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    Half bridge inverter units and inverter thereof
    5.
    发明授权
    Half bridge inverter units and inverter thereof 有权

    公开(公告)号：US10277146B2

    公开(公告)日：2019-04-30

    申请号：US15547005

    申请日：2016-01-29

    申请人： Hongliang Wang ,  Yan-Fei Liu

    发明人： Hongliang Wang ,  Yan-Fei Liu

    IPC分类号： H02M7/797 ,  H02M3/155 ,  H02J3/38

    摘要： Disclosed are half bridge inverter unit and inverter thereof. The half bridge inverter unit includes an inverter controlling module and inductors. The inverter controlling module provides different connection modes based on different operation modes so that the inverter meets the requirement of wide input voltage range as it can work in either voltage step-up mode or voltage step-down mode. The mid-point voltage between the DC series capacitors connected in parallel with DC power supply can be balanced automatically by taking advantage of the grid voltage symmetry with regard to positive and negative half cycles. The inverter is of single stage structure. It has advantages of low power loss, low cost, high efficiency and reliability.

    Single-Phase Four-Level Inverter Circuit Topology and Three-Phase Four-Level Inverter Circuit Topology
    6.
    发明申请
    Single-Phase Four-Level Inverter Circuit Topology and Three-Phase Four-Level Inverter Circuit Topology 审中-公开

    公开(公告)号：US20180309384A1

    公开(公告)日：2018-10-25

    申请号：US15768552

    申请日：2016-11-07

    申请人： Hongliang Wang ,  Yan-Fei Liu

    发明人： Hongliang Wang ,  Yan-Fei Liu

    IPC分类号： H02M7/483

    CPC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.

    Five-level topology units and inverter thereof
    8.
    发明申请
    Five-level topology units and inverter thereof 审中-公开
    五级拓扑单元及其逆变器

    公开(公告)号：US20150333522A1

    公开(公告)日：2015-11-19

    申请号：US14690761

    申请日：2015-04-20

    申请人： Hongliang Wang ,  Yanfei Liu

    发明人： Hongliang Wang ,  Yanfei Liu

    IPC分类号： H02J3/38 ,  H02M7/537 ,  H02J7/00

    CPC分类号： H02M7/537 ,  H02M7/217 ,  H02M7/219 ,  H02M7/483 ,  H02M7/487 ,  Y10T307/50

    摘要： Disclosed are five-level topology units and inverter thereof without an extra boosting circuit wherein the cost is reduced by using only one AC filtering inductor and high efficiency is achieved for the absence of the extra boosting circuit and, furthermore, wherein the leakage current is eliminated substantially by using the half-bridge inverter module. The five-level inverter including the five-level topology unit without an extra circuit to raise input voltage (i.e. Boost circuit) is able to output the same AC power as the five-level full bridge inverter under the same working condition.

    摘要翻译： 公开了五级拓扑单元及其逆变器，而没有额外的升压电路，其中通过仅使用一个AC滤波电感器来降低成本，并且为了不存在额外的升压电路而实现高效率，此外，其中漏电流被消除 基本上通过使用半桥逆变器模块。 具有不增加输入电压的额外电路（即Boost电路）的五电平拓扑单元的五电平逆变器能够在相同工作条件下输出与五电平全桥逆变器相同的AC电力。

    Single-phase four-level inverter circuit topology and three-phase four-level inverter circuit topology
    9.
    发明授权
    Single-phase four-level inverter circuit topology and three-phase four-level inverter circuit topology 有权

    公开(公告)号：US10389271B2

    公开(公告)日：2019-08-20

    申请号：US15768552

    申请日：2016-11-07

    申请人： Hongliang Wang ,  Yan-Fei Liu

    发明人： Hongliang Wang ,  Yan-Fei Liu

    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.

    Five-level half bridge inverter topology with high voltage utilization ratio
    10.
    发明授权
    Five-level half bridge inverter topology with high voltage utilization ratio 有权

    公开(公告)号：US10312825B2

    公开(公告)日：2019-06-04

    申请号：US15751329

    申请日：2016-08-15

    申请人： Hongliang Wang ,  Yan-Fei Liu

    发明人： Hongliang Wang ,  Yan-Fei Liu

    IPC分类号： H02M7/5387 ,  H02M7/487 ,  H02M7/483 ,  H02S40/32

    摘要： A single phase five-level inverter topology comprising a half-bridge inverter circuit with a floating capacitor which outputs five mutually different voltage levels including zero, wherein both the system cost and the size is reduced, the leakage current is eliminated substantially and high efficiency is achieved by using five-level half-bridge structure with only one AC filtering inductor. A three-phase five-level inverter topology wherein the voltage utilization is twice that of the present three-phase five-level half-bridge inverter under the same operating conditions; the AC filtering inductance is smaller than that of the three-level half-bridge inverter; the DC link mid-point voltage can be balanced without additional circuitry.