JP2016036203A - Stator of dynamo-electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress decrease in the connection strength of a coil and a power line.SOLUTION: Support brackets 46-1, 46-2 are connected with a power line fastening member 44 for fastening three-phase power lines 42U, 42V, 42W, and the power line fastening member 44 is fixed to a stator core 21 via the support brackets 46-1, 46-2. Consequently, the eigen value (eigen frequency) of the power line fastening member 44 increases, thus suppressing decrease in the connection strength of the connection terminals 32U, 32V, 32W of segment coils 22U, 22V, 22W and one ends 52U, 52V, 52W of the power lines 42U, 42V, 42W by welding, due to resonance of the power line fastening member 44.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a stator for a rotating electrical machine, and more particularly to a stator having a power line connected to a coil.

  In the stator of Patent Document 1 below, a power line fastening member that fastens three-phase power lines is provided on a three-phase power line having one end connected to a coil and the other end serving as a connection terminal.

JP 2013-172575 A JP 2011-259654 A

  In Patent Document 1, since the terminal is connected with the power line fastening member floating in the air, when the power line fastening member has a low natural value (natural frequency) and resonates due to vibration, the coil and power line Connection strength may be reduced.

  The stator of the rotary electric machine which concerns on this invention aims at suppressing the fall of the connection strength of a coil and a power line.

  The stator of the rotating electrical machine according to the present invention employs the following means in order to achieve the above-described object.

  A stator of a rotating electrical machine according to the present invention includes a stator core, a three-phase coil wound around the stator core, a three-phase power line having one end connected to the coil and the other end serving as a connection terminal, and a three-phase A power line fastening member for fastening the power line, and a support member is coupled to the power line fastening member, and the power line fastening member is fixed to the stator core via the support member.

  In one aspect of the present invention, it is preferable that the support member is bolted to the fastening portion of the stator core.

  According to the present invention, since the power line fastening member that fastens the three-phase power line is fixed to the stator core via the support member, a decrease in the connection strength between the coil and the power line can be suppressed.

It is a perspective view which shows the example of whole structure of the stator which concerns on embodiment of this invention. It is a perspective view which shows the example of whole structure of the stator which concerns on embodiment of this invention from another angle. It is a figure which shows the structural example of power line 42U, 42V, 42W and the power line fastening member 44. FIG. FIG. 6 is a diagram showing another configuration example for fixing a power line fastening member 44 to the stator core 21. It is an enlarged view of the support bracket end part of FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings.

  1-3 is a figure which shows schematic structure of the stator of the rotary electric machine which concerns on embodiment of this invention, FIG.1, 2 shows the structural example of the whole stator, FIG. 3 shows power lines 42U, 42V, 42W, and The structural example of the power line fastening member 44 is shown. 1 and 2, the configuration of the stator core 21 and the segment coils 22U, 22V, and 22W is partially omitted with respect to the stator circumferential direction, but the configuration of the remaining portions that are not illustrated is illustrated. The configuration is the same as that of the portion.

  The stator includes a stator core 21, three-phase segment coils 22U, 22V and 22W wound around the stator core 21, and a three-phase power line 42U electrically connected to the three-phase segment coils 22U, 22V and 22W. , 42V, 42W and a power line fastening member 44 for mechanically fastening the three-phase power lines 42U, 42V, 42W to each other. The stator core 21 includes an annular yoke 23 that extends along the circumferential direction of the stator, and a plurality of teeth 24 that project from the inner circumferential surface of the yoke 23 toward the inside in the stator radial direction (the rotor side not shown). The plurality of teeth 24 are arranged at regular intervals (equal intervals) in the stator circumferential direction. Slots are formed between the teeth 24 adjacent in the stator circumferential direction, and the segment coils 22U, 22V, and 22W are wound around the teeth 24 through the slots. The one end portions 32U, 32V, 32W of the segment coils 22U, 22V, 22W are bent from the stator radial direction to the stator axial direction, and the one end portions 52U, 52V, 52W of the power lines 42U, 42V, 42W are electrically connected, respectively. It functions as a connection terminal to be connected. The connection terminals (one end portions) 32U, 32V, 32W of the segment coils 22U, 22V, 22W are spaced apart from each other in the stator circumferential direction, and the connection terminal 32U, the connection terminal from one side to the other side in the stator circumferential direction. They are arranged in the order of 32V and connection terminal 32W.

  One end 52U of the power line 42U is joined to the connection terminal 32U of the segment coil 22U by welding, one end 52V of the power line 42V is joined to the connection terminal 32V of the segment coil 22V by welding, and one end 52W of the power line 42W is It is joined to the connection terminal 32W of the segment coil 22W by welding. Connection terminals 62U, 62V, and 62W, to which an external electric circuit such as an inverter is electrically connected, are provided at the other ends of the power lines 42U, 42V, and 42W, respectively. Each power line 42U, 42V, 42W is covered with an insulating film except for one end 52U, 52V, 52W and connection terminal (other end) 62U, 62V, 62W.

  The power line fastening member 44 is disposed on the outer peripheral side of the stator core 21. The power line fastening member 44 is formed with three power line insertion holes, and the three-phase power lines 42U, 42V, 42W are between the one end 32U, 32V, 32W and the other end 62U, 62V, 62W. The intermediate portion is fixed to the power line fastening member 44 in a state of being inserted into the three power line insertion holes. Thereby, the three-phase power lines 42U, 42V, 42W are mechanically fastened. As the power line fastening member 44, for example, an insulating material such as a resin can be used.

  In the present embodiment, one end portions 46-1a and 46-2a of support brackets (support members) 46-1 and 46-2 are connected to the power line fastening member 44, and the support brackets 46-1 and 46-2. The other end portions 46-1b and 46-2b are connected to the stator core 21. Thus, the power line fastening member 44 is fixed to the stator core 21 via the support brackets 46-1 and 46-2. In the example of FIGS. 1 and 2, the other end portions 46-1b and 46-2b of the support brackets 46-1 and 46-2 are connected to the stator axial direction one end surface 23a of the yoke 23. For example, welding can be used for joining the support brackets 46-1 and 46-2 and the power line fastening member 44 and joining the support brackets 46-1 and 46-2 and the stator core 21 (yoke 23). is there. In the example of FIGS. 1 and 2, the support bracket 46-1 is located on the one side in the stator circumferential direction from the support bracket 46-2. In the support bracket 46-1, the stator circumferential direction position of the other end portion (connecting portion with the stator core 21) 46-1b is more stable than the stator circumferential position of one end portion (connecting portion with the power line fastening member 44) 46-1a. It is inclined and extended with respect to the stator radial direction so as to be located on one side in the circumferential direction. In the support bracket 46-2, the stator circumferential direction position of the other end portion (connection portion with the stator core 21) 46-2b is set to the stator from the stator circumferential direction position of one end portion (connection portion with the power line fastening member 44) 46-2a. Inclined and extended with respect to the stator radial direction so as to be positioned on the other side in the circumferential direction.

  According to this embodiment described above, by fixing the power line fastening member 44 to the stator core 21 by the support brackets 46-1 and 46-2, the natural value (natural frequency) of the power line fastening member 44 is increased and the strength is increased. Can be improved. Therefore, the joint strength by welding of the connection terminals 32U, 32V, 32W of the segment coils 22U, 22V, 22W and the one end portions 52U, 52V, 52W of the power lines 42U, 42V, 42W is reduced by the resonance of the power line fastening member 44. Can be suppressed.

  Further, in a state where the power line fastening member 44 is fixed to the stator core 21 by the support brackets 46-1, 46-2, the connection terminals 32U, 32V, 32W of the segment coils 22U, 22V, 22W and the power lines 42U, 42V, 42W By joining the one end portions 52U, 52V, and 52W by welding, warping of the connection terminals 62U, 62V, and 62W of the power lines 42U, 42V, and 42W can be suppressed. Therefore, the position accuracy of the connection terminals 62U, 62V, 62W of the power lines 42U, 42V, 42W can be improved. As a result, the process of correcting the warping of the connection terminals 62U, 62V, 62W with a correction jig after welding becomes unnecessary.

  Other configuration examples for fixing the power line fastening member 44 to the stator core 21 are shown in FIGS. 4 and 5, the stator core 21 swells outward from the outer peripheral surface of the yoke 23 in the radial direction of the stator, and a bolt insertion hole 27 for passing a fastening bolt (fastening member) is provided along the stator axial direction. A formed fastening part (ear part) 26 is further included. A bolt insertion hole 47 for passing a fastening bolt is formed in the other end portion 46-1b of the support bracket 46-1. Further, a claw portion 48 is formed on the other end portion 46-1b of the support bracket 46-1. In the state where the other end portion 46-1b of the support bracket 46-1 is superimposed on one end surface in the stator axial direction of the fastening portion 26 so that the bolt insertion hole 27 and the bolt insertion hole 47 are connected, the fastening bolt is inserted into the bolt insertion hole 27. , 47 and fastening to a casing (not shown), the stator core 21 can be fixed to the casing, and the other end portion 46-1b of the support bracket 46-1 is bolted to the fastening portion 26 of the stator core 21. Can do. Until the support bracket 46-1 is fixed to the stator core 21 by the fastening bolt, the position shift of the support bracket 46-1 is prevented by inserting the claw portion 48 into the slit hole formed in the fastening portion 26. 4 and 5 show a configuration example in which the other end portion 46-1b of the support bracket 46-1 is bolted to the fastening portion 26 of the stator core 21, but the other end portion 46-2b of the support bracket 46-2 is used. The configuration example in which the bolts are fastened to the fastening portion 26 of the stator core 21 is also the same.

  4 and 5, the stator core 21 can be fixed to the casing and the power line fastening member 44 can be fixed to the stator core 21. The support brackets 46-1 and 46-2 and the stator core 21 are welded. The process of joining becomes unnecessary. As a result, the number of steps for fixing the power line fastening member 44 to the stator core 21 can be reduced.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to such embodiment at all, and it can implement with a various form in the range which does not deviate from the summary of this invention. Of course.

  21 stator core, 22U, 22V, 22W segment coil, 23 yoke, 24 teeth, 26 fastening portion, 27, 47 bolt insertion hole, 32U, 32V, 32W, 62U, 62V, 62W connection terminal, 42U, 42V, 42W power line, 44 Power line fastening member, 46-1, 46-2 Support bracket, 48 claw part, 52U, 52V, 52W One end part.

Claims (2)

A stator core;
A three-phase coil wound around a stator core;
A three-phase power line having one end connected to the coil and the other end being a connection terminal;
A power line fastening member for fastening a three-phase power line;
With
A support member is connected to the power line fastening member,
A stator of a rotating electrical machine, wherein a power line fastening member is fixed to a stator core via a support member. A stator for a rotating electrical machine according to claim 1,
A stator of a rotating electrical machine, wherein a support member is bolted to a fastening portion of a stator core.

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