9V 600ma变压器可以用9V 800ma的变压器替代么？
推荐回答（5个）
可以.只要变压器的输出电流大于或等于原来的变压器的输出电流都是可以的．有个前提条件：电压相等．电源形式相同．
兄弟我给你算算看啊:110V输入9V输出600MA,铁心面积=4.7CM2,初级绕组线径0.10MM线,957.44匝,功率110*0.049=5.4W.次级线径1.16MM线,82.25匝,功率9*600=5.4W
220输入9V输出800MA:铁心面积=5.366CM2,初级绕组线径0.08MM线,1677.22匝.功率220*0.0327=7.2W 次级线径0.38MM线,72.03匝,功率9*800=7.2W
由此可见220V输入的变压器的输出功率更大,
其实这与输入电压没有关系的,只要输出电压一致,电流够大就可以的.
我可是用了半个多小时给你计算的哦.没有别的只是不希望你被别人误导.呵呵!
不可以。
为了计算简单我们可以把9V认为为交流电，可以算出9V 600ma变压器（110市电）的变比为110/9=12倍，这样变压器原变的额定（或者说是最大）电流为600/12=50mA.同样可以得出我有一个9V 800ma变压器（220市电）的原边额定电流为33mA。
两者有什么区别呢？简单的说就是9V 600ma变压器（110市电）变压器的原边要比9V 800ma变压器（220市电）的要粗，能承受电流的能力要强。原变压器的原边是工作在最大电流为50mA的，用一个33mA的可能会使其发热，影响电源的工作甚至于烧毁。
当然变压器的设计是有余地的，只要工作是发热不是很厉害还是可以凑活用的，但严谨的说不推荐
可以替换，但是要看一看直流输出的极性和插头形状是否一样，不一样的话要进行简单的改装。
完全可以使用，注意输出极性一致即可。800MA的变压器容量大于前者，工作更轻松。
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