Power switching circuit

Details Power switching circuit Power switching circuit

H - Electricity

02

M

318/120, 323/4

H02M 3/335 (2006.01) H02P 1/18 (2006.01) H03K 17/691 (2006.01) H02M 7/5387 (2006.01)

Patent

CA 1248583

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.

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