JP5626575B2 - Rotating electrical machine, its stator and manufacturing method - Google Patents

Description

  The present invention relates to a rotating electrical machine mounted on a vehicle or the like, a stator thereof, and a manufacturing method.

  Conventionally, as a stator of a rotating electrical machine, a plurality of annular thin steel plates having a plurality of slots arranged in the circumferential direction are stacked (hereinafter, the stacking direction is referred to as a stacking direction). 2. Description of the Related Art A core is known that includes a core and a stator winding (hereinafter also referred to as a coil) wound around the stator core such that a plurality of conductors are arranged in the radial direction in each slot. . In such a stator core, if the position of the conductor in the slot is not wound at an appropriate position, the magnetic characteristics will deteriorate, the coil vortex loss will increase, or in the worst case, the coil will Therefore, it is necessary to fix the conductor in an appropriate position in the slot. As a conventional technique, as disclosed in Patent Document 1, there is a method of fixing a stator or insulating paper and a conductor by an impregnation process using a liquid resin.

  As another method, as disclosed in Patent Document 2, an insulating paper is wound around a conductor and inserted into a slot, and a wedge is inserted into a slot gap on the inner peripheral side to fix a coil. There is a type that keeps the effect of fixing the coil by the wedge by folding the end portion of the wire to bring it into contact with the wedge and fixing the wedge.

JP 2006-262541 A Japanese Patent No. 3572206

  However, in the impregnation treatment using the liquid resin in Patent Document 1 described above, a technique for accurately positioning the coil in the slot has not been established, and the coil is located on the inner peripheral side until the position where the magnetic characteristics and the coil vortex loss deteriorate. There is a possibility to stop by.

  In the case of Patent Document 2, since a plurality of insulating papers are used for the purpose of preventing the coil from being damaged when the wedge is inserted and fixing the wedge, the material cost is increased. Moreover, since high precision is required for the folding process of the insulating paper for fixing the wedge, it takes time and effort to increase the machining cost. Furthermore, depending on the usage environment of the rotating electrical machine, there may be a large impact force in the direction of the rotation axis, the strength is insufficient with fixing with insulating paper, and therefore it is not possible to fully handle the wedge load generated by the impact, The coil position may be shifted.

  The present invention has been made in view of such circumstances, and can prevent the coil wound around the stator core from moving radially inward of the slot, thereby securely fixing the coil. It aims at providing the rotary electric machine which can be fixed to a child core, its stator, and a manufacturing method.

In order to achieve the above object, the invention according to claim 1 is characterized in that an annular stator core having a plurality of slots in the circumferential direction and a leg portion of a conductor segment are inserted into the slot and externally connected from the slot. In the stator of a rotating electrical machine having a stator winding wound around the stator core by connecting the projecting end portions of the conductor segments projecting to each other, the stator winding is connected to the slot. A radially inwardly located protruding end protruding from the slot includes a bent portion bent toward the radially inward side, and an opening edge of the slot and a stator on the innermost peripheral side of the slot the gap between the windings, the coil fixing member of nonmagnetic be one obtained by fitting, the coil fixing member is smaller than the radial spacing of the gaps, shorter slot than laminated thickness direction of thickness of the stator core The insertion section and the song Characterized in that it comprises an inclined portion which abuts the section.

  According to this configuration, since the nonmagnetic coil fixing member is fitted in the gap between the opening edge of the slot and the innermost stator winding, rattling of the stator winding in the slot can occur. Therefore, the stator winding can be reliably fixed. By fixing the stator winding in this manner, the conductor of the stator winding does not move toward the inner peripheral side in the slot (does not move), so that the gap between the stator winding and the rotor is maintained at a predetermined distance. As a result, an increase in coil vortex loss can be suppressed.

Further , the movement of the coil to the inner peripheral side in the slot can be suppressed by the slot insertion portion of the coil fixing member. Further, by bringing the inclined portion of the coil fixing member into contact with the bent portion of the innermost stator winding, the coil fixing member and the innermost stator winding can be moved in the axial direction. Since it can restrain, a stator coil | winding can be reliably fixed with a coil fixing member.

The invention according to claim 2 is characterized in that the coil fixing member is disposed in a plurality of slots of the stator core on the same circumference as the slot.

According to this configuration, since the coil fixing member fixes the stator winding individually for each of the plurality of slots, even if the gap between the stator winding and the slot opening edge differs in the circumferential direction, the coil fixing member is fixed for each slot. The force to fix the child winding can be adjusted. For this reason, if the stator winding is fixed with an appropriate force in a plurality of slots, the stator winding can be reliably fixed in all the slots.

According to a third aspect of the present invention, the coil fixing member includes an annular main body that overlaps on the same circumference as all slots of the stator core, and at least a plurality of slots among all slots from the annular surface of the main body. And a slot insertion part which is inserted into the gap and fitted therein.

According to this configuration, even if, for example, one of the plurality of slot insertion portions is dropped from the annular main body of the coil fixing member, another slot insertion portion remains. The stator windings can be fixed to. Therefore, the stator winding in the slot can be securely fixed .

According to a fourth aspect of the present invention, the main body of the coil fixing member includes a divided main body obtained by dividing an annular shape of the main body into a plurality of parts, and an elastic support member obtained by connecting the divided main bodies so as to form the annular shape. It is characterized by comprising.

  According to this configuration, since the main body of the coil fixing member is formed by connecting a plurality of divided main bodies in an annular shape with an elastic support member, the annular main body is movable at the portions of the support members. Become. For this reason, when each slot insertion portion protruding from the main body is fitted into the gap in each slot of the stator core, even if the inner peripheral surface of the slot is bent, the divided main body is integrally joined to this bent portion. Since it moves, the main body is always arranged integrally with the stator core. For this reason, the slot insertion portion protruding from the main body is surely fitted in the gap between the slots, so that the stator winding is reliably fixed in the slot. Therefore, even if the inner peripheral surface of the stator is bent, the innermost stator winding in the slot can be prevented from jumping out of the slot.

The invention according to claim 5 is characterized in that the coil fixing member is integrally formed of the same member.

According to this structure, the by coil fixing member is integrally molded with the same members, and improve the rigidity and strength of the coil fixing member, Ru can increase the fixing force of the stator winding.

The invention described in claim 6 is characterized in that the coil fixing member has elasticity.

According to this configuration, since the coil fixing member has elasticity, for example, when the fixing force of the stator winding required for each slot is different, the slot insertion is performed in a state that substantially matches the different fixing force due to the elasticity. Since the portion is fitted into the gap in the slot, the stator winding can be reliably fixed over the entire circumference.

According to the seventh aspect of the present invention, the plurality of stator windings inserted in the slots in the radial direction include a conductor in the slot that is the stator winding, and a conductor that is connected to the conductor and protrudes from the slot. There are at least two kinds of angles between and.

According to this configuration, since there are at least two kinds of angles between the conductor in the slot and the conductor protruding from the slot in the stator winding, the conductors having different angles overlap each other in the radial direction of the slot. By being engaged and being fixed by the coil fixing member, the engaging portion is more firmly fixed. Therefore, the stator winding in the slot can be more reliably fixed. Further, since the conductor does not approach the inner peripheral side, coil vortex loss can be suppressed.

The invention according to claim 8 is characterized in that the angle decreases from the innermost side to the outermost side of the slot.

  According to this configuration, the angle formed between the conductor in the slot and the conductor protruding from the slot decreases from the innermost side toward the outermost side, so that the coil fixing member and the stator winding are connected to the stator. When assembling to the core, the stator winding can be assembled and fixed to the stator core by moving the stator winding toward the outer peripheral side in order from the outermost peripheral side to the inner peripheral side in the slot. That is, the stator winding can be easily assembled to the stator core.

According to the ninth aspect of the present invention, the plurality of stator windings inserted in the slot in the radial direction protrude from the slots connected to the conductors in the slots, which are the stator windings. The angle with the conductor is 0 ° in the conductor in the central portion in the radial direction, and the angle increases from the conductor at the angle 0 ° toward the outer peripheral side and the inner peripheral side.

  According to this configuration, when arranging the plurality of conductors of the stator winding in the radial direction in the slot elongated in the radial direction, the conductor protruding outside the slot from the inside of the slot in the radial center portion of the slot is linear, The angle between the slot of the conductor and the protruding portion of the conductor is increased as it goes from the linear conductor toward the outer peripheral side and the inner peripheral side. The first conductor having such an angle has a height of the bent portion of the conductor necessary for separating the joint portions of the projecting end portions protruding from the slot as compared with the second conductor described below. It can be lowered. In the second conductor, the outermost conductor in the slot is linear, and the angle increases according to the conductor from the linear conductor toward the inner periphery. In the case of the second conductor, the angle is increased from the outer peripheral side. However, in the case of the first conductor, the angle is increased from the central conductor toward the inner and outer peripheral sides. If the number of conductors is the same for the first and second conductors, the first conductor may have a smaller bending angle. If a small bending angle is sufficient, the height to the bending portion necessary for separating adjacent conductors can be reduced. Therefore, it is possible to reduce the height of the bent portion of the conductor necessary for separating the joint portions of the projecting end portions from the slot.

The invention according to claim 10 is characterized in that the angle formed by the conductor in the slot and the conductor protruding from the slot is gradually changed at the protruding end protruding from the slot.

  According to this configuration, since the angle formed between the conductor in the slot and the conductor protruding from the slot (the angle of the bent portion) is gradually changed, when the coil fixing member and the stator winding are assembled to the stator core, they are adjacent to each other. The contact surfaces of the conductors to be contacted can be reasonably contacted and fixed. As a result, it is possible to prevent the stator windings from being damaged due to interference between the conductors and the slot inner wall that occur when the conductors are fixed in the slots.

The invention described in claim 11 is characterized by using the stator of the rotating electrical machine described in any one of claims 1-10 .

  According to this configuration, the rotating electric machine according to the twelfth aspect of the present invention can also obtain the same effects as those of the stator described above.

According to a twelfth aspect of the present invention, there is provided an annular stator core having a plurality of slots in the circumferential direction, and a projecting end portion of the conductor segment projecting outward from the slot by inserting a leg portion of the conductor segment into the slot. In a method of manufacturing a stator of a rotating electrical machine having a stator winding wound around the stator core by connecting different stators to each other, when winding the stator winding around the stator core , the gap between the innermost circumference side of the stator winding of the slot in the radially innermost side to the definitive the slot of the opening edge and the slot, the lamination thickness of less said stator core than the radial spacing of the gap A first step of fitting a non-magnetic coil fixing member having a slot insertion portion shorter than a thickness in the direction and an inclined portion; and a radially outer side of the coil fixing member fitted in the first step And the conductor segment A second step of sequentially inserting the conductor segments having a bent portion which is bent radially inward side of the bets abuts on the inclined portion, after completion of insertion of the conductor segments having the bending portion in the second step And a third step of inserting a linear conductor segment into the slot.

  According to this method, since the non-magnetic coil fixing member is fitted into the gap between the opening edge of the slot and the innermost stator winding, rattling of the stator winding in the slot occurs. Therefore, the stator winding can be reliably fixed. Also, when fitting the coil fixing member into the gap in the slot, first insert the coil fixing member into the slot, then insert the conductor segments with bent parts sequentially, and finally insert the linear conductor segment Therefore, the coil fixing member can be easily fitted.

It is an axial direction sectional view showing typically the composition of the rotary electric machine concerning a 1st embodiment. It is the perspective view seen from the conductor segment insertion side of the stator which concerns on 1st Embodiment. It is the perspective view seen from the conductor segment connection side of the stator which concerns on 1st Embodiment. It is a fragmentary top view which shows the principal part of the stator which concerns on 1st Embodiment. It is a fragmentary sectional view showing an important section of a stator concerning a 1st embodiment. It is a perspective view of the coil fixing member concerning a 1st embodiment. It is a fragmentary sectional view showing an important section of a stator concerning a 2nd embodiment. It is a perspective view of the coil fixing member which concerns on 2nd Embodiment.

  Embodiments of the present invention will be described below with reference to the drawings. However, parts corresponding to each other in all the drawings in this specification are denoted by the same reference numerals, and description of the overlapping parts will be omitted as appropriate.

(First embodiment)
FIG. 1 is an axial cross-sectional view schematically showing the configuration of the rotating electrical machine according to the first embodiment of the present invention. FIG. 2 is a perspective view of the stator according to the first embodiment as viewed from the conductor segment insertion side. FIG. 3 is a perspective view of the stator according to the first embodiment as viewed from the conductor segment connection side. FIG. 4 is a partial plan view showing a main part of the stator according to the first embodiment. FIG. 5 is a partial cross-sectional view showing a main part of the stator according to the first embodiment. FIG. 6 is a perspective view of the coil fixing member according to the first embodiment.

  The rotating electrical machine 1 according to the present embodiment is rotatably supported by a housing 10 in which a pair of substantially bottomed cylindrical housing members 10a and 10b are joined to each other through openings and bearings 11 and 12. A rotor (rotor) 14 fixed to the rotating shaft 13, and a stator 20 fixed to the housing 10 at a position surrounding the rotor 14 inside the housing 10.

  In the rotor 14, a plurality of magnetic poles having different magnetism alternately in the circumferential direction are formed by a permanent magnet on the outer circumferential side facing the inner circumferential side of the stator 20. The number of magnetic poles of the rotor 14 is not limited because it varies depending on the rotating electrical machine. In this embodiment, an 8-pole rotor (N pole: 4, S pole: 4) is used.

  As shown in FIGS. 2 and 3, the stator 20 includes an annular stator core 30 having a plurality of slots 31 arranged in the circumferential direction, and a plurality of conductor segments 41 aligned in the radial direction in the slots 31. Thus, a three-phase stator winding 40 wound around the stator core 30 is provided.

  As shown in FIG. 4, the stator core 30 has an annular back core portion 32 positioned on the outer peripheral side, and a plurality of stator cores 30 that protrude radially inward from the back core portion 32 and are arranged at a predetermined distance in the circumferential direction. Of teeth 33. Between the adjacent teeth 33, that is, between the side surfaces 33 a facing each other in the circumferential direction of the adjacent teeth 33, a slot 31 opened to the inner peripheral side of the stator core 30 is formed. The slot 31 is formed so that the depth direction thereof coincides with the radial direction. The slots 31 are formed at a ratio of two per one phase of the stator winding 40 with respect to the number of magnetic poles (8) of the rotor. In this embodiment, 8 × 3 × 2 = 48 slots 31 are formed. Also, 48 teeth 33 are provided in the same number as the slots 31.

  At the tip end portion of the tooth 33, a flange 33b that protrudes from the side surface 33a to both sides in the circumferential direction is formed. Further, an insulating paper 34 is inserted and disposed at the peripheral edge of the slot 31 so as to cover both side surfaces 33 a and the bottom surface of the slot 31.

  As shown in FIGS. 2 and 3, the stator winding 40 is formed in a substantially cylindrical shape by connecting a plurality of conductor segments 41 inserted into the slots 31 of the stator core 30. More specifically, the plurality of conductor segments 41 are arranged in the radial direction in the slot 31 so that the conductor segment 41 is inserted in the axial direction in the vicinity of the radial center of the slot 31 and moved toward the radially inner side or the outer side. (Refer to FIG. 4). The conductor segments 41 projecting outward from the slots 31 are connected to each other and connected to the stator core 20 by connecting the projecting tips.

  In the present embodiment, as shown in FIG. 4, twelve conductor segments 41 are inserted and arranged in each slot 31 so as to be aligned in the radial direction. Hereinafter, in order to facilitate understanding, the twelve conductor segments 41 arranged in the slot 31 are arranged in order from the radially inner side to the outer side in order from the first conductor segment 41a and the second conductor segment 41b. ,... Will be referred to as a tenth conductor segment 41j. In addition, when connecting the front-end | tip parts of the protrusion end part of the 1st-10th conductor segments 41a-41j, in order to ensure an insulation distance between each connection site | part, the 1st-10th conductor segments 41a- Among 41j, the projecting end portion includes one having a bent portion bent to one of the radially inner side and the outer side. In this case, the first to fifth conductor segments 41a to 41e (inner side conductor segments) are inserted in the axial direction near the radial center of the slot 31 and are moved radially inward. The eighth to tenth conductor segments 41h to 41j (outer side conductor segments) are inserted in the axial direction near the radial center of the slot 31 and moved toward the radially outer side. The sixth and seventh conductor segments (center conductor segments) 41f and 41g are finally inserted in the axial direction near the radial center of the slot 31, and are radially inward and outward. It is not sent to any. A nonmagnetic coil fixing member 50 is installed so as to cover a space formed by the adjacent flanges 33b and the first conductor segments 41a arranged on the radially inner side of the slot 31.

  As shown in FIGS. 5 and 6, the coil fixing member 50 is smaller than the gap between the opening edge of the slot 31 of the stator core 30 and the stator winding 40 on the innermost peripheral side. The slot insertion portion 51 is shorter than the stack thickness, and the inclined portion 52 is in contact with the inward bending portion 411a of the first conductor segment 41a. However, when the coil fixing member 50 is to be fitted, after inserting the coil fixing member 50 into the slot 31, the conductor segment 41a bent in the radial direction on the innermost diameter side is inserted, and then sequentially bent in the radial direction. The conductor segments 41b, 41c, 41j and 41i are inserted, and finally the straight conductor segment 41 is inserted.

  The conductor segment 41 constituting the stator winding 40 is composed of a substantially V-shaped head and a pair of legs extending linearly from both ends of the head. The overall shape is substantially U-shaped. Yes. The conductor segment 41 employs a rectangular conductor composed of a conductor portion having a rectangular cross section and an insulating film covering the surface of the conductor portion. Each leg portion has a slot accommodating portion accommodated in the slot 31 and a protruding end portion that extends from the tip of the slot accommodating portion and protrudes from the slot 31. Note that the stator winding 40 wound around the stator core 30 has a ring-shaped first coil end 45 as a whole by the protruding end portion of the conductor segment 41 protruding to one end side in the axial direction of the stator core 30. The ring-shaped second coil end 46 is formed as a whole by the head portion (turn portion) of the conductor segment 41 formed and projecting to the other axial end side of the stator core 30.

  This conductor segment 41 has both leg portions inserted axially into slots 31 having different circumferential directions, and projecting end portions projecting outward from the slot 31 by a necessary length, thereby projecting end portions of the respective conductor segments 41. Are twisted in the circumferential direction by a substantially electrical angle π / 2, and the leading end portions (joining portions) of the protruding end portions of the conductor segments 41 are connected in a predetermined combination. The entire surface of the conductor segment 41 excluding the connection portion (the tip of the protruding end) is covered with an insulating film. In addition, after the connection part (tip part of the projecting end part) where the conductor is exposed is connected, an insulation treatment is performed with a powder resin or the like.

  According to the stator 20 of the rotating electrical machine of the first embodiment configured as described above, the adjacent flange (opening edge) 33b of the stator core 30 and the most radially inner side of the slot 31 are arranged. A coil fixing member 50 is fitted in a gap space formed by the one conductor segment 41a. For this reason, there is no gap in the slot 31, and the stator winding 40 can be reliably fixed. By fixing the stator winding 40 in this way, the conductor of the stator winding 40 does not move toward the inner peripheral side in the slot (does not move), so that the gap between the stator winding 40 and the rotor 14 is increased. A predetermined distance can be maintained. Thus, by fixing the conductor segment 41 at a position away from the rotor 14, it is possible to reduce the copper vortex loss generated in the conductor segment 41 disposed on the radially inner side.

  Further, the stator winding 40 of the present embodiment is arranged in the slot 31 so that the first conductor segment 41a is inserted in the axial direction in the vicinity of the radial center of the slot 31 and is moved radially inward. A predetermined projecting tip of the first conductor segment 41 a projecting outward from the slot 31 is connected to the projecting tip of another conductor segment 41 so as to be wound around the stator core 30. The coil fixing member 50 is installed such that the inclined portion 52 of the coil fixing member 50 is in contact with the inwardly bent portion 411a of the first conductor segment 41a. Therefore, the coil fixing member 50 is securely fixed at a predetermined position by the inwardly bent portion 411a of the first conductor segment 41a connected to the other conductor segment 41 and the inclined portion 52 of the coil fixing member 50. Therefore, the effect of reducing the copper vortex loss can be maintained.

  Further, the stator winding 40 has a slot extending from the inside of the slot 31 in the radial center portion of the slot 31 when arranging the plurality of conductor segments 41 of the stator winding 40 in the radial direction in the slot 31 elongated in the radial direction. The conductor segment 41 protruding outside 31 is made linear, and the angle between the inside of the slot 31 of the conductor segment 41 and the protruding portion of the conductor is increased from the linear conductor segment 41 toward the outer peripheral side and the inner peripheral side. Yes. When the angles are set in this way, the height of the bent portion of the conductor segment 41 required to separate the joint portions of the protruding end portions protruding from the slot 31 as compared with each conductor segment 41 shown in FIG. It becomes possible to make h1 (FIG. 5) lower than h2 (FIG. 7).

  In the case of the conductor segment 41 in FIG. 5, the angle increases from the central conductor segment 41 toward the inner and outer peripheral sides. Therefore, if the number of conductors in FIGS. 5 and 7 is the same, the conductor segment in FIG. No. 41 requires a smaller bending angle. If a small bending angle is sufficient, the height to the bending portion h1 required for separating the adjacent conductor segments 41 from each other may be lower than h2. Therefore, it is possible to reduce the height of the bent portion of the conductor segment 41 that is necessary for separating the joint portions of the projecting end portions of the conductor segment 41 from the slot 31.

Further, the coil fixing member 50 installed in the stator winding 40 is disposed on the same circumference in the plurality of slots 31 of the stator core 30 as shown in FIG. Even when the gaps 31 are different in the circumferential direction, the fixing force of the stator winding 40 can be adjusted in all the slots 31, so that the stator winding 40 can be reliably fixed in all the slots 31 .

Further, since the coil fixing member 50 has a shape integrally formed with the same member as shown in FIG. 6, the rigidity and strength of the coil fixing member 50 can be improved and the fixing force of the stator winding 40 can be increased. The stator winding 40 can be securely fixed.

Moreover, it is preferable that the coil fixing member 50 has elasticity. Thus, for example, when the required fixing force of the stator winding 40 is different for each slot 31, the slot insertion portion 51 is fitted into the gap in the slot in a state of being substantially adapted to the different fixing force due to elasticity. Therefore, the stator winding 40 can be reliably fixed over the entire circumference .

  Further, as described above, the plurality of stator windings 40 inserted in the slot 31 in the radial direction are connected to the conductor segment 41 in the slot 31 which is the stator winding 40, and to the conductor segment 41. It is preferable that there are at least two kinds of angles between the conductor segment 41 protruding from the surface.

As described above, since there are at least two kinds of angles formed between the conductor segments 41 in the slot 31 and protruding from the slot 31, the conductor segments 41 having different angles overlap each other by overlapping in the radial direction of the slot 31. When these are fixed by the coil fixing member 50, the engaging portion is fixed more firmly. Therefore, the stator winding 40 can be more reliably fixed. Moreover, since the conductor segment 41 does not approach the inner peripheral side, coil vortex loss can be suppressed.

(Second Embodiment)
FIG. 7 is a partial cross-sectional view showing a main part of the stator 20 according to the second embodiment. FIG. 8 is a perspective view of a coil fixing member 50-1 according to the second embodiment.

  As shown in FIG. 7, the stator 20 according to the second embodiment is configured such that the angle formed between the conductor segment 41 inside the slot 31 and the protruding end portion of the conductor segment 41 protruding from the slot 31 is from the innermost side to the outermost side. As shown in FIG. 8, the coil fixing member 50-1 has at least two semicircular coil fixing members 50 a and 50 b coupled by the support member 53. These two points are different from the first embodiment. Since other members and their configurations are the same as those in the first embodiment, detailed description thereof is omitted. However, it is preferable that the support member 53 has elasticity.

  However, when fitting the coil fixing member 50-1, the conductor segment bent in the radial direction on the innermost diameter side after inserting the coil fixing member 50-1 into the slot 31 as in the configuration of FIG. 5 described above. 41 is inserted, and then the conductor segments 41 bent in the radial direction are sequentially inserted, and finally the straight conductor segment 41 on the outermost diameter side is inserted.

  According to the stator 20 of the rotating electrical machine of the second embodiment configured as described above, the stator winding 40 is formed between the conductor segment 41 inside the slot 31 and the protruding end portion of the conductor segment 41 protruding from the slot 31. The angle decreases from the innermost side toward the outermost side. For this reason, when the coil fixing member 50 and the stator winding 40 are assembled to the stator core 30, the stator winding 40 is moved toward the outer peripheral side in order from the outermost peripheral side to the inner peripheral side in the slot 31. Can be assembled and fixed to the stator core 30. That is, the stator winding 40 can be easily assembled to the stator core 30.

  The main body 50-1 of the coil fixing member includes divided main bodies 50a and 50b obtained by dividing the annular shape of the main body into a plurality of parts, and an elastic support member 53 obtained by connecting the divided main bodies 50a and 50b so as to form an annular shape. And comprising.

Accordingly, since the coil fixing member main body 50-1 is formed by connecting the plurality of divided main bodies 50a and 50b in an annular shape with the elastic support member 53, the annular main body 50-1 is constituted by the support members. It becomes movable at 53. For this reason, when each slot insertion part 51 which protruded from the main body 50-1 was fitted in the gap in each slot 31 of the stator core 30, even if the inner peripheral surface of the slot 31 is bent, it is divided into the bent portions. Since the main bodies 50a and 50b are joined together and moved, the main body 50-1 is always disposed integrally with the stator core 30. For this reason, the slot insertion portion 51 protruding from the main body 50-1 is securely fitted in the gap of the slot 31, so that the stator winding 40 is securely fixed in the slot 31. Therefore, even if the inner peripheral surface of the stator 20 is bent, the stator winding 40 in the slot 31 can be reliably fixed.

(Other embodiments)
The present invention is not limited to the first and second embodiments described above, and various modifications can be made without departing from the spirit of the present invention. For example, in the first and second embodiments, twelve first to tenth conductor segments 41a to 41j are inserted in the slot 31 in the slots 31 and arranged in a row in the radial direction. However, the number of the conductor segments 41 inserted and disposed in the slot 31 may be appropriately changed according to the number of phases of the stator winding 40, the number of magnetic poles of the rotor, and the like. Further, the protruding end portion of the conductor segment 41 protruding from the slot 31 needs to be bent inward in the radial direction only in the first conductor segment 41a arranged on the radially inner side of the slot 31, About the other conductor segment 41, you may be bent by both the radial direction inner side and the outer side. Further, as to how to bend the conductor segment 41, in addition to bending the conductor segment 41 by providing an inflection point near the end face of the stator core 30, the angle of the conductor segment 41 is gradually changed from near the end face of the stator core 30. The method may be used.

  Further, the stator winding 40 of the above embodiment is wound around the stator core 30 by wave winding, but the connection combination of the tip end portion (joint portion) of the protruding end portion of the conductor segment 41 is changed. By doing so, other winding methods such as lap winding may be employed.

  Further, in the first and second embodiments, when the stator winding 40 is wound around the stator core 30, the non-magnetic coil fixing member 50 (or 50-1) is arranged on the radially innermost side of the slot 31. ), And a conductor having a bent portion bent radially inward of the conductor segment 41 on the radially outer side of the slot 31 of the fitted coil fixing member 50 (or 50-1). The segments 41 are sequentially inserted, and finally the linear conductor segment 41 is inserted.

  Therefore, when the coil fixing member 50 (or 50-1) is fitted into the gap in the slot 31, the coil fixing member 50 (or 50-1) is first inserted into the slot 31, and then a bending portion is provided. Since the conductor segments 41 are sequentially inserted and finally the linear conductor segments 41 are inserted, the coil fixing member 50 (or 50-1) can be easily fitted.

DESCRIPTION OF SYMBOLS 1 Rotating electrical machine 20 Stator 30 Stator core 31 Slot 32 Back core part 33 Teeth 33a Side surface 33b ３４ 34 Insulating paper 40 Stator winding 41 Conductor segment 41a-41j First to tenth conductor segment 45 First coil end 46 Second coil end 50, 50-1 Coil fixing member 51 Slot insertion portion 52 Inclined portion 53 Support member

Claims (12)

An annular stator core having a plurality of slots in the circumferential direction and a protruding end portion of a conductor segment that protrudes outward from the slot by inserting a leg portion of the conductor segment into the slot and connecting the different ones to each other In a stator of a rotating electric machine having a stator winding wound around a stator core,
The stator winding is located on the radially inward side of the slot, and has a bent portion bent toward the radially inward side at a protruding end protruding from the slot, and an opening edge of the slot the gap between the innermost circumference side of the stator winding of the slot, the coil fixing member of nonmagnetic be one obtained by fitting,
The coil fixing member includes a slot insertion portion that is smaller than a radial interval of the gap and shorter than a thickness in a stacking direction of the stator core, and an inclined portion that abuts the bending portion. Stator. The stator of a rotating electrical machine according to claim 1 , wherein the coil fixing member is disposed in a plurality of slots of the stator core on the same circumference as the slot. The coil fixing member is fitted into an annular main body that overlaps with all slots of the stator core on the same circumference, and is inserted into the gaps of at least a plurality of slots among all slots from the annular surface of the main body stator according to claim 1 or 2, characterized in that it comprises a slot insertion portion to be. The main body of the coil fixing member includes a divided main body obtained by dividing the annular shape of the main body into a plurality of parts, and an elastic support member that combines the divided main bodies so as to form the annular shape. The stator of the rotary electric machine according to claim 3 . The stator for a rotating electrical machine according to any one of claims 1 to 3 , wherein the coil fixing member is integrally formed of the same member. The stator for a rotating electrical machine according to any one of claims 1 to 3 , wherein the coil fixing member has elasticity. The plurality of stator windings inserted in the slot in the radial direction has an angle between a conductor in the slot which is the stator winding and a conductor connected to the conductor and protruding from the slot at least 2. The stator for a rotating electrical machine according to any one of claims 1 to 6 , wherein there are more than one type. The stator of the rotating electrical machine according to claim 7 , wherein the angle decreases from the innermost circumferential side to the outermost circumferential side of the slot. The plurality of stator windings inserted in the slot in the radial direction has an angle between a conductor in the slot that is the stator winding and a conductor connected to the conductor and protruding from the slot in the radial direction. of the conductors of the central portion is 0 °, according to any one of claims 1 to 6, characterized in that the angle is larger toward the outer peripheral side and inner peripheral side from the conductor of the angle 0 ° Stator of rotating electrical machine. The stator of the rotating electrical machine according to claim 8 or 9 , wherein an angle formed by a conductor in the slot and a conductor protruding from the slot is gradually changed at a protruding end protruding from the slot. . A rotating electrical machine using the stator of the rotating electrical machine according to any one of claims 1 to 10 . An annular stator core having a plurality of slots in the circumferential direction and a protruding end portion of a conductor segment that protrudes outward from the slot by inserting a leg portion of the conductor segment into the slot and connecting the different ones to each other In a method of manufacturing a stator of a rotating electric machine having a stator winding wound around a stator core,
Wherein the stator windings when wound on the stator core, the gap between the innermost circumference side of the stator windings of the opening edge and the slot of the slot definitive radially innermost side of the slot A first step of fitting a non-magnetic coil fixing member having a slot insertion portion smaller than a radial interval of the gap and shorter than a thickness in a stacking direction of the stator core, and an inclined portion ;
A conductor segment having a bent portion that is bent radially inward of the conductor segment and contacts the inclined portion is sequentially inserted on the radially outer side of the coil fixing member fitted in the first step. A second step to
And a third step of inserting a linear conductor segment into the slot after the insertion of the conductor segment having the bent portion in the second step is completed.

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