公开(公告)号：DE3882893T2

公开(公告)日：1994-03-17

申请号：DE3882893

申请日：1988-10-13

Applicant: IBM

Inventor： ROSS JOHN MICHAEL ,  WOODWORTH GEORGE KELSEY

IPC: H02J3/38 ,  H02J3/40 ,  H02J9/06

Abstract: An asynchronous multiphase switching method and apparatus are disclosed which transfers a system load between two asynchronous AC power sources in an improved manner. It operates as a make-before-break switch to provide uninterrupted power to the system load during the transfer while minimizing voltage and current fluctuations. The control circuitry allows energy to be supplied to the load during the transition without allowing current to flow between the power sources. A matrix of SCRs is used to transfer the load between the two power sources. The switches to be gated are determined by the relative timing relationships of the existing and takeover voltage waveforms. By altering the pattern of the switches which are gated and by controlling the direction of energy flow, the transition can be made between the power sources without interruption of power.

公开(公告)号：DE3882893D1

公开(公告)日：1993-09-09

申请号：DE3882893

申请日：1988-10-13

Applicant: IBM

Inventor： ROSS JOHN MICHAEL ,  WOODWORTH GEORGE KELSEY

IPC: H02J3/38 ,  H02J3/40 ,  H02J9/06

Abstract: An asynchronous multiphase switching method and apparatus are disclosed which transfers a system load between two asynchronous AC power sources in an improved manner. It operates as a make-before-break switch to provide uninterrupted power to the system load during the transfer while minimizing voltage and current fluctuations. The control circuitry allows energy to be supplied to the load during the transition without allowing current to flow between the power sources. A matrix of SCRs is used to transfer the load between the two power sources. The switches to be gated are determined by the relative timing relationships of the existing and takeover voltage waveforms. By altering the pattern of the switches which are gated and by controlling the direction of energy flow, the transition can be made between the power sources without interruption of power.

公开(公告)号：SG97920A1

公开(公告)日：2003-08-20

申请号：SG200004493

申请日：2000-08-14

Applicant: IBM

Inventor： COTEUS PAUL WILLIAM ,  JI BRIAN LI ,  KIRIHATA TOSHIAKI ,  ROSS JOHN MICHAEL ,  SHEN WILLIAM WU ,  HOVIS PAUL WILLIAM

IPC: G06F12/16 ,  G06F12/02 ,  G11C8/08 ,  G11C11/407