Synchronous Electric Motors Quiz

A synchronous electric motor operates in such a way that the rotation of the shaft is synchronized with the frequency of the supply current. The rotation period is exactly equal to an integral number of AC cycles.

Electromagnets are used in the stator of a synchronous motor to create a magnetic field that rotates in time with the oscillations of the current.

A synchronous motor is termed doubly fed if it is supplied with independently excited multiphase AC electromagnets on both the rotor and stator.

<p>The rotor of a synchronous motor with permanent magnets or electromagnets turns in step with the stator field at the same rate, providing the second synchronized rotating magnet field.</p> Signup and view all the answers

<p>Synchronous motors do not rely on induction to produce the rotor's magnetic field, rotating at a rate locked to the line frequency. In contrast, induction motors require slip, with the rotor rotating at a frequency slightly slower than the AC alternations to induce current.</p> Signup and view all the answers