公开(公告)号：US09482704B2

公开(公告)日：2016-11-01

申请号：US14550200

申请日：2014-11-21

Applicant: ABB Technology AG

Inventor： Samuel Reist ,  Manuel Vetterli ,  Matthias Lüscher ,  Juerg Rauchenstein

IPC: G01R31/02 ,  G01R25/00 ,  G01R31/26

CPC classification number: G01R25/00 ,  G01R31/2632

Abstract: A method, a controller unit for a bridge rectifier, and a bridge rectifier system are disclosed for detecting a shorted diode in a bridge rectifier. The method can include determining a phase-to-phase voltage between two phase inputs of the bridge rectifier, wherein a phase input is provided between the two series connected diodes of the respective phase, and indicating a shorted diode fault by determining whether the phase-to-phase voltage is zero for more than a commutation time of the bridge rectifier.

Abstract translation: 公开了一种用于检测桥式整流器中的短路二极管的方法，用于桥式整流器的控制器单元和桥式整流器系统。 该方法可以包括确定桥式整流器的两相输入之间的相间电压，其中在相位的两个串联连接的二极管之间提供相位输入，并且通过确定相位输入是否相位来指示短路二极管故障， 桥式整流器的换向时间大于零时，相电压为零。