I looked for some explanations online but I honestly dont understand anything at all 🙁
In: Engineering
A synchronous motor is called that because its shaft/rotor turns at an integral multiple of the AC current coming in. If the current is 60 Hz, for example, a motor might spin at 60 Hz, or 30, or 120, etc. Depends on the coil and magnet configurations.
The easiest way to do this is to use permanent magnets on the rotor. They move due to the changing magnetic field from the stator’s coils, which changes with the line frequency.
Such motors can be handy for some applications, but their speed depends on the line frequency being stable, which it often isn’t quite. Years ago it was common for electric clocks to use synchronous motors with gear reduction. They would usually keep pretty good time, but not great. A crystal-stabilized clock is much better.
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