公开(公告)号：DE3377441D1

公开(公告)日：1988-08-25

申请号：DE3377441

申请日：1983-09-15

Applicant: IBM DEUTSCHLAND ,  IBM

Inventor： BORTZEL MARTIN ,  LUDWIG REINHOLD ,  SCHMITS WILHELM ,  WEISS ULRICH

IPC: H02M3/28 ,  H02M3/337 ,  H02M5/42 ,  H02H7/122

Abstract: The ocurcurrent protection circuit (10) is used for protecting the switching transistors (Q1,Q2), by disconnecting the driver pulses for the latter upon a critical current value (Ic) being reached. A further protection stage (14) prevents the driver pulses for the switching transistors (Q1,W2) being reinstated for a timed duration upon the increased overload. The initial disconnection stage (12) responding immediately and the further protection stage (14) with a delayed action are both controlled directly via the primary current, i.e. the emitter current (I1,I2) through the conductive switching transistor (Q1, Q2).

公开(公告)号：AT35882T

公开(公告)日：1988-08-15

申请号：AT83109122

申请日：1983-09-15

Applicant: IBM

Inventor： BOERTZEL MARTIN ,  LUDWIG REINHOLD ,  SCHMITS WILHELM ,  WEISS ULRICH

IPC: H02M3/28 ,  H02M3/337 ,  H02M5/42 ,  H02H7/122