JPS61128753A - Brushless self-excited generator - Google Patents

Abstract

PURPOSE:To miniaturize coils lightening the weight, by winding up an excitor field coil and a generating coil to generate magnetic poles multiplied by integral numbers of magnetic poles due to a main field coil. CONSTITUTION:On a brushless self-excited generator, a stator 1 is provided with an excitor field coil 8, a main generating coil 5 and a main excitation generating coil 6, and a rotor 2 is provided with an excitor generating coil 9 and a main field coil 7. Then, a rotating field is generated by the rotation of the rotor 2, and voltage is induced to the main generating coil 5, and the said rotating field is generated by the output of the excitor generating coil 9 fed to the main field coil 7 via a rectifier 11. And the induced voltage of the coil 9 is generated by the excitor field coil 8. Then, the exciting current to the excitor field coil 8 is controlled according to the partial voltage of the output voltage of the main generating coil 5 at a voltage controlling circuit 13, and the output of the main generating coil 5 can be kept constant irrespective of the fluctuation of a load 14.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a brushless self-excited generator, particularly a brushless self-excited generator having an exciter field coil and an exciter generating coil, in which the exciter field coil is This relates to a brushless self-excited generator that is miniaturized by winding the exciter generator coil together with a main generator coil and a main excitation generator coil around a stator, and by winding the exciter generator coil around a rotor together with a main field coil. It is.

(Prior Art and Problems to be Solved by the Invention) Conventionally, brushless self-excited generators (hereinafter referred to as "brushless self-excited generators") as shown in FIGS. 4(A) and CB) have been known.

(abbreviated simply as a generator) is known. In addition.

FIG. 4(A) is a schematic diagram showing the configuration of the main parts of the conventional generator, and FIG. 4(B) is a circuit diagram.

The conventional generator described above has a so-called main generator consisting of a stator 1 around which a main generator coil 5 and a main excitation generator coil 6 are wound, a rotor 2 around which a main field coil 7 is wound, and The exciter stator 3 and the exciter generator coil 9 around which the exciter field coil 8 is wound.
It is constituted by an exciter generator, which is composed of an exciter rotor 4 around which the exciter rotor 4 is wound.

The rotor 2.4 is fixed to the rotating shaft 10, and although not shown in FIG. 4(A), the main field coil 7 and the exciter generating coil 9 are shown in FIG. 4(B). ) as shown in the diagram.

They are connected via a rectifier 11. In addition, Fig. 4 (A
) The illustrated conventional generator is electrically constructed as shown in the illustrated circuit diagram in FIG. 4(B). The operation of the above conventional generator having a configuration as shown in the circuit diagram shown in FIG. 4(B) is generally well known and is basically the same as the generator of the present invention described later, so the operation will not be explained here. Although omitted, the symbols 11 and 12 in FIG. 4(B) represent a rectifier, 13 represents a voltage adjustment circuit, and 14 represent a load, and the other symbols correspond to the symbols in FIG. 4(A). .

In the conventional generator shown in FIGS. 4(A) and 4(B), as mentioned above, the so-called main generator and the excitement generator use the same rotating shaft 10. This involves the undesirable problem that the shaft 10 becomes longer, which not only increases the axial length of the generator but also increases its weight.

(Means for Solving the Problems) The present invention aims to solve the above-mentioned problems, and therefore, the brushless self-excited generator of the present invention has an exciter field coil, an exciter power generation coil, and an exciter field coil. , in a brushless self-excited generator equipped with a main field coil, a main generator coil, and a main excitation generator coil, the exciter field coil, the main generator coil, and the main excitation generator coil are wound around a stator. At the same time, the exciter power generation coil and the main field coil are wound around a rotor, and the exciter field coil generates a magnetic pole that is an integral multiple of the magnetic pole generated by the main field coil. It is characterized in that it is configured to have the same number of magnetic poles as the magnetic poles generated by the exciter field coil. This will be explained below with reference to one drawing.

(Embodiment of the Invention) Fig. 1 is a basic electric circuit diagram of a brushless self-excited generator of the present invention, and Fig. 2 and Fig. 3 (A) to F) are coils in an embodiment of the present invention. An explanatory diagram of a wound state is shown. The symbols in Figure 1 refer to Figures 4 (A) and (B).
It corresponds to

In the brushless self-excited generator (hereinafter simply referred to as a generator) of the present invention, as shown in FIGS. 1 to 3, the exciter field coil 8 is connected to the main generator coil 5 and the main excitation generator coil. 6 is provided in the stator 1, and an exciter generating coil 9 is provided in the rotor 2 together with the main field coil 7. The fact that such a configuration can have performance equivalent to that of the conventional generator described at the beginning of this specification is as follows. Although this can be realized as described later with reference to FIGS. 2 and 3, first, the power generation operation of the generator of the present invention will be described before explaining regarding FIGS. 2 and 3. This will be explained with reference to FIG.

In FIG. 1, a voltage is induced in the main generating coil 5 by the rotating magnetic field generated by the rotation of the first rotor 2. The rotating magnetic field for inducing voltage in the main generating coil 5 is generated in the main field coil It is generated by supplying the output of the exciter power generation coil 9 to 7 via the rectifier 11. The induced voltage in the exciter power generation coil 9 is generated in the main excitation power generation coil 6 which is applied to the stator 1 by the rotating magnetic field, and is generated in the rectifier 12. This is caused by being supplied to the exciter field coil 8, which is also provided in the stator 1, via the voltage adjustment circuit 13. In addition.

The excitation current supplied to the exciter field coil 8 is
In the voltage adjustment circuit 13, the main generating coil 5
By being controlled based on the divided voltage of the output voltage, the output of the main generating coil 5 can be kept constant despite fluctuations in the load 14. Further, the rise of the output voltage at the time of startup can be considered to be due to the residual magnetism in the two rotors 2. As mentioned above, the fact that the generator of the present invention can have performance equivalent to that of the conventional generator is due to the magnetic pole configuration of the rotor 2 as described later in connection with FIGS. 2 and 3. This can be realized by determining the winding mode of each coil.

Below, FIGS. 2 and 3 will be explained.

In the embodiment shown in FIG. 2, . . . . . . . . . . . . . . . . . . . . . . . As shown in the main generator coil 5. Main excitation generator coil 6
and an exciter field coil 8. That is, FIG. 3(A) shows the position of slot ① or [phase],
Figure (B) shows the main generator coil 5. FIG. 3(C) shows the arrangement of the main excitation generator coil 6, and FIG. 3(D) shows the arrangement of the exciter field coil 8. Figure 3 (A) or D
), and as shown schematically in FIG. 2 for convenience of explanation, the main generating coil 5 has two poles, the main excitation generating coil 6 also has two poles, and the exciter field coil has two poles. 8 are arranged in the slots ① to ＠ so as to form four poles.

Further, as shown in FIG. 2, the nine rotor 2 is configured to have the same number of magnetic poles as the exciter field coil 8 (four poles in the embodiment shown in FIG. 2). has been done. The main field coil 7 is arranged so as to form the north and south poles shown in bold in FIG.
E) The exciter generating coil 9 is wound as shown in the figure, and the exciter generating coil 9 is wound so that the four poles of (N) pole and (S) pole shown in the fine print in Figure 2 are formed, and as shown in Figure 3 (F). Wound as shown. That is, an induced voltage is generated in the main generator coil 5 and the main excitation generator coil 6 by the rotating magnetic field caused by the magnetic poles (N and S poles in bold in FIG. 2) created on the rotor 2 by the main field coil 7. do. and.

In the present invention, the magnetic poles formed on the stator 1 and rotor 2 are in addition to the north and south poles formed by the main field coil 7, which are shown in bold.

Four magnetic poles (poles ■ and ■ shown in FIG. 2) formed on the stator 1 side by the exciter field coil 8 and four alternating magnetic poles formed by the exciter generating coil 9 (
There are (N) and (S) poles shown in Figure 2, but the latter two are an integral multiple of the number of poles formed by the main field coil 7, so the main field Desired power generation is performed without interfering with the magnetic flux due to the magnetic poles formed by the magnetic coil 7.

In the embodiment shown in FIGS. 2 and 3, the exciter field coil 8 and the exciter splitting coil 9 are
Although the main field coil 7 has a four-pole configuration, the present invention is not limited thereto.
It is sufficient if it is an integral multiple of the number of magnetic poles.

(Effects of the Invention) As explained above (1) According to the present invention, the winding mode of the exciter field coil 8 and the exciter power generation coil 9 is changed to generate a magnetic pole that is an integral multiple of the magnetic pole created by the main field coil 7. By winding the exciter field coil in such a manner that the coil is wound tightly, it becomes possible to wind the exciter field coil together with the main generating coil and the exciter excitation generating coil around the stator, and to wind the exciter generating coil together with the main field coil around the rotor. , it can greatly contribute to the miniaturization and weight reduction of brushless self-excited generators.

[Brief explanation of drawings]

FIG. 1 is a basic electrical circuit diagram of the brushless self-excited generator of the present invention, FIGS. 2 and 3 (A) to CF) are explanatory diagrams of the coil winding state in one embodiment of the present invention, Fourth
Figures (A) and (B) represent a schematic diagram and an electric circuit diagram of the main parts for explaining a conventional brushless self-excited generator. In the figure, 1 is a stator, 2 is a rotor, 5 is a main generator coil, 6 is a main excitation generator coil, 7 is a main field coil,
8 represents an exciter field coil, and 9 represents an exciter power generation coil.

Claims (1)

[Claims] In a brushless self-excited generator equipped with an exciter field coil, an exciter generator coil, a main field coil, a main generator coil, and a main excitation generator coil, the exciter field coil, the main generator coil, and the main excitation generator coil are provided. is wound around a stator, and the exciter generating coil and the main field coil are wound around a rotor, and the exciter field coil has a magnetic pole that is an integral multiple of the magnetic pole generated by the main field coil. The brushless self-excited generator is characterized in that the exciter field coil is configured to have the same number of poles as the magnetic poles generated by the exciter field coil.