JP2008125328A - Stator for three-phase motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator for a three-phase motor capable of making improvement in motor performance and size reduction of a coil end section compatible. <P>SOLUTION: The stator 1 for the three-phase motor has a stator core 2 having a plurality of slots, and coils 3U, V, W of U, V and W phases arranged in a distributed winding state, while leaving a space for a plurality of slots in a prescribed number of slots. On an axial end face 201 of the stator core 2, a bus panel 4 for turning, where three layers of panel layers 4A, B, C are laminated in an axial direction L of the stator core 2, is arranged facing bus panel for a crossover for connecting the three-phase coils 3U, V, W by each phase. A U-phase bus bar conductor 41U for forming the coils 3U, V, W for each phase, the V-phase bus bar conductor, and the W-phase bus bar conductor are provided in the three layers of panel layers 4A, B, C, while the bus bar conductors are dispersed in equal numbers. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a stator for a three-phase motor having a stator core having a plurality of slots and a three-phase coil arranged in a distributed winding state with a predetermined number of slots in the plurality of slots.

  A stator for a three-phase motor in which three-phase coils of a U-phase, a V-phase, and a W-phase are arranged on a stator core is formed by winding a copper wire having a circular cross-section, many of which are insulated and coated multiple times. Phase coils are used. On the other hand, there are various methods for assembling the coil to the stator core for the purpose of reducing the size of the coil end portion (portion in which a part of the coil protrudes from the axial end surface of the stator core) and simplifying the process of assembling the coil to the stator core. It is considered.

  For example, in a loop-shaped conductor forming a coil of each phase, a pair of first conductor portions opposed to each other are inserted and disposed in slots in the stator core, and the second conductor connecting both ends of the pair of first conductor portions. An assembling method is conceivable in which the portions are arranged opposite to the axial end faces on both sides of the stator core. As a stator of a motor using such a method, for example, there is one disclosed in Patent Document 1.

  In Patent Document 1, first conductor portions that form U-phase, V-phase, and W-phase coils are inserted into slots in a stator body portion (stator core), and both axial ends of the stator body portion are arranged. In addition, stator end plates provided with second and third conductor portions that respectively form U-phase, V-phase, and W-phase coils are disposed opposite to each other. Each stator end plate is laminated in three layers, and a pair of stator end plates closest to the axial end surface of the stator core are provided with second and third conductor portions that form a U-phase coil, A pair of stator end plates farthest from the axial end surface of the stator core are provided with second and third conductor portions for forming a W-phase coil, and a pair of stator end plates positioned between the V-phase coils. Second and third conductor portions to be formed are provided.

  However, in Patent Document 1 and the like, in the stator end plates laminated in three layers, a stator end plate that forms a U-phase coil, a stator end plate that forms a V-phase coil, and a W-phase Are separated and distributed to the stator end plates forming the coils. Therefore, the lengths of the U-phase coil, the V-phase coil, and the W-phase coil are different from each other, and the conductor resistance of each phase is different from each other. This is not sufficient for improving motor performance such as output torque. Further, by separating and distributing the coils of each phase into the three-layer stator end plates, it is not sufficient to reduce the size of the coil end portion, which is a portion that protrudes from the axial end surface of the stator core.

JP 2001-275288 A

  The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a stator for a three-phase motor that can achieve both improvement in motor performance and downsizing of a coil end portion.

The present invention includes a three-phase coil having a stator core having a plurality of slots and a U-phase, V-phase, and W-phase coils arranged in a distributed winding state with a predetermined number of slots in the plurality of slots. In the stator for motors,
On at least one of the axial end faces of the stator core, a turn bus panel formed by laminating a plurality of panel layers in the axial direction of the stator core is disposed oppositely.
The conductor portion that protrudes from the axial end surface of the stator core and is arranged in parallel to the panel layer in the coil of each phase is formed by a bus bar conductor for turn configuration provided in the panel layer,
The U-phase bus bar conductor, the V-phase bus bar conductor, and the W-phase bus bar conductor are dispersed in the plurality of panel layers, respectively, in a stator for a three-phase motor. Item 1).

  The stator for a three-phase motor according to the present invention has a three-phase coil disposed on the stator core, and the above-described turn bus panel is disposed opposite to at least one axial end surface of the stator core. The U-phase bus bar conductor, the V-phase bus bar conductor, and the W-phase bus bar conductor that respectively form the coils of each phase are distributed in a plurality of panel layers.

  Thereby, the plurality of three-phase bus bar conductors can be distributed and provided in the plurality of panel layers so that their lengths are as uniform as possible. Therefore, the lengths of the U-phase coil, the V-phase coil, and the W-phase coil can be made the same as much as possible, and the conductor resistance of each phase can be made as uniform as possible. Thereby, in a three-phase motor configured using the stator, motor performance such as output torque can be improved.

Further, by providing a plurality of three-phase bus bar conductors dispersed in a plurality of panel layers, it is possible to reduce the size of the coil end portion, which is a portion that protrudes from the axial end surface of the stator core.
Therefore, according to the stator for a three-phase motor of the present invention, both improvement in motor performance and downsizing of the coil end portion can be achieved.

  The state in which the bus bar conductors of each phase are distributed and provided in a plurality of panel layers means that the U phase bus bar conductor, the V phase bus bar conductor, and the W phase bus bar conductor are mixed in each panel layer. It means a state. In addition, the bus bar conductor is joined to an insertion conductor inserted in the slot to constitute a turn in each pole coil in each phase.

A preferred embodiment of the present invention described above will be described.
In the present invention, the three-phase coil is a single-pole coil formed by being turned a plurality of times, and the three-phase single-pole coil is connected to each phase outside the turn bus panel in the axial direction. It is preferable that a crossover bus panel provided with a crossover conductor for this purpose is disposed oppositely.
In this case, a continuous-pole coil in which single-phase coils of each phase are connected to each other can be formed by the connecting wire conductor. Moreover, after connecting the said three-phase coil for every phase with the conductor for connecting lines provided in the bus panel for connecting lines, a star connection or a delta connection etc. can be performed and it can be set as a stator.

Further, in the outer panel layer positioned on the outer side in the axial direction among the plurality of panel layers, a predetermined number of the plurality of bus bar conductors provided on the outer panel layer is set on the inner side in the axial direction with respect to the outer panel layer. It is preferable to join between the bus bar conductors provided in the inner panel layer located at the conductor portion drawn out from the axial end surface of the stator core.
In this case, the conductor portion to be joined to the bus bar conductor in the outer panel layer can be arranged using the space between the bus bar conductors in the inner panel layer. Thereby, the dimension of the radial direction in the coil end part by a some panel layer can be made small easily.

The panel layer in the turn bus panel is laminated in three layers, and the U-phase bus bar conductor, the V-phase bus bar conductor, and the W-phase bus bar conductor are each composed of the three panel layers. It is preferable to disperse and provide (claim 4).
In this case, the conductor resistances of the U-phase coil, the V-phase coil, and the W-phase coil can be made more uniform. Thereby, in a three-phase motor configured using the stator, motor performance such as output torque can be further improved. In this case, the coil end portion can be further reduced in size.
Further, the turn bus panel may be formed by stacking three separately formed panel layers, or may be formed by integrally forming three panel layers.

Preferably, the U-phase bus bar conductor, the V-phase bus bar conductor, and the W-phase bus bar conductor are respectively distributed in equal numbers in the three panel layers. ).
In this case, the conductor resistances of the U-phase coil, the V-phase coil, and the W-phase coil can be made more uniform.

  The three-layer panel layers are sequentially laminated as a first-stage panel layer, a second-stage panel layer, and a third-stage panel layer from the side close to the axial end surface of the stator core. In the layer, a predetermined number of the plurality of bus bar conductors provided in the third panel layer is provided between the bus bar conductors provided in the first panel layer and in the second panel layer. In addition, in the second-stage panel layer, a plurality of portions provided in the second-stage panel layer are joined to a conductor portion drawn from the axial end surface of the stator core through at least one of the bus bar conductors. It is preferable that a predetermined number of the bus bar conductors is joined to a conductor portion drawn from the axial end surface of the stator core through the bus bar conductors provided in the first-stage panel layer. Shii (claim 6).

  In this case, at least one of the space between the bus bar conductors in the first stage panel layer and the space between the bus bar conductors in the second stage panel layer is the conductor portion to be joined to the bus bar conductors in the third stage panel layer. Can be arranged using. Moreover, the conductor part joined with the bus-bar conductor in a 2nd-stage panel layer can be arrange | positioned using the space between the bus-bar conductors in a 1st-stage panel layer. Thereby, the dimension of the radial direction in the coil end part by a three-layer panel layer can be made small easily.

  Further, in each of the coils of each phase, the conductor portions drawn out from the axial end surface of the stator core to the panel layers, and the bus bar conductors in the panel layers are flat in the radial direction of the stator core, and The bus bar conductor in each panel layer is preferably provided by utilizing the space formed in each panel layer by flattening the conductor portion.

  In this case, the conductor portions and the bus bar conductors can be arranged more efficiently in each panel layer. Particularly, the dimension in the radial direction of the conductor portion and the bus bar conductor can be reduced, and the dimension in the radial direction at the coil end portion by the plurality of panel layers can be further reduced.

Of the three panel layers, one of the panel layers is a first panel layer, one of the panel layers different from the first panel layer is a second panel layer, and the remaining panel layers are third panel layers. The U-phase bus bar conductors, the V-phase bus bar conductors, and the W-phase bus bar conductors have a bus bar conductor constituting the first turn on the first panel layer. The bus bar conductors constituting the fourth turn are provided on the second panel layer, the bus bar conductors constituting the third turn are provided on the third panel layer, and the bus bar conductors constituting the fourth and subsequent turns are the same as described above. (Rotation) can be provided.
In this case, the three-phase bus bar conductors can be provided in an even number distributed in three panel layers in a state where the three-phase bus bar conductors are arranged in a space efficient manner.
In addition, each turn in the coil of each phase can be made into 1st turn, 2nd turn, 3rd turn, ... sequentially from the radial direction outer side of a stator core.

  Of the three panel layers, one of the panel layers is a first panel layer, one of the panel layers different from the first panel layer is a second panel layer, and the remaining panel layers are third panel layers. The bus bar conductors constituting the first turn are the first panel layer, the bus bar conductors constituting the second turn are the second panel layer, and the third U-phase bus bar conductors are the third. The bus bar conductors constituting the turn of the first and second turns are provided in the third panel layer, and the bus bar conductors constituting the fourth and subsequent turns are also provided in the same rotation as described above. The bus bar conductor constituting the first turn is formed on the second panel layer, and the bus bar conductor constituting the second turn is formed on the third panel layer. The bus bar conductor constituting the third turn. The bus bar conductors that are provided in the first panel layer and that constitute the fourth and subsequent turns are also provided in the same rotation as described above, and the plurality of bus bar conductors in the W phase constitute the first turn. The bus bar conductor is provided on the third panel layer, the bus bar conductor constituting the second turn is provided on the first panel layer, and the bus bar conductor constituting the third turn is provided on the second panel layer. The bus bar conductors constituting the second and subsequent turns can also be provided by the same rotation as above (claim 9).

In this case, the three-phase bus bar conductors can be distributed in equal lengths and numbers in the three panel layers in a state where the three-phase bus bar conductors are arranged in a space efficient manner. Further, in this case, the three panel layers can be shared by laminating the three panel layers with a phase difference of 120 ° (the formation state of the bus bar conductor provided in the three panel layers). Can be the same).
In addition, each turn in the coil of each phase can be made into 1st turn, 2nd turn, 3rd turn, ... sequentially from the radial direction outer side of a stator core.

  Of the three panel layers, one of the panel layers is a first panel layer, one of the panel layers different from the first panel layer is a second panel layer, and the remaining panel layers are third panel layers. The plurality of bus bar conductors of the U phase are adjacent to each other and the plurality of bus bar conductors constituting the first set of turns are adjacent to each other in the first panel layer and the second set of turns. Are provided on the second panel layer, and a plurality of bus bar conductors constituting a third set of turns adjacent to each other are provided on the third panel layer. The plurality of bus bar conductors are adjacent to each other, and the plurality of bus bar conductors constituting the first set of turns are adjacent to the second panel layer, and the plurality of bus bar conductors are adjacent to each other to constitute the second set of turns. Is the third panel In addition, a plurality of bus bar conductors constituting a third set of turns adjacent to each other are respectively provided in the first panel layer, and the plurality of W-phase bus bar conductors are adjacent to each other in the first set. A plurality of bus bar conductors constituting the turn of the second set of turns are adjacent to the third panel layer, and a plurality of bus bar conductors constituting the second set of turns are adjacent to the first panel layer, the third adjacent to the third panel layer. A plurality of bus bar conductors constituting a set of turns may be provided on the second panel layer, respectively.

In this case as well, the three-phase bus bar conductors can be provided in a three-layered panel layer with a uniform length and the number of the conductors in a state where the three-phase bus bar conductors are arranged in a space efficient manner. Also in this case, the three panel layers can be shared by stacking the three panel layers out of phase with each other by 120 degrees (the formation state of the bus bar conductor provided on the three panel layers). Can be the same).
If there are a plurality of bus bar conductors constituting the fourth and subsequent turns in the plurality of bus bar conductors of each phase, the plurality of bus bar conductors can also be provided by the same rotation as described above.
Further, the turns of each set in the coils of each phase can be sequentially set as the first set turn, the second set turn, the third set turn,... From the radial outside of the stator core. .

The turn bus panel is disposed opposite to the axial end surface on one side of the stator core, and the coil of each phase is formed by connecting a pair of insertion conductors inserted into the slot at one end. It can be formed using a U-shaped conductor portion and the bus bar conductor provided in the panel layer of the bus panel for turn.
In this case, the pair of insertion conductors in the U-shaped conductor portion are inserted and disposed in the slots of the stator core, and the ends of the U-shaped conductor portion are connected by the bus bar conductor, and the conductor is turned a plurality of times. A coil for each phase can be formed.

The turn bus panel is disposed opposite to the axial end surfaces on both sides of the stator core, and the coils of each phase are inserted through the slots, and the turn bus panel is the panel. It can also form using the said bus-bar conductor provided in the layer (Claim 12).
In this case, a pair of insertion conductors are inserted and disposed in the slots of the stator core, the ends of the pair of insertion conductors on both sides in the axial direction are connected by bus bar conductors, and the conductors are turned a plurality of times. A coil can be formed.

The cross-sectional area of the insertion conductor is the same as the cross-sectional area of the bus bar conductor, and the bus bar conductor preferably has a smaller thickness in the radial direction of the stator core than the insertion conductor ( Claim 13).
In this case, the cross-sectional area in each phase coil can be made uniform, and the loss which arises in a conductor can be reduced. In addition, the bus bar conductors of each phase may be formed in a thin flat shape in the radial direction of the stator core, and the coil end portion formed by the turn bus panel, the crossover bus panel, etc. may be reduced in the radial direction of the stator core. it can. Thereby, in the stator of the same size, the inner diameter of the through hole for arranging the rotor can be made as large as possible, and the motor performance can be further improved.

Further, the cross-sectional areas of the insertion conductors inserted and arranged in the same slot are the same, and the plurality of insertion conductors are located on the inner peripheral side of the stator core and are positioned on the outer peripheral side of the stator core. The width in the circumferential direction of the stator core is preferably smaller than that of the stator (claim 14).
In this case, in each slot, the width in the circumferential direction of the insertion conductor located on the inner circumference side of the stator core is made smaller than the insertion conductor located on the outer circumference side of the stator core, thereby arranging the rotor in the stator core. The inner diameter of the through hole can be increased as much as possible, and the motor performance can be further improved.

  The three panel layers are sequentially laminated as a first-stage panel layer, a second-stage panel layer, and a third-stage panel layer from the side close to the axial end surface of the stator core. In the layer, the first-stage connection position between the end of the bus bar conductor provided in the first-stage panel layer and the end of the insertion conductor, the end of the bus-bar conductor provided in the second-stage panel layer, and Corresponding to the second-stage connection position with the end of the insertion conductor and the third-stage connection position between the end of the bus bar conductor and the end of the insertion conductor provided in the third-stage panel layer, Communication ports that communicate with each other in the axial direction of the stator core are formed, and the end of the bus bar conductor provided in the first-stage panel layer extends from the slot to the communication port in the first-stage panel layer. And the insertion conductor in the state of being inserted up to The end portion of the bus bar conductor provided in the second-stage panel layer is inserted from the slot into the communication opening in the second-stage panel layer through the communication opening in the first-stage panel layer. The end portions of the bus bar conductors, which are joined to the insertion conductors in the state and provided in the third-stage panel layer, extend from the slot into the communication port in the first-stage panel layer and the communication in the second-stage panel layer. It can join with the said insertion conductor of the state penetrated to the said communicating port in the said 3rd step | paragraph panel layer through the inside of a mouth (Claim 15).

  In this case, the end of the bus bar conductor provided on each of the three panel layers and the end of the insertion conductor are joined to each other from the outside of the third panel layer after the three panel layers are stacked. It can be done in bulk through the mouth. Thereby, the said joining can be performed efficiently and the productivity of a stator can be improved.

  The three panel layers are sequentially laminated as a first-stage panel layer, a second-stage panel layer, and a third-stage panel layer from the side close to the axial end surface of the stator core. In the layer, the first-stage connection position between the end of the bus bar conductor provided in the first-stage panel layer and the end of the insertion conductor, the end of the bus-bar conductor provided in the second-stage panel layer, and Corresponding to the second-stage connection position with the end of the insertion conductor and the third-stage connection position between the end of the bus bar conductor and the end of the insertion conductor provided in the third-stage panel layer, Communication ports that communicate with each other in the axial direction of the stator core are formed, and the end portion of the bus bar conductor provided in the first panel layer is bent outward in the axial direction of the stator core. Pull out to at least the third panel layer A first-stage lead-out end portion is formed, and the first-stage lead-out end portion passes through the inside of the communication port in the first-stage panel layer and the inside of the communication port in the second-stage panel layer from within the slot. It joins with the said insertion conductor in the state penetrated in the said communication port in the 3rd step panel layer, and it is bent toward the axial direction outer side of the said stator core at the edge part of the said bus-bar conductor provided in the said 2nd step panel layer A second-stage drawer end extending to at least the third-stage panel layer is formed, and the second-stage drawer end extends from the slot into the communication port in the first-stage panel layer and the above-mentioned It can also be joined to the insertion conductor in a state of passing through the communication port in the second-stage panel layer and into the communication port in the third-stage panel layer.

  Also in this case, the end of the bus bar conductor and the end of the insertion conductor provided in each of the three panel layers are joined together from the third panel layer after the three panel layers are stacked. be able to. Further, in this case, the joining can be performed at an outer position in the axial direction of the stator core than the third-stage panel layer or the third-stage panel layer. Thereby, the said joining can be performed more efficiently and the productivity of a stator can be improved further.

Embodiments of the stator for a three-phase motor according to the present invention will be described below with reference to the drawings.
(Example 1)
As shown in FIGS. 7, 9, and 10, the stator 1 for the three-phase motor of this example has a stator core 2 having a plurality of slots 22 and distributed winding with a predetermined number of slots in the plurality of slots 22. It has U-phase, V-phase, and W-phase coils 3U, V, and W arranged in a state. On the end surface 201 in the axial direction of the stator core 2, a turn bus panel 4 formed by laminating three panel layers 4 </ b> A, B, and C in the axial direction L of the stator core 2 is disposed to face.
In the turn bus panel 4, the three panel layers 4 </ b> A, B, and C are arranged from the side close to the axial end surface 201 of the stator core 2, the first-stage panel layer 4 </ b> A, the second-stage panel layer 4 </ b> B, and the third-stage panel layer. 4C is sequentially laminated.

In the coils 3U, V, and W of each phase, the conductor portions that protrude from the axial end surface 201 of the stator core 2 and are arranged in parallel to the panel layers 4A, B, and C are for the turn configuration provided in the panel layers 4A, B, and C. The bus bar conductor 41 is formed.
In the third-stage panel layer 4C, a predetermined number of the plurality of bus bar conductors 41 provided in the third-stage panel layer 4C is between the bus bar conductors 41 provided in the first-stage panel layer 4A and the second-stage panel layer 4C. It is joined to a conductor portion drawn from the axial end surface 201 of the stator core 2 through at least one of the bus bar conductors 41 provided on the panel layer 4B. In the second-stage panel layer 4B, a predetermined number of the plurality of bus bar conductors 41 provided in the second-stage panel layer 4B passes between the bus bar conductors 41 provided in the first-stage panel layer 4A. And a conductor portion drawn from the axial end surface 201 of the stator core 2.

1 to 6, the U-phase bus bar conductor 41U, the V-phase bus bar conductor 41V, and the W-phase bus bar conductor 41W are arranged in equal numbers on the three panel layers 4A, B, and C, respectively. It is distributed.
In addition, the three-phase coils 3U, V, and W of the present example constitute a single-pole coil that is formed by turning a plurality of times. As shown in FIGS. 8 and 10, three-phase single-pole coils (in this example, simply referred to as coils) 3 U, V, and W are arranged outside the axial direction L of the turn bus panel 4 in each phase. Crossover bus panels 5 provided with crossover conductors 51U, V, and W to be connected to each other are arranged to face each other.
In the stator 1 of this example, the coils (single pole coils) 3U, V, and W of each phase are connected to each other by the connecting conductors 51U, V, and W to form a continuous coil.

  In this example, FIGS. 1 and 2 show an overall view and a partially enlarged view of the first-stage panel layer 4A, respectively, and FIGS. 3 and 4 show an overall view and a partially enlarged view of the second-stage panel layer 4B, respectively. FIGS. 5 and 6 show an overall view and a partially enlarged view of the third-stage panel layer 4C, respectively. FIG. 7 shows a partially enlarged view of the stator core 2, and FIG. 8 shows an enlarged view of the crossover bus panel 5. FIG. 9 schematically shows an arrangement state of the U-phase coil 3U in the stator core 2 (the arrangement state is the same for the V-phase and W-phase coils 3V and W).

Hereinafter, the stator 1 for the three-phase motor of this example will be described in detail with reference to FIGS.
The stator 1 for a three-phase motor of this example is used for a three-phase motor that can be used for a hybrid vehicle, an electric vehicle, or the like. The three-phase motor can also be used as a motor generator or a generator.
As shown in FIGS. 7 and 10, the stator core 2 is formed by laminating electromagnetic steel plates 23 made of a magnetic material in the axial direction L, and a through hole for rotatably arranging the rotor in the axial direction L. 21. In the stator core 2, a plurality of slots 22 are formed radially from the inner wall of the through hole 21 outward in the radial direction R. Each slot 22 is formed so as to penetrate in the axial direction L, and has a shape whose width in the circumferential direction C increases as it goes outward in the radial direction R.

  As shown in FIGS. 9 and 10, in the stator 1 of this example, the turn bus panel 4 and the crossover bus panel 5 are disposed to face the axial end surface 201 on one side of the stator core 2. In each phase coil 3 </ b> U, V, W, a conductor portion protruding from the axial end surface 201 on one side of the stator core 2 is formed by a bus bar conductor 41.

As shown in FIG. 12, each phase coil 3 </ b> U, V, W has a U-shaped conductor portion 310 for each phase formed by connecting a pair of insertion conductors 32 inserted and disposed in the slot 22 with a connection conductor 33. And bus bar conductors 41U, V, and W of each phase provided in the panel layers 4A, B, and C, respectively. Then, the pair of insertion conductors 32 in the U-shaped conductor portion 310 are inserted and disposed in the slots 22 of the stator core 2, the ends of the U-shaped conductor portion 310 are connected by the bus bar conductor 41, and the conductor is turned a plurality of times. Thus, the coils 3U, V, and W of each phase can be formed.
Further, the turn bus panel 4 and the crossover bus panel 5 have a ring shape having through holes corresponding to the through holes 21 of the stator core 2.

  Although illustration is omitted, the turn bus panel 4 and the crossover bus panel 5 are arranged to face the axial end surfaces 201 and 202 on both sides of the stator core 2, and the coils 3U, V, and W of each phase are slots. It is also possible to use the insertion conductors 32 of the respective phases that are inserted and arranged in the 22 and the bus bar conductors 41U, V, and W of the respective phases provided in the panel layers 4A, B, and C. In this case, the pair of insertion conductors 32 are inserted into the slots 22 of the stator core 2, the ends of the pair of insertion conductors 32 in the axial direction are connected by the bus bar conductors 41, and the conductors are turned a plurality of times. The coils 3U, V, W of each phase can be formed.

As shown in FIG. 11, in each slot 22, a plurality of insertion conductors 32 are inserted and arranged in a state of being arranged in the radial direction R. The coils 3U, V, and W of each phase are formed by square wires that have an insulating coating and have a substantially square cross section. Insulating paper 241 is arranged on the inner wall of each slot 22, and a plurality of insertion conductors 32 inserted and arranged in the slot 22 are bundled by an insulating film 242.
Further, in order to minimize the loss generated in the coils, the coils 3U, V, W of each phase are formed with a constant cross-sectional area. In each phase of the coils 3U, V, and W, the cross-sectional areas of the insertion conductor 32, the connection conductor 33, and the bus bar conductor 41 are the same, and a plurality of insertion conductors 32 that are inserted in the same slot 22 are provided. The cross-sectional areas of each other are the same.

Further, as shown in the figure, in order to improve the occupied area of the conductor in the slot 22, the plurality of insertion conductors 32 are arranged on the inner peripheral side of the stator core 2 and on the outer peripheral side of the stator core 2. In comparison, the width c1 of the stator core 2 in the circumferential direction C is small and the thickness r1 of the stator core 2 in the radial direction R is large.
Further, in this example, the plurality of insertion conductors 32 inserted and arranged in the same slot 22 have the smallest width c1 in the circumferential direction C and the thickness r1 in the radial direction R although they are located on the innermost side of the stator core 2. Although it is the largest, the width c1 in the circumferential direction C is the largest, but the thickness r1 in the radial direction R is the smallest, although it is located on the outermost peripheral side of the stator core 2. Further, the plurality of insertion conductors 32 inserted and arranged in the same slot 22 have a larger width c1 in the circumferential direction C and a smaller thickness r1 in the radial direction R as they are located on the outer peripheral side.

  As shown in FIGS. 1 to 6, the end portions of the insertion conductors 32 led out from the axial end surface 201 of the stator core 2 to the respective panel layers 4A, B, C in the coils 3U, V, W of each phase, and The bus bar conductors 41 in the panel layers 4A, 4B, and 4C are flattened in the radial direction R of the stator core 2 (see FIG. 23 described later). And the bus-bar conductor 41 in each panel layer 4A, B, C is provided using the space formed in each panel layer 4A, B, C by making the edge part of the said insertion conductor 32 flat.

  Further, as shown in FIG. 12, in the coils 3U, V, W of each phase, the connecting conductor 33 and the bus bar conductor 41 have a thickness r1 in the radial direction R of the stator core 2 smaller than that of the insertion conductor 32. Accordingly, the connecting conductor 33 and the bus bar conductor 41 are formed in a thin flat shape in the radial direction R of the stator core 2, and the coil end portion 30, the turn bus panel 4 and the crossover bus panel 5 formed by the connecting conductor 33. The coil end portion 30 formed by the above or the like can be reduced in the radial direction R of the stator core 2.

  As shown in FIG. 7, the number of slots 22 in the stator core 2 is a multiple of six. The number of slots of the stator core 2 in this example is 16 slots for the U phase, the V phase, and the W phase, for a total of 48 slots. Further, eight coils 3U, V, and W for each phase are formed, and two sets of quadruple coils in which the four coils 3U, V, and W for each phase are connected by the bus panel 5 for connecting wires. It is formed one by one. In the stator 1, one end of the quadruple coil of each phase is bound to form a neutral point, and two sets of star connection coils having the neutral point are formed.

  Further, in the stator core 2, six types of slots 22 through which a pair of insertion conductors 32 that respectively form the three-phase coils 3U, V, and W are inserted are adjacently formed a plurality of times. That is, in the stator core 2, eight slot sets are formed by using six types of slots 22 as slot sets.

As shown in FIG. 7, six types of adjacent slots 22 (each slot group) are arranged in order from one circumferential side C1 of the stator core 2 to one side U-phase slot U2, the other side U-phase slot U1, and one side V. The phase slot V2, the other-side V-phase slot V1, the one-side W-phase slot W2, and the other-side W-phase slot W1 are formed.
The insertion conductor 32U on the other circumferential side C2 of the first U-phase coil 3U is inserted and disposed in the one-side U-phase slot U2. Further, in the other U-phase slot U1, there is an insertion conductor 32U on one circumferential side C1 of the second U-phase coil 3U adjacent to the other circumferential side C2 of the first U-phase coil 3U. It is inserted through.

An insertion conductor 32V on the other circumferential side C2 of the first V-phase coil 3V is inserted into the one-side V-phase slot V2. Further, in the other-side V-phase slot V1, there is an insertion conductor 32V on one circumferential side C1 of the second V-phase coil 3V adjacent to the other circumferential side C2 of the first V-phase coil 3V. It is inserted through.
An insertion conductor 32W on the other side C2 in the circumferential direction of the first W-phase coil 3W is inserted into the one-side W-phase slot W2. Further, in the other-side W-phase slot W1, there is an insertion conductor 32W on one circumferential side C1 of the second W-phase coil 3W adjacent to the other circumferential side C2 of the first W-phase coil 3W. It is inserted through.

As shown in FIG. 9, the three-phase coils 3U, V, and W of this example are formed by turning a conductor with insulation coating nine times, and the coils 3U, V, and W of each phase are formed in nine loops. The conductors 31U, V, and W are connected to each other.
Further, as shown in FIG. 11, ten insertion conductors 32 are inserted and arranged in the slots 22 side by side in the radial direction R of the stator core 2.

In the turn bus panel 4, each of the panel layers 4A, B, and C is formed with a plurality of U-phase bus bar conductors 41U, V-phase bus bar conductors 41V, and W-phase bus bar conductors 41W.
As shown in FIGS. 2, 4, 6, and 7, the U-phase bus bar conductor 41U is inserted into the other-side U-phase slot U1 in the first slot set to form the U-phase coil 3U. The insertion conductor 32U on the other circumferential side C2 is inserted and disposed in the slot U2 for one side U-phase in the second slot set, with the four insertion slots 32U on the circumferential one side C1 arranged and the four slots 22. And are formed so as to be connected to each other.

  In each of the panel layers 4A, B, and C, the circumferential conductor one side C1 insertion conductor 32U and the one side U phase slot U2 are inserted and arranged in the other side U phase slot U1, respectively. Eight sets of three U-phase bus bar conductors 41U that connect the insertion conductor 32U on the other circumferential side C2 are formed.

As shown in FIGS. 2, 4, 6, and 7, the V-phase bus bar conductor 41V is inserted into the other-side V-phase slot V1 in the first slot set in order to form the V-phase coil 3V. The insertion conductor 32V on the other circumferential side C2 is arranged to be inserted into the one-side V-phase slot V2 in the second slot set with the insertion conductor 32V on the circumferential one side C1 arranged and the four slots 22 therebetween. And are formed so as to be connected to each other.
In each panel layer 4A, B, and C, the insertion conductor 32V on one circumferential side C1 inserted in the other-side V-phase slot V1 and the one-side V-phase slot V2 are inserted and arranged. Eight sets of three V-phase bus bar conductors 41V that connect the insertion conductor 32V on the other circumferential side C2 are formed.

As shown in FIGS. 2, 4, 6, and 7, the W-phase bus bar conductor 41 </ b> W is inserted into the other W-phase slot W <b> 1 in the first slot set to form the W-phase coil 3 </ b> W. The circumferential conductor one side C1 insertion conductor 32W and the four slots 22 are opened, and the circumferential other side C2 insertion conductor 32W is inserted into the one side W-phase slot W2 in the second slot set. And are formed so as to be connected to each other.
In each panel layer 4A, B, and C, the insertion conductor 32W on one circumferential side C1 inserted in the other-side W-phase slot W1 and the one-side W-phase slot W2 are inserted and arranged. Eight sets of three W-phase bus bar conductors 41W that connect the insertion conductor 32W on the other circumferential side C2 are formed.

As shown in FIGS. 10 and 12, in the pair of insertion conductors 32 in the U-shaped conductor portion 310, the end portion on the side connected to the bus bar conductor 41 protrudes from the axial end surface 201 on one side of the stator core 2. The portion 321 is bent in a predetermined shape up to a position where the straight portion 322 inserted into the slot 22 is joined to the bus bar conductor 41 provided in each of the panel layers 4A, 4B, and 4C.
Further, in the pair of insertion conductors 32 in the U-shaped conductor portion 310, the protruding portion 321 that protrudes from the axial end surface 202 on the other side of the stator core 2 is also in the radial direction R of the coil end portion 30 by the plurality of connecting conductors 33. It is bent into a predetermined shape to reduce the dimensions.

  As shown in FIGS. 2, 4, and 6, in each panel layer 4 </ b> A, B, C, the U-shaped conductor portion of each phase is located at a position corresponding to both ends of the bus bar conductors 41 </ b> U, V, W of each phase An insertion port 43 for inserting and arranging the ends of the pair of insertion conductors 32 in 310 is formed. And the edge part of a pair of insertion conductor 32 in the U-shaped conductor part 310 of each phase faces the both ends of the bus-bar conductors 41U, V, and W of each phase by inserting and arranging in the insertion port 43, The insertion port 43 is joined to both end portions of the bus bar conductors 41U, V, W of each phase.

As shown in FIG. 2, in the first-stage panel layer 4A, the ends of the pair of insertion conductors 32 in the U-shaped conductor part 310 of each phase are connected to the second-stage panel layer 4B or the third-stage panel layer 4C. A through-opening 44 for penetrating up to is formed. Further, as shown in FIG. 4, in the second-stage panel layer 4B, through-holes for penetrating the ends of the pair of insertion conductors 32 in the U-shaped conductor part 310 of each phase to the third-stage panel layer 4C. 44 is formed.
The end portions of the insertion conductors 32U, V, and W of each phase drawn out to the second-stage panel layer 4B pass through the through-holes 44 in the first-stage panel layer 4A and are inserted into the insertion holes in the second-stage panel layer 4B. 43, the ends of the bus bar conductors 41U, V, W of each phase are joined. Further, the end portions of the insertion conductors 32U, V, and W of each phase drawn out to the third-stage panel layer 4C pass through the through-hole 44 in the first-stage panel layer 4A and the through-hole 44 in the second-stage panel layer 4B. In addition, the ends of the bus bar conductors 41U, V, and W of each phase are joined at the insertion port 43 in the third-stage panel layer 4C.

Further, as shown in FIG. 6, in the third-stage panel layer 4 </ b> C, through-holes 44 for penetrating both end portions of the coils 3 </ b> U, V, and W of each phase to the above-described crossover bus panel 5 are formed. is there.
As shown in FIG. 8, both ends of the coils 3U, V, and W of each phase drawn out to the crossover bus panel 5 are the first panel layer 4A, the second panel layer 4B, and the third panel layer 4C. Are connected to the end portions of the crossover conductors 51U, V, and W provided in the crossover bus panel 5.

  Further, the turn bus panel 4 and the crossover bus panel 5 of this example can be assembled as follows. That is, the first-stage panel layer 4A is disposed opposite to the axial end surface 201 on one side of the stator core 2, and the bus bar conductors 41U, V, and W of each phase are joined in the first-stage panel layer 4A. The second-stage panel layer 4B is laminated on the first-stage panel layer 4A, and the bus bar conductors 41U, V, and W of each phase are joined in the second-stage panel layer 4B. Next, the third-stage panel layer 4C is laminated on the second-stage panel layer 4B, and the bus-bar conductors 41U, V, and W of each phase are joined in the third-stage panel layer 4C, and then the third-stage panel layer The crossover bus panel 5 is disposed opposite to 4C, and the crossover conductors 51U, V, and W can be joined in the crossover bus panel 5.

In this example, the loop-shaped conductors 31U, V, and W constituting the coils 3U, V, and W of each phase constitute the first turn that is located on the outermost side of the stator core 2, and the inner circumference of the stator core 2 It is assumed that the second and subsequent turns are formed sequentially toward the side.
2, 4 and 6 are enlarged views showing the arrangement state of the bus bar conductors 41U, V and W in the panel layers 4A, 4B and 4C.

  As shown in the figures, the U-phase bus bar conductors 41U, the V-phase bus bar conductors 41V, and the W-phase bus bar conductors 41W have the first bus bar conductors 41 constituting the first turn. The bus bar conductor 41 that is provided in the third-stage panel layer 4C as the panel layer and that constitutes the second turn is provided in the second-stage panel layer 4B as the second panel layer, and constitutes the third turn. Bus bar conductors 41 are provided in the first panel layer 4A as the third panel layer. Further, the bus bar conductors 41 constituting the fourth and subsequent turns are also sequentially provided in the third-stage panel layer 4C, the second-stage panel layer 4B, and the first-stage panel layer 4A in the same rotation as described above.

Thus, as shown in FIG. 6, the third-stage panel layer 4C has three-phase bus bar conductors 41U, V, W (1), (4) constituting the first turn, the fourth turn, and the seventh turn. ), (7) are provided. As shown in FIG. 4, the second panel layer 4B has three-phase bus bar conductors 41U, V constituting the second turn, the fifth turn, and the eighth turn. , W (2), (5), (8) are provided, and as shown in FIG. 2, the first panel layer 4A constitutes the third turn, the sixth turn and the ninth turn. Three-phase bus bar conductors 41U, V, W (3), (6), (9) are provided.
Note that the bus bar conductors 41U, V, and W of each phase may be provided by being dispersed in a pattern different from this example with respect to the three panel layers 4A, B, and C.

  In the stator 1 for the three-phase motor of this example, as described above, the V-phase bus bar conductor 41V and the W-phase bus bar conductor 41W are formed in a uniform cross-sectional area, and each of the three panel layers 4A, B, In C, it was distributed in an equal number. Accordingly, the lengths of the U-phase coil 3U, the V-phase coil 3V, and the W-phase coil 3W can be made uniform, and the conductor resistance for each phase can be made uniform. Thereby, in the three-phase motor configured using the stator 1, motor performance such as output torque can be improved.

  Further, by providing a plurality of three-phase bus bar conductors 41U, V, W in an equal number distributed in the three panel layers 4A, B, C, the turn bus panel 4 and the crossover bus panel 5 are provided. The coil end portion 30 (the portion disposed so as to protrude from the axial end surfaces 201 and 202 of the stator core 2) formed by the above can be reduced in size. In particular, since the coil end portion 30 can be reduced in the radial direction R of the stator core 2, in the stator 1 of the same size, the inner diameter of the through hole 21 for arranging the rotor can be increased as much as possible, and the motor performance can be improved. This can be further improved.

  Further, in this example, the insertion conductor 32 as a conductor portion to be joined to the bus bar conductor 41 in the third-stage panel layer 4C is used as the space between the bus bar conductors 41 in the first-stage panel layer 4A and the second-stage panel layer. It can arrange | position using at least one of the space between the bus-bar conductors 41 in 4B. Further, the insertion conductor 32 as a conductor portion to be joined to the bus bar conductor 41 in the second-stage panel layer 4B can be arranged using a space between the bus bar conductors 41 in the first-stage panel layer 4A. Thereby, the dimension of the radial direction R in the coil end part 30 by the three panel layers 4A, B, and C can be easily reduced.

  Therefore, according to the stator 1 for a three-phase motor of this example, both improvement in motor performance and downsizing of the coil end portion 30 can be achieved.

(Example 2)
In this example, as shown in FIGS. 13 to 23, the joining of the bus bar conductors 41U, V, and W of each phase in the first panel panel 4A, the second panel layer 4B, and the third panel layer 4C is simple. We are doing something to do.
That is, the turn bus panel 4 of this example has three panel layers 4A, B, C from the outer surface in the axial direction L of the third-stage panel layer 4C in the three panel layers 4A, B, C. The bus bar conductors 41U, V, and W of each phase in FIG.

  More specifically, as shown in FIG. 23, in the three panel layers 4A, B, and C of this example, the end of the bus bar conductor 41 and the end of the insertion conductor 32 provided in the first-stage panel layer 4A. And the first-stage connection position 401, the second-stage connection position 402 between the end of the bus bar conductor 41 provided in the first-stage panel layer 4B and the end of the insertion conductor 32, and the third-stage panel layer 4C. Corresponding to the third-stage connection position 403 between the end portion of the bus bar conductor 41 and the end portion of the insertion conductor 32, communication ports 45 communicating with each other in the axial direction L of the stator core 2 are formed. In other words, in the second-stage panel layer 4B and the third-stage panel layer 4C of this example, the insertion opening 43 is located at a position corresponding to the insertion opening 43 in the first-stage panel layer 4A shown in the first embodiment. The communication port 45 which continues to is formed.

  In this example, the ends of the bus bar conductors 41U, V, W of each phase provided in the first-stage panel layer 4A are inserted from the slots 22 of the stator core 2 to the communication ports 45 in the first-stage panel layer 4A. It is joined to the insertion conductors 32U, V, W of each phase in the state. Further, the end portions of the bus bar conductors 41U, V, and W of each phase provided in the second-stage panel layer 4B are connected to the second-stage via the inside of the communication port 45 in the first-stage panel layer 4A from the slot 22 of the stator core 2. It is joined to the insertion conductors 32U, V, W of each phase in a state of being inserted into the communication port 45 in the panel layer 4B. Further, the end portions of the bus bar conductors 41U, V, W of each phase provided in the third-stage panel layer 4C extend from the slots 22 of the stator core 2 into the communication port 45 in the first-stage panel layer 4A and the second-stage panel layer. It is joined to the insertion conductors 32U, V, and W of each phase in a state of being inserted into the communication port 45 in the third-stage panel layer 4C through the communication port 45 in 4B.

Further, as shown in FIG. 23, the turn bus panel 4 used in this example is formed by integrally molding three panel layers 4A, B, and C. That is, the turn bus panel 4 of this example is configured such that the conductors constituting the bus bar conductors 41U, V, and W of each phase are processed into a predetermined shape and arranged at predetermined positions, and then the gaps between the bus bar conductors 41 are separated. Insulating material 42 can be poured into the three panel layers 4A, 4B, and 4C to be integrally formed.
The end of the bus bar conductor 41 and the end of the insertion conductor 32 are joined by melting the solder coated on at least one surface of the end of the bus bar conductor 41 or the end of the insertion conductor 32 with a laser beam. It can be carried out.

  FIGS. 13 and 14 show an overall view and a partially enlarged view of the first-stage panel layer 4A of this example, respectively. FIGS. 16 and 17 show an overall view of the second-stage panel layer 4B of this example. And FIG. 19 and FIG. 20 show an overall view and a partial enlarged view of the third panel layer 4C of this example, respectively. FIG. 22 shows an overall view of the crossover bus panel 5 of this example.

  FIGS. 15, 18, and 21 are diagrams schematically showing the arrangement state of the bus bar conductors 41U, V, and W in the panel layers 4A, 4B, and 4C. The numbers in the figure indicate the ten insertion conductors 32U, V, and W inserted and arranged in each slot 22, and numbers are assigned in order from the outer peripheral side of the stator core 2. For example, the bus bar conductor 41 constituting the first turn is spanned between 1 and 2, and the bus bar conductor 41 constituting the second turn is spanned between 2 and 3.

  Also in this example, the U-phase bus bar conductors 41U, the V-phase bus bar conductors 41V, and the W-phase bus bar conductors 41W are composed of the bus bars constituting the first turn as shown in FIGS. The conductor 41 is provided in the third-stage panel layer 4C as the first panel layer. As shown in FIGS. 17 and 18, the bus bar conductor 41 constituting the second turn is the second-stage panel as the second panel layer. As shown in FIGS. 20 and 21, the bus bar conductors 41 constituting the third turn are provided in the first-stage panel layer 4 </ b> A as the third panel layer. Further, the bus bar conductors 41 constituting the fourth and subsequent turns are also sequentially provided in the third-stage panel layer 4C, the second-stage panel layer 4B, and the first-stage panel layer 4A in the same rotation as described above.

Also in this example, other configurations such as the arrangement pattern of the bus bar conductors 41U, V, and W of the respective phases in the three panel layers 4A, B, and C are the same as those in the first embodiment.
In this example, the connection between the end portions of the bus bar conductors 41U, V, and W of each phase provided in the three panel layers 4A, B, and C and the end portions of the insertion conductors 32U, V, and W of each phase is as follows. The three-layer panel layers 4A, B, and C formed integrally can be collectively performed from the outer surface in the axial direction L of the third-stage panel layer 4C. Thereby, the bus bar conductors 41U, V, and W of each phase can be efficiently joined, and the productivity of the stator 1 can be improved. In this example as well, other functions and effects similar to those of the first embodiment can be obtained.

(Example 3)
In this example, as shown in FIGS. 24 to 30, a device for making the three panel layers 4 </ b> A, B, and C common is used.
That is, the turn bus panel 4 of the present example has a structure in which three panel layers having the same shape can be formed by shifting the phase by 120 ° from each other, and three steps in the three panel layers 4A, B, and C. From the outer surface in the axial direction L of the eye panel layer 4C, it has a structure capable of collectively joining the bus bar conductors 41U, V, W of each phase in the three panel layers 4A, B, C. ing.

  In this example, FIG. 24 shows an overall view of the common panel layers 4A, B, and C, FIG. 25 shows a partially enlarged view of the first-stage panel layer 4A, and FIG. 27 shows the second-stage panel layer. FIG. 29 shows a partially enlarged view of 4B, and FIG. 29 shows a partially enlarged view of the third-stage panel layer 4C. FIGS. 26, 28, and 30 are diagrams schematically showing the arrangement state of the bus bar conductors 41U, V, and W in the panel layers 4A, B, and C, respectively.

Also in this example, the loop-shaped conductors 31U, V, and W constituting the coils 3U, V, and W of each phase constitute the first turn that is located on the outermost peripheral side of the stator core 2, and the inside of the stator core 2 It is assumed that the second and subsequent turns are sequentially formed toward the circumferential side.
As shown in FIGS. 25, 27, and 29, the plurality of U-phase bus bar conductors 41U includes a first panel layer 4A in which the bus bar conductor 41U (1) constituting the first turn is the first panel layer. The bus bar conductor 41U (2) constituting the second turn is provided in the second panel layer 4B as the second panel layer, and the bus bar conductor 41U (3) constituting the third turn is provided. The third panel layer 4C as the third panel layer is provided. Also, the bus bar conductors 41U (4) to (9) constituting the fourth and subsequent turns are sequentially rotated to the first-stage panel layer 4A, the second-stage panel layer 4B, and the third-stage panel layer 4C by the same rotation as described above. It is provided.

  As shown in FIGS. 25, 27, and 29, the plurality of V-phase bus bar conductors 41V are provided with the bus bar conductor 41V (1) constituting the first turn in the second panel layer 4B. A bus bar conductor 41V (2) constituting the third turn is provided in the third-stage panel layer 4C, and a bus bar conductor 41V (3) constituting the third turn is provided in the first-stage panel layer 4A. Also, the bus bar conductors 41V (4) to (9) constituting the fourth and subsequent turns are sequentially rotated to the second panel layer 4B, the third panel layer 4C, and the first panel layer 4A in the same rotation as described above. It is provided.

  As shown in FIGS. 25, 27, and 29, the plurality of W-phase bus bar conductors 41W are provided with the bus bar conductor 41W (1) constituting the first turn in the third panel layer 4C. A bus bar conductor 41W (2) constituting the third turn is provided in the first-stage panel layer 4A, and a bus bar conductor 41W (3) constituting the third turn is provided in the second-stage panel layer 4B. Further, the bus bar conductors 41W (4) to (9) constituting the fourth and subsequent turns are also sequentially rotated to the third panel layer 4C, the first panel layer 4A, and the second panel layer 4B by the same rotation as described above. It is provided.

Thus, in this example, as shown in FIGS. 25 and 26, the first-stage panel layer 4A has a U-phase bus bar conductor 41U (1) constituting the first turn, the fourth turn, and the seventh turn. ), (4), (7), V-phase bus bar conductors 41V (3), (6), (9) constituting the third turn, the sixth turn and the ninth turn, W-phase bus bar conductors 41W (2), (5), and (8) constituting the turn, the fifth turn, and the eighth turn are provided.
As shown in FIGS. 27 and 28, the second-stage panel layer 4B has U-phase bus bar conductors 41U (2), (5) constituting the second turn, the fifth turn and the eighth turn. , (8), V-phase bus bar conductor 41V (1), (4), (7) constituting the first turn, the fourth turn and the seventh turn, the third turn, the sixth turn W-phase bus bar conductors 41W (3), (6), and (9) constituting the turn and the ninth turn are provided.

29 and 30, the third-stage panel layer 4C has U-phase bus bar conductors 41U (3), (6) constituting the third turn, the sixth turn, and the ninth turn. , (9), the V-phase bus bar conductor 41V (2), (5), (8) constituting the second turn, the fifth turn and the eighth turn, the first turn, the fourth turn W-phase bus bar conductors 41W (1), (4), and (7) constituting the turn and the seventh turn are provided.
Note that the bus bar conductors 41U, V, and W of each phase may be provided by being dispersed in a pattern different from this example with respect to the three panel layers 4A, B, and C.

Also in this example, other configurations are the same as those in the second embodiment.
In this example, three panel layers 4A, 4B, and 4C can be formed by laminating panel layers having the same shape with a phase difference of 120 ° from each other. Thereby, the formation state (length and the number) of the bus bar conductors 41 provided on the three panel layers 4A, B, and C can be made the same, and the structure of the turn bus panel 4 can be simplified. In this example as well, other functions and effects similar to those of the second embodiment can be obtained.

Example 4
Also in this example, as shown in FIGS. 31 to 38, a device for making the three panel layers 4A, B, and C common is used.
That is, the turn bus panel 4 of the present example also has a structure in which three panel layers having the same shape can be formed by shifting the phase by 120 ° from each other, and three stages in the three panel layers 4A, B, and C. From the outer surface in the axial direction L of the eye panel layer 4C, it has a structure capable of collectively joining the bus bar conductors 41U, V, W of each phase in the three panel layers 4A, B, C. ing.

  In this example, FIG. 31 shows an overall view of the common panel layers 4A, B, and C, FIG. 32 shows a partially enlarged view of the first-stage panel layer 4A, and FIG. 34 shows the second-stage panel layer. 4B shows a partially enlarged view of FIG. 4 and FIG. 36 shows a partially enlarged view of the third-stage panel layer 4C. FIGS. 33, 35, and 37 are diagrams schematically showing the arrangement state of the bus bar conductors 41U, V, and W in the panel layers 4A, B, and C, respectively.

In this example, the loop-shaped conductors 31U, V, and W constituting the coils 3U, V, and W of each phase constitute the first turn that is located on the outermost side of the stator core 2, and the inner circumference of the stator core 2 It is assumed that the second and subsequent turns are formed sequentially toward the side.
As shown in FIGS. 32, 34, and 36, the plurality of U-phase bus bar conductors 41U are adjacent to each other, and the plurality of bus bar conductors 41U constituting the first set of turns serve as the first panel layer. A plurality of bus bar conductors 41U, which are provided in the first stage panel layer 4A and constitute a second set of turns adjacent to each other, are provided in the second stage panel layer 4B as the second panel layer and adjacent to each other. Thus, a plurality of bus bar conductors 41U constituting the third set of turns are provided in the third-stage panel layer 4C as the third panel layer.

The plurality of bus bar conductors 41V in the V phase have a plurality of bus bar conductors 41V that are adjacent to each other and form a first set of turns, provided in the second-stage panel layer 4B. A plurality of bus bar conductors 41V constituting a set of turns are provided in the third-stage panel layer 4C, and a plurality of bus bar conductors 41V constituting a third set of turns adjacent to each other are provided in the first-stage panel layer 4A. Is provided.
The plurality of W-phase bus bar conductors 41W are adjacent to each other, and a plurality of bus bar conductors 41W constituting the first set of turns are provided in the third-stage panel layer 4C. A plurality of bus bar conductors 41W constituting a set of turns are provided in the first-stage panel layer 4A, and a plurality of bus bar conductors 41W constituting a third set of turns adjacent to each other are provided in the second-stage panel layer 4B. Is provided.

In this example, the number of bus bar conductors 41 constituting each set of turns is three.
In this example, as shown in FIGS. 32 and 33, the first-stage panel layer 4A has U-phase bus bar conductors 41U (1), (2), (3) constituting the first set of turns. ), V-phase bus bar conductors 41V (4), (5), (6) constituting the second set of turns, and W-phase bus bar conductors 41W (7) constituting the third set of turns, (8) and (9) are provided.

Further, as shown in FIGS. 34 and 35, the second-stage panel layer 4B includes U-phase bus bar conductors 41U (4), (5), (6) and a third one constituting the second set of turns. V-phase bus bar conductors 41V (7), (8), (9) constituting the turn of the first set, and W-phase bus bar conductors 41W (1), (2), (9) constituting the first set of turns. And 3).
Further, as shown in FIGS. 36 and 37, the third-stage panel layer 4C includes the U-phase bus bar conductors 41U (7), (8), (9) constituting the third set of turns and the first one. V-phase bus bar conductors 41V (1), (2), (3) constituting the second set of turns and W-phase bus bar conductors 41W (4), (5), (3) constituting the second set of turns. 6).
Note that the bus bar conductors 41U, V, and W of each phase may be provided by being dispersed in a pattern different from this example with respect to the three panel layers 4A, B, and C.

  In this example, as shown in FIG. 31, the plurality of insertion conductors 32U, V, and W that are inserted into the slots 22 are provided on the stator core 2 in order to secure the space of the bus bar conductors 41U, V, and W. Four pieces located on the inner peripheral side have the same cross-sectional shape up to the joints with the bus bar conductors 41U, V, and W.

Also in this example, other configurations are the same as those in the second embodiment.
Also in this example, three panel layers 4A, 4B, and 4C can be formed by stacking panel layers having the same shape with a phase difference of 120 ° from each other. Thereby, the formation state of the bus-bar conductor 41 provided in the three-layer panel layers 4A, 4B, and 4C can be made the same, and the structure of the turn bus panel 4 can be simplified. In this example as well, other functions and effects similar to those of the second embodiment can be obtained.

(Example 5)
In this example, as shown in FIG. 39 and FIG. 40, a device is devised that makes it easier to join the bus bar conductors 41U, V, and W of each phase in the three panel layers 4A, B, and C. .
That is, in the three-layer panel layers 4A, B, and C of this example, the end of the bus bar conductor 41 and the end of the insertion conductor 32 provided in the first-stage panel layer 4A are the same as in the second embodiment. The first-stage connection position 401, the second-stage connection position 402 between the end of the bus bar conductor 41 provided in the first-stage panel layer 4B and the end of the insertion conductor 32, and the bus-bar conductor provided in the third-stage panel layer 4C Corresponding to the third-stage connection position 403 between the end portion 41 and the end portion of the insertion conductor 32, communication ports 45 communicating with each other in the axial direction L of the stator core 2 are formed.

  Further, as shown in FIG. 40, at the end portions of the bus bar conductors 41U, V, W of each phase provided in the first-stage panel layer 4A, the outer ends of the stator core 2 are bent outward in the axial direction L, and at least A first-stage lead-out end 411A drawn to the third-stage panel layer 4C is formed. The first-stage lead-out end portion 411A passes through the communication port 45 in the first-stage panel layer 4A and the communication port 45 in the second-stage panel layer 4B from the slot 22 of the stator core 2 in the third-stage panel layer 4C. It is joined to the insertion conductors 32U, V, W of each phase in a state of being inserted into the communication port 45.

Further, as shown in the figure, the end portions of the bus bar conductors 41U, V, W of each phase provided in the second-stage panel layer 4B are bent outward in the axial direction L of the stator core 2, and at least A second-stage lead-out end 411B drawn to the third-stage panel layer 4C is formed. The second-stage lead-out end portion 411B passes through the communication port 45 in the first-stage panel layer 4A and the communication port 45 in the second-stage panel layer 4B from the slot 22 of the stator core 2 in the third-stage panel layer 4C. It is joined to the insertion conductors 32U, V, W of each phase in a state of being inserted into the communication port 45.
Further, the end portions of the bus bar conductors 41U, V, W of each phase provided in the third-stage panel layer 4C are connected to the communication port 45 and the second-stage panel layer 4B in the first-stage panel layer 4A from the slot 22 of the stator core 2. Are connected to the insertion conductors 32U, V, and W of each phase in a state of being inserted through the communication port 45 to the third-stage panel layer 4C.

Also in this example, other configurations are the same as those in the second embodiment.
In this example, the joining of the bus bar conductors 41U, V, W of each phase can be performed at the outer position in the axial direction L of the stator core 2 than the third-stage panel layer 4C or the third-stage panel layer 4C. Thereby, the bus bar conductors 41U, V, and W of each phase can be joined more efficiently, and the productivity of the stator 1 can be further improved. In this example as well, other functions and effects similar to those of the second embodiment can be obtained.

FIG. 3 is a plan view showing the entire first-stage panel layer in the turn bus panel according to the first embodiment. FIG. 3 is a plan view showing a first-stage panel layer partially enlarged in Example 1. FIG. 3 is a plan view showing the entire second-stage panel layer in the turn bus panel according to the first embodiment. FIG. 3 is a plan view illustrating a partially enlarged second-stage panel layer in the first embodiment. FIG. 3 is a plan view showing the entire third-stage panel layer in the turn bus panel according to the first embodiment. FIG. 3 is a plan view showing a third-stage panel layer in a partially enlarged manner in the first embodiment. Sectional explanatory drawing which shows the three-phase coil arrange | positioned in the slot of a stator core in Example 1. FIG. FIG. 2 is a plan view showing a partially enlarged cross-sectional view of a crossover bus panel in the first embodiment. FIG. 3 is an explanatory diagram schematically showing an arrangement state of U-phase coils in the stator core in the first embodiment. The side view which shows the stator for three-phase motors in Example 1. FIG. Sectional explanatory drawing which shows the arrangement | positioning state of the penetration conductor in the slot in a stator core in Example 1. FIG. FIG. 3 is an explanatory diagram showing a loop-shaped conductor part in Example 1. The top view which shows the whole 1st step panel layer in Example 2. FIG. FIG. 6 is a plan view showing a first-stage panel layer partially enlarged in Example 2. FIG. 6 is an explanatory diagram schematically showing the arrangement state of bus bar conductors in the first-stage panel layer in Example 2. The top view which shows the whole 2nd step | paragraph panel layer in Example 2. FIG. FIG. 6 is a plan view showing a partially enlarged second-stage panel layer in Example 2. Explanatory drawing which shows typically the arrangement | positioning state of the bus-bar conductor in the 2nd step | paragraph panel layer in Example 2. FIG. The top view which shows the whole 3rd step | paragraph panel layer in Example 2. FIG. FIG. 9 is a plan view showing a third-stage panel layer partially enlarged in Example 2. FIG. 6 is an explanatory diagram schematically showing the arrangement state of bus bar conductors in a third-stage panel layer in Example 2. The top view which shows the whole bus panel for connecting lines in Example 2. FIG. Sectional explanatory drawing which shows the periphery of the bus panel for turns and the bus panel for connecting lines in Example 2. FIG. FIG. 6 is a plan view showing the entire common panel layer in Example 3. FIG. 9 is a plan view showing a first-stage panel layer in a partially enlarged manner in Example 3. Explanatory drawing which shows typically the arrangement | positioning state of the bus-bar conductor in the 1st-stage panel layer in Example 3. FIG. FIG. 10 is a plan view showing a partially enlarged second-stage panel layer in Example 3. Explanatory drawing which shows typically the arrangement | positioning state of the bus-bar conductor in the 2nd step | paragraph panel layer in Example 3. FIG. FIG. 9 is a plan view showing a third-stage panel layer partially enlarged in Example 3. Explanatory drawing which shows typically the arrangement | positioning state of the bus-bar conductor in the 3rd-stage panel layer in Example 3. FIG. The top view which shows the whole common panel layer in Example 4. FIG. FIG. 6 is a plan view showing a partially enlarged first-stage panel layer in Example 4. Explanatory drawing which shows typically the arrangement | positioning state of the bus-bar conductor in the 1st-stage panel layer in Example 4. FIG. FIG. 10 is a plan view showing a partially enlarged second-stage panel layer in Example 4. Explanatory drawing which shows typically the arrangement | positioning state of the bus-bar conductor in the 2nd step | paragraph panel layer in Example 4. FIG. FIG. 9 is a plan view showing a third-stage panel layer partially enlarged in Example 4; Explanatory drawing which shows typically the arrangement | positioning state of the bus-bar conductor in the 3rd step | paragraph panel layer in Example 4. FIG. Sectional explanatory drawing which shows the periphery of the bus panel for turns and the bus panel for connecting lines in Example 4. FIG. Sectional explanatory drawing which shows the periphery of the bus panel for turns and the bus panel for connecting lines in Example 5. FIG. FIG. 10 is an explanatory view showing a first-stage (second-stage) lead-out end portion of a bus bar conductor of each phase provided in a first-stage (second-stage) panel layer in Example 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stator for 3 phase motors 2 Stator core 201 One side axial end surface 202 The other side axial end surface 22 Slot U2 One side U phase slot U1 The other side U phase slot V2 One side V phase slot V1 The other side V Phase slot W2 One side W phase slot W1 The other side W phase slot 3U U phase coil 3V V phase coil 3W W phase coil 30 Coil end portion 31U, V, W Loop conductor 310 U-shaped conductor portion 32U, V, W Insertion conductor 33 Connecting conductor part 4 Turn bus panel 4A First stage panel layer 4B Second stage panel layer 4C Third stage panel layer 41U, V, W Bus bar conductor 411A First stage leading end 411B 2 Step lead-out end 45 Communication port 5 Bus panel for connecting line 51U, V, W Conductor for connecting line L Axial direction C Circumferential direction R Radial direction

Claims (16)

A stator for a three-phase motor having a stator core having a plurality of slots, and U-phase, V-phase and W-phase coils arranged in a distributed winding state with a predetermined number of slots in the plurality of slots. In
On at least one of the axial end faces of the stator core, a turn bus panel formed by laminating a plurality of panel layers in the axial direction of the stator core is disposed oppositely.
The conductor portion that protrudes from the axial end surface of the stator core and is arranged in parallel to the panel layer in the coil of each phase is formed by a bus bar conductor for turn configuration provided in the panel layer,
The stator for a three-phase motor, wherein the U-phase bus bar conductor, the V-phase bus bar conductor, and the W-phase bus bar conductor are respectively distributed in the plurality of panel layers. In Claim 1, the three-phase coil is a monopolar coil formed by turning a plurality of times,
A crossover bus panel provided with a crossover conductor for connecting the three-phase single-pole coils for each phase is arranged opposite to the outside of the turn bus panel in the axial direction. A stator for a three-phase motor.   3. The outer panel layer according to claim 1 or 2, wherein the predetermined number of the plurality of bus bar conductors provided in the outer panel layer is the outer panel layer in the outer panel layer positioned on the outer side in the axial direction among the plurality of panel layers. A three-phase motor for a three-phase motor characterized in that it is connected to a conductor portion drawn from an axial end face of the stator core through the bus bar conductors provided on the inner panel layer positioned on the inner side in the axial direction. Stator. In any one of Claims 1-3, the said panel layer in the said bus panel for turns is laminated | stacked on three layers,
The stator for a three-phase motor, wherein the U-phase bus bar conductor, the V-phase bus bar conductor, and the W-phase bus bar conductor are respectively distributed in the three panel layers.   5. The U-phase bus bar conductor, the V-phase bus bar conductor, and the W-phase bus bar conductor are respectively provided in the three panel layers in a distributed manner in an equal number. A stator for a three-phase motor. In Claim 4 or 5, the three panel layers are sequentially laminated as a first-stage panel layer, a second-stage panel layer, and a third-stage panel layer from the side near the axial end surface of the stator core,
In the third-stage panel layer, a predetermined number of the plurality of bus bar conductors provided in the third-stage panel layer is between the bus bar conductors provided in the first-stage panel layer and the two-stage panel layers. It is joined to the conductor portion drawn from the axial end surface of the stator core through at least one of the bus bar conductors provided in the eye panel layer,
In the second stage panel layer, a predetermined number of the plurality of bus bar conductors provided in the second stage panel layer passes between the bus bar conductors provided in the first stage panel layer. A three-phase motor characterized by being joined to a conductor portion drawn from an end surface in the axial direction of a stator core. 7. The conductor portion drawn out from the axial end surface of the stator core to the panel layers in the coils of the phases, and the bus bar conductors in the panel layers according to claim 1, Flat in the radial direction of
The bus bar conductor in each panel layer is provided by utilizing the space formed in each panel layer by flattening the conductor portion, and a stator for a three-phase motor. The panel panel according to any one of claims 4 to 7, wherein any one of the panel layers is a first panel layer, and any one of the panel layers different from the first panel layer is a second panel layer. And when the remaining panel layer is the third panel layer,
The U-phase bus bar conductors, the V-phase bus bar conductors, and the W-phase bus bar conductors have a first turn on the first panel layer. The bus bar conductors constituting the third panel layer are provided with the bus bar conductors constituting the third turn and the bus bar conductors constituting the fourth and subsequent turns are also rotated in the same manner as described above. A stator for a three-phase motor, characterized in that The panel panel according to any one of claims 4 to 7, wherein any one of the panel layers is a first panel layer, and any one of the panel layers different from the first panel layer is a second panel layer. And when the remaining panel layer is the third panel layer,
In the plurality of U-phase bus bar conductors, the bus bar conductor constituting the first turn constitutes the first panel layer, and the bus bar conductor constituting the second turn constitutes the third turn in the second panel layer. Bus bar conductors are provided in the third panel layer, and the bus bar conductors constituting the fourth and subsequent turns are also provided in the same rotation as described above.
The bus bar conductors constituting the first turn constitute the third turn in the second panel layer, and the bus bar conductors constituting the second turn constitute the third turn in the third panel layer. Bus bar conductors are provided in the first panel layer, and bus bar conductors constituting the fourth and subsequent turns are also provided in the same rotation as described above.
The plurality of W-phase bus bar conductors, the bus bar conductor constituting the first turn constitutes the third panel layer, and the bus bar conductor constituting the second turn constitutes the third turn in the first panel layer. The bus bar conductor is provided on the second panel layer, and the bus bar conductor constituting the fourth and subsequent turns is also provided by the same rotation as described above. The panel panel according to any one of claims 4 to 7, wherein any one of the panel layers is a first panel layer, and any one of the panel layers different from the first panel layer is a second panel layer. And when the remaining panel layer is the third panel layer,
The plurality of U-phase bus bar conductors are adjacent to each other to form a first set of turns, and the plurality of bus bar conductors are adjacent to each other on the first panel layer to form a second set of turns. A plurality of bus bar conductors are provided on the second panel layer, and a plurality of bus bar conductors constituting a third set of turns adjacent to each other are provided on the third panel layer,
The plurality of V-phase bus bar conductors are adjacent to each other to form a first set of turns, and the plurality of bus bar conductors are adjacent to each other on the second panel layer to form a second set of turns. A plurality of bus bar conductors are provided on the third panel layer, and a plurality of bus bar conductors constituting a third set of turns adjacent to each other are provided on the first panel layer,
The plurality of W-phase bus bar conductors are adjacent to each other to form a first set of turns, and the plurality of bus bar conductors are adjacent to each other on the third panel layer to form a second set of turns. One bus bar conductor is provided on the first panel layer, and a plurality of bus bar conductors constituting a third set of turns adjacent to each other are provided on the second panel layer, respectively. Stator. In any one of Claims 1-10, the said bus panel for a turn is opposingly arranged by the axial direction end surface of the one side of the said stator core,
The coil of each phase uses a U-shaped conductor portion formed by connecting a pair of insertion conductors inserted and arranged in the slot at one end, and the bus bar conductor provided on the panel layer of the bus panel for turn. A stator for a three-phase motor, wherein In any one of Claims 1-10, the said bus panel for turns is arrange | positioned facing the axial direction end surface of the both sides of the said stator core,
The coil of each phase is formed by using an insertion conductor inserted in the slot and the bus bar conductor provided in the panel layer of the turn bus panel. Stator. In claim 11 or 12, the cross-sectional area of the insertion conductor and the cross-sectional area of the bus bar conductor are the same,
A stator for a three-phase motor, wherein the bus bar conductor has a smaller thickness in the radial direction of the stator core than the insertion conductor. In any one of Claims 11-13, the cross-sectional area of the said insertion conductors penetrated by the same said slot is the same,
The three-phase insertion conductor has a three-phase structure in which the width in the circumferential direction of the stator core is smaller than that located on the inner circumferential side of the stator core as compared with that located on the outer circumferential side of the stator core. Stator for motor. 15. The three-layer panel layer according to claim 11, wherein the three-layer panel layers are sequentially formed as a first-stage panel layer, a second-stage panel layer, and a third-stage panel layer from a side close to the axial end surface of the stator core. Laminated,
In the three-layer panel layer, the first-stage connection position between the end of the bus bar conductor provided in the first-stage panel layer and the end of the insertion conductor, and the bus bar provided in the second-stage panel layer The second-stage connection position between the end of the conductor and the end of the insertion conductor, and the third-stage connection position between the end of the bus bar conductor provided on the third-stage panel layer and the end of the insertion conductor Correspondingly, a communication port communicating with each other toward the axial direction of the stator core is formed,
An end portion of the bus bar conductor provided in the first-stage panel layer is joined to the insertion conductor in a state of being inserted from the slot to the communication port in the first-stage panel layer,
The end of the bus bar conductor provided in the second-stage panel layer is inserted into the communication opening in the second-stage panel layer from the slot through the communication opening in the first-stage panel layer. It is joined to the insertion conductor,
The end portion of the bus bar conductor provided in the third-stage panel layer is connected to the third-stage panel from the slot through the communication port in the first-stage panel layer and the communication port in the second-stage panel layer. A stator for a three-phase motor, wherein the stator is joined to the insertion conductor inserted into the communication port in the layer. 15. The three-layer panel layer according to claim 11, wherein the three-layer panel layers are sequentially formed as a first-stage panel layer, a second-stage panel layer, and a third-stage panel layer from a side close to the axial end surface of the stator core. Laminated,
In the three-layer panel layer, the first-stage connection position between the end of the bus bar conductor provided in the first-stage panel layer and the end of the insertion conductor, and the bus bar provided in the second-stage panel layer The second-stage connection position between the end of the conductor and the end of the insertion conductor, and the third-stage connection position between the end of the bus bar conductor provided on the third-stage panel layer and the end of the insertion conductor Correspondingly, a communication port communicating with each other toward the axial direction of the stator core is formed,
At the end portion of the bus bar conductor provided in the first-stage panel layer, a first-stage lead-out end portion that is bent outward in the axial direction of the stator core and drawn to at least the third-stage panel layer is formed. The first-stage lead-out end portion extends from the slot through the communication port in the first-stage panel layer and the communication port in the second-stage panel layer, and the communication in the third-stage panel layer. It is joined to the insertion conductor in the state of being inserted into the mouth,
At the end portion of the bus bar conductor provided in the second-stage panel layer, a second-stage lead-out end portion that is bent outward in the axial direction of the stator core and drawn to at least the third-stage panel layer is formed. The second stage lead-out end portion extends from the slot through the communication opening in the first stage panel layer and the communication opening in the second stage panel layer, and the communication in the third stage panel layer. A stator for a three-phase motor, wherein the stator is joined to the insertion conductor inserted into the mouth.

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