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close this bookElectrical Machines - Basic Vocational Knowledge (IBE - Deutschland; 144 pages)
View the documentIntroduction
Open this folder and view contents1. General information about electrical machines
Open this folder and view contents2. Basic principles
Open this folder and view contents3. Execution of rotating electrical machines
close this folder4. Synchronous machines
close this folder4.1. Operating principles
View the document4.1.1. Synchronous generator
View the document4.1.2. Synchronous motor
Open this folder and view contents4.2. Constructional assembly
Open this folder and view contents4.3. Operational behaviour
Open this folder and view contents4.4. Use of synchronous machines
Open this folder and view contents5. Asynchronous motors
Open this folder and view contents6. Direct current machines
Open this folder and view contents7. Single-phase alternating current motors
Open this folder and view contents8. Transformer
 

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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