| 发明名称 | Detecting shorted diodes | ||
| 摘要 | 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. | ||
| 申请公布号 | US9482704(B2) | 申请公布日期 | 2016.11.01 |
| 申请号 | US201414550200 | 申请日期 | 2014.11.21 |
| 申请人 | ABB Schweiz AG | 发明人 | Reist Samuel;Vetterli Manuel;Lüscher Matthias;Rauchenstein Juerg |
| 分类号 | G01R31/02;G01R25/00;G01R31/26 | 主分类号 | G01R31/02 |
| 代理机构 | Taft Stettinius & Hollister LLP | 代理人 | Taft Stettinius & Hollister LLP |
| 主权项 | 1. A method for detecting a shorted diode in a bridge rectifier having two series-connected diodes for each phase of the bridge rectifier, the method comprising: determining a phase-to-phase voltage (Vab, Vbc, Vca) between two phase inputs of the bridge rectifier; providing a phase input between the two series-connected diodes of each respective phase; determining whether the phase-to-phase voltage is zero for more than a commutation time of the bridge rectifier; and indicating a shorted diode fault when the phase-to-phase voltage is zero for more than the commutation time of the bridge rectifier. | ||
| 地址 | Baden CH | ||