Electrical transmission or interconnection systems – Plural load circuit systems – Transformer connections
Patent
1987-06-19
1988-12-27
Miska, Vit W.
Electrical transmission or interconnection systems
Plural load circuit systems
Transformer connections
363 21, H02M 724, H02M 3335
Patent
active
047942703
ABSTRACT:
A switching mode power supply circuit designed to apply an operating power to the load when a relay connected to the remote control part is driven. The switch of the relay is connected to the base of the switching transistor, and the secondary winding of the transformer for making the electric power flow to the base of the switching transistor is connected to the terminals fixed on each side of the switch of the relay through the base current supply and absorption parts, respectively. Thereby, the base current of the switching transistor is varied in accordance with the driving state of the relay. The switching mode power supply circuit is operated stably regardless of the state where the operating power is applied only to the remote control part or the state where the operating power is applied to both the remote control part and the load.
REFERENCES:
patent: 3676768 (1972-07-01), Morret
patent: 3742242 (1973-06-01), Mori et al.
patent: 4209826 (1980-06-01), Priegnitz
patent: 4323961 (1982-04-01), Josephson
patent: 4447741 (1984-05-01), Moschopoulos
patent: 4686616 (1987-08-01), Williamson
Gold Star Co. Ltd.
Miska Vit W.
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