特斯拉的发明本质上就是一个旋转的变压器。
尼古拉·特斯拉发明的感应电动机本质上就是一台旋转变压器——首先在电动机的固定钢制外壳（定子）上安装上绕组，然后将导体安装入内轴（转子）。
Tesla's invention is, in essence, a rotating transformer. Its primary windings reside in a stationary steel casing (the stator) and and secondary conductors are attached to an inner shaft (the rotor).
通过1888年，特斯拉举行交流多项专利电动机，发电机，变压器和输电系统。
By 1888, Tesla held several patents on AC motors, generators, transformers, and transmission systems.
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