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6SL3352-1AH34-7CA0
6SL3352-1AH34-7CA0
如果在电压峰值时接通变压器,励磁电流是非常平稳的。在随后的1/4个周期里,电压从峰值下降,励磁电流上升到大值。
由于接着交流电压进入负半周,励磁电流就转头下降了。
但是如果在电压过零点接通变压器,会在随后的1/2周期里电压都是正值,励磁电流都在上升。
按照积分理论,电流的大值将会升高到前一种(正常)情况的2倍,由于铁芯不能承受2倍的磁通,很快进入磁饱和区,电感量迅速下降,实际电流就不是2倍了,而是要大得多,形成所谓的“励磁涌流”。
6SL3352-1AH34-7CA0
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