公开(公告)号：US20160156276A1

公开(公告)日：2016-06-02

申请号：US14555956

申请日：2014-11-28

Applicant: General Electric Company

Inventor： Zhihui Yuan ,  Qingyun Chen ,  Stefan Schroeder ,  Jie Shen

IPC: H02M5/44

CPC classification number: H02M5/44 ,  H02M1/36 ,  H02M5/45 ,  H02M7/483 ,  H02M2007/4835

Abstract: An electrical circuit for a power converter includes a first switching device proximate an AC source. The circuit also includes a voltage measurement device proximate a DC link and extends between the AC source and the DC link. The circuit further includes a DC voltage source and a first capacitive device. The first capacitive device is positioned between the first switching device and the voltage measurement device. The circuit further includes a second switching device positioned between the first capacitive device and the voltage measurement device. The circuit also includes a controller operatively coupled to the DC voltage source, the voltage measurement device, and the switching devices. The controller is configured to open the second switching device when a measured voltage signal generated by the voltage measurement device is substantially representative of a reference voltage value.

Abstract translation: 用于功率转换器的电路包括靠近AC电源的第一开关装置。 电路还包括靠近DC链路的电压测量装置，并且在AC源和DC链路之间延伸。 电路还包括直流电压源和第一电容性装置。 第一电容器件位于第一开关器件和电压测量器件之间。 该电路还包括位于第一电容性装置和电压测量装置之间的第二开关装置。 电路还包括可操作地耦合到DC电压源，电压测量装置和开关装置的控制器。 当由电压测量装置产生的测量电压信号基本上代表参考电压值时，控制器被配置为打开第二开关装置。

公开(公告)号：US10732685B2

公开(公告)日：2020-08-04

申请号：US14633296

申请日：2015-02-27

Applicant: General Electric Company

Inventor： Zhihui Yuan ,  Stefan Schroeder ,  Qingyun Chen ,  Jie Shen ,  Nora Cheng-Huei Han

IPC: G06F1/26 ,  H02M7/483 ,  G06F1/3209 ,  G06F1/3212 ,  G06F1/3287 ,  H02M1/00

Abstract: A method of operating a multilevel power converter includes using, through a processing device, a model of an electrical circuit that includes a plurality of switching devices, a plurality of flying capacitors, and an AC terminal. The method also includes regulating a voltage level of the AC terminal through selecting, at least partially based on the model, a possible charging state of the electrical circuit. Each possible switching state has a voltage level that at least partially corresponds to a commanded voltage level for the AC terminal. The method further includes selecting, at least partially based on the model of the electrical circuit and at least partially based on the selected possible switching state, a charging state from a plurality of possible charging states. The method also includes setting the switching state of the electrical circuit at least partially based on the selected charging state of the electrical circuit.

公开(公告)号：US09537416B2

公开(公告)日：2017-01-03

申请号：US14555956

申请日：2014-11-28

Applicant: General Electric Company

Inventor： Zhihui Yuan ,  Qingyun Chen ,  Stefan Schroeder ,  Jie Shen

IPC: H02M5/45 ,  H02M5/44 ,  H02M1/36 ,  H02M7/483

CPC classification number: H02M5/44 ,  H02M1/36 ,  H02M5/45 ,  H02M7/483 ,  H02M2007/4835

Abstract: An electrical circuit for a power converter includes a first switching device proximate an AC source. The circuit also includes a voltage measurement device proximate a DC link and extends between the AC source and the DC link. The circuit further includes a DC voltage source and a first capacitive device. The first capacitive device is positioned between the first switching device and the voltage measurement device. The circuit further includes a second switching device positioned between the first capacitive device and the voltage measurement device. The circuit also includes a controller operatively coupled to the DC voltage source, the voltage measurement device, and the switching devices. The controller is configured to open the second switching device when a measured voltage signal generated by the voltage measurement device is substantially representative of a reference voltage value.

Abstract translation: 用于功率转换器的电路包括靠近AC电源的第一开关装置。 电路还包括靠近DC链路的电压测量装置，并且在AC源和DC链路之间延伸。 电路还包括直流电压源和第一电容性装置。 第一电容器件位于第一开关器件和电压测量器件之间。 该电路还包括位于第一电容性装置和电压测量装置之间的第二开关装置。 电路还包括可操作地耦合到DC电压源，电压测量装置和开关装置的控制器。 控制器被配置为当由电压测量装置产生的测量电压信号基本上代表参考电压值时，打开第二开关装置。

公开(公告)号：US09246407B2

公开(公告)日：2016-01-26

申请号：US13853335

申请日：2013-03-29

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Stefan Schroeder ,  Qingyun Chen

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

CPC classification number: H02M7/483 ,  H02M7/487 ,  H02M2001/0009 ,  H02M2001/0012

Abstract: A method of operating a flying capacitor multilevel converter having a direct current link and a plurality of phase legs each having a plurality of flying capacitors includes employing redundant states to balance flying capacitor voltages by charging or discharging flying capacitors. The redundant states are employed by obtaining a load current of the flying capacitor multilevel converter. If a load current value is lower than a threshold value then a capacitor current of a phase terminal capacitor is utilized to determine redundant states else a load current direction is utilized to determine the redundant states.

Abstract translation: 一种操作具有直流连接的多电容多电平转换器和多个相位支路的方法，每个具有多个飞行电容器包括采用冗余状态来通过对飞行电容器进行充电或放电来平衡飞跨电容器电压。 通过获得飞行电容器多电平转换器的负载电流来采用冗余状态。 如果负载电流值低于阈值，则使用相位端子电容器的电容器电流来确定冗余状态，否则利用负载电流方向来确定冗余状态。

公开(公告)号：US20160252941A1

公开(公告)日：2016-09-01

申请号：US14633296

申请日：2015-02-27

Applicant: General Electric Company

Inventor： Zhihui Yuan ,  Stefan Schroeder ,  Qingyun Chen ,  Jie Shen ,  Nora Cheng-Huei Han

IPC: G06F1/26 ,  G06F1/32

Abstract: A method of operating a multilevel power converter includes using, through a processing device, a model of an electrical circuit that includes a plurality of switching devices, a plurality of flying capacitors, and an AC terminal. The method also includes regulating a voltage level of the AC terminal through selecting, at least partially based on the model, a possible charging state of the electrical circuit. Each possible switching state has a voltage level that at least partially corresponds to a commanded voltage level for the AC terminal. The method further includes selecting, at least partially based on the model of the electrical circuit and at least partially based on the selected possible switching state, a charging state from a plurality of possible charging states. The method also includes setting the switching state of the electrical circuit at least partially based on the selected charging state of the electrical circuit.

Abstract translation: 一种操作多电平电力转换器的方法包括通过处理装置使用包括多个开关装置，多个飞行电容器和AC端子的电路的模型。 该方法还包括通过至少部分地基于该模型来选择电路的可能的充电状态来调节AC端子的电压电平。 每个可能的开关状态具有至少部分对应于AC端子的指令电压电平的电压电平。 该方法还包括至少部分地基于电路的模型并且至少部分地基于所选择的可能的切换状态来选择来自多个可能的充电状态的充电状态。 该方法还包括至少部分地基于所选择的电路的充电状态来设置电路的开关状态。