JP2003134711A - Rotating electric machine and connection method for phase coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To more easily align coils in parallel that constitute a rotating electric machine. SOLUTION: When a coil equivalent to one phase is formed by arranging four layers of conductor sets formed by annularly aligning four conductor segments, row-change connections corresponding to the number of parallel rows designed per one conductor are performed among four connecting parts 50. The row-change connection is performed by connecting ends of the conductor segments of the conductor sets adjacent to each other in the diameter direction, thereby forming series coils of which the number corresponds to the number of row-change connections, and also forming parallel coils by parallel-connecting the series coils.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating electrical machine and a method for connecting phase coils, and an even number of conductor sets in which a plurality of segmented substantially U-shaped electric conductors are annularly aligned are radially arranged. The present invention relates to a rotating electric machine including a plurality of phase coils arranged in layers and joining the arranged electric conductors, and a method for connecting the phase coils.

[0002]

2. Description of the Related Art Conventionally, as a rotary electric machine of this type, a plurality of segmented, substantially U-shaped electric conductors (conductor segments) are arranged in each slot of the stator and each conductor segment arranged in each slot. There is proposed a structure in which a coil for one phase is formed by being bonded to each other.

[0003]

The parallelization of such coils for one phase leads to a reduction in the width of the electric conductor when the electric conductor is viewed from the direction of the magnetic flux and a reduction in eddy current loss. On the other hand, since the conductor segment is generally strong and difficult to process, it is preferable that the coils be easily parallelized according to the specifications of the rotating electric machine.

An object of the rotating electric machine of the present invention is to solve these problems and reduce the eddy current loss by parallelizing the coils. Another object of the rotating electrical machine of the present invention is to make parallelization of coils easier.

One of the objects of the method for connecting phase coils of a rotary electric machine of the present invention is to reduce the eddy current loss by parallelizing the coils. Further, the purpose of the method for connecting the phase coils of the rotary electric machine of the present invention is to make parallelization of the coils easier.

[0006]

MEANS FOR SOLVING THE PROBLEMS AND ACTIONS AND EFFECTS THEREOF The rotary electric machine and the phase coil connecting method of the present invention employ the following means in order to achieve at least a part of the above objects.

In the rotating electric machine of the present invention, an even number of conductor sets, each of which is formed by annularly aligning a plurality of segmented substantially U-shaped electric conductors, are arranged so as to be layered in the radial direction, and the arrangement is arranged. A plurality of phase coils formed by joining the respective electric conductors to each other, wherein the phase coil joins the respective electric conductors so as to form a plurality of series coils and The point is to connect them in parallel.

In the rotating electric machine of the present invention, the electric conductors are joined so as to form a plurality of series coils, and the plurality of series coils obtained by the joining are connected in parallel to form a coil for one phase. To be done. That is, a desired parallel coil can be formed in accordance with the joining of a plurality of electric conductors, and thereby eddy current loss can be further reduced.

In the rotary electric machine of the present invention, the plurality of series coils may be formed by joining an electric conductor of one conductor set and an electric conductor of another conductor set. In this case, a plurality of series coils can be easily formed by joining the electric conductors between the different conductor sets, and the series coils can be connected in parallel to form a parallel coil. In the rotating electric machine of the present invention in this aspect, the other conductor set may be a conductor set adjacent to the one conductor set. This makes it easier to parallelize the coils made of electric conductors that are difficult to process.

In the phase coil wiring method of the present invention, an even number of conductor sets, each of which is formed by annularly arranging a plurality of segmented U-shaped electric conductors, are arranged so as to be layered in the radial direction. A method for connecting a phase coil, in which each of the arranged electric conductors is joined together, wherein the electric conductors are joined so as to form a plurality of series coils and the plurality of series coils are connected in parallel This is the method of connecting the coils.

In this phase coil wiring method of the present invention, the respective electric conductors are joined so as to form a plurality of series coils, and the plurality of series coils obtained by this joining are connected in parallel to form one phase. The coil forms. That is, a desired parallel coil can be formed in accordance with the joining of a plurality of electric conductors, and thereby eddy current loss can be further reduced.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described with reference to examples. FIG. 1 is an explanatory diagram illustrating a state in which a coil for one phase is attached to a slot 22 of a stator 20 of a rotating electric machine according to an embodiment. As shown in FIG. 1, the coil for one phase has a conductor segment group 30a, 30b, 30c ...
And a conductor segment group 40a, 40b, each of which has a substantially U shape and is annularly aligned.
The conductor set 40 composed of 40c ... Is arranged in the slots 22 of the stator 20 so as to form layers in the radial direction. If the number of layers at this time is an even number, for example, 4
Layers, 6 layers, etc. may be used. A rotary electric machine formed by including a plurality of coils for one phase includes, for example, a rotor having a permanent magnet attached to the outer surface thereof and three coils for one phase which are 120 degrees out of phase with each other. It can be configured as a synchronous generator-motor incorporating a stator.

As shown in FIG. 1, the coil for one phase is formed by bending adjacent conductor segments in the same conductor set to a position where they face each other and joining the ends of the conductor segments at that position. 50 are formed.
For example, the joint portion 50 in this case is, as shown in FIG. 2A, the end portions of the conductor segments 30a and 30b of the conductor set 30 and the conductor segment 40 of the conductor set 40.
It is formed by joining the ends of a and 40b (hereinafter, this joining is referred to as in-row joining). Then, the joint portion 50 when the row is changed to the conductor set adjacent in the radial direction is
It is formed by joining the ends of the conductor segments of the conductor sets that are radially adjacent to each other. For example, the joint portion 50 in this case joins the end portion of the conductor segment 30b of the first conductor set 30 and the end portion of the conductor segment 40a of the second conductor set 40 as shown in FIG.
This junction is referred to as a column rearrangement junction).

Such a coil for one phase forms a series coil. However, if the coil for one phase is a parallel coil, its cross section can be reduced when the conductor segment is viewed from the direction of the magnetic flux, so that eddy current loss is reduced. It can be reduced. Hereinafter, a method of using coils for one phase as parallel coils will be described. In order to make the coils for one phase into parallel coils, it is first necessary to form the number of series coils according to the designed parallel number. The formation of a plurality of series coils can be performed by combining the above-mentioned same-row joining and row-changing joining.

FIG. 3 is a diagram showing an example of joining the conductor segments. In this example, a conductor set composed of four conductor segments is arranged in four layers to form an eight-pole coil.
Therefore, the joining portions 50 are formed at four positions per conductor set at positions 90 degrees out of phase with each other. FIG. 3A shows an example in which the coils for one phase are serial coils. In this case, the four joint portions 50 are formed by one row replacement joint and three same row joints per one conductor set. Figure 3
In (b), an example is shown in which two series coils are formed in order to make the coils for one phase into two parallel coils. In this case, the four joints 50 are formed by two row-replacement joints and two other same-row joints that are 180 degrees out of phase with each other for one conductor set. FIG. 3C shows an example in which four series coils are formed in order to make the coils for one phase into four parallel coils. In this case, the four joints 50 are formed by four row-replacement joints per conductor set. In this way, by adjusting the number of column-changing junctions per one conductor set, it is possible to form the number of series coils according to this number. Therefore, it is possible to form a desired number of parallel coils by connecting these series coils in parallel.

FIG. 4 is a diagram showing another example of joining the conductor segments. In this example, a 12-pole coil in which four conductor sets each having 12 conductor segments are arranged is formed. In this example as well, as shown in FIGS. 4A to 4E, by forming the column-changing junctions by the number of parallel numbers designed for one conductor set of the four joining portions 50, It will be appreciated that as many series coils can be formed as the number of parallels. It should be noted that such a parallel coil usually depends on the number of layers of the conductor set, but is usually 1/2 to 1
You can create as many types as you want. In the example of FIG. 4 described above, since the coil has 12 poles, 5 ((12/2))
-1) Types of parallel coils can be formed.

According to the rotating electric machine of the embodiment described above,
Multiple series coils can be formed without special processing by appropriately changing the pair that joins the conductor segments, that is, by appropriately changing the same-row joining and row-changing joining. Therefore, the series coils are connected in parallel. By doing so, it is possible to easily form a desired number of parallel coils. As a result, it is possible to more easily create an appropriate number of parallel coils according to the specifications of the rotary electric machine. Moreover, since a common component can be used for a plurality of types of rotary electric machines, it is possible to improve the productivity and reduce the cost of the rotary electric machine.

In the rotating electric machine of the embodiment, the conductor segments of the adjacent conductor sets are joined together to perform the column rearrangement joining. However, the conductor segments of the conductor sets which are not adjacent to each other are joined together using a conductor or the like. It does not matter as a thing.

Although the embodiments of the present invention have been described with reference to the embodiments, the present invention is not limited to the embodiments of the present invention, and various embodiments are possible without departing from the gist of the present invention. Of course, it can be implemented in.

[Brief description of drawings]

FIG. 1 is an explanatory diagram illustrating a state in which a coil for one phase is attached to a slot 22 of a stator 20 of a rotary electric machine according to an embodiment.

FIG. 2 is an explanatory diagram illustrating a manner of joining conductor segments.

FIG. 3 is a diagram showing an example of joining conductor segments.

FIG. 4 is a diagram showing another example of joining conductor segments.

[Explanation of symbols]

20 stators, 22 slots, 30, 40 conductor sets, 30a, 30b, 30c ..., 40a, 40b,
40c ... Conductor segment, 50 joints.

Continued front page    (72) Inventor Kazuaki Shingo             1 Toyota Town, Toyota City, Aichi Prefecture Toyota Auto             Car Co., Ltd. F-term (reference) 5H603 AA07 AA09 BB01 BB02 BB09                       BB10 BB12 CA05 CB01 CC04                       CC17 CD06                 5H615 AA01 BB01 BB02 BB07 BB14                       PP01 PP14 QQ03 QQ12 SS04                       SS18

Claims (4)

[Claims] 1. An even number of conductor sets, each of which is formed by annularly aligning a plurality of segmented substantially U-shaped electric conductors, are arranged in layers in a radial direction, and the arranged electric conductors are arranged in layers. A rotary electric machine comprising a plurality of phase coils joined together, wherein the phase coil is formed by joining the electric conductors so as to form a plurality of series coils and connecting the plurality of series coils in parallel. Rotating electric machine. 2. The rotating electric machine according to claim 1, wherein the plurality of series coils are formed by joining an electric conductor of one conductor set and an electric conductor of another conductor set. 3. The rotating electric machine according to claim 2, wherein the other conductor set is a conductor set adjacent to the one conductor set. 4. An even number of conductor sets, each of which is formed by annularly aligning a plurality of segmented substantially U-shaped electric conductors, are arranged in layers in a radial direction, and the arranged electric conductors are arranged. A method for connecting a phase coil, wherein the electric conductors are connected so as to form a plurality of series coils, and the plurality of series coils are connected in parallel. Method.