变频器是由电力电子器件、微电子元件、单片处理器等组成。为了能长期、可靠、安全地运行，特别要注意以下几项：(1)电压的影响 变频器的额定电流IN是指在输入额定电压UN下的可达到的最大电流值。实际电网的电压不一定是标准的，往往高于额定电压，这时必须相应修正允许额 Inverter is composed of power electronics, microelectronic components, single-chip processor. In order to run long-term, reliable and safe, with particular attention to the following: (1) the impact of voltage The inverter rated current I  N is the maximum current value can be reached at the input voltage U  N. The actual grid voltage is not necessarily the standard, often higher than the rated voltage, then the corresponding allowance must be amended