IC693APU301 亿佳似家
1 .单相变压器空载时的电流与主磁通不同相位，存在一个相位角度差aFe，因为存在铁耗电流。空载电流是尖顶波形，因为其中有较大的三次谐波。
2 .直流电机电枢绕组中流动的也是交流电流。但其励磁绕组中流的是直流电流。直流电动机的励磁方式有他励、并励、串励、复励等。
3 . 直流电机的反电势表达式为E =CE Fn；而电磁转矩表达式则为Tem =CTFI。
4 .直流电机的并联支路数总是成对的。而交流绕组的并联支路数则不。
5 .在直流电机中，单叠绕组的元件是以一个叠在另外一个之上的方式，串联而成的。无论是单波绕组、还是单叠绕组，换向片将所有元件串联在一起、构成了一个单一的闭合回路。
6 .异步电机又称感应电机，因为异步电机的转子电流是通过电磁感应而产生的。
7 .异步电动机降压起动时，起动转矩减小，起动转矩和绕组的起动电流的平方成正比地减小。
8 .侧电压的幅值、频率不变时，变压器的铁心的饱和程度是基本不变的，励磁电抗也基本不变。
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