JPS63161849A - Pole change rotary electric machine - Google Patents

Abstract

PURPOSE:To mechanize a rotary electric machine by composing an armature winding in a concentric winding in a single winding double switching type, thereby facilitating a coil inserting work into a slot. CONSTITUTION:A U-phase winding is composed of first-fourth coil groups U1-U4 disposed separately at 180 deg. of electric angle, and the coil groups U1-U4 are so composed that the outer coils 1a-4a of 4 of coil pitch and the inner coils 1b-4b of 2 of coil pitch are concentrically disposed. That is, a first coil group U1 of the U-phase is composed of two coils 1a, 1b corresponding to the number of high speed pole 1-pole 1-phase slots, and the second-fourth coil groups U1-U4 are composed similarly of two coils 4a-4a, 2b-4b. V-phase and W-phase windings are similarly composed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a single winding type pole number switching type rotating electrical machine that performs multiple switching.

(Prior Art) Conventionally, the armature winding of this type of rotating electric machine generally employs a two-layer overlapping winding method.

However, with the two-layer overlapping winding method, it is difficult to mechanize the insertion of the coil into the slot, so conventional pole number switching type rotating electric machines have a problem of extremely low productivity. In order to deal with this, the present applicant has variously considered using a so-called concentric winding method for the armature winding. However, in a simple general concentric winding method, the number of conductors for each slot is all the same, and the degree of freedom in design is small. You may not be able to obtain the characteristics.

(Problems to be Solved by the Invention) The present invention has been made to solve the above problems, and its purpose is to facilitate mechanization of coil insertion, improve productivity, and provide freedom in design. An object of the present invention is to provide a pole number switching type rotating electric machine that can increase the number of poles.

[Structure of the Invention] (Means for Solving the Problems) The pole number switching type rotating electrical machine of the present invention has an armature winding in which the number of slots per high-speed pole is q. Consists of q coils arranged concentrically with one high-speed pole for one phase, and each coil side of the outer coil of each phase of each pole is housed in the same slot as the coil side of the outer coil of a different phase. In addition, it is characterized in that the number of conductors between the outer coil and the inner coil of each pole Ill is made different (1115).

(Function) Since the one-pole, one-phase coil is a concentric winding composed of q concentric coils, the coil insertion work is extremely easy. In addition, the number of conductors between the outer coil and inner coil of each phase of each pole is different, making it a high-speed pole.

The characteristics of the low-speed pole can be changed, increasing the degree of freedom in design.

(Embodiment) A first embodiment in which the present invention is applied to a 4/8 pole switching type three-phase induction motor will be described below with reference to FIGS. 1 to 6. Note that in the drawings, the numbers written within the rectangular frames indicate slot numbers. As shown in the developed diagram of the winding arrangement in FIG. 1, the number of slots is 24, and therefore the number q of slots per high-speed pole is 24/(4X3)-2. In the figure, the U-phase winding is shown by a solid line, the V-phase winding is shown by a chain line, and the W-phase winding is shown by a broken line. For example, each U-phase winding has an electrical angle of 1
First to fourth coil groups u1 to u located 80° apart
Each coil group u1-u4 is constructed by concentrically arranging outer coils 1a-4a with a coil pitch of 4 and inner coils 1b-4b with a coil pitch of 2. That is, the first coil group ul of U-Kan has one high-speed pole 1.
It is composed of two coils la and lb corresponding to the number of phase slots q, and the second to fourth coil groups u2 to u4 are similarly composed of two coils 2a to 4a and 2b to 4b, respectively. There is.

FIG. 2 shows a winding arrangement diagram, in which the U-phase winding is indicated by O, the v-phase winding is indicated by 0, and the W-phase winding is indicated by Δ. Also, the number inside each symbol indicates the number of conductors. For example, in the U-phase winding, the number of conductors in the outer coils (1a to 4a shown in FIG. 1) with a coil pitch of 4 in each coil group u1 to u4 is 1, and the number of conductors in the inner coil with a coil pitch of 2 (the first By configuring the number of conductors 1b to 4b) shown in the figure to be 2, the number of conductors in the odd numbered slots is 2, and the number of conductors in the even numbered slots is 4.

Also, for the V phase and W phase, the electrical angle is 120 with respect to the U phase.
The structure is the same as that of U-11 except that they are arranged with a difference of 240 degrees, and in FIG. The first to fourth coil groups constituting the WF11 winding are designated by numbers w1 to w4.

Here, to further describe the relationship between each phase winding, for example, each coil side of the outer coil 2a of the second coil Ru2 of the U river is
The outer coil 4a of the fourth coil JJw4 of W phase and the second coil J! The outer coils 2a of lv2 are respectively inserted. That is, the outer coil 2a of the U-phase second pole
Each coil side is housed in the same slot as the outer coils 4a, 2a of different phases, that is, V phase and W phase, and this relationship is the same for each pole of all other phases. The first to fourth coil groups of each phase are connected to the first to fourth coil groups of each phase.
The two terminals Ul, U2 . Vl, V2. Wl.

W2 is provided.

Now, in the armature winding having the above-mentioned +M configuration, voltage vector diagrams and magnetomotive force waveform diagrams when the respective terminals are connected as shown in the following table are shown in Figures T52 to 6, respectively.

A voltage vector diagram in the case of four poles is shown in FIG. 3, and it is clear that the three phases are balanced. A voltage vector diagram in the case of 8 poles is shown in FIG. 4, and in this case also 310 is balanced.

On the other hand, the magnetomotive force waveform is as shown in FIG. In the case of 8 poles, the result is as shown in FIG. 6, and it is clear that the three phases are in equilibrium here as well.

According to the first embodiment described above, not only is there no problem with voltage vectors and magnetomotive force waveforms, but since it is a concentric winding, it can be easily applied to slots, which was difficult with the conventional two-layer overlapping winding method. The mechanical insertion of the coil can be easily performed, thereby greatly increasing productivity. or,
Since the number of conductors in the outer coil and the inner coil are different, the characteristics of the high-speed pole and the low-speed pole can be changed, increasing the degree of freedom in design.

Next, a second embodiment in which the present invention is applied to a 4/8 pole switching type three-phase induction motor with 24 slots is shown in FIGS. 7 to 11.
This will be explained with reference to the figures. The difference from the first embodiment is that, as shown in the winding arrangement diagram in FIG.
The number of conductors in the outer coil with a coil pitch of 4 is 2,
By configuring the inner coil with a coil pitch of 2 as having 1 conductor, the number of conductors in odd slot numbers is 4, and the number of conductors in even slot numbers is 2. The rest of the structure is the same as that of the first embodiment, and the coil groups of each phase are connected as shown in FIG. If each terminal of such armature winding is connected in the same way as the previous husband, 1.
4 poles and 8 poles are alternatively configured. The voltage vector diagrams in the case of 4 poles and 8 poles are shown in FIGS. 8 and 9, respectively, and it is clear that the 31st and 31st poles are balanced. or,
10 and 11, the U-phase winding has +1.0. It shows the 4-pole and 8-pole magnetomotive force waveforms at the moment when currents corresponding to -0 and 5 flow through the V-phase winding and the W-phase winding, respectively. Again, it is clear that the three phases are in equilibrium. Even with this configuration, since the coils are wound concentrically, the coils can be mechanically inserted into the slots easily, improving productivity. Furthermore, by changing the number of conductors in the outer coil and the inner coil, the characteristics of the high-speed pole and the low-speed pole can be changed, and the degree of freedom in design can be expanded.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, but can be implemented with various modifications, such as setting the number of phases and the number of poles as desired, without departing from the scope of the invention. .

[Effects of the Invention] As described above, although the present invention is a multiple switching type of single winding system, the armature winding is composed of concentric windings, so the work of inserting the coil into the slot is extremely simple. Therefore, productivity can be greatly improved by mechanizing coil insertion. Also, since the number of conductors in the outer coil and the inner coil are different, the characteristics of the high-speed pole and the low-speed pole can be changed, which has the excellent effect of expanding the degree of freedom in design. .

[Brief Description of the Drawings] Figs. 1 to 6 show a first embodiment of the present invention, in which Fig. 1 is a developed winding arrangement diagram, Fig. 2 is a winding arrangement diagram, and Figs. 3 and 4. The figures are voltage vector diagrams for 4-pole and 8-pole cases, respectively. Figures 5 and 6 are magnetic force waveform diagrams, and Figures 7 to 1.
FIG. 1 is a diagram corresponding to FIGS. 2 to 6 showing a second embodiment of the present invention. In the drawings, u1 to u4. v l~v 4. wl
~ w4 is a coil group for each phase, 1a to 4a are outer coils,
1b to 4b are inner coils. Agent Patent Attorney Noriyuki Ken Yudo Hiroshi Mitsumata Figure 5ul U1 1Jjl U2 U2
u:r-1m r-1-) r--1r-m-) r
--1rth) U3 U3 Ga3 L12
υ4uJ4-A r--1r-1) r-0-r-1)
r--) r--11213141516j7 1
819 2021 2223 242Figure 4

Claims (1)

[Claims] 1. It is a multiple switching type of single winding system, and when the armature winding is the number of slots per one pole of high speed pole is q,
One high-speed pole for one phase is composed of q coils, each coil side of the outer coil of each phase of each pole is located in the same slot as the coil side of the outer coil of a different phase, and each pole of each A pole number switching type rotating electrical machine characterized by having a different number of conductors between the outer coil and the inner coil of the phase.