公开(公告)号：US20240088800A1

公开(公告)日：2024-03-14

申请号：US17932079

申请日：2022-09-14

申请人： VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.

发明人： Boran Fan ,  Dushan Boroyevich ,  Rolando Burgos ,  Jayesh Kumar Motwani ,  Jun Wang

IPC分类号： H02M7/483 ,  H02M1/00 ,  H02M7/5395

CPC分类号： H02M7/4835 ,  H02M1/0043 ,  H02M7/5395

摘要： Aspects of switching-cycle voltage deviation control for modular multilevel converters (MMCs) are described. In one example, an upper switching action of an upper power cell is determined within a time duration of a switching cycle for an MMC. In addition, a lower switching action of a lower power cell is determined within the time duration of the switching cycle for the MMC. In addition, a delay is generated between the upper switching action and the lower switching action to reduce capacitor voltage deviation between the upper power cell and the lower power cell during the switching cycle. The upper power cell is located in an upper arm of a phase leg of the MMC, while the lower power cell is located in a lower arm of the phase leg of the MMC.

公开(公告)号：US20240097572A1

公开(公告)日：2024-03-21

申请号：US17932399

申请日：2022-09-15

申请人： VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.

发明人： Yuliang Cao ,  Yijie Bai ,  Vladimir Mitrovic ,  Boran Fan ,  Dong Dong ,  Rolando Burgos

IPC分类号： H02M3/335 ,  H02M1/08

CPC分类号： H02M3/33573 ,  H02M1/08

摘要： Power systems including converters that exhibit reduced common mode voltage emissions are described. In one example, a power converter system includes an input and an output, a multi-level switch bridge coupled between the input and the output, an input capacitor branch coupled across the input, an output capacitor branch coupled across the output, and a controller configured to generate switching control signals for the multi-level buck-boost switch bridge. The multi-level switch bridge also includes a plurality of inductors in one example. In one case, a quadrangular or quadrangle control mode can be relied upon to switch the multi-level switch bridge, to minimize the ripple in the inductors, achieve zero voltage switching, reduce common mode electromagnetic interference emission by the converter, and for other benefits.