公开(公告)号：BR8500628A

公开(公告)日：1985-10-01

申请号：BR8500628

申请日：1985-02-12

Applicant: IBM

Inventor： COMMANDER ROBERT DUNCAN ,  FENTON BRIAN PETER ,  RAMAGE JOHNS GILBERT

IPC: H02M7/537 ,  H02M7/5387 ,  H03K17/691 ,  H02P1/42 ,  H02P1/30

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.