公开(公告)号：US20210325478A1

公开(公告)日：2021-10-21

申请号：US16849230

申请日：2020-04-15

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Jiangang Hu ,  Brian P. Brown ,  Lixiang Wei ,  Andrew J. Roberts

IPC: G01R31/52 ,  G01R31/327 ,  G01R31/42

Abstract: A power conversion system includes a sensing circuit to sense a system voltage of a DC bus circuit with a first DC bus terminal with a first voltage positive relative to a second voltage of a second DC bus terminal. The sensing circuit includes a first capacitor having a first terminal coupled to the second DC bus terminal, and a second terminal; a second capacitor having a first terminal coupled to the second terminal of the first capacitor, and a second terminal coupled to a reference node; and a resistive divider circuit coupled across the first capacitor and having an output terminal that delivers a voltage signal corresponding to a voltage across the first capacitor.

公开(公告)号：US11025052B2

公开(公告)日：2021-06-01

申请号：US15876287

申请日：2018-01-22

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Andrew J. Roberts ,  Yogesh P. Patel ,  Jiangang Hu ,  Lixiang Wei

IPC: H02H7/125 ,  H02H7/122 ,  H02M1/36 ,  H02H1/00 ,  H02M1/32 ,  H02H7/12 ,  H02P27/06 ,  H02M5/458 ,  H02M7/219

Abstract: Power converters, protection systems and methods to protect a precharge circuit in which a precharge resistor voltage is indirectly monitored during a normal operating mode, and a rectifier and an inverter are selectively disabled in response to the indirectly measured precharge resistor voltage indicating a fault in a precharge circuit SCR.

公开(公告)号：US20190229521A1

公开(公告)日：2019-07-25

申请号：US15876287

申请日：2018-01-22

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Andrew J. Roberts ,  Yogesh P. Patel ,  Jiangang Hu ,  Lixiang Wei

IPC: H02H7/125 ,  H02H7/122 ,  H02H1/00 ,  H02M1/36

Abstract: Power converters, protection systems and methods to protect a precharge circuit in which a precharge resistor voltage is indirectly monitored during a normal operating mode, and a rectifier and an inverter are selectively disabled in response to the indirectly measured precharge resistor voltage indicating a fault in a precharge circuit SCR.