of the stator core (left side in the figure), and FIG. In FIG. 5, the U-phase slot 34u indicated by the alternate long and short dash line is arranged on the radially inner side (right side in the figure) of the radial center position 34um. Further, the V-phase surface side crossover portion 62A is in close contact with the W-phase surface side crossover portion 72A from the outside in the radial direction via the V-W interphase insulating paper 82, and is radially outside the W-phase surface side crossover portion 72A. In addition, the U-phase slot 34u is disposed on the radially inner side (right side in the figure) with respect to the radially outer end 34us. Furthermore, the U-phase surface-side converging portion 56A is in close contact with the V-phase surface-side connecting portion 62A from the radially outer side (left side in the figure) and the surface side (lower side in the figure) via the U-V interphase insulating paper 81. These are arranged on the outer side in the radial direction (right side in the figure) and the second axial direction DX2 (lower side in the figure) than the V-phase surface side crossover part 52A.

  The same applies to the second axial direction DX2 as compared to the U-phase slot 34u. That is, in the second axial direction DX2 (lower side in the figure) with respect to the U-phase slot insertion portion 53 located in the U-phase slot 34u, a U-phase winding 50 (element wire 40) extending from the U-phase slot insertion portion 53 is provided. ) On the back surface 30B is located on the back surface 30B to the U-phase back surface side crossover portion 52B disposed near the radially outer ends of the V-phase slot 34v and the W-phase slot 34w. For this reason, this U-phase back side consolidating part 56B consolidates the radial dimension in the U-phase slot 34u to about 1/2 to 1/3 thereof. Specifically, in the second axial direction DX2 (lower side in the figure) of the cuff 80B of the slot insulating paper 80, the U-phase windings 50 (element wires 40) are gathered and gathered radially outward. Furthermore, a V-phase backside crossing portion 62B is disposed inside the U-phase backside aggregation portion 56B via a U-V interphase insulating paper 81, and further, inside the V-phase interphase insulating paper 82. The W-phase back side crossover portion 72B is disposed through the.

  More specifically, in the second axial direction DX2 of the U-phase slot 34u, the W-phase rear surface side crossing portion 72B is radially outward from the inner peripheral surface 30C of the stator core (left side in the figure), and the U-phase The slot 34u is disposed on the radially inner side (right side in the drawing) of the radial center position 34um. Further, the V-phase back surface side crossover portion 62B is in close contact with the W-phase back surface side crossover portion 72B from the outside in the radial direction via the V-W interphase insulating paper 82, and is outside in the radial direction from the W-phase back surface side crossover portion 72B. In addition, the U-phase slot 34u is disposed on the radially inner side (right side in the figure) with respect to the radially outer end 34us. Furthermore, the U-phase back side aggregated portion 56B is in close contact with the V-phase back side crossing portion 62B from the radially outer side (left side in the figure) and the front side (upper side in the figure) via the U-V interphase insulating paper 81. It is arranged on the radially outer side (left side in the figure) and the first axial direction DX1 (upper side in the figure) with respect to the V-phase back side crossover part 52A.

  Moreover, as can be easily understood with reference to FIG. 5, in both the first axial direction DX1 and the second axial direction DX2 of the U-phase slot 34u, the U-phase surface side aggregation portion 56A and the U-phase rear surface side aggregation 56B, The V-phase surface side crossover 62A and the V-phase backside crossover 62B, the W-phase frontside crossover 72A and the W-phase backside crossover 72B are formed in a symmetrical shape.

  Next, a cross section (VV cross section, see FIG. 4) in the V-phase slot 34v will be described with reference to FIG. As shown in this figure, in the V-phase slot 34v, a V-phase winding 60 made up of a large number of strands 40 is provided via a slot insulating paper 80. Specifically, a V-phase slot of the V-phase coil 61 is provided. The insertion part 63 is inserted. Even in the V-phase slot 34v, the strands 40 are packed from the back side (left side in the figure) according to the order in which they are roughly inserted, and as viewed in a cross section orthogonal to the axis 30X, as shown in FIG. Is arranged.

  In the first axial direction DX1 (upper side in the figure) than the V-phase slot insertion portion 63 located in the V-phase slot 34v, a V-phase winding 60 (element wire 40) extending from the V-phase slot insertion portion 63 is provided. On the surface 30A, a V-phase surface-side converging portion 66A for connection to the V-phase surface-side connecting portion 62A arranged on the radially outer side of the W-phase slot 34w and the U-phase slot 34u is located. For this reason, the V-phase surface side converging portion 66A has the radial dimension of the V-phase winding 60 (elementary wire 40) accommodated in the V-phase slot 34v so as to extend in the radial dimension of the V-phase slot 34v. To about 1/2 to 1/3. Specifically, in the first axial direction DX1 (upper side in the figure) than the cuff 80A of the slot insulating paper 80, the V-phase winding 60 (elementary wire 40) is gathered and the V-phase slot 34v is radially outward. Are gathering. Further, on the radially outer side of the V-phase surface-side converging portion 66A, a U-phase surface-side bridging portion 52A is disposed via a U-V interphase insulating paper 81, while on the radially inner side, the V- A W-phase surface side crossover portion 72A is arranged via the W-phase insulating paper 82.

  More specifically, in the first axial direction DX1 of the V-phase slot 34v, the W-phase surface side crossing portion 72A is radially outward from the inner peripheral surface 30C of the stator core 30 (left side in the figure), and In FIG. 6, the V-phase slot 34v indicated by a one-dot chain line is disposed radially inward (right side in the figure) with respect to the radial center position. Further, the V-phase surface-side converging portion 66A is in close contact with the W-phase surface-side connecting portion 72A via the V-W interphase insulating paper 82 from the radially outer side (left side in the figure) and the surface side (lower side in the figure). These are disposed on the outer side in the radial direction (left side in the figure) and on the second axial direction DX2 (lower side in the figure) than the W-phase surface side crossover part 72A. Further, the U-phase surface side crossover portion 52A has a diameter larger than the radial outer end 34vs of the V-phase slot 34v from the radially outer side via the U-V interphase insulating paper 81 to the V-phase surface side converging portion 66A. It is in close contact with the inner side in the direction (right side in the figure), and is arranged on the outer side in the radial direction (left side in the figure) with respect to the V-phase surface side aggregation portion 66A.

  The same applies to the second axial direction DX2 rather than the V-phase slot 34v. That is, in the second axial direction DX2 (lower side in the figure) from the V-phase slot insertion portion 63 located in the V-phase slot 34v, the V-phase winding 60 (element wire 40) extending from the V-phase slot insertion portion 63 is disposed. ) On the rear surface 30B is positioned on the rear surface 30B to the V-phase rear surface side crossing portion 62B disposed on the outer side in the radial direction of the W-phase slot 34w and the U-phase slot 34u. For this reason, this V-phase back surface side consolidating part 66B consolidates the V-phase winding 60 (element wire 40) to about 1/2 to 1/3 of the radial dimension in the V-phase slot 34v. Specifically, in the second axial direction DX2 (lower side in the figure) of the cuff 80B of the slot insulating paper 80, the V-phase winding 60 (elementary wire 40) is gathered and the W-phase slot 34w is radially outside. Gathering close. Further, on the radially outer side of the V-phase rear surface side converging portion 66B, a U-phase rear surface side crossing portion 52B is disposed via the U-V interphase insulating paper 81, while on the radially inner side, the V- A W-phase back side crossover portion 72 </ b> B is disposed via the W-phase insulating paper 82.

  More specifically, in the second axial direction DX2 (lower side in the figure) of the V-phase slot 34v, the W-phase rear surface side crossing portion 72B is radially outward from the inner peripheral surface 30C of the stator core 30 (left side in the figure). ) And the radial inner side (right side in the figure) of the V-phase slot 34v from the radial center position 34vs. Further, the V-phase back surface side converging portion 66B is in close contact with the W-phase back surface side crossover portion 72B via the V-W interphase insulating paper 82 from the radially outer side (left side in the drawing) and the back surface side (upper side in the drawing). It is arranged on the radially outer side (left side in the figure) and the first axial direction DX1 (upper side in the figure) with respect to the W-phase back side crossover part 72B. Further, the U-phase rear surface side crossover portion 52B is arranged on the V-phase rear surface side converging portion 66B from the radially outer side (left side in the drawing) via the U-V interphase insulating paper 81 and on the radially outer side of the V-phase slot 34v. It is in close contact on the radially inner side (right side in the figure) with respect to the end 34vs, and is arranged on the radially outer side (left side in the figure) with respect to the V-phase back surface side aggregation portion 66B.

  Moreover, as can be easily understood with reference to FIG. 6, the U-phase surface side crossover portion 52A and the U-phase backside crossover portion 52B in both the first axial direction DX1 and the second axial direction DX2 of the V-phase slot 34v. The V-phase surface side aggregation portion 66A and the V-phase back surface side aggregation portion 66B, and the W-phase surface side crossover portion 72A and the W-phase back surface side crossover portion 72B are formed in a symmetrical shape.

  Next, a cross section (W-W cross section, see FIG. 4) in the W-phase slot 34w will be described with reference to FIG. As shown in this figure, in the W-phase slot 34w, a W-phase winding 60 made up of a large number of strands 40 is provided via a slot insulating paper 80. Specifically, a W-phase slot of a W-phase coil 71 is provided. The insertion part 73 is inserted. Even in the W-phase slot 34w, the strands 40 are packed from the back side (left side in the figure) according to the order in which they are roughly inserted, and when viewed in a cross section perpendicular to the axis 30X, as shown in FIG. Is arranged.

  In the first axial direction DX1 (upper side in the drawing) than the W-phase slot insertion portion 73 located in the W-phase slot 34w, a W-phase winding 70 (element wire 40) extending from the W-phase slot insertion portion 73 is provided. On the surface 30A, a W-phase surface-side converging portion 76A for connection to the W-phase surface-side connecting portion 72A disposed on the radially inner side of the U-phase slot 34u and the V-phase slot 34v is located. For this reason, the W-phase surface side consolidating portion 76A has the radial dimension of the W-phase winding 70 (elementary wire 40) accommodated in the W-phase slot 34w so as to extend in the radial dimension of the W-phase slot 34w. To about 1/2 to 1/3. Specifically, in the first axial direction DX1 (upper side in the figure) than the cuff 80A of the slot insulating paper 80, the W-phase winding 70 (elementary wire 40) is gathered, and the W-phase slot 34w is closer to the inner side in the radial direction. Are gathering. Further, a V-phase surface side crossing portion 62A is disposed on the outer side in the radial direction of the W-phase surface side converging portion 76A via a V-W interphase insulating paper 82, and further on the outer side in the radial direction, the U-V A U-phase surface side crossover portion 52 </ b> A is disposed via the interphase insulating paper 81.

  More specifically, in the first axial direction DX1 of the W-phase slot 34w, the W-phase surface side aggregation portion 76A is disposed on the radially outer side (the left side in the drawing) from the inner peripheral surface 30C of the stator core 30. . Further, the V-phase surface side crossover portion 62A is in close contact with the W-phase surface-side aggregation portion 76A from the radially outer side (left side in the figure) and from the surface 30A side (lower side in the figure) via the V-W interphase insulating paper 82. Then, the diameter of the W-phase slot 34w indicated by the alternate long and short dash line in FIG. 7 on the radially outer side (left side in the figure) and the first axial direction DX1 (upper side in the figure) from the W-phase surface side converging portion 76A. It is arranged between the radial direction inner side (right side in the figure) from the radial inner side (right side in the figure) from the radial center position 34wm and the radial outer side end 34ws of the W-phase slot 34w. Further, the U-phase surface side crossover portion 52A is arranged on the V-phase surface side crossover portion 62A from the radially outer side (left side in the figure) via the U-V interphase insulating paper 81 and on the radially outer side of the W-phase slot 34w. It is in close contact on the radially inner side (right side in the figure) with respect to the end 34ws, and is disposed on the radially outer side (left side in the figure) with respect to the V-phase surface side crossover portion 62A.

  The same applies to the second axial direction DX2 rather than the W-phase slot 34w. That is, in the second axial direction DX2 (lower side in the drawing) from the W-phase slot insertion portion 73, the W-phase winding 70 (element wire 40) extending from the W-phase slot insertion portion 73 is placed on the back surface 30B. A W-phase back surface side consolidating portion 76B for connection to the W-phase back surface side crossing portion 72B disposed on the radially inner side of the U-phase slot 34u and the V-phase slot 34v is located. For this reason, this W-phase back surface side consolidating portion 76B collects the W-phase winding 70 (elementary wire 40) to about 1/2 to 1/3 of the radial dimension in the W-phase slot 34w. Specifically, in the second axial direction DX2 (lower side in the figure) than the cuff 80B of the slot insulating paper 80, the W-phase winding 70 (elementary wire 40) is gathered and the W-phase slot 34w is radially inward. Gathering close. Further, a V-phase rear surface side crossing portion 62B is disposed on the outer side in the radial direction of the W-phase rear surface side consolidating portion 76B via the V-W interphase insulating paper 82, and further on the outer side in the radial direction, the U-V A U-phase back side crossover portion 52B is arranged with the interphase insulating paper 81 interposed therebetween.

  More specifically, in the second axial direction DX2 (lower side in the figure) of the W-phase slot 34w, the W-phase rear surface side aggregation portion 76B is radially outer than the inner peripheral surface 30C of the stator core 30 (left side in the figure). ). Further, the V-phase back surface side crossing portion 62A is in close contact with the W-phase back surface side consolidating portion 76B from the radially outer side (left side in the drawing) and the back surface 30B side (upper side in the drawing) via the V-W interphase insulating paper 82. Thus, it is radially outward (left side in the figure) and the second axial direction (lower side in the figure) from the W-phase back side converging portion 76B, and more radially than the radial center position 34wm of the W-phase slot 34w. Arranged from the inner side (right side in the figure) to the radially inner side (right side in the figure) from the radially outer end 34ws of the W-phase slot 34w. Further, the U-phase rear surface side crossover portion 52B is arranged on the V-phase rear surface side crossover portion 62B from the radially outer side (left side in the figure) via the U-V interphase insulating paper 81 and on the radially outer side of the W-phase slot 34w. It is in close contact on the radially inner side (right side in the figure) with respect to the end 34ws, and is arranged on the radially outer side (left side in the figure) with respect to the V-phase back surface side crossover portion 62B.

  Moreover, as can be easily understood with reference to FIG. 7, the U-phase surface side crossover portion 52A and the U-phase backside crossover portion 52B in both the first axial direction DX1 and the second axial direction DX2 of the W-phase slot 34w. The V-phase surface side transition 62A and the V-phase back surface side transition part 62B, the W-phase surface side aggregation part 76A and the W-phase back surface side aggregation part 76B are formed in a symmetrical shape.

  Further, when attention is paid to the surface side transition portion 52A among the coils 51 and the like of each phase, as can be understood from FIGS. 4 to 7 and FIG. 2, the W phase coil 71 of the W core coil 71 is formed on the surface 30 of the stator core 30. The W-phase surface side crossover portion 72A is radially outer than the inner peripheral surface 30C of the stator core 30 and more radially than the center positions 34um and 34vm in the radial direction of the U-phase slot 34u and the V-phase slot 34v. Arranged inside. Further, the V-phase surface side crossover portion 62A of the V-phase coil 61 has a diameter through the V-W interphase insulating paper 82 to the W-phase surface side crossover portion 72A in the first axial direction DX1 of the U-phase slot 34u. It is in close contact with the outer side in the direction, and is disposed on the outer side in the radial direction with respect to the W-phase surface side crossing portion 72A and on the inner side in the radial direction with respect to the radially outer ends 34ws and 34us of the W-phase slot 34w and U-phase slot 34u . Further, the U-phase surface side crossover portion 52A of the U-phase coil 51 has a diameter through the U-V interphase insulating paper 81 to the V-phase surface side crossover portion 62A in the first axial direction DX1 of the W-phase slot 34w. It is in close contact with the outer side in the direction, and is disposed radially outward from the V-phase surface side crossing portion 62A and in the first axial direction DX1 of the radially outer ends 34vs, 34ws of the V-phase slot 34v and the W-phase slot 34w. Yes.

  Similarly, when attention is paid to the back-side connecting portion 52B among the coils 51 and the like of each phase (see FIGS. 4 to 7 and 2), the W-phase back surface of the W-phase coil 34w on the back surface 30B of the stator core 30. The side crossover portions 72B are arranged radially outside the inner peripheral surface 30C of the stator core 30 and radially inside the U-phase slot 34u and the V-phase slot 34v in the radial direction center 34um, 34vm. Has been. In addition, the V-phase back surface side transition portion 62B of the V-phase coil 61 has a diameter of the W-phase back surface side transition portion 72B via the V-W interphase insulating paper 82 in the second axial direction DX2 of the U-phase slot 34u. It is in close contact with the outer side in the direction, and is disposed on the outer side in the radial direction with respect to the W-phase back side crossover portion 72B and on the inner side in the radial direction with respect to the radially outer ends 34ws and 34us of the W-phase slot 34w and U-phase slot 34u. Further, the U-phase back side crossover portion 52B of the U-phase coil 51 has a diameter across the V-phase backside crossover portion 62B via the U-V interphase insulating paper 81 in the second axial direction DX2 of the W-phase slot 34w. It is in close contact with the outer side in the direction, and is disposed on the outer side in the radial direction with respect to the V-phase rear surface side crossing portion 62B, and in the second axial direction DX2 of the radially outer ends 34vs, 34ws of the V-phase slot 34v and the W-phase slot 34w. Yes.

  Moreover, regarding the U-phase coil, the U-phase surface side crossover portion 52A is at least in the first axial direction DX1 (upper side in FIGS. 6 and 7) of the V-phase slot 34v and the W-phase slot 34w. In the vicinity of the radially outer ends 34 vs, 34 ws, it is disposed radially inward from the position radially outside the radially outer ends 34 vs, 34 ws. Further, the U-phase rear surface side crossover portion 52B has at least the radial outer ends 34vs, the second axial direction DX2 (lower side in FIGS. 6 and 7) of the V-phase slot 34v and the W-phase slot 34w. In the vicinity of 34 ws, it is arranged on the radially inner side from the position on the radially outer side from the radially outer ends 34 vs, 34 ws. In the present embodiment, specifically, the distance between the radially outer ends 34 vs and 34 ws and the outer peripheral surface of the iron core 30 is arranged on the radially inner side of the position within 1/3 thereof.

  Further, individual forms and lengths of the windings 50 and the like constituting each phase coil 51 and the like will be described below. First, regarding the U-phase winding 50, a U-phase slot comprising a U-phase surface side converging portion 56A, a U-phase slot insertion portion 53 that follows, and a U-phase back side consolidating portion 56B that follows this. A configuration of a continuous winding portion of the U-phase winding 50 in the corresponding portion 57 will be described (see FIG. 5).

  First, in the U-phase winding 50, attention is paid to the outer U-phase slot corresponding portion 57s disposed in the radially outer end 34usp in the vicinity of the radially outer end 34us in the U-phase slot 34u and indicated by a broken line in FIG. To do. The outer U-phase slot corresponding portion 57s is disposed at the radially outer end 34usp in the U-phase slot 34u, and at the U-phase surface side converging portion 56A in the first axial direction DX1 from the cuff 80A in the radial direction. It has a form bent outward (left side in the figure). Similarly, the U-phase rear surface side consolidating portion 56B has a configuration bent outward in the radial direction (left side in the figure) in the second axial direction DX2 from the cuff 80B.

  Further, attention is paid to an inner U-phase slot corresponding portion 57i that is disposed at the radially inner end 34uip in the vicinity of the inner opening 34ui in the U-phase slot 34u and indicated by a broken line in FIG. The inner U-phase slot corresponding portion 57i is disposed at the radially inner end 34uip in the U-phase slot 34u, and at the U-phase surface side converging portion 56A in the first axial direction DX1 from the cuff 80A in the radial direction. It has a form that extends in a substantially parabolic shape in the first axial direction DX1 (upper side in the figure) while bending outward (left side in the figure). Similarly, in the U-phase rear surface side consolidating portion 56B, it is bent in the second axial direction DX2 (left side in the figure) in the second axial direction DX2 from the cuff 80B so as to be substantially parabolic in the second axial direction DX2 (lower side in the figure). It has an extended form.

  When the lengths of the outer U-phase slot corresponding portion 57s and the inner U-phase slot corresponding portion 57i are compared, the inner U-phase slot corresponding portion 57i is made longer as can be easily understood from FIG.

  Next, for the W-phase winding 70, the W-phase is composed of a W-phase surface side consolidating portion 76 </ b> A, a W-phase slot insertion portion 73 that follows, and a W-phase back side consolidating portion 76 </ b> B that follows this. A configuration of a continuous winding portion of the W-phase winding 70 in the slot corresponding portion 77 will be described (see FIG. 7).

  First, in the W-phase winding 70, the W-phase slot 34w is arranged at the radially outer end 34wsp in the vicinity of the radially outer end 34ws, and attention is paid to the outer W-phase slot corresponding portion 77s indicated by a broken line in FIG. To do. The outer W-phase slot corresponding portion 77s is arranged at the radially outer end 34wsp in the W-phase slot 34w, and in the W-phase surface side converging portion 76A in the first axial direction DX1 from the cuff 80A in the radial direction. It has a form extending in the first axial direction DX1 (upper side in the figure) while bending inward (right side in the figure). Similarly, the W-phase rear surface side consolidating portion 76B has a configuration extending in the second axial direction DX2 (lower side in the figure) while being bent radially inward (right side in the figure) in the second axial direction DX2 from the cuff 80B. .

  Further, attention is focused on an inner W-phase slot corresponding portion 77i that is disposed in the radially inner end 34wip in the vicinity of the inner opening 34wi in the W-phase slot 34w and indicated by a broken line in FIG. The inner W-phase slot corresponding portion 77i is disposed at the radially inner end 34wip in the W-phase slot 34w, and is substantially straight in the first axial direction DX1 (upper side in the drawing) in the W-phase surface side converging portion 76A. It has a form extending in a shape. Similarly, the W-phase rear surface side consolidating portion 76B also has a form extending substantially linearly in the second axial direction DX2 (lower side in the figure).

  When the lengths of the outer W-phase slot corresponding portion 77s and the inner W-phase slot corresponding portion 77i are compared, as can be easily understood from FIG. 7, in contrast to the U-phase case, the inner W-phase slot corresponding portion 77i is shorter.

  The remaining V-phase winding 60 also includes a V-phase slot comprising a V-phase surface side converging portion 66A, a V-phase slot insertion portion 63 following this, and a V-phase back side converging portion 66B following this. A configuration of a continuous winding portion of the V-phase winding 60 in the corresponding portion 67 will be described (see FIG. 6).

  First, in the V-phase winding 60, the outer V-phase slot corresponding portion 67s, which is arranged at the radially outer end 34vsp in the vicinity of the radially outer end 34vs in the V-phase slot 34v and indicated by a broken line in FIG. 6, is selected. To do. The outer V-phase slot corresponding portion 67s is disposed at the radially outer end 34vsp in the V-phase slot 34v, and at the V-phase surface side converging portion 66A in the first axial direction DX1 from the cuff 80A in the radial direction. It has a form extending in the first axial direction DX1 (upper side in the figure) while being slightly bent inward (right side in the figure). Similarly, the V-phase back side converging portion 66B extends from the cuff 80B to the second axial direction DX2 (lower side in the figure) while being slightly bent radially inward (right side in the figure) in the second axial direction DX2. Have.

  Further, an inner V-phase slot corresponding portion 67i that is arranged at the radially inner end 34vip in the vicinity of the inner opening 34vi in the V-phase slot 34v and indicated by a broken line in FIG. 6 is selected. The inner V-phase slot corresponding portion 67i is disposed at the radially inner end 34vip in the V-phase slot 34v, and at the V-phase surface side converging portion 66A in the first axial direction DX1 from the cuff 80A in the radial direction. It has a form extending in the first axial direction DX1 (upper side in the figure) while being slightly bent outward (left side in the figure). Similarly, the V-phase back side consolidating portion 66B extends from the cuff 80B to the second axial direction DX2 (lower side in the drawing) while being slightly bent radially outward (right side in the drawing) in the second axial direction DX2. Have.

When the lengths of the outer V-phase slot corresponding portion 67s and the inner V-phase slot corresponding portion 67i are compared, as can be easily understood from FIG. 6, they are substantially equal.
Specifically, in this embodiment, the inner V-phase slot corresponding portion 67i is slightly longer than the outer V-phase slot corresponding portion 67s. However, the difference in length between the two is small. Specifically, the difference between the lengths of the outer U-phase slot corresponding portion 57s and the inner U-phase slot corresponding portion 57i in the U-phase winding 50 (see FIG. 5), and The difference is smaller than any of the differences between the lengths of the outer W-phase slot corresponding portion 77s and the inner W-phase slot corresponding portion 77i of the W-phase winding 70 (see FIG. 7).
Note that, depending on the form of the V-phase front surface side aggregation portion 66A and the V-phase back surface side aggregation portion 66B, the inner V-phase slot corresponding portion 67i may be slightly shorter than the outer V-phase slot corresponding portion 67s. However, it is the same that this difference is smaller than the difference between the U phase and the W phase as described above.

  As will be described later, the stator 20 according to the present embodiment is formed by winding a winding in advance to form a coil, and insert-molding the coil into the stator core 30. When the coil is formed by the insert method in this way, conventionally, in consideration of the ease of the insertion work and the subsequent work of inserting the coil of the other phase, etc. Usually it was made sufficiently longer than the required dimensions. However, if this is done, the insertion work and the like are facilitated, but after the coil is inserted into the iron core, the winding (elementary wire) remains at the coil end portion. For this reason, the transition part of the U-phase coil is arranged radially outside of the V-phase and W-phase slots 34v and 34w from the radially outer ends 34vs and 34ws, and the transition part of each phase coil is vertically and horizontally. The arrangement relationship between the coil end portions of each phase, such as being arranged so as to swell, is not the above-described relationship, and is different for each stator, and the mutual relationship is also a constant relationship at each place. There wasn't. In such a stator, the length of each phase winding includes an unnecessary part, contrary to the demand for compactness and weight reduction, the copper loss increased, and the output was relatively low. .

  On the other hand, in the stator 20 of the present embodiment, the U-phase coil 51, the V-phase coil 61, and the W-phase coil 71 have the arrangement and configuration as described above, and are mutually connected at various points such as the cross section of each slot. It has a predetermined arrangement. This arrangement is possible because each phase coil, particularly the coil end portion 58A, is kept to a minimum length necessary to form the three-phase coil 51, etc. As a result, the stator 20 and the motor 10 using the stator 20 can be reduced in size and weight, and can have low loss and high output.

Further, in the stator 20 of the present embodiment, the space factor of the winding 50 or the like (element wire 40) inserted and arranged in each slot 34u or the like is set to a high value of 50% or more, specifically about 70%. Yes. In the stator 20 having such a high space factor, the transition portions 52A and the like of the respective phase coils 51 and the like are placed above the slots of the other phases (for example, the V-phase and W-phase slots for the U-phase surface side transition portion 52A). When arranged in the first axial direction DX1 of 34v, 34w, windings of other phases (for example, V phase and W phase with respect to U phase) and their transition parts (V phase, W phase windings 60, 70 and V phase surface side) There is a tendency to limit the arrangement of the transition part 62A, the W-phase surface side transition part 72A, and the like. Since the space factor is high, there is no room in the interior of each slot 34u, etc., and the position of the winding 50 etc. in the slot can be shifted to the back side (radially outer side) or the opening side (radially inner side). difficult. Therefore, by shifting the position of the winding 50 or the like in the slot 34, there is a margin for adjusting the arrangement of the windings (crossing portions) of other phases over the slot 34 (for example, the first axial direction DX1). Because there are few. On the other hand, in the stator 20 of the present embodiment, the arrangement of the transition portions 52A and the like of each phase coil 51 and the like, the aggregation portion 56A and the like are adjusted as described above to adjust the relationship between the phases. For this reason, it can be manufactured even in the case of a high space factor of 50% or more, and the stator 20 having a compact and low loss can be obtained.
In particular, when the space factor is set to a high space factor of 65% or more (70% in this example) as in the stator 20 of the present embodiment, the transition portion of each phase coil 51 and the like as described above. By adjusting the arrangement relationship of 52A and the like and the aggregation portion 56A and the like, the stator 20 can be made compact and low loss.

Next, a method for manufacturing the stator 20 according to this embodiment will be described with reference to FIGS. In the method for manufacturing the stator 20 of the present embodiment, first, the U-phase coil 51 is inserted into the stator core 30, then the V-phase coil 61 is inserted, and further the W-phase coil 71 is inserted.
First, the process of inserting the U-phase coil 51 will be described. First, as shown in FIG. 9, the U-phase coil 51 is formed by winding the U-phase winding 50 around the winding frame 111 using a winding device 110 and forming it into a substantially oval shape using a flyer (not shown). The reel 111 has a fixed reel 111F whose position is fixed, and a movable reel 111M that can move in parallel as indicated by a two-dot chain line in the drawing. Furthermore, the moving-side reel 111M has a six-step shape that becomes wider toward the bottom in the drawing. Therefore, as shown in the drawing, the U-phase winding 50 is wound between the fixed-side winding frame 111F and the moving-side winding frame 111M so as to be wound one turn at each stage of the moving-side winding frame 111M. Thereafter, the moving-side reel 111M is moved so as to approach the fixed-side reel 111F (right side in the figure), and the wound U-phase winding 50 is dropped downward as indicated by the arrow, whereby the U-phase winding A U-phase coil 51 in which 50 is formed is obtained.
As described above, the U-phase winding 50 includes 12 strands 40.

  Here, since this U-phase coil 51 is formed by winding the U-phase winding 50 using the winding device described above, of the U-phase winding 50 (element wire 40) forming the U-phase coil 51, The circumference of the winding portion located on the lower side in the drawing is longer. As will be described later, since this U-phase coil 51 is inserted and mounted in the U-phase slot 34u of the iron core 30, the circumferential length of each turn of the U-phase winding 50 forming the U-phase coil 51 is inserted later. The winding portion of the turn has a longer winding shape. Further, as indicated by a broken line in the figure, the lowermost winding portion includes the aforementioned inner U-phase slot corresponding portion 57i, and the uppermost winding portion corresponds to the outer U-phase slot. The portion 57s is included.

  As shown in FIG. 10, the molded U-phase coil 51 is set on the inserter 120 so as to be hung on the fixed blade 121 from above the fixed blade 121. The inserter 120 has a known configuration. Specifically, the U-phase coil 51 held in a state where one strand 40 is arranged between the moving blade 122 and the fixed blade 121 is projected from the stripper main body portion 125H of the stripper 125 in the radial direction. The push-up blade portion 125P inserted between the moving blade 122 and the fixed blade 121 can be pushed upward in the figure (see FIG. 12).

  After the U-phase coil 51 is set in the inserter 120, the stator core 30 is further set at a predetermined position as shown in FIG. The slot insulating paper 80 is already inserted into each slot 34 of the stator core 30 with the cuffs 80A and 80B protruding from the front surface 30A and the back surface 30B. Specifically, the inner peripheral surface 30C of the iron core 30 is along the outer surfaces 121S and 122S of the fixed blade 121 and the moving blade 122, and the inner opening 34ui of the U-phase slot 34u and the moving blade 122-fixed blade. The iron core 30 is arranged so that the gap between the two faces 121 (see FIG. 12).

  Next, as shown in FIG. 13, when the stripper 125 is moved (raised) in the first axial direction DX1, the strands of the U-phase coil 51 are pushed up by the pusher blade 125P of the stripper 125 in a line. Then, the strands 40 forming the U-phase coil 51 are sequentially inserted into the U-phase slot 34u. At this time, the wire positioned on the upper side of the U-phase coil 51 is inserted into the U-phase slot 34u first.

Then, as shown in FIG. 14, when the stripper 125 is further raised, the U-phase winding 50 (wire 40) forming the U-phase coil 51 passes over the tip 121T of the fixed blade 121 in order and radially outwards (see FIG. 14). Move to the middle left). The insertion of the U-phase coil 51 is completed when all the strands 40 have passed over the tip 121T of the fixed blade 121 (see FIG. 15).
At this time, since the position of the tip 121T of the fixed blade 121 in the first axial direction DX1 has not changed during the pushing-up period, the height of the portion of each strand 40 positioned on the surface of the iron core 30 is , It is almost the same for every strand. Therefore, when the U-phase coil 51 is inserted into the U-phase slot 34u by such a method, the U-phase winding 50 that forms the U-phase coil 51 using the winding device 110 as shown in FIG. Although the circumferential length of each turn of the U-phase coil 51 after the insertion is formed so that the winding portion of the turn to be inserted later is wound longer, the shape of the U-phase coil 51 after insertion is on the surface 30A of the iron core 30. The back surface 30B is largely different and has an asymmetric shape. Therefore, if the shape is kept as it is, when the diameter of the connecting portion 52A of the U-phase coil 51 is enlarged and shaped as described later, the length of the winding of this portion is insufficient at each connecting portion 52A or the like. By doing so, or on the contrary, it is impossible to form a coil end portion having an appropriate shape.

  Therefore, in this embodiment, the stripper 125 is further raised as shown in FIG. By the way, each strand 40 that has passed over the tip 121T of the fixed blade 121 is given a tendency to incline slightly inward in the first axial direction DX1 (upper side in the figure) from the surface 30A of the iron core 30 (see FIG. 15). . Therefore, when the stripper 125 is further raised after all the strands 40 have passed over the tip 121T of the fixed blade 121, the strands that come into contact with the stripper 125 are also rubbed as the push-up blade 125P of the stripper 125 rises. Is raised by being dragged by this.

  Then, the strand adjacent to this strand is also raised. Thus, each strand 40 is pulled up in order, and as shown in FIG. 16, among the windings 50 (elements 40) forming the U-phase coil 51, the one located on the inner side is the surface of the iron core 30. On 30A, U-phase coil 51 is inserted into U-phase slot 34u in a configuration that is highly pulled out. In addition, the outer U-phase slot corresponding portion 57s located at the radially outer end 34usp in the U-phase slot 34u is longer than the inner U-phase slot corresponding portion 57i located at the radially inner end 34uip. Is getting shorter.

Further, when inserting the U-phase coil 51, by appropriately setting the position of the tip 121T of the fixed blade 121, among the windings 50 (wires 40) forming the U-phase coil 51, as shown in FIG. The portion located on the front surface 30A (upper side in the drawing) of the iron core 30 and the portion located on the back surface 30B (lower side in the drawing) can be made symmetrical.
After the U-phase coil 51 is inserted into the U-phase slot 34u, the wedge paper 83 is inserted and arranged near the inner opening 34ui of the U-phase slot 34u by a known method, and the U-phase winding 50 (element wire 40). ) Is prevented from protruding inward from the opening. Thus, the U-phase coil 51 could be inserted into the iron core 30.

  Next, the coil end portion 58A and the like of the U-phase coil 51, specifically, the first axial direction DX1 (upper side in the drawing) and the second axial direction DX2 of the V-phase slot 34v and the W-phase slot 34w are known by a known method. The U-phase surface side crossover portion 52A and the U-phase backside crossover portion 52B located on the (lower side in the figure) are pressed outward in the radial direction, and these are pressed in each slot 34u and the like in FIG. , (B), (c). Specifically, in the first axial direction DX1 (upper side in the figure) and the second axial direction DX2 (lower side in the figure) of the V-phase slot 34v and the W-phase slot 34w, the U-phase surface side crossover portion 52A and the U-phase back surface The side crossing portion 52B is pressed toward the radially outer side, but at least a part of these is radially inward of the radially outer end 34vs of the V-phase slot 34v and the radially outer end 34ws of the W-phase slot 34w. Press only to the extent that it is located (right side in the figure). By doing in this way, in the U-phase slot 34u, the U-phase front surface side aggregation portion 56A and the U-phase back surface side aggregation portion 56B have the form shown in FIG.

Here, of the continuous winding portion in the U-phase slot corresponding portion 57 including the U-phase surface side aggregation portion 56A, the U-phase slot insertion portion 53, and the U-phase back surface side aggregation portion 56B, the radially outer end portion 34usp As shown by a broken line in FIG. 17A, the outer U-phase slot corresponding portion 57s that passes through the first insulating portion 80 in the first axial direction DX1 (upper side in the drawing) than the cuff 80A of the slot insulating paper 80 and more than the cuff 80B. In the second axial direction DX2 (lower side in the figure), it is bent toward the radially outer side (left side in the figure).
On the other hand, as shown by a broken line in FIG. 17A, the inner U-phase slot corresponding portion 57i passing through the radially inner end 34uip is radially outer (on the left side in the drawing) in the first axial direction DX1 than the cuff 80A. ) In the first axial direction DX1 (upper side in the figure). Further, in the U-phase rear surface side consolidating portion 56B, the second phase direction DX2 extends from the cuff 80B in the second axial direction DX2 (lower side in the figure) while being bent radially outward (left side in the figure) in a substantially parabolic shape. Formed.

Conversely, as shown in FIG. 9, the circumferential length of each turn of the U-phase winding 50 forming the U-phase coil 51 is wound in advance as the winding portion of the turn inserted later. In addition, when the U-phase coil 51 is inserted into the U-phase slot 34u, the above-described method is used so as to form the U-phase coil 51 shown in FIG. It can be said that the U-phase coil end portions 58A and 58B shown in FIGS.
After the U-phase coil 51 is shaped, the U-V interphase insulating paper 81 is disposed so as to contact the U-phase coil end portions 58A, 58B from the radially inner side (right side in the figure).

Next, the process of inserting the V-phase coil 61 will be described. First, as shown in FIG. 18, a V-phase coil 61 is formed using a winding device (not shown). In the V-phase coil 61, the circumferential lengths of the winding portions for each turn of the V-phase winding 60 (element wire 40) forming the V-phase coil 61 are almost equal. As will be described later, since the V-phase coil 61 is inserted into and mounted in the V-phase slot 34v of the iron core 30, the circumferential length of each turn of the V-phase winding 60 forming the V-phase coil 61 is substantially equal. Become. Further, as indicated by a broken line in the figure, the lowermost winding portion includes the aforementioned inner V-phase slot corresponding portion 67i, and the uppermost winding portion corresponds to the outer V-phase slot. The portion 67s is included.
Similarly to the U-phase coil 51, the molded V-phase coil 61 is set on the inserter 120 from above the fixed blade 121 (see FIG. 18).

  After setting the V-phase coil 61 in the inserter 120, as shown in FIG. 19, the stator core 30 in which the U-phase coil 51 has already been inserted is set in its predetermined position. Note that, in FIG. 19, a cross section broken at the V-phase slot 34 v is shown, and therefore, the transition portions 52 </ b> A and 52 </ b> B of the U-phase coil 51 appear in the drawing. Specifically, the inner peripheral surface 30C of the iron core 30 is along the outer surfaces 121S and 122S of the fixed blade 121 and the moving blade 122, and the inner opening 34vi of the V-phase slot 34v and the moving blade 122-fixed blade. The iron core 30 is arranged so that the gap between the two faces 121 (see FIG. 12).

  Next, as shown in FIG. 20, when the stripper 125 is moved (raised) in the first axial direction DX1, the strands of the V-phase coil 61 are pushed up by the pusher blade 125P of the stripper 125 in a line. Then, the strands 40 forming the V-phase coil 61 are sequentially inserted into the V-phase slot 34v. At this time, the wire located on the upper side of the V-phase coil 61 is inserted into the V-phase slot 34v first. At this time, the U-phase back side crossover portion 52B of the U-phase coil 51 that has already been inserted exists in the second axial direction DX2 of the V-phase slot 34v. However, as the insertion width Wv, a size that is 1/2 or more of the radial dimension of the V-phase slot 34v is secured, and no problem occurs in insertion. About the part which interferes with this at the time of insertion of the V-phase coil 61, it is inserted, changing a form and a place so that the strand 40 may bend inside.

Then, as shown in FIG. 21, when the stripper 125 is further raised, the V-phase winding 60 (element wire 40) forming the V-phase coil 61 gets over the tip 121T of the fixed blade 121 in order, and the outer side in the radial direction in that order. Move to the left side of the figure. When all the strands 40 get over the tip 121T of the fixed blade 121, the insertion of the V-phase coil 61 is completed (see FIG. 22).
Since the position of the tip 121T of the fixed blade 121 in the first axial direction DX1 does not change during the pushing-up period, the height of the portion of each strand 40 that is located on the surface of the iron core 30 is any element. The same is true for the lines. In addition, the outer V-phase slot corresponding portion 67s located at the radially outer end 34vsp in the V-phase slot 34v is longer than the inner V-phase slot corresponding portion 67i located at the radially inner end 34vip. Are almost the same.

Further, when inserting the V-phase coil 61, by appropriately setting the position of the tip 121T of the fixed blade 121, among the windings 60 (wires 40) forming the V-phase coil 61, as shown in FIG. The portion located on the front surface 30A (upper side in the drawing) of the iron core 30 and the portion located on the back surface 30B (lower side in the drawing) can be made symmetrical.
Thereafter, after the V-phase coil 61 is inserted into the V-phase slot 34v, the wedge paper 83 is inserted and disposed near the inner opening 34vi of the V-phase slot 34v, as in the case of the U-phase. Thus, the V-phase coil 61 could be inserted into the iron core 30.

  As described above, in practice, the circumference of each turn of the V-phase coil 61 is adjusted so that the inner V-phase slot corresponding portion 67i is slightly longer than the outer V-phase slot corresponding portion 67s. Therefore, as in the case of the U-phase coil 51 described above, the stripper 125 is lifted up after each strand 40 forming the V-phase coil 61 has passed over the tip 121T of the fixed blade 121, and each strand 40 Of these, the height of the portion located on the surface of the iron core 30 may be finely adjusted so as to be higher toward the inner one.

  Next, the coil end portion 68A and the like of the V-phase coil 61, specifically, the first axis direction DX1 (upper side in the figure) and the second axis direction DX2 of the W-phase slot 34w and the U-phase slot 34u are known by a known method. The V-phase front surface side crossover portion 62A and the V-phase back surface side crossover portion 62B located on the (lower side in the drawing) are pressed outward in the radial direction, and these are pressed in each slot 34v and the like in FIG. , (B), (c). Specifically, in the first axial direction DX1 (upper side in the figure) and the second axial direction DX2 (lower side in the figure) of the W-phase slot 34w and the U-phase slot 34u, the V-phase surface-side transition portion 62A and the V-phase back surface The side crossing 62B is pressed toward the outside in the radial direction. However, at least a part of these is pressed only to the extent that it is located radially inward (right side in the figure) with respect to the radial center position 34vm of the W-phase slot 34w and the radial center position 34um of the U-phase slot 34u. By doing in this way, in the V-phase slot 34v, the V-phase front surface side aggregation portion 66A and the U-phase back surface side aggregation portion 66B have the form shown in FIG.

Here, out of the continuous winding portion in the V-phase slot corresponding portion 67 including the V-phase surface side aggregation portion 66A, the V-phase slot insertion portion 63, and the V-phase back surface side aggregation portion 66B, the radially outer end portion 34vsp. As shown by a broken line in FIG. 23 (b), the outer V-phase slot corresponding portion 67s passing in the first axial direction DX1 (upper side in the drawing) than the cuff 80A of the slot insulating paper 80 and the cuff 80B. In the second axial direction DX2 (lower side in the figure), it bends slightly inward in the radial direction (right side in the figure) and in the first axial direction DX1 (upper side in the figure) or in the second axial direction DX2 (lower side in the figure) It is made into the form extended.
On the other hand, the inner V-phase slot corresponding portion 67i passing through the radially inner end 34vip is radially outer (on the left side in the drawing) in the first axial direction DX1 than the cuff 80A, as shown by the broken line in FIG. ) Slightly bent in the first axial direction DX1 (upper side in the figure). Further, the V-phase rear surface side converging portion 66B extends from the cuff 80B to the second axial direction DX2 (lower side in the figure) while slightly bending radially outward (left side in the figure) in the second axial direction DX2. The

Conversely, as shown in FIG. 18, the circumference of each turn of the V-phase winding 60 that forms the V-phase coil 61 is set in advance so as to be wound substantially equally for each turn. When the phase coil 61 is inserted into the V-phase slot 34v, the phase coil 61 is inserted into the form of the V-phase coil 61 shown in FIG. 22 by the above-described method, so that FIG. 23 (a), (b), It can be said that the configuration of the V-phase coil end portions 68A and 68B shown in FIG.
After shaping the V-phase coil 61, the V-W interphase insulating paper 82 is disposed so as to contact the V-phase coil end portions 68A and 68B from the radially inner side (right side in the figure).

  Furthermore, the process of inserting the W-phase coil 71 will be described. First, as shown in FIG. 24, similarly to the case of the U phase, the winding device 110 is used to wind the W phase winding 60 around the winding frame 112 to form a substantially oval shape. Mold. The reel 112 has a fixed reel 112F whose position is fixed, and a movable reel 112M that can move in parallel as indicated by a two-dot chain line in the drawing. Further, the moving-side reel 112M has a six-step shape that becomes narrower toward the lower side in the figure, contrary to the above-described moving-side reel 111M. Therefore, as shown in the drawing, the W-phase winding 70 is wound between the fixed-side winding frame 112F and the moving-side winding frame 112M so as to be wound one turn at each stage of the moving-side winding frame 112M. Thereafter, the moving-side reel 1112 is moved so as to approach the fixed-side reel 112F (right side in the figure), and the wound W-phase winding 70 is dropped downward as indicated by the arrow, so that the W-phase winding A W-phase coil 71 formed with 70 is obtained.

Here, since the W-phase coil 71 is formed using the above-described winding device 110, the W-phase coil 70 is positioned on the lower side in the figure of the W-phase winding 70 (element wire 40) forming the W-phase coil 71. The circumference of the winding portion is shortened. As will be described later, since the W-phase coil 71 is inserted and mounted in the W-phase slot 34w of the iron core 30, the circumference of each turn of the W-phase winding 70 forming the W-phase coil 71 is inserted later. As a result, the winding portion of the turn has a shorter winding shape. Further, as indicated by a broken line in the figure, the lowermost winding portion includes the aforementioned inner W-phase slot corresponding portion 77i, and the uppermost winding portion corresponds to the outer W-phase slot. The portion 77s is included.
Like the U-phase coil 51, the molded W-phase coil 71 is set on the inserter 120 from above the fixed blade 121 (see FIG. 25).

  After setting the W-phase coil 71 in the inserter 120, as shown in FIG. 26, the stator core 30 in which the U-phase coil 51 and the V-phase coil 61 have already been inserted is set in its predetermined position. In FIG. 26, a cross section broken by the W-phase slot 34 w is shown, and therefore, of the U-phase and V-phase coils 51 and 61, the transition portions 52 </ b> A, 52 </ b> B, 62 </ b> A, and 62 </ b> B appear in the drawing. Specifically, the inner peripheral surface 30C of the iron core 30 is along the outer surfaces 121S and 122S of the fixed blade 121 and the moving blade 122, and the inner opening 34wi of the W-phase slot 34w and the moving blade 122-fixed blade. The iron core 30 is arranged so that the gap between the two faces 121 (see FIG. 12).

  Next, as shown in FIG. 27, when the stripper 125 is moved (raised) in the first axial direction DX1, the strands of the W-phase coil 71 are pushed up by the pusher blade 125P of the stripper 125 in a line. Then, the strands 40 forming the W-phase coil 71 are sequentially inserted into the W-phase slot 34w. At this time, the wire located on the upper side of the W-phase coil 71 is first inserted into the W-phase slot 34w. At this time, the U-phase backside transition part 52B of the U-phase coil 51 and the V-phase backside transition part 62B of the V-phase coil 61 that are already inserted are present in the second axial direction DX2 of the W-phase slot 34w. Yes. However, as the insertion width Ww, a size of 1/3 or more of the radial dimension of the W-phase slot 34w is secured, and no problem occurs in insertion. About the part which interferes with these at the time of insertion of the W-phase coil 71, it is inserted, changing a form and a place so that the strand 40 may bend inside.

Then, as shown in FIG. 28, when the stripper 125 is further raised, the W-phase winding 70 (element wire 40) forming the W-phase coil 71 passes over the tip 121T of the fixed blade 121 in order, and the radially outer side in that order. Move to the left side of the figure. However, in this embodiment, only some of the strands are stopped to get over the tip 121T of the fixed blade 121, and the remaining strands are not yet over the tip 121T and are locked to the fixed blade 121. The insertion of the W-phase coil 71 is completed.
After that, the wedge paper 83 is inserted and arranged near the inner opening 34wi of the W-phase slot 34w, as in the U-phase and V-phase. This prevents the W-phase winding (element 40) from protruding from the inner opening 34wi even though a part of the element 40 forming the W-phase coil 71 is locked to the fixed blade 121. The W-phase coil 61 could be inserted into the iron core 30. Thereafter, the stripper 125 is lowered and retracted.

Since the position of the tip 121T of the fixed blade 121 in the first axial direction DX1 does not change during the push-up period, of the wires 40, the wires that have passed over the tip 121T are on the surface of the iron core 30. The height of the position is almost the same for every strand.
However, among the strands 40, the strands that have not yet passed over the tip 121T are insufficiently pushed up by the amount that has not reached the tip 121T. Moreover, since the strands are held in a line at the gap between the fixed blade 121 and the moving blade 122, when compared between adjacent strands, the height of the lift is roughly the same as the diameter of each strand. It is thought that there will be a difference. That is, between the fixed blade 121 and the movable blade 122, the lower the strand held, the lower the pushing height, so that the fixed blade 121 is moved relatively in the axial direction by lifting the iron core 30 or the like. When this is retracted, the W-phase coil 71 is inserted in such a form that the higher the surface 30A of the iron core 30 is, the lower the strand inserted later among the strands.

Moreover, the outer V-phase slot corresponding portion 77s located at the radially outer end 34wsp in the W-phase slot 34w is longer than the inner W-phase slot corresponding portion 77i located at the radially inner end 34wip. Is getting longer.
Further, when inserting the W-phase coil 71, by appropriately setting the position of the tip 121T of the fixed blade 121, the winding 70 (wire 40) forming the W-phase coil 71 can be understood from the form of FIG. Among these, the portion located on the front surface 30A (upper side in the drawing) of the iron core 30 and the portion located on the rear surface 30B (lower side in the drawing) can be made symmetrical.

  Next, the coil end portions 78A and 78B of the W-phase coil 71, specifically, a W-phase surface side crossover portion 72A, a W-phase surface side aggregation portion 76A, a W-phase backside crossover portion 72B, and The W-phase back side aggregate portion 76A is pressed outward in the radial direction, and as shown in FIGS. 5 to 7, these are all positioned radially outward from the inner peripheral surface 30C of the iron core 30.

Thus, of the continuous winding portion in the W-phase slot corresponding portion 77 composed of the W-phase front side aggregation portion 76A, the W-phase slot insertion portion 73, and the W-phase rear surface side aggregation portion 76B, the radially outer end 34upp is The outer W-phase slot corresponding portion 77s that passes therethrough is directed radially inward (left side in the figure) in the first axial direction DX1 (upper side in the figure) than the cuff 80A of the slot insulating paper 80, as indicated by a broken line in FIG. And bent in the first axial direction DX1 (upper side in the figure). In addition, in the second axial direction DX2 (lower side in the figure) than the cuff 80B, it is bent toward the radially inner side (left side in the figure) and extends in the second axial direction DX2 (lower side in the figure). The
On the other hand, the inner W-phase slot corresponding portion 77i passing through the radially inner end 34wip is, as shown by a broken line in FIG. 7, in the first axial direction DX1 (upper side in the drawing) in the first axial direction DX1 than the cuff 80A. It is set as the form extended substantially linearly. Further, in the second axial direction DX2 from the cuff 80B, the second axial direction DX2 (lower side in the drawing) extends in a substantially linear shape.

Conversely, as shown in FIG. 24, the circumference of each turn of the W-phase winding 70 forming the W-phase coil 71 is wound in advance so as to be shorter as the circumference of each turn inserted later. In addition, when the W-phase coil 71 is inserted into the W-phase slot 34w, the W-phase coil 71 is inserted in the form of the W-phase coil 71 shown in FIG. 5 It can be said that W-phase coil end portions 78A and 78B shown in FIG.
Thus, it was possible to manufacture the stator 20 in which the U-phase, V-phase, and W-phase coils 51, 61, 71 were inserted into the iron core 30, respectively.

  Furthermore, the motor 10 is completed by assembling the stator 20 manufactured by the manufacturing method described above and the rotor 11 manufactured by a known method by a known method.

In this embodiment, the space factor of the winding wire (element wire) for each slot 34u and the like is about 70%, and theoretically about 78% when the element wire 40 has a circular cross section. Considering that is the upper limit, the value is very high.
In this embodiment, the space factor is the insertion of the winding 50 or the like (elementary wire 40) excluding the area of the slot insulating paper 80 or the wedge paper 83 from the cross-sectional area of the slot 34u or the like. This is the ratio of the total cross-sectional area (including the insulation coating portion) of the inserted winding 50 or the like (element wire 40) to the effective slot cross-sectional area that is the cross-sectional area of the possible portion.

In the above, the present invention has been described with reference to the embodiments. However, the present invention is not limited to the above embodiments, and it is needless to say that the present invention can be appropriately modified and applied without departing from the gist thereof.
For example, in the present embodiment, an example in which the U-phase coil 51 and the W-phase coil 71 are formed using the reels 111 and 112 shown in FIG. 9 or FIG. 24 is shown, but another form of winding device is used. A U-phase coil or a W-phase coil may be formed.
Further, in this embodiment, when the W-phase coil 71 is inserted, as shown in FIG. 28, as shown in FIG. 28, the stripper finishes ascending in a state where some of the strands 40 still do not get over the tip 121 </ b> T of the fixed blade 121. To complete the insertion process. However, it may be adjusted by other methods so that the pushed-up height becomes lower as the strand to be inserted later.

Furthermore, in the stator 20 of the present embodiment, as shown in FIGS. 6 and 7, most of the U-phase front side crossover portion 52A and the U-phase backside crossover portion 52B of the U-phase coil 51 are V-phase slots. The arrangement is located on the radially outer side (left side in the figure) of the radially outer end 34vs of 34v and the radially outer end 34ws of the W-phase slot 34w. However, these may be positioned radially inward of the present embodiment, and most of the U-phase surface side crossover portion 52A and the U-phase backside crossover portion 52B are formed by the radial outside end 34vs and the radial outside. It is good also as arrangement | positioning located inside radial direction rather than the end 34ws. Furthermore, all of these may be disposed radially inward of the radially outer end 34vs and the radially outer end 34ws.
In this embodiment, an example in which the present invention is applied to a three-phase eight-pole stator and motor has been shown. However, in this embodiment, the technique used for inserting a U-phase coil or a W-phase coil is a multi-phase stator. Can also be used when inserting the first phase and inserting the final phase.

It is a schematic diagram of the motor concerning an Example. It is a schematic diagram of the stator concerning an Example. (A) is a top view of a stator iron core, (b) is a longitudinal cross-sectional view of a stator iron core. It is explanatory drawing which shows the relationship between a slot, a coil, and its part about the stator concerning an Example. FIG. 5 is a cross-sectional view taken along the line U-U in FIG. FIG. 5 is a VV cross-sectional arrow view of FIG. 4 for the stator according to the example. FIG. 5 is a cross-sectional view of the stator according to the embodiment taken along the line WW in FIG. 4. It is a partial expanded sectional view which shows the state by which the coil | winding (elementary wire) was inserted in the slot of a stator. It is explanatory drawing which shows a mode that a U-phase coil | winding is wound using a winding apparatus and a U-phase coil is shape | molded. It is explanatory drawing which shows a mode that the shape | molded U-phase coil is set to an inserter. It is explanatory drawing which shows the state which set the stator iron core further to the inserter. It is a YY cross-sectional arrow view in the state shown in FIG. It is explanatory drawing which shows the state which pushed up the U phase coil set to the inserter further with a stripper, and inserted a part of U phase coil in the U phase slot of the stator. It is explanatory drawing which shows the state which pushed up the U-phase coil set to the inserter with the stripper, and got over the front-end | tip of a stationary blade about a part of U-phase coil. It is explanatory drawing which shows a mode that the U phase coil set to the inserter is further pushed up with a stripper, the tip of a fixed braid | blade is passed over any of the strands which comprise a U phase coil, and wedge paper is inserted. It is explanatory drawing which shows the state which raised the stripper further from the state shown in FIG. Of the U-phase coils inserted and attached to the stator core, the U-phase front side crossing portion and the U-phase back side crossing portion are enlarged in diameter, and the U-V interphase insulating paper is arranged. FIG. 5B is a cross-sectional view of the phase slot, FIG. 5B is a cross-sectional view of the V-phase slot, and FIG. It is explanatory drawing which shows a mode that the shape | molded V phase coil is set to an inserter. It is explanatory drawing which shows the state which set the stator iron core in which the U-phase coil was already inserted and mounted on the inserter. It is explanatory drawing which shows the state which pushed up the V phase coil set to the inserter with the stripper, and inserted a part of V phase coil in the V phase slot of the stator. It is explanatory drawing which shows the state which pushed up the V phase coil set to the inserter further with a stripper, and got over the front-end | tip of a stationary blade about a part of V phase coil. It is explanatory drawing which shows a mode that the V-phase coil set to the inserter is further pushed up with a stripper, the tip of a fixed blade is overcome over any of the strands forming the V-phase coil, and wedge paper is inserted. Of the V-phase coils inserted and attached to the stator core, the V-phase front side crossing portion and the V-phase back side crossing portion are enlarged in diameter, and the V-W interphase insulating paper is disposed. FIG. 5B is a cross-sectional view of the phase slot, FIG. 5B is a cross-sectional view of the V-phase slot, and FIG. It is explanatory drawing which shows a mode that a W phase coil | winding is wound using a winding apparatus and a W phase coil is shape | molded. It is explanatory drawing which shows a mode that the shape | molded W phase coil is set to an inserter. It is explanatory drawing which shows the state which set the stator core in which the U-phase coil and the V-phase coil were already inserted and mounted on the inserter. It is explanatory drawing which shows the state which pushed up further the W phase coil set to the inserter with a stripper, and inserted a part of W phase coil in the W phase slot of a stator. It is explanatory drawing which shows a mode that the U phase coil set to the inserter is pushed up with a stripper, a tip of a fixed blade is moved over a part of U phase coil, and wedge paper is inserted.

Explanation of symbols

DX Axial direction DX1 First axial direction DX2 Second axial direction 10 Motor 11 Rotor 20 Stator 30 Stator core 30X Central axis (axis) of the stator core
30A Front surface 30B (of the stator core) Back surface 30C (of the stator core) Inner peripheral surface 31 (of the stator core) Teeth (inner teeth)
32 (stator core) slot 34u U phase slot (first phase slot)
34us (U phase slot) radially outer end 34usp (U phase slot) radially outer end 34ui (U phase slot) inner opening 34uip (U phase slot) radially inner end 34um (U phase slot) ) Radial center position 34v V-phase slot 34vs radial outer end 34vsp (V-phase slot) radial outer end 34vi (V-phase slot) inner opening 34vip (V-phase slot) radial Inner end 34 vm radial center position 34 w (V phase slot) W phase slot (final phase slot)
34ws Radial outer end 34wsp (W-phase slot) radially outer end 34wi (W-phase slot) inner opening 34wip (W-phase slot) radially inner end 34wm (W-phase slot) ) Radial center position 40 Wire 50 U phase winding (first phase winding)
51 U-phase coil 52A U-phase surface side transition portion 52B U-phase rear surface side transition portion 53 U-phase slot insertion portion 56A U-phase surface side aggregation portion 56B U-phase rear surface side aggregation portion 57 U-phase slot corresponding portion 57s outer U-phase slot correspondence Portion 57i Inner U phase slot corresponding portion 58A U phase surface side coil end portion 58B U phase back surface side coil end portion 60 V phase winding 61 V phase coil 62A V phase surface side transition portion 62B V phase rear surface side transition portion 63 V phase Slot insertion portion 66A V phase surface side aggregation portion 66B V phase back surface side aggregation portion 67 V phase slot corresponding portion 67s Outer V phase slot corresponding portion 67i Inner V phase slot corresponding portion 68A V phase surface side coil end portion 68B V phase back surface side Coil end 70 W phase winding (final phase winding)
71 W-phase coil 72A W-phase surface side transition portion 72B W-phase back surface side transition portion 73 1st W-phase slot insertion portion 74 2nd W-phase slot insertion portion 76A W-phase surface side aggregation portion 76B W-phase back surface aggregation portion 77 W-phase slot Corresponding portion 77s Outer W phase slot corresponding portion 77i Inner W phase slot corresponding portion 78A W phase surface side coil end portion 78B W phase rear surface side coil end portion 111, 112 Reel 121 Fixed blade 121T (fixed blade) tip 125 Stripper 125P Push-up blade (stripper)

Claims (12)

A U-phase slot composed of the inner teeth adjacent to each other among the three-phase distributed winding stator cores of U-phase, V-phase, and W-phase in a ring shape having a front surface and a back surface parallel to the front surface. A plurality of U-phase coils formed by winding a U-phase winding in advance in a V-phase slot and a W-phase slot, a plurality of V-phase coils formed by winding a V-phase winding in advance, and a W-phase winding. A stator in which a plurality of W-phase coils formed by winding in advance are respectively inserted in this order,
Of the axial directions of the stator core, when the direction from the back surface to the front surface is the first axial direction and the opposite is the second axial direction,
The W-phase winding forming the W-phase coil is
W-phase slot insertion portions respectively inserted into the paired W-phase slots;
Among the W-phase slots forming the pair, a W-phase front side crossing portion that crosses over the surface of the stator core, and a W-phase back side crossing portion that crosses over the back surface;
The windings interposed between the W-phase slot insertion portion and the W-phase surface side crossing portion, in a first axis direction of the W-phase slot, aggregate the windings extending from the W-phase slot insertion portion. A W-phase surface side converging part connected to the W-phase surface side crossing part;
The winding interposed between the W-phase slot insertion portion and the W-phase back side crossing portion, and collecting the windings extending from the W-phase slot insertion portion in the second axis direction of the W-phase slot, A W-phase back side converging part connected to the W-phase back side crossing part,
The V-phase winding forming the V-phase coil is
A V-phase slot insertion portion inserted into each of the paired V-phase slots;
Among the paired V-phase slots, a V-phase front side crossing portion that crosses the surface of the stator core, and a V-phase back side crossing portion that crosses the back surface;
The windings interposed between the V-phase slot insertion part and the V-phase surface side crossing part and gathering the windings extending from the V-phase slot insertion part in the first axial direction of the V-phase slot A V-phase surface side converging part connected to the V-phase surface side crossover part,
The windings interposed between the V-phase slot insertion part and the V-phase back side crossing part are aggregated with the windings extending from the V-phase slot insertion part in the second axis direction of the V-phase slot. A V-phase back side converging part connected to the V-phase back side crossing part,
The U-phase winding forming the U-phase coil is
A U-phase slot insertion portion inserted into each U-phase slot forming a pair;
Of the U-phase slots forming the pair, a U-phase surface side crossover portion that crosses over the surface of the stator core, and a U-phase backside crossover portion that crosses over the back surface;
The winding intervening between the U-phase slot insertion portion and the U-phase surface side crossing portion, and collecting the windings extending from the U-phase slot insertion portion in the first axial direction of the U-phase slot A U-phase surface side converging part connected to the U-phase surface side crossover part;
The winding interposed between the insertion portion in the U-phase slot and the U-phase back side crossing portion and collecting the windings extending from the insertion portion in the U-phase slot in the second axis direction of the U-phase slot A U-phase back side converging part connected to the U-phase back side crossing part,
On the surface of the stator iron core,
The W-phase surface side transition portions of the plurality of W-phase coils are all radially outward from the inner peripheral surface of the stator iron core and have a diameter greater than the radial center position of the U-phase slot and V-phase slot. Placed inside the direction,
The V-phase surface side crossover portions of the plurality of V-phase coils are all
In the first axial direction of the U-phase slot, the W-phase surface side crossing portion is closely contacted from the outside in the radial direction via the V-W interphase insulating paper,
It is arranged radially outside the W-phase surface side crossing portion and radially inside the radially outer ends of the W-phase slot and U-phase slot,
Each of the U-phase surface side crossover portions of the plurality of U-phase coils is
In the first axial direction of the W-phase slot, the V-phase surface side crossing portion is closely contacted from the outside in the radial direction through the U-V interphase insulating paper,
It is arranged in the first axial direction at the radially outer end of the V-phase slot and the W-phase slot at the radially outer side than the V-phase surface side crossing portion,
On the back surface of the stator core,
The W-phase back side crossing portions of the plurality of W-phase coils are all radially outward from the inner peripheral surface of the stator core and have a diameter greater than the radial center position of the U-phase slot and V-phase slot. Placed inside the direction,
The V-phase back side crossover portions of the plurality of V-phase coils are all
In the second axis direction of the U-phase slot, closely contact the W-phase back side crossing portion from the outside in the radial direction through the V-W interphase insulating paper,
It is arranged radially outside the W-phase back side crossover portion and radially inside the radially outer ends of the W-phase slot and U-phase slot,
The U-phase back side crossover portions of the plurality of U-phase coils are all
In the second axis direction of the W-phase slot, the V-phase back side crossing portion is closely contacted from the outside in the radial direction via the U-V interphase insulating paper,
A stator that is arranged radially outside the V-phase back side crossing portion and in the second axial direction at the radially outer ends of the V-phase slot and W-phase slot. A U-phase slot composed of the inner teeth adjacent to each other among the three-phase distributed winding stator cores of U-phase, V-phase, and W-phase in a ring shape having a front surface and a back surface parallel to the front surface. A plurality of U-phase coils formed by winding a U-phase winding in advance in a V-phase slot and a W-phase slot, a plurality of V-phase coils formed by winding a V-phase winding in advance, and a W-phase winding. A plurality of W-phase coils formed by winding in advance are stators each inserted in this order,
Of the axial directions of the stator core, when the direction from the back surface to the front surface is the first axial direction and the opposite is the second axial direction,
The U-phase winding forming the U-phase coil is
A U-phase slot insertion portion inserted into each U-phase slot forming a pair;
Of the U-phase slots forming the pair, a U-phase surface side crossover portion that crosses over the surface of the stator core, and a U-phase backside crossover portion that crosses over the back surface;
The winding intervening between the U-phase slot insertion portion and the U-phase surface side crossing portion, and collecting the windings extending from the U-phase slot insertion portion in the first axial direction of the U-phase slot A U-phase surface side converging part connected to the U-phase surface side crossover part;
The winding interposed between the insertion portion in the U-phase slot and the U-phase back side crossing portion and collecting the windings extending from the insertion portion in the U-phase slot in the second axis direction of the U-phase slot A U-phase back side converging part connected to the U-phase back side crossing part,
The V-phase winding forming the V-phase coil is
A V-phase slot insertion portion inserted into each of the paired V-phase slots;
Among the paired V-phase slots, a V-phase front side crossing portion that crosses the surface of the stator core, and a V-phase back side crossing portion that crosses the back surface;
The windings interposed between the V-phase slot insertion part and the V-phase surface side crossing part and gathering the windings extending from the V-phase slot insertion part in the first axial direction of the V-phase slot A V-phase surface side converging part connected to the V-phase surface side crossover part,
The windings interposed between the V-phase slot insertion part and the V-phase back side crossing part are aggregated with the windings extending from the V-phase slot insertion part in the second axis direction of the V-phase slot. A V-phase back side converging part connected to the V-phase back side crossing part,
The W-phase winding forming the W-phase coil is
W-phase slot insertion portions respectively inserted into the paired W-phase slots;
Among the W-phase slots forming the pair, a W-phase front side crossing portion that crosses over the surface of the stator core, and a W-phase back side crossing portion that crosses over the back surface;
The windings interposed between the W-phase slot insertion portion and the W-phase surface side crossing portion, in a first axis direction of the W-phase slot, aggregate the windings extending from the W-phase slot insertion portion. A W-phase surface side converging part connected to the W-phase surface side crossing part;
The winding interposed between the W-phase slot insertion portion and the W-phase back side crossing portion, and collecting the windings extending from the W-phase slot insertion portion in the second axis direction of the W-phase slot, A W-phase back side converging part connected to the W-phase back side crossing part,
The U phase coil, V phase coil, and W phase coil are:
In the first axis direction of the U-phase slot,
The W-phase surface side transition portion is disposed radially outside the inner peripheral surface of the stator core and radially inside the radial center position of the U-phase slot,
The V-phase surface-side transition portion is in close contact with the W-phase surface-side transition portion via the V-W interphase insulating paper from the radially outer side, more radially outward than the W-phase surface-side transition portion, and Arranged radially inward from the radially outer end of the U-phase slot,
The U-phase surface-side aggregated portion is in close contact with the V-phase surface-side transition portion via the U-V interphase insulating paper from the radially outer side and the surface side. Arranged in the second axis direction,
In the second axis direction of the U-phase slot,
The W-phase back side crossing portion is disposed radially outside the inner peripheral surface of the stator core and radially inside the radial center position of the U-phase slot,
The V-phase back surface side crossing portion is in close contact with the W-phase back surface side crossing portion from the outside in the radial direction through the V-W interphase insulating paper, and is radially outside the W-phase back surface side crossing portion, and Arranged radially inward from the radially outer end of the U-phase slot,
The U-phase back side aggregated portion is in close contact with the V-phase back side crossing part through the U-V interphase insulating paper from the radially outer side and the back side, and more radially outward than the V-phase back side crossing part. Arranged in the first axis direction,
In the first axis direction of the V-phase slot,
The W-phase surface side crossing portion is disposed radially outside the inner peripheral surface of the stator core and radially inward from the radial center position of the V-phase slot,
The V-phase surface-side aggregated portion is in close contact with the W-phase surface-side transition portion via the V-W interphase insulating paper from the radially outer side and the surface side, and more radially outward than the W-phase surface-side transition portion. Arranged in the second axis direction,
The U-phase surface-side transition portion is in close contact with the V-phase surface-side aggregated portion from the outside in the radial direction through the U-V interphase insulating paper and on the inside in the radial direction from the radially outer end of the V-phase slot. The V-phase surface-side aggregated portion is arranged on the radially outer side,
In the second axis direction of the V-phase slot,
The W-phase back side crossing portion is arranged radially outside the inner peripheral surface of the stator core and radially inside the radial center position of the V-phase slot,
The V-phase back side converging part is in close contact with the W-phase back side crossing part via the V-W interphase insulating paper from the outside in the radial direction and the back side. Arranged in the first axis direction,
The U-phase back side crossing portion is in close contact with the V-phase back side converging portion from the outside in the radial direction through the U-V interphase insulating paper and at the inside in the radial direction from the radially outer end of the V-phase slot. The V-phase back side aggregated portion is arranged outside in the radial direction,
In the first axis direction of the W-phase slot,
The W-phase surface-side aggregated portion is arranged on the radially outer side than the inner peripheral surface of the stator core,
The V-phase surface-side transition portion is in close contact with the W-phase surface-side aggregated portion from the outside in the radial direction and from the surface side through the V-W interphase insulating paper, and is more radial than the W-phase surface-side aggregated portion. It is arranged between the outer side and the first axial direction, and radially inward from the radial center position of the W-phase slot, and radially inward from the radially outer end of the W-phase slot,
The U-phase surface-side transition portion is in close contact with the V-phase surface-side transition portion from the outside in the radial direction via the U-V interphase insulating paper and at the inside in the radial direction from the radially outer end of the W-phase slot. The V-phase surface side crossing portion is arranged radially outside,
In the second axis direction of the W-phase slot,
The W-phase back side aggregated portion is disposed radially outside the inner peripheral surface of the stator core,
The V-phase back side crossing portion is in close contact with the W-phase back side aggregated portion from the outside in the radial direction and from the back side via the V-W interphase insulating paper, and is more radial than the W-phase back side aggregated portion. It is arranged between the outer side and the second axial direction, and radially inward from the radial center position of the W-phase slot, and radially inward from the radially outer end of the W-phase slot,
The U-phase back side crossing portion is in close contact with the V-phase back side crossing portion from the outside in the radial direction through the U-V interphase insulating paper and at the inside in the radial direction with respect to the radially outer end of the W-phase slot. Thus, the stator is arranged on the outer side in the radial direction with respect to the V-phase back side crossover portion. The stator according to claim 1 or 2, wherein
Among the U-phase coils,
The U-phase surface side crossing portion is at least in the first axis direction of the V-phase slot and W-phase slot,
The U-phase back side crossing portion is at least in the second axis direction of the V-phase slot and W-phase slot,
In either case, the radial outer ends of the V-phase slot and the W-phase slot, or in the vicinity of the radial outer ends of the V-phase slot and the W-phase slot, more than the position radially outside the radial outer end. The stator is arranged on the radially inner side. The stator according to any one of claims 1 to 3,
The U-phase winding is
Among these, the U-phase winding of the U-phase winding corresponding to the U-phase slot corresponding portion comprising the U-phase surface-side converging portion, the U-phase slot insertion portion following the U-phase slot-side consolidating portion, When the length of the continuous winding portion is compared with each other according to the arrangement in the U-phase slot,
Compared to the length of the outer U-phase slot corresponding portion disposed at the radially outer end of the U-phase slot, the inner U-phase slot corresponding portion disposed at the radially inner end of the U-phase slot. The length of
The W-phase winding is
Among these, the W-phase winding in the W-phase slot corresponding portion comprising the W-phase surface side converging portion, the W-phase slot insertion portion that follows the W-phase slot-side consolidating portion, When the lengths of a series of winding parts are compared with each other according to the arrangement in the W-phase slot,
The portion corresponding to the inner W-phase slot arranged at the radially inner end of the W-phase slot as compared to the length of the portion corresponding to the outer W-phase slot arranged at the radially outer end of the W-phase slot. The length of is shortened,
The V-phase winding is
Among these, the V-phase winding in the V-phase slot corresponding portion, which is composed of the V-phase surface side converging portion, the V-phase slot insertion portion following the V-phase slot insertion portion, and the V-phase rear surface side converging portion following the V-phase slot concentrating portion. When the lengths of a series of winding parts are compared with each other according to the arrangement in the V-phase slot,
The portion corresponding to the inner V-phase slot disposed at the radially inner end of the V-phase slot as compared with the length of the portion corresponding to the outer V-phase slot disposed at the radially outer end of the V-phase slot. The length of
Equal or
A difference between a length of the outer U-phase slot corresponding portion in the U-phase winding and a length of the inner U-phase slot corresponding portion; and
The difference between the length of the outer W-phase slot corresponding portion and the length of the inner W-phase slot corresponding portion in the W-phase winding is smaller than any of the differences.
A stator that is lengthened or shortened. The stator according to any one of claims 1 to 4,
The space factor of the U-phase winding, V-phase winding, and W-phase winding inserted in the U-phase slot, V-phase slot, and W-phase slot is 50% or more for any phase. Stator made. The stator according to any one of claims 1 to 5,
The rotor,
Motor with. A U-phase slot composed of the inner teeth adjacent to each other among the three-phase distributed winding stator cores of U-phase, V-phase, and W-phase in a ring shape having a front surface and a back surface parallel to the front surface. A plurality of U-phase coils formed by winding a U-phase winding in advance in a V-phase slot and a W-phase slot, a plurality of V-phase coils formed by winding a V-phase winding in advance, and a W-phase winding. A method for manufacturing a stator, wherein a plurality of W-phase coils formed by winding in advance are inserted, and the U-phase coil, the V-phase coil, and the W-phase coil are assembled to the stator core,
Of the axial directions of the stator core, when the direction from the back surface to the front surface is the first axial direction and the opposite is the second axial direction,
A U-phase insertion step of inserting the U-phase slot insertion portion of the U-phase winding forming the U-phase coil into each U-phase slot of the stator core, and assembling the U-phase coil;
Among the U-phase windings forming the U-phase coil, a U-phase surface-side coil end portion located in the first axial direction from the front surface, and a U-phase back-side coil end located in the second axial direction from the back surface The U-phase surface side crossing portion extending over the surface of the stator core is disposed in the first axial direction at the radially outer end of the V-phase slot and W-phase slot, and the back surface of the stator core A U-phase coil end portion forming step for forming a U-phase back side crossing portion that crosses the upper side in a form that is arranged in the second axial direction of the radially outer ends of the V-phase slot and the W-phase slot;
Inserting a V-phase slot insertion portion of a V-phase winding forming the V-phase coil into each V-phase slot of the stator core, and assembling the V-phase coil;
Among the V-phase windings forming the V-phase coil, a V-phase surface-side coil end portion located in the first axial direction from the surface, and a V-phase back-side coil end located in the second axial direction from the back surface The diameter of the V-phase front surface side crossover portion and the V-phase back surface side crossover portion that crosses the back surface of the stator iron core are expanded in a radial direction from the radial center position of the V-phase slot and U-phase slot. V-phase coil end part molding step for forming the inner side in a form to be arranged radially inward from the radially outer end;
Inserting a W-phase slot insertion portion of a W-phase winding forming the W-phase coil into each W-phase slot of the stator core, and assembling the W-phase coil;
Among the W-phase windings forming the W-phase coil, a W-phase surface-side coil end portion located in the first axial direction from the front surface, and a W-phase back-side coil end located in the second axial direction from the back surface The W-phase surface-side transition portion and the W-phase back-side transition portion that crosses the surface of the stator core are expanded radially outside the inner peripheral surface of the stator core, A W-phase coil end forming step in this order, which is formed in a form that is arranged radially inward from the radial center position of the phase slot and V-phase slot,
The circumference of each turn of the U-phase winding forming the U-phase coil is wound longer as the winding portion of the turn inserted later,
The circumference of each turn of the W-phase winding forming the W-phase coil is wound shorter as the winding portion of the turn inserted later,
The circumference of each turn of the V-phase winding forming the V-phase coil is wound equally, or more than the difference in the circumference of each turn of the U-phase winding and each of the W-phase windings The winding part of the turn to be inserted later is wound longer or shorter with a small difference than the difference in the circumference of the turn,
The U-phase insertion step
About the above U-phase winding
The U-phase surface side coil end part and the U-phase back side coil end part are assembled so as to be symmetrical,
The V-phase insertion step is
About the above V-phase winding
The V-phase surface side coil end portion and the V-phase back surface side coil end portion are assembled so as to be symmetrical,
The W phase insertion step
About the above W-phase winding
A method for manufacturing a stator, wherein the W-phase surface side coil end portion and the W-phase back surface side coil end portion are assembled so as to be symmetrical. It is a manufacturing method of the stator according to claim 7,
The U-phase insertion step includes
About the last U-phase winding, the U-phase winding inserted in a line between the fixed blade and the moving blade from the back side of the stator core is pushed up by a stripper and inserted into the U-phase slot. A method of manufacturing a stator in which a stripper is moved in the first axial direction even after the tip of a fixed blade held at a predetermined position is overcome. A stator manufacturing method according to claim 7 or claim 8,
The W phase insertion step includes
A W-phase winding inserted in a line between the fixed blade and the moving blade from the back side of the stator core is pushed up by a stripper and inserted into the W-phase slot, and at least a part of the W-phase winding The stator manufacturing method in which the stripper is lifted and the wedge paper is inserted into the W-phase slot and then the stripper and the fixed blade are retracted before the tip of the fixed blade held at a predetermined position is moved over. Of the ring-shaped, internal-tooth shaped stator iron core having a front surface and a back surface parallel to the front surface, a corresponding coil of each phase is wound in advance in a slot composed of the internal teeth adjacent to each other. A method of manufacturing a stator in which a plurality of formed coils are sequentially inserted and the coils are assembled to the stator core,
Of the axial directions of the stator core, when the direction from the back surface to the front surface is the first axial direction and the opposite is the second axial direction,
Among the slots, a part of the first phase winding forming the first phase coil is inserted into the first phase slot in which the winding is first inserted in the plurality of phases, and the first phase coil is A first phase insertion step of assembling,
The circumference of each turn of the first phase winding forming the first phase coil is wound longer as the winding portion of the turn inserted later,
The first phase insertion step is
About the first phase winding, the first phase winding inserted in a line between the stationary blade and the moving blade from the back side of the stator core is pushed up by a stripper into the first phase slot. Inserting and after moving over the tip of the fixed blade held in place with respect to the last first phase winding, continue to move the stripper in the first axial direction beyond the tip of the fixed blade,
A portion of the first-phase winding is inserted into the first-phase slot to form a first-phase slot insertion portion, and a first position located in the first axial direction from the surface of the stator core. A method for manufacturing a stator, wherein the phase surface side coil end portion and the first phase back surface side coil end portion located in the second axial direction with respect to the back surface are symmetric. Of the ring-shaped, internal-tooth shaped stator iron core having a front surface and a back surface parallel to the front surface, a corresponding coil of each phase is wound in advance in a slot composed of the internal teeth adjacent to each other. A method of manufacturing a stator in which a plurality of formed coils are sequentially inserted and the coils are assembled to the stator core,
Of the axial directions of the stator core, when the direction from the back surface to the front surface is the first axial direction and the opposite is the second axial direction,
Of the slots, the final phase insertion in which the final phase coil is assembled by inserting a part of the final phase winding forming the final phase coil into the final phase slot in which the winding is inserted last among the plurality of phases. A process,
The circumference of each turn of the final phase winding forming the final phase coil is wound as short as the winding portion of the turn inserted later,
The final phase insertion step is
About the final phase winding, from the back side of the stator core, the final phase winding inserted in a line between the stationary blade and the moving blade is pushed up by a stripper and inserted into the final phase slot, and at least Before moving over the tip of the fixed blade held in place for some final phase windings, stop the stripper from rising, insert wedge paper into the final phase slot, and then retract the stripper and fixed blade. And
A part of the final phase winding is inserted into the final phase slot to form a final phase slot insertion portion, and the final phase surface side coil positioned in the first axial direction from the surface of the stator core A stator manufacturing method in which an end portion and a final phase back surface side coil end portion positioned in the second axial direction from the back surface are assembled in a symmetrical form. The manufacturing method of the motor containing the manufacturing method of the stator of any one of Claims 7-11.

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