公开(公告)号：US20210058003A1

公开(公告)日：2021-02-25

申请号：US16546911

申请日：2019-08-21

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Zhituo Ni ,  Mehdi Narimani ,  Zhongyuan Cheng ,  Navid R. Zargari

IPC: H02M5/458 ,  H02M1/08 ,  H02M1/44

Abstract: Power conversion systems and methods to control a multiphase multilevel regenerative power converter with multilevel phase circuits that individually include multiple regenerative power stages with respective power stage outputs connected in series, the individual power stages comprising a DC link circuit a switching rectifier coupled between a respective transformer secondary circuit and the DC link circuit, and a switching inverter coupled between the DC link circuit and the respective power stage output, including a controller that provides inverter switching control signals to control the respective switching inverters, provides rectifier switching control signals to control the respective switching rectifiers, and controls a non-zero phase relationship between the rectifier switching control signals of the respective switching rectifiers.

公开(公告)号：US20220200479A1

公开(公告)日：2022-06-23

申请号：US17128358

申请日：2020-12-21

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Zhituo Ni ,  Mehdi Narimani ,  Zhongyuan Cheng ,  Navid R. Zargari

IPC: H02M7/483 ,  H02M5/458 ,  H02M1/12 ,  H02M7/5387

Abstract: Power conversion systems and methods to control a multiphase multilevel regenerative power converter with multilevel phase circuits that individually include multiple regenerative power stages with respective power stage outputs connected in series, each of the multiple regenerative power stages comprising a DC link circuit a switching rectifier coupled between a respective transformer secondary circuit and the DC link circuit, and a switching inverter coupled between the DC link circuit and the respective power stage output, including a controller that provides inverter switching control signals to control the respective switching inverters, provides rectifier switching control signals to control the respective switching rectifiers, and controls a non-zero phase relationship between the rectifier switching control signals of the respective switching rectifiers.

公开(公告)号：US11211879B2

公开(公告)日：2021-12-28

申请号：US16579498

申请日：2019-09-23

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Ahmed Hisham Abuelnaga ,  Zhituo Ni ,  Mehdi Narimani ,  Zhongyuan Cheng ,  Navid R. Zargari

IPC: H02M7/5387 ,  H02P21/22 ,  H02M1/14 ,  H02M5/458 ,  H02M7/483 ,  H02P27/06

Abstract: A power conversion system and controller configured to generate a real average DC current reference based on a DC bus voltage of a DC link circuit and a DC bus voltage setpoint, generate real and reactive ripple current references based on the DC bus voltage of the DC link circuit and a ripple angle of the DC link circuit, and generate rectifier switching control signals to operate rectifier switching devices based on the real average DC current reference and the real and reactive ripple current references.

公开(公告)号：US20250125705A1

公开(公告)日：2025-04-17

申请号：US18486473

申请日：2023-10-13

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Jiangang Hu ,  Zhituo Ni

IPC: H02M1/00 ,  H02M3/158 ,  H02M7/06 ,  H02P27/06

Abstract: A circuit includes a transistor configured to control pre-charging a charge storage device, and a diode coupled in parallel with the transistor. It also includes a shunt resistor coupled between the source of the transistor and a positive end of the charge storage device, an inductor coupled between the shunt resistor and the positive end of the charge storage device, and a current controller coupled to a gate of the transistor. The current controller is configured to receive a current measurement indicating an amount of current flowing through the transistor, process the current measurement to determine a switching duty cycle for the transistor, and to provide a signal to the gate of the transistor, the signal oscillating at the switching duty cycle. It also includes a power supply coupled with the source of the transistor and the drain of the transistor and configured to supply power to the current controller.

公开(公告)号：US11469685B2

公开(公告)日：2022-10-11

申请号：US17128358

申请日：2020-12-21

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Zhituo Ni ,  Mehdi Narimani ,  Zhongyuan Cheng ,  Navid R. Zargari

IPC: H02M7/00 ,  H02M7/483 ,  H02M5/458 ,  H02M7/5387 ,  H02M1/12 ,  H02M1/00

Abstract: Power conversion systems and methods to control a multiphase multilevel regenerative power converter with multilevel phase circuits that individually include multiple regenerative power stages with respective power stage outputs connected in series, each of the multiple regenerative power stages comprising a DC link circuit a switching rectifier coupled between a respective transformer secondary circuit and the DC link circuit, and a switching inverter coupled between the DC link circuit and the respective power stage output, including a controller that provides inverter switching control signals to control the respective switching inverters, provides rectifier switching control signals to control the respective switching rectifiers, and controls a non-zero phase relationship between the rectifier switching control signals of the respective switching rectifiers.