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大电流硅整流装置一般采用多只整流二极管或晶闸管并联。由于整流二极管的伏安特性不一致,且使用中特性往往会发生变化,造成并联二极管之间导电不平衡。并联元件个数越多,导电不平衡现象越明显,有时会损坏快速熔断器(以下称快熔)或整流二极管,严重时,甚至烧坏整个整流桥臂。因此,应经常检查整流二极管的均流度,发现问题及时处理,以保障硅整流装置的安全运行。测试整流桥臂中单只元件的电流,可采用直流钳形电流传感器及
Large current rectifier devices generally use more than one rectifier diode or thyristor in parallel. Due to the inconsistent volt-ampere characteristics of the rectifier diodes, the characteristics of the diodes in use tend to change, resulting in the imbalance of the conductivity between the parallel diodes. The more the parallel components, the more obvious the imbalance of conduction, sometimes damage the fast fuse (hereinafter referred to as fast melt) or rectifier diode, serious, or even burn the entire rectifier bridge arm. Therefore, the rectifier diode should always check the average flow, find the problem promptly deal with in order to protect the safe operation of the silicon rectifier. Test the current single bridge rectifier arm current can be used DC Clamp current sensor and