JPH0260438A - Lap winding method - Google Patents

Abstract

PURPOSE:To reduce dimensions of coil end by containing two continuous coils in slots. CONSTITUTION:First coil of continuous U-phase coil is contained in slots 1 and 4 to provide coil U1. First coil of continuous W-phase coil is contained in slots 3 and 6 to provide coil W1. Then second coil of the continuous U-phase coil is inverted and contained in slots 4 and 7 to provide coil U2. First coil of continuous V-phase coil is contained in slots 5, 8 to provide coil V2 while the second coil of continuous W-phase coil is inverted and contained in slots 6, 7 to provide coil W2. Other continuous coils are contained similarly in slots to form U3, V3, W3, U4, V4, W4 coils. After the coil W4 is contained, the second coil which makes pair with V4 coils is inverted and contained in slots 2, 5 to provide V1 coil.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a method of winding a lap winding in which the connection configuration of each coil and the order of storage in a thrower I are improved.

(Prior Art) For example, in a 4-pole 12-slot Sanwayomi conductive motor, the armature winding of the conventional lap winding method is wound as follows.

First, the 12 J1 coils are wound by a winding machine. Then, these are sequentially stored in each slot of the stator core using the so-called fried coil method.

This raised coil method first stores only one coil side of each unit coil in the lower part of the slot, and the other coil side is not stored in the slot but is temporarily raised to the inner peripheral surface of the stator core. Then, the coil sides of other unit coils are stored in the lower part of the slot and then stacked on top of the other unit coils, and the final storage state of each unit coil is as shown in FIG. 5. After all the unit coils are housed in this manner, each unit coil is connected at the coil end portion to complete the armature winding.

(Problem to be solved by the invention) However, in the above-mentioned fried coil method, both coil sides of one unit coil cannot be accommodated in the slot at the same time, so the coil accommodation work is extremely troublesome and productivity is poor. There's a problem. Furthermore, since the unit coil must be connected between each pole, there is a disadvantage that the number of connection points increases, making the connection part bulky, and resulting in an increase in the coil end dimensions.

On the other hand, a continuous storage method has also been considered in which a continuous coil is formed by continuously winding two medium-sized coils, and the continuous coil is sequentially stored in each slot.

This method has the advantage that the coil end dimensions can be reduced because the number of pole-to-electrode connections is halved, but since the two coils that make up the continuous coil must be wound in opposite directions, the coil winding This results in the problem that the process becomes extremely complicated.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a lap winding method that can simplify the coil storage work and improve productivity, and also reduce the coil I and dimensions without complicating the coil winding process. Provides a method for installing.

[Structure of the Invention] (Means for Solving the Problems) The method for winding a lap winding wire according to the present invention comprises a plurality of continuous coils each consisting of a first coil and a second coil that are continuously wound in the same direction. The present invention is characterized in that the first coil is in the forward direction and the second coil is in the reverse direction, and each successive coil is housed in the slot in the following order.

(1) Both coil sides of the first coil of one continuous coil are housed in respective predetermined slots to form the first pole of the U phase. (2) Both coils of the first coil of one other continuous coil The remaining coils of the continuous coils stored in (1) are housed in slots that are electrically shifted by 120° from the first pole of the U phase to form the first pole of the W phase. 2
The coil is reversed, and both sides of the coil are housed in slots that are electrically shifted by 60 degrees with respect to the first pole of the W phase.
(4) Among the other continuous coils, both coil sides of the first coil are respectively housed in slots shifted by 60 degrees in electrical angle from the second pole of the U phase. ■As the second pole of the phase (5) The remaining second pole of the continuous coil stored in (2)
The coil is reversed, and both sides of the coil are housed in slots that are shifted by 60 degrees in electrical angle from the second pole of the above-mentioned phase (W).
(6) When the number of poles is 2 or more, use another continuous coil as the second pole of the phase.
The first coil is housed in the forward direction and the second coil is housed in the opposite direction at positions shifted by 60 degrees in electrical angle to form the 3rd, 4th...poles of each phase of U, V, and W. (7) W phase After forming the final pole of , reverse the second coil that forms a pair with the first coil that formed the final pole of the Storing it and making it the [th] pole of phase (effect) Since the continuous coil with two continuous coils is stored in the slot, the number of connections between the coils is reduced, and the coil end dimensions can be reduced accordingly. I'll come. Moreover, even though it is a continuous coil, the second coil constituting one of the coils is housed in the slot inverted, so when manufacturing a continuous coil, both the first and second coils are wound in the same direction. The winding process is significantly simpler than with conventional continuous coils.

In addition, since each coil is stored in the slot in the order of (1) to (7) as if it were a double series, both coil sides of one coil can be stored in the slot at the same time. There is no inconvenience like the coil method, and productivity can be greatly improved.

(Example) Hereinafter, a first example in which the present invention is applied to a three-phase induction motor with four poles and twelve slots will be described with reference to FIGS. 1 to 3.

A developed view of the winding in the completed form is shown in FIG. 2, and this armature winding is manufactured as follows.

First, a continuous coil consisting of a first coil and a second coil having the same winding direction is wound using a winding machine. In this embodiment, there are three phases, four poles, and two slots, so six continuous coils in total are required, two for each phase. In this case, for example, it is preferable to color-code the insulating tubes that cover the crossover wires. Thereafter, each continuous coil is sequentially accommodated in the slot as follows.

(1) First, take the U-phase continuous coil and store it so that both coil sides of the first coil are located at the bottom of the slot numbered 4 and 4 respectively. This will be the coil for the first pole (U) of the U phase. At this time, the remaining second coil is the stator V,
It's best to keep it out of your mind.

(2) Take a continuous coil of W phase sum and store both coil sides of the first coil in respective slots. The storage positions are slots numbered 3 and 6, which are offset by 120 degrees in electrical angle from the first pole (Ul) of the U phase. This becomes the coil for the first pole (Wl) of the W phase. The remaining second coil is (1)
Similarly, place it outside the stator core.

(3) Next, the remaining second coil of the U-phase continuous coils stored in (1) is rotated, for example, by 180° with one coil side as a support. As a result, the second coil is reversed, and if the winding direction of the first coil is the positive direction, the second coil is reversed.
The winding direction of the coil is reversed (in FIG. 3, the form before reversal is shown by a broken line, and the form after reversal is shown by a solid line. In the figure, arrows indicate the directions of currents flowing simultaneously). After that, if both coil sides of the second coil are accommodated in the throwers numbered 4 and 7, which are located 60 degrees electrically apart from the first pole (Wl) of the W phase, this 2nd pole of U phase (U2)
It becomes a coil for use.

(4) ■Take one continuous coil of Aiwa and store both sides of the first coil in the positive direction.

The storage position is 60 electrical degrees with respect to the second pole (U2) of the U phase.
'The numbers 5 and 8 are in different positions. This becomes the coil for the second pole (V2) of the V phase.

(5) Next, the remaining second coil of the W-phase continuous coil stored in (2) is reversed in the same way as in (3), and both sides of the coil are used as the V-phase second pole (■2). 6 in electrical angle
Store them in the slots numbered 6 and 7, which are shifted by 0'. This becomes the coil for the second pole (W2) of the W phase.

(6) Furthermore, the first coil of the other continuous coil is housed in the slot in the forward direction to form the coil for the third pole (U3) of the U phase, and then the coil for the third pole (U3) of the V phase housed in (4). The remaining second coil of the continuous coil is placed in the slot in the opposite direction as in (3) to form a coil for the third pole (V3) of the V phase, and thereafter each coil is placed in the slot in the same manner. Store it W3. U4V4. Coils for W4 are sequentially formed. In this case, the positions of the coils of each pole are shifted by 60' in electrical angle, and the first coil is housed in the forward direction and the second coil is housed in the opposite direction, as described above.

(7) After storing the W4 coil that forms the final pole of the W phase, reverse the second coil that is paired with the ■4 coil (first coil) that forms the final pole of the ■ phase. In the direction of 2, store it in the slots numbered 2 and 5, which are located 20 degrees electrical angle away from the final pole of the W phase. This will be the coil for the first pole of ■kan. This means that a total of 12 coils forming the first to fourth poles of each phase of U, V, and W are housed.

Among these 12 coils, Ul-U2. U3U4. V
2-V3. Vl-V4. Wl-W2゜W 3-W 4
Six sets of these constitute a continuous coil.

Of the 12 coils constituting these 6 continuous coils, Ul, U3 . V2. Vl, Wl, W3 6
U is constructed by accommodating the first coil in the forward direction.
2. U4. V3. V4. The six coils W2 and W4 are constructed by accommodating second coils in opposite directions. Therefore, even if the first and second coils of each continuous coil are wound in the same direction in advance, the direction of the seven currents in the slot will be appropriate (see FIG. 3).

In this way, according to this embodiment, both coil sides of each coil can be stored in the slots at the same time, and unlike the fried coil method, one coil side can be placed on the inner periphery of the iron core while the other coil sides can be stored in the slot. Since there is no hassle of having to insert the coil side, the coil storage process becomes easier and productivity can be greatly improved. In addition, since one continuous coil is made up of the first and second coils, the number of connections between poles is halved compared to the conventional method, which required connections between all 12 coils. Therefore, it is possible to reduce the size and improve the reliability of the four-coil-end method. Moreover, while configuring a continuous coil in this way, both the first and second coils only need to be wound in the same direction, so complication of the coil winding process can be avoided, and the coil winding process can be improved. It is also possible to prevent a decrease in productivity.

It should be noted that the present invention is not limited to the embodiment shown in the drawings, and can of course be applied to, for example, rotor windings as well as stators. Limited to 12 slots, 4 poles 24 slots, 4 poles 36 slots, 4 poles 48 slots, 6 poles 18 slots, 6 poles 36 slots, 6 poles 54 slots
The same can be applied to the case of slots, 8 poles and 24 slots. An example of 4 poles and 24 slots is shown in Figure 4 as a second embodiment, but this is wound according to the same principle as the first embodiment shown in Figure 1, with each phase having 2 poles. The second embodiment is the same as the first embodiment except that it is composed of two coils. In the figure, the U-phase coil is shown by a solid line, the ■-phase coil is shown by a broken line, and the W+th coil is shown by a dashed-dotted line.

[Effects of the Invention] As described above, according to the present invention, both coil sides of one coil can be housed in the slot at the same time, so the coil housing work becomes easy and productivity can be improved.

Moreover, since it accommodates a continuous coil made up of two coils wound in the same direction, the coil winding C
This has the excellent effect of reducing the number of connections between poles and reducing the size of the coil end without complicating the process.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, FIG. 1 is a coil layout diagram showing the stored state of the armature windings, FIG. 2 is a developed view of the windings, and FIG. FIG. 4 is a front view of a continuous coil showing the form before and after reversal of the coil, FIG. 4 is a view corresponding to FIG. 1 showing a second embodiment of the present invention, and FIG. 5 is a view corresponding to FIG. 1 showing a conventional example. In the drawings, 1 to 24 are slot numbers, U1 to U4 are U-phase coils, 1 to 4 are V-phase coils, and W1 to W4 are W-phase coils. Applicant Toshiba Corporation] 4

Claims (1)

[Claims] 1. A method of forming a lap winding by sequentially storing the coils of each phase and each pole in each slot of a rotating machine core, the method comprising: A plurality of continuous coils consisting of a first coil and a second coil are formed, and each continuous coil is stored in a slot in the following order, with the first coil in the forward direction and the second coil in the reverse direction. Features a winding method for lap winding. (1) Both coil sides of the first coil of one continuous coil are housed in respective predetermined slots to form the first pole of the U phase. (2) Both coils of the first coil of one other continuous coil The remaining coils of the continuous coils stored in (1) are housed in slots that are electrically shifted by 120° from the first pole of the U phase to form the first pole of the W phase. 2
The coil is reversed, and both sides of the coil are housed in slots that are electrically shifted by 60 degrees with respect to the first pole of the W phase.
(4) Among the other continuous coils, both coil sides of the first coil are housed in slots that are shifted by 60 degrees in electrical angle from the second pole of the U phase. (5) As the second pole of the phase, the remaining second pole of the continuous coil stored in (2)
The coil is reversed, and both sides of the coil are housed in slots that are electrically shifted by 60 degrees with respect to the second pole of the V phase.
(6) When the number of poles is 2 or more, use another continuous coil as the second pole of the phase.
The first coil is housed in the forward direction and the second coil is housed in the opposite direction at positions shifted by 60 degrees in electrical angle to form the 3rd, 4th...poles of each phase of U, V, and W. (7) W phase After forming the final pole of , the second coil that forms a pair with the first coil that formed the final pole of V phase is reversed, and both sides of the coil are placed in slots that are 120 degrees electrically shifted from the final pole of W phase. Store it and use it as the first pole of V phase.