公开(公告)号：EP2942863A4

公开(公告)日：2016-01-20

申请号：EP14783756

申请日：2014-01-09

Applicant: HUAWEI TECH CO LTD

Inventor： HU YANSHEN ,  TORRICO-BASCOPÉ GROVER VICTOR ,  FU DIANBO ,  LIU YUNFENG

IPC: H02M7/483 ,  H02M1/00 ,  H02M7/487 ,  H02M7/49

CPC classification number: H02M7/5395 ,  H02M1/12 ,  H02M7/487 ,  H02M7/49 ,  H02M2001/0064 ,  H02M2001/007

Abstract: Embodiments of the present invention provide a multi-level inverter and a power supply system, which relate to the field of electronics and can simplify a circuit structure. The multi-level inverter includes: two N-level inverter units, where pulse width modulation waves of the two N-level inverter units are staggered by a phase of 180 degrees, and N is an integer greater than or equal to 3; a direct current power source module, where an output end thereof is connected to input ends of the two N-level inverter units; a transformer, where the transformer includes a primary side and a secondary side, an inductor of the primary side and an inductor of the secondary side are coupled, and one end of the inductor of the primary side and one end of the inductor of the secondary side are connected to output ends of the two N-level inverter units respectively, so that the two N-level inverter units are reversely coupled, and the other end of the inductor of the primary side and the other end of the inductor of the secondary side are connected, so as to output W levels at a junction between the inductors, where W=2N-1; and a filter, where one end of the filter is connected to the junction between the two coupled inductors, and the other end of the filter is grounded. The multi-level inverter and the power supply system are configured to convert a direct current into an alternating current.