JP3480317B2 - Electric rotating machine and rotating machine coil - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric rotating machine and a rotating machine coil, and more particularly to teeth of a rotating machine.
The improvement of the space factor of the coil wire in the interval.

[0002]

2. Description of the Related Art Conventionally, electric rotating machines (motors and generators) having various configurations are well known. For example, in a motor of a certain type, a rotor is arranged inside a cylindrical stator, and an inner circumference of the stator is provided. A plurality of teeth are projected at equal intervals, and a motor coil is formed by winding a coil wire around the teeth.

To improve the performance of the motor, the number of times the coil wire is wound around the tooth is increased to increase the area occupied by the coil wire in the region between the teeth (increase of space factor).
Is desired. Motor output can be increased by increasing the number of windings,
The energy efficiency of the motor can be improved by reducing the gap between the coil wires, and further, by utilizing these advantages, the design can be liberalized and the motor can be downsized.

For example, Japanese Unexamined Patent Publication No. 7-274422 discloses a motor in which coil wires are wound in layers on each tooth as shown in FIG. By narrowing the width of the coil wire (that is, the coil wire in the upper layer), the gap between the coils is reduced and the space factor is improved.

[0005]

However, in the conventional motors including the above publication, adjacent coils have the same cross-sectional shape, and therefore, it is possible to avoid a wasteful gap between the adjacent coils. Therefore, there is room for improving the space factor of the coil wire by eliminating this useless space.

Although the motor has been described here as an example, the above problem similarly occurs in the generator.

The present invention has been made in view of the above problems, and an object thereof is to provide an electric rotating machine and a rotating machine coil capable of improving the space factor of the coil wire.

[0008]

In order to achieve the above object, the present invention is to laminate a predetermined number of electromagnetic steel plates (20).
Formed stator block (12) and said stator
Wind the coil wire (4) around the teeth of the block (12).
Rotating machine coil (15,1) formed by attaching
6) and having the rotating machine coil (15, 16)
The stator blocks (12a, 12b) are arranged in a ring
The stator block (12a, 12
Formed by welding the contact points of b)
An electrical rotating machine having a stator (10), the rotating machine coils provided adjacent teeth (15, 16) have different cross-sectional shapes from each other, each rotating machine coils
(15, 16) is the next to the rotating machine coils (16, 15) has a cross-sectional shape so as to compensate the remaining area after they have possession of the teeth between the regions, or, gap between coils
It is characterized in that it is arranged so as to fill the different part between .

Further, according to one embodiment of the present invention, a predetermined number of electric
Stator block formed by laminating magnetic steel sheets (20)
Wind the coil wire (4) around the teeth of (12).
A rotating machine coils (15, 16) formed by the rotating machine coils provided adjacent teeth
(15, 16) have different cross-sectional shapes,
Each rotating machine coil (15, 16) is an adjacent rotating machine coil.
(16, 15) has a cross-sectional shape that fills the remaining area after occupying the inter-tooth area , or
Placed to fill different parts of the gap between the coils
It is characterized by being.

In the present invention, preferably, two types of rotating machine coils (15, 16) having different cross-sectional shapes are alternately arranged.

The present invention can be applied to one or both of the stator and the rotor. The electric rotating machine may be used as a motor, a stator, or both. Further, the rotating machine may be of a type in which the rotor is arranged inside the stator, vice versa, or any other type.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention (hereinafter referred to as embodiments) will be described below with reference to the drawings.

FIG. 1 shows the structure of a split stator type concentrated winding motor. FIG. 1 (a) shows the structure of a motor to which the prior art is applied, and FIG. 1 (b) shows the present invention. This is the configuration of the applied motor.

In FIG. 1 (a), a cylindrical stator 1
Has a plurality of stator blocks 2 arranged in a circle (only a part is shown in the figure). Each stator block 2 has teeth (projecting poles) protruding in the center direction.
Have three. A stator coil 5 is formed by winding a rectangular coil wire 4 having a rectangular cross-sectional shape around each tooth 3. As shown, all stator coils 5 have the same cross-sectional shape. A rotor (not shown) is inserted inside the stator 1, and the rotor is rotatably supported by the stator.

Here, in FIG. 1A, the rectangular coil wire 4 is
By adopting, the gap between the individual coil wires becomes smaller than that of the conventional configuration using round coil wires,
The space factor is improving. However, a relatively large gap is formed between two adjacent coils 5,
This gap becomes a useless space and reduces the space factor. Therefore, it is desirable to eliminate this useless space as much as possible. However, as long as adjacent stator coils 5 have the same cross-sectional shape, it is difficult to increase the number of windings of coil wire 4 without causing interference between adjacent coils 5. In other words, in the conventional configuration in which the adjacent coils 5 have the same shape, the number of windings of the coil wire 4 is limited to be low and a relatively large gap is formed between the coils in order to avoid interference between the coils. .

On the other hand, in the stator 10 having the structure shown in FIG. 1B, as a feature of the present invention, the stator coils 15 and 16 provided on the teeth 13 of the adjacent stator blocks 12 have different sectional shapes. ing. The stator coils 15 and 16 have a sectional shape that complements the remaining area after the adjacent coils occupy the inter-teeth area 17. This makes it possible to improve the space factor by adding the winding of the coil wire around the gap between the coils without causing interference between the coils.

More specifically, the stator coils 15 and 1
6, the coil wire 4 is additionally wound around the portions denoted by reference numerals 15a and 16a, respectively, so that the number of windings is increased as compared with the conventional configuration. Here, both coils 15,
In 16, the additional winding of the coil wire is performed in different places. That is, the two additional winding portions 15a and 16
“A” is arranged so as to fill the different gaps between the coils. This increases the number of windings while avoiding interference between the coils. Of course, the increment of the number of windings is the same for the coils 15 and 16, and the number of windings and the cross-sectional area of both coils are maintained equal.

Further, in the structure of FIG. 1B, the stator coils 15 and 16 having two types of cross-sectional shapes are alternately arranged. That is, every other coil having the same cross-sectional shape is arranged. As a result, even if the cross-sectional shape of each coil is different, it is easy to position the center of gravity of the coil at the center of the stator when viewed as a set of all coils.
Therefore, there is an advantage that the rotation balance of the motor can be easily taken. This advantage is particularly effective when the invention is applied to rotors.

Next, a method of manufacturing the motor of this embodiment will be described with reference to FIGS. As shown in FIG. 2A, an electromagnetic steel sheet 20 punched into a predetermined shape by press working or the like is prepared. As shown in FIG. 2B, a predetermined number of electromagnetic steel plates 20 are stacked and joined by welding (Tig welding, laser welding, etc.) at the welding location 20a to form the stator block 12. Note that the number and positions of welding points are not limited to those shown in FIG. 2B, and are arbitrary.

FIG. 3 shows a winding machine for forming a stator coil. The stator block 12 is held by an openable / closable chuck 24 arranged on a table 22 of the winding machine. The table 22 is moved in the direction of arrow E by a feed mechanism (not shown) according to the winding pitch of the flat coil wire 4. Furthermore, the table 22 is
The motor 26 rotates in the direction of arrow F. As a result, the rectangular coil wire 4 is wound around the teeth portion of the stator block 12 to form a stator coil.

An insulating paper 28 is inserted between the stator block 12 and the rectangular coil wire 4 to prevent the surface of the coil wire 4 (such as an enamel film) from being scratched and ensure insulation. To be done.

In the winding machine shown in FIG. 3, the wire rod 4a having a round cross section is shaped into the rectangular coil wire 4 having a rectangular cross section by passing through the deforming rotor 30. Further, the reverse warp roller 32 is used to form the rectangular coil wire 4
The winding habit (the habit when the wire material is wound on the bobbin) is corrected, and the corrected coil wire 4 is wound around the stator block 12 as it is. By such a method, the stator coil can be formed at low cost.

In the above process, by controlling the feed movement amount of the winding machine, the two types of stator coils having different sectional shapes described with reference to FIG. 1 are formed. In this embodiment, as will be described later, the stator is divided into 12 stator blocks. Therefore, a total of 12 stator blocks are prepared, with six stator blocks provided with coils of the same cross-sectional shape. That is, six stator blocks each including the coil 15 of FIG. 1 and six stator blocks each including the coil 16 are prepared.

The twelve stator blocks are annularly arranged as shown in FIG. As shown, stator blocks 12a, 12b with coils 15, 16 respectively
Are arranged alternately. Adjacent stator block 12
An insulating member (interphase insulating material) 34 is inserted between a and 12b. The insulating member 34 is, for example, an insulating paper having a thickness of about 0.5 mm or a resin insulating sheet (polyimide, polyamide, etc.) and secures insulation between the coils.

In the state shown in FIG. 4, the adjacent stator blocks 12 are arranged with a slight gap. These stator blocks 12 are assembled to each other using the combination jig 36 shown in FIG. The block group, which was arranged in a circle with a diameter G before the assembly, is changed to the taper portion 36 of the jig 36.
When passing through a, it is compressed in the radial direction, and finally the diameter of the block group becomes H, and in this state, the adjacent stator blocks 12 are in contact with each other without a gap. It should be noted that in FIG. 4, coil end portions above and below the stator block 12, that is, coils of portions protruding above and below the stator block are visible.

FIG. 6 is an enlarged view of the stator block immediately before assembly. It is preferable that the housing portion (outer peripheral cylindrical portion) of the stator block 12 is provided with an engaging convex portion 38 and an engaging concave portion 40 on a joint surface with an adjacent stator block. At the time of assembling, the engaging convex portion 38 fits into the engaging concave portion 40, so that the stator block is surely aligned and the positional deviation after the assembly is prevented.
The 12 stator blocks after being assembled are joined to each other by welding or the like, thereby completing the stator.

Further, as shown in FIG.
A separately prepared rotor 50 is inserted into the rotor, and the rotor 50 is rotatably supported by the stator 10 to complete the motor of this embodiment.

In this embodiment, the specifications of the motor are:
It is a three-phase AC type, the outer diameter of the stator is 210 mm, the height is about 90 mm, and the number of stator blocks, that is, the number of teeth is 12. Further, the cross-sectional shape of the rectangular coil wire 4 is, for example, a substantially rectangular shape of about 2 mm × about 3 mm, and the diameter of the round wire before forming the rectangular coil wire 4 is about 2.7.
mm. Of course, the present invention is not limited to the motor having such specifications.

Further, in the present embodiment, the present invention is applied to the motor coil using the rectangular coil wire, but the present invention can be similarly applied to the motor coil using the conventional round coil wire. .

Further, the present invention is not limited to the above-mentioned embodiment, but can be applied to an electric rotating machine having any other structure. The rotating machine may be a motor, a generator, or a motor generator used for both. Further, the present invention may be applied to either or both of the stator and the rotor. The rotating machine may be of a type in which the rotor is inserted into the stator or vice versa.

[0031]

As described above, according to the present invention, since each coil has a shape that fills the gap between the teeth formed by the adjacent coils, the space factor of the coil wire is reduced. Therefore, the motor performance can be improved. Further, if the motor has the same number of turns, the motor can be made compact by applying the present invention.

Further, according to the present invention, it is possible to obtain an advantage that it is easy to balance the rotation of the electric rotating machine by alternately arranging the two types of coils having different sectional shapes.

[Brief description of drawings]

FIG. 1 is a diagram showing a motor of an embodiment of the present invention in comparison with a configuration of a motor to which a conventional technique is applied.

FIG. 2 is a diagram showing a method of manufacturing a stator block of the motor shown in FIG.

FIG. 3 is a diagram showing a method of forming a stator coil in the stator block of FIG.

FIG. 4 is a diagram illustrating a method of combining stator blocks to form a split stator.

FIG. 5 is a view showing a jig used in the assembling of FIG.

FIG. 6 is an enlarged view of the stator block of FIG.

FIG. 7 is a diagram showing a completed state of the motor of this embodiment.

[Explanation of symbols]

4 rectangular coil wires, 10 stators, 12 stator blocks, 13 teeth, 15, 16 stator coils, 17 regions between teeth, 34 insulating members, 50 rotors.

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H02K 3/18

Claims (6)

(57) [Claims] 1. A predetermined number of electromagnetic steel plates (20) are laminated.
A stator block (12) to be formed, and a coil wire on a tooth portion of the stator block (12).
Rotating machine carp formed by winding (4)
A le and (15, 16), and comprises the rotating machine coils (15, 16) Sutetaburo
The rings (12a, 12b) are arranged in a ring and assembled without gaps.
The contact points of the stator blocks (12a, 12b)
Stator (10) formed by welding
An electrical rotating machine having a rotating machine coils provided adjacent teeth (15, 1
6) have different cross-sectional shapes from each other, each rotating machine coils (15, 16) is, next to the rotating machine coils (16, 1
An electric rotating machine having a cross-sectional shape such that 5) fills the remaining area after occupying the area between the teeth. 2. Laminating a predetermined number of electromagnetic steel plates (20)
In the teeth portion of the formed stator block (12),
A rotating machine coils are formed by winding coil wire (4) (15, 16), the rotating machine coils provided adjacent teeth (15, 1
6) have different cross-sectional shapes from each other, each rotating machine coils (15, 16) is, next to the rotating machine coils (16, 1
A rotating machine coil having a cross-sectional shape such that 5) fills the remaining area after occupying the area between the teeth. 3. Two kinds of rotating machine coils having different sectional shapes
The electric rotating machine according to claim 1 or the rotating machine coil according to claim 2, wherein (15, 16) are alternately arranged. 4. Laminating a predetermined number of electromagnetic steel plates (20)
A stator block (12) to be formed, and a coil wire on a tooth portion of the stator block (12).
Rotating machine carp formed by winding (4)
A le and (15, 16), and comprises the rotating machine coils (15, 16) Sutetaburo
The rings (12a, 12b) are arranged in a ring and assembled without gaps.
The contact points of the stator blocks (12a, 12b)
Stator (10) formed by welding
An electric rotating machine having a plurality of rotating machine coils (15,
16) to fill different parts of the gap between the coils
An electric rotating machine characterized by being arranged. 5. Laminating a predetermined number of electromagnetic steel plates (20)
In the teeth portion of the formed stator block (12),
A turn formed by winding a coil wire (4)
The rotating machine coils (15, 16), each of which is provided on the adjacent teeth (15, 16) .
16) to fill different parts of the gap between the coils
A rotating machine coil characterized by being arranged. 6. A rotating machine coil having two different sectional shapes.
Characterized in that (15, 16) are arranged alternately
The electric rotating machine according to claim 4 or the claim 5 according to claim 5.
Rotating machine coil.