- 专利标题: Single-phase four-level inverter circuit topology and three-phase four-level inverter circuit topology
-
申请号: US15768552申请日: 2016-11-07
-
公开(公告)号: US10389271B2公开(公告)日: 2019-08-20
- 发明人: Hongliang Wang , Yan-Fei Liu
- 申请人: Hongliang Wang , Yan-Fei Liu
- 国际申请: PCT/CN2016/104941 WO 20161107
- 国际公布: WO2017/076367 WO 20170511
- 主分类号: H02M7/483
- IPC分类号: H02M7/483 ; H02M7/487
摘要:
A single-phase four-level inverter circuit topology and a three-phase four-level inverter circuit topology. The single-phase four-level inverter circuit topology is adapted to be used with two series-connected direct current power sources, so as to enable a first direct current power source or a second direct current power source to supply power to a load of the four-level inverter circuit topology, alternatively, any one of two direct current power sources is first algebraically superimposed with a flying capacitor and then supplies the power to the load of the four-level inverter circuit topology (M), thereby making the four-level inverter circuit topology output four different levels. The single-phase and three-phase four-level inverter circuit topologies reduce the system cost and volume by using a flying capacitor, the voltage utilization rate is three times that of the existing four-level inverter circuit topology under the same operating conditions, and the direct current side neutral point voltage can be balanced without requiring additional circuits.