Transformer coupled power switching circuit

Details Transformer coupled power switching circuit Transformer coupled power switching circuit

1987-05-06

1988-05-31

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

363 58, 363 98, 323289, H02H 7122, H02M 3335

Patent

active

047485329

ABSTRACT:
A power switching circuit for switching power repetitively to a load at a relatively low frequency employs a power switching device which is driven across an isolating transformer interface. The drive signals are high frequency pulse signals which are modulated with the low frequency switching information, the modulations being detected in the secondary circuit of the transformer. Such an arrangement affords isolated driving with fast switching edges and requires only a small transformer. Power for the detection circuit is derived by rectification of the high frequency signals induced in the transformer secondary.

REFERENCES:
patent: 3805094 (1974-04-01), Orlando
patent: 3820008 (1974-06-01), Guarnaschelli
patent: 4270164 (1981-05-01), Wyman et al.
patent: 4527228 (1985-07-01), Chi Yu
patent: 4584635 (1986-04-01), MacInnis et al.
patent: 4586119 (1986-04-01), Sutton
Elektrotecnische Zeitschrift, "GTO-Thyristoren in selbstgefuhrten stromrichtern", Heuman et al. vol. 104 (1983) p.328.
Electronics, "Modulating the Flyback Inverter Reduces Supply's Bulk", Brunstein, Aug. 2, 1979, p. 119.

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