JPS6062843A - Winding mounting structure of ac rotary machine - Google Patents

Abstract

PURPOSE:To enable to use a taping machine by increasing the width between coil sides in slots to the pitch of poles or larger. CONSTITUTION:Former-wound coils 3 of full coils are mounted in slots 2 formed on a core 1. One coil side 3a of the coil 3 is arranged in #0 slot, and the other coil side 3c is arranged in a slot number larger by s than the pitch (n) of the poles, i.e., #11 slot. Thus, the width of the coil increases, a taping machine for coating an insulating tape can be used to shorten the number of taping steps and to obtain uniform coil insulator.

Description

[Detailed description of the invention] <Technical field of invention> The present invention relates to a winding mounting structure for an AC rotating machine.

<Prior Art> Figure 1 shows a conventional mounting structure for windings in a high-voltage, low-speed, multi-pole AC rotating machine. That is, in the figure, 1 is an iron core, 2 is a slot provided in the iron core 1, and 3 is a full-coil pattern-wound coil, which is installed in the slot 2.

31 is one coil side of the coil 3 and is arranged in the φ0 slot. 3b is the other coil side of coil 3, l pole @
= 2 in the example)
7 slots, which are the slots with the lowest number.

In short, such conventional winding companies employ a so-called short-pitch winding structure in which the width between the sides of the coil (coil pitch) in the coil straddle or slot is shorter than the pole pitch.

The effective number of turns of the rotating machine winding is adjusted by a combination of a method using the number of turns of the coil and a fine adjustment using the coil span, that is, the short section coefficient.

By the way, in the winding of a high voltage rotating machine, as shown in FIG. 2, insulation tape is wound around the outer periphery of the coil conductor 4 to provide insulation. As the rated voltage increases, the required insulation thickness also increases, and a taping machine is used to tape the insulation tape.

However, as the number of poles increases, the pole pitch becomes smaller and the coil width W shown in FIG. The problem arises that it disappears.

Since taping machines could no longer be used, insulating tape was wound by hand, but hand-wrapping required several times the number of man-hours compared to mechanical winding, and was highly unpopular due to the force exerted by the workers.

In addition, manual winding has the disadvantage that it is difficult to obtain a uniform insulating tape tension as with machine winding, and the insulating properties vary widely.

Furthermore, manual winding, such as when it is necessary to wind the insulating tape under high tension, may cause muscle pain.

Note that with so-called half coils in which the coil sides 3a and 3b are not connected, a taping machine can be used regardless of the coil pitch, but full coils require more man-hours to connect and insulate after inserting the coils. good.

<Summary of the Invention> In view of the above-mentioned conventional problems, the present invention makes it possible to use a taping machine by making the width between the coil straddles, that is, the width between the coil sides in the slot, larger than the pole pitch. The present invention provides a winding mounting structure for an AC rotating machine that allows for a wide reduction in insulation taping man-hours and ensures uniform coil insulation.

<Embodiment of the Invention> An embodiment of the present invention will be described below with reference to FIGS. 4 and 5.

In FIG. 4, the same elements as those in FIG. 1 are given the same reference numerals to simplify the explanation.

In FIG. 4, the coil side 3c has a slit number K which is 8 (2 in this example) greater than the pole pitch n, that is, n+8 (◆11 in this example) K, and the coil side 3m has 0 slots.

In this way, the span of coil 3 is n+8, which is n compared to the span of the conventional coil (j) n -s.
It becomes 10s/n-m times (9+1 2/9-2=y=1.57 times in this example). Therefore, the width W of the coil 3 is also approximately 1.57 times larger, resulting in a wider coil 3.

Here, the fifth factor indicates a vector of voltages generated in the coils according to the conventional example and the present invention, and hEa is the coil side 3a.
Eb indicates the voltage generated at the coil side 3b, and Ee indicates the voltage generated at the coil side 3C.

Then, 1Eal=1Ebl=1Eel and in the conventional volume, as is clear from the figure, 1Eabl=1Eael and Kfb=Kfc.

In this way, move the coil from the φ0 slot to 1 pole per slot, which is equal to several slots, and from the slot to the h slot before the +
Even if what was placed in the (ns) slot is placed in the (n+s) slot eight slots ahead, the short section coefficients Kf will be the same.

According to this configuration, the straddle of the coil 3 is arranged at a pole pitch n
By increasing the width of the coil, in particular by changing the span of the coil from ns to n+8, a wide coil 3 can be obtained as described above without changing the short section coefficient. As a result, a taping machine that wraps the insulating tape around the outer periphery of the coil 3 can be used without any problem.

This greatly reduces taping man-hours, ensures uniform coil insulation, and eliminates unforeseen situations such as muscle pain for workers, which is the case when winding insulating tape with high tension by hand. There is no fear that it will occur.

<Effects of the Invention> As explained above, the present invention is arranged so that the width between the sides of the coil in the slot is larger than the pole pitch. This makes it possible to use a taping machine, thereby greatly reducing the number of taping steps, ensuring uniform coil insulation, and eliminating the inconveniences of manual taping.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an example of conventional coil arrangement, Fig. 2 is a sectional view of the above coil, Fig. 3 is a plan view showing the relationship between the above coil and the taping machine, and Fig. 4 is a plan view of the coil according to the present invention. FIG. 5, which is a plan view showing an example of coil arrangement, is a vector diagram of voltages generated in the coils according to the conventional example and the present invention. 2... Slot 3... Coil 3a... Coil Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Procedural amendment 1, Indication of case Japanese Patent Application No. 170675/1988 2, Title of the invention Winding attachment structure for AC rotating machines 3, To the person making the amendment Representative Hitoshi Katayama Part B, Contents of the amendment (1) 1 fatigue in the 4th line of page 8 of the specification, 1 fatigue,
1゜ (2) On page 8 of the specification, line 9, 1 muscle pain, amend it as 1 muscle pain. 1. (3) On page 4, line 1 of the specification, 1 contraction. There is one reduction wt
Correct with J. (4) Page 4, line 11 of the specification, page 4, lines 18 to 1
In line 4, page 6, lines 16 to 16, 'n+sJ' is corrected to '(n+s)J'. (6) 'n on page 4, line 14 of the specification and page 6, line 16 of the specification.
-5J is corrected to '(n-s)yo. (6) On page 4, line 16 of the specification, 'n+s/n-s times' is corrected to '(n+s)/(n-s) times'. (7) “9+2 /” on page 4, line 16 of the specification
:9-g)=! -! =1.677L and 8 positive −r;E
:r. that's all

Claims (1)

[Claims] A winding mounting structure for an AC rotating machine using a full-coil shape-wound coil, characterized in that the width between the coil sides in the slot is larger than the pole pitch.