JPS6321161Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the structure of a salient pole rotor for a rotating electrical machine, and particularly to improvements in the lead wires that connect the coils.

The structure of a conventional salient pole rotor will be explained with reference to FIGS. 1 and 2.

Note that FIG. 2 is a plan view seen from the outer periphery with the magnetic pole piece 4 of FIG. 1 removed.

1 and 2, 1 is a shaft portion, 2 is a plurality of magnetic poles arranged circumferentially at equal intervals on this shaft portion 1 and protrudes in the radial direction, and 3 is a band-shaped material around the magnetic pole 2. A coil that is continuously wound and stacked in the radial direction,
Reference numeral 3a indicates a strip-shaped lead wire that extends circumferentially from the upper end of the coil 3 and is connected to each other; 4 indicates a magnetic pole piece that is provided on the outer periphery of the magnetic pole 2 and holds the coil 3 in the radial direction (the magnetic pole piece 4 is connected to the magnetic pole piece 4; 2), 5 is a wedge-shaped coil holding member provided between the coils 3, 3, and 5a is a coil holding member 5.
6 is a bolt for tightening the coil holding member 5 to the shaft portion 1, and 7 is a bolt for tightening the lead wire 3a to the coil holding member 5.

The coil 3 wound around the magnetic pole 2 is held from the outer periphery and from the sides by a magnetic pole piece 4 and a coil holding member 5, respectively, in order to withstand the centrifugal force caused by the rotation of the shaft portion 1. The coil 3 is connected to an adjacent coil 3 by a lead wire 3a. Exit line 3a
The center portion is tightened with a bolt 7 to prevent lifting due to centrifugal force.

Since the conventional rotor is constructed as described above, the coils and lead wires thermally expand and contract when the rotating electric machine is turned on and off. The distortion caused by the expansion and contraction of the coils is applied to the lead wires between them, but because the lead wires are entirely restrained by bolts, there is a risk of them breaking if the expansion and contraction is repeated for a long period of time.

This idea was made in order to eliminate the above-mentioned drawbacks.A groove is formed on the outer periphery of the coil holding member, and a part of the lead wire is slackened to form a bent part. By locking a part of the part to the bottom of the groove and forming multiple vertically long notched grooves in the bent part, the lead wire is held and can freely expand and contract without breaking during rotation. The object of the present invention is to provide a rotor for a rotating electrical machine that does not float up.

An embodiment of this invention is shown below in Figures 3 to 5.
The diagram will be explained. Figure 4 shows the magnetic pole piece 4 in Figure 3.
It is a top view seen from the outer circumferential side with the parts removed. In the figure, reference numeral 10 denotes a groove that is opened on the outer periphery of the central portion in the circumferential direction of the coil holding member 5 and is recessed to a predetermined depth toward the inner circumferential side. The intermediate portion between the outer circumferential surface of 5 and the outer circumferential surface of 5 is an inclined surface. Reference numeral 8 denotes a strip-shaped lead wire extending from the upper end of the coil 3 to connect the adjacent coil 3, and both ends in the longitudinal direction are brazed and connected as shown in FIGS. 3 and 4. has been done. Reference numeral 8a denotes a bent portion in which the central portion in the longitudinal direction of the lead wire 8 is made to slacken toward the inner peripheral side and protrude, and is inserted into the groove 10 in the radial direction. The lead wire 8 is held with both ends in contact with the outer peripheral surface of the coil holding member 5,
The longitudinal center portion of the bent portion 8a is the bottom portion 11 of the groove 10.
A gap is provided between the peripheral wall of the groove 10 other than the groove bottom 11 and the lead wire 8 so that the lead wire 8 does not hit the peripheral wall of the groove 10 when it is deformed during expansion and contraction. It is being As shown in FIG. 5, a notch groove 9 is formed over almost the entire length of the lead line 8, extending in the longitudinal direction and dividing the lead line 8 into a plurality of sections in the width direction.

Note that the configuration of other components is the same as that of the conventional one.

When the lead wire 8 thermally expands or contracts, deformation occurs, but since there is a space between both sides of the locking portion of the bent portion 8a and the circumferential wall of the groove 10 to allow the deformation, the lead wire 8 is deformed. The wire 8 can be freely deformed within the groove 10 and will not break as in conventional wires. Further, since the lead wire 8 is locked at the groove bottom 11, even when centrifugal force is applied, the lead wire 8 on the surface of the coil holding member 5 is pulled against the lead wire 8 inserted into the groove 10. As a result, the lead wire 8 is pressed against the surface of the coil holding member 5, and the lead wire 8 does not float up. The number, width, and length of the notched grooves 9 provided in the lead line 8 are determined so that the lead line 8 does not float up and can be freely deformed.

As described above, according to this invention, a groove that is open on the outer periphery and recessed to a predetermined depth on the inner periphery side is formed in the coil holding member, and a part of the lead wire is slackened to form a bent part. part into the groove, a part of the inserted part is locked to the bottom of the groove, and a part of the inserted part is placed between the bent part on both sides in the longitudinal direction of this locked part and the circumferential wall of the groove when the lead wire expands and contracts. Since we set an interval that allows for the deformation of
The lead wire can freely deform due to expansion and contraction without being restricted in any way and will not break, and will not float when centrifugal force is applied. In addition, since a plurality of cutout grooves having a predetermined length extending in the longitudinal direction and dividing the width direction are formed in the bent portion, the bent portion is subdivided into narrow strips, making it easier to deform.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the main parts of a rotor of a conventional rotating electrical machine, Fig. 2 is a plan view of Fig. 1 seen from the outer periphery with the magnetic pole pieces removed, and Fig. 3 is an embodiment of the invention. Front view showing the main parts of the rotor of the rotating electric machine, No. 4
The figure is a plan view seen from the outer periphery with the magnetic pole piece of FIG. 3 removed, and FIG. 5 is a perspective view showing the lead line according to an embodiment of the invention. 1...Shaft part, 2...Magnetic pole, 3...Coil, 4...
... Magnetic pole piece, 5 ... Coil holding member, 8 ... Lead wire, 8a ... Bent part thereof, 9 ... Notch groove, 10
...Groove, 11...its bottom. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] a plurality of magnetic poles provided on the shaft at intervals in the circumferential direction; a plurality of coils wound around each of these magnetic poles; and a coil interposed between these coils and fixed to the shaft. A rotor for a rotating electrical machine comprising a coil holding member that holds a side surface of the coil holding member, and a strip-shaped lead wire that is arranged in contact with the outer periphery of the coil holding member and connects the adjacent coils. forming a groove in the holding member that is open on the outer periphery and recessed to a predetermined depth on the inner periphery side, and providing a bent part that is slackened so that it can expand and contract in the lead wire;
This bent part is inserted into the groove, and the longitudinal center part of the inserted bent part is locked to the bottom of the groove, and the bent parts on both sides of the locked part in the longitudinal direction are connected to the peripheral wall of the groove. A space is provided between them to allow for deformation during expansion and contraction of the lead wire, and a predetermined length of a predetermined length extending in the longitudinal direction and dividing into a plurality of parts in the width direction is provided at the bent portion on both longitudinal sides of the locking part. A rotor for a rotating electrical machine, characterized by having notched grooves formed therein.