PROSOFT MVI46-MBP模块ProSoft Technology 专业为大型自控产品供应商，如 Rockwell Automation 和 Schneider 电气等，开发通讯解决方案。

PROSOFT MVI46-MBP模块

PROSOFT MVI46-MBP模块

造成三菱变频器过电流故障的原因有很多，应该根据实际情况进行分析。如果找对根源，然后对根据故障情况对三菱变频器进行维修，一般都可以解决。电机电缆连接着变频器和电机。那就从变频器侧和电机侧分别进行分析。

1、首先是来自变频器侧的影响。

　　变频器侧可能造成三菱变频器过电流的常见原因有：

　　加速时间太短。此时所需要的电机转矩就越大，转矩与电流成正比，所以电流也很大。适当延长加速时间。

　　提升功能。如果在V/f控制时，起动过程中，电压提升过高，也可能造成过电流。适当降低电压提升值。

　　PID参数不合适。过高的动态响应，可能造成过电流。延长滤波时间，减P加I。

2、其次是来自电机侧的影响。

　　电机侧可能造成变频器过电流的常见原因有：

　　电机电缆对地短路。电缆绝缘不好，有破皮。可以用摇表对电缆绝缘进行检测，以确认电缆质量。

　　电机堵转。此时变频器会尝试使用更大的转矩让电机转动，可能造成过电流故障。

3、zui后是硬件问题。

　　如果变频器内部的电流检测机构工作不正常，或者CPU处理机制出了问题，这些都不是设参数就能解决的，需要报修。

　　如果变频器与电机电流不匹配，也可能造成过电流故障。比如小变频器带大电机，或者铭牌参数写错了，都可能造成过电流故障。

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