JP2006174547A - Stator of dynamo-electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator of a dynamo-electric machine improving the efficiency for connecting coils. <P>SOLUTION: A plurality of coil bobbins 4 are installed to an annular stator core 1. Each coil 5 is arranged at the external periphery of each coil bobbin 4. The coils 5 are connected to one another by inter-coil connecting bodies 10. Each of the inter-coil connecting bodies 10 comprises a plurality of phase connecting conductors 18a, 18b, 18c and 18d that connect the coils at each phase, and an insulating molded material 19. The phase connecting conductors 18a, 18b, 18c and 18d are integrated by the insulating molded material 19. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a stator for a rotating electrical machine in which a plurality of winding portions are connected to each other.

  In the conventional apparatus, a plurality of coil bobbins are attached to an annular stator core. A stator winding is wound around each coil bobbin. The winding start end and winding end end of each stator winding are fixed to the flanges of the coil bobbins. On the collar of the coil bobbin, a connection plate formed in a cylindrical shape with an insulating material is placed.

  A plurality of arc-shaped grooves are concentrically provided on the end surface of the connection plate on the side opposite to the coil bobbin. The coil bobbin side end surface of the connection plate is provided with a plurality of insertion holes communicating with the respective grooves provided on the anti-coil bobbin side end surface. The insertion holes are arranged at the positions of the winding start end and the winding end end of the stator winding.

  In each groove, an arcuate conductive member for discrimination is fitted. The phase-specific conductive member protrudes from the insertion hole at the position where the insertion hole is provided. The protruding portion of the different conductive member is bent in the radial direction of the stator. A plurality of stator windings are connected to each other when the bent conductive member for separation is electrically connected to the winding start end and winding end of the stator winding (see, for example, Patent Document 1). ).

Japanese Patent Laid-Open No. 11-18345

  In the stator of the conventional rotating electric machine as described above, each stator winding is configured such that a plurality of different conductive members are fitted in grooves provided in the connection plate, and further, the different conductive members protruding from the insertion holes are bent. Complicated work is required for assembling parts for connecting the lines.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a stator of a rotating electrical machine that can improve the efficiency of connection work between coil portions. .

  The stator of the rotating electrical machine according to the present invention includes an annular stator core in which a plurality of coil bobbin mounting portions are provided at intervals in the circumferential direction, a plurality of coil bobbins mounted on each coil bobbin mounting portion, A coil portion having a coil portion provided on the outer periphery, a plurality of phase connection conductors arranged in an annular shape and connecting the coil portions for each phase, and an insulating molding material integrated by covering the phase connection conductors together A connecting body is provided.

  According to the stator of the rotating electrical machine of the present invention, the inter-coil connecting body includes a plurality of phase connecting conductors that connect the coil parts for each phase, and an insulating molding material that is integrated by covering the phase connecting conductors together. Therefore, for example, it is not necessary to perform operations such as fitting a plurality of phase connection conductors into the grooves, and the efficiency of the connection operation between the coil portions can be improved.

The best mode for carrying out the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a front view showing a stator of a rotating electrical machine in a state in which a connection part 10 between coils according to Embodiment 1 of the present invention is attached. FIG. 2 is an explanatory diagram showing the configuration of the stator in region I of FIG. The stator of the rotating electrical machine in this example is a stator used for an electric motor to which three-phase (U-phase, V-phase, W-phase) AC power is supplied.

  In the figure, the stator iron core 1 has an annular core back portion 1a and a plurality of magnetic poles (coil bobbin mounting portions) 1b. The core back part 1a is formed by laminating silicon steel plates. Each magnetic pole 1b protrudes from the core back part 1a in the inner diameter direction of the core back part 1a at equal intervals.

  A coil bobbin 4 is mounted on each magnetic pole 1b. The coil bobbin 4 is made of an insulating resin. Coil portions 5 are provided on the outer periphery of each coil bobbin 4. The coil part 5 is comprised with the insulation coating copper wire.

  Here, the core back part 1a is comprised by the several core piece. Each core piece is connected on the outer diameter side of the back surface (not shown) of the core back portion 1a. A slit is provided between each core piece. The magnetic pole 1b is connected to the core piece. Initially, the coil bobbin 4 is attached to the magnetic pole 1b in a state where the core back part 1a is extended on the work table, and the coil part 5 is provided on the outer periphery of the coil bobbin 4. Thereafter, the core back portion 1a is bent into an annular shape, and the slits between the core pieces are brought into close contact with each other, whereby the stator core 1 is formed.

  Each coil part 5 is distributed in order for U-phase, V-phase, and W-phase. That is, the coil unit 5 includes U-phase coil units Cu1 to Cu12, V-phase coil units Cv1 to Cv12, and W-phase coil units Cw1 to Cw12.

  Each coil part 5 has a power connection lead line connected to the power source side and a neutral phase connection lead line connected to the neutral phase. That is, the U-phase coil portions Cu1 to Cu12 have power connection lead lines Tu11 to Tu121 and neutral phase connection lead lines Tu12 to Tu122. Similarly, the V-phase coil sections Cv1 to Cv12 have power connection lead lines Tv11 to Tv121 and neutral phase connection lead lines Tv12 to Tv122, and the W-phase coil sections Cw1 to Cw12 are connected to the power supply. It has lead lines Tw11 to Tw121 and neutral phase connection lead lines Tw12 to Tw122.

  On the end surface side in the axial direction of the stator core 1, an annular inter-coil connecting member 10 that connects the coil portions 5 is disposed. The inner diameter of the inter-coil connecting body 10 is larger than the inner diameter of the stator core 1. Further, the outer diameter of the inter-coil connecting body 10 is smaller than the outer diameter of the stator core 1.

  The inter-coil connecting body 10 is composed of a plurality of arc-shaped coil connection conductor molded products 11 and 12 that are connected to each other in the circumferential direction of the stator core 1. That is, the inter-coil connecting body 10 is equally divided in the circumferential direction of the stator core 1. The coil connection conductor molded product 12 is connected to the external connection terminal 16 via a plurality of relay wires 15. Although not shown, the external connection terminal 16 is provided on the exterior of the motor and is connected to a power source that is an external circuit.

  The coil connection conductor molded products 11 and 12 are connected to the U-phase, V-phase, and W-phase coil portions 5 one by one. That is, three coil portions 5 are connected to one coil connection conductor molded product 11, 12.

  Each of the coil connection conductor molded products 11 and 12 includes a phase connection conductor for neutral phase 18a, a phase connection conductor for U phase 18b, a phase connection conductor for V phase 18c, and W for connecting the coil portions 5 to each other. The phase connection conductor for phase 18d and the phase connection conductors 18a to 18d for the respective phases are collectively provided with an insulating molding material 19 that is integrated. The phase connection conductors 18a to 18d for each phase are strip-shaped copper plates.

  The phase connection conductors 18 a to 18 d for in-phase included in the coil connection conductor molded products 11 and 12 are connected to each other by the phase connection conductor connecting portion 25. The phase connection conductors 18a to 18d for the same phase are connected to each other by the phase connection conductor connection portion 25, whereby the inter-coil connection body 10 is formed.

  A plurality of neutral wire connection terminals 20 are connected to the neutral phase phase connection conductor 18a. Each neutral wire connection terminal 20 is connected to neutral phase connection lead lines Tu12 to Tu122, Tv12 to Tv122, and Tw12 to Tw122, respectively. That is, the neutral phase phase connection conductor 18a is connected to the neutral phase connection lead lines Tu12 to Tu122, Tv12 to Tv122, and Tw12 to Tw122 via the plurality of neutral wire connection terminals 20, respectively. In addition, all the coil parts 5 are connected to the phase connection conductor 18a for neutral phases.

  Similarly to the phase connection conductor for neutral phase 18a, the phase connection conductor for U phase 18b is connected to the power connection lead lines Tu11 to Tu121 via the plurality of U phase connection terminals 21, respectively. The phase connection conductor 18c is connected to the power connection lead lines Tv11 to Tv121 via the plurality of V-phase connection terminals 22, and the W-phase phase connection conductor 18d is connected to the plurality of W-phase connection terminals 23. Are connected to power connection lead lines Tw11 to Tw121, respectively.

  Next, FIG. 3 is a sectional view taken along line II-II in FIG. In the drawing, a lead wire connecting portion 30 is provided at the tip of the neutral wire connecting terminal 20. The lead wire connecting portion 30 protrudes from the insulating molding material 19 in the outer diameter direction of the stator core 1. The lead wire connecting portion 30 is provided with a lead wire insertion hole 30a. When the neutral wire connection terminal 20 is viewed from the axial direction of the stator core 1, the lead wire connection portion 30 does not protrude from the coil bobbin 4 in the outer diameter direction of the stator core 1.

  On the outer periphery of the coil bobbin 4, a lead wire holding groove 4 a is provided on the outer diameter direction side of the stator core 1. The neutral phase connection lead wire Tw22 protrudes in the axial direction of the stator core 1 from the lead wire holding groove 4a. Further, the neutral phase connection lead wire Tw22 is inserted into the lead wire insertion hole 30a. Further, the neutral phase connection lead wire Tw22 is fixed to the lead wire connection portion 30 by, for example, soldering after being inserted into the lead wire insertion hole 30a. The configuration of the neutral phase connection lead lines Tu12 to Tu122, Tv12 to Tv122, Tw12, and Tw32 to Tw122 other than the neutral phase connection lead line Tw22 is the same as the configuration of the neutral phase connection lead line Tw22 described above. .

  Next, FIG. 4 is a sectional view taken along line III-III in FIG. FIG. 5 is a sectional view taken along line IV-IV in FIG. 6 is a cross-sectional view taken along line VV in FIG. In the figure, the configurations of the U-phase, V-phase, and W-phase power connection lead lines Tu11 to Tu121, Tv11 to Tv121, and Tw11 to Tw121 are the same as the configuration of the neutral phase connection lead line Tw22 described above. is there.

  Next, FIG. 7 is an explanatory view showing the configuration of the coil connection conductor molded article 12 in the region VI of FIG. In the figure, relay line connection terminals 31 are respectively attached to the phase connection conductors 18b to 18d for each phase. In addition, crimp terminals 15 a are respectively attached to both ends of each relay line 15. The crimp terminal 15 a at one end is connected to the relay line connection terminal 31. The other end of the crimp terminal 15 a is connected to the external connection terminal 16.

  Next, FIG. 8 is a sectional view taken along line VII-VII in FIG. 9 is a cross-sectional view taken along line VIII-VIII in FIG. 10 is a cross-sectional view taken along line IX-IX in FIG. In the figure, a relay line connection part 32 is provided at the tip of the relay line connection terminal 31. The relay wire connecting portion 32 protrudes from the insulating molding material 19 in the outer diameter direction of the stator core 1. The relay line connecting portion 32 is bent toward the stator core 1 side. That is, the relay line connecting part 32 has an L-shaped cross section. The trunk line connecting portion 32 is provided with a trunk line connecting hole 32a.

  When the relay line connection terminal 31 and the relay line 15 are connected, the relay line connection hole 32a and the hole of the crimp terminal 15a are overlapped, and the rivet 33 is inserted and caulked into the overlapped hole.

  Next, FIG. 11 is a cross-sectional view taken along line XX in FIG. 2, and is an explanatory view showing a state when the coil connection conductor molded product 11 is arranged on the coil bobbin 4. In the figure, a projection 4 b that protrudes in the axial direction of the stator core 1 is provided on the collar portion of the coil bobbin 4. The coil connection conductor molded product 11 is provided with a coil bobbin connection portion 35 protruding in the outer diameter direction of the stator core 1. The coil bobbin connecting portion 35 is provided with a protruding portion insertion hole 35a into which the protruding portion 4b is inserted. The protrusion 4b is inserted into the protrusion insertion hole 35a.

  Next, FIG. 12 is a cross-sectional view taken along the line XX of FIG. 2 and is an explanatory view showing a state when the coil connection conductor molded product 11 is fixed to the coil bobbin 4. In the figure, the coil connection conductor molded product 11 is fixed to the coil bobbin 4. When the coil connection conductor molded article 11 is fixed to the coil bobbin 4, after the projection 4b is inserted into the projection insertion hole 35a, the tip of the projection 4b is heated by, for example, applying ultrasonic vibration. Added and transformed. The coil connection conductor molded product 12 is supported by the coil connection conductor molded product 11 by being connected to the adjacent coil connection conductor molded product 11.

  Next, FIG. 13 is a partial cross-sectional view taken along line XI-XI in FIG. In the figure, a connecting hole 36 is provided at the tip of the neutral phase phase connecting conductor 18a. When the adjacent coil connection conductor molded products 11 and 12 are connected, the connection holes 36 of the adjacent phase connection conductors 18a for the neutral phase are overlapped, and the rivets 33 are inserted into the connection holes 36 and caulked. It is done. The material of the rivet 33 is the same copper as the material of the phase connection conductors 18a to 18d.

  Similarly, the phase connection conductors 18b to 18d for the phases other than the phase connection conductor 18a for the neutral phase are connected to each other by the rivet 33 for each phase between the coil connection conductor molded products 11 and 12.

  In such a stator of a rotating electrical machine, the inter-coil connection body 10 includes a plurality of phase connection conductors 18a to 18d for each phase that connect the coil portions 5 to each other, and a phase connection conductor for each phase. Since it has the insulation molding material 19 integrated by covering 18a-18d collectively, it is not necessary to perform the operation | work of inserting the phase connection conductors 18a-18d for each phase, for example in each groove | channel, The efficiency of the connection work between each coil part 5 can be improved.

  Further, in the case of a structure in which the phase connection conductors 18a to 18d for each phase are fitted in the grooves as in the conventional case, the phase connection conductors 18a to 18d are exposed at the opening portions of the grooves, and therefore the phase connection conductor 18a. Although it was necessary to make the groove deeper in order to prevent -18d from contacting other members, the phase connection conductors 18a-18d are covered with the insulating molding material 19, so that they may contact other members. In addition, the depth of the inter-coil connecting body 10 can be further shortened. That is, the size of the electric motor can be further reduced. Therefore, for example, when the stator of this example is used for an electric motor of an elevator hoisting machine, the installation space for the elevator hoisting machine can be reduced, which is particularly effective. Furthermore, in the machine room-less elevator in which the elevator hoisting machine is installed in the hoistway, the space occupied by the hoistway in the building can be reduced, which is further effective.

  Furthermore, in the past, it was necessary to prepare a large mold for producing the entire inter-coil connecting body 10, but the inter-coil connecting bodies 10 are connected to each other in the circumferential direction of the stator core 1. Since the arc-shaped coil connection conductor molded articles 11 and 12 are formed, the mold for forming the inter-coil connecting body 10 can be made smaller, and the manufacturing cost can be further reduced.

  Furthermore, since the phase connection conductors 18a to 18d of the same phase are connected to each other by the rivets 33 when the coil connection conductor molded products 11 and 12 are connected, high strength connection can be realized in a small space. . That is, when current flows through the phase connection conductors 18a to 18d, electromagnetic vibrations are generated in the phase connection conductors 18a to 18d, but the connection between the phase connection conductors 18a to 18d can withstand the vibration.

  In addition, the coil connection conductor molded product 11 is fixed to the coil bobbin 4 by deforming the distal end portion of the projection 4b inserted into the projection insertion hole 35a, so that the coil connection conductor molded product 11 is attached to the coil bobbin 4. It is not necessary to prepare a separate part to be fixed, and can be fixed easily.

  Furthermore, although the mounting location of the external connection terminal 16 is generally different depending on the specifications of the electric motor, the coil connection conductor molded product 12 and the external connection terminal 16 are connected to each other via the relay wire 15. Even if the attachment position is changed, the length of the relay wire 15 can be changed without changing the structure of the coil connection conductor molded product 12.

  Furthermore, since the lead wire connecting portion 30 and the relay wire connecting portion 32 protrude from the insulating molding material 19 in the outer diameter direction of the stator core 1, it is easy to insert and operate the connecting tools and to facilitate the wiring work. This can be done, and the reliability of the connected portion can be improved.

Embodiment 2. FIG.
Next, FIG. 14 is a cross-sectional view showing a connection portion between a coil bobbin 40 and a coil connection conductor molded product 41 according to Embodiment 2 of the present invention. In the first embodiment, the coil connection conductor molded product 11 is fixed to the coil bobbin 4 by deforming the tip end of the projection 4b inserted into the projection insertion hole 35a. Then, the nail | claw part 40a provided in the collar part of the coil bobbin 40 is hooked in the nail | claw part insertion hole 41a provided in the coil connection conductor molded product 41, and the coil connection conductor molded product 41 is attached to the coil bobbin 40. . Other configurations are the same as those in the first embodiment.

  In such a rotating electric machine stator, the claw portion 40a is hooked into the claw portion insertion hole 41a, so that the coil connection conductor molded product 41 is attached to the coil bobbin 40. Therefore, in addition to the effects of the first embodiment, the coil The work for fixing the connection conductor molded product 41 to the coil bobbin 40 becomes easier, and the work efficiency can be further improved.

Embodiment 3 FIG.
Next, FIG. 15 is an explanatory view showing the structure of the stator of the rotating electric machine according to Embodiment 3 of the present invention. In the first embodiment, adjacent coil parts 5 for U phase, V phase, and W phase are connected to the coil connection conductor molded products 11 and 12 one by one. Then, two sets of adjacent coil portions 5 for U-phase, V-phase, and W-phase are connected to the coil connection conductor molded product 42. That is, the two coil connection conductor molded products 11 and 12 are produced in a state of being put together. Other configurations are the same as those in the first embodiment.

  In such a stator of a rotating electric machine, since the two coil connection conductor molded products 11 and 12 are produced in a state of being combined, in addition to the effects of the first embodiment, the connection of the coil connection conductor molded products 11 and 12 is performed. Work can be omitted, and work efficiency can be further improved.

  In the third embodiment, the number of sets of the coil portions 5 connected to the coil connection conductor molded product 42 is not limited to two sets, and the number of sets is arbitrary. Further, for example, when the outer diameter of the stator core 1 is small, one coil connection conductor molded product may constitute the inter-coil connection body, and all the coil portions are included in the one coil connection conductor molded product. May be connected.

Embodiment 4 FIG.
Next, FIG. 16 is a partial sectional view showing a phase connection conductor coupling portion 25 according to Embodiment 4 of the present invention. In the first embodiment, the in-phase phase connection conductors 18a to 18d are connected to each other by the rivets 33. In the fourth embodiment, the in-phase phase connection conductors 18a to 18d are connected to their ends. The crimping sleeve 45 is inserted into the bent end portion and the crimping sleeve 45 is crushed to be connected. Furthermore, the part which the edge parts of the phase connection conductors 18a-18d are contacting is welded. Other configurations are the same as those in the first embodiment.

  The same effect as that of the first embodiment can be obtained even by such a connecting method of the phase connection conductors 18a to 18d.

Embodiment 5. FIG.
Next, FIG. 17 is a sectional view showing a connecting portion of relay line connecting terminal 31 according to the fifth embodiment of the present invention. In the first embodiment, the relay line connection terminal 31 and the relay line 15 are connected by the rivet 33, but in this fifth embodiment, the relay line 15 is connected to the relay line connection terminal 31 by the bolt and nut 46. It is fixed. Other configurations are the same as those in the first embodiment.

  The same effect as that of the first embodiment can also be obtained by such a method of fixing the relay line connection terminal 31 and the relay line 15.

  In the first to fifth embodiments, the stator of the rotating electrical machine has been described so as to correspond to the three-phase power source. However, the number of phases is not limited to three phases, and may correspond to multiple phases. That is, the number of phase connection conductors is not limited to four, and may be two, three, or five or more depending on the motor specifications.

  Moreover, although the stator of the rotating electrical machine has been described as a stator used for an electric motor, it may be used for a generator.

It is a front view which shows the stator of the rotary electric machine in the state to which the connection part between coil parts by Embodiment 1 of this invention was attached. It is explanatory drawing which shows the structure of the stator in the area | region I of FIG. It is sectional drawing which follows the II-II line of FIG. It is sectional drawing which follows the III-III line of FIG. It is sectional drawing which follows the IV-IV line of FIG. It is sectional drawing which follows the VV line of FIG. It is explanatory drawing which shows the structure of the coil connection conductor molded article in the area | region VI of FIG. It is sectional drawing which follows the VII-VII line of FIG. It is sectional drawing which follows the VIII-VIII line of FIG. It is sectional drawing which follows the IX-IX line of FIG. It is sectional drawing which follows the XX line of FIG. 2, and is explanatory drawing which shows a state when a coil connection conductor molded article is arrange | positioned on a coil bobbin. It is sectional drawing which follows the XX line of FIG. 2, and is explanatory drawing which shows a state when a coil connection conductor molded article is fixed to the coil bobbin. FIG. 3 is a partial cross-sectional view taken along line XI-XI in FIG. 2. It is sectional drawing which shows the connection part of the coil bobbin and coil connection conductor molded product by Embodiment 2 of this invention. It is explanatory drawing which shows the structure of the stator of the rotary electric machine by Embodiment 3 of this invention. It is a partial cross section figure which shows the phase connection conductor connection part by Embodiment 4 of this invention. It is sectional drawing which shows the connection part of the trunk line connection terminal by Embodiment 5 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Stator iron core, 1a Core back part, 1b Magnetic pole, 4,40 Coil bobbin, 4b Projection part, 5 Coil part, Connection part between coil parts, 11, 12, 41, 42 Coil connection conductor molded product, 15 Relay line, 16 External connection terminals, 18a to 18d Phase connection conductor, 19 Insulation molding material, 33 Rivet, 35a Projection part insertion hole, 40a Claw part, 41a Claw part insertion hole.

Claims (6)

An annular stator core in which a plurality of coil bobbin mounting portions are provided at intervals in the circumferential direction;
A plurality of coil bobbins mounted on each of the coil bobbin mounting portions,
Insulation molding that is integrated by covering the phase connection conductors together with the coil portions provided on the outer periphery of each coil bobbin, a plurality of phase connection conductors arranged in an annular shape and connecting the coil portions for each phase. A stator for a rotating electrical machine, comprising: a connecting part between coil parts having a material.   2. The stator for a rotating electrical machine according to claim 1, wherein the inter-coil connecting body is constituted by a plurality of arc-shaped coil connection conductor molded products that are connected to each other in the circumferential direction of the stator core.   The stator of a rotating electrical machine according to claim 2, wherein the phase connection conductors of the same phase included in each of the coil connection conductor molded products are connected to each other by rivets. Each coil bobbin is provided with a protruding portion that protrudes in the axial direction of the stator core,
The coil connection conductor molded product is provided with a protrusion insertion hole into which the protrusion is inserted,
The coil connection conductor molded product is characterized by being fixed to the coil bobbin by deforming the tip of the protrusion after the protrusion is inserted into the protrusion insertion hole. The stator of the rotary electric machine according to any one of claims 1 to 3. Each coil bobbin is provided with a claw portion protruding in the axial direction of the stator core,
The coil connection conductor molded product is provided with a claw part insertion hole on which the claw part is hooked,
The said coil connection conductor molded product is attached to the said coil bobbin by the said nail | claw part being hooked in the said nail | claw part insertion hole, The Claim 1-Claim 3 characterized by the above-mentioned. Stator of rotating electrical machine. The external connection terminal connected to an external circuit, and the relay line which connects the said connection part between coil parts and the said external connection terminal are further provided, The claim 1 characterized by the above-mentioned. The stator of the described rotating electrical machine.

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