JPS60139141A - Armature winding of rotary electric machine - Google Patents

Abstract

PURPOSE:To prevent adjacent conductors from contacting therebetween without particularly reinforcing its insulation by constructing to bend lead wirings radially of an armature at approx. 90 deg. with respect to the widthwise plane of the oblique side of a winding. CONSTITUTION:Four conductors are superposed vertically radially of an armature to be shaped in a hexagonal shape, and a flat portion 2F is formed by pressing so that the size l4 of a winding conductor 2 inserted into the width T2 of the groove 7a of a commutator segment 7 become the same size as the width T2 of the groove 7a of the segment 7 and the thickness of the conductors becomes T5 in the plane parallel to the direction of the width CV of the conductor. The entire linear leads l4 at the end of the winding are bent radially of the armature at approx. 90 deg. at the position of the bent Q of the leads l4 and the oblique portion l5 of the winding so as to be inserted to the width T2 of the groove 7a of the segment 7. Thus, a shortcircuit between layers can be prevented.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an armature winding of a rotating electric machine, such as a DC motor, which is formed in a hexagonal disk, and the outlet end thereof is formed into a recessed commutator piece. The present invention relates to an armature winding of a rotating electric machine connected to a groove.

[Background of the invention]

Generally, in DC motors used for electric trains, the arrangement of the conductors of the armature windings housed in the armature core groove increases the occupation rate of the armature core groove and reduces the eddy electrolysis loss of the conductor. In order to achieve this, a method is adopted in which the armature core grooves are arranged in one row in the middle direction (circumferential direction) and the armature core grooves are arranged in multiple rows in the height direction (radial direction).

In this case, as shown in FIG.
The armature winding 1 consists of a winding straight part 1a and a winding oblique part 1b.
It is molded into a tortoise-shell shape, and the rising straight portions at both ends are connected to commutator pieces (not shown), respectively. This connection is performed by inserting the straight part of the end of the armature winding into the groove of the commutator piece. Both ends of 10 are machined by a mold so that they have the same dimensions as the commutator piece concave grooves, and a cross-sectional change part 2S is formed from the conductor width CW as shown in Fig. 2.
After that, a flat part 2F is formed.

By the way, since a plurality of the winding conductors 2 are usually used in combination, each of the winding conductors 2 is provided with interlayer insulation 3 using an insulating material such as glass tape, as shown in FIG. There is. However, as mentioned above, when attempting to form a wire-wound conductor by pressing, this glabellar insulation 3 is also pressed and peeled off from the surface of the conductor, and if used as is, it will damage the adjacent wire-wound conductor 2, especially the winding. Conductor 2 and flat part 2
The cross-sectional change portions 2S and F come into contact with each other, causing an interlayer short circuit. Therefore, it was necessary to strengthen the interlayer insulation by wrapping, for example, an insulating tape around the part where the interlayer insulation 3 has peeled off. However, reinforcing the interlayer insulation by winding this insulating tape is performed on all the winding conductors, which requires a large amount of man-hours.

On the other hand, the order in which the flat portions 2F of each insulated conductor 2 are connected to the commutator pieces is as shown in FIG.
For example, from top to bottom aI b, c.

CI ald, b, f,
It is devised to connect them in the order of h, e, and g, regardless of the vertical arrangement order. However, even if such a device is applied, the same
As shown in Figures 4 and 5, the vicinity of the Q part between 7 and the 8 part between f-21 is in the winding conductor, which includes the thickness of the interlayer insulation reinforced with respect to the commutator piece pitch L3. If ZW is large, the winding conductors 2 will overlap by a dimension t1 in the circumferential direction. In this case, even if the 21 dimension overlaps, a gap t3 can be secured in the radial direction, there is no contact between adjacent winding conductors 2 and there is no problem. If the gap t3 changes easily, there is a risk that adjacent windings will come into contact with each other, resulting in galling, which may lead to a short circuit between the υ layers. Therefore, a reinforcing insulator 4 is inserted into the gap L3 to prevent the occurrence of an interlayer short circuit, but the reinforcing insulator 4 is likely to move or fall off, causing an interlayer short circuit.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned points, and its purpose is to prevent contact between adjacent winding conductors without special insulation reinforcement, and to prevent interlayer short circuits from occurring in rotating electric machines. It is to provide a child winding.

[Summary of the invention]

The present invention is integrated with the straight part housed in the groove of the armature core, and extends from the end of the armature core in the υ-axis direction and forms a diagonal winding hypotenuse part parallel to the straight part. A sunrise straight section extending in the direction and having its tip connected to the groove of the commutator piece is bent approximately 90' in the armature radial direction with respect to the widthwise surface of the winding oblique side section. In fact, it was designed to achieve the intended purpose.

[Embodiments of the invention]

Hereinafter, the present invention will be described in detail based on embodiments of the drawings. Incidentally, the same reference numerals are used for the same parts as in the past.

In the armature winding 1 of this embodiment, as shown in FIG. An arrangement with four rows in the horizontal direction H will be explained. The cross-sectional area of each conductor forming the armature winding 1 at this time is determined by the required characteristics of the rotating electric machine, and is determined by the thickness T1 and width CW of the conductor.
The thickness T1 is shown in FIG. 7 because it can be arbitrarily selected within the cross-sectional area of the conductor. The pitch between the concave grooves 7a of the commutator piece 7 is t3-α (α is the gap to ensure that adjacent comrades do not come into contact with each other), and the width CW is calculated by dividing the cross-sectional area ÷ the thickness T1 by the conductor dimension metal. decide.

Thereafter, as shown in FIG. 8, the four conductors are stacked vertically in the armature radial direction to form a hexagonal shape, and the opening of the winding conductor 2 is inserted into the groove 7a width T2 of the commutator piece 7. Projecting end dimension t4
Each is press-worked so that it has the same dimension as the width T2 of the concave groove 7a of the commutator piece 7, and the thickness of the conductor is T5 in a plane parallel to the CW direction in the conductor to form a flat part 2F. (This state is shown in FIGS. 9 and 10). but,
In this state, as shown in FIGS. 9 and 10, the conductor remains pressed in a plane parallel to the CW direction, so it cannot be inserted into the groove 7a width T2 of the commutator piece 7.

For this reason, so that it can be inserted into the width T2 of the concave groove 7a of the commutator piece 7, the straight line portion t4 of the winding end and the oblique side portion t of the winding
At the sO curve line Q position, the entire sunrise straight section t4 is bent approximately 90 degrees in the armature radial direction (this state is shown in FIGS. 11 and 12).

At this time, the pitch between the rising edges of the bent portion Q and the adjacent openings is t2
is made to have the same dimension as the pitch t3 between the concave grooves 7a of the commutator piece 7. Thereafter, as shown in FIGS. 13(a) and 13(b), the electric machine prewinding i1!1 is stored in the groove of the armature core 5, and the sun crushing portion T5 is stored in the groove 7a of the commutator piece 7. Connecting. Sunrise array after connection! When viewed from one side of Ryuko,
As shown in Fig. 14, since the conductor thickness T1 is set in advance to the commutator piece groove pitch t3-α, a gap of α is secured between adjacent Hiji comrades, which is applied to the conductor during press working. 1. Even if the interlayer insulation 3 is simultaneously crushed and peeled off from the conductor surface of the pressed part, 1. In the press section, there is no contact between comrades at Hide, and there is no risk of short circuits between layers due to comrades' steering. after that,
As shown in FIGS. 13(a) and 13(b), if a bind tape 8 is wrapped around the outer periphery of the armature winding 1 extending from the armature core 5 to the commutator piece 7, and the entire body is vacuum impregnated with phenol,
Since the gap α between the comrades is also filled with phenol, the connection between the commutator piece 7 and the radiator becomes strong.

Furthermore, in the conventional structure, the CWO conductor layer had to be crushed so that it could be inserted into the recessed groove of the commutator piece. This resulted in the creation of a weak point at the base of the pressed part, but in this example, the conductor thickness is pressed so that the dimensions are the same as the concave groove dimensions of the commutator piece in the T1 direction, so the difference in level between the conductor thickness T1 and the crushing is minute. Therefore, processing deterioration of the press section can be significantly reduced.

Next, another embodiment of the present invention will be described.

The conductor cross-sectional area of the armature winding 1 is determined by the ice-making characteristics of the rotating electric machine, and the conductor thickness T1 and width CW are determined by the same -
As mentioned above, it can be arbitrarily determined within the cross-sectional area.
In this embodiment, the thickness of the wire inserted into the groove of the commutator piece and the thickness of the winding conductor are made the same size as the groove of the commutator piece, and then the straight part of the coil is bent at 90 degrees. That is, the thickness T5 of the straight part inserted into the groove of the commutator piece is formed to be the same as the thickness of the winding conductor 2 (this state is shown in FIG.
(shown in FIG. 16), and then the straight line portion t4 of the winding end.
and the winding hypotenuse part 1. At the bend Q position part, the sunrise straight part t
4 is bent approximately 90 degrees in the radial direction of the armature (this state is shown in Figure 17).

(9) Shown in Figure 18). At this time, the pitch t2 between the nine adjacent rising edges of the bent portion Q is the same as the pitch t3 between the concave grooves 7a of the commutator piece 7 shown in FIGS. 19(a) and 19(b). Do it like this. Thereafter, as shown in FIGS. 19(a) and 19(b), the armature winding 1 is housed in the groove of the armature core 5, and the sunrise straight part is housed and connected to the concave groove 7a of the commutator piece 7. do. The 20th sunrise arrangement after connection is viewed from one side of the commutator.
It is a diagram.

According to this embodiment, the conductor can be inserted into the concave groove of the commutator piece without pressing, and there is no need to carry out maintenance work because the conductor is exposed. There will be no damage at all. 1° Furthermore, in the case of the conventional structure, as shown in Fig. 2, a flat portion 2F is formed at the tip of the sun so that it can be inserted into the groove T2 of the commutator piece shown in Fig. 7 from the conductor width direction CW. Because it is crushed so thinly, the amount of deformation during pressing is very large, and the sudden pressure applied during crushing causes the section 2S to change in cross section.
This will result in significant processing defects. Therefore, it is necessary to ensure a sufficient dimension PL from the conductor width CW to the flat part 2F at the sunrise end in advance to alleviate processing deterioration so as not to put a burden on the cross-sectional change part (10) 2S. . The cross-sectional change dimension PL at this time is determined by the ratio of the conductor width CW and the sunrise thickness T5, and is generally 10 to 20 m.

For this reason, the straight part of the opening is long υ, in other words, the first straight part is long.
As shown in Figure 9, the armature-uniaxial dimension t6 on the side of the commutator piece 7 that overhangs the armature core 5 becomes longer, which is a major obstacle in reducing the size and weight of rotating electric machines. According to the embodiment, since the outlet can be inserted into the groove T2 of the commutator piece without pressing the outlet end, there is no damage to the interlayer insulation 3 caused by the pressed part9, and the commutator piece 7
The armature winding axial dimension t6 on the side can also be shortened since pressing work between the straight sections is not required.

〔Effect of the invention〕

According to the armature winding of the rotating electric machine of the present invention explained above,
! (1i) is integral with the straight part housed in the groove of the root core, and extends in a direction parallel to the straight part from the oblique side part of the winding extending in the axial direction from the end of the armature core; The straight line part, the tip of which is connected to the concave groove of the commutator piece, is approximately 90 degrees with respect to the widthwise surface of the oblique side part of the winding.
° Since the armature is bent in the radial direction, adjacent conductors do not come into contact with each other, and short circuits between layers can be prevented without special insulation reinforcement, making it possible to obtain highly reliable electrical pre-winding IT. can.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a conventional armature winding formed in a hexagonal shape, Fig. 2 is a partial perspective view showing the end of the winding conductor immediately after processing, and Fig. 3 is a flat part of the armature winding. FIG. 4 is a plan view showing the arrangement between adjacent winding conductors in the conventional method, FIG. 5 is a cross-sectional view taken along line 1 in FIG. FIG. 7 is a front view of a commutator piece to which the armature winding of the present invention is connected, and FIG. (12) A perspective view showing an embodiment of the armature winding according to the invention, (12) Fig. 9 is a plan view showing the armature winding after sunrise pressing of the winding string of this embodiment, and Fig. 10 shows the sunrise press of the winding string of this embodiment. FIG. 11 is a partial perspective view showing details of the armature winding according to the present embodiment, and FIG.
10 is a partial perspective view showing details of the sunrise part in FIG. 10, FIG. 13(a) is a side view showing a state in which the sunrise part of the armature winding is inserted into the commutator piece groove according to this embodiment, Figure 13(b) is (
14 is a front view of FIG. 13 seen from one side of the rectifier; FIG. Figure 16 is a partial perspective view showing details of the sunrise part in Figure 15; Figure 17 is a plan view showing the armature winding after bending the sunrise part in the armature radial direction;
Figure 8 is a partial perspective view showing details of the sunrise part in Figure 17;
Figure 9 (11) is a side view showing the state in which the armature winding is inserted into the commutator piece groove according to this embodiment, Figure 19 is a sectional view of (a), and Figure 20 is a cross-sectional view of (a). 19 is a front view of FIG. 19 viewed from one side of the commutator. DESCRIPTION OF SYMBOLS 1... Armature winding, 2... Winding conductor, 3... Interlayer insulation, 4... Reinforcement insulator, 5... Armature core, 6...
... Armature 'iron (13) 6 grooves, 7... Commutator piece, 7a... Commutator piece concave groove, 8
...Glass bind. Agent Patent attorney Akio Takahashi (14)

Claims (1)

[Scope of Claims] 1. A straight part accommodated in a groove of the armature core, and a winding integral with the straight part extending obliquely from the end of the armature core in the υ-axis direction. The line oblique side part and the outlet straight part extending from the winding oblique side part in a direction parallel to the straight line part and whose tip end is connected to the groove of the commutator piece are formed into a "turtle shell shape". , and in the armature winding of a rotating electrical machine in which the cross-sectional dimension of the winding conductor is smaller in the thickness direction than in the width direction, the sunrise straight portion is approximately 90 degrees with respect to the plane in the width direction of the winding hypotenuse portion.
``An armature winding of a rotating electric machine, characterized in that it is bent in the armature radial direction. 2. The winding conductor has a thickness larger than the commutator piece groove, and the thickness of the winding conductor is larger than the commutator piece groove, and The nine straight straight parts are machined so that they have the same dimensions as the commutator piece concave grooves, and the nine straight straight parts are approximately 90 degrees with respect to the widthwise surface of the winding oblique side.
``The electric machine winding of a rotating electric machine according to claim 1, characterized in that it is bent in the radial direction of the armature. 3. The winding conductor is formed to have the same thickness as the commutator piece recessed groove, and the straight line portion of this dimension is approximately 90″ from the widthwise surface of the winding oblique side portion of the armature. An armature winding for a rotating electric machine according to claim 1, characterized in that the armature winding is bent in a radial direction.