JP2884939B2 - Stator for generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator for a generator having an output winding for an AC load connected to an AC load and an output winding for a DC load connected to a DC load via a rectifier. Things.

[0002]

2. Description of the Related Art In an AC generator having an output winding for an AC load and an output winding for a DC load, the output winding for the AC load and the output winding for the DC load are wound in different slots. Thus, both output windings are electrically separated. Also, by dividing each coil end of both output windings into two parts and laying them on opposite sides, the respective ends are arranged along the respective axial end faces of the stator core,
Insulation paper is inserted between adjacent coil ends of the output winding for AC load and the output winding for DC load to enhance insulation.

FIGS. 4 to 6 show a stator used in a conventional capacitor-excited generator. FIG. 4 is a front view, FIG. 5 is a bottom view, and FIG. 6 is a rear view. FIG. 7 shows a winding diagram of the stator.

[0004] In these figures, Cs is 32 on the inner peripheral side.
An annular stator core having slots S at equal angular intervals. The stator core is fitted on the inner periphery of a cylindrical yoke Y. 4 and 6, the chain line extending in the radial direction indicates the center of the boundary between the slots, and the numbers 1 to 32 indicate the slot numbers. Windings are wound around these slots according to the winding diagram of FIG. Each slot is opened to the inner diameter side of the stator core through a slit that is long in the axial direction, but the illustration of the slit is omitted.

In this example, a predetermined number of turns of a winding conductor is inserted into the slots 8 and 25 to wind the first DC load output winding Wd, and the slots 9 and 24 have a predetermined number of turns. The conductor is inserted into the second DC load output winding W
d 'is wound. The first and second DC load output windings are connected in parallel with each other.

The slots (4, 29), (5, 2)
8), (6, 27) and (7, 26)
a is wound and these winding groups constitute a first AC load output winding WA. Further, the slot (13,
20), (12, 21), (11, 22) and (10,
A winding Wa 'is wound around 23), and a group of these windings constitutes a second AC load output winding WA' paired with the first AC load output winding and forms a pair. The AC load output windings WA and WA 'are connected in series.

Although not shown in FIGS. 4 and 6, a first capacitor excitation winding Wc is wound around the slots (2, 15) and (3, 14), and the slots (18, 31) and A second capacitor excitation winding Wc 'is wound around (19, 30), and both capacitor excitation windings are connected in series.

In the above-described stator, a pair of AC load output windings W protruding from each axial end of the stator core Cs.
A, WA ', one of the coil ends Ea1, Ea1' are folded in opposite directions (symmetrically) and the stator core C
s, and the other coil end Ea of the pair of AC load output windings WA, WA '.
2, Ea2 'are arranged along the other axial end face of the stator core Cs in a state where they are tilted in opposite directions. Also, one coil ends Ed1 and Ed1 'of the DC load output windings Wd and Wd' are tilted in opposite directions to each other, and are placed above one of the coil ends Ea1 and Ea1 'of the AC load output windings WA and WA'. And the other coil ends Ed2 and Ed2 'of the DC load output windings Wd and Wd'.
Are folded in the opposite directions to each other, and are superimposed on the other coil ends Ea2 and Ea2 'of the pair of AC load output windings WA and WA'. Between each coil end of the output winding for DC load and each coil end of the output winding for AC load,
At least one arc-shaped insulating paper P corresponding to the shape of the coil end as shown in FIG. 8 is inserted to reinforce insulation between the coil ends of both output windings.

The stator core Cs, the AC load output windings WA and WA ', the DC load output windings Wd and Wd' and the capacitor exciting windings Wc and Wc ', and the yoke Y are used for the stator. ST is configured. Inside the stator ST, a field winding Wf is wound around a two-pole rotor core Cr as shown in FIG. 9, and a diode Df is connected to both ends of the field winding. An RT is arranged, and a capacitor C1 is connected to both ends of the capacitor exciting windings Wc and Wc 'connected in series. The stator ST and the rotor RT constitute a capacitor excitation type generator.

In this example, an AC load La is connected to the AC load output windings WA and WA 'connected in series via a switch SW1, and the DC load output windings Wd and Wd' are connected in parallel. Is connected to a DC load Ld via a rectifier Rec and a switch SW2.

In the example shown in FIG. 9, the output windings Wd and Wd 'for DC load are connected in parallel, but as shown in FIG. 10, these output windings Wd and Wd' are connected in series. In some cases, both output windings and the diodes D1 and D2 constitute a center tap type full-wave rectifier circuit. Further, as shown in FIG. 11, a load may be connected to the DC load output windings Wd and Wd 'connected in series via a full-wave rectifier Rec.

[0012]

In a conventional generator stator, a DC load output winding W which is symmetrically distributed and wound.
Since the coil ends d and Wd 'are tilted in the opposite directions to each other and are superimposed on the coil end of the output winding for AC load via insulating paper, the coil ends Ea1 and Ea2 of the output winding WA for AC load are interposed. And the output winding W for the DC load
d between the coil ends Ed1 and Ed2, and the coil ends Ea1 'and Ea2 of the AC load output winding WA'.
′ And the coil ends Ed1 ′ of the DC load output winding Wd ′,
Insulating paper had to be inserted at a total of four places between the two and Ed2 ', which was very troublesome.

In the conventional stator, the coil ends of the DC load output windings Wd and Wd 'are tilted in opposite directions to each other, and are stacked on the coil end of the AC load output winding. When bundling the wires connected to the terminals of the winding and the exciting winding and leading them out as a wire harness, the axial length of the stator becomes longer by the amount of the wire harness, and the generator becomes larger. There was a problem.

An object of the present invention is to provide a generator stator in which the number of places where insulating paper is inserted is reduced to reduce the cost.

Another object of the present invention is to provide a stator for a generator which can secure a space for arranging a wire harness at an end in an axial direction and can be downsized.

[0016]

SUMMARY OF THE INVENTION The present invention provides an annular stator core having a number of slots, a pair of DC load output windings symmetrically distributed around the slots of the stator core, and a fixed stator. The present invention relates to a stator for a generator having a pair of AC load output windings symmetrically distributed and wound around slots other than the slots in which the DC load output windings of the child core are wound.

In the present invention, each coil end of a pair of AC load output windings projecting from each axial end of the stator core is tilted in opposite directions to each other in the axial direction of the stator core. Place along the end face.

On the other hand, one of the coil ends of the pair of DC load output windings is collectively tilted in the same direction and overlapped on the coil end of the AC load output winding via insulating paper. The other coil end of the DC load output winding is tilted collectively in the direction opposite to the direction in which the one coil end of the DC load output winding is tilted, and the other coil end is placed above the AC load output winding. Over insulating paper.

[0019]

With the above construction, the insulating paper for reinforcing the insulation of the coil ends is provided between the one coil end of the pair of DC load output windings and the coil end of the one AC load output winding. Between the coil ends of the pair of DC load output windings and between the other coil end of the AC load output windings. The number of insertion steps can be reduced by half, and the cost can be reduced. Also, as described above, when the coil ends of the DC load output winding are collectively turned to one side,
Since a space corresponding to the thickness of the coil end is formed on the side of the coil end of the DC load output winding, a wire harness can be arranged using the space. Therefore, the protrusion length of the wire harness from the stator can be shortened, and the size of the stator can be reduced.

Further, as described above, when the coil ends at both ends of the DC load output winding are tilted in different directions from each other, it is possible to prevent magnetic imbalance from occurring. The same performance can be obtained.

[0021]

1 to 3 show an embodiment of the present invention. In these figures, Cs is an annular stator core having 32 slots S on the inner circumference side at equal angular intervals, and this stator core is fitted on the inner circumference of a cylindrical yoke fitting Y. . The slots 1 to 32 of the stator core are shown in FIG.
According to the winding diagram of FIG.
, A pair of windings Wa, Wa,... And a pair of AC load output windings WA, WA ′,..., And a capacitor excitation winding (not shown in FIGS. 1 to 3). ) Is wound. One of the coil ends Ea1, Ea1 'of the pair of AC load output windings WA, WA' projecting from one axial end of the stator core Cs is tilted in opposite directions to each other. Are arranged along one end face in the axial direction. A pair of AC load output windings WA and W projecting from the other axial end of the stator core Cs.
The other coil ends Ea2 and Ea2 'of A' are also disposed along the other axial end face of the stator core in a state where they are tilted in opposite directions. These configurations are the same as the conventional one.

In this embodiment, the inner diameter of each of the coil ends Ed1 and Ed2 of one output winding Wd of the pair of DC load output windings Wd and Wd 'is the same as that of the other output winding Wd'. It is set slightly larger than the outer diameters of the ends Ed1 'and Ed2'. And a pair of DC output windings Wd and Wd '
, One of the coil ends Ed1 and Ed1 'are tilted collectively in the same direction, and overlaid on the coil end Ea1' of the AC load output winding WA 'via an insulating paper (not shown),
The other coil ends Ed2 and Ed2 'of the pair of DC load output windings are collectively tilted in a direction opposite to the direction in which the one coil ends Ed1 and Ed1' of the DC load output windings are tilted. Over the coil end Ea2 of the AC load output winding WA via insulating paper.

The terminal of each output winding and the capacitor excitation winding is led out onto the coil end Ea1 on one end of the AC load output winding WA, and the electric wire connected to each terminal is connected to the wire harness H. Is derived outside. In this case, the end of the wire harness H is connected to the output winding W for the DC load.
Since the wire harness is disposed in the space formed on the side of the coil end of d, Wd ', the length of the wire harness protruding from the stator can be shortened, and the size of the stator can be reduced.

With the above construction, the insulating paper is inserted into the coil ends Ed1 and Ed1 'of the DC load output windings Wd and Wd' and the coil end Ea1 'of the AC load output winding WA'. And the output winding Wd for DC load,
Since only two places are required between the coil ends Ed2 and Ed2 'of the Wd' and the coil end Ea2 of the output winding WA for the AC load, the number of insulating papers and the man-hour required for inserting the insulating papers are reduced by half. Can be done.

In the above embodiment, the stator used for the capacitor-excited AC generator is taken as an example. However, the output winding for the AC load, the output winding for the DC load, and the excitation winding are arranged on the stator side. The present invention is also applicable to a stator of an AC generator with a voltage regulator of a type that supplies a field current from the excitation winding of the stator to the field winding of the rotor through a voltage adjustment circuit. it can. The present invention can also be applied to a stator of a generator (for example, a generator having an exciter separately) in which only an output winding for an AC load and an output winding for a DC load are wound around a stator core.

In the above embodiment, a stator having 32 slots is taken as an example. However, the number of slots is arbitrary in the present invention.

In the above embodiment, the pair of output windings WA and WA 'for AC load are connected in series. However, these output windings WA and WA' may be connected in parallel.

[0028]

As described above, according to the present invention, the insulating paper for reinforcing the insulation of the coil ends is formed by combining one coil end of the pair of DC load output windings and one AC load output winding. Because it is sufficient to insert the wire between the coil end of the wire and the two ends of the pair of output windings for DC load and the coil end of the other output winding for AC load, insulating paper There is an advantage that the cost can be reduced by halving the number of steps and the number of steps for inserting the insulating paper.

Further, according to the present invention, the coil ends of the output windings for DC load are collectively turned to one side, so that the thickness of the coil ends is on the side of the coil ends of the output winding for DC load. Since the space is formed, the wire harness can be arranged using the space. Therefore, the protrusion length of the wire harness from the stator can be shortened, and the size of the stator can be reduced.

Further, according to the present invention, since the coil ends at both ends of the DC load output winding are tilted in different directions from each other, it is possible to prevent the occurrence of magnetic imbalance and to reduce the power generation of the generator. There is an advantage that the size can be reduced and the cost can be reduced without impairing any performance.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a bottom view of FIG.

FIG. 3 is a rear view of FIG. 1;

FIG. 4 is a front view of a conventional generator stator.

FIG. 5 is a bottom view of FIG. 4;

FIG. 6 is a rear view of FIG. 4;

FIG. 7 is a winding diagram showing a winding configuration of a stator according to an embodiment of the present invention and a conventional stator.

FIG. 8 is a front view showing an example of insulating paper inserted between the coil end of the output winding for AC load and the coil end of the output winding for DC load.

FIG. 9 is a circuit diagram showing an example of an electrical configuration of a generator using the stator according to the embodiment of the present invention.

FIG. 10 is a circuit diagram showing an example of how to use a DC load output winding.

FIG. 11 is a circuit diagram showing another example of how to use the DC load output winding.

[Explanation of symbols]

Cs Stator core WA, WA 'AC load output winding Wd, Wd' DC load output winding Ea1, Ea1 ', Ea2, Ea2' AC load output winding coil end Ed1, Ed1 ', Ed2, Ed2 ´ Coil end of output winding for DC load

Claims (1)

(57) [Claims] 1. An annular stator core having a number of slots, a DC load output winding wound around a predetermined slot of the stator core in a symmetrical manner, and the DC load of the stator core. And a pair of output windings for AC load wound symmetrically to slots other than the slot in which the output winding is wound, wherein each of the stator cores has an axial end. The coil ends of the pair of AC load output windings protruding from the portion are disposed along the respective axial end faces of the stator core in a state where they are tilted in opposite directions, and One of the coil ends of the load output winding is collectively tilted in the same direction and is stacked on the coil end of the AC load output winding via insulating paper, and the pair of DC load output windings The other coil end of
The one end of the DC load output winding is tilted collectively in a direction opposite to the direction in which the one coil end is tilted, and is stacked on the AC load output winding via insulating paper. A generator stator.