公开(公告)号：DE3882328T2

公开(公告)日：1994-02-17

申请号：DE3882328

申请日：1988-09-16

Applicant: IBM

Inventor： GILLETT JOHN BRIAN ,  SPREEN JAMES HAROLD

IPC: B42D15/10 ,  G06K7/00 ,  H01F38/14 ,  H02J17/00 ,  H02M3/28 ,  H01F23/00 ,  H02M1/14

Abstract: A regulated voltage electrical power system has a driving section and a driven section. The driving section includes a power transformer primary structure and a ripple current carrying, driving winding of a filter system for the smoothed outputs circuits of the power system, each of which includes a single turn, driven filter winding magnetically coupled to the driving winding by a multi-path core structure. Each driven filter winding links that part of the multi-path structure which corresponds in cross-sectional area to the relative ripple voltage imposed by the power transformer on it. The power transformer secondaries for the outputs of the power system are also of a single turn each, differing output voltages being achieved by provision of differing number of primary winding turns associated with the various outputs. Planar diodes and core gap-filling ferrite inserts are provided in the secondary winding structures.

公开(公告)号：DE3882328D1

公开(公告)日：1993-08-19

申请号：DE3882328

申请日：1988-09-16

Applicant: IBM

Inventor： GILLETT JOHN BRIAN ,  SPREEN JAMES HAROLD

IPC: B42D15/10 ,  G06K7/00 ,  H01F38/14 ,  H02J17/00 ,  H02M3/28 ,  H01F23/00 ,  H02M1/14

Abstract: A regulated voltage electrical power system has a driving section and a driven section. The driving section includes a power transformer primary structure and a ripple current carrying, driving winding of a filter system for the smoothed outputs circuits of the power system, each of which includes a single turn, driven filter winding magnetically coupled to the driving winding by a multi-path core structure. Each driven filter winding links that part of the multi-path structure which corresponds in cross-sectional area to the relative ripple voltage imposed by the power transformer on it. The power transformer secondaries for the outputs of the power system are also of a single turn each, differing output voltages being achieved by provision of differing number of primary winding turns associated with the various outputs. Planar diodes and core gap-filling ferrite inserts are provided in the secondary winding structures.

公开(公告)号：DE3682653D1

公开(公告)日：1992-01-09

申请号：DE3682653

申请日：1986-09-23

Applicant: IBM

Inventor： GILLETT JOHN BRIAN ,  SPREEN JAMES HAROLD

IPC: H01F30/00 ,  H02M3/28 ,  H03H7/09 ,  H02M3/337 ,  H01F29/00

公开(公告)号：DE3467840D1

公开(公告)日：1988-01-07

申请号：DE3467840

申请日：1984-07-18

Applicant: IBM

Inventor： SPREEN JAMES HAROLD

IPC: H02J1/02 ,  H02M1/14 ,  H02M3/335 ,  H02M3/28

Abstract: A power supply circuit for producing at least one output which is essentially free from current ripple is disclosed. A chopped DC voltage source (VB) is applied to a transformer having a primary coil (P1) and at least two secondary coils (S1,S2). The secondary coils provide input voltages to output stages which each include a rectifier diode (D1,D2), a free-wheeling diode (D3,D4) and an LC filter. The inductors (L1,L2) in the LC filter of adjacent output stages are magnetically coupled together. The characteristics of these inductors are selected such that the current ripple through the inductors in all the output stages, other than the first output stage, is essentially zero. Multiple inductors can also be employed in the first output stage with each one being magnetically coupled to the inductor in a different succeeding output stage. These multiple inductors in the first output stage can be combined in series or in parallel. A chained approach to coupling inductors as well as the use of an add-on ripple transformer can also be employed to produce at least one essentially ripple-free output.