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).
一个交流的权力中心由一个可控硅功率控制器或控制器的外壳，包装一或无电压匹配变压器。
An ac power center consists of a SCR power controller or controllers, packaged in an enclosure with or without voltage matching transformers.
加热器由外壳，设于外壳内的加热丝，以及与加热丝依次连接的开关、变压器、电源插头构成。
The heater is composed of a housing, a heating filament arranged in the housing, and a switch, a transformer and a power plug sequentially connected with the heating filament.
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