JPS5950738A - Coils for armature with noninteger number slots - Google Patents

Abstract

PURPOSE:To enable to automate a winding work and to reduce the time of the winding work by eliminating to fill insulators between coils of different phases. CONSTITUTION:Coils u1-u3 are concentrically wound in a phase U, the coils u1, u2 are wound in a simple layer winding and are disposed outside, the coil u3 is wound in a double layer winding contained at both sides in the same slots 9, 14 with coils w9, v6 of other phases, and is disposed at the innermost periphery to form a pair of poles. Then, the leading position is located at the side of the phase U, i.e., the coil of a slot 42 in which the position of the phase V is displaced at 840 deg. of an electric angle with the side of the oil of a slot 7 as a reference, the position of the phase W is further displaced at 840 deg. of an electric angle from the phase V, i.e., at the side of the coil of a slot 32. One end of the coil of the outermost periphery is led to the side of the coil of the slot 7, sequentially wound in the inner periphery, one end of the coil of the innermost periphery, and lead wire led from the side of the coil of the slot 14 is sequentially connected to one end of the coil of the outermost periphery of pairs of rightside adjacent pole and to the side of the coil of the slot 22 in such a manner that the directions of currents become the same. The other phases V, W are similarly connected, but the coils are connected between the poles in the phase W, and the coils are connected in reverse direction between the phases V and W.

Description

[Detailed description of the invention]

[Technical Field of the Invention] The present invention is a three-phase motor used in AC rotating electric machines! , relates to Isogo winding, and relates to improvement of %CC double chain spring winding type irregular number structure armature winding. [Technical background of the invention and its problems] In a three-phase AC rotation machine, a plurality of axial grooves are provided on the inner peripheral surface of a cylindrical armature core, and the armature winding is wound therein.
Form the armature. There are three types of armature winding: type winding, wave winding, and chain winding.
2. Selected accordingly. Conventional three-phase AC rotating electric machines often used a two-layer type winding system, but recently, the number of coils is small, there are few connections between coils, it is easy to insulate the coils, and it is easy to insert into the groove of the iron core. Focusing on its advantages, the single-layer chain winding method is increasingly being adopted. This tendency is particularly strong for multi-polar machines where the total number of coils increases. In addition, when one coil side is placed in one groove, it is called single-layer winding, and when two coil sides are placed in one groove, it is called double-layer winding. In addition, there are cases in which the number of grooves corresponding to the number of grooves C is an integer number, and cases in which the number of grooves is an integer number, that is, a fraction.The former is called integer groove winding, and the latter is called irregular number groove winding or fractional groove winding. Both are widely used. Irregular number groove winding is often employed in rotating electric machines having a relatively large number of poles, such as L7. The reason for this is that although the selection range for the number of parallel circuits is narrow for irregular number groove winding, it is possible to select a large number of grooves using an integer multiple of the number of poles, so there is a greater degree of freedom in design, and it is easier to improve the voltage waveform. This is because there are advantages. In the irregular number groove winding system, the number of grooves per pole and phase, 4, is generally expressed by the following equation using integers A, B, and C. That is, f= is a case where A≧2 and dan-1, that is, it is a three-phase 2 , so the concrete number of C two poles and the number of grooves is 4 poles and 30 grooves. These include 42 grooves, 6 poles and 45 grooves, 8 poles and 60 grooves, and 12 poles and 90 grooves. An example of a conventional single-layer chain winding system will be described below with reference to the drawings. Figure 1 is an expanded connection diagram of the armature winding for a three-phase, six-pole, 45-groove case.How many grooves are there for each pole and each phase? =2+1, that is, A=2. Although it was described above as a single-layer winding, most of the winding is a single-layer winding (two-layer winding), and a partial example is a fourth groove (-) in which two-layer winding is mixed. In the figure, rr, v, w, x,
y and z are the terminal symbols of the armature lead wires, "i -" 9
+ -1"" 91 vPl to -9 represent the coils for each phase, and the numbers (1) to (g)) represent the structure numbers of 'i' and +e, respectively. If we focus on the ■ phase (coil represented by a solid line, 5cl-sLg) in Figure 1, we can see that the chain-wound coil has one pole pair between Ll and 1L2°, and since it is an example of six poles, there are three camellia pairs. Consists of. -1 is 1 coil (= person ÷ time = 1)
2, and the adjacent coil group consists of Juku 2 and μB, 2 coils (
-'-+1=2), resulting in a single pole pair. Similarly “4+
``?'' each consists of one coil, and the adjacent town, cram school 6, and L8.u9 each consist of two coil groups.μB, ``6. ``The 9th phase is housed in the same groove 512 layer as the adjacent phase.The same goes for the other V and W phases.Generally, based on the U phase coil opening, the
° (same as electrical angle) W phase is taken out from the 240° position,
Each coil is connected in series in the order of the subscript of the coil code,
The terminal ends are x, y, and z. If the electrical angle of the groove pitch is θ, then FIG. 2 shows an example in which the developed connection diagram of FIG. 1 is connected in a 1×Y (star-shaped) C connection. Town~sL9+'1~? 9. w1~11
The coils of each phase are shown with diagonal lines, which are in the same groove as the coil of the adjacent phase! : The coils that can be stored, and their relationships are indicated by arrows. All the coils housed in the same groove are of different phase, and there is a gap between each coil.

[: Because there is a potential difference, it was necessary to insert an insulator between the sides of the coil in the groove to strengthen the insulation. The potential difference [two are described below]. The potential difference between coils of different phases in the same groove is the neutral point of the Y connection (
The distance between the coils far from the connection points of x, y, and z is very high.
If it is stored, a high potential difference will occur. For example, the coils 8 and '8+ are stored in the 14th groove in Figure 1, and the coils P8 and υ8 are stored in the 19th groove in Figure 1.
is the maximum potential difference. Assuming that the potential difference between the different phase coils is E and the power supply voltage is (■), the potential difference between the above different phase coils is as follows. In this case, two different phase coils can be assembled in the same groove.
8+ sL6+ ”(1+ '8+ '6+ '9+
Since -8+ -6+-9 each have half the number of turns of the other coils, and Nu has the number of turns close to half, the potential difference between these coils is also proportional to the number of turns, and is calculated as the half potential difference of the other coils. Even if there are two other coils C, the same calculation is performed and the minimum potential difference is found to be E←0.07v. Although the minimum potential difference is 0.07 times the power supply voltage, the maximum potential difference is 0.73 times the power supply voltage.
If coils of different phases are housed in the C grooves as described above, it will be necessary to insert an insulator between the coils of different phases to strengthen the insulation between the coils. For this reason, when winding the armature winding in the core groove, C2 requires the work of inserting an insulator between the different-phase coils, making it difficult to mechanize the winding work, and even if it is inserted by machine, it will not work. The conventional drawback was that the insulation was not stable and the worker had to make corrections by hand. In addition, the coil pattern constitutes a coil group with one pole pair.
Since it consists of 11 coils and 2 groups of coils wound in the opposite direction, it has the disadvantage that a long coil winding time C1 is required. This also applies when A is another positive integer. [Object of the invention] The present invention eliminates the need to insert two insulators between coils of different phases,
It is an object of the present invention to provide a C-shaped irregular number structure armature winding that enables automation of winding work and reduces winding work time. [Summary of the Invention] In the present invention, the armature core is wound around an armature core having a plurality of grooves, and the number of grooves for each pole and each phase varies. is a positive integer and g−=
h+' and s (A+1) coils form one pole pair for each phase, and A coils are arranged as single-layer windings and one coil is placed in the same groove as the coils of other phases as two-layer windings. In the irregular number structure armature winding for three-phase alternating current, one coil with two-layer winding is arranged on the innermost circumference of A number of single-layer winding coils, and one pole pair is formed as a concentric winding. One end of the outermost coil of a predetermined 1'@L pair of coils is set as the lead of one phase, and the end of the coil of one pole pair is set at a position where the lead of the next phase coil is shifted by 8400 electrical degrees. Take one end of the outer coil, and further set the lead of the other phase coil to 840 in electrical angle.
Connect one end of the outermost coil of one pole pair coil at shifted positions, and connect only the ] phase of the three-phase winding so that the connection direction between the pole pair coils is opposite to the other phases. By connecting the end of each phase winding as the neutral point of the Y-connection, the potential difference between different phase coils in the same groove is reduced, an insulator is not required between the coils, and the coils of one pole pair are concentric. The coil winding time can be reduced by winding the coil. [Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 3 and 4. FIG. 3 is a developed connection diagram in the case of a 3-phase, 6-pole, 45-groove winding, similar to the conventional irregular-number structure armature winding described above. Number of grooves for each pole and each phase f=A+', in this case A=2
So g, = 2 +-! − is. 2
2. FIG. 4 is a diagram of FIG. 3 connected to IXY, taking into account the phase, and the respective symbols are the same as in the conventional example. In Fig. 3, the shape and arrangement of the coils is different from the conventional example; for example, in the U phase, 8 coils with "l+w2+" are concentrically wound, ul,! Coil No. 2 is a single-layer winding located on the outside, and coil No. 8 is a two-layer winding whose both sides are housed in the same grooves #9 and #14 as the coils eo and Pa of other phases, respectively, and is located on the innermost periphery. They are located in two positions to form one pole pair. This example is 61f! j, one phase is formed by three pairs of poles. The same is true for the ■phase and the W phase.
The position of the W phase is shifted from the g2 phase by 840 degrees in electrical angle, that is, the coil side of the #32 groove. Connect to one end of the outermost coil of the concentric winding, for example #7
Using the coil side of the groove as an outlet, wind it sequentially to the innermost coil.For example, one end of the innermost coil is connected to the outermost circumference of the pole pair on the right. Connect one end of the coil to the coil side of the #22 groove, for example, so that the current direction is the same. ■The phase also follows the U phase. World W
Regarding the phase, the current direction of the coil is the same as other phases,
The connections between each pole pair are connected in the opposite direction to the other two phases U and V, that is, in a counterclockwise direction. Figure 4C The end ends of each phase winding in Figure 3, X, Y, and Z, are connected to take the phase into account, and are connected to IXY. , Kg. '8+ -6w-9+ν8. At the top, υ9 pieces are housed together with different-phase coils in the same groove, and their relationship is shown by arrows. Next, the effect In will be explained. When different-phase coils are housed in the same groove, the potential difference E is high between the coils #1, which is far from the center of the Y connection, as in the conventional example. becomes. When calculating this potential difference E, when the power supply voltage is V, it becomes as follows. Next i Nikoil sLa and too, 1-a and”
9+? 8 and uPg. νB and μ9. ``When finding the potential difference E between 8 and Fg,
becomes. Next Locoil Juku 6 and m1Pa, ? 6 and υ6
When calculating the potential difference E with respect to C, it becomes as follows. Further ζ Nicoil payment 6? When calculating the potential difference E with respect to 0, it becomes as follows. That is, the maximum potential difference with respect to the power supply voltage v is approximately 57
2, the minimum potential difference is reduced to about 25%. Therefore, for example, if the power supply voltage V is 200 volts, the maximum potential difference E between the coils is E = 200 x O, 57 = 114 volts, and the minimum potential difference E is E = 200 x 0.25 = 50 volts. Therefore, there is no need for an insulator between the coils of different phase in the sieve and the winding of the coils and the cutting of the coils into the grooves of the armature core can be automated by a machine. Further, by concentric winding, a coil group of one pole pair can be continuously wound with three coils, which greatly improves work efficiency. The above description has been made for the case where A is an even number of 2, but it may be any positive integer, and the same thing can be done even when A is an odd number of 3, for example. A developed connection diagram in this case is shown in FIG. In this case, the number of grooves naturally changes 1. ．． 631g and 3 phase 61f1
Forming the winding of C1 becomes C2. It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings.
Of course, it can be implemented with some modification. [Effects of the Invention] As explained above, in C2 and C2 of the present invention, when two different-phase coils are housed in the same groove in the irregular ridge-groove armature winding, the potential difference between the coils becomes low, There is no need for insulators between different phase coils in the same groove, and the process from coil winding to placing the C coil in the groove of the electric carpet iron core can be automated using machine S2.
Since the coil group of pole pairs can be continuously wound ≦2 times with a plurality of coils, an irregular ridge-groove armature winding can be obtained that can greatly improve work efficiency.

[Brief explanation of drawings]

Figure 1 is an expanded connection diagram showing a conventional irregular ridge and groove armature winding.
Figure 2H Wiring diagram connecting the winding IXY in Figure 1, Figure 3
The figure is a developed connection diagram showing one embodiment of the irregular ridge-groove armature winding of the present invention, FIG. 4 is a connection diagram in which the winding shown in FIG. 3 is connected to IXYI, and FIG. 5 is a diagram showing another embodiment. It is a developed connection diagram. 1 to 63...Slot number 1L1 to S9...U phase coil %Pl-S-g...V phase coil ψ1 to ψ9...W phase coil

Claims (1)

[Claims] The armature core has 12 windings each having a plurality of grooves, the number of grooves f for each pole and each phase is 1p = A+', where A is a positive integer, and one pole pair for each phase is formed by (A+1) coils. A number of coils are arranged as single-layer windings and one coil is placed in the same groove as the coils of other phases as two-layer windings. -, the innermost periphery of A coils with single-phase winding: one pole pair is formed as a concentric winding with one coil of two-layer winding arranged, and one pole is shifted by 840 degrees in electrical angle. One end of the outermost coil of a pair of coils, and one end of the outermost coil of a one-pole pair of coils at a position 840 degrees electrical angle apart from the opening of the other phase coil. Connect only one phase of the windings in such a way that the connection direction between the pole and coil is reversed from the other phases, and connect the end of each phase winding as the neutral point of the Y connection. Features an irregular number tI# armature winding.