JPH04325849A - Rotor structure of electric rotating machine - Google Patents

Abstract

PURPOSE:To suppress temperature rise of concentric field winding by supplying cooling air between concentric field windings inserted with interval chips. CONSTITUTION:Guide protrusions 9 for forming the intervals, communicating respective concentric field windings 1, between respective binds 4a-4d are provided on an interval chip 5 inserted between the concentric field windings 1.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a rotor structure for a rotating electric machine having concentric field windings.

0002

2. Description of the Related Art FIG. 4 is a partially cutaway plan view showing the rotor structure of a conventional rotating electrical machine. In the figure, 1 indicates a concentric field winding, and 2 indicates a concentric field winding 1. The rotor core 3 is wound with rotor slots for storing the concentric field winding 1 punched in the rotor core 2, and 4a and 4b are the concentric field windings as shown in FIG. 1 is a fixing bind; 5 is a spacing piece inserted between the coil end portions of the concentric field winding 1; and 6 is a gap generated between the spacing piece 5 and the concentric field winding 1. A filler 7 is a tape for fixing the spacing piece 5 and the filler 6 to the concentric field winding 1, and 8 is a ventilation hole provided at the coil end of the concentric field winding 1. Further, the spacer piece 5 is a rectangular parallelepiped block with a solid structure, as shown in FIG.

Next, the operation will be explained. The concentric field winding 1 is housed in a rotor slot 3 provided in a rotor core 2. After insertion, rectangular parallelepiped spacing pieces 5 are inserted between the coil end coils of the concentrically wound field windings 1 in order to prevent these concentrically wound field windings 1 from being deformed in the parallel direction. When inserting the spacing piece 5, a filler 6 is inserted together with the spacing piece 5 in order to fill the gap generated between the spacing piece 5 and the concentrically wound field winding 1. The spacing piece 5 and the padding 6 are fixed to the concentric field winding 1 by means of a fixing tape 7. The binds 4a and 4b are wound around the coil end portions of the concentrically wound field winding 1 to prevent the coil end portions from being deformed and the spacing pieces 5 from falling off due to centrifugal force during rotation. Also,
When winding such binds 4a, 4b, each bind 4a, 4b is spaced apart so as to form a ventilation hole 8 for flowing cooling air into the coil end portion of the concentric field winding 1. wrapped. Note that this ventilation hole 8 has a spacer piece 5.
is not inserted.

0004

[Problems to be Solved by the Invention] Since the rotor structure of the conventional rotating electrical machine is constructed as described above, in addition to the fact that the spacer piece 5 is a non-ventilating rectangular parallelepiped block, it is difficult to In order to prevent the spacing piece 5 from falling off due to the centrifugal force of There were issues such as raising the temperature of the wire. Note that, as a rotor structure of such a conventional rotating electric machine, a similar technique is described in, for example, Japanese Unexamined Utility Model Publication No. 59-99652.

[0005] This invention was made to solve the above-mentioned problems, and it is possible to flow cooling air also between the concentric field windings, thereby effectively suppressing the temperature rise of the field windings. The purpose of this study is to obtain a rotor structure for a rotating electrical machine that can achieve the desired results.

[0006]

[Means for Solving the Problems] The rotor structure of a rotating electric machine according to the present invention includes a spacer piece inserted between each concentric field winding, and a spacer piece that communicates between each of the concentric field windings. A guide protrusion is provided to form a gap between each bind.

[0007]

[Operation] The spacing pieces of the concentric field winding in this invention are
to allow cooling air to flow between each concentric field winding into which a spacer is inserted, through each bind separated by a guide protrusion, while allowing the spacer to be fixed to the concentric field winding; It improves the cooling efficiency of the concentric field windings and suppresses the temperature rise of the entire rotor.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a concentrically wound field winding, 2 is a rotor core around which the concentrically wound field winding 1 is wound, and 3 is a concentrically wound field winding 1 punched in the rotor core 2. The rotor slots 4a, 4b, 4c, and 4d are for fixing the concentric field winding 1 as shown in FIG. inserted spacing piece,
6 is a filler for filling the gap between the spacer piece 5 and the concentrically wound field winding 1; 7 is a tape for fixing the spacer piece 5 and the filler 6 to the concentrically wound field winding 1; 8 is a ventilation hole provided at the coil end of the concentric field winding 1. Further, the spacer piece 5 has a block shape as a whole as shown in FIG.
The ventilation hole 8, which is a gap of a predetermined size, is interposed between the holes d and d. Therefore, through each of these ventilation holes 8, the sides of each of the adjacent concentric field windings 1 can come into contact with the cooling air, which is the outside air.

Next, the operation will be explained. The concentric field winding 1 is housed in a rotor slot 3 provided in a rotor core 2. After insertion, rectangular parallelepiped spacing pieces 5 are inserted between the coil end coils of the concentrically wound field windings 1 in order to prevent these concentrically wound field windings 1 from being deformed in the parallel direction. When inserting the spacing piece 5, a filler 6 is inserted together with the spacing piece 5 in order to fill the gap generated between the spacing piece 5 and the concentrically wound field winding 1. The spacing piece 5 and the padding 6 are fixed to the concentric field winding 1 by means of a fixing tape 7. Binds 4a, 4b, 4c, and 4d are wound around the coil end portions of the concentrically wound field winding 1 to prevent the coil end portions from being deformed and the spacing pieces 5 from falling off due to centrifugal force during rotation. Moreover, such bindings 4a, 4b, 4c, 4
When winding d, each bind 4a, 4b, 4c, 4d is wound at intervals so as to form a ventilation hole 8 for flowing cooling air to the coil end portion of the concentrically wound field winding 1. . In this case, the taping work for fixing the spacer piece 5 to the concentric field winding 1 is as follows:
By applying tape 7 to the upper surface of the spacing piece 5 excluding the guide protrusion 9, fixing becomes possible, and the binding 4a,
4b, 4c, and 4d are wound along the upper surface of the spacing piece 5 so that each guide protrusion 9 is interposed, so that each concentric field winding 1 is wound with the exception of a small portion where the spacing piece 5 is interposed. At least a side surface of the housing contacts the outside air through the ventilation holes 8. As a result, the cooling of these concentric field windings 1 becomes more efficient, and burnout accidents and insulation defects can be effectively avoided.

0010

[Effects of the Invention] As described above, according to the present invention, on the spacer piece inserted between each concentric field winding, a gap communicating between each concentric field winding is provided between each bind. Since the configuration includes a guide protrusion for forming the spacer, it is possible to fix the spacer piece to the concentric field winding in the same way as before, and even if the coil end is bound, the spacer piece insertion part cannot be fixed. Ventilation holes can be provided for cooling air to flow through the field windings, which improves the cooling effect of the field windings.In addition, by reducing the temperature rise of the entire rotor, the rotor and the entire rotating machine can be made smaller. It has the effect of obtaining what can be converted.

[Brief explanation of drawings]

FIG. 1 is a plan view of essential parts showing a rotor structure of a rotating electric machine according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG. 1.

FIG. 3 is a perspective view showing a spacing piece in the present invention.

FIG. 4 is a partial plan view showing a rotor structure of a conventional rotating electric machine.

5 is a sectional view taken along line BB in FIG. 4. FIG.

FIG. 6 is a perspective view showing a conventional spacing piece.

[Explanation of symbols]

1 Concentric field winding 3 Rotor slot 4a Bind 4b Bind 4c Bind 4d Bind 5 Spacing piece 7 Tape 8 Gap 9 Guide protrusion

Claims (1)

[Claims] 1. A plurality of concentrically wound field windings partially housed in rotor slots, a spacer piece inserted between the concentrically wound field windings, and a spacer piece inserted between the concentrically wound field windings. In a rotor structure of a rotating electric machine, the rotor structure of a rotating electric machine includes a tape fixed to a winding, and a plurality of binds fixing each of the concentric field windings to each other, in part through the tape, wherein the spacer piece includes: A rotor structure for a rotating electrical machine, characterized in that a guide protrusion is provided that protrudes to form a gap between the binds and communicates the gap between the concentric field windings.