公开(公告)号：US10715056B2

公开(公告)日：2020-07-14

申请号：US16369828

申请日：2019-03-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fangcheng Liu ,  Kai Xin ,  Haibin Guo

IPC: H02M7/537 ,  H02M7/5387 ,  H02S40/32 ,  H02P27/08 ,  H02M1/12 ,  H02J3/38 ,  H03H7/01 ,  H02M7/5395 ,  H02M7/487 ,  H02M1/00

Abstract: A three-phase converter configured to be coupled between a direct current system and an alternating current system to perform interconversion between a direct current and an alternating current, where the three-phase converter includes a switching network, a three-phase filter coupled to the switching network, a sampling circuit coupled to the three-phase filter, a control circuit coupled to the three-phase sampling circuit, an active damping circuit coupled to the control circuit and the sampling circuit, and a modulation circuit coupled between the active damping circuit and the switching network, where the sampling circuit is configured to obtain three-phase currents in the three-phase filter, and send the three-phase currents to the active damping circuit, the active damping circuit is configured to obtain new three-phase modulated waves according to the three-phase currents, and transmit the new three-phase modulated waves to the modulation circuit.

公开(公告)号：US20190229646A1

公开(公告)日：2019-07-25

申请号：US16369828

申请日：2019-03-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fangcheng Liu ,  Kai Xin ,  Haibin Guo

IPC: H02M7/5387 ,  H02S40/32 ,  H02P27/08 ,  H03H7/01 ,  H02M1/12 ,  H02J3/38

Abstract: A three-phase converter configured to be coupled between a direct current system and an alternating current system to perform interconversion between a direct current and an alternating current, where the three-phase converter includes a switching network, a three-phase filter coupled to the switching network, a sampling circuit coupled to the three-phase filter, a control circuit coupled to the three-phase sampling circuit, an active damping circuit coupled to the control circuit and the sampling circuit, and a modulation circuit coupled between the active damping circuit and the switching network, where the sampling circuit is configured to obtain three-phase currents in the three-phase filter, and send the three-phase currents to the active damping circuit, the active damping circuit is configured to obtain new three-phase modulated waves according to the three-phase currents, and transmit the new three-phase modulated waves to the modulation circuit.

公开(公告)号：US09871466B2

公开(公告)日：2018-01-16

申请号：US14747744

申请日：2015-06-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Haibin Guo ,  Kai Xin ,  Li Lu

IPC: H02M7/537 ,  H02M7/5387 ,  H02M7/5395 ,  H02M1/00

CPC classification number: H02M7/537 ,  H02M7/53871 ,  H02M7/5395 ,  H02M2001/0032 ,  H02M2001/0054 ,  Y02B70/1491 ,  Y02B70/16

Abstract: An inverter control method, apparatus, and system are provided. The method in the embodiments of the present invention includes obtaining power distribution line graph of an inverter switch according to an output power and an input voltage that are of an inverter; when an area to which the inverter belongs is a first area and the inverter switch works at a second frequency, switching the inverter switch to a first frequency; and when the area to which the inverter belongs is a second area and the inverter switch works at the first frequency, switching the inverter switch to the second frequency. In the embodiments of the present invention, whether a working frequency of an inverter switch needs to be changed is determined according to an output power and an input voltage, which improves control efficiency, thereby effectively improving conversion efficiency of an inverter.

公开(公告)号：US20150381073A1

公开(公告)日：2015-12-31

申请号：US14747744

申请日：2015-06-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Haibin Guo ,  Kai Xin ,  Li Lu

IPC: H02M7/537

CPC classification number: H02M7/537 ,  H02M7/53871 ,  H02M7/5395 ,  H02M2001/0032 ,  H02M2001/0054 ,  Y02B70/1491 ,  Y02B70/16

Abstract: An inverter control method, apparatus, and system are provided. The method in the embodiments of the present invention includes obtaining power distribution line graph of an inverter switch according to an output power and an input voltage that are of an inverter; when an area to which the inverter belongs is a first area and the inverter switch works at a second frequency, switching the inverter switch to a first frequency; and when the area to which the inverter belongs is a second area and the inverter switch works at the first frequency, switching the inverter switch to the second frequency. In the embodiments of the present invention, whether a working frequency of an inverter switch needs to be changed is determined according to an output power and an input voltage, which improves control efficiency, thereby effectively improving conversion efficiency of an inverter.

Abstract translation: 提供了一种逆变器控制方法，装置和系统。 本发明实施例中的方法包括：根据反相器的输出功率和输入电压获得逆变器开关的配电线图; 当逆变器所属的区域是第一区域并且逆变器开关以第二频率工作时，将逆变器开关切换到第一频率; 并且当变频器所属的区域是第二区域并且逆变器开关以第一频率工作时，将逆变器开关切换到第二频率。 在本发明的实施例中，根据输出功率和输入电压来确定逆变器开关的工作频率是否需要改变，这提高了控制效率，从而有效地提高了逆变器的转换效率。