公开(公告)号：US20240348152A1

公开(公告)日：2024-10-17

申请号：US18280336

申请日：2022-12-28

申请人： SHANDONG JIANZHU UNIVERSITY

发明人： Changwei QIN ,  Xiaoyan LI ,  Zhiyuan CHU ,  Hongliang ZHANG ,  Yanfeng LI

IPC分类号： H02M1/12 ,  H02M1/088 ,  H02M7/487 ,  H02M7/5395

CPC分类号： H02M1/123 ,  H02M1/088 ,  H02M7/487 ,  H02M7/5395

摘要： A common-mode voltage suppression method includes: selecting two large and two small vectors with low common-mode voltage magnitudes as basic voltage vectors; writing a volt-second balance equation according to a selected basic voltage vectors, and calculating, an introduced distribution factor of duty cycles of small vectors, initial values of distribution factors of a duty cycle of each basic voltage vector and of small vectors; designing a neutral-point voltage balance controller to obtain and utilize a corrected value of the distribution factor of the duty cycles of the small vectors and the initial values and combine with a set neutral-point voltage balance control threshold to update the duty cycle of each basic voltage vector; and inserting shoot-through states into the small vectors, designing a switching sequence, converting the sequence into a driving signal of a power switch, and controlling an operation of the quasi-Z-source simplified three-level inverter.