JPH0438135A - Electric rotating machine - Google Patents

Abstract

PURPOSE:To suppress maximum differential voltage to be generated in one winding and to facilitate automatic insertion of winding into a slot by a method wherein the winding is split into a plurality of winding sections which are then connected electrically in series and arranged while being spaced by a predetermined distance. CONSTITUTION:Maximum differential voltage V to be generated in one winding can be expressed by V=V. But since one winding is split, in this case, into upper and lower windings insulated from each other through a separator 12 and an insulating paper 13 and they do not cross each other, maximum differential voltages V0 and V1 in the lower and upper windings may be considered individually. Since the upper and lower windings have number of turns equal to half that of each phase winding, V0= V= V/2 is satisfied and the maximum differential voltage to be generated in one winding can be halved as compared with conventional case. Furthermore, the process for inserting each winding into a slot 2 comprises only six steps and thereby it can be automated easily.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a highly reliable rotating electric machine in which nine windings can be easily installed.

[Prior Art] Figures 5 to 7 show an example of a conventional rotating electrical machine.
Number of slots = 24. Phase number -3. Number of poles = 4 connected parallel wires - 4
, a diagram showing an armature winding in an induction motor having pitch=5.

FIG. 5 is a partial cross-sectional view of the slot and the U-phase winding in a cross section perpendicular to the rotation axis of the induction motor.

In the figure, (1) is the armature core, and (201) is one of the 24 slots provided in the armature core (1).
slot (3) is the U-phase winding, (3a) is the outside U-phase winding of the U-phase winding (3) protruding from the slot (201), and (8) is the U-phase winding ( 3) and the armature core (1), (9) is a wedge that prevents the U-phase winding (3) from protruding from the opening of the slot (201), and (36) is a U-phase winding outside the slot (
This is the intersection where some of the covered conductors forming part 3a) intersect. Although FIG. 5 shows the U-phase winding (3), the same applies to the other V-phase windings and W-phase windings.

Figure 6 shows the armature core (1), the U-phase winding (3), the V-phase winding (4), and the W-phase winding (5) in the white 24@ slots.
) is a developed view of the armature winding showing the state in which each of the above is arranged.
The slot of the 24th throttle V is shown.

In addition, as shown in FIG. 6, each winding is a U-phase winding (
3) is placed in the lower layer of slots (201) to (224), ■ phase winding (4) is placed in the middle layer of slots (201,) to (224), and W phase winding (5) is placed in the middle layer of slots (201,) to (224). 224)
It is placed on the upper layer of.

Figure 7 is an expanded connection diagram of the armature winding, and in Figure 9 (
7) is a parallel connection part in which all four pole windings of each phase are connected in parallel, (U), (V), (1), (X
).

(Y) and (Z) are terminals for connecting each winding to a three-phase AC power source.

Figure 8 is a connection diagram showing the connection between terminals when an induction motor is connected to a three-phase AC power supply using a delta connection.
) indicates a three-phase AC power supply.

FIGS. 9 and 10 are diagrams showing an armature winding of a rotating electric machine disclosed in Japanese Patent Application Laid-Open No. 63-161831 as another example of a conventional armature winding of a rotating electric machine. 9 is a diagram corresponding to FIG. 5, and FIG. 10 is a diagram corresponding to FIG. 6. In FIGS. 9 and 10, (300a),
300b) and (300c) are each divided into 7 U
One of the phase windings (400a) is one of the divided phase windings, (300), (400),
(500) is a pair of U phase winding, ■ phase winding, W
This shows that it is a phase winding.

Next, details of the conventional device will be explained. An induction motor with an armature winding connected as shown in Fig. 7 is
When operating with wire connection, as shown in Figure 8, connect the terminal (U)
and the terminal (Z) to the terminal (R) of the three-phase AC power supply (40),
Connect the terminals (V) and (X) to the terminal (S) of the three-phase AC power supply (40), and connect the terminals (W) and terminal (Z) to the three-phase AC power supply (40).
0) terminal (T). At this time.

U phase winding (3), V phase winding (4), W phase winding (5)
Currents having a phase difference of 120° flow through each winding, generating a nine-rotation magnetic field, and this rotating magnetic field imparts a rotational force to a movable element (not shown).

Now, generally the maximum voltage difference (ΔV) within one winding
is given by the following equation.

Here, ■ = power supply voltage, P - number of poles, PH = number of phases M - number of parallel connections, N = number of armature slots, N = number of windings in one slot.

In the conventional example shown in FIGS. 5 to 7, P=4. P
H=3. M=4. N,=24. Because N=1.

X24X1, and a maximum potential difference of the same value as the power supply voltage occurs within one winding.

Further, as another conventional example, in the case of the armature shown in FIGS. 9 and 10.

Therefore, the maximum potential difference that can occur within one winding becomes 1/2 compared to the conventional example shown in FIGS. 5 to 7.

Next, the process of inserting each winding into the slot (2) of the armature will be described.

1201 to 2 for the armature shown in Figures 5 to 7
06.207~212.213~218.219~22
Insert the U-phase winding (3) into slot 4.

2203-208.209-214.215-220.
Insert the phase winding (4) into slots 221-202.

3205-210.211-216.217-222.
Insert the W-phase winding (5) into slots 223-204.

All the windings are inserted through the following three steps.

On the other hand, in the case of the conventional armature shown in FIGS. 9 and 10.

1.2 Insert the U-phase lower winding into the old slot.

Insert the phase lower opening winding into the 2202 slot.

Insert the V-phase lower winding into the 3203 slot.

4. Insert the W-phase lower winding into the 204 slot.

Insert the W-phase lower winding into the 5205 front.

Insert the U-phase lower winding into the 6206 slot, and insert the U-phase upper winding into the 2 old slot.

7. Insert the U-phase lower winding into the 207 slot, and insert the U-phase upper winding into the 202 slot.

As shown in the figure, the windings are sequentially inserted into each slot, making it difficult to automate the insertion of nine windings.

The armature windings of rotating electrical machines have conventionally been wound in two layers as shown in Figures 9 and 10.

In recent years, for the purpose of improving productivity, single-layer winding has been used, which is advantageous in terms of ease of automatic installation of windings into slots, number of connections between coils, and the like.

In a winding in which multiple turns of winding are inserted into a narrow slot, there is a high possibility that a large potential difference will occur between adjacent conductors within the same winding, compared to the case in a general transformer.

As a countermeasure to this problem, it is conceivable to use a winding wire provided with a coating film having good insulation properties, but this method makes the winding wire expensive.

[Problem to be solved by the invention]

Since conventional rotating electric machines are configured as described above, the configuration shown in FIGS. 5 to 7 has the problem of increasing the maximum voltage difference that can occur within one winding. 9
According to the configuration shown in FIGS. 1 and 10, there was a problem in that it was difficult to automate the insertion of one winding.

This invention was made in order to solve the above-mentioned problems, and provides a rotating electric machine in which the maximum voltage difference that can occur within one winding is small, and the insertion of nine windings into slots is easy to automate. The purpose is to obtain.

[Means to solve the problem]

A rotating electrical machine according to the present invention is a rotating electrical machine in which a winding is installed across a predetermined pair of a plurality of slots provided in an iron core, the winding is divided into a plurality of parts, and each of the divided windings is electrically connected to each other. They are connected in series and are spaced apart from each other by a predetermined distance.

[Effect]

In the rotating electric machine of the present invention, a winding installed across a predetermined pair of a plurality of slots provided in an iron core is divided into a plurality of parts, and each of the nine divided windings is electrically connected in series and mutually arranged in a predetermined manner. By arranging them in the same slot at intervals, it becomes easier to attach one winding to the slot, and the voltage applied between adjacent conductors constituting one winding becomes lower.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings. 1st
3 to 3 show an example of a rotating electrical machine according to the present invention, in which the number of slots is -4 and the number of phases is 3. Number of poles = 4, parallel wire connection = 4.
FIG. 1 is a diagram showing an armature winding in an induction motor with a pitch of 5, and FIG. FIG. 3 is a partial cross-sectional view of a phase winding. Of the U-phase windings that are divided and installed in the figure, (3
(31)
is the U-phase upper winding having the number of turns (total number of turns of the U-phase winding - number of turns of the U-phase lower winding), and the U-group lower winding (30) and the U-phase lower winding
They are connected in series with the phase inlet winding (31).

(30a) is the U-phase lower winding outside the slot placed outside the slot (2) of the U-group lower winding (30), (ala) is the U-phase lower winding
The out-of-slot U-phase upper winding placed outside the slot (2) of the phase upper winding (31), (30b) is the U-group lower winding (3
0), (12) is the intersection of U group lower winding (30) and U
An insulator 1 for insulating the phase upper winding (31) from each other in the slot (2), for example, a separator, (13) is the U-phase lower winding (30a) outside the slot and the U-phase upper L1 winding outside the slot. (
The insulator 1, for example, insulating paper, insulates the windings 31a') from each other and from the windings of other phases.

Although FIG. 1 shows the U-phase winding (3), the same applies to the ■-phase winding (4) and the W-phase winding (5).

Figure 2 shows the armature core (1) or 24 slots.
(201) to (224) are developed views of the armature windings showing the U-phase to W-phase upper windings and lower 1 windings, respectively. Mouth winding, (
31) is the U-phase upper opening winding, (40) is the ■assembly bottom [1 winding (
41) is ■phase upper opening winding, (50) is W phase lowering] winding,
(51) is a W-phase upper winding. As shown in Figure 2, the U-phase lower 11 winding (30) and the U-phase E-th winding (31)
or first inserted into slots (201) to (224) 1
Next, ■ phase lower III winding (40) and ■ phase upper opening winding (41)
The lower end winding (50) of the W set and the upper E1 winding (51) of the W set are inserted finally into the slots (201) to (224).

FIG. 3 is a developed connection diagram of the armature winding, which is the same as the conventional example shown in FIG. 7 except that the windings for each phase are divided into a lower winding and an upper winding.

Next, in the armature winding as an embodiment of the present invention shown in FIGS. 1 to 3, the maximum voltage difference ΔV occurring within one winding is shown in FIGS. 5 to 7. The maximum voltage difference ΔV is determined by the same formula (1) as used in the conventional example, and Δ■=v.

However, in this case, one winding is divided into two parts, a lower winding and an upper winding, which are insulated from each other by a separator (12) and an insulating paper (13), and do not cross each other. The maximum voltage difference in the lower winding (ΔVo) and the maximum voltage difference in the upper winding (ΔV+) may be considered separately. The number of turns of the lower winding and the number of turns of the upper winding are 1/2 (or approximately 1/2) of the number of turns of each phase winding.

Δ■ Δ■o=Δ■1= The maximum voltage difference that can occur within one winding can be reduced to 1/2 of that in the conventional examples shown in FIGS. 5 to 7. By reducing the maximum voltage difference within one winding, the insulation life of one winding becomes longer and the reliability of the winding improves.

Further, the steps of inserting each winding into the slot (2) are performed in steps 1201 to 206. 207-212. 213-21
8. U-phase lower winding (3a
) is inserted.

2201~206.207~212.213~218
Insert the U-phase upper winding (3b) into slots 219-224.

3.203~208.209~214.215~220
．． Insert the V-phase lower winding (4a) into slots 221-202.

4203-208.209-214.215-220.
Insert the phase upper winding (4b) into the slots 221-202.

5205-210.211-216.217-222.
Insert the W-phase lower winding (5a) into slots 223-204.

6.205~210.211~216.217~222
．． Insert the W-phase upper winding (5b) into slots 223-204.

It can be easily automated as it can be done in just 6 steps.

FIG. 4 shows 24 slots (201) of an armature core (1) in an induction motor as another embodiment of the present invention.
~ (224) are the U-phase lower winding (30), the U-phase upper winding (31), the V-phase lower winding (40), and the ■ phase upper winding (4).
1) W-phase lower winding (50) and W-phase upper winding (51)
) is an exploded connection diagram of the armature showing the arrangement of the armatures. In Fig. 2, the U-phase lower winding (30) and the U-phase
The phase upper winding (31) is in the lower layer, the ■ phase lower winding (40) and the V phase upper winding (41) are in the middle layer, and the W phase lower winding (50).
and W-phase upper winding (51) are placed together in the upper layer, or as shown in Fig. 4, the U-phase lower winding (30) and V-phase lower winding (30) are arranged in order from the bottom layer. 40), W-phase lower winding (50), U-phase upper winding (31), V-phase upper winding (41), and W-set upper L1 winding (51).

An embodiment of the present invention shown in FIGS. 1 to 3, and
In another embodiment of the invention shown in FIG. 4, the number of slots=24. Number of phases = 3. Number of poles - 4, connection parallel lines - 4
, pitch = 5, but this invention is not limited to this, but is applicable to any rotating electric machine that has a winding installed in the slot of the iron core, not only an induction motor that has an armature winding. Good too.

Also, did you explain the case where the ratio of the number of turns of the lower winding to the number of turns of the upper winding is 11 (or approximately 1.1)?
．． It may be set to any ratio such as 1 or 3.

Furthermore, although one winding is divided into two, the lower winding and the upper winding, it may be divided into 12 or more.

〔Effect of the invention〕

As described above, according to the present invention, the winding to be installed across a predetermined pair of a plurality of slots provided in the iron core of a nine-turn machine is divided into a plurality of parts and arranged at predetermined intervals. Because of this structure, the first winding can be easily installed in the slot and automatically installed, and high voltage is not applied between the conductive wires that are close to each other and make up the first winding, which has the effect of improving reliability.

[Brief explanation of drawings]

1 to 3 are diagrams showing armature windings of an induction motor as a rotating electric machine according to an embodiment of the present invention. FIG. 1 is a partial sectional view of a U-phase winding, and FIG. Developed diagram of armature winding,
FIG. 3 is a developed connection diagram of the armature winding. FIG. 4 is a developed view of an armature winding according to another embodiment of the invention. Figures 5 to 7 are diagrams showing the armature winding of an induction motor as a conventional rotating electrical machine, with Figure 5 being a partial sectional view of the U-phase winding, and Figure 6 being a developed view of the armature winding. . FIG. 7 is a developed connection diagram of the armature winding. FIG. 8 is a connection diagram in which an induction motor as a rotating electric machine is connected to a three-phase AC power source through a Δ connection. Figure 9 and Figures 1-0 are diagrams showing the armature winding of an induction motor as another conventional rotating electric machine. Figure 9 is a partial sectional view of the U-phase winding, and Figure 10 is the armature winding. It is a development diagram of lines. In the figure, (1) is the armature core, (201) to (224)
is the slot i (12), (13) is the insulator, (3,
0), (31), (40). (41), (50), and (51) are armature windings. In Figure 1, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] In a rotating electric machine in which a winding is installed across a predetermined pair of a plurality of slots provided in an iron core, the winding is divided into a plurality of parts, and each divided winding is electrically connected in series with each other. A rotating electrical machine characterized by being arranged at predetermined intervals.