JPH09154247A - Multi-phase armature winding - Google Patents

Abstract

(57) Abstract: To reduce the number of coils, simplify winding work by relatively regular combination of coil groups, and reduce the number of coil sides per groove by chain winding. Since it can be done, it is easy to store in a machine. SOLUTION: The number of grooves q of each pole and each phase is q = A + B / C,
In the non-integral groove winding winding represented by (A, B, C> 0 integer, B, C: prime number), a constituent group having a C pole portion as one coil group has A continuous coils. B and (A / 2)
This coil is composed by combining B coils and
C) times are repeated to form one phase, and (m /
C) × A multi-phase armature winding in which all windings are repeated several times and all windings are made up of non-integral groove windings.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-phase armature winding using a chain winding method of non-integral groove winding used in a multi-phase AC rotating electric machine.

[0002]

2. Description of the Related Art As is well known, there are three types of armature windings in a multi-phase AC rotating electric machine, that is, lap winding, wave winding, and chain winding, and these are appropriately selected according to the type and characteristics of the rotating electric machine. Has been done. Regarding the relationship with the number of grooves of the armature core, there are integer groove winding in which the number of grooves q corresponding to each pole is an integer, and non-integer groove winding or fractional groove winding in which it is an integer or a fraction. , Both are widely adopted. Among them, the non-integral groove winding and the fractional groove winding have a large degree of freedom in design and can improve the voltage waveform. Therefore, they are used in a rotating machine having a relatively large number of poles.

Most of the fractional windings in which the number of grooves q of each pole and each phase is represented by q = A + B / C (where A, B, C> 0, B / C are irreducible fractions) are overlapped windings. Wires are employed, the magnetic poles of which are made up of windings formed by a combination of irregular coil groups.

FIG. 4 shows an example of a conventional fractional winding coil arrangement. Number of phases m = 3, number of poles P = 10, total number of grooves Z = 72,
This is an example in the case of lap winding, the number of grooves per pole and phase q = 2 (2/5), and groove pitches # 1 to # 8. One phase coil group is 3
3 continuous coils and 2 continuous coils, 2 coils, 3 coils
It is configured by repeating a combination of two pieces, two pieces, and two pieces twice. The other two phases are constructed in exactly the same way,
The phase difference between each phase is (2/3) π as in general integer winding.
They have different phase differences.

[0005]

The conventional winding method has the following drawbacks. That is, (1) winding work is complicated due to an irregular combination of coil groups. (2) The total number of coils is equal to the total number of grooves, and the number of coils is large.

(3) Due to the lap winding, it is difficult to wind the machine and store it in the machine. In order to improve the above-mentioned drawbacks, the present invention enables a fraction winding represented by a groove number q of each pole and phase represented by q = A + B / C by a chain winding, and the total number of coils = 1. / 2 The number of coils is reduced as the total number of grooves, the winding work is simplified by the relatively regular combination of coil groups, and the number of coil sides per groove is 1 due to the chain winding. Therefore, improvements such as facilitating storage in a machine are obtained.

[0007]

According to the present invention, the number of grooves q of each pole and each phase is q = A + B / C, (A, B, C> 0 integer, B,
In the non-integer groove winding represented by (C: prime number), a constituent group having a C pole portion as one coil group has A continuous coils and B (A / 2) coils. It is made by combining B pieces, and this configuration is repeated (number of poles / C) times to form one phase, and (m / C) × number of poles is repeated with m-phase windings so that all windings are non-integer groove windings. Is a multi-phase armature winding.

Then, the number of coils is reduced as the total number of coils = 1/2 total number of grooves, the winding work is simplified by the combination of relatively regular coil groups, and the coil per groove is formed by the chain winding. Since it is possible to have only one, it has excellent effects such as facilitating storage in a machine.

[0009]

DETAILED DESCRIPTION OF THE INVENTION The configuration of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the coil arrangement of the present invention. FIG. 2 shows a voltage vector diagram of each phase winding of the electromotive force induced in the coil wound according to the present invention. FIG. 3 shows an instantaneous magnetomotive force distribution when a three-phase alternating current flows through a coil wound according to the present invention.

The coil arrangement of the present invention of FIG. 1 comprises the following elements. Number of phases m = 3, number of poles P = 10, total number of armature grooves Z = 7
2. Chain winding, coil pitch # 1 to # 8 and # 2 to # 7
2 continuous coils and the coils of # 9 to # 15 are combined to form a coil group, and the number of grooves q of one pole and one phase is q = 2 (2 /
5). 1 to 72 in FIG. 1 indicate armature groove numbers. The solid line indicates the U-phase coil, the chain line indicates the W-phase coil (symbol omitted), and the alternate long and short dash line indicates the V-phase coil (symbol omitted).

The coil arrangement for the U phase will be described. 1
A constituent group with one coil group of 0 poles has two continuous coils (U ₁₁ + U ₁₂ and U ₁₅ + U ₁₆ ) and 2 /
A configuration in which 2 = 1 coils are combined with two coils (U ₁₃ and U ₁₄ ), and this configuration is repeated 10/5 = 2 times. That is, 2
Two continuous coils (U ₁₇ + U ₁₈ and U ₂₁ + U ₂₂ ),
A configuration in which 2/2 = 1 coil is combined (U ₁₉ and U ₂₀ ), and the above configuration is repeated twice to form one phase. The coil pitch of two continuous coils is # 1 to # 8 and #
It is a chain winding coil with 2 types of coil span of 2 to # 7,
One coil is a chain winding coil having a coil span of # 9 to # 15.

FIG. 2 shows the voltage vector of each phase winding of the electromotive force induced in the coil wound by the coil arrangement of FIG. 1. The induced electromotive force of the U-phase, V-phase and W-phase is , Each have a phase difference of (2/3) π, and are well balanced.

FIG. 3 shows the instantaneous magnetomotive force distribution when a three-phase alternating current flows in this embodiment. As is clear from the figure,
It has 10 poles. In the case of the configuration shown in the present embodiment, the total number of coils = (1/2) × 72 = 36, and the number of coils is reduced, and the number of coil groups is relatively regular, such as 2, 1, 1, and 2. It is possible to combine various coil groups and simplify winding work. Further, since it is a chain winding, the number of coil sides per groove can be one, so that it can be easily housed in a machine.

[0014]

According to the multi-phase armature of the present invention, the fraction winding whose groove number q of each pole and each phase is represented by q = A + B / C is made possible by the chain winding. The number of coils is reduced to 1/2 the total number of grooves, the winding work is simplified by the relatively regular combination of coil groups, and the number of coils per groove is reduced to one by the chain winding. Since it can be achieved, it has excellent effects such as facilitating storage in a machine.

[Brief description of the drawings]

FIG. 1 is a coil layout diagram of the present invention,

FIG. 2 is a voltage vector diagram of an electromotive force induced in a coil according to the present invention,

FIG. 3 is an instantaneous magnetomotive force distribution map of a coil wound according to the present invention,

FIG. 4 is a view equivalent to FIG. 1 of the related art.

[Explanation of symbols]

1-72 ... groove number, U, V, W ... phase terminal U ₁₁ ~U ₂₂ ... U-phase coil, V ₁₁ ~V ₂₂ ... V-phase coil, W ₁₁ ~W ₂₂ ... W-phase coil.

Claims (2)

[Claims] 1. The number of grooves q of each pole and each phase is q = A + B / C,
In the non-integral groove winding winding represented by (A, B, C> 0 integer, B, C: prime number), a constituent group having a C pole portion as one coil group has A continuous coils. B and (A / 2)
This coil is composed by combining B coils and
C) times are repeated to form one phase, and (m /
C) A multi-phase armature winding characterized in that all windings are repeated by a number of poles and all windings are made up of non-integral groove windings. 2. When the coils of the first coil group are A continuous coils, the coil pitches are #n to # (n + 7) and #.
A chain winding coil having two types of coil spans (n + 1) to # (n + 6) (where n is a natural number). In the case of (A / 2) coils, the coil pitch is #n to # (n + 6). The multiphase armature winding according to claim 1, each of which is a chain winding coil having a coil span.