Electricity: single generator systems – Automatic control of generator or driving means – Voltage of generator or circuit supplied
Patent
1988-05-02
1989-05-16
Hickey, R. J.
Electricity: single generator systems
Automatic control of generator or driving means
Voltage of generator or circuit supplied
320 64, 322 60, H02P 908, H02P 930, H02J 724
Patent
active
048313220
ABSTRACT:
In a voltage regulator for charger/generator comprising a switching element, connected between a battery and a field winding of a generator adapted to charge the battery, for switching on and off an exciting current flowing through the field winding and a voltage detector responsive to voltage of the battery to control the operation of the switching element, there are provided an oscillator for generating an oscillation signal of a desired duty ratio, an initial excitation signal generator circuit having a plurality of stages of frequency dividers for dividing the frequency of the oscillation signal generated from the oscillator and combining together frequency division signals of the frequency dividers to produce a synthesized output signal of a desired duty ratio, a booster for boosting and rectifying an AC signal containing the oscillation signal of the oscillator and a signal which is opposite in phase to the oscillation signal to produce a boosted output signal, and excitation control means being operative, when the generator is in non-generation condition, to apply the oscillation signal of the oscillator to the booster in synchronism with the output signal of the initial excitation signal generator circuit so as to cause the booster output signal corresponding to the output signal of the initial excitation signal generator circuit to on/off control the switching element to thereby effect initial excitation of the generator and being operative, when the generator is in a predetermined generation condition, to respond to an output signal of the voltage detector so as to control the application of the oscillation signal to the booster to thereby on/off control the switching element in dependence on the battery voltage.
REFERENCES:
patent: 4250444 (1981-02-01), Iwaki et al.
patent: 4266181 (1981-05-01), Muto et al.
patent: 4293811 (1981-10-01), Muto et al.
patent: 4385270 (1983-05-01), Balan et al.
patent: 4388587 (1983-06-01), Lamoth et al.
Mashino Keiichi
Takei Shigekazu
Hickey R. J.
Hitachi , Ltd.
Hitachi Automotive Engineering Co. Ltd.
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