Electricity: single generator systems – Generator control – With excitation winding and/or circuit control
Patent
1984-01-27
1985-12-24
Hickey, R. J.
Electricity: single generator systems
Generator control
With excitation winding and/or circuit control
320 56, 320 61, 320 64, 322 88, H02J 714, H02P 910
Patent
active
045609160
DESCRIPTION:
BRIEF SUMMARY
CROSS-REFERENCE TO COPENDING APPLICATIONS
Reference is made to copending applications having the same inventors as the present application, namely Ser. Nos. 576,387 and 576,388.
FIELD OF TECHNOLOGY
The present invention relates to an alternating current generator used for a car.
BACKGROUND OF TECHNOLOGY
FIG. 1 is a circuit diagram showing an embodiment of the conventional alternating current generator for a car. In the figure, the reference numeral 1 designates an armature coil having a three phase connection for generating an alternating current output and the numeral 2 designates a field coil, these parts constituting a three phase alternating current generator. The reference numeral 3 designates a main rectifying device for rectifying the alternating current output of the armature coil 1; the numeral 4 designates an auxiliary rectifying device for rectifying the alternating current output of the armature coil 1; the numeral 5 designates a voltage controlling device which turns on and off an exciting current passing to the field coil 2; the numeral 6 designates a key-switch; the numeral 7 designates a charge lamp connected to the key-switch 6 in series; and the numeral 8 designates a battery.
The positive side of the battery 8 charged by the output of the main rectifying device 3 is connected to the voltage controlling device 5 through a serial connection of the key-switch 6, a charge lamp 7 and the field coil 2. The output of the auxiliary rectifying device 4 is, on one hand, connected to the voltage controlling device 5 and is, on the other hand, connected to the voltage controlling device 5 through the field coil 2.
The operation of the circuit constructed as above-mentioned will be described.
First of all, when the key-switch 6 is closed, an exciting current is passed to the field coil 2 through a circuit of the positive (+) side of battery 8-key-switch 6-charge lamp 7-field coil 2-voltage controlling device 5-negative (-) side of battery 8. After this, when an engine is actuated for revolution whereby the terminal voltage of the generator increases, an exciting current is supplied from the auxiliary rectifying device 4 to the field coil 2 and the generator starts to generate power as a self-excited generator.
In such alternating current generator constructed as above-mentioned, however, a part of an output current is consumed as an exciting current to cause reduction in output for the exciting current corresponding to about ten percent of the output current of the generator and to cause consumption of excessive power of the engine disadvantageously.
SUMMARY OF THE INVENTION
In the present invention, a separately exciting means for exciting a field coil by a solar battery and a charging means for charging a battery by the solar battery are provided and the field coil is excited by the solar battery so that a generator is used as a separately excited generator and the battery is supplementarily charged by the solar battery.
In accordance with the present invention, an exciting current for a field coil is supplied from a solar battery requiring no consumption of energy from an engine whereby the following excellent effects are attainable: much output current is obtained in comparison with the conventional generator having the same size; the size of the generator is substantially reduced; and efficiency of the generator is improved. In addition to the effects as above-mentioned, further excellent effect that the ranking of the capacity of the generator can be lowered by, for instance, one grade since a battery is supplementarily charged by the solar battery during car stoppage.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a circuit diagram of the conventional alternating current generator for a car;
FIG. 2 is a circuit diagram of an embodiment of the alternating current generator for a car of the present invention; and
FIG. 3 is a characteristic curve showing effect of the present invention in comparison with the conventional generator.
PREFERRED EMBODIMENT OF THE PRESENT INVENTION
FIG. 2
REFERENCES:
patent: 1118269 (1914-11-01), Creveling
patent: 3086161 (1963-04-01), DeCarbo et al.
patent: 3246232 (1966-04-01), Langston et al.
patent: 3444946 (1969-05-01), Waterbury
patent: 3559027 (1971-01-01), Arsem
patent: 4301376 (1981-11-01), Ragaly
Akio Matsumoto
Mitsuyoshi Yokota
Yoshiyuki Iwaki
Hickey R. J.
Mitsubishi Denki & Kabushiki Kaisha
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