JPS5932185Y2 - armature winding - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in an armature winding in which a coil is housed in a concentric winding around an iron core of an AC rotating electric machine.

In constant current rotating electric machines such as cage conduction motors, the armature winding is constructed by winding and storing multiple coils in slots cut into the iron core, but conventional examples in which the armature windings are arranged in concentric windings Figure 1 and Figure 2 are both three-phase quadrupole machines with 48 slots, and Figure 1 is an all-pole type in which the number of coils per phase is the same as the number of poles. FIG. 2 is a winding diagram in the case of a half-polar winding in which the number of coils per phase is 172, which is the number of poles.

3 and 4 are cross-sectional views of the main parts of the core and coil end with the windings shown in FIGS. 1 and 2, respectively, and FIG. FIG. 4 shows a cross section taken along the line rv-tQ in FIG. 2.

In FIGS. 1 to 4, 1 to 48 indicate slot numbers, and 51 indicates an iron core.

Then, the coil stored in the iron core 51 first, with the coil end disposed on the outside, is designated 52, the middle coil is designated 53, and the inside coil is designated 54.

In the all-pole winding, as shown in FIGS. 1 and 3, the outer coil 52 consists of two unit coils 52a, the middle coil 53 and the inner coil 54 each have two unit coils 53a. 54a, there is one winding for the - phase in slots 3.4 and 13, 14, as shown by the solid line.
Similarly, four are arranged for each number of poles, one for slots 15, 16 and 25.26, one for slots 27.28 and 37.38 (not shown), and one for slots 39, 40, 1, and 2 (not shown). are doing.

When storing the coils in the iron core 51, the phase coil 52 shown by the dotted line is stored first, then the coil 53 shown by the two-dot chain line, and finally the phase coil 54 shown by the solid line. As shown in FIG. 3, the coil ends are arranged in three stages, with a coil 52 on the outside, a coil 53 in the middle, and a coil 54 on the inside.

Next, in the case of a half-polar winding, as shown in FIGS. 2 and 4, the winding for one phase is connected to the slot 1.2 as shown by the solid line.
, 3, 4 and 13, 14, 15゜16, slot 2
5, 26, 27, 28 and slots 37, 38 (not shown)
, 39, and 40, and are arranged in separate poles, so this is 1/2 of the number of poles.

The coils 54 and 52 are each composed of four unit coils 54a and 52a, and since the coils 52 and 54 are first housed in the iron core 51, the ends of these coils are arranged as shown in FIGS. 2 and 4. A coil 52 is placed on the outside and a coil 54 is placed on the inside, but unlike the all-pole type winding, there is no intermediate coil, and there are large gaps between the slots 17 to 24 and the clocks 148 to 400 (not shown).

In this way, in the above-mentioned all-pole type winding shown in FIG. 1 in which a coil is arranged for each pole, the coil pitch is 4 to 13 slots.
, 3 to 14, so the average circumference of the coil can be shortened, which has the advantage of shortening the coil ends and reducing the amount of copper wire, but since the coil ends overlap in three stages as shown in Figure 3. There is a drawback that the bending angle, that is, the amount of deformation of the outer coil 52 becomes large, making it difficult to store the coil.

Furthermore, an outer coil 52 and an intermediate coil 53 . If the same winding form is used for winding the inner coil 54, the inner coil 54, which has little deformation, will protrude longer than the outer coil 52, which has a large deformation. is extremely deformed, so that the coil end of the outer coil 52 is
There is a drawback that the base of the iron core presses on a slot insulator (not shown) provided on the end face of the core, and this slot insulator is easily damaged, resulting in poor insulation.

In addition, in order to prevent this, the winding form is changed and the outer coil 52 is
If the coil circumference of the middle coil 53 is set as a dog, and the inner coil 54 is made smaller, as shown in FIG. The coil ends of the outer coil 53 and the outer coil 52 do not need to be extremely deformed.

However, in this case, the circumferential length of each winding becomes unequal, so the winding resistance also becomes unequal, resulting in an unbalanced winding, so during operation,
This is undesirable because a negative sequence current is generated, the temperature rises significantly, and the efficiency also decreases.

Next, in the case of a half-polar winding, as shown in FIGS. 2 and 4, the coil end of the winding housed in the iron core 51 is located outside the coil
2 and the inner coil 54, the iron core 51 can be easily inserted into the slot, and the amount of deformation of the outer coil 52 is smaller than that of the all-pole winding shown in Fig. 3 above, resulting in slot insulation. Although the worry of damage to objects is reduced, the average circumference of the winding coil is that the coil pitch is 4 to 13 slots, 3 to 14 slots.
, 2 to 15, and 1 to 16, the number of unit coils in one coil is doubled to 4, so it is longer than an all-pole type winding, so the amount of copper wire is increased, and the length of the coil end is longer than an all-pole type winding. Since it is longer than the winding, it has the disadvantage that the overall length of the rotating electrical machine becomes longer.

The purpose of this invention was to improve the above-mentioned drawbacks of the conventional winding wire.The protruding length of the coil end of each coil is made the same, and the circumferential length of the coils is made the same, so that the characteristics are excellent and assembly is easy. An object of the present invention is to provide an armature winding for a rotating electric machine.

About the present invention An example of a three-phase quadrupole machine has four slots.
This will be explained with reference to the winding diagram in FIG. 5 showing the arrangement of eight concentric windings and the sectional view taken along the arrow 5--tube line in FIG. 6.

The coil to be wound and stored in the slot of the iron core 51 is first
The coil 52 shown by the dotted line in the figure is formed by 5282 unit coils.

The coil end of this coil 52 that protrudes outside the iron core 51 is located on the outside.

Next, the coil 53 represented by the two-dot chain line is the unit coil 53a2.
The coil ends are arranged in the middle.

Finally, the coil 54 is formed of four unit coils 54a and is housed inside.

The outer coil 52 has slots 9-4B, 10-4T and 1.
2-21, 11-22, 24-33, 23-34, and 36-45, 35-46 (not shown), and are arranged in the same number as the number of poles.

Similarly, the intermediate coil 53 also has slots 8 to 17, 7 to 18, 20 to 29, 19 to 30, and 32, as shown by the two-dot chain line.
~ 41.31 not shown ~ 42 and 5 not shown ~ 44.6 not shown ~ 43 not shown, and four windings are arranged.

This is an all-pole winding similar to the arrangement shown in FIG. 1 described above, and has the features of short coil pitch, short coil end length, and short coil average circumference.

Next, the inner coil 54 has slots 4-13, 3-14,
2-15, 1-16, 28-37.27-not shown
They are arranged at 38.26 (not shown) to 39.25 (not shown) to 40 (not shown), and the number of windings is two, which is 1/2 of the number of poles, and each unit coil 54a is formed with four pieces.

This is the same half-polar winding as the arrangement shown in Figure 2 above, and the coil pitch is long, but the coil ends do not overlap.

Between slots 17 and 240, between slots 48 and 4 (not shown)
Since the coil ends between 1 and 1 are in two stages, the coil ends can be easily housed.

Furthermore, the present invention applies the all-pole winding, which originally has a short fill end and a short coil section and has a large number of unit coils, to the outer coil 52 and the middle coil 53, which have a large amount of deformation. Since the pitch is large and there are many unit coils, the coil end is long and the coil circumference tends to be long. Since this is adopted for the coil 54, the outer coil 52, the middle coil 53, and the inner coil 54 can all have approximately the same coil circumference, and the protrusion length in the axial direction is also reduced at the coil end. It became easy to form Y to be the same.

In addition, since the inner coil 54, which is a half-polar winding, is housed after the outer coil 52 and intermediate coil 53, which are all-polar windings, are housed, the coil is placed in the same way as the half-polar winding shown in FIG. Slots 17-24 and 48- at the coil end
Between 410 (not shown), there is a two-tiered portion where the inner coil 54 to be stored later does not overlap, so the inner coil 54 can be easily stored and the coil end portion can be easily shaped.

The arrangement of the windings housed in the slots of the iron core 51 of the present invention is the same as that of the conventional one, and the winding coefficient of the all-pole winding and the winding coefficient of the half-polar winding are the same. The number of times is the same, and the number of effective conductors for each phase is also the same for each phase.

Also, the coil circumferences are the outer force coil 52 and the middle coil 53.
Since both the coil 54 and the inner coil 54 can be made to have the same g, it is possible to obtain a coil with little variation in winding resistance and excellent characteristics.

Furthermore, the present invention is not limited to the above-mentioned embodiment, and the present invention is not limited to the above-mentioned embodiment, and the concentric armature winding of a two-phase AC rotating electric machine and a single-phase AC rotating electric machine having a main winding and an auxiliary winding, without changing the gist thereof. Of course, it can also be applied to the following.

As described above, according to the present invention, the disadvantages of the conventional winding method have been eliminated and the advantages have been adopted, so the coil circumference is short, the copper wire length is not small, the coil end can be shortened, and the winding can be easily stored. This has the effect of providing a good concentric armature winding.

[Brief explanation of the drawing]

Figure 1 is a winding diagram of a conventional all-pole type, Figure 2 is a winding diagram of a conventional half-pole type, and Figure 3 is a cross-section of the main part of the coil end taken along line ■-M in Figure 1. Figure 4 is a sectional view of the main part of the coil end taken along line ■-W in Figure 2, Figure 5 is a winding diagram of an embodiment of the present invention, and Figure 6 is a group of ■ in Figure 5. It is a sectional view of the main part of the coil end taken along the line. 1 to 48...Slot number, 51...Iron core. 52...Outer coil, 53...Middle coil, 5
4...Inner coil, 52a, 53a, 54a...
unit coil.

Claims (1)

[Scope of utility model registration request] In a concentric armature winding in which multiple coils are wound around an iron core and the coil ends protrude outside the core, - the total number of coils wound per phase is the same as the number of poles. In addition to placing the pole winding on the outside, the number of coils per phase is 1/2 of the number of poles, and the number of unit coils is twice that of the full pole winding. An armature winding characterized by being placed inside.