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假设我们的铁芯变压器电路如下图所示，变压器输入电压为 ，次级带了一个负载 ：

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一般情况下，我们总是倾向于提高变压器的耦合系数，在高磁导率铁芯的配合下，我们可以把两级绕组紧密交链的变压器，近视地看成全耦合变压器。因为对线圈的感值没有要求，比理想变压器（无限感值）有更广泛的应用。

Of the numerous thrilling accounts of life during the trenches beneath fireplace that were printed in the last calendar year or two, none is more vivid and stirring for read more the blood when compared to the story in the practical experience of the hardy son of the Blue Grass State who made a decision in Oct, 1915, that being free, white, and twenty-1, it had been his manifest obligation to strike a blow for democracy. So he traveled in warm haste to Canada and enlisted in the Canadian Grenadier Guards.

铁损是交变磁场在铁芯上产生的损耗，又分为涡流损耗和磁滞损耗两种，其大小与电压和频率相关较大，跟负载关系不大，即使空载，铁损也是一直存在的，所以铁损又叫空载损耗。

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その後、江戸時代初期に、利根川東遷事業（とねがわとうせんじぎょう）と呼ばれる河川改修が行われ、内海の大部分は陸地になり、現在の利根川流域になりました。

变压器一般是由两个（或多个）磁耦合线圈组成的四端器件。如下电路图，直接与电压源相连接的线圈称为一次绕组（原边），而与负载相连接的线圈称为二次绕组（副边）。