JPS6146149A - Inductor type brushless generator - Google Patents

Abstract

PURPOSE:To obtain an inductor type brushless generator which uses as an inductor generator as an exciter of a synchronous generator by disposing inductor salient poles on the stator of the synchronous generator, and providing an exciting output winding on a rotor. CONSTITUTION:A salient-pole 1 is formed on a play slot which occupies approx. 1/3 of a slot in a stator of a salient pole type single-phase synchronous generator. Two sets of 8 slot groups are provided on the remaining portion of a stator core, and a main armature winding 3 is inserted. On the other hand, a rotor splits the peripheral surface of a field core 5 into portions for field and exciting windings 4, 6, and the winding 6 is inserted into a slot formed on a field pole. Thus, the feature of the inductor generator can be utilized to excite, thereby improving the voltage change rate.

Description

[Detailed description of the invention] 〔Technical field〕 The present invention relates to an inductor type brushless generator.

[Prior art and its problems]

Conventionally, brush-equipped generators are common as single-phase synchronous generators with a capacity of less than 10 KW (KVA), and some are equipped with brushes.

However, all of these have the following drawbacks. First of all, the type B with brushes is prone to problems in the current collecting part, and since a slip ring is installed on the extension of the generator axis, the overall length of the generator becomes longer, which creates a large dead space in the power generation garden. As a result, the shape of the generator becomes extremely large.

Next, when looking at brushless devices, there were three methods. The first method is to install an excitation generator on the same axis of the main generator, and since there is a limit to reducing the size and cost of the excitation generator due to manufacturing reasons, the capacity of the main generator is limited.
The smaller the value, the greater the proportion occupied by the exciter, and in practice this method is difficult to use for a 10KW (KVA) generator. The second type is a capacitor type, and this method is IKW
It is only used for small scale devices below 1KW, and is not put into practical use due to the increased cost of capacitor windings and the increased capacitance of the capacitor windings. Therefore, the third option is to combine high-frequency generators for synchronous power generation, as shown in Japanese Patent Publication No. 32-10122, but this high-frequency generator can only generate an output of a few watts, and brushless Generator excitation I! It cannot be used as a single condyle.

[Purpose of the invention]

The present invention has been made in consideration of the above-mentioned points, and focuses on the fact that the voltage fluctuation rate of the inductor type lightning generator is good. The purpose is to provide 12 type brushless generators.

(Summary of the Invention) In order to achieve this object, the present invention provides an integral structure with the synchronous generator by disposing inductor salient poles on the stator of the synchronous generator and providing an excitation output winding on the rotor. Incorporating an excitation generator configured as an inductor type generator, as a result, an inductor type brushless generator with voltage fluctuation rate characteristics equivalent to or superior to conventional brushless photoelectric generators without using a voltage interpolation circuit. This is what we provide.

(Embodiment) Fig. 1 is a cross-sectional view of one embodiment of the present invention.
A convex pole 1 is provided in the idle slot portion occupying 3. In the illustrated embodiment, one convex pole is placed at an interval of 60' and 202
Set up two sets with Then, in the remaining part of the stator core, two groups of eight slots are installed at 15" intervals.
Assemble and insert the main armature winding 3.

On the other hand, in the rotor, the circumferential surface of the field 11 iron core 5 is divided into two parts: a part for the field winding 4 and a part for the excitation r and na wires 6.
The 11δ wires 6 are inserted into slots provided at 10° intervals in the field poles, and the field windings 4 are 2fll! It is composed of J coils.

FIG. 2 shows the connection of each winding in the generator of FIG. 1. On the stake side, m11 child winding FA3 is connected to output terminals U and ■. Furthermore, on the rotor side, the excitation winding 6 is connected to the field winding 4 via a rectifier RO.

With such a connection, the following operations are performed.

First, when the generator is operated at the rated rotational speed, the residual magnetic flux of the field 1G iron core 5 changes once it reaches a position facing the convex pole 1 of the stator. This change in magnetic flux appears in the excitation winding 6 as an induced electromotive force. This electromotive force is rectified and supplied to the field winding 4, and the field magnetic flux and the voltage induced in the excitation winding gradually increase to establish automatic operation.

Note that if sufficient residual magnetic flux is not obtained in the field till iron core, first 1! l] Establish voltage by excitation circuit.

Once the voltage rises to (11E), self-excitation is performed thereafter.

3 to 6 show various characteristics for explaining the voltage compensation operation in the above embodiment, and the voltage compensation operation will be explained with reference to these figures.

This generator fully saturates the magnetic circuit at no load. Therefore, the effective part of the magnetic flux change is the change m of φ1 in Figure 3.
The induction of excitation winding I26 (Figs. 1 and 2) is >9
The electromotive force produces a voltage V8 at point A in FIG.

As the load increases, as shown in Figure 5, 'f:
i(l The reaction magnetic flux φa is generated differentially with the main magnetic flux φO,
When the excitation winding 6 is located at the protrusion 1151 of the stator, the total magnetic flux m decreases and the effective portion of the magnetic flux change increases to φ2 (FIG. 3).

As a result, the electromotive force of the excitation winding 6 becomes the voltage V at point B in FIG.
Increases to B. In reality, when moving toward point B, the excitation voltage increases and is pulled back to point A, keeping the excitation voltage constant. As a result, unlike shunt-winding power generation, in which the excitation current decreases due to a decrease in the O-diameter voltage, the excitation voltage is kept approximately constant even if the terminal voltage decreases. 1 In addition, the speed vs. load characteristics of the engine that drives the 7112 aircraft are shown in Figure 6.
Therefore, at maximum output (1.0% of rated output) when no load is applied.
The current flows through the current to excite the two members. In addition, a light load is connected to the J:R generator even when fish are in stock, and the no-load rotation speed changes from No to Na, making it possible to improve the overall voltage fluctuation rate.

〔Effect of the invention〕

As described above, the present invention provides a rotary field type synchronous power generator with an inductor salient pole on the stator and an excitation output winding on the rotor, and an inductor type power generator with an excitation I1m during the synchronous power generation mode. Built-in
Therefore, it is possible to perform excitation using the inductor-type ffi-like characteristics, and to provide an inductor-type brushless generator with a good voltage fluctuation rate.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of an embodiment of the present invention, Fig. 2 is a wiring diagram of the embodiment, Fig. 3 is a characteristic diagram of changes in the working magnetic flux of the excitation winding in the embodiment, and Fig. 4 is the same. FIG. 5 is an explanatory diagram of the magnetic flux acting on the excitation winding of the embodiment, and FIG. 6 is an output versus rotation speed characteristic diagram of the embodiment. 1... Inductor convex pole, 2... Stator core, 3... Armature winding, 4... Field) 5 wire, 5... Field core, 6
...excitation winding. φ...Magnetic flux, ■...Voltage, N...Rotation speed. Applicant's agent Inomata Qing Party Figure 1 Figure 4 Party Figure 6 <W) Figure 5

Claims (1)

[Claims] 1. Main armature winding slots are provided in the stator core at first predetermined intervals, the armature winding is inserted into the slots, and the main armature winding slots are inserted into the slots. Inductor salient poles are provided at second predetermined intervals in the portion where no inductor salient poles are provided, salient pole-shaped field poles are provided in the iron core of the rotor, and excitation winding slots are provided in the field pole heads at third predetermined intervals. , an excitation winding is inserted into this slot, the field winding is provided at a predetermined location of the field pole, and the output of the excitation winding is passed through a rectifier to excite the main field winding. Child-shaped brushless generator. 2. In the generator according to claim 1, armature winding slots are provided in a 2/3 area of the circumferential surface of the stator core, and inductor convex poles are provided in the remaining 1/3 area. Inductor type brushless generator.