公开(公告)号：US3252077A

公开(公告)日：1966-05-17

申请号：US20951362

申请日：1962-07-13

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： SCHONHOLZER EMIL T ,  PERRIN EUGENE M

IPC: H02M1/08 ,  H02M7/155 ,  H02M7/217 ,  H03K3/45

CPC classification number: H03K3/45 ,  H02M1/081 ,  H02M7/1555 ,  H02M7/217 ,  H02M7/2173

公开(公告)号：US3643112A

公开(公告)日：1972-02-15

申请号：US3643112D

申请日：1970-01-09

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： PERRIN EUGENE M

IPC: H02M7/162 ,  H02M7/757 ,  H03K5/153 ,  H03K17/08 ,  H03K17/72

CPC classification number: H02M7/757 ,  H02M7/1623

Abstract: The invention comprises a thyristor gate pulse generator circuit including phase shifting and pulse-shaping networks to develop controlled firing pulses for single converter operation, or dual converters operating in the circulating current mode. A controlled DC voltage is compared with an AC input with the intercepts determining the firing angle of the thyristors. The use of a single AC voltage and both positive and negative intercepts insures inherently the sum of forward and reverse thyristor gating angles is maintained > OR = 180*. The AC input to the comparator is the cosine of the line voltage applied to the converters to achieve symmetry of operation around 90*.