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FBM204电缆P0916DC
- 更新时间：2025-04-19
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已收藏FBM204电缆P0916DC
这是已确定原因是外部原因的VFD中的常见故障。导致这一挑战的一些外部因素是交流电源线中的瞬时电压尖峰以及由连接的机器惯性引起的检修负载。这种情况会导致连接的负载保持旋转速度超过驱动电动机指定的速度。发生这种情况时，VFD将通过触发高直流故障跳闸并关闭连接到逆变器侧电路的IGBT来保护其内部组件。
如果诊断显示器的交流变频器中有极端总线故障的迹象，请确保机器有稳定的交流电源，并在由VFD控制的减速时间电机上工作，等于连接的负载。如果VFD用于需要快速减速的应用，则可以使用动态制动来保护VFD免受极端总线故障的影响。
原因4：高启动电流
VFD显示屏读数上的高启动电流可能表明处理速度或连接负载发生了意外变化。
为了说明这一点，VFD控制的泵和风扇的功率要求与其转速立方体成比例地增加，如果VFD负载以略高于预期的速度运行，将导致VFD过载。
为了保护VFD免受这种过载的影响，请在启动VFD驱动器之前对其进行测试和检查。例如，在按下启动之前卸载传送带，以避免 VFD 负载的任何部分受潮和碎屑。
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