JP2014042422A - Rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary electric machine capable of downsizing a terminal board in which terminals for electrically connecting phase windings drawn out of a stator are embedded.SOLUTION: A rotary electric machine 1 includes: a rotor 15 including a plurality of pairs of magnetic poles arrayed in a peripheral direction; a stator 20 arranged oppositely to the rotor 15 in a diameter direction and including a stator core 30 having a plurality of slots 31 arrayed in the peripheral direction and a stator winding 40 comprising at least three-phase phase windings a to l wound around the slots 31; and a terminal board 60 in which first to sixth terminals 71 to 76 for electrically connecting the phase windings a to 1 drawn out of the stator 20 are embedded. At least one-end parts a1 to l1 of the respective phase windings a to l are drawn out of the slots 31 adjacent in the peripheral direction of the stator core 30 to the same direction of an axial direction, and end parts to be inter-phase crossovers 45 out of end parts of the respective phase windings a to l are joined to the first to sixth terminals 71 to 76 of the terminal board 60.

Description

  The present invention relates to a rotating electrical machine used as an electric motor or a generator in a vehicle, for example.

  As a conventional rotating electric machine, a rotor having a plurality of pairs of magnetic poles arranged in the circumferential direction, a stator core having a plurality of slots arranged in the circumferential direction and opposed to the rotor in the radial direction; and A stator having a stator winding formed of a phase winding of at least three phases wound around a slot is generally known.

  In Patent Document 1, both ends of each of a plurality of phase windings drawn from the rear side coil end are used in order to reduce troublesome routing work and wiring work on the coil end of the lead wire of the phase winding. It is disclosed to use a relay circuit (hereinafter referred to as a “terminal block”) configured so that a three-phase circuit is constructed when connecting lead wires from the terminal. The terminal block used here is formed by insert molding a plurality of insert conductors in a resin molded body, and is formed in a flat ring shape.

JP 2010-104081 A

  Incidentally, the rotating electrical machine disclosed in Patent Document 1 is configured such that lead wires from both ends of a plurality of phase windings drawn from the rear side coil end are distributed over the entire circumferential direction of the coil end. ing. Therefore, the terminal block in which the insert conductor for joining predetermined lead wires is insert-molded is formed in a ring shape so as to correspond to the entire circumferential direction of the coil end, and there is a problem that the terminal block is increased in size.

  The present invention has been made in view of the above circumstances, and provides a rotating electrical machine capable of miniaturizing a terminal block in which a terminal for electrically connecting a phase winding drawn from a stator is embedded. Is a problem to be solved.

  The present invention, which has been made to solve the above problems, includes a rotor (15) having a plurality of pairs of magnetic poles arranged in the circumferential direction, and is arranged in the circumferential direction so as to be opposed to the rotor (15) in the radial direction. A stator core (30) having a plurality of slots (31) and a stator winding (40) comprising at least three phase windings (a to l) wound around the slot (31). And a terminal block (60) in which terminals (71 to 76) for electrically connecting the phase windings (a to l) drawn from the stator (20) are embedded, In which at least one end (a1 to l1) of each of the phase windings (a to l) is the same in the axial direction from the slot (31) adjacent in the circumferential direction of the stator core (30). Of the ends of each of the phase windings (a to l), Characterized in that become ends between connecting wire (45) is joined to said terminal (71 to 76) of the terminal block (60).

  According to the present invention, at least one end of each phase winding is drawn in the same axial direction from a slot adjacent in the circumferential direction of the stator core, and becomes an interphase connecting wire among the ends of each phase winding. The end is joined to the terminal on the terminal block. That is, the stator winding of the present invention is configured such that at least one end of each phase winding is gathered at one place in a predetermined range in the circumferential direction of the stator core. Thereby, the circumferential direction length of the terminal to which the edge part used as the interphase connection line of each phase winding is joined, and the circumferential direction length of the terminal block in which this terminal is embedded can be made small. Therefore, the terminal block in which the terminal for electrically connecting the phase windings is embedded can be greatly reduced in size.

  As a result, since the area (area) that shields the coil end portion of the stator winding by the terminal block can be reduced, the cooling air is blown to the stator that generates heat when the rotating electrical machine operates. The risk of hindering the resulting cooling effect can be avoided. Further, the miniaturization of the terminal block can reduce the material cost and the like, thereby reducing the cost.

FIG. 3 is an axial cross-sectional view schematically showing the configuration of the rotating electrical machine according to the first embodiment. FIG. 3 is a perspective view schematically showing the entire stator according to the first embodiment. FIG. 3 is a cross-sectional view in the direction perpendicular to the axis of the stator according to the first embodiment. FIG. 6 is an explanatory diagram showing a state where a segment conductor is inserted into a slot of a stator core in the first embodiment. FIG. 3 is a connection diagram of stator windings that constitute the stator according to the first embodiment. FIG. 3 is a cross-sectional view illustrating an arrangement region of phase winding lead portions of the stator according to the first embodiment. It is a figure which shows the terminal block which concerns on Embodiment 1, Comprising: (a) is a perspective view of a terminal block, (b) is a disassembled perspective view of the terminal embed | buried under a terminal block. It is a perspective view which shows the state with which the terminal block which concerns on Embodiment 1 was mounted | worn on the coil end of a stator winding | coil. FIG. 7 is a perspective view showing a state in which the terminal block shown in FIG. 6 is fixed to a coil end. It is a figure which shows the terminal block which concerns on Embodiment 2, Comprising: (a) is a perspective view of a terminal block, (b) is a temperature detector embed | buried under a terminal block, and an exploded perspective view of a terminal.

  Hereinafter, embodiments of a rotating electrical machine according to the present invention will be specifically described with reference to the drawings.

Embodiment 1
A rotating electrical machine 1 according to this embodiment is used as an AC generator for a vehicle, and as shown in FIG. 1, a stator 20 that works as an armature, a rotor 15 that works as a field, and a rotation A front housing 4a and a rear housing 4b that support the child 15 and sandwich and fix the stator 20 with fastening bolts 4c, and a rectifier 5 that converts AC power into DC power are configured. The rotor 15 rotates integrally with the shaft 6 and includes a Landel pole core 7, a field coil 8, slip rings 9 and 10, a mixed flow fan 11 and a centrifugal fan 12 as a blower. The shaft 6 is connected to a pulley 16 and is rotationally driven by a traveling engine (not shown) mounted on the automobile.

  The Landel-type pole core 7 is configured by combining a pair of pole cores. The Landel-type pole core 7 includes a boss portion 7a assembled to the shaft 6, a disk portion 7b extending in the radial direction from both ends of the boss portion 7a, and 16 claw-shaped magnetic pole portions 7c. The pulley-side mixed flow fan 11 has a blade having an acute inclination with respect to the base plate 11 a fixed to the end face of the pole core 7 by welding or the like, and a right-angle blade, and rotates integrally with the rotor 15. . The centrifugal fan 12 on the side opposite to the pulley has only a blade perpendicular to the base plate 12a fixed to the end face of the pole core 7 by welding or the like.

  A suction hole 17 is provided in the axial end surface of the housing 4. Cooling air discharge holes 18 are provided on both outer shoulders of the housing 4 so as to correspond to the radially outer sides of the first coil end 41 and the second coil end 42 of the stator 20. The rectifier 5 is provided at the end on the side opposite to the pulley of the vehicle alternator 1. Accordingly, the first coil end 41 is disposed in association with the rectifier 5.

  The rotor 15 has a plurality of pairs of magnetic poles arranged on the outer circumferential side facing the inner circumferential side of the stator 20 in the radial direction so that the polarities are alternately different at a predetermined distance in the circumferential direction. These magnetic poles are formed by a plurality of permanent magnets embedded at predetermined positions of the rotor 15. The number of magnetic poles of the rotor 15 is not limited because it varies depending on the rotating electric machine. In the present embodiment, a rotor having 8 pole pairs (N pole: 8, S pole: 8) is used.

  As shown in FIGS. 2 to 9, the stator 20 includes a stator core 30 having a plurality of slots 31 that are opposed to the outer side in the radial direction of the rotor 15 and arranged in the circumferential direction. The first to sixth terminals 71 to 76 that electrically connect the stator winding 40 composed of the two sets of three-phase windings 43 and 44 and the phase windings a to l constituting the stator winding 40. And a terminal block 60 in which is embedded. Insulating paper 37 that electrically insulates between the stator core 30 and the stator winding 40 is disposed along the peripheral wall surface of each slot 31 of the stator core 30 (see FIG. 4).

  The stator core 30 is sandwiched and fixed between the front housing 4a and the rear housing 4b. The stator core 30 is an integral type formed by laminating a plurality of annular electromagnetic steel plates in the axial direction. An insulating thin film is disposed between the laminated electrical steel sheets. The stator core 30 includes an annular back core portion 33 and a plurality of teeth portions 34 that protrude radially inward from the back core portion 33 and are arranged at a predetermined distance in the circumferential direction. A slot 31 is formed between the portions 34. The slots 31 are formed at a ratio of two per one phase of the six-phase stator winding 40 with respect to the number of magnetic poles (eight pole pairs) of the rotor 15. That is, the slots 31 are formed at a rate of two per phase per pole. In the present embodiment, 96 slots 31 are arranged at equal intervals in the circumferential direction from 8 × 6 × 2 = 96.

  The stator winding 40 is composed of a plurality of substantially U-shaped segment conductors 50 whose ends are joined to each other. An insulating film (not shown) is coated on the outermost part of the segment conductor 50 except for both ends. As shown in FIG. 4, the segment conductor 50 has a U-shape composed of a pair of straight portions 51, 51 parallel to each other and a turn portion 52 that connects one end of the pair of straight portions 51, 51 to each other. Is adopted. A top step 53 extending along the end surface 30 a of the stator core 30 is provided at the center of the turn portion 52, and a predetermined amount with respect to the end surface 30 a of the stator core 30 is provided on both sides of the top step 53. An inclined portion inclined at an angle of is provided. FIG. 4 shows a pair of segment conductors 50A and 50B that are inserted in two adjacent slots 31 and 31 of the same phase.

  The U-shaped segment conductor 50 is inserted from one end in the axial direction into two slots 31, 31 having a pair of straight portions 51, 51 separated by a predetermined magnetic pole pitch of the stator core 30. In this manner, the straight portions 51 of the predetermined number of segment conductors 50 are inserted and arranged in all the slots 31. In the case of the present embodiment, a total of six straight portions 51 are stacked in one row (six layers) in the radial direction in each slot 31 (see FIGS. 3 and 6).

  Thereafter, the open ends of the pair of straight portions 51, 51 protruding from the slot 31 toward the other end in the axial direction are bent so as to be obliquely inclined at a predetermined angle toward the opposite sides in the circumferential direction. A skewed portion (not shown) having a length corresponding to the magnetic pole pitch is formed. Then, on the other end side in the axial direction of the stator core 30, the ends of the predetermined oblique portions of the segment conductor 50 are joined together by welding and are electrically connected in a predetermined pattern. Thus, the first and second three-phase windings 43 wound in a spiral manner in the circumferential direction along the slots 31 of the stator core 30 by connecting the predetermined segment conductors 50 in series. , 44 is formed. The two sets of first and second three-phase windings 43 and 44 have an electrical angle phase difference of 30 °.

  An annular first coil in which the turn portion 52 of the segment conductor 50 protruding from the end face 30a of the stator core 30 is laminated in the radial direction on one end side in the axial direction of the stator winding 40 formed in this way. An end 41 is formed. In addition, on the other end side in the axial direction of the stator winding 40, an annular second coil end in which the joint portions of the segment conductors 50 protruding from the end face 30a of the stator core 30 are laminated in the radial direction. 42 is formed.

  For each phase of the stator winding 40, a winding (coil) that makes three rounds around the stator core 30 is formed by the basic U-shaped segment conductor 50. However, for each phase of the stator winding 40, a segment integrally including an output lead wire and a neutral lead wire, and a turn portion connecting the first and second turns and the second and third turns The segment having the shape is formed of a deformed segment different from the basic segment conductor 50. By using these deformed segments, the winding ends of the respective phases of the stator winding 40 are connected, so that the stator winding 40 connected as shown in FIG. 5 is formed.

  As shown in FIG. 5, the stator winding 40 according to the present embodiment includes a first three-phase winding 43 formed by connecting six phase windings a to f and six phase windings g to l. And a second three-phase winding 44 formed by connecting the two. In this case, in the first three-phase winding 43, the phase winding a forms the X phase of the Y winding portion, the phase winding e forms the Y phase of the Y winding portion, and the phase winding c is Y The Z phase of the winding part is formed, the phase winding b forms the U phase of the Δ winding part, the phase winding f forms the V phase of the Δ winding part, and the phase winding d is the Δ winding. Part W phase is formed. In the second three-phase winding 44, the phase winding g forms the U phase of the Y winding portion, the phase winding k forms the V phase of the Y winding portion, and the phase winding i is the Y winding. The W phase of the wire part is formed, the phase winding l forms the X phase of the Δ winding part, the phase winding j forms the Y phase of the Δ winding part, and the phase winding h becomes the Δ winding part The Z phase is formed.

  As shown in FIG. 6, one end portions a <b> 1 to 11 and the other end portions a <b> 2 to l <b> 2 that serve as lead lines for the phase windings a to l are arranged in the same slot 31. The phase windings a to l have the same axial direction (second direction) from the slot 31 where both ends of the one end a1 to l1 and the other end a2 to l2 are adjacent to each other in the circumferential direction of the stator core 30. It is pulled out to the coil end 42 side. That is, one end a1 to l1 and the other end a2 to l2 of each phase winding a to l are brought into a state of being gathered at one place in a range of a predetermined angle θ in the stator 20, as shown in FIG. ing. The angle θ is obtained from the following Equation 1 when the number of phases of the stator winding 40 is X and the number of pole pairs of the rotor 15 is P. In this embodiment, since X = 6 and P = 8, the angle θ is 41.25 °.

θ = (2X−1) · 360 / 2XP [°] Formula 1
In FIG. 6, the other end portions a2, c2, e2, g2, i2, k2 of the phase windings a, c, e, g, i, k located on the outer peripheral side of the slot 31 (upper side in FIG. 6) are This is an output line 46. The other end portions b2, d2, f2, h2, j2, and l2 of the other phase windings b, d, f, h, j, and l are interphase connecting wires 45. Further, the end portions a1 to l1 of the phase windings a to l located on the inner peripheral side of the slot 31 (the lower side in FIG.

  As shown in FIG. 7A, the terminal block 60 is formed of a resin molded body in which six first to sixth terminals 71 to 76 shown in FIG. 7B are embedded. The terminal block 60 is formed in an arc shape corresponding to a part of the annular shape of the second coil end 42 of the stator winding 40. The length of the terminal block 60 in the extending direction (circumferential direction) is substantially the same as the range of the angle θ in the stator 20 shown in FIG. On the inner peripheral surface of the terminal block 60, twelve inner peripheral concave grooves 61 extending in the axial direction are provided at equal intervals in the circumferential direction. Further, twelve outer circumferential concave grooves 62 extending in the axial direction are provided on the outer circumferential surface of the terminal block 60 at equal intervals in the circumferential direction.

  The first to sixth terminals 71 to 76 are formed in a predetermined shape by an electric conductor such as copper, for example. The first to sixth terminals 71 to 76 have base portions 71 a to 76 a extending along the extending direction (circumferential direction) of the arc-shaped terminal block 60, and 2 rising from the base portions 71 a to 76 a to the inner peripheral surface side of the terminal block 60. The inner rising portions 71b to 76b of the book and the one outer rising portion 71c to 76c rising from the base portions 71a to 76a to the outer peripheral surface side of the terminal block 60. The inner rising portions 71 b to 76 b are disposed in the inner circumferential concave groove 61 of the terminal block 60, and the outer rising portions 71 c to 76 c are disposed in the outer circumferential concave groove 62 of the terminal block 60. The leading end portions of the inner rising portions 71 b to 76 b and the outer rising portions 71 c to 76 c protrude from the upper surface of the terminal block 60. The first to sixth terminals 71 to 76 are embedded in the terminal block 60 in a state in which the bases 71a to 76a are electrically insulated from each other and stacked.

  As shown in FIG. 8, the terminal block 60 has one end a1 to l1 and the other end a2 to l2 of the phase windings a to l on the axial end surface of the second coil end 42 of the stator winding 40. Is installed in the range of the angle θ from which it is drawn (see FIG. 3). And one end part a1-l1 and other end part a2-l2 of each phase winding a-1 shown in FIG. 6 are the predetermined | prescribed inner peripheral side recessed groove | channels 61 provided in the inner peripheral surface and outer peripheral surface of the terminal block 60. After being arranged in the inner or outer circumferential concave groove 62, the predetermined end portions that become the interphase connecting wire 45 are first to first arranged in the same inner circumferential concave groove 61 or outer circumferential concave groove 62, respectively. 6 terminals 71 to 76 are joined to predetermined rising portions by welding or the like.

  In the case of this embodiment, with respect to the first terminal 71, one end a1 of the phase winding a and one end b1 of the phase winding b are joined to the inner rising portions 71b and 71b, and the other end of the phase winding f. f2 is joined to the outer rising portion 71c. Also, with respect to the second terminal 72, one end j1 of the phase winding j and one end k1 of the phase winding k are joined to the inner rising portions 72b and 72b, and the other end l2 of the phase winding l rises to the outer side. It is joined to the portion 72c. Also, with respect to the third terminal 73, one end portion c1 of the phase winding c and one end portion d1 of the phase winding d are joined to the inner rising portions 73b and 73b, and the other end portion b2 of the phase winding b is rising outward. It is joined to the portion 73c.

  Then, with respect to the fourth terminal 74, one end l1 of the phase winding l and one end g1 of the phase winding g are joined to the inner rising portions 74b and 74b, and the other end h2 of the phase winding h rises to the outer side. It is joined to the portion 74c. With respect to the fifth terminal 75, one end e1 of the phase winding e and one end f1 of the phase winding f are joined to the inner rising portions 75b and 75b, and the other end d2 of the phase winding d is the outer rising portion 75c. It is joined to. In addition, with respect to the sixth terminal 76, one end h1 of the phase winding h and one end i1 of the phase winding i are joined to the inner rising portions 76b and 76b, and the other end j2 of the phase winding j rises to the outer side. It is joined to the portion 76c.

  Thereafter, as shown in FIG. 9, the terminal block 60 is firmly fixed to the axial end surface of the second coil end 42 using the fixing material 63. As the fixing material 63, for example, an epoxy resin or the like can be used. In addition, for example, a powder resin or an epoxy resin may be used for the exposed portions of the electrical conductors of the first to sixth terminals 71 to 76 and the joints between the first to sixth terminals 71 to 76 and the phase windings a to l. Insulating treatment is performed so as to cover the surface with the insulating material 64.

  According to the rotating electrical machine 1 of the present embodiment configured as described above, one end a1 to l1 and the other end a2 to l2 of each phase winding a to l are adjacent to each other in the circumferential direction of the stator core 30. 31 is pulled out in the same axial direction, and among the end portions of each phase winding, the end portion that becomes the interphase connecting wire 45 is joined to the first to sixth terminals 71 to 76 of the terminal block 60. The one end a1 to l1 and the other end a2 to l2 of each phase winding a to l are configured to be gathered at one place in a predetermined range in the circumferential direction (range of angle θ) of the stator core 30. . Thereby, the circumferential direction length of the 1st-6th terminals 71-76 to which the edge part used as the interphase connecting wire 45 of each phase winding al is joined, and the 1st-6th terminals 71-76 are embed | buried. Since the circumferential length of the terminal block 60 can be reduced, the terminal block 60 in which the first to sixth terminals 71 to 76 that electrically connect the phase windings a to l are embedded is greatly reduced in size. Can be

  As a result, since the region (area) of shielding the second coil end 42 of the stator winding 40 by the terminal block 60 can be reduced, the cooling air is supplied to the stator 20 that generates heat as the rotary electric machine operates. The risk of hindering the cooling effect obtained by blowing air can be avoided. Further, the miniaturization of the terminal block 60 can reduce the material cost and the like, thereby reducing the cost.

  In particular, since the phase windings a to l of the present embodiment are drawn out in a range equal to or smaller than the angle θ of the stator 20, the terminal block 60 can be more reliably and easily reduced in size. it can.

  Further, since the one end a1 to l1 and the other end a2 to l2 of each phase winding a to l are arranged in the same slot 31, the lead wire of each phase winding a to l is provided at one place. Since they can be assembled, the terminal block 60 can be more reliably and easily reduced in size.

  Moreover, in this embodiment, the inner peripheral side recessed groove | channel 61 which each accommodates the one end parts a1-l1 and the other end parts a2-l2 of each phase winding al on the inner peripheral surface and outer peripheral surface of the terminal block 60, respectively. An outer peripheral concave groove 62 is formed. Therefore, a partition wall is provided between the end portions of the respective phase windings a to l accommodated in the adjacent inner circumferential concave groove 61 or outer circumferential concave groove 62, so that each phase winding a to l A good insulating property can be ensured. Furthermore, the inner circumferential concave groove 61 and the outer circumferential concave groove 62 serve as guides for the lead wires of the phase windings a to 1 when the terminal block 60 is mounted on the stator 20. Alignment when joining to the sixth terminals 71 to 76 is facilitated. Moreover, in this embodiment, since the edge part used as the output line 46 is arrange | positioned in the outer peripheral side concave groove 62 among the edge parts of each phase winding a to l, the output line by the vibration from the rotor 15 is output. The vibration of 46 can be suppressed.

  In the present embodiment, since the terminal block 60 is fixed to the second coil end 42 of the stator 20 by using the fixing material 63, the vibration of the terminal block 60 can be limited. The vibration of the lead wire joined to the first to sixth terminals 71 to 76 can be reduced.

  In the present embodiment, the exposed portions of the first to sixth terminals 71 to 76 and the joint portions between the first to sixth terminals 71 to 76 and the phase windings a to l are covered with the insulating material 64. Therefore, it is possible to ensure good insulation of the phase windings a to l.

[Embodiment 2]
A rotating electrical machine according to Embodiment 2 will be described with reference to FIG. 10A and 10B are diagrams showing a terminal block according to the second embodiment, in which FIG. 10A is a perspective view of the terminal block, and FIG. 10B is an exploded perspective view of a temperature detector embedded in the terminal block and the terminal. is there. The rotating electrical machine of the second embodiment differs from that of the first embodiment in that a temperature detector 80 that detects the temperature of the terminal block 160 is added to the terminal block 160. Therefore, the same reference numerals are used for common members, and different points and important points will be mainly described below.

  As shown in FIG. 10A, the terminal block 160 according to the second embodiment includes six first to sixth terminals 71 to 76, a temperature detector 80, and input and output terminals 81 shown in FIG. , 82 are embedded in a resin molded body. Similar to the first embodiment, the terminal block 160 is formed in an arc shape corresponding to a part of the annular shape of the second coil end 42 of the stator winding 40.

  The length of the terminal block 160 in the extending direction (circumferential direction) is substantially the same as the range of the angle θ in the stator 20 shown in FIG. 3, but the input and output terminals 81 and 82 of the temperature detector 80 are connected to the terminal block 160. In order to pull it out from the terminal block 60, it is made slightly longer than the terminal block 60 of the first embodiment. On the inner circumferential surface of the terminal block 160, 12 inner circumferential concave grooves 61 extending in the axial direction are provided at equal intervals in the circumferential direction, as in the first embodiment. Further, on the outer peripheral surface of the terminal block 160, 12 outer peripheral concave grooves 62 extending in the axial direction are provided at equal intervals in the circumferential direction as in the first embodiment.

  The six first to sixth terminals 71 to 76 are the same as those in the first embodiment, and are embedded in a terminal block 160 made of a resin molded body as in the case of the first embodiment. . That is, the inner rising portions 71b to 76b of the first to sixth terminals 71 to 76 are disposed in the inner circumferential concave groove 61 of the terminal block 160, and the outer rising portions 71c to the first to sixth terminals 71 to 76 are arranged. 76 c is disposed in the outer circumferential concave groove 62 of the terminal block 160.

  The temperature detector 80 is embedded in a predetermined position of the terminal block 160 and detects the temperature of the terminal block 160 heated by the lead wires of the phase windings a to l and the first to sixth terminals 71 to 76. Is. In addition, input and output terminals 81 and 82 to which input / output lines of the temperature detector 80 are respectively connected are embedded in the terminal block 160. The input and output terminals 81 and 82 are arranged so that their end portions protrude from the upper part of the terminal block 160. The temperature detector 80 detects the temperature of the terminal block 160 at any time, and appropriately controls the output of the rotating electrical machine before the temperature of the terminal block 160 reaches the melting point of the resin portion (not shown). ).

  In addition, since the other structure of the rotary electric machine of Embodiment 2 is the same as that of Embodiment 1, detailed description is abbreviate | omitted.

  According to the rotating electrical machine of the second embodiment configured as described above, one end a1 to l1 and the other end a2 to l2 of each phase winding a to l are adjacent to each other in the circumferential direction of the stator core 30. Since the end portion of each phase winding is connected to the first to sixth terminals 71 to 76 of the terminal block 160 among the end portions of the windings of each phase. The same operations and effects as in the case of the first embodiment are obtained, such as the size of the table 160 being significantly reduced.

  In particular, in the second embodiment, the temperature detector 80 for detecting the temperature of the terminal block 160 is embedded in the terminal block 160. Therefore, before the temperature of the terminal block 160 reaches the melting point of the resin portion, the rotating electric machine is appropriately used. The terminal block 160 can be prevented from melting by performing control to limit the output of. The temperature detector 80 embedded in the terminal block 160 can also function as a temperature detector for detecting an abnormality in the rotating electrical machine.

  In this embodiment, the input and output terminals 81 and 82 to which the input / output lines of the temperature detector 80 are connected are embedded in the terminal block 160, and the input and output terminals 81 and 82 are drawn from the terminal block 160. Has been. Therefore, since the input / output lines of the temperature detector 80 can be pulled out by the highly rigid input and output terminals 81 and 82 fixed to the terminal block 160, the input / output lines of the temperature detector 80 need not be fixed. Or it can simplify and can reduce manufacturing cost.

[Other Embodiments]
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above-described embodiment, both end portions (one end portions a1 to l1 and the other end portions a2 to l2) of the phase windings a to l are the same in the axial direction from the slots 31 adjacent in the circumferential direction of the stator core 30. However, only one of the one end a1 to l1 and the other end a2 to l2 is pulled out from the slot 31 adjacent to the circumferential direction of the stator core 30 in the same axial direction. You may be made to do.

  In the above embodiment, an example in which the rotating electrical machine according to the present invention is applied to an AC generator for a vehicle has been described. However, the present invention is not limited to a generator or an electric motor as a rotating electrical machine mounted on a vehicle. The present invention can also be used for a rotating electrical machine that can selectively use both.

  DESCRIPTION OF SYMBOLS 1 ... Rotary electric machine, 15 ... Rotor, 20 ... Stator, 30 ... Stator core, 30a ... End surface, 31 ... Slot, 40 ... Stator winding, al ... Phase winding, a1-l1 ... One end part , A2 to l2 ... the other end, 41 ... the first coil end, 42 ... the second coil end, 43 ... the first three-phase winding, 44 ... the second three-phase winding, 45 ... the interphase jumper, 46 ... the output Wires 60, 160 ... Terminal block, 61 ... Inner circumferential concave groove, 62 ... Outer circumferential concave groove, 63 ... Adhering material, 64 ... Insulating material, 71-76 ... First to sixth terminals, 80 ... Temperature detector 81 ... Input terminal, 82 ... Output terminal.

Claims (10)

A rotor core (15) having a plurality of pairs of magnetic poles arranged in the circumferential direction, and a stator core having a plurality of slots (31) arranged radially opposite to the rotor (15) and arranged in the circumferential direction ( 30) and a stator (20) having a stator winding (40) comprising at least three phase windings (a to l) wound around the slot (31), and the stator (20) A terminal block (60) in which terminals (71 to 76) for electrically connecting the phase windings (a to l) drawn out from the terminal block (60) are embedded,
At least one end (a1 to l1) of each of the phase windings (a to l) is drawn out in the same axial direction from the circumferentially adjacent slot (31) of the stator core (30), Of the ends of the phase windings (a to l), the end serving as the interphase connecting wire (45) is joined to the terminals (71 to 76) of the terminal block (60). Electric. In the rotating electrical machine according to claim 1,
Each of the phase windings (a to l) is drawn out in the range of (2X-1) · 360 / 2XP [°] (X is the number of phases and P is the number of pole pairs) in the stator (20). A rotating electric machine that is characterized. In the rotating electrical machine according to claim 1 or 2,
One end portion (a1 to l1) and the other end portion (a2 to l2) of each phase winding (a to l) are arranged in the same slot (31). In the rotary electric machine according to any one of claims 1 to 3,
At least one of the inner peripheral surface and the outer peripheral surface of the terminal block (60) is formed with an axially extending concave groove (61, 62) that accommodates the end of each of the phase windings (a to l). A rotating electric machine characterized by In the rotating electrical machine according to claim 4,
Of the ends of each of the phase windings (a to l), the end serving as the output line (46) is disposed in the concave groove (61, 62). In the rotating electrical machine according to claim 4,
Of the end portions of each of the phase windings (a to l), the end portion serving as the interphase connecting wire (45) is disposed in the concave groove (61, 62). In the rotating electrical machine according to any one of claims 1 to 6,
A rotating electric machine characterized in that a temperature detector (80) for detecting the temperature of the terminal block (60) is embedded in the terminal block (60). The rotating electrical machine according to claim 7,
Terminals (81, 82) to which input / output lines of the temperature detector (80) are connected are embedded in the terminal block (60), and the terminals (81, 82) are pulled out from the terminal block (60). Rotating electric machine characterized by that. In the rotating electrical machine according to any one of claims 1 to 8,
The rotating electrical machine, wherein the terminal block (60) is fixed to the stator (20) using a fixing material (63). In the rotating electrical machine according to any one of claims 1 to 9,
The rotating electric machine characterized in that an exposed portion of the terminal (71 to 76) and a joint portion between the terminal (71 to 76) and the phase winding (a to l) are covered with an insulating material (64). .

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