JPH0690539A - Stator for generator - Google Patents

Abstract

PURPOSE:To reduce assembling man-hour and make cost inexpensive by a method wherein the number of sheets of insulating paper, inserted between the coil end of an output winding for DC load and the coil end of an output winding for AC load, is reduced. CONSTITUTION:One side coil ends Ed1, Ed1' of output windings Wd, Wd' for DC load are tilted integrally into the same direction and are superposed on the coil end Ea1' of an output winding WA' for an AC load through insulating paper. The other coil ends Ed2, Ed2' of the output windings Wd, Wd' for a DC load are tilted integrally into a direction opposite to the tilted direction of the coil ends Ed1, Ed1' of the output windings for the DC load and are superposed on the output winding WA for the AC load through the insulating paper.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art In an AC generator having an AC load output winding and a DC load output winding, the AC load output winding and the DC load output winding are wound in different slots. Both output windings are electrically separated. Also, by splitting each coil end of both output windings into two and tilting them to the opposite side, they are aligned with each axial end face of the stator core,
Insulation paper is inserted between the adjacent coil ends of the AC load output winding and the DC load output winding to strengthen the insulation.

4 to 6 show a stator used in a conventional capacitor excitation type generator. FIG. 4 is a front view, FIG. 5 is a bottom view, and FIG. 6 is a rear view. A winding diagram of this stator is shown in FIG.

In these figures, Cs is 32 on the inner peripheral side.
An annular stator core having individual slots S at equal angular intervals, and this stator core is fitted to the inner circumference of a cylindrical yoke fitting Y. In FIGS. 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 open to the inner diameter side of the stator core through a slit long in the axial direction, but the slit is not shown.

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

The slots (4, 29), (5, 2)
Winding W on 8), (6, 27) and (7, 26) respectively
a is wound, and these winding groups form a first AC load output winding WA. Further slots (13,
20), (12,21), (11,22) and (10,
23) is wound with a winding Wa ', and these winding groups constitute a second AC load output winding WA' paired with the first AC load output winding and forming a pair. The AC load output windings WA and WA 'are connected in series.

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

In the above stator, a pair of AC load output windings W protruding from each axial end of the stator core Cs.
One of the coil ends Ea1 and Ea1 ′ of A and WA ′ is in a state where the coil ends Ea1 and Ea1 ′ are tilted in directions opposite to each other (symmetrically), and the stator core C
The other coil end Ea of the pair of AC load output windings WA and WA 'is arranged along one axial end surface of s.
2, Ea2 'are arranged along the other axial end face of the stator core Cs in a state of being tilted in opposite directions. Also, one of the coil ends Ed1 and Ed1 'of the DC load output windings Wd and Wd' is tilted in the opposite directions so that one of the coil ends Ea1 and Ea1 'of the AC load output windings WA, WA' is placed. And the other coil ends Ed2 and Ed2 'of the DC load output windings Wd and Wd'.
Are laid in opposite directions 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 ends as shown in FIG. 8 is inserted to reinforce the 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', the capacitor exciting windings Wc and Wc ', and the yoke Y are used as a stator. ST is configured. As shown in FIG. 9, inside the stator ST, a field winding Wf is wound around a two-pole rotor core Cr, and a diode Df is connected to both ends of the field winding. The RT is arranged, and the 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, the AC load La is connected via the switch SW1 to the AC load output windings WA and WA 'connected in series, and the DC load output windings Wd and Wd' are connected in parallel. A DC load Ld is connected to this via a rectifier Rec and a switch SW2.

In the example shown in FIG. 9, the DC load output windings Wd and Wd 'are connected in parallel, but as shown in FIG. 10, these output windings Wd and Wd' are connected in series. In some cases, the output tap and the diodes D1 and D2 form 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 stator for a generator, a DC load output winding W is symmetrically distributed and wound.
The coil ends Ea1 and Ea2 of the AC load output winding WA are arranged because the coil ends of d and Wd 'are laid in the opposite directions and overlapped on the coil end of the AC load output winding via the insulating paper. Each and output winding W for DC load
between the coil ends Ed1 and Ed2 of d and the coil ends Ea1 'and Ea2 of the output winding WA' for AC load.
'And the coil end Ed1' of the DC load output winding Wd ',
Insulation paper had to be inserted at a total of four places between Ed2 ', which was very troublesome.

Further, in the conventional stator, since the coil ends of the DC load output windings Wd and Wd 'are tilted in the opposite directions and overlapped on the AC load output winding, the respective outputs are output. When the wires connected to the ends of the winding and the excitation winding are bundled and led out to the outside 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 stator for a generator in which the number of places where an insulating paper is inserted can be reduced and the cost can be reduced.

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 portion in the axial direction and can be downsized.

[0016]

According to the present invention, an annular stator core having a large number of slots, a pair of DC load output windings symmetrically distributed around the slots of the stator core, and fixed. The present invention relates to a stator for a generator having a pair of AC load output windings symmetrically distributed and wound in slots other than slots in which a DC load output winding of a child core is wound.

In the present invention, the coil ends of the pair of AC load output windings projecting from the respective axial end portions of the stator core are tilted in the 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 tilted together in the same direction, and is superposed on the coil ends of the AC load output windings with insulating paper interposed therebetween. The other coil end of the DC load output winding is placed on the AC load output winding in a direction opposite to the one of the DC load output windings. Overlaid with insulating paper.

[0019]

With the above-mentioned structure, the insulating paper for reinforcing the insulation of the coil ends is provided between one coil end of the pair of DC load output windings and one coil end of the AC load output windings. And the pair of DC load output windings and the other end of the AC load output winding and the coil end of the other AC load output winding only need to be inserted in two places. It is possible to reduce the cost by cutting the number of insertion steps in half. Also, as mentioned above, if the coil ends of the DC load output winding are tilted to one side at a time,
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, the wire harness can be arranged using the space. Therefore, the protruding 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 directions different from each other, magnetic imbalance can be prevented from occurring, so that the conventional stator can be prevented. The same performance as can be obtained.

[0021]

1 to 3 show an embodiment of the present invention. In these figures, Cs is an annular stator iron core having 32 slots S on the inner circumference side at equal angular intervals, and this stator iron core is fitted to 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. 2, the output windings Wd, Wd for the pair of DC loads
, And a pair of AC load output windings WA and WA 'consisting of winding groups Wa, Wa, ... And Wa', Wa ', ..., And a capacitor excitation winding (not shown in FIGS. 1 to 3). .) And are 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 laid down in the opposite direction. It is arranged along one of the axial end faces. Also, a pair of AC load output windings WA, W projecting from the other axial end of the stator core Cs.
The other coil ends Ea2, Ea2 'of A'are also arranged along the other axial end face of the stator core in a state of being tilted in the opposite directions. These configurations are similar to the conventional ones.

In this embodiment, the coil ends Ed1 and Ed2 of one output winding Wd of the pair of DC load output windings Wd and Wd 'have the inner diameter of the other output winding Wd' of each coil. It is set to be slightly larger than the outer diameter of the ends Ed1 'and Ed2'. And a pair of DC output windings Wd and Wd '
One of the coil ends Ed1 and Ed1 'is laid down together in the same direction and is stacked 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 one of the DC load output windings Ed1 and Ed1' is tilted. Is overlaid on the coil end Ea2 of the AC load output winding WA with insulating paper.

The end portions of the output windings and the capacitor excitation windings are led out onto the coil end Ea1 at one end of the AC load output winding WA, and the electric wires connected to the respective end portions are connected to the wire harness H. Is outsourced to. In this case, the end portion of the wire harness H has an output winding W for DC load.
Since the wire harness is arranged in the space formed on the side of the coil end of Wd ′, the protruding length of the wire harness from the stator can be shortened, and the stator can be miniaturized.

With the above construction, the insulating paper is inserted in the coil ends Ed1, Ed1 'of the DC load output windings Wd, Wd' and the AC load output winding WA 'coil end Ea1'. And the output winding Wd for DC load,
Since the coil ends Ed2, Ed2 'of Wd' and the coil end Ea2 of the AC load output winding WA can be provided in two places in total, the number of insulating papers and the man-hours required for inserting the insulating papers are halved. Can be made.

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

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

Although the pair of AC load output windings WA and WA 'are connected in series in the above embodiment, 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 provided with one coil end of the pair of DC load output windings and one of the AC load output windings. Since it is necessary to insert it only between the coil end of the wire and the other coil end of the pair of DC load output windings and the coil end of the other AC load output winding, the insulating paper It is possible to reduce the cost 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 DC load output winding are collectively tilted to one side so that the coil end of the DC load output winding corresponds to the thickness of the coil end. Since the space is formed, the wire harness can be arranged using the space. Therefore, the protruding 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, magnetic imbalance can be prevented from occurring and the generator There is an advantage that the size can be reduced and the cost can be reduced without any loss of performance.

[Brief description of 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 stator for a generator.

FIG. 5 is a bottom view of FIG.

FIG. 6 is a rear view of FIG.

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

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

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

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

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

[Explanation of symbols]

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

Claims (1)

[Claims] 1. An annular stator core having a large number of slots, a DC load output winding symmetrically distributed around a predetermined slot of the stator core, and the DC load of the stator core. A pair of alternating-current load output windings symmetrically distributed and wound in slots other than the slots in which the output windings are wound, wherein each axial end of the stator core is The coil ends of the pair of AC load output windings protruding from the portion are arranged along the respective axial end faces of the stator core in a state of being tilted in mutually opposite directions, and the pair of DC One coil end of the load output winding is laid down in the same direction at a time and stacked on the coil end of the AC load output winding with insulating paper interposed therebetween, and the pair of DC load output windings The other coil end of
The coil ends of the DC load output windings are collectively tilted in a direction opposite to a direction in which the one coil end is tilted, and are overlaid on the AC load output windings with insulating paper. Stator for generator characterized by.