Electricity: single generator systems – Automatic control of generator or driving means – Voltage of generator or circuit supplied
Patent
1989-02-06
1990-04-03
Wong, Peter S.
Electricity: single generator systems
Automatic control of generator or driving means
Voltage of generator or circuit supplied
322 73, 361 21, H02J 716, H02P 930
Patent
active
049143743
ABSTRACT:
A voltage regulator circuit for an AC generator is disclosed which comprises a holding circuit for holding the power transistor, which is coupled in series with the field winding of the generator, in the non-conductive state after the Zener diode of the voltage detecting circuit is turned off, and a releasing circuit for releasing the holding action of the holding circuit periodically at a predetermined interval. The holding circuit includes a pair of transistors turned on and off in phase and in antiphase with the power transistor, respectively, the transistor in antiphase, when conductive, holding the power transistor in the non-conductive state. The releasing circuit, on the other hand, includes a pulse generator for generating trigger pulses periodically at a predetermined interval, and a transistor which is turned on by these trigger pulses to turn off the transistor in antiphase holding the power transistor in the non-conductive state. The interruption frequency of the excitation current, i.e., the frequency of turning on and off of the power transistor, is equal to the frequency of releasing actions of the releasing circuit occurring at said predetermined interval.
REFERENCES:
patent: 3820009 (1974-06-01), Itoh et al.
patent: 4310792 (1982-01-01), Iwatani et al.
patent: 4349854 (1982-09-01), Mori et al.
patent: 4570198 (1986-02-01), Storti et al.
Iwatani Shiro
Watanabe Hirofumi
Mitsubishi Denki & Kabushiki Kaisha
Peckman Kristine
Wong Peter S.
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