IC693CPU366

IC693CPU366 变频器驱动的电机受到尖峰电压的冲击后，它的实际寿命与很多因素，包括，温度、污染、振动、电压、载波频率以及线圈绝缘的工艺等因素有关。

变频器的载波频率越高，输出电流波形越接近正弦波，这会降低电机的运行温度，从而延长绝缘的寿命。但是，更高的载波频率意味着每秒钟产生的尖峰电压数量更多，对电机的冲击的次数更多。图4给出了绝缘寿命随着电缆长度与载波频率的变化。从图中可知，对于200英尺长的电缆，当载波频率从3kHz提高到12kHz（变化4倍）时，绝缘的寿命从大约8万小时降低到2万小时

IC693CPU366

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IC693CPU366