395B电铲直流母线过压或欠压故障分析

摘要

395电铲直流母线过压或欠压故障主要有：能量回馈电路开路，整流再生部分可控硅工作不正常，电压电流反馈回路出现问题，母线电压零伏设置点不正确，逆变器的LEM电路出现故障，变频器电路接地，逆变器电路器件损坏，变频器电源电压过低，文章详细阐述了导致395B电铲出现直流母线过压或欠压故障的具体原因及解决办法。%395B shovel DC-BUS overvoltage or undervoltage faults include that energy feedback circuit, not normal rectification and regeneration of partially controlled silicon, problems of voltage and current feedback loop, not correct bus voltage zero volt set point, inverter LEM circuit fault, frequency converter circuit grounding, inverter circuit device damage, low inverter power supply voltage. The article elaborates the causes and resolving methods of 395B shovel DC-BUS overvoltage or undervoltage fault.