Switched mode power supply with reduced reflected power

Details Switched mode power supply with reduced reflected power Switched mode power supply with reduced reflected power

1999-06-08

2000-07-04

Berhane, Adolf Deneke

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 97, 363131, H02M 3335, H02M 324

Patent

active

060847840

ABSTRACT:
A switched mode power supply includes a transformer having a primary winding and a secondary winding. A primary current flows through the primary winding during a first time period and a secondary current flows through the secondary winding during a second time period. A first switching device is connected in series to the primary winding, and a second switching device is connected in series to the secondary winding. In addition, the power supply includes primary and secondary control units. The secondary-side control unit switches the second switching device to control the power supply output by changing the energy returning back to the transformer during the second period of time. The primary-side control unit switches the first switching device to limit the supplied energy supplied by the transformer during the first period of time toward the input of the switched mode power to a predetermined value. This eliminates the need for transmission of a control signal from the secondary side to the primary side where DC decoupling is necessary.

REFERENCES:
patent: 3986097 (1976-10-01), Woods
patent: 4901215 (1990-02-01), Martin-lopez
patent: 5303138 (1994-04-01), Rozman
patent: 5745359 (1998-04-01), Faulk
patent: 5764495 (1998-06-01), Faulk

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