公开(公告)号：US20220115957A1

公开(公告)日：2022-04-14

申请号：US17558922

申请日：2021-12-22

Applicant: US Gov't as represented by Secretary of Air Force

Inventor： Nathaniel Smith

IPC: H02M3/335 ,  H02M1/32

Abstract: A galvanic isolator circuit and method provide for galvanically isolating and current limiting a power source from a load. A direct current (DC) input voltage (“vin”) and an input current (“iin”) are received. A full- or half-bridge rectifier is switched to synthesize a first alternating voltage waveform that magnetically couples through a transformer to induce a second alternating voltage waveform with galvanic isolation from the first alternating voltage waveform, preventing potentially-faulted load from a source. The second alternating voltage waveform is rectified to produce a direct current (DC) output voltage (“vo”) having output current (“io”) through more than one drive transistor or diode. The more than one primary-side drive transistor is current limited to reduce or prevent brown-out, black-out, or protective race conditions in the non-faulted portions of DC power generation systems and DC distribution electrical power systems.

公开(公告)号：US20200244157A1

公开(公告)日：2020-07-30

申请号：US16702608

申请日：2019-12-04

Applicant: US Gov't as represented by Secretary of Air Force

Inventor： Nathaniel Smith

IPC: H02M1/32 ,  H02M3/155 ,  H02M1/08

Abstract: A galvanic isolator circuit and method provide for galvanically isolating and current limiting a power source from a load. A direct current (DC) input voltage (“vin”) and an input current (“iin”) are received. A full-bridge rectifier is soft switched to synthesize a first alternating voltage waveform that magnetically couples through a transformer to induce a second alternating voltage waveform with galvanic isolation from the first alternating voltage waveform, preventing potentially-faulted load from a source. The second alternating voltage waveform is rectified to produce a direct current (DC) output voltage (“vo”) having output current (“io”) through more than one drive transistor. The more than one drive transistor is current limited to reduce or prevent brown-out, black-out, or protective race conditions in the non-faulted portions of DC power generation systems and DC distribution electrical power systems.