JPH06189514A - Synchronous generator for engine generator - Google Patents

Abstract

PURPOSE:To facilitate the winding and connection work by making the winding for detection independent of the output winding without deteriorating performance. CONSTITUTION:In a synchronous generator for an engine generator, in which the output winding is wound with a plurality of coils as one conductor, and the detection winding doubles as one part of the output winding and the output voltage of the output winding is made constant with the detection voltage extracted with the detection winding, the output winding of the detection winding 2 is made a separate winding, and also the detection winding 2 is wound with one conductor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synchronous generator for an engine generator, and particularly to an armature winding having a structure in which a plurality of coils are wound in parallel as one conductor. Is a separate winding, and the detection winding is related to a synchronous generator for engine generator in which one coil is wound as one conductor.

[0002]

2. Description of the Related Art In an engine-driven synchronous generator, a conductor wound around a slot when the output capacity is large is wound in parallel with a plurality of coils as one conductor. For example, in FIG.
Described in.

FIG. 12 shows a conventional armature winding diagram, in which the output winding is wound around the positions of slots 1 to 18 and winding A is located at the positions of slots 19 to 36. It comprises a winding B and three windings C wound around the slots 1 to 18. The output is obtained by connecting windings A, B, and C in series, and from the terminal.

The winding C is a detection winding for supplying a detection voltage to the automatic voltage regulator and constitutes a part of the output winding. In order to make the voltage waveform output from the output terminal symmetrical, the winding number distribution of the windings A and C combined is the same as the winding number distribution of the winding B. .

The required cross-sectional area per conductor of the output winding is determined by the magnitude of its output current. For example, the rated voltage 1 in FIG.
In the case of a large current of 00V and rated current of 60A, there is also a problem of space factor. One conductor inserted in each slot is composed of nine coils with a diameter of 1.0Φ. The number of conductors is wound in parallel in each slot.

[0006]

In the conventional armature winding configuration in which a part of the voltage is extracted from the output winding and is used as the detection voltage for the automatic voltage regulator, the winding shown in FIG. C
Also, since nine coils with a diameter of 1.0Φ are wound as one conductor, the number of connections, such as the connection between the winding B and the winding C when extracting as a detection voltage, is large, and the connection work efficiency is poor. Also, since the winding C constitutes a part of the output winding, there are many restrictions, and there is a drawback that simplification of the detection winding, for example, a single slot concentrated winding cannot be considered.

Furthermore, if the diameter and product thickness of the generator are the same, that is, if the length is the same, the detected voltage, regardless of the voltage specification,
In other words, all the detection windings should be the same, but since they form part of the output winding, the coil diameter, the number of constituent coils of one conductor, the winding distribution, etc. will vary, and the integration,
There was a drawback that it was difficult to standardize.

The above-mentioned drawbacks become more serious as the voltage generated per conductor is higher, that is, the diameter of the generator is large and the product thickness is long, and the low-voltage specification is used. An object of the present invention is to solve the above-mentioned drawbacks and to enable the detection windings to be integrated even if the voltage specifications are different, and to improve the work efficiency of connecting the output windings and the detection windings. The purpose is to provide a synchronous generator for use.

[0009]

In order to achieve the above object, in the synchronous generator for engine generator of the present invention, the output winding is wound with a plurality of coils as one conductor, and the detection winding is In a synchronous generator for an engine generator, which also serves as a part of the output winding and which makes the output voltage of the output winding a constant voltage by the detection voltage extracted by the detection winding, the detection winding is separate from the output winding. And the detection winding has one coil
It is characterized by being wound as a conductor.

The detection winding may be distributed winding or concentrated winding. When the detection winding is distributedly wound, it is wound in a slot at an electrical angle of 10 ° to 50 ° behind the output winding, and when the detection winding is concentratedly wound,
It is wound in a slot that is delayed by 25 ° to 60 ° in electrical angle.

[0011]

1 shows a winding diagram of an armature winding according to an embodiment of the present invention. Reference numeral 1 is an output winding, and 2 is a detection winding. The output winding 1 is similar to the windings A, B and C in FIG. 12 in that one conductor is composed of nine 1.0Φ coils, and the windings A, B and C are connected in series. Is the same as

However, in FIG. 1, the detection winding 2 is separate from the output winding 1. The detection winding 2 constitutes one conductor with one coil, and for example, a coil of 0.5Φ is now wound.

2 and 3 show winding diagrams of armature windings according to another embodiment of the present invention. 2 and 3 are the same as those in FIG. 1 except that the detection windings 3 and 4 as separate windings are different from each other in the insertion slot positions of the detection winding 1 in FIG.

FIGS. 4 and 5 show performance comparisons of the armatures of the winding diagrams shown in FIGS. 1 to 3 and FIG. 12 using the same actual machine. Figure 4 is a load characteristic comparison diagram.
(1), (2), (3) and (12) shown in FIG.
It refers to the armature winding according to the winding diagrams of FIGS. 2, 3 and 12.

FIG. 5 is a comparison diagram of the voltage fluctuation rate and the waveform distortion rate.
Similar to the case of FIG. 4, (1), (2), (3), and (12) refer to the armature winding according to the winding diagrams of FIGS. 1, 2, 3, and 12.

As can be seen from FIGS. 4 and 5, the armature winding according to the winding diagram of FIG. 3 has the same performance as that of the conventional armature winding according to the winding diagram of FIG. It shows that the detection winding 4 can be a separate winding independent of the output winding 1.

FIG. 6 shows a winding diagram of another embodiment of the present invention in which the detection winding is distributedly wound with a delay of 40 °. In the figure, 11 is an output winding and 12 is a distributed winding detection winding. The rated output of the armature winding around which the output winding 11 shown in the figure is wound is 3.6 kW, and the generator has a rated voltage of 120V.

FIG. 7 shows a winding diagram of another embodiment of the present invention in which the detection winding is concentratedly wound with a delay of 40 °. In the figure, 11 is the same as that of FIG. 6, and 13 is a detection winding which is concentratedly wound. That is, in FIG. 6 and FIG. 7, one of the detection windings is distributed winding and the other is concentrated winding, and all the windings are the same. The load characteristic diagrams at this time are shown in FIG. 8 and FIG.
Is shown in.

Next, referring to FIG. 6, the insertion position of the distributed winding detection winding 12 with respect to the output winding 11 is 1 electrical angle from the same phase.
FIG. 10 shows a change in the voltage fluctuation rate when the delay is 0 °, that is, every 1 slot.

From FIG. 10, the voltage fluctuation rate under the optimum condition is 5%.
The following is the case where the delay electrical angle of the detection winding 12 is 10 °.
It shows that the position of ˜50 °, that is, the number of delay slots of the detection winding 12 is 1 to 5.

In FIG. 7, the insertion position of the concentrated winding detection winding 13 with respect to the output winding 11 is 1 electrical angle from the same phase.
FIG. 11 shows a change in the voltage fluctuation rate when the delay is 0 °, that is, every slot is delayed.

From FIG. 11, the voltage fluctuation rate under the optimum condition is 5%.
The reason for the following is that the delay electrical angle of the detection winding 13 is 25 °.
This shows that the position of -60 °, that is, the number of delay slots of the detection winding 13 is between 2 and 3 or 6.

The difference in the lagging electrical angles of the detection windings 12 and 13 in which the voltage fluctuation rate of both is less than 5% is based on the fact that the influence of the armature reaction is different between the distributed winding and the concentrated winding. .

From the above experimental results of the actual machine, when the detection winding is formed separately from the output winding, the load characteristics are improved by delaying the detection winding to a certain degree rather than making the detection winding in phase with the output winding. The distributed winding has a voltage fluctuation rate of 5% or less at a position delayed by 10 ° to 50 °, and the concentrated winding has a voltage fluctuation rate of 5% or less at a position delayed by 25 ° to 60 °. That is, regardless of the winding method of the detection winding, the position delayed by 30 ° to 50 ° is optimal in terms of performance.

In the experiment, an armature with 36 slots was used. However, even if the number of slots is different, if the detection winding is wound at a position corresponding to the same electrical angle, it is clear that the same effect as above can be obtained. is there.

When a drooping characteristic corresponding to (1) or (2) in FIG. 4 is required, the insertion position of the detection winding is set to 1 or 2 as shown in FIGS. The desired characteristics can be obtained simply by shifting the number of slots.

[0027]

As described above, according to the present invention, by winding the detection winding separately from the output winding, the winding work and the connection work are made efficient, and the detection winding is the output winding. Since it is not affected by the above, various requirements can be easily answered and it becomes easy to integrate and standardize the models.

Since only the winding is changed, the conventional automatic voltage regulator can be used as it is.

[Brief description of drawings]

FIG. 1 is a winding diagram of an armature winding according to an embodiment of the present invention.

FIG. 2 is a winding diagram of an armature winding according to another embodiment of the present invention.

FIG. 3 is a winding diagram of an armature winding according to another embodiment of the present invention.

FIG. 4 is a load characteristic comparison diagram.

FIG. 5 is a comparison diagram of a voltage variation rate and a waveform distortion rate.

FIG. 6 is a winding diagram of another embodiment of the present invention in which the detection winding is distributedly wound with a delay of 40 °.

FIG. 7 is a winding diagram of another embodiment of the present invention in which the detection winding is concentratedly wound with a delay of 40 °.

FIG. 8 is a load characteristic diagram of the winding of FIG.

9 is a load characteristic diagram of the winding of FIG. 7. FIG.

FIG. 10 is a voltage fluctuation rate curve diagram with respect to a delay electrical angle of the distributed winding detection winding.

FIG. 11 is a voltage fluctuation rate curve diagram with respect to a delay electrical angle of the concentrated winding detection winding.

FIG. 12 is a winding diagram of a conventional armature winding.

[Explanation of symbols] 1 output winding 2, 3, 4 detection winding 11 output winding 12, 13 detection winding

Claims (5)

[Claims] 1. An output winding is wound with a plurality of coils as one conductor, the detection winding also serves as a part of the output winding, and the output voltage of the output winding is detected by the detection voltage extracted by the detection winding. In a synchronous generator for an engine generator that makes a constant voltage, the detection winding is formed separately from the output winding, and the detection winding is wound with one coil as one conductor. Synchronous generator for engine generator. 2. The synchronous generator for engine generator according to claim 1, wherein the detection winding is distributed winding. 3. The synchronous power generation for an engine generator according to claim 2, wherein the distributed winding of the detection winding is wound at a position delayed by an electrical angle of 10 ° to 50 ° with respect to the output winding. Machine. 4. The synchronous generator for engine generator according to claim 1, wherein the detection winding is concentratedly wound. 5. The synchronous generator for engine generator according to claim 4, wherein the concentrated winding of the detection winding is wound at a position delayed by 25 ° to 60 ° in electrical angle with respect to the output winding. Machine.