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The stator usually forms the casing and houses a set of permanent magnets .

定子通常组成外壳，内部装有一组永久磁铁。

Such machines are known as asynchronous motors , because the rotor 's magnetic field never catches up with the stator 's field .

这样的设备被称为异步电动机，因为转子的磁场总是滞后于定子的磁场。

Modern induction motors usually have three ( or more ) sets of stator windings , each using a different phase of the alternating current being applied .

现代的感应电动机通常具有三组（或者更多）的定子绕组，每组各自使用不同相位的交流电来驱动。

An alternating current applied to the stator 's windings creates a rotating magnetic field , while simultaneously inducing a current in the separate conductors attached to the rotor .

交流电通过定子线圈创造旋转磁场，导致镶在转子上的独立导体同时产生感应电流。

Modern ac induction motors usually have three ( or more ) sets of stator windings , which smooths things out and allows more torque to be generated .

现代交流感应发动机通常有三组（或更多）定子线圈，使各程序平稳，并允许生成更多扭转力。