JP5111887B2 - Rotating electric machine stator - Google Patents

Description

  The present invention relates to a stator of a rotating electric machine used for an electric motor or a generator such as a synchronous motor and an induction motor.

  In a conventional stator of a rotating electric machine, an insulating bobbin is attached to a tooth portion, and a coil conductor that forms a coil is wound around the insulating bobbin. The coil conductor is supplied with electric power through a connection conductor electrically connected to the power source and a branch line electrically connected to the connection conductor. The branch wire and the end portion of the coil conductor are drawn out to the outside in the radial direction of the stator core (the outer periphery of the stator core) and connected to each other. Further, the connection location between the branch line and the end of the coil conductor, and the connection conductor are fixed by a conductor fixing mechanism (an inter-terminal connection conductor support and an inter-terminal connection conductor support) attached to the upper surface of the insulating bobbin. . Here, the lead-out location of the branch line from the connection conductor is different in the circumferential direction of the stator core for each phase (U-phase, V-phase, W-phase) of the coil, and a conductor fixing mechanism having a shape corresponding to the lead-out location Is attached to the insulating bobbin (see, for example, Patent Document 1).

JP-A-2005-130580

  In the conventional rotating electrical machine stator as described above, the conductor fixing mechanism having a different shape for each phase is attached to the insulating bobbin. Therefore, the conductor fixing mechanism having a shape not corresponding to the coil phase is attached to the insulating bobbin at the time of assembly. It may be. In this case, correction work is required, and the work efficiency during assembly has been reduced. In addition, since multiple types of conductor fixing mechanisms are used, multiple types of molds are required for their production (molding), and it takes time and effort to manage them, resulting in high production costs. .

  The present invention has been made to solve the above-described problems, and it is possible to improve the working efficiency during assembly and to obtain a stator for a rotating electrical machine that can reduce production costs. Objective.

  A stator of a rotating electrical machine according to the present invention includes an annular stator core having a yoke portion and a plurality of teeth portions that are spaced apart from each other in the circumferential direction and project radially from the yoke portion, A plurality of coil conductors that are provided in each tooth part and form a coil of a plurality of phases, and are provided annularly along the circumferential direction of the stator core so as to pass between adjacent tooth parts, and the stator core Are arranged at intervals in the radial direction, and are connected to the ends of the coil conductors for each phase at a plurality of connection locations provided so as to correspond to the positions of the teeth portions, and are in phase with each other. A connection conductor that forms a power distribution circuit between coil conductors and a plurality of conductor fixing mechanisms that are provided in each tooth portion and fix each connection conductor. The conductor fixing mechanism is spaced from each other in the radial direction of the stator core. Line up And a plurality of conductor engaging portions that are arranged at intervals in the width direction of the tooth portion and are engaged with the connection conductor, and between the conductor engaging portions that are adjacent to each other in the width direction of the tooth portion. Provided with a plurality of connection location engaging portions that can be engaged with the connection location.

  In the stator of the rotating electrical machine according to the present invention, each connection conductor is fixed by a conductor fixing mechanism, and a connection portion engagement portion is provided between each conductor engagement portion adjacent to each other in the width direction of the tooth portion. Therefore, the shape of the conductor fixing mechanism is unified in all phases, the work efficiency at the time of assembly can be improved, the labor of management is reduced, and the production cost can be reduced.

The best mode for carrying out the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a top view showing a permanent magnet synchronous motor according to Embodiment 1 of the present invention. FIG. 2 is an enlarged top view showing a region of line II in FIG. 3 is a cross-sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is an exploded perspective view showing the region of line V in FIG.
In the figure, a permanent magnet synchronous motor (permanent magnet motor) has an annular stator 1 and a rotor 2 that is rotatably provided on the inner periphery of the stator 1. A plurality of permanent magnets 3 are fixed to the outer peripheral surface of the rotor 2. The stator 1 has an annular stator core 4 and a plurality of coils. The stator core 4 includes a plurality of core members 4a formed by laminating a plurality of magnetic plates. The plurality of core members 4a are connected to each other so as to form a ring.

  The core member 4 a includes a yoke portion 4 b and a teeth portion 4 c that protrudes from the yoke portion 4 b toward the radially inner side of the stator core 4. A cylindrical insulating bobbin 5 is inserted and attached to the tooth portion 4c. A coil conductor (stator winding) 6 forming a coil is wound around the side surface of the insulating bobbin 5. One coil conductor 6 is wound around the side surfaces of a pair of insulating bobbins 5 adjacent to each other to form two coils. Further, one end portion of the coil conductor 6 is drawn from one of the pair of insulating bobbins 5 and constitutes a winding start end portion 6a. Further, the other end portion of the coil conductor 6 is drawn out from the other of the pair of insulating bobbins 5 to constitute a winding termination portion 6b. At both ends of the insulating bobbin 5 in the length direction (the radial direction of the stator core 4), fixing member mounting claw grooves (claw holes) 5a are provided as engaging claw grooves.

  A lower conductor fixing member 7 is provided on the upper surface of the insulating bobbin 5. The lower conductor fixing member 7 is arranged so as to bridge the upper surfaces of both ends in the length direction of the insulating bobbin 5 (the radial direction of the stator core 4). Also, on the upper surface of the lower conductor fixing member 7, there are a plurality of connection holdings as flat portions 7 a parallel to the horizontal direction and in the center in the width direction spaced from each other in the length direction. A member engaging long groove 7b is provided. Further, a pair of fixing member attaching claws 7 c as engaging claws are provided on the lower surface of the lower conductor fixing member 7 at intervals in the length direction of the lower conductor fixing member 7. The fixing member attaching claw portion 7c is arranged downward. Further, the fixing member mounting claw portion 7c is engaged with the fixing member mounting claw groove 5a, and the fixing member mounting claw portion 7c is engaged with the fixing member mounting claw groove 5a. Lower conductor fixing members 7 are fixed to the upper surfaces of both end portions of the insulating bobbin 5. Further, the length dimension of the fixing member attaching claw portion 7c and the depth dimension of the fixing member attaching claw groove 5a are equal to each other.

  Furthermore, upper and lower connecting claw grooves 7 d are provided at corners of both end surfaces in the length direction of the lower conductor fixing member 7. In addition, a plurality of (three) phase conductors 8 to 10 and a common conductor 11 as connecting conductors are spaced apart from each other in the radial direction of the stator core 4 on the flat surface portion 7 a of the lower conductor fixing member 7. It is placed. Each conductor 8-11 is cyclically | annularly arrange | positioned along the circumferential direction of the stator core 4 so that between the said teeth parts adjacent to each other may be passed. Each of the conductors 8 to 11 is connected to a power supply device (not shown) outside the stator core 4 via the power supply unit 12. Each of the phase conductors 8 to 10 is a conductor for supplying electric power to each phase (U phase, V phase, W phase) of the coil, and the common conductor 11 is for configuring an electrical neutral wire of the coil. It is a conductor. That is, the conductors 8 to 11 form a power distribution circuit between the coil conductors 6 having the same phase. A winding start end 6a of each coil is electrically connected to each phase conductor 8 to 10 for each phase. Each winding terminal end 6 b is electrically connected to the common conductor 11.

  The connection locations of the respective phase conductors 8 to 10 and the respective winding start end portions 6a and the connection locations of the common conductor 11 and the respective winding termination end portions 6b correspond to the respective tooth portions 4c (positions immediately above the respective tooth portions 4c). Is provided. In addition, crimp sleeves 13 as connection holding members are attached to the connection portions of the phase conductors 8 to 10 and the winding start end portions 6a and the connection portions of the common conductor 11 and the winding end portions 6b, respectively. The crimping sleeve 13 is crimped so as to cover each connection portion (crushed). The crimp sleeve 13 is disposed in the connection holding member engagement long groove 7b, is inserted into the connection holding member engagement long groove 7b, and is engaged with the connection holding member engagement long groove 7b. That is, the crimp sleeve 13 is fixed by engaging with the connection holding member engagement long groove 7b.

  An upper conductor fixing member 14 is provided above each lower conductor fixing member 7. The shape of the upper conductor fixing member 14 is a box shape having a hollow portion and having an open lower surface. Here, the lower conductor fixing member 7 and the upper conductor fixing member 14 are formed of resin and constitute a conductor fixing mechanism 15. The upper surface of the upper conductor fixing member 14 is inclined downward from the center in the length direction toward both ends of the center portion in the length direction. In addition, upper and lower connecting claws 14 a are provided at corners of both end surfaces in the length direction of the upper conductor fixing member 14. The upper and lower connecting claw portions 14a are engaged with the upper and lower connecting claw grooves 7d, and the upper and lower connecting claw portions 14a and the upper and lower connecting claw grooves 7d are engaged with each other. Lower conductor fixing members 7 are connected to each other vertically.

  A plurality of (eight) conductor engaging grooves 14b are provided on both end faces in the width direction of the upper conductor fixing member 14 as conductor engaging portions that can be engaged with the conductors 8-11. Half of the plurality of conductor engaging grooves 14b are arranged on the one end surface side in the width direction of the upper conductor fixing member 14 (the left surface in FIG. 2) at intervals from each other in the length direction of the upper conductor fixing member 14. It has been. The remaining half of the plurality of conductor engaging grooves 14b are spaced from each other in the length direction of the upper conductor fixing member 14 on the other end surface side in the width direction of the upper conductor fixing member 14 (the right side surface in FIG. 2). Are lined up. In other words, half of the plurality of conductor engaging grooves 14b and the remaining conductor engaging grooves 14b are arranged at an interval in the width direction of the tooth portion 4c. Here, when the upper conductor fixing member 14 and the lower conductor fixing member 7 are connected to each other, the connection holding member engaging long groove 7b is formed between the conductor engaging grooves 14b adjacent to each other in the width direction of the tooth portion 4c. Arranged between.

  The conductor engaging grooves 14b for the phase conductors 8 to 10 arranged on one end surface in the width direction of the upper conductor fixing member 14 have a plurality of notched grooves 14c for engaging with the winding start end 6a. Yes. Further, the conductor engaging groove 14b for the common conductor 11 disposed on the other end surface in the width direction of the upper conductor fixing member 14 has a notch groove portion (not shown) for engaging with the winding terminal portion 6b. Yes. That is, each conductor fixing mechanism 15 has the same shape, and the conductors 8 to 11 and the crimp sleeve 13 are fixed by a plurality of conductor fixing mechanisms 15 having the same shape. The conductors 8 to 11 are fixed and aligned by engaging with the conductor engaging grooves 14b. Since the conductors 8 to 11 are fixed at two locations by the conductor engaging grooves 14b, the electromagnetic vibrations of the conductors 8 to 11 are suppressed.

  In the stator of the rotating electric machine as described above, the conductors 8 to 11 are fixed by the conductor fixing mechanism 15, and each conductor is provided between the conductor engaging grooves 14b adjacent to each other in the width direction of the tooth portion 4c. Since the connection holding member engaging long groove 7b that can be engaged with the crimping sleeve 13 that is crimped to the connecting portion between the coil conductors 6 to 11 and the coil conductor 6 is provided, the shape of the conductor fixing mechanism 15 is unified in all phases. In addition to improving the work efficiency during assembly, the labor of management can be reduced and the production cost can be reduced.

  Further, since the conductors 8 to 11 are aligned on the flat surface portion 7a by the plurality of conductor engaging grooves 14b and the conductors 8 to 11 being engaged with each other, the interference between the conductors 8 to 11 can be reduced. Contact (short circuit) can be prevented and the quality as a stator can be stabilized.

  Here, in the stator of the conventional rotating electric machine, there is only one engagement portion between the insulating bobbin and the conductor holding resin molded product, and the conductor holding resin molded product is fixed to the insulating bobbin in an unstable state. When the external force acts on the conductor holding resin molded product, the force is concentrated on one place, and the conductor holding resin molded product or the insulating bobbin is easily damaged. On the other hand, in the stator of the rotating electric machine as described above, the fixing member mounting claw portions 7c and the fixing member mounting claw grooves 5a are provided at a plurality of locations of the lower conductor fixing member 7 and the insulating bobbin 5, respectively. Therefore, the conductor fixing mechanism 15 can be fixed to the insulating bobbin 5 more firmly than the stator of the conventional rotating electric machine, and the fixing strength of the conductor fixing mechanism 15 against impact and electromagnetic vibration can be strengthened. At the same time, since the length dimension of the fixing member attaching claw portion 7c and the depth dimension of the fixing member attaching claw groove 5a are equal to each other, the lower conductor fixing member 7 after the fixing is swung. (Gat) can be suppressed.

  Further, the conventional stator of a rotating electrical machine has a structure in which a part of the conductor holding resin molded product is fitted into the conductive wire winding portion of the insulating bobbin. For this reason, the radial connection space of the stator core in the conductor holding resin molded product has been narrowed. At the same time, the coil conductor lead-out location and the insulating bobbin interfere with each other, so that the work efficiency during assembly is reduced. On the other hand, in the stator of the rotating electrical machine as described above, the lower conductor fixing member 7 is disposed so as to bridge the upper surfaces of both ends of the insulating bobbin 5 in the radial direction of the stator core 4. Since the conductors 8 to 11 are placed on the flat surface portion 7a of the fixing member 7, interference between the end portion of the insulating bobbin 5 on the yoke portion 4b side and the winding start end portion 6a and winding end portion 6b is reduced. In addition, the connecting space in the radial direction of the stator core 4 can be widened, and the working efficiency during assembly can be improved.

  Furthermore, in general, when the assembly of each conductor / member is completed at the time of manufacturing the stator, a liquid insulating varnish is connected to the winding location and connection of the stator core in order to strengthen insulation between each conductor and strengthen mechanical strength. It is applied (attached) to the location and fixed. And in the stator of the conventional rotary electric machine, the upper surface of the resin molding product for conductor fixation (conductor holding resin molding product) has irregularities, and the insulating varnish tends to accumulate in the concave portions. For this reason, when the insulating varnish is solidified while remaining in the recess, the height of the entire stator may increase depending on the thickness of the insulating varnish. In addition, the amount of insulating varnish used was increased by the amount of insulating varnish accumulated in the recess. On the other hand, in the stator of the rotating electric machine as described above, when the stator core 4 is placed horizontally, the upper surface of the upper conductor fixing member 14 is inclined downward in the radial direction of the stator core 4. Since the insulating varnish flows downward from the upper surface of the upper conductor fixing member 14 when the insulating varnish is applied to the stator core 4, the height dimension of the upper conductor fixing member 14 can be minimized. . At the same time, since the insulating varnish does not accumulate on the upper surface of the upper conductor fixing member 14, the amount of the insulating varnish used can be reduced.

Embodiment 2. FIG.
In the first embodiment, the upper surface of the upper conductor fixing member 14 is inclined toward the lower side in the radial direction of the stator core 4, but the upper surface of the upper conductor fixing member 14 is horizontal as shown in FIG. A plurality of through-holes 14d may be provided on the upper surface. Even in this case, the same effect as in the first embodiment can be obtained.

  Moreover, although Embodiment 1 and 2 demonstrated the permanent magnet synchronous motor, this invention is applicable also to motors, such as an induction motor, for example.

  Furthermore, although Embodiment 1 and 2 demonstrated the stator of the electric motor, this invention is. It can also be applied to generator stators.

  Furthermore, in the first and second embodiments, the lower conductor fixing member 7 and the upper conductor fixing member 14 are formed of resin, but are not limited to resin, and other insulators or insulation processing is performed. Other members may be used.

  In the first and second embodiments, the conductor engaging groove 14b is used as the conductor engaging portion. However, the conductor engaging portion is not limited to the groove, and may have other shapes as long as it can be engaged with the conductor. There may be. Similarly, in the first and second embodiments, the connection holding member engaging long groove 7b is used as the connection location arrangement portion, but the connection location arrangement portion is not limited to the long groove, and the connection location between the conductors is determined. What is necessary is just to form the area | region which can be arrange | positioned.

It is a top view which shows the permanent magnet synchronous motor by Embodiment 1 of this invention. It is a top view which expands and shows the II line | wire 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 a perspective view which decomposes | disassembles and shows a part of FIG. It is a top view which expands and shows a part of permanent magnet synchronous motor by Embodiment 2 of this invention.

Explanation of symbols

  4 Stator Core, 4c Teeth, 4b Yoke, 5 Insulating Bobbin, 5a Claw Groove (Fitting Claw Groove), 6 Coil Conductor, 6a Winding End, 6b Winding End, 7 Lower Side Conductor fixing member, 7a flat surface portion, 7b connection holding member engaging long groove (connection portion engaging portion), 7c fixing member attaching claw portion (engaging claw portion), 8-10 each phase conductor (connection conductor), 11 common Conductor (connection conductor), 13 crimping sleeve (connection holding member), 14 upper conductor fixing member, 14b conductor engaging groove (conductor engaging portion), 14d through hole, 15 conductor fixing mechanism.

Claims (7)

An annular stator core having a yoke portion and a plurality of teeth portions which are arranged at intervals in the circumferential direction and project radially from the yoke portion;
A plurality of coil conductors which are provided in each of the above-mentioned teeth portions and form a coil of a plurality of phases;
The teeth portions are provided annularly along the circumferential direction of the stator core so as to pass between the teeth portions adjacent to each other, and are arranged at intervals in the radial direction of the stator core. A plurality of connection points provided so as to correspond to the positions of the connection conductors that are electrically connected to the ends of the coil conductors for each phase, and form a distribution circuit between the coil conductors in phase with each other, And a plurality of conductor fixing mechanisms provided in each of the teeth portions for fixing the connection conductors,
The conductor fixing mechanism is a plurality of conductors that are arranged at intervals in the radial direction of the stator core and that are arranged at intervals from each other in the width direction of the teeth portion and that are engaged with the connection conductor An engaging portion and a plurality of connecting portion engaging portions that are provided between the conductor engaging portions adjacent to each other in the width direction of the tooth portion and that can engage with the connecting portion; A stator of a rotating electric machine characterized by A plurality of cylindrical insulating bobbins attached to each of the teeth portions;
The coil conductor is wound around the teeth portion via the insulating bobbin,
The conductor fixing mechanism is provided with a plurality of engaging claws.
The insulating bobbin is provided with a plurality of engaging claw grooves each engageable with the engaging claw portion,
The stator of a rotating electric machine according to claim 1, wherein the conductor fixing mechanism is fixed to the insulating bobbin by engaging the engaging claw portion and the engaging claw groove with each other.   The stator of a rotating electric machine according to claim 2, wherein the conductor fixing mechanism is arranged so as to bridge the upper surfaces of both ends of the insulating bobbin in the radial direction of the stator core. A connection holding member that is attached to a connection location between the conductors and holds an electrical connection state between the conductors,
The conductor fixing mechanism is composed of an upper conductor fixing member and a lower conductor fixing member that are connected to each other vertically,
The upper conductor fixing member has a pair of side portions facing each other along the protruding direction of the teeth portion,
The conductor engaging portion is a conductor engaging groove provided at a distance from the lower ends of the pair of side surface portions of the upper conductor fixing member,
The connection portion engaging portion is a connection holding member engagement long groove provided on the upper surface of the lower conductor fixing member and engageable with the connection holding member. The stator of the rotary electric machine of any one of these.   The upper surface of the lower conductor fixing member has a flat surface portion that can contact the lower end surfaces of the pair of side surface portions of the upper conductor fixing member and on which the conductors are placed. The stator of the rotary electric machine according to claim 4.   The upper surface of the conductor fixing mechanism is inclined toward the lower side in the radial direction of the stator core when the stator core is placed horizontally. The stator of the rotary electric machine of any one of these. The inside of the conductor fixing mechanism is hollow,
The stator of the rotating electrical machine according to any one of claims 1 to 5, wherein a plurality of through holes penetrating from the outside to the inside are provided on an upper surface of the conductor fixing mechanism. .

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