JP6522272B1 - Rotating electrical machine and method of manufacturing the same - Google Patents

Abstract

A rotating electrical machine according to the present invention comprises an armature and a rotor, wherein the rotor is opened radially outward, and a rotor core in which a plurality of axially extending slots are circumferentially formed, A field winding housed in each of the slots, and a plurality of split wedges axially arranged and housed on the opening side of each of the slots and fixedly holding the field winding in the slots; And a holding ring mounted on both axial ends of the rotor core. The plurality of split wedges include a composite wedge, and the composite wedge includes a main body portion for holding the field winding, and a conductive body held by the main body portion and through which an eddy current flows, and the main body portion The conductive body is made of a nonmagnetic material of higher strength than the conductive body, and the conductive body is made of a metal of higher conductivity than the main body portion.

Description

  The present invention relates to a rotating electrical machine having a cylindrical rotor and a method of manufacturing the same, and more particularly to a rotor structure of a rotating electrical machine applied to a turbine generator.

  In a conventional generator in which a field current is passed through a field winding of a rotor to form an electromagnet, the field winding is disposed in a groove-shaped slot provided in a rotor core. In addition to the field winding, the slot also includes a damper bar through which an eddy current induced by the magnetic flux from the armature winding flows, an insulator that insulates between the damper bar and the field winding, and a slot content A wedge for preventing scattering is installed (see, for example, Patent Document 1).

  In conventional generators, insulators, damper bars and wedges are placed on the outer periphery of the rotor core relative to the field windings. The scattering prevention wedge has a function of electrically conducting between the damper bars in the axial center portion of the rotor core, and electrically conducting the damper bar and the holding ring at the axial end portion of the rotor core. Therefore, the wedge is made of a highly conductive metal, such as a BeCu alloy. In addition, having high conductivity means that it is easy to conduct electricity.

JP, 2001-86685, A

  Since the wedge is made of highly conductive metal, it has been necessary to make the wedge radially thicker to withstand the centrifugal forces acting on the field windings, insulation and damper bars. As a result, the distance between the field winding and the armature winding is increased, and a part of the magnetic flux generated in the field winding does not interlink with the armature winding, and the loss in the rotor core Was getting bigger.

  Here, if the wedge is made of a high strength non-magnetic material, such as stainless steel, the wedge can withstand the centrifugal forces acting on the field windings, insulators, and damper bars without radial thickening. . As a result, the distance between the field winding and the armature winding is shortened, and the amount of magnetic flux generated by the field winding interlinking the armature winding increases, and the loss in the rotor core Can be reduced. As a result, the field current can be reduced and the efficiency can be improved. However, high strength non-magnetic materials such as stainless steel have low conductivity. Therefore, the eddy current from the damper bar is less likely to flow through the wedge at the axial center portion and both axial end portions of the rotor core, and heat generation by the wedge is increased, resulting in an increase in eddy current loss.

  The present invention has been made to solve such problems, and it is an object of the present invention to obtain a rotating electrical machine capable of improving efficiency by suppressing heat generation by a wedge due to eddy current and a method of manufacturing the same. .

A rotating electrical machine according to the present invention includes an armature including an armature winding, and a rotor disposed on the inner diameter side of the armature. The rotor is opened radially outward, and has a rotor core in which a plurality of slots extending in the axial direction are circumferentially formed, field windings accommodated in the slots, and the slots, respectively. A plurality of divided wedges axially arranged and stored on the opening side of the rotor, and holding the field winding fixedly in the slot; holding rings mounted on both axial ends of the rotor core; Have. The plurality of split wedges include a composite wedge, and the composite wedge includes a main body portion for holding the field winding, and a conductive body held by the main body portion and through which an eddy current flows, and the main body portion The conductive body is made of a nonmagnetic material of higher strength than the conductive body, and the conductive body is made of a metal of higher conductivity than the main body portion. The body portion includes a split upper wedge and a split lower wedge, and the composite wedge is in a state in which the conductor is held between the split upper wedge and the split lower wedge. A split upper wedge and the split lower wedge are integrated.

  According to the present invention, since the current-carrying member is made of a metal having higher conductivity than the main body, heat generation in the composite wedge due to the eddy current is suppressed. Since the main body is made of a nonmagnetic material having a strength higher than that of the current-carrying member, the thickness can be reduced to prevent scattering of the contents of the slot. Therefore, the position of the field winding in the slot approaches the armature winding, and the field current can be reduced to improve the efficiency.

It is a longitudinal cross-sectional view which shows the rotary electric machine which concerns on Embodiment 1 of this invention. It is a perspective view which shows the rotor in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a principal part cross-sectional view which shows the surroundings of the slot of the rotor in the rotary electric machine of a comparative example. It is a principal part longitudinal cross-sectional view which shows the surroundings of the slot of the rotor in the rotary electric machine of a comparative example. It is a principal part longitudinal cross-sectional view which shows the surroundings of the slot of the rotor in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a longitudinal cross-sectional view which shows the 1st division | segmentation wedge of the rotor in the rotary electric machine which concerns on Embodiment 1 of this invention. It is the end elevation which looked at the 1st division wedge of the rotor in the rotation electrical machinery concerning Embodiment 1 of this invention from the direction of an axis. It is a longitudinal cross-sectional view which shows the 2nd division wedge of the rotor in the rotary electric machine which concerns on Embodiment 1 of this invention. It is the end elevation which looked at the 2nd division wedge of the rotor in the rotation electrical machinery concerning Embodiment 1 of this invention from the axial direction other end side. It is the end elevation which looked at the 2nd division wedge of the rotor in the rotation electrical machinery concerning Embodiment 1 of this invention from one end side in the direction of an axis. It is a principal part disassembled perspective view which shows the surroundings of the slot of the rotor in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a disassembled perspective view which shows the 1st division | segmentation wedge of the rotor in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a disassembled perspective view which shows the 2nd division wedge of the rotor in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a principal part cross-sectional view which shows the surroundings of the slot of the rotor of the embodiment in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a principal part longitudinal cross-sectional view which shows the surroundings of the slot of the rotor of the embodiment in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a principal part longitudinal cross-sectional view which shows the surroundings of the slot of the rotor in the rotary electric machine which concerns on Embodiment 2 of this invention. It is a longitudinal cross-sectional view which shows the 1st division wedge of the rotor in the rotary electric machine which concerns on Embodiment 2 of this invention. It is the end elevation which looked at the 1st division wedge of the rotor in the rotation electrical machinery concerning Embodiment 2 of this invention from the direction of an axis. It is a longitudinal cross-sectional view which shows the 2nd division wedge of the rotor in the rotary electric machine which concerns on Embodiment 2 of this invention. It is the end elevation which looked at the 2nd division wedge of the rotor in the rotation electrical machinery concerning Embodiment 2 of this invention from the axial direction other end side. It is the end elevation which looked at the 2nd division wedge of the rotor in the rotation electrical machinery concerning Embodiment 2 of this invention from one end side in the direction of an axis. It is a principal part longitudinal cross-sectional view which shows the surroundings of the slot of the rotor in the rotary electric machine which concerns on Embodiment 3 of this invention. It is a principal part longitudinal cross-sectional view which shows the surroundings of the slot of the rotor in the rotary electric machine which concerns on Embodiment 4 of this invention. It is a principal part longitudinal cross-sectional view which shows the surroundings of the slot of the rotor in the rotary electric machine which concerns on Embodiment 5 of this invention. It is a principal part longitudinal cross-sectional view which shows the surroundings of the slot of the rotor in the rotary electric machine which concerns on Embodiment 6 of this invention. It is a longitudinal cross-sectional view which shows the 1st division | segmentation wedge of the rotor in the rotary electric machine which concerns on Embodiment 6 of this invention. It is the end elevation which looked at the 1st division wedge of the rotor in the rotation electrical machinery concerning Embodiment 6 of this invention from the direction of an axis. It is a longitudinal cross-sectional view which shows the 2nd division wedge of the rotor in the rotary electric machine which concerns on Embodiment 6 of this invention. It is the end elevation which looked at the 2nd division wedge of the rotor in the rotation electrical machinery concerning Embodiment 6 of this invention from the axial direction other end side. It is the end elevation which looked at the 2nd division wedge of the rotor in the rotary electric machine concerning Embodiment 6 of this invention from one end side in the direction of an axis. It is a principal part longitudinal cross-sectional view which shows the surroundings of the slot of the rotor in the rotary electric machine which concerns on Embodiment 7 of this invention. It is a longitudinal cross-sectional view which shows the 1st lump wedge of the rotor in the rotary electric machine which concerns on Embodiment 7 of this invention. It is a longitudinal cross-sectional view which shows the 2nd massive wedge of the rotor in the rotary electric machine which concerns on Embodiment 7 of this invention. It is a principal part longitudinal cross-sectional view which shows the surroundings of the slot of the rotor in the rotary electric machine which concerns on Embodiment 8 of this invention. It is a longitudinal cross-sectional view which shows the 1st lump wedge of the rotor in the rotary electric machine which concerns on Embodiment 8 of this invention. It is the end elevation which looked at the 1st lump wedge of the rotor in the rotation electrical machinery concerning Embodiment 8 of this invention from the direction of an axis. It is a longitudinal cross-sectional view which shows the 2nd lump wedge of the rotor in the rotary electric machine which concerns on Embodiment 8 of this invention. It is the end elevation which looked at the 2nd lump wedge of the rotor in the rotation electrical machinery concerning Embodiment 8 of this invention from the direction of an axis. It is a longitudinal cross-sectional view which shows the 4th division | segmentation wedge of the rotor in the rotary electric machine which concerns on Embodiment 8 of this invention. It is the end elevation which looked at the 4th division wedge of the rotor in the rotation electrical machinery concerning Embodiment 8 of this invention from the direction of an axis. It is a longitudinal cross-sectional view which shows the inter-wedge connecting conductor of the rotor in the rotary electric machine which concerns on Embodiment 8 of this invention. It is the end elevation seen from the axial direction of the inter-wedge connecting conductor of the rotor in the rotary electric machine which concerns on Embodiment 8 of this invention. It is a principal part longitudinal cross-sectional view which shows the surroundings of the slot of the rotor in the rotary electric machine which concerns on Embodiment 9 of this invention. It is a longitudinal cross-sectional view which shows the 5th division | segmentation wedge of the rotor in the rotary electric machine which concerns on Embodiment 9 of this invention. It is the end elevation which looked at the 5th division wedge of the rotor in the rotation electrical machinery concerning Embodiment 9 of this invention from the direction of an axis.

  Hereinafter, although the rotary electric machine of each embodiment of this invention is demonstrated based on figures, in each figure, the same code | symbol is attached | subjected and demonstrated to an identical or equivalent member and site | part.

Embodiment 1
FIG. 1 is a longitudinal sectional view showing a rotating electrical machine according to Embodiment 1 of the present invention, and FIG. 2 is a perspective view showing a rotor in the rotating electrical machine according to Embodiment 1 of the present invention. In addition, a longitudinal cross-sectional view is a cross-sectional view showing a cross-section including the axial center of the rotation shaft.

  1 and 2, the rotating electrical machine 100 is fixed to the frame 1, the rotating shaft 7 rotatably supported by the frame 1, and the rotating shaft 7, and is rotatably provided inside the frame 1; A rotor 6 having a rotor core 8 and an armature core 4 held by the frame 1 and surrounding and coaxially provided with the frame 1 and a rotor core held by the armature core 4 And an armature 3 having an armature winding 5 for generating an output current by linking magnetic fluxes according to 8. The rotating shaft 7 is connected to a motor (not shown). As a result, the rotor core 8 is given the rotational force of the prime mover through the rotation shaft 7. Furthermore, a gas cooler 2 for cooling a refrigerant of air or hydrogen for suppressing heat generation in a field winding (not shown) attached to the rotor core 8, the armature winding 5, etc. Provided in

  In the rotor core 8, the slots 10 respectively open in the outer peripheral surface of the rotor core 8 so as to extend from one end to the other end of the rotor core 8 in the axial direction with the groove direction as the axial direction. A plurality is provided circumferentially. A field winding, not shown, is located in the slot 10. A wedge is placed in the slot 10 to prevent the popping out of the slot contents such as the field winding due to centrifugal force. Structures (not shown) for coupling field windings disposed in the slots 10 are disposed at both axial ends of the rotor core 8. Metal holding rings 9 for suppressing deformation due to centrifugal force of the structure connecting the field windings are disposed at both axial ends of the rotor core 8.

  In the rotary electric machine 100 configured in this manner, the rotational force of the prime mover is applied to the rotor 6 via the rotary shaft 7. As a result, a rotating magnetic field is applied to the armature winding 5 and an electromotive force is generated in the armature winding 5. Thus, rotary electric machine 100 operates as a generator.

  Here, the rotor structure of the comparative example will be described with reference to FIGS. 3 and 4. FIG. 3 is a cross-sectional view of relevant parts showing the surroundings of the slots of the rotor in the rotating electrical machine of the comparative example, and FIG. 4 is a longitudinal cross-sectional view of the relevant parts showing the surroundings of the slots of the rotor in the rotating electrical machine of the comparative example. In addition, a cross-sectional view is a cross-sectional view which shows the cross section orthogonal to the axial center of a rotating shaft.

  In the rotor of the comparative example, the field winding 11, the insulator 12, and the damper bar 13 are installed in each slot 10 in this order from the inner diameter side. A U-channel 14 is installed on the inner diameter side of the field winding 11 of each slot 10 with the opening directed radially outward, and an axial ventilation path 15 is configured. A wedge is disposed on the outer diameter side of the damper bar 13 of each slot 10 to prevent the field winding 11, the insulator 12, and the damper bar 13 from jumping out. Here, the wedges are a first split wedge 16 installed at the axial center of the slot 10, a second split wedge 17 installed at both axial ends of the slot 10, and a first split wedge of the slot 10. And a plurality of third dividing wedges 18 installed between the second dividing wedge 17 and the second dividing wedge 17. That is, the first divisional wedge 16, the second divisional wedge 17, and the plurality of third divisional wedges 18 are accommodated in a row in the axial direction on the opening side of each slot 10. The radial ventilation passage 20 penetrates the first division wedge 16, the second division wedge 17, the third division wedge 18, the damper bar 13, the insulator 12, and the field winding 11 in a radial direction at a plurality of positions in the axial direction. The axial ventilation passage 15 communicates with the outside.

  The first split wedge 16 is in contact with the damper bars 13 axially separated at the center in the axial direction, and electrically shorts the damper bars 13. The second split wedge 17 is in contact with the damper bar 13 and the holding ring 9 and electrically shorts the damper bar 13 and the holding ring 9. Thereby, the eddy current induced by the magnetic flux from the armature winding 5 and flowing through the damper bar 13 disposed on the other side in the axial direction is, as shown by the arrow 19 in FIG. Flow to the damper bar 13 installed on one side in the axial direction. Furthermore, eddy currents flowing through the damper bar 13 flow through the second dividing wedge 17 to the retaining ring 9. The eddy current that has flowed to the retaining ring 9 flows from the retaining ring 9 to the damper bar 13 through the second split wedge 17 installed in the other slot 10. As a result, a path of eddy current through the retaining ring 9 is formed in the rotor, and heat generation due to the eddy current of the rotor including the first split wedge 16 and the second split wedge 17 is suppressed. As described above, since the first split wedge 16 and the second split wedge 17 are required to have high conductivity, the first split wedge 16 and the second split wedge 17 are made of a highly conductive metal such as a BeCu alloy. The conductivity required for the first split wedge 16 and the second split wedge 17 is 20% IACS according to the conductivity standard IACS (International Annealed Copper Stanraed). On the other hand, since the third split wedge 18 does not need to be conductive, it is made of a high strength nonmagnetic material such as stainless steel. The material strength required for the third split wedge 18 is defined by a 0.2% proof stress and is 196 MPa or more. Thus, the third split wedge 18 is suppressed from generating heat due to the magnetic flux from the armature winding 5.

  Next, a rotor structure according to the first embodiment will be described with reference to FIGS. 5 to 10. FIG. 5 is an essential part longitudinal cross sectional view showing around a slot of a rotor in a rotary electric machine according to Embodiment 1 of the present invention, and FIG. 6 is a first view of a rotor in the rotary electric machine according to Embodiment 1 of the present invention. FIG. 7 is an end view of a first split wedge of a rotor in a rotary electric machine according to Embodiment 1 of the present invention when viewed from the axial direction; FIG. 8 is an embodiment of the present invention 9 is a longitudinal sectional view showing a second split wedge of the rotor in the rotary electric machine according to 1, and FIG. 9 is a view of the second split wedge of the rotor in the rotary electric machine according to Embodiment 1 of the present invention from the other end side in the axial direction 10 is an end view of the second split wedge of the rotor in the rotary electric machine according to Embodiment 1 of the present invention as viewed from one end in the axial direction, and FIG. 11 is a view of Embodiment 1 of the present invention. Main part showing around the slot of the rotor in the electric rotating machine concerned FIG. 12 is an exploded perspective view showing a first split wedge of the rotor in the rotary electric machine according to Embodiment 1 of the present invention, and FIG. 13 is a rotor in the rotary electric machine according to Embodiment 1 of the present invention It is a disassembled perspective view which shows 2nd division | segmentation wedge.

  In the rotor 6 according to the first embodiment, as shown in FIGS. 5 and 12, the first split wedge 30 is replaced with the first split wedge 16 and installed at the axial center of the slot 10, and the second split wedge The rotor of the comparative example is configured in the same manner as the rotor of the comparative example except that 35 is replaced with the second split wedge 17 and installed at both axial ends of the slot 10. In the first embodiment, the wedge is divided into a first division wedge 30, a second division wedge 35, and a third division wedge 18.

  The first split wedge 30 is a composite wedge comprising a first split upper wedge 31, a first split lower wedge 32, and a conductive metal plate 33, as shown in FIGS. 6, 7 and 13. . The first divided lower wedge 32 is manufactured in a substantially rectangular parallelepiped in which a recess 32 a whose axial direction is the groove direction is formed at the center of the upper surface. The conductive metal plate 33 is formed in a rectangular flat plate shape, is disposed in the recess 32 a, and folds the protruding portions from the first divided lower wedge 32 to both axial directions, and both axial end faces of the first divided lower wedge 32 Extending along the lower surface of the first divided lower wedge 32. At this time, the mounting regions of the conductive metal plate 33 at both end surfaces in the axial direction of the first divided lower wedge 32 are formed in the recess, and the both end surfaces in the axial direction of the first divided lower wedge 32 and the conductive metal plate The 33 are very close. Similarly, the mounting area of the conductive metal plate 33 on the lower surface of the first divided lower wedge 32 is formed in a recess, and the lower surface of the first divided lower wedge 32 and the conductive metal plate 33 are flush . The first upper split wedge 31 has a convex portion 31a which can be fitted to the concave portion 32a at the center of the lower surface.

  In the state where the first divided wedge 30 has the convex portion 31a fitted in the recessed portion 32a and the conductive metal plate 33 is held between the first divided upper wedge 31 and the first divided lower wedge 32. The first divided upper wedge 31 and the first divided lower wedge 32 are integrally formed. At this time, both end faces in the axial direction of the first divided upper wedge 31 and the first divided lower wedge 32 are flush with each other. Here, the first divided upper wedge 31 and the first divided lower wedge 32 integrated with each other form a main body portion, and the conductive metal plate 33 functions as a conductive body.

  Also in the first split wedge 30, radial ventilation paths 20 are formed in the first split upper wedge 31, the first split lower wedge 32, and the conductive metal plate 33. The first split upper wedge 31 and the first split lower wedge 32 are made of a high strength nonmagnetic material, such as stainless steel. The conductive metal plate 33 is made of a material having conductivity equal to or higher than that of the first split wedge 16 and the second split wedge 17 in the comparative example, such as copper or a copper alloy. Thus, the first divided upper wedge 31 and the first divided lower wedge 32 are made of a nonmagnetic material having higher strength than the conductive metal plate 33. On the other hand, the conductive metal plate 33 is made of a metal that is more conductive than the first divided upper wedge 31 and the first divided lower wedge 32.

  As shown in FIGS. 8 to 10 and 14, the second split wedge 35 has a second split upper wedge 36, a second split lower wedge 37, a first conductive metal plate 38a, and a second conductive plate. And a metal plate 38b. The second split lower wedge 37 is manufactured in a substantially rectangular parallelepiped whose axial length is longer than that of the second split upper wedge 36, and a recess 37a whose axial direction is the groove direction is formed in the upper surface central portion. The first conductive metal plate 38a is formed in a rectangular flat plate shape and disposed in the recess 37a, and the protrusions in the axial direction from the second divided lower wedge 37 are folded back to form the second divided lower wedge 37 in the axial direction. It extends along the end faces and is disposed along the lower surface of the second divided lower wedge 37. At this time, the mounting regions of the first conductive metal plate 38a at both end surfaces in the axial direction of the second divided lower wedge 37 are formed in the recess, and both the end surfaces in the axial direction of the second divided lower wedge 37 and the first The conductive metal plate 38a is flush. Similarly, the mounting area of the first conductive metal plate 38a on the lower surface of the second divided lower wedge 37 is formed in a recess, and the lower surface of the second divided lower wedge 37 and the first conductive metal plate 38a are flush with each other. It has become.

  The second upper split wedge 36 has a convex portion 36 a which can be fitted to the concave portion 37 a at the center of the lower surface. The second conductive metal plate 38b is formed in a rectangular flat plate shape and is disposed on the convex portion 36a, and folds the projecting portion from the second divided upper wedge 36 to one end side in the axial direction, and the shaft of the second divided upper wedge 36 It is arranged along one end face of the direction. At this time, the mounting area of the second conductive metal plate 38b at one end face in the axial direction of the second divided upper wedge 36 is formed in the recess, and one axial end face of the second divided upper wedge 36 and the second end The conductive metal plate 38b is flush. Then, the second split wedge 35 fits the convex portion 36a into the recess 37a, and the first conductive metal plate 38a and the second conductive metal plate 38b form the second split upper wedge 36 and the second split lower wedge 37. And the second divided upper wedge 36 and the second divided lower wedge 37 are integrally configured. At this time, the second divided lower wedge 37 protrudes from the second divided upper wedge 36 to one end in the axial direction, and the other axial end surfaces of the second divided upper wedge 36 and the second divided lower wedge 37 become flush. ing. Here, the integrated second divided upper wedge 36 and the second divided lower wedge 37 form a main body, and the first conductive metal plate 38a and the second conductive metal plate 38b form an electric conductor.

  Also in the second split wedge 35, radial ventilation paths 20 are formed in the second split upper wedge 36, the second split lower wedge 37, the first conductive metal plate 38a, and the second conductive metal plate 38b. The second split upper wedge 36 and the second split lower wedge 37 are made of a high strength nonmagnetic material, such as stainless steel. The first conductive metal plate 38 a and the second conductive metal plate 38 b are made of the same material as the conductive metal plate 33. Thus, the second divided upper wedge 36 and the second divided lower wedge 37 are made of a nonmagnetic material having higher strength than the first conductive metal plate 38 a and the second conductive metal plate 38 b. On the other hand, the first conductive metal plate 38 a and the second conductive metal plate 38 b are made of metal higher in conductivity than the second upper split wedge 36 and the second lower split wedge 37.

  Although two metal plates of the first conductive metal plate 38a and the second conductive metal plate 38b are used, one metal plate is used, and the second divided wedge 35 extends from one end to the axial direction. The protrusion may be divided and folded back and forth. Here, although the second split wedge 35 installed at one axial end of the slot 10 is described, at the other axial end of the slot 10, the second split lower wedge 37 of the second split wedge 35 is It is installed so as to project from the second divided upper wedge 36 to the other end side in the axial direction.

  It is preferable that a portion where the first divisional wedge 30 is divided into the first divisional upper wedge 31 and the first divisional lower wedge 32 be a portion that becomes a compressive load when the rotor 6 receives a centrifugal force during rotation. The first divided upper wedge 31 and the first divided lower wedge 32 are integrated using one of the methods of shrink fit, cold fit, adhesion, welding, brazing, and stir welding. The second split wedge 35 is also similar to the first split wedge 30. As a result, the first split wedge 30 and the second split wedge 35 can be inserted into the slot 10 without separation, and the assembling workability is enhanced.

  Also, the first split wedge 30 and the second split wedge 35 may be integrated by combining any of adhesion, welding, brazing and stir welding with either of the shrink fit and the cold fit. Thereby, even if a temperature distribution is generated in the first split wedge 30 and the second split wedge 35 such that the joint by the shrink fit or the cold fit occurs, the joint by any one of adhesion, welding, brazing and stirring. Is maintained. As a result, it is possible to suppress the generation of metal powder due to the wear of the conductive metal and the wedge caused by the disjoined portion of the first split wedge 30 and the second split wedge 35.

  In the rotor 6 configured in this manner, the damper bar 13 in which the protruding portion of the conductive metal plate 33 from the main body portion of the first divided wedge 30 is axially separated at the axial center portion And the damper bars 13 are electrically shorted. The protrusions of the first conductive metal plate 38a and the second conductive metal plate 38b from the main body of the second split wedge 35 are in contact with the damper bar 13 and the holding ring 9, and the damper bar 13 and the holding ring 9 Are electrically shorted. At this time, since the lower surface of the first divided lower wedge 32 of the first divided wedge 30 and the conductive metal plate 33 are flush with each other, the conductive metal plate 33 and the damper bar 13 are in surface contact with each other. Electrical connection is ensured. Since the lower surface of the second divided lower wedge 37 of the second divided wedge 35 and the first conductive metal plate 38a are flush with each other, the first conductive metal plate 38a and the damper bar 13 are in surface contact with each other. Electrical connection is secured. Since the upper surface of the protrusion from the second divided upper wedge 36 to the one end side in the axial direction of the second divided lower wedge 37 and the first conductive metal plate 38 a are flush with each other, the first conductive metal plate 38 a The surface contact with the inner peripheral surface of the retaining ring 9 ensures the electrical connection between the two. Since the axial direction one end surface of the second divided upper wedge 36 and the second conductive metal plate 38 b are flush with each other, the second conductive metal plate 38 b and the axial other end surface of the holding ring 9 are in surface contact with each other. And the electrical connection between the two is ensured. Furthermore, the contact area between the first conductive metal plate 38a and the holding ring 9 of the second conductive metal plate 38b is increased, and the contact resistance is reduced.

  In the rotor of the comparative example, since the eddy current flowing in the damper bar 13 is caused to flow to the first split wedge 16 and the second split wedge 17, the first split wedge 16 and the second split wedge 17 are made of high BeCu alloy or the like. It was made of a conductive material. However, it is difficult to simultaneously achieve high conductivity and high strength, and the thickness of the first split wedge 16 and the second split wedge 17 is increased to secure the scattering prevention function of the contents of the slot. As a result, the distance between the field winding 11 and the armature winding 5 is increased, and the amount of magnetic flux generated from the field winding 11 intersecting the armature winding 5 is reduced.

  In the first embodiment, the first split wedge 30 is a composite wedge including the first split upper wedge 31, the first split lower wedge 32, and the conductive metal plate 33. The conductive metal plate 33 is made of a metal which is more conductive than the first divided upper wedge 31 and the first divided lower wedge 32. Since the conductive metal plate 33 has a conductive function, the first divided upper wedge 31 and the first divided lower wedge 32 holding the conductive metal plate 33 do not need to have high conductivity. The same applies to the second split wedge 35. Therefore, the characteristics required for the first divided upper wedge 31, the first divided lower wedge 32, the second divided upper wedge 36, and the second divided lower wedge 37 can be specialized in strength. Thereby, the first divided upper wedge 31, the first divided lower wedge 32, the second divided upper wedge 36 and the second divided lower wedge 37 are divided into the conductive metal plate 33, the first conductive metal plate 38a and the second conductive property. It can be made of a material of higher strength than the metal plate 38b. Therefore, the material of the first divided upper wedge 31, the first divided lower wedge 32, the second divided upper wedge 36 and the second divided lower wedge 37 is used as the material of the first divided wedge 16 and the second divided wedge 17. It is possible to use a nonmagnetic material, such as stainless steel, which has a higher strength than the existing BeCu alloy. As a result, the thickness of the first split wedge 30 and the second split wedge 35 can be reduced. Thereby, the scattering of the contents of the slot can be prevented, and the field winding 11 in the slot 10 can be installed on the outer peripheral portion of the rotor core 8. Therefore, the distance between the field winding 11 and the armature winding 5 is shortened, and a larger amount of magnetic flux generated from the field winding 11 interlinks with the armature winding 5, so the set output current is It is possible to reduce the field current supplied to the field winding 11 in order to obtain the same. As a result, field copper loss is reduced and efficiency is improved. In addition, the conductive metal plate 33, the first conductive metal plate 38a and the second conductive metal plate 38b are the first split upper wedge 31, the first split lower wedge 32, the second split upper wedge 36 and the second split lower. Since it is made of a conductive material higher than the wedge 37, for example, copper, copper alloy or the like, heat generation in the first split wedge 30 and the second split wedge 35 is suppressed, and eddy current loss can be reduced.

  The first split wedge 30 is accommodated at the axial center of the slot 10, and the second split wedge 35 is accommodated at both axial ends of the slot 10. Therefore, the eddy current induced by the magnetic flux from the armature winding 5 and flowing through the damper bar 13 disposed on the other side in the axial direction is, as shown by the arrow 19 in FIG. The current flows through the conductive metal plate 33 to the damper bar 13 installed on one side in the axial direction. Further, the eddy current flowing through the damper bar 13 flows to the holding ring 9 through the first conductive metal plate 38 a and the second conductive metal plate 38 b of the second split wedge 35. The eddy current that has flowed to the retaining ring 9 passes through the first conductive metal plate 38a and the second conductive metal plate 38b of the second split wedge 35 installed in the other slot 10 from the retaining ring 9 to a damper bar. It flows to 13.

  Since the first divided wedge 30 is accommodated at the axial center, the conduction between the damper bars 13 at the axial center is maintained by the conductive metal plate 33 of the first divided wedge 30. Since the second split wedge 35 is accommodated at both axial end portions, the conduction between the damper bar 13 and the holding ring 9 at the axial opposite end portions is achieved by the first conductive metal plate 38 a of the second split wedge 35 a second conductive Metal plate 38b. In addition, the first divided upper wedge 31 and the first divided lower wedge 32 are made of a nonmagnetic material having higher strength than the conductive metal plate 33. Similarly, the second divided upper wedge 36 and the second divided lower wedge 37 are made of nonmagnetic material of higher strength than the first conductive metal plate 38a and the second conductive metal plate 38b. Therefore, even if the thicknesses of the first divided upper wedge 31, the first divided lower wedge 32, the second divided upper wedge 36 and the second divided lower wedge 37 are reduced, it is possible to prevent the scattering of the contents of the slot. As a result, the position of the field winding 11 in the slot 10 approaches the armature winding 5 to enable reduction of the field current, thereby improving the efficiency.

  The first split wedge 30 and the first split upper wedge 31 and the first split lower wedge 30 are in a state in which the conductive metal plate 33 is held between the first split upper wedge 31 and the first split lower wedge 32 and held. It is configured integrally with the wedge 32. Therefore, when the rotor 6 rotates, the centrifugal force acts to press the conductive metal plate 33 against the first divided upper wedge 31 via the first divided lower wedge 32. Thereby, the occurrence of a situation where the conductive metal plate 33 is detached from the first split wedge 30 is suppressed. The same applies to the second split wedge 35.

  In the first embodiment, the axial ventilation passage 15 is provided only at the bottom of the slot 10. However, as shown in FIGS. 14 and 15, the radial direction position of the axial ventilation passage 21 is changed. A plurality of field windings 11 may be formed. In this case, as shown in FIG. 15, the radial ventilation passage 20 is formed in the first divided wedge 30, the damper bar 13, the insulator 12, and the field winding 11 at the axial central portion of the rotor core 8. The plurality of axial ventilation paths 21 communicate with the outside. At this time, the radial air passage 20 does not necessarily have to be formed in the second split wedge 35 and the third split wedge 18. As described above, the rotor according to the first embodiment can be applied to both the radial direction ventilation type and the axial direction ventilation type rotary electric machine. The rotors according to the other embodiments can also be applied to either a radial ventilation type or an axial ventilation type rotating electrical machine.

  In the first embodiment, the conductive metal plate 33 is provided on the contact surface of the conductive metal plate 33, the first conductive metal plate 38a, and the second conductive metal plate 38b with the damper bar 13 or the holding ring 9. The contact resistance may be reduced by plating a conductive metal higher than the first conductive metal plate 38a and the second conductive metal plate 38b, such as gold and silver. In the other embodiments as well, high conductivity metal plating such as gold and silver may be applied to the electrical contact surface of the conductive metal plate with another member such as a damper bar.

  Further, in the first embodiment, the first split wedge 30 and the second split wedge 35 may be either shrink fit, cold fit, adhesion, welding, brazing, stir welding, or any one method, or adhesion and bonding, respectively. And either welding, brazing or stir welding are integrated together. Also in the other embodiments, the first split wedge and the second split wedge are each similarly a shrink fit, a cold fit, a bonding, a welding, a brazing, a method of stirring, a method of bonding, or a bonding, respectively. Any one of welding, brazing and stir welding is used in combination and integrated.

  Further, in the first embodiment, the first division wedge 30 and the second division wedge 35 are divided into upper and lower divisions as compression load when receiving centrifugal force when the rotor rotates. Also in the embodiment, it is desirable that the place where the first division wedge and the second division wedge are divided up and down be the load of compression when receiving the centrifugal force when the rotor rotates.

Second Embodiment
FIG. 16 is an essential part longitudinal sectional view showing around a slot of a rotor in a rotary electric machine according to Embodiment 2 of the present invention, and FIG. 17 is a first view of a rotor in a rotary electric machine according to Embodiment 2 of the present invention. FIG. 18 is an end view of a first split wedge of a rotor in a rotary electric machine according to Embodiment 2 of the present invention when viewed from the axial direction; FIG. 19 is an embodiment of the present invention 20 is a longitudinal sectional view showing a second split wedge of the rotor in the rotating electrical machine according to No. 2; FIG. 20 is a view from the other end side of the second split wedge of the rotor in the rotating electrical machine according to Embodiment 2 of the present invention FIG. 21 is an end view of a second split wedge of a rotor in a rotary electric machine according to Embodiment 2 of the present invention as viewed from one end side in the axial direction.

  In the second embodiment, as shown in FIG. 16, the first split wedge 40 is installed at the axial center of the slot 10 instead of the first split wedge 30, and the second split wedge 45 is a second split wedge 35. The second embodiment is configured in the same manner as the first embodiment except that it is installed at both axial ends of the slot 10 instead. In the second embodiment, the wedge is divided into a first divisional wedge 40, a second divisional wedge 45, and a third divisional wedge 18.

  The first split wedge 40 is a composite wedge including a first split upper wedge 41, a first split lower wedge 42, and a conductive metal plate 43, as shown in FIGS. 17 and 18. The first divided lower wedge 42 is manufactured in a substantially rectangular parallelepiped in which an axially extending convex portion 42 a is formed at the center of the upper surface. The conductive metal plate 43 is formed in a rectangular flat plate shape, is disposed in the convex portion 42 a, folds the protruding portions from the first divided lower wedge 42 to both axial directions, and both ends of the first divided lower wedge 42 in the axial direction It extends along the surface and is disposed along the lower surface of the first divided lower wedge 42. At this time, the mounting regions of the conductive metal plate 43 at both end surfaces in the axial direction of the first divided lower wedge 42 are formed in the recess, and the both end surfaces in the axial direction of the first divided lower wedge 42 and the conductive metal plate 43 is coplanar. Similarly, the mounting area of the conductive metal plate 43 on the lower surface of the first divided lower wedge 42 is formed in a recess, and the lower surface of the first divided lower wedge 42 and the conductive metal plate 43 are flush . The first upper split wedge 41 has a concave portion 41a which can be fitted to the convex portion 42a at the center of the lower surface.

  The first split wedge 40 is configured by fitting the concave portion 41 a to the convex portion 42 a and integrating the first split upper wedge 41 and the first split lower wedge 42. At this time, both end faces in the axial direction of the first divided upper wedge 41 and the first divided lower wedge 42 are flush with each other. Here, the integrated first divided upper wedge 41 and the first divided lower wedge 42 become the main body, and the conductive metal plate 43 becomes the current-carrying member. The method for integrating the first divided upper wedge 41 and the first divided lower wedge 42 is the same as that of the first embodiment.

  Also in the first split wedge 40, radial ventilation paths 20 are formed in the first split upper wedge 41, the first split lower wedge 42, and the conductive metal plate 43. The first divided upper wedge 41 and the first divided lower wedge 42 are made of a high strength nonmagnetic material, such as stainless steel. The conductive metal plate 43 is made of a material having the same conductivity as the conductive metal plate 33, such as copper or a copper alloy.

  The second split wedge 45 is a composite wedge comprising a second split upper wedge 46, a second split lower wedge 47, and a conductive metal plate 48, as shown in FIGS. The second split lower wedge 47 is longer in axial length than the second split upper wedge 46, and an axially extending protrusion 47a is formed at the center of the upper surface. The conductive metal plate 48 is formed in a rectangular flat plate shape and disposed in the convex portion 47 a, and the protrusion in the axial direction other side from the second divided lower wedge 47 is folded back to form the second divided lower wedge 47 in the axial direction. It extends along the other end face and is disposed along the lower surface of the second divided lower wedge 47. At this time, the placement area of the conductive metal plate 48 at the other axial end face of the second divided lower wedge 47 is formed in the recess, and the other axial end face of the second divided lower wedge 47 and the conductive metal plate The 48 are flush. Similarly, the mounting area of the conductive metal plate 48 on the lower surface of the second divided lower wedge 47 is formed in a recess, and the lower surface of the second divided lower wedge 47 and the conductive metal plate 48 are flush .

  In addition, the conductive metal plate 48 is disposed on the convex portion 47 a, and folds the protruding portion from the second divided lower wedge 47 in the axial direction to one side along the one end surface of the second divided lower wedge 47 in the axial direction. Extend. Furthermore, the conductive metal plate 48 is disposed along the upper surface, the one end surface in the axial direction, and the lower surface of the protrusion to the one axial end side of the second divided lower wedge 47. At this time, the conductive metal plate 48 of one end face in the axial direction of the second divided lower wedge 47 and the upper surface, the axial one end surface and the lower surface of the projecting portion to one axial direction side of the second divided lower wedge 47 A region is formed in the recess, and the conductive metal plate 48 is disposed flush with the second divided lower wedge 47.

  The second upper split wedge 46 has a concave portion 46a that can be fitted to the convex portion 47a at the center of the lower surface. Then, the second divided wedge 45 is configured by fitting the concave portion 46 a to the convex portion 47 a and integrating the second divided upper wedge 46 and the second divided lower wedge 47. At this time, the second divided lower wedge 47 protrudes from the second divided upper wedge 46 in the axial direction to one end side, and the other axial end surfaces of the second divided upper wedge 46 and the second divided lower wedge 47 become flush. ing. Here, the integrated second divided upper wedge 46 and the second divided lower wedge 47 form a main body, and the conductive metal plate 48 becomes an electric conductor. The method of integrating the second divided upper wedge 46 and the second divided lower wedge 47 is the same as that of the first embodiment.

  Also in the second split wedge 45, radial ventilation paths 20 are formed in the second split upper wedge 46, the second split lower wedge 47, and the conductive metal plate 48. The second split upper wedge 46 and the second split lower wedge 47 are made of a high strength nonmagnetic material, such as stainless steel. The conductive metal plate 48 is made of the same material as the conductive metal plate 43. Here, the second split wedge 45 installed at one axial end of the slot 10 is described. However, at the other axial end of the slot 10, the second split wedge 45 is a second split lower wedge 47. It is installed so as to project from the second divided upper wedge 46 to the other end side in the axial direction.

  In the second embodiment, since the conductive metal plate 43 has a conductive function, the first split wedge 40 holding the conductive metal plate 43 and the first split lower wedge 42 hold the first split wedge 40. And the need for high conductivity is eliminated. The same applies to the second split wedge 45. Therefore, the characteristics required for the first divided upper wedge 41, the first divided lower wedge 42, the second divided upper wedge 46, and the second divided lower wedge 47 can be specialized in strength. Thereby, the first divided upper wedge 41, the first divided lower wedge 42, the second divided upper wedge 46 and the second divided lower wedge 47 can be made of nonmagnetic material having higher strength than the conductive metal plate 43 and the conductive metal plate 48. A material such as stainless steel can be used.

Therefore, also in the second embodiment, the same effect as that of the first embodiment can be obtained.
Further, according to the second embodiment, since the conductive metal plates 43 and 48 are disposed on the convex portion 42 a of the first divided lower wedge 42 and the convex portion 47 a of the second divided lower wedge 47, conductive metal The distance between the plates 43, 48 and the armature winding 5 is reduced. Thereby, the eddy current induced in the conductive metal plates 43 and 48 by the magnetic flux from the armature winding 5 is increased, and the heat generation of the rotor core 8 due to the eddy current is suppressed.

Third Embodiment
FIG. 22 is an essential part longitudinal cross sectional view showing around a slot of a rotor in a rotary electric machine according to Embodiment 3 of the present invention.

  In the third embodiment, as shown in FIG. 22, the third split wedge 30A is replaced with each of the third split wedges 18 and installed in the slot 10, except that the damper bar 13 is omitted. The configuration is the same as that of the first embodiment. In the third embodiment, the wedge is divided into a first division wedge 30, a second division wedge 35, and a third division wedge 30A.

The third split wedge 30A is a compound wedge configured in the same manner as the first split wedge 30 except that the axial length is short.
In the third embodiment, all the wedges installed in each of the slots 10 of the rotor core 8 are constituted by a composite wedge of the first split wedge 30, the second split wedge 35, and the third split wedge 30A. Therefore, the same effect as the first embodiment can be obtained.

  According to the third embodiment, the second split wedges 35 are installed at both axial ends of the slot 10 of the rotor core 8, and the first split wedge 30 and the third split wedge 30 A are interposed between the second split wedges 35. The slots 10 are arranged in a row. Thereby, the conductive metal plate 33 of the first split wedge 30 and the third split wedge 30A and the first conductive metal plate 38a and the second conductive metal plate 38b of the second split wedge 35 electrically contact each other. In the state, they are arranged in a line in the axial direction. Thus, the electrically conductive metal plate 33, the first electrically conductive metal plate 38a and the second electrically conductive metal plate 38b arranged in a line in the axial direction in the state of being in electrical contact with each other function as the damper bar 13. The damper bar 13 can be omitted. As a result, the distance between the field winding 11 and the armature winding 5 is further shortened, and more magnetic flux generated from the field winding 11 interlinks with the armature winding 5. As a result, since the field current supplied to the field winding 11 can be reduced to obtain the set output current, the field copper loss can be reduced and the efficiency can be further improved.

  In the third embodiment, the first split wedge 30, the second split wedge 35, and the third split wedge 30A are integrated by combining adhesion and any of welding, brazing, and stir welding, respectively. May be In this case, the division upper wedge and the division lower wedge are positioned and fixed with high accuracy by bonding the division upper wedge and the division lower wedge by adhesion prior to the joining step by welding, brazing or stir welding. it can. This enhances the accuracy of the shape after joining by any of welding, brazing and stir welding. As a result, the unevenness in the axial direction on the axial end faces of the first divisional wedge 30, the second divisional wedge 35 and the third divisional wedge 30A is reduced. Therefore, the contact areas between the first split wedge 30 and the third split wedge 30A, between the third split wedge 30A, and between the third split wedge 30A and the second split wedge 35 are expanded, and a conductive metal plate is produced. Heat generation is reduced at the contact portion 33 and at the contact portion between the conductive metal plate 33 and the first conductive metal plate 38a.

Fourth Embodiment
FIG. 23 is an essential part longitudinal cross sectional view showing around a slot of a rotor in a rotary electric machine according to Embodiment 4 of the present invention.

  In the fourth embodiment, as shown in FIG. 23, the third split wedge 40A is replaced with each of the third split wedges 18 and installed in the slot 10, except that the damper bar 13 is omitted. The configuration is the same as that of the second embodiment. In the fourth embodiment, the wedge is divided into a first divisional wedge 40, a second divisional wedge 45, and a third divisional wedge 40A.

The third split wedge 40A is a compound wedge configured in the same manner as the first split wedge 40 except that the axial length is short.
In the fourth embodiment, all the wedges installed in each of the slots 10 of the rotor core 8 are constituted by a composite wedge of the first split wedge 40, the second split wedge 45, and the third split wedge 40A. Therefore, the same effect as the second embodiment can be obtained.

  According to the fourth embodiment, the second split wedge 45 is installed at both axial ends of the slot 10 of the rotor core 8, and the first split wedge 40 and the third split wedge 40A are interposed between the second split wedges 45 by one. The slots 10 are arranged in a row. Thereby, the conductive metal plates 43 of the first split wedge 40 and the third split wedge 40A and the conductive metal plates 48 of the second split wedge 45 are arranged in a line in the axial direction in a state where they are in electrical contact with each other. ing. Thus, the conductive metal plates 43 and the conductive metal plates 48 arranged in a line in the axial direction in a state of being in electrical contact with each other function as the damper bar 13 and the damper bar 13 can be omitted. . As a result, the distance between the field winding 11 and the armature winding 5 is further shortened, and more magnetic flux generated from the field winding 11 interlinks with the armature winding 5. As a result, since the field current supplied to the field winding 11 can be reduced to obtain the set output current, the field copper loss can be reduced and the efficiency can be further improved.

In the fourth embodiment, as in the third embodiment, the first divisional wedge 40, the second divisional wedge 45, and the second divisional wedge 45 are used by combining adhesion and any of welding, brazing, and stir welding. The third split wedges 40A may be integrated respectively.
Also, in the other embodiments, as in the third and fourth embodiments, the first division wedge and the second division are combined using adhesion and any of welding, brazing and stir welding. Each wedge may be integrated.

Embodiment 5
FIG. 24 is an essential part longitudinal cross sectional view showing around a slot of a rotor in a rotary electric machine according to Embodiment 5 of the present invention.

  In the fifth embodiment, as shown in FIG. 24, the first massive wedge 50 is replaced with the first split wedge 30 and installed at the axial center of the slot 10, and the second massive wedge 51 is placed in the second split wedge 35. The third embodiment is configured in the same manner as the third embodiment except that it is installed at both axial ends of the slot 10 instead. In the fifth embodiment, the wedge is divided into a first massive wedge 50, a second massive wedge 51, and a third split wedge 30A.

  The first massive wedge 50 and the second massive wedge 51 are made in one piece of a highly conductive material similar to the conductive metal plate 33, for example, copper or a copper alloy.

  In the fifth embodiment, the conductive metal plates 33 of the first massive wedge 50, the second massive wedge 51, and the third split wedge 30A are arranged in a line in the axial direction in a state of being in electrical contact with each other. There is. Thus, the first massive wedge 50, the second massive wedge 51, and the conductive metal plate 33 axially arranged in a line in the state of being in electrical contact with each other function as the damper bar 13, and the damper bar 13 can be omitted. Therefore, also in the fifth embodiment, the same effect as the third embodiment can be obtained.

  In addition, since the first massive wedge 50 and the second massive wedge 51 are made of a highly conductive metal in a lump, the contact resistance between the first massive wedge 50 and the rotor core 8 is reduced, The contact resistance between the second massive wedge 51 and the retaining ring 9 is reduced. As a result, the eddy current flowing on the surface of the rotor core 8 can be made to flow more to the conductive metal plate 33 functioning as a damper bar. As a result, the heat generation of the rotor core 8 due to the eddy current can be suppressed.

  Here, on the contact surfaces of the first massive wedge 50 and the second massive wedge 51 with the conductive metal plate 33 and the retaining ring 9, a conductive metal higher in electrical conductivity than the first massive wedge 50 and the second massive wedge 51, for example Gold, silver, etc. may be plated to reduce the contact resistance.

  In the fifth embodiment, in the rotor of the third embodiment, the first massive wedge 50 is installed at the axial center of the slot 10 instead of the first split wedge 30, and the second massive wedge 51 is In the rotor of the fourth embodiment, the first massive wedge 50 is replaced with the first split wedge 40 and the axial center of the slot 10 is replaced with the split wedge 35 instead of the split wedge 35. And the second massive wedge 51 may be installed at both axial ends of the slot 10 instead of the second split wedge 45.

Sixth Embodiment
FIG. 25 is an essential part longitudinal cross sectional view showing around a slot of a rotor in a rotary electric machine according to Embodiment 6 of the present invention, and FIG. 26 is a first view of a rotor in a rotary electric machine according to Embodiment 6 of the present invention FIG. 27 is an end view of a first split wedge of a rotor in a rotary electric machine according to Embodiment 6 of the present invention when viewed from the axial direction; FIG. 28 is an embodiment of the present invention And FIG. 29 is a view of the second split wedge of the rotor in the rotary electric machine according to Embodiment 6 of the present invention when viewed from the other end side in the axial direction. FIG. 30 is an end view of a second split wedge of a rotor in a rotary electric machine according to Embodiment 6 of the present invention as viewed from one end side in the axial direction.

In the sixth embodiment, as shown in FIG. 25, the first split wedge 60 is installed at the axial center of the slot 10 in place of the first split wedge 30, and the second split wedge 65 is a second split wedge. 35 are installed at both axial ends of the slot 10, and the plurality of third split wedges 60A are replaced with the third split wedge 30A and between the first split wedge 60 and the second split wedge 65 of the slot 10 is set up. In the sixth embodiment, the wedge is divided into a first divisional wedge 60, a second divisional wedge 65, and a third divisional wedge 60A.
The other configuration is the same as that of the third embodiment.

  The first split wedge 60 is a composite wedge including a first split upper wedge 61, a first split lower wedge 62, and a conductive metal plate 63, as shown in FIGS. The first divided lower wedge 62 is manufactured in a prism of a parallelogram vertical cross section inclined to one side in the axial direction, and a recess 62a whose axial direction is the groove direction is formed in the upper surface central portion. The conductive metal plate 63 is formed in a rectangular flat plate shape, is disposed in the recess 62 a, and folds the protruding portions from the first divided lower wedge 62 to both axial directions, and both axial end faces of the first divided lower wedge 62 Extending along the lower surface of the first divided lower wedge 62. At this time, the mounting regions of the conductive metal plate 63 at both end surfaces in the axial direction of the first divided lower wedge 62 are formed in the recess, and the both end surfaces in the axial direction of the first divided lower wedge 62 and the conductive metal plate 63 is a flush. Similarly, the mounting area of the conductive metal plate 63 on the lower surface of the first divided lower wedge 62 is formed in a recess, and the lower surface of the first divided lower wedge 62 and the conductive metal plate 63 are flush . The first upper split wedge 61 has a convex portion 61 a which can be fitted to the concave portion 62 a at the center of the lower surface. Here, exposed surfaces on both sides in the axial direction of the conductive metal plate 63 are inclined surfaces 64.

  The first split wedge 60 is configured by fitting the convex portion 61 a into the recess 62 a and integrating the first split upper wedge 61 and the first split lower wedge 62. Here, the first divided upper wedge 61 and the first divided lower wedge 62 that are integrated become a main body, and the conductive metal plate 63 becomes an electric conductor.

Also in the first split wedge 60, radial ventilation paths 20 are formed in the first split upper wedge 61, the first split lower wedge 62, and the conductive metal plate 63. The first divided upper wedge 61 and the first divided lower wedge 62 are made of a high strength nonmagnetic material such as stainless steel. The conductive metal plate 63 is made of the same material as the conductive metal plate 33, for example, copper or a copper alloy.
The third split wedge 60A is a compound wedge configured in the same manner as the first split wedge 60 except that the axial length is short. Also in the third divided wedge 60A, exposed surfaces on both sides in the axial direction of the conductive metal plate 63 are inclined surfaces 64.

  The second split wedge 65 is, as shown in FIGS. 28 to 30, a second split upper wedge 66, a second split lower wedge 67, a first conductive metal plate 68a, and a second conductive metal plate 68b. And a composite wedge comprising The second divided lower wedge 67 is manufactured in a rectangular column whose axial length is longer than that of the second divided upper wedge 66, and the other axial end face of the rectangular parallelepiped is inclined to one side in the axial direction. Is formed at the center of the upper surface. The inclination angle of the other axial end surface of the second divided lower wedge 67 is the same as the inclination angle of the other axial end surface of the first divided lower wedge 62. The first conductive metal plate 68 a is formed in a rectangular flat plate shape and is disposed in the recess 67 a, and folds the protruding portions from the second divided lower wedge 67 to both axial directions to form the second divided lower wedge 67 in the axial direction. It extends along the end faces and is disposed along the lower surface of the second divided lower wedge 67. At this time, the mounting regions of the first conductive metal plate 68 a at both end surfaces in the axial direction of the second divided lower wedge 67 are formed in the recess, and both the end surfaces in the axial direction of the second divided lower wedge 67 and the first The conductive metal plate 68a is flush. Similarly, the mounting area of the first conductive metal plate 68a on the lower surface of the second divided lower wedge 67 is formed in a recess, and the lower surface of the second divided lower wedge 67 and the first conductive metal plate 68a are flush with each other. It has become.

  The second upper split wedge 66 has a convex portion 66a that can be fitted to the concave portion 67a at the center of the lower surface. The second conductive metal plate 68 b is formed in a rectangular flat plate shape and disposed in the convex portion 66 a, and folds the protruding portion from the second divided upper wedge 66 to one end side in the axial direction, and the axis of the second divided upper wedge 66 It is arranged along one end face of the direction. At this time, the mounting area of the second conductive metal plate 68b at one end face in the axial direction of the second divided upper wedge 66 is formed in the recess, and one axial end face of the second divided upper wedge 66 and the second end The conductive metal plate 68b is flush. The second split wedge 65 is configured by fitting the convex portion 66a into the concave portion 67a and integrating the second split upper wedge 66 and the second split lower wedge 67. At this time, the second divided lower wedge 67 protrudes from the second divided upper wedge 66 to one end in the axial direction. Here, the integrated second divided upper wedge 66 and the second divided lower wedge 67 form the main body, and the first conductive metal plate 68a and the second conductive metal plate 68b form the current-carrying member. An exposed surface on the other side in the axial direction of the second divided upper wedge 66 of the first conductive metal plate 68 a is an inclined surface 69.

  Also in the second split wedge 65, radial ventilation paths 20 are formed in the second split upper wedge 66, the second split lower wedge 67, the first conductive metal plate 68a, and the second conductive metal plate 68b. The second upper split wedge 66 and the second lower split wedge 67 are made of a high strength nonmagnetic material, such as stainless steel. The first conductive metal plate 68 a and the second conductive metal plate 68 b are made of the same material as the conductive metal plate 63. Although two metal plates of the first conductive metal plate 68a and the second conductive metal plate 68b are used, one metal plate is used, and the second divided wedge 65 extends from one end to the axial direction. The protrusion may be divided and folded back and forth. Here, although the second split wedge 65 installed at one axial end of the slot 10 is described, at the other axial end of the slot 10, the second split wedge 65 is a second split lower wedge 67 It is installed so as to project from the second divided upper wedge 66 to the other axial end side.

  The first division wedge 60, the second division wedge 65, and the third division wedge 60A are divided into upper and lower portions at locations that become compressive loads when the rotor 6 receives a centrifugal force during rotation. The first divisional wedge 60, the second divisional wedge 65, and the third divisional wedge 60A are integrated, for example, in the same manner as in the first embodiment.

  In the rotor configured in this manner, the second split wedges 65 are installed at both axial ends of the slot 10, and the first split wedge 60 and the third split wedge 60A are arranged in a row between the second split wedges 65. They are arranged in slots 10. In the first divided wedge 60 and the third divided wedge 60A, exposed surfaces on both sides in the axial direction of the conductive metal plate 63 are inclined surfaces 64. Further, in the second divided wedge 65, the exposed surface on the third divided wedge 60A side of the first conductive metal plate 68a is the inclined surface 69. The inclination angles of these inclined surfaces 64 and 69 are the same.

  Thereby, the conductive metal plate 63 of the first divided wedge 60 and the conductive metal plate 63 of the third divided wedge 60A are in electrical contact with each other. The conductive metal plates 63 of the adjacent third divided wedges 60A are in electrical contact with each other. The conductive metal plate 63 of the adjacent third split wedge 60A and the first conductive metal plate 68a of the second split wedge 65 are in electrical contact with each other. Thus, the conductive metal plates 63, the first conductive metal plate 68a and the second conductive metal plate 68b arranged in a line in the axial direction in the state of being in electrical contact with each other function as the damper bar 13. The damper bar 13 can be omitted. As a result, the distance between the field winding 11 and the armature winding 5 is shortened, and more magnetic flux generated from the field winding 11 interlinks with the armature winding 5. As a result, since the field current supplied to the field winding 11 can be reduced to obtain the set output current, the field copper loss is reduced and the efficiency is improved.

  In addition, since the conductive metal plate 63, the first conductive metal plate 68a and the second conductive metal plate 68b have a conductive function, the first division wedge 60, the second division wedge 65, and the third division wedge 65 are used. The main body of the wedge 60A can be made of a high strength nonmagnetic material, and the thickness can be reduced. As a result, the distance between the field winding 11 and the armature winding 5 is shortened, and more magnetic flux generated from the field winding 11 interlinks with the armature winding 5. As a result, since the field current supplied to the field winding 11 can be reduced to obtain the set output current, the field copper loss is reduced and the efficiency is improved.

  Further, the inclined surfaces 64 of the conductive metal plates 63 of the first divided wedge 60 and the third divided wedge 60A adjacent to each other overlap in the radial direction and are in surface contact. The inclined surfaces 64 of the conductive metal plates 63 of the adjacent third divided wedges 60A overlap in the radial direction, and are in surface contact. The inclined surfaces 64 and 69 of the conductive metal plate 63 of the adjacent third split wedge 60A and the first conductive metal plate 68a of the second split wedge 65 overlap in the radial direction and are in surface contact. Thus, the centrifugal force during rotation of the rotor raises the contact pressure of these electrical connections. Thereby, the contact resistance of the electrical connection portion between the conductive metal plate 63, the first conductive metal plate 68a and the second conductive metal plate 68b is reduced, and the heat generation at the contact portion is suppressed.

  The first division wedge 60, the second division wedge 65, and the third division wedge 60A according to the sixth embodiment are the same as the first division wedge 30, the second division wedge 35, and the third division wedge in the third embodiment. It is the structure equivalent to what comprised the exposed surface of the conductive metal plate of 30A in the inclined surface. Therefore, even if the exposed surfaces of the conductive metal plate of the first split wedge 40, the second split wedge 45, and the third split wedge 40A in the fourth embodiment are formed as inclined surfaces, similar effects can be obtained.

Embodiment 7
31 is a longitudinal sectional view of relevant parts showing around a slot of a rotor in a rotary electric machine according to Embodiment 7 of the present invention, and FIG. 32 is a first view of a rotor in a rotary electric machine according to Embodiment 7 of the present invention. FIG. 33 is a longitudinal sectional view showing a second massive wedge of a rotor in a rotary electric machine according to a seventh embodiment of the present invention.

  In the seventh embodiment, as shown in FIG. 31, the first massive wedge 70 is installed at the axial central portion of the slot 10 instead of the first split wedge 60, and the second massive wedge 72 is a second split wedge 65. The sixth embodiment is configured in the same manner as the sixth embodiment except that it is installed at both axial ends of the slot 10 instead. In the seventh embodiment, the wedge is divided into a first massive wedge 70, a second massive wedge 72, and a third split wedge 60A.

The first massive wedge 70 is made of one high-conductivity material similar to the conductive metal plate 63, for example, copper or a copper alloy. The inclined surface 71 is formed on the lower side of both axial end faces of the first massive wedge 70, as shown in FIG.
The second massive wedge 72 is made in one piece of a highly conductive material similar to the conductive metal plate 63, for example, copper or a copper alloy. An inclined surface 73 is formed on the lower side of the other axial end surface of the second massive wedge 72, as shown in FIG.

  In the seventh embodiment, the conductive metallic plates 63 of the first massive wedge 70, the second massive wedge 72, and the third split wedge 60A are arranged in a line in the axial direction in electrical contact with each other. There is. Thus, the first massive wedge 70, the second massive wedge 72, and the conductive metal plate 63 axially arranged in a line in the state of being in electrical contact with each other function as the damper bar 13, and the damper bar 13 can be omitted. Therefore, also in the seventh embodiment, the same effect as the sixth embodiment can be obtained.

  In addition, since the first massive wedge 70 and the second massive wedge 72 are made of a highly conductive metal in a lump, the contact resistance between the first massive wedge 70 and the rotor core 8 is reduced, The contact resistance between the second massive wedge 72 and the retaining ring 9 is reduced. As a result, the eddy current flowing on the surface of the rotor core 8 can be made to flow more to the conductive metal plate 63 functioning as a damper bar. As a result, the heat generation of the rotor core 8 due to the eddy current can be suppressed.

  Further, the inclined surfaces 71 and 64 of the adjacent first massive wedge 70 and the conductive metal plate 63 of the third divided wedge 60A overlap in the radial direction, and are in surface contact. The inclined surfaces 64 of the conductive metal plates 63 of the adjacent third divided wedges 60A overlap in the radial direction, and are in surface contact. The inclined surfaces 64 and 73 of the conductive metal plate 63 of the third divided wedge 60A and the second massive wedge 72 adjacent to each other overlap in the radial direction and are in surface contact. Thus, the centrifugal force during rotation of the rotor raises the contact pressure of these electrical connections. Thereby, the electrical connection portion between the first massive wedge 70 and the conductive metal plate 63 of the third split wedge 60A, the electrical connection portion between the conductive metal plates 63 of the third split wedge 60A, and the third split wedge The contact resistance of the electrical connection portion between the conductive metal plate 63 and the second massive wedge 72 is reduced, and the heat generation at the contact portion is suppressed.

  In the seventh embodiment, the third split wedge 60A may be replaced with a third split wedge in which the exposed surface of the conductive metal plate 43 of the third split wedge 40A in the fourth embodiment is an inclined surface. Good.

  Here, on the contact surfaces of the first massive wedge 70 and the second massive wedge 72 with the conductive metal plate 63 and the retaining ring 9, a conductive metal higher in electrical conductivity than the first massive wedge 70 and the second massive wedge 72, for example Gold, silver, etc. may be plated to reduce the contact resistance.

Eighth Embodiment
FIG. 34 is an essential part longitudinal cross sectional view showing around a slot of a rotor in a rotary electric machine according to Embodiment 8 of the present invention, and FIG. 35 is a first example of a rotor in the rotary electric machine according to Embodiment 8 of the present invention And FIG. 36 is an end view of a first massive wedge of a rotor in a rotary electric machine according to an eighth embodiment of the present invention as viewed from the axial direction, and FIG. 37 is an embodiment of the present invention. And FIG. 38 is an end elevation view of a second massive wedge of a rotor in an electrical rotating machine according to an eighth embodiment of the present invention as viewed from the axial direction. FIG. 39 is a longitudinal sectional view showing a fourth split wedge of a rotor in a rotary electric machine according to Embodiment 8 of the present invention, and FIG. 40 is a sectional view of the rotor in the rotary electric machine according to Embodiment 8 of the present invention. An end view of the four-piece wedge as viewed from the axial direction FIG. 41 is a longitudinal cross-sectional view showing inter-wedge connecting conductors of a rotor in a rotary electric machine according to Embodiment 8 of the present invention, and FIG. 42 is a diagram showing inter-wedges of a rotor in a rotary electric machine according to Embodiment 8 of the present invention It is the end elevation which looked at a connecting conductor from the direction of an axis.

  In the eighth embodiment, as shown in FIG. 34, the first massive wedge 74 is installed at the axial center of the slot 10, and the second massive wedge 76 is installed at both axial ends of the slot 10. Further, a plurality of fourth divided wedges 77 are disposed in a row in the axial direction between the first massive wedge 74 and the second massive wedge 76. Furthermore, the first massive wedge 74 and the fourth split wedge 77 are connected with each other, and the fourth split wedge 77 is connected with each other, and the fourth split wedge 77 and the second massive wedge 76 are further connected using the inter-wedge connecting conductor 75 ing. The remaining structure is similar to that of the seventh embodiment. In the eighth embodiment, the wedge is divided into a first massive wedge 74, a second massive wedge 76, and a fourth split wedge 77.

  The first massive wedge 74 is made of one high-conductivity material similar to the conductive metal plate 63, for example, copper or a copper alloy. As shown in FIGS. 35 and 36, the recess 79 is formed on the lower side of the axial end faces of the first massive wedge 74 with the hole direction as the axial direction. The recess 79 has a hole shape having a rectangular cross section orthogonal to the axial direction, and the upper surface of the recess 79 is an inclined surface 79 a that gradually approaches the lower surface side in the depth direction of the recess 79. The first massive wedge 74 is configured in the same manner as the first massive wedge 70 except that a recess 79 is formed.

  The second massive wedge 76 is made of one high conductivity material similar to the conductive metal plate 63, for example, copper or a copper alloy. A recess 80 is formed on the lower side of the end face of the second massive wedge 76 opposite to the fourth split wedge 77, as shown in FIGS. The recess 80 has a hole shape in which the cross section orthogonal to the axial direction is rectangular, and the upper surface of the recess 80 is an inclined surface 80 a that gradually approaches the lower surface side in the depth direction of the recess 80. The second massive wedge 76 is configured in the same manner as the second massive wedge 72 except that a recess 80 is formed.

  The fourth split wedge 77 is a composite wedge comprising a fourth split upper wedge 81, a fourth split lower wedge 82, and a conductive metal plate 78, as shown in FIGS. A recess 83 is formed on the lower side of both axial end faces of the fourth divided lower wedge 82. The recess 83 has a hole shape in which the cross section orthogonal to the axial direction is rectangular, and the upper surface of the recess 83 is an inclined surface that gradually approaches the lower surface side in the depth direction of the recess 83. The conductive metal plate 78 is formed in a rectangular flat plate shape, and is sandwiched between the fourth divided upper wedge 81 and the fourth divided lower wedge 82 in a state of projecting in both axial directions. The protrusions of the conductive metal plate 78 extend downward along the axial end faces of the fourth lower wedge 82 and are drawn into the depressions 83. The conductive metal plate 78 drawn into the recess 83 is disposed along the inclined surface of the recess 83. Here, the lower surface of the portion of the conductive metal plate 78 disposed along the inclined surface of the recess 83 is the inclined surface 78a. The fourth divided upper wedge 81 and the fourth divided lower wedge 82 are made of a high strength nonmagnetic material, such as stainless steel. The conductive metal plate 78 is made of the same material as the conductive metal plate 63, for example, copper or a copper alloy.

  The first massive wedge 74, the second massive wedge 76, and the fourth split wedge 77 have the same cross-sectional shape orthogonal to the axial direction. The recess 79, the recess 80, and the recess 83 in which the end of the conductive metal plate 78 is disposed have the same hole shape. The first massive wedge 74 and the fourth divided wedge 77 are disposed such that the recess 79 and the recess 83 face each other. The second massive wedge 76 and the fourth divided wedge 77 are disposed such that the recess 80 and the recess 83 face each other.

  The fourth split wedge 77 is configured by integrating the fourth split upper wedge 81 and the fourth split lower wedge 82. Here, the integrated fourth split upper wedge 81 and the fourth split lower wedge 82 become a main body portion, and the conductive metal plate 78 becomes a current-carrying body.

  The inter-wedge connecting conductor 75 is made of the same material as the conductive metal plate 78, for example, copper or a copper alloy. The inter-wedge connecting conductor 75 can be fitted with the recess 79, the recess 80, and the recess 83 in the state where the end of the conductive metal plate 78 is disposed, as shown in FIGS. 41 and 42. It is formed in the following shape. The upper surfaces of both axial end portions of the inter-wedge connecting conductor 75 radially overlap the inclined surfaces 79a, 80a, 78a of the recess 79, the recess 80, and the recess 83 with the end of the conductive metal plate 78 disposed. It becomes the inclined surface 75a which surface-contacts in the state.

  The first massive wedge 74, the second massive wedge 76, and the fourth split wedge 77, which are configured in this manner, are axially installed in a row in the slot 10 with the inter-wedge connecting conductor 75 interposed. At this time, both ends of the inter-wedge connecting conductor 75 are fitted in the recesses 79, 80 and 83. Therefore, the inclined surfaces 75a, which are the upper surfaces of both axial end portions of the inter-wedge connecting conductor 75, overlap in the radial direction with the recesses 79, 80 and 83, the inclined surfaces 79a, 80a, 78a and are in surface contact. As a result, the first massive wedge 74, the second massive wedge 76, and the fourth divided wedge 77 arranged in a line in the slot 10 are electrically connected.

  In the eighth embodiment, the conductive metal plates 78 of the first massive wedge 74, the second massive wedge 76, and the fourth split wedge 77 are axially connected in an electrical contact with each other by the inter-wedge connecting conductor 75. It is arranged in one row. Thus, the first massive wedge 74, the second massive wedge 76, and the conductive metal plate 78 axially arranged in a line in the state of being in electrical contact with each other function as the damper bar 13, and the damper bar 13 can be omitted. Therefore, also in the eighth embodiment, the same effect as the seventh embodiment can be obtained.

  Also, since the first massive wedge 74 and the second massive wedge 76 are made of a highly conductive metal in a lump, the contact resistance between the first massive wedge 74 and the rotor core 8 is reduced, The contact resistance between the second massive wedge 76 and the retaining ring 9 is reduced. As a result, more eddy current flowing on the surface of the rotor core 8 can be made to flow to the conductive metal plate 78 functioning as a damper bar. As a result, the heat generation of the rotor core 8 due to the eddy current can be suppressed.

  In addition, the upper surface of the inner wall surface of the recess 79 formed in the first massive wedge 74 is an inclined surface 79 a that is gradually displaced toward the inner diameter side in the depth direction of the recess 79. The upper surface of the inner wall surface of the recess 80 formed in the second massive wedge 76 is an inclined surface 80 a that is gradually displaced toward the inner diameter side in the depth direction of the recess 80. The lower surface of the conductive metal plate 78 disposed on the upper surface of the inner wall surface of the recess 83 formed in the fourth divided wedge 77 is an inclined surface 78 a that is gradually displaced toward the inner diameter side in the depth direction of the recess 83. Both axial end portions of the inter-wedge connecting conductor 75 are fitted in the recesses 79, 80 and 83, and the inclined surface 75a overlaps the inclined surfaces 79a, 80a and 78a in the radial direction to be in surface contact. Then, the centrifugal force during rotation of the rotor 6 raises the contact surface pressure of these electrical connections. Thereby, the electrical connection portion between the first massive wedge 74 and the inter-wedge connecting conductor 75, the electrical connection portion between the conductive metal plate 78 of the fourth split wedge 77 and the inter-wedge connecting conductor 75, and the second massive wedge The contact resistance of the electrical connection portion between 76 and the inter-wedge connecting conductor 75 is reduced, and the heat generation at the contact portion is suppressed.

  In the eighth embodiment described above, instead of the fourth split wedge 77, a third split wedge provided with an inclined hollow on the exposed surface of the conductive metal plate 43 of the third split wedge 40A in the fourth embodiment is used. It is also good.

  Here, on the contact surface of the first massive wedge 74 with the inter-wedge connection conductor 75, the contact surface of the second massive wedge 76 with the inter-wedge connection conductor 75, and the contact surface of the second massive wedge 76 with the holding ring 9. The contact resistance may be reduced by plating a conductive metal higher than the first massive wedge 74 and the second massive wedge 76, such as gold and silver. In addition, the contact surface of the fourth divided wedge 77 with the inter-wedge connecting conductor 75 of the conductive metal plate 85 is plated with a conductive metal higher than the conductive metal plate 85, for example, gold, silver, etc. May be reduced.

Embodiment 9
43 is a main part longitudinal cross sectional view showing around a slot of a rotor in a rotary electric machine according to Embodiment 9 of the present invention, and FIG. 44 is a fifth view of a rotor in the rotary electric machine according to Embodiment 9 of the present invention. FIG. 45 is an end elevation view of a fifth division wedge of a rotor in a rotary electric machine according to a ninth embodiment of the present invention, as viewed from the axial direction.

  In the ninth embodiment, as shown in FIG. 43, the fourth split wedge 77 is installed at the axial center of the slot 10, and the fifth split wedge 84 is installed at both axial ends of the slot 10. Furthermore, a plurality of fourth split wedges 77 are disposed between the fourth split wedge 77 disposed at the center and the fifth split wedges 84 disposed at both ends. The fourth divided wedges 77 are electrically connected by inter-wedge connecting conductor 75, and the fourth divided wedge 77 and the fifth divided wedge 84 are electrically connected by inter-wedge connected conductor 75. The remaining structure is similar to that of the eighth embodiment. In the ninth embodiment, the wedge is divided into a fourth dividing wedge 77 and a fifth dividing wedge 84.

  The fifth split wedge 84 is a composite wedge comprising a fifth split upper wedge 88, a fifth split lower wedge 87, and a conductive metal plate 85, as shown in FIGS. A recess 86 is formed on the lower side of the end face of the fifth lower dividing wedge 87 opposite to the fourth dividing wedge 77. The recess 86 has a hole shape having a rectangular cross section orthogonal to the axial direction, and the upper surface of the recess 86 is an inclined surface that gradually approaches the lower surface side in the depth direction of the recess 86. The conductive metal plate 85 is formed in a rectangular flat plate shape, and is sandwiched between the fifth divided upper wedge 88 and the fifth divided lower wedge 87 in a state of projecting in both axial directions. One protrusion of the conductive metal plate 85 extends downward along the end face of the fifth lower wedge 87 and is drawn into the recess 86. The conductive metal plate 85 drawn into the recess 86 is disposed along the inclined surface of the recess 86. Here, the lower surface of the portion of the conductive metal plate 85 disposed along the inclined surface of the recess 86 is the inclined surface 85 a. The fifth upper split wedge 88 and the fifth lower split wedge 87 are made of a high-strength nonmagnetic material such as stainless steel. The conductive metal plate 85 is made of the same material as the conductive metal plate 63, for example, copper or a copper alloy. The electrical connection between the fifth split wedge 84 and the retaining ring 9 is configured in the same manner as the second split wedge 45.

  The fourth split wedge 77 and the fifth split wedge 84 have the same cross-sectional shape orthogonal to the axial direction. The recess 83 in which the end of the conductive metal plate 78 is disposed and the recess 86 in which the end of the conductive metal plate 85 is disposed have the same hole shape. The fourth split wedges 77 are arranged such that the depressions 83 face each other. The fourth divisional wedge 77 and the fifth divisional wedge 84 are disposed such that the depression 83 and the depression 86 face each other.

  The fifth split wedge 84 is configured by integrating a fifth split upper wedge 88 and a fifth split lower wedge 87. Here, the fifth divided upper wedge 88 and the fifth divided lower wedge 87 integrated with each other form a main body, and the conductive metal plate 85 functions as a current-carrying member.

  In the ninth embodiment, the conductive metal plates 78 of the fourth split wedge 77, and the conductive metal plate 78 of the fourth split wedge 77 and the conductive metal plate 85 of the fifth split wedge 84 are connected between the wedges. The conductors 75 are arranged in a line in the axial direction in electrical contact with each other. Thus, the conductive metal plate 78 of the fourth split wedge 77 and the conductive metal plate 85 of the fifth split wedge 84 arranged in a line in the axial direction in electrical contact with each other serve as the damper bar 13. It functions and the damper bar 13 can be omitted. Therefore, also in the ninth embodiment, the same effect as the eighth embodiment can be obtained.

  In addition, the lower surface of the conductive metal plate 78 disposed on the upper surface of the inner wall surface of the recess 83 formed in the fourth divided wedge 77 becomes an inclined surface 78 a that is gradually displaced toward the inner diameter side in the depth direction of the recess 83 There is. The lower surface of the conductive metal plate 85 disposed on the upper surface of the inner wall surface of the recess 86 formed in the fifth divided wedge 84 is an inclined surface 85 a that is gradually displaced toward the inner diameter side in the depth direction of the recess 86. Both axial end portions of the inter-wedge connecting conductor 75 are fitted in the recesses 83 and 86, and the inclined surface 75a overlaps the inclined surfaces 78a and 85a in the radial direction to be in surface contact. Then, the centrifugal force during rotation of the rotor 6 raises the contact surface pressure of these electrical connections. Thus, the electrical connection between the conductive metal plate 78 of the fourth split wedge 77 and the inter-wedge connection conductor 75 and the electrical connection between the conductive metal plate 85 of the fifth split wedge 84 and the inter-wedge connection conductor 75 The contact resistance of the part is reduced, and the heat generation at the contact part is suppressed.

  In the above ninth embodiment, instead of the fourth split wedge 77, a third split wedge provided with an inclined hollow on the exposed surface of the conductive metal plate 43 of the third split wedge 40A in the fourth embodiment is used. It is also good.

  Here, the contact surface of the conductive metal plate 78 of the fourth division wedge 77 with the inter-wedge connection conductor 75, the contact surface of the fifth division wedge 84 with the inter-wedge connection conductor 75 of the conductive metal plate 85, and the fifth The contact surface of the dividing wedge 84 with the holding ring 9 of the conductive metal plate 85 is plated with a conductive metal higher than the conductive metal plates 78 and 85, such as gold and silver, to reduce the contact resistance. It is also good.

  Although the generator is described in each of the above embodiments, the present invention is not limited to the generator, and can be applied to a rotating electrical machine such as a motor or a generator motor.

  Reference Signs List 3 armature, 5 armature winding, 6 rotor, 8 rotor core, 9 holding ring, 10 slots, 11 field winding, 18 third split wedge, 30, 40, 60 first split wedge (composite wedge , 30A, 40A, 60A third split wedge (composite wedge), 31, 41, 61 first split upper wedge (main body), 32, 42, 62 first split lower wedge (main body), 33, 43, 48, 63, 78, 85 Conductive metal plate (electrically conductive body), 35, 45, 65 Second split wedge (composite wedge), 36, 46, 66 Second split upper wedge (body portion), 37, 47, 67 2nd division lower wedge (body part), 38a, 68a 1st conductive metal plate (electric conduction body), 38b, 68b 2nd conductive metal plate (electric conduction body), 50, 70, 74 1st lump wedge (division wedge ), 51, 72, 76 second lump Rust (split wedge), 64, 69, 75a, 78a, 80a, 85a inclined surface, 75 inter-wedge connecting conductor, 77 fourth split wedge (composite wedge), 81 first split upper wedge (body portion), 82 First split lower wedge (main body), 84 Fifth split wedge (composite wedge), 87 Second split upper wedge (main body), 88 First split lower wedge (main body).

Claims (15)

And armature comprising an armature winding,
And a rotating element which is arranged on the inner diameter side of the armature,
The rotor includes a rotor core in which slots that open radially outwardly, and extending in the axial direction is formed with a plurality of circumferentially, a field winding which is housed in each of said slots, said slots each stored and arranged in the axial direction on the opening side, and the field plurality of divided bitterness Vito the winding is fixed and held in the slot, retaining ring mounted to both axial ends of the rotor core of , Including
The plurality of split wedge includes a composite bitterness beauty,
The composite bitterness beauty includes a main body portion for holding the field winding, held in the main body, energizing body eddy current flows, and
The body portion is made of a nonmagnetic material of a high strength Ri by the energizing member,
The energizing body is fabricated by highly conductive metal Ri by said body portion,
The body portion comprises a split upper wedge and a split lower wedge,
The composite wedge is formed by integrating the upper division wedge and the lower division wedge in a state where the current-carrying member is held between the upper division wedge and the lower division wedge . Electric. Concave portion for the groove direction and the axial direction is formed on the lower surface of the split on the bitterness beauty, protrusions extending in the axial direction is formed on the upper surface of the divided lower grass beauty
The division on bitterness Vito the divided lower grass beauty is fitted with the concave portion and the convex portion, and integrally while being held sandwiched between the above-mentioned energization body the recessed portion and the projecting portion The rotating electrical machine according to claim 1, wherein The composite bitterness beauty is rotating electric machine according to claim 1 or claim 2 wherein is housed in only the respective axially central portion of the slot and the axial ends. All of the plurality of split wedge is the composite bitterness beauty,
The composite bitterness beauty is rotating electric machine according to claim 1 or claim 2, wherein said energizing member is accommodated and arranged in the axial direction in a row in each of the slots in a state of being electrically connected to each other. The plurality of split wedge, said slots each axially central portion and are housed in axially opposite end portions, the body portion by Ri highly conductive metals produced clot grass Vito, of the slot are accommodated except respective axially central portion and axially opposite end portions the composite bitterness Vito comprises,
The massive grass Vito the composite bitterness beauty is claim is housed in axially aligned in a row in each of the slot in a state where the bulk grass Biot and the energization bodies are electrically connected to each other 1 Or the rotary electric machine of Claim 2 . Electrical connections split wedge between adjacent of said plurality of divided bitterness beauty is, according to claims 3, which is configured on the inclined surface to surface contact in a state of overlapping in a radial direction to any one of claims 5 Electric rotating machine. Further comprising a wedge between the connection conductors disposed respectively between the composite bitterness beauty adjacent,
The respective electrical connection between the composite bitterness beauty the energizing body and the wedge connection between conductors of rotating electrical machine according to claim 4, characterized in that configured on the inclined surface to surface contact in a state of overlapping in the radial direction. Further comprising a wedge between the connection conductors disposed respectively between between adjacent said bulk grass Vito the composite bitterness arbitration, and adjacent the composite bitterness beauty,
While electrical connections, and the respective electrical connection between the current supply element and the wedge connection between conductors of the composite bitterness beauty is overlapped in the radial direction between the massive grass Vito the wedge connection between conductors The rotating electrical machine according to claim 5 , wherein the rotating electrical machine is configured in an inclined surface in surface contact. And armature comprising an armature winding,
And a rotating element which is arranged on the inner diameter side of the armature,
The rotor includes a rotor core in which slots that open radially outwardly, and extending in the axial direction is formed with a plurality of circumferentially, a field winding which is housed in each of said slots, said slots each stored and arranged in the axial direction on the opening side, and the field plurality of divided bitterness Vito the winding is fixed and held in the slot, retaining ring mounted to both axial ends of the rotor core of , Including
The plurality of split wedge includes a composite bitterness beauty,
The composite bitterness beauty includes a main body portion for holding the field winding, held in the main body, energizing body eddy current flows, and
The body portion is made of a nonmagnetic material of a high strength Ri by the energizing member,
The energizing body is fabricated by highly conductive metal Ri by said body portion,
The compound wedge is housed only in the axial center and the axial ends of each of the slots;
A rotating electrical machine further comprising a damper bar electrically connecting the composite wedge housed only in an axial center portion and both axial end portions . The body portion is provided with divided on bitterness Vito, divided under grass Vito, a,
Said energizing member is held sandwiched between the divided on bitterness Vito the divided lower grass Vito,
Protrusion of the energization of the main body or colleagues, the rotary electric machine according to claim 9, wherein contacting the Danpaba over the surface. The I energization body remote highly conductive metal, the rotary electric machine according to any one of the electrical connections claims 1 to 10 which is coated on the other members of the energizing member. The bulk grass Biyo remote highly conductive metal, the rotary electric machine according to claim 5, characterized in that coated on the electrical connection with another member of said bulk grass beauty. The method for manufacturing a rotating electrical machine according to any one of claims 1 to 8 and claim 12 , wherein the division is performed by any one method of shrink fitting, cold fitting, adhesion, welding, brazing, and stir welding. method of manufacturing a rotary electric machine integrating the upper grass Vito the divided lower grass Vito. In the method of manufacturing a rotating electrical machine according to any one of claims 1 to 8 and claim 12, any one of shrink fit and cold fit and any one of adhesion, welding, brazing and stir welding is used. to method of manufacturing a rotary electric machine integrating the split on bitterness Vito the divided lower grass Vito. The method of manufacturing a rotary electric machine as claimed in any one of claims 8 and claims 12, an adhesive, welding, and any of the brazing and stir welding, a combination of, the division on bitterness Vito method of manufacturing a rotary electric machine integrating the split under grass Vito.

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