JPH0461586B2 - - Google Patents

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 A brushless self-excited generator whose size is reduced 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 together with a main field coil around a rotor. It is related to.

(Prior Art and Problems to be Solved by the Invention) Conventionally, brushless self-excited generators (hereinafter simply referred to as generators) as illustrated in FIGS. 4A and 4B have been known. There is. Furthermore, Figure 4A
4 is a schematic diagram showing the configuration of the main parts of the above-mentioned conventional generator, and FIG. 4B shows 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 generator is constituted by an exciter stator 3 around which an exciter field coil 8 is wound and an exciter rotor 4 around which an exciter power generation coil 9 is wound. The rotors 2 and 4 are fixed to a rotating shaft 10, and a fourth
Although not shown in Figure A, the main field coil 7 and the exciter power generation coil 9 are connected via a rectifier 11, as shown in Figure 4B. The conventional generator shown in FIG. 4A is electrically constructed as shown in the circuit diagram shown in FIG. 4B. The operation of the above conventional generator having the configuration as shown in the circuit diagram shown in FIG. 4B is generally well known and is basically the same as the generator of the present invention described later, so a description of the operation will be omitted. However, in Fig. 4B, the symbol 11
and 12 is a rectifier, 13 is a voltage adjustment circuit, 14
represents the load, and the other symbols correspond to the symbols shown in FIG. 4A.

In the conventional generator shown in FIGS. 4A and 4B, the so-called main generator and exciter generator use the same rotating shaft 10 as described above, so the rotating shaft 10 is long. As a result, the generator not only becomes longer in the axial direction, but also becomes heavier, which is an undesirable problem.

To solve this problem, we considered a generator with a structure in which the main power generation winding part and the exciter power generation winding part, which have different numbers of magnetic poles, are wound together on the same iron core. (Japanese Unexamined Patent Publication No. 49-67107). However, in this known generator, sufficient consideration was not given to the winding manner of the main field coil and the exciter generating coil wound on the rotor, and the magnetic pole structure, and the generator was hardly of practical use.

(Means for Solving the Problems) The present invention aims to solve the above problems, and therefore, the brushless self-excited generator of the present invention includes an exciter field coil, an exciter generating 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 four magnetic poles, which are twice the two magnetic poles generated by the main field coil. At the same time, the exciter generator coil is configured to have four magnetic poles, the same number as the magnetic poles generated by the exciter field coil, and the rotor has two salient poles with a large cross-sectional area facing in the 180° direction. and two salient poles with a small cross-sectional area that cross the two salient poles with a large cross-sectional area, and the main field coil is arranged on the two salient poles with a large cross-sectional area. The exciter generator coil is wound to form two magnetic poles, and the exciter generating coil is wound on the two salient poles having a large cross-sectional area and the two salient poles having a small cross-sectional area. It is a feature. This will be explained below with reference to the drawings.

(Embodiments of the Invention) Fig. 1 is a basic electric circuit diagram of a brushless self-excited generator of the present invention, Fig. 2 and Fig. 3 A to F
shows an explanatory diagram of a coil winding state in an embodiment of the present invention. Note that the symbols in the figure correspond to those in FIG. 4A and B.

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
The exciter generator coil 9 is also provided in the rotor 2 together with the main field coil 7. The ability to have performance equivalent to the conventional generator described at the beginning of this specification with such a configuration is due to the fact that the winding manner of each coil and the aspect of the number of poles of the rotor 2 in the present invention are Although this can be realized by the following description in connection with FIGS. 2 and 3, the power generation operation of the generator of the present invention will be explained prior to the explanation regarding FIGS. 2 and 3. will be explained with reference to FIG.

In FIG. 1, the main generating coil 5 is caused by the rotating magnetic field generated by the rotation of the rotor 2.
The rotating magnetic field for inducing voltage in the main generating coil 5 is generated by supplying the output of the exciter generating coil 9 to the main field coil 7 via the rectifier 11. . The induced voltage of 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 transmitted to the stator 1 via the rectifier 12 and the voltage adjustment circuit 13. This is generated by being supplied to the exciter field coil 8. In addition,
The excitation current supplied to the exciter field coil 8 is controlled based on the divided voltage of the output voltage of the main generating coil 5 in the voltage regulating circuit 13, thereby controlling 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 residual magnetism in the rotor 2. As described 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 having the winding mode of each coil. Below, Figures 2 and 3
This will be explained using figures.

In the embodiment shown in FIG. 2, the slots for arranging the coils are provided in the stator 1, and the main generating coil 5, as shown in FIGS. 3A to D, are inserted into the slots. A main excitation power generation coil 6 and an exciter field coil 8 are provided. That is, FIG. 3A shows the slot or position, FIG. 3B shows the arrangement of the main generator coil 5, FIG. 3C shows the main excitation generator coil 6, and FIG. 3D shows the arrangement of the exciter field coil 8. It shows.
As shown in FIGS. 3A to 3D, and as shown schematically in FIG. 2 for convenience of explanation, the main power generating coil 5 has two poles, and the main excitation power generating coil 6 also has two poles. The exciter field coil 8 is arranged in the slot so as to form four poles.

Further, as shown in FIG. 2, the 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. In other words, two salient poles with large cross-sectional areas extending in the direction of 180° as shown (salient poles with N and S in bold in the diagram)
and two salient poles with a small cross-sectional area (salient poles with N and N written in fine print in the illustration) that are arranged to cross the two salient poles with a large cross-sectional area. . And the main field coil 7
are wound so as to form N and S poles shown in bold in FIG. 2, and as shown in FIG. It is wound so that four poles of (S) poles are formed and as shown in FIG. 3F. 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. Occur. In the present invention, the magnetic poles formed in the stator 1 and the rotor 2 are, in addition to the N and S poles of the illustrated characters formed by the main field coil 7, the exciter field coil 8 formed on the stator 1 side (poles shown in the second figure) and four alternating magnetic poles formed by the exciter generating coil 9 (shown in the second figure (N), (S) pole) exists, but
Since the latter two have twice the number of poles formed by the main field coil 7, they do not interfere with the magnetic flux due to the magnetic poles formed by the main field coil 7. , desired power generation is performed.

As described above, by increasing the cross-sectional area of the salient poles around which the main field coil 7 is wound, the magnetic flux produced by the rotor is reduced by the magnetic flux produced by the two magnetic poles. , is larger than the magnetic flux created by the magnetic poles of the above-mentioned four-pole configuration, and the amount of the twice the frequency component riding on the voltage of the fundamental frequency induced in the main generating coil is small, resulting in distortion of the waveform as a whole. It will be relatively small.

Note that there is a risk that distortion may occur in the waveform of the voltage induced in the 4-pole exciter generator coil.
Since this voltage is rectified and used to supply direct current, the distortion of the waveform does not pose a problem.

(Effects of the Invention) As explained above, 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 twice as large as the magnetic pole created by the main magnetic field coil 7. By winding the exciter field coil in such a manner that the exciter field coil is wound around the stator together with the main generating coil and the exciter excitation generating coil, the exciter generating coil can be wound around the rotor together with the main field coil. This makes it possible to greatly contribute to downsizing 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 F are explanatory diagrams of coil winding states in an embodiment of the present invention, and FIG. 4 DESCRIPTION OF THE PREFERRED EMBODIMENTS A and B represent a schematic diagram and an electric circuit diagram of main parts for explaining a conventional brushless self-excited generator. In the figure, 1 represents a stator, 2 a rotor, 5 a main power generation coil, 6 a main excitation power generation coil, 7 a main field coil, 8 an exciter field coil, and 9 an exciter power generation coil.

Claims (1)

[Claims] 1. A brushless self-excited generator equipped with an exciter field coil, an exciter power generation coil, a main field coil, a main power generation coil, and a main excitation power generation coil, wherein the exciter field coil and the main power generation coil The coil and the main excitation generator coil are wound around a stator, and the exciter generator coil and the main field coil are wound around a rotor, and the exciter field coil is wound by the main field coil. The exciter generating coil is configured to generate four magnetic poles twice as many as the two generated magnetic poles, and the exciter generating coil is configured to have four magnetic poles the same number as the magnetic poles generated by the exciter field coil. The child has two salient poles with a large cross-sectional area facing in the 180° direction, and two salient poles with a small cross-sectional area that cross the two salient poles with a large cross-sectional area, and the main The field coil is wound around the two salient poles having a large cross-sectional area to form the two magnetic poles, and the exciter power generation coil is wound around the two salient poles having a large cross-sectional area, and the exciter generating coil is wound around the two salient poles having a large cross-sectional area. A brushless self-excited generator characterized by being wound around two salient poles with a small cross-sectional area.