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    2.
    发明专利
    未知

    公开(公告)号：DE3877326D1

    公开(公告)日：1993-02-18

    申请号：DE3877326

    申请日：1988-10-20

    Applicant: IBM

    Inventor： FELTON BRUCE CHARLES ,  MCCOY WILLIAM BARRETT

    IPC: G05F1/20 ,  H02M7/537 ,  H02M7/5387 ,  H03K17/687 ,  H03K17/691 ,  H02M3/337

    Abstract: An FET full bridge regulator has a driving transformer (28) for the gates of the power FETs (Q1 to Q4) of the regulator, and a driving circuit (26) for the primary (32) of the driving transformer, the driving circuit including a full bridge formed by first and second sets (M5, M7; M6, M8) of driving FETS, each set formed by a complementary pair of FETS and being connected across the transformer primary, one FET of each set being driven ON to together form a series of conducting paths across the primary of the transformer in the absence of driving signals. The voltage supply for the driving FETs in the driving circuits of the primary (32) of the driving transformer includes a resistance (36) across which there is developed a voltage proportional to the current drawn by the driving transformer primary in each half cycle of its operation for reducing imbalance between the half cycles.

    3.
    发明专利
    未知

    公开(公告)号：DE3884661T2

    公开(公告)日：1994-05-11

    申请号：DE3884661

    申请日：1988-03-15

    Applicant: IBM

    Inventor： FELTON BRUCE CHARLES ,  MCCOY WILLIAM BARRETT

    IPC: H02M7/04 ,  H01F27/22 ,  H01F27/40 ,  H02M3/28 ,  H01L25/10 ,  H01F27/28 ,  H02M3/00

    Abstract: A switching regulator comprises a transformer rectifier assembly including a pair of rectifiers (47, 49) and a transformer having a primary winding (11) juxtaposed to a secondary winding (13), and a core (15) of magnetic material linking the windings. The secondary winding comprises a pair of overlapping flat substantially rectangular plates, (13,24), each of the plates having an aperture to receive a common portion of the core and a slit (7,8) extending from the aperture to the perimeter of the plate. The slits (7,8) are disposed at an acute angle to one another to thereby define between them a common centre-tap portion of said secondary winding. The rectifiers (47, 49) are mounted on the plates at opposite sides of the centre-tap; and the transformer rectifier assembly is mounted on a heat sink (35).

    4.
    发明专利
    未知

    公开(公告)号：DE3884661D1

    公开(公告)日：1993-11-11

    申请号：DE3884661

    申请日：1988-03-15

    Applicant: IBM

    Inventor： FELTON BRUCE CHARLES ,  MCCOY WILLIAM BARRETT

    IPC: H02M7/04 ,  H01F27/22 ,  H01F27/40 ,  H02M3/28 ,  H01L25/10 ,  H01F27/28 ,  H02M3/00

    Abstract: A switching regulator comprises a transformer rectifier assembly including a pair of rectifiers (47, 49) and a transformer having a primary winding (11) juxtaposed to a secondary winding (13), and a core (15) of magnetic material linking the windings. The secondary winding comprises a pair of overlapping flat substantially rectangular plates, (13,24), each of the plates having an aperture to receive a common portion of the core and a slit (7,8) extending from the aperture to the perimeter of the plate. The slits (7,8) are disposed at an acute angle to one another to thereby define between them a common centre-tap portion of said secondary winding. The rectifiers (47, 49) are mounted on the plates at opposite sides of the centre-tap; and the transformer rectifier assembly is mounted on a heat sink (35).

    5.
    发明专利
    未知

    公开(公告)号：DE3877326T2

    公开(公告)日：1993-07-22

    申请号：DE3877326

    申请日：1988-10-20

    Applicant: IBM

    Inventor： FELTON BRUCE CHARLES ,  MCCOY WILLIAM BARRETT

    IPC: G05F1/20 ,  H02M7/537 ,  H02M7/5387 ,  H03K17/687 ,  H03K17/691 ,  H02M3/337

    Abstract: An FET full bridge regulator has a driving transformer (28) for the gates of the power FETs (Q1 to Q4) of the regulator, and a driving circuit (26) for the primary (32) of the driving transformer, the driving circuit including a full bridge formed by first and second sets (M5, M7; M6, M8) of driving FETS, each set formed by a complementary pair of FETS and being connected across the transformer primary, one FET of each set being driven ON to together form a series of conducting paths across the primary of the transformer in the absence of driving signals. The voltage supply for the driving FETs in the driving circuits of the primary (32) of the driving transformer includes a resistance (36) across which there is developed a voltage proportional to the current drawn by the driving transformer primary in each half cycle of its operation for reducing imbalance between the half cycles.

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