4.1.2. Synchronous motor
In a motor stator - given the simplest contingency - a rotating field is yielded by three coils displaced within 120 degrees through which current flows from three streams displaced over 120 degrees. Where there is a field spider of a synchronous machine in the rotating field, force actions make themselves felt between the north pole of the rotating field and the south pole of the field spider resp. between the south pole of the rotating field and the north pole of the field spider. One could imagine rubber threads (field lines) strung up between the rotating field and the field spider.
The rotating field propels the field spider and both run at the same speed. This is why the motor is called a synchronous motor.
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