公开(公告)号：US20190207599A1

公开(公告)日：2019-07-04

申请号：US16223590

申请日：2018-12-18

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Marius Mechlinski ,  Zhihui Yuan ,  Jingkui Shi ,  Stefan Schroeder

IPC: H03K17/0812 ,  G01R19/165 ,  G01R31/327

CPC classification number: H02M1/32 ,  H02M1/088 ,  H02M2001/325 ,  H03K17/0822 ,  H03K17/18 ,  H03K17/74 ,  H03K2217/0027

Abstract: Embodiments of the present disclosure relate to a detection device for a circuit comprising a plurality of switch devices coupled in series. The detection device comprises a plurality of detecting circuits, wherein each detecting circuit is integrated with a gate driver of a corresponding switch device. Each detecting circuit comprises a voltage divider and a signal processor. The voltage divider is coupled in parallel with the corresponding switch device and comprises a plurality of voltage dividing components coupled in series. The signal processor is coupled with one of the voltage dividing components and configured to receive a divided voltage across the voltage dividing component and output an output signal indicating the voltage across the switch device. Embodiments of the present disclosure also relate to a system and method for protecting series-connected switch devices.