JPH03215199A - Output characteristic regulator for generator - Google Patents

Abstract

PURPOSE:To contrive output characteristic to be changed and enable the output characteristic of a generator to be changed with simple composition by setting a switching section for enabling a voltage taking-out position from an output tap, to be switched, and by switching the position at the switching section. CONSTITUTION:An output winding 6 is provided with a plurality of output taps 8-0, 8-1-8-4, and a switching section 8 for enabling a voltage taking-out position to be switched with the output taps 8-0, 8-1-8-4, and an automatic voltage regulating circuit 13 for enabling the output voltage of a generator to be regulated with voltage detected from the output winding 6 of the switching section 8, are arranged, and by switching the positions of the output taps 8-0, 8-1-8-4 with the switching section 8, output characteristic is contrived to be changed. In other words, the current level of load current for turning ON/OFF the switch of the automatic voltage regulating circuit 13 by the tap positions of the output winding 6 is changed, and so the output characteristic is made different.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to adjusting the output characteristics of a generator, which allows the output characteristics to be adapted to a desired load by switching the position of the voltage extraction tap from the output winding. It is related to the device. In particular, it can be applied to portable engine generators that are often used for various purposes.

[Conventional technology]

FIGS. 4A and 4B are explanatory diagrams of output characteristics of a generator in a conventional example.

In a conventional generator equipped with an automatic voltage adjustment circuit, the output voltage is detected from a part of the output winding, and if the detected voltage is high, the field current is turned off, and when the output voltage decreases, This voltage is detected and the field current is turned on. As shown in Figure 4 (a), the general output characteristics of conventional generators are that the voltage is maintained at a substantially constant level by an automatic voltage regulator etc. up to the rated current, and in the overload region, the motor Appropriate drooping characteristics are provided in order to improve starting performance or when a short-circuit current occurs.

However, different characteristics may be required depending on the application. For example, in the case of a battery charging generator, as shown in FIG. Also, Figure 4 (mouth) b
As shown in the figure, there are cases where constant voltage and constant current characteristics are required in which the current does not exceed the rated current.

[Problem to be solved by the invention]

However, if different output characteristics were required for a single generator, the windings were wound in a special way or a complex control circuit was used.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, it is an object of the present invention to provide a generator output characteristic adjusting device that has a simple configuration and can obtain output characteristics that are adapted to a desired load.

[Means to solve the problem]

In order to achieve the above object, the generator output characteristic adjusting device of the present invention has a plurality of output taps (8-0, 8-0,
8-L 8-2, . . . 8-4) is provided, and the voltage extraction position by the output tap (8-0, 8-1, 8-2, . . . 8-4) can be switched. The output tap (8-0, 8-118-
2, . . . 8-4) by switching the positions thereof using the switching section 8 to change the output characteristics.

[For production]

The output winding 6 is distributed and wound at a plurality of slot positions of the stator. For this reason, the influence of the armature reaction is different for each slot position, and the voltage characteristics with respect to the load current are different for each part of the output winding 6 wound at each slot position. For this purpose, by switching the tap position from which the detected voltage is extracted, a voltage having characteristics corresponding to the tap position is extracted as the detected voltage. Based on this detected voltage, a switch of an automatic voltage adjustment circuit is turned on and off to control the field current. In other words, the current level of the load current that turns the switch of the automatic voltage regulator circuit ON and OFF changes depending on the tap position of the output winding, so the output characteristics representing the relationship between the voltage generated in the output winding and the load current will differ. Become.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is an explanatory diagram of a generator output characteristic adjusting device according to the present invention, and FIG. 2 is a schematic cross-sectional view of the generator according to the present invention.

In the figure, a field winding]-2 is wound around a rotor core 1-1 of a rotor 1. Rotor core 1- shown in Figure 2
1 shows a state in which the field winding 1-2 is not wound. In the slots 3-1 of the laminated stator core 3, coils ■ to ■ and ■ are installed as output winding blocks 5.
or ■ is wound. Coils ■ to ■ and ■ to ■ of the output winding block 5 constitute the output winding 6 of the generator, and coils ■ and ■ constitute the excitation winding 4. Further, the slots 3-1 in which the coils 1 to 0 are wound face each other, five slots 3-1 on each side every 360°/14. The teeth 3-2 are provided with grooves 3-3 at their tips, and are equally spaced into 28 teeth along the part facing the air gap formed by the rotor core 1-1 and the stator core 3. .

Furthermore, when the rotor 1 is rotating clockwise, for example, the coils ■ and 0 of the excitation winding 4 are replaced by the coils ■ and ■ of the output winding 6 and the coils ■ and ■ of the output winding 6, as shown in FIG.
It is placed at the rear of the

Coils ■ to ■ of output winding wA6 have taps 8-0, 8-1, 8-2, 8-3, 8- for each coil of output winding 6.
A load 7 is connected to one end 8-0 of the coil (2) of the output winding 6 and the other end of the coil (2) of the output winding 6.

A switching unit 8 that switches the detection voltage extraction position by switching the taps 8-0, 81, 8-2, 8-3, and 8-4.
is provided, and the voltage of any one of coils (1) to (2) of each output winding 6 can be detected. This detected voltage is then given to the automatic voltage adjustment circuit 13.

The automatic voltage adjustment circuit 13 includes a smoothing capacitor 1o that smoothes the DC voltage after rectifying the voltage induced in the excitation winding 4 with a rectifier 9, and a smoothing capacitor 1o that smoothes the DC voltage, and transfers the electric charge of the capacitor 10 to the field through a slip ring 11. Switches 14, 16, 19 for supplying the magnetic winding 1-2, and the switch l
4, l6, and 19, and a rectifier 17 that rectifies the voltage detected by the switching unit 8.

Suppose now that the rotor 1 starts rotating, for example, by an engine or the like. Electromotive force is generated in the excitation winding 4 and the output winding 6, and supplies power to the load 7.

The voltage detected from the taps 8-0 and 8-1 of the switching unit 8 is converted into a DC voltage by the rectifier 17. However, if the voltage of the output winding 6 does not reach the desired voltage, the Zener diode 18 cannot be rendered conductive. Therefore, switch 19 maintains the OFF state, and switches 16 and 14 are in the ON state.

On the other hand, the electromotive force generated in the excitation winding 4 is rectified by the rectifier 9, and the ten terminals of the capacitor 1o are connected to the slip ring 1.
1--field winding (1-2)--slip ring 11'--supplies field current which returns to one terminal of capacitor 10 through switch 14.

When the electromotive force generated in the output winding 6 reaches a desired voltage, the detected voltage is converted into a DC voltage by the rectifier 17, turns on the Zener diode 18, and turns the switch 19 on.

When switch 19 is turned ON, switches 16 and 14 are turned OFF.
The current is turned FF, and the current supplied to the field winding 1-2 is cut off. In this way, the current flowing through the field winding 12 is ○N1
0FFL to make the output of the output winding 6 have the desired characteristics. For example, the detected voltage from the output winding 6 is transferred to the output winding block 5.
When the voltage is taken out from (2) in Figure 3, the voltage drops suddenly when the rating is exceeded, and becomes close to constant voltage constant current characteristics. Therefore, overcurrent can be prevented from flowing through the load 7.

Next, the detected voltage from the output winding 6 is applied to the output winding block 5.
When the voltage is taken out from the taps 8-1 and 8-2 shown in FIG. 1, the voltage becomes constant up to the rated voltage and then slowly drops, as shown in FIG. 3. Therefore, it is suitable for starting a motor, etc.

Furthermore, if the detected voltage from the output winding 6 is extracted from the output winding block 5 from the
As shown, a characteristic in which voltage x current is approximately constant is obtained. Therefore, it is effective when charging a battery, etc.

In addition, the detected voltage from the output winding 6 is output to the output winding block 5.
If it is taken out from (2), the characteristic shown in FIG.

As described above, the output characteristics of the generator can be changed by switching the positions of the taps 810 to 8-4 of the switching section 8 for the output winding 6. That is, since the composite vector of the magnetic field based on the armature reaction due to the armature current and the field magnetic field due to the field current differs for each slot position, the output characteristics can be changed. By using the differently influenced detection voltages, the output characteristics can be changed.

Although the switching section has been described above as an example of switching the positions of the taps 8-0 to 8-4, the same effect can be obtained even if the taps 8-4 to 8-8 are provided and switching is made between them.

The case of taps 8-0 and 8-1 and the case of taps 8-4 and 8-5 show the same characteristic (Fig. 3). The characteristics of ■, ■, and ■ are also similar.

〔Effect of the invention〕

According to the present invention, the output characteristics of the generator can be changed with a simple configuration of simply switching the position of the detection coil of the output winding.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the generator output characteristics adjusting device in the present invention, FIG. 2 is a schematic cross-sectional diagram of the generator in the present invention, FIG. 3 is an explanatory diagram of the output characteristics of the generator in the present invention, and FIG. ) and (b) are explanatory diagrams of output characteristics of a generator in a conventional example. 1... Rotor 1-1... Rotor core 1-2... Field winding 3... Stator core 3-1... Slot 3-2... Teeth 3-3.・Groove 4 ・Excitation winding 5 ・Output winding block 6 ・Output winding 7 ・Load 8 ・Switching section 13 ・Automatic voltage adjustment circuit 1-' H + 76 shots {Collected Drinking Menle Motomachi 4 Figure 2

Claims (1)

[Claims] In an output characteristic adjustment device for a generator equipped with an automatic voltage adjustment circuit, a switching unit is provided with a plurality of output taps on an output winding and is configured to switch the voltage extraction position from the output taps. and an automatic voltage adjustment circuit that can adjust the output voltage of the generator according to the voltage detected from the output winding of the switching section, and the output characteristics can be changed by switching the position of the output tap with the switching section. A generator output characteristics adjustment device that can be used.