JPH0453166Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to a winding structure that reduces the number of connecting wires in stator windings of three-phase alternating current generators, alternating current motors, and the like.

B. Summary of the invention By forming two types of tortoiseshell-shaped coils, so-called open coils and cross coils, in the stator winding of rotating electric machines, there is no longer only an open coil as in the past, but there is no cross connection of connecting wires. Therefore, the number of connecting wires can be reduced, resulting in lighter weight and more effective use of space.

C. Prior Art FIG. 4 shows a partial cross section of a three-phase alternating current generator. In Fig. 4, 1 is a stator frame, 2 is a stator core, 3 is a stator coil, 4 is a connecting wire for the stator coil 3, 5 is a cover, 6 is a fan, 7 is a shaft, and 8 is a rotor core. , 9 indicates a field coil, and 10 indicates a fan. In the structure shown in FIG. 4, the stator core 2, stator coil 3, etc. have the structure shown in FIGS. 5 and 6, and a groove 11 in the stator core 2 has a groove. A lower coil 31 is fitted on the bottom 14 side, and an upper coil 32 is fitted on the groove outlet 13 side, and these coils 31 and 32 are held and fixed within the groove 11 by the wedge 12.
The state in which the upper and lower coils 31 and 32 are fitted is the seventh
As shown in the figure, it is formed in a hexagonal shape with a fixed number of grooves, and in the example shown in FIG. 7, each groove has four coil conductors, indicating a two-layer winding. Figure 7 shows the two poles of the N-pole coil and the S-pole coil of one phase of the three-phase winding, and the wires of the N-pole coil and the S-pole coil are made so that they do not intersect. It is an open coil. In other words, when a hexagonal coil has two turns, the inlet line at the beginning of the first turn and the outlet line at the end of the second turn do not intersect, as shown in Figure The inlet wire (the part that connects to connection wire A) and the outlet wire (the part that connects to connection wire B) of the middle N-pole coil do not intersect, making it a so-called open coil, and the inlet wire of the S-pole coil The opening wire (the part that connects to the connecting wire B) and the outlet wire (the part that connects to the connecting wire C) do not intersect, making it an open coil.
Therefore, in order to create polarity, it is necessary to cross the connecting wires A and C. In other words, in the example shown in Fig. 7, the connection wires A and B of the N-pole coil do not intersect and are in an open connection, whereas the connection wires B and C of the S-pole coil intersect. It is connected.

FIG. 8 shows an example of a three-phase coil manufactured using such open connection and cross connection of connection wires. Therefore, all of the hexagonal coils shown in FIG. 8 are open coils. As shown in Fig. 8, there are three cross connection parts KA1 to KA3, KB1 to KB3, for each phase of the three-phase winding.
KC1 to KC3 exist, and in order to prevent the connection wires of each phase from colliding with each other when connecting three phases, the connection wires should be arranged in a maximum of four rows as shown in Figure 5. 41, 42, 43, and 44 are required.

D. Problems to be solved by the invention Since there are a large number of connecting wires arranged, there are various problems such as the length of the material is increased, the number of heat sources is increased, the space is taken up, and the weight is heavy.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, the present invention aims to provide a fixed individual winding for a rotating electrical machine that reduces the number of connecting wires arranged.

E. Means for Solving the Problems The present invention achieves the above-mentioned purpose by forming two types of hexagonal coils, one with intersecting wires and the other with non-intersecting wires, and by arranging them alternately. This eliminates the crossing of lines and allows the connecting lines to be arranged in a maximum of three columns.

F. Embodiment An embodiment of the present invention will now be described with reference to FIGS. 1 to 3. Note that the same parts as in FIGS. 4 to 8 are given the same reference numerals. In Fig. 1, a hexagonal coil with two poles, a single-phase N-pole coil and an S-pole coil, is formed. Of these, the N-pole coil is a so-called open coil, and is connected to the inlet wire of the lower coil 31. This is a conventional coil in which the upper coil 32 and the outlet line of the upper coil 32 do not intersect. More specifically, the end of the first turn corresponding to the upper coil is connected to the beginning of the second turn corresponding to the lower coil without crossing the inlet line of the first turn corresponding to the lower coil. Furthermore, the outlet wire of the second turn corresponding to the upper coil is formed without crossing the winding start portions of the first and second turns corresponding to the lower coil. On the other hand,
The S-pole coil is a cross coil formed by crossing an inlet line and an outlet line. Specifically, the end of the winding of the first turn corresponding to the upper coil is crossed with the inlet line of the first turn corresponding to the lower coil, and the outlet line of the second turn corresponding to the upper coil is crossed as shown above. It crosses the entrance wire of the first turn and the winding start part of the second turn, which corresponds to the lower coil. Since the inlet and outlet wires are in the same relationship as the upper coil 32 and the lower coil 31, their intersection can be easily made. For this reason, the connection between the connecting wire and the mouth wire can be an open connection without crossing not only the N-pole coil but also the S-pole coil.

Figure 3 is a three-phase wiring diagram corresponding to Figure 8, with 18 grooves, 6 poles, 1 groove per pole and 1 phase, 4 conductors per groove, and an open coil wire. 9
It is made by connecting 9 coils whose mouth wires are cross coils. For each phase, if open coils and cross coils are arranged alternately and three-phase connections are made using connecting wires, the arrangement will be a maximum of three rows (see also FIG. 2, 41, 42, and 43) without colliding with each other.

G. Effect of the invention Even when a three-phase connection is made by creating both crossed coils and open coils and arranging them alternately as explained above, the arrangement of the connecting wires is such that there is no cross connection. This reduces the total number of connecting wires, reduces materials and insulation, reduces heat generation sources, reduces weight, and makes effective use of space.

[Brief explanation of the drawing]

Figures 1 to 3 show one embodiment, Figure 1 is an explanatory diagram of a coil for two poles, Figure 2 is a diagram of the connection state of the coil and connecting wire, and Figure 3a is a three-phase winding. Fig. 3b is a three-phase winding connection diagram, Fig. 4 is a partial cross-sectional view of a three-phase alternating current machine, Fig. 5 is a connection state diagram of a conventional coil and connection wire, and Fig. 6 is a connection diagram of a three-phase alternating current machine. 7 is an explanatory diagram of a conventional two-pole coil, FIG. 8a is a three-phase winding state diagram, and FIG. 8b is a three-phase winding connection diagram. In the drawing, 31 is the lower coil, 32 is the upper coil, 4
1, 42, and 43 are connection lines.

Claims (1)

[Scope of Claim for Utility Model Registration] One coil formed in a hexagonal shape is made up of two turns, with an entrance line at the beginning of the first turn and an exit line at the end of the second turn. In a stator winding in which the outlet wire of one coil and the inlet wire of another coil are connected by a connecting wire, the inlet wire of one coil and the inlet wire of the first turn is A cross coil in which the end of the winding of the first turn intersects, and the outlet line of the second turn intersects the inlet line of the first turn and the start of winding of the second turn, and other coils. The end of the winding of the first turn is connected to the beginning of the winding of the second turn without crossing the entrance line of the first turn, and the exit line of the second turn is connected to the first turn and the exit line of the second turn. A stator winding for a rotating electric machine in which open coils formed without intersecting the winding start of the second turn are arranged alternately.