Universal Motor

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Construction Of Universal Motor

construction of universal motor
Construction of a universal motor is very similar to the construction of a DC machine.  
It consists of a stator on which field poles are mounted.
 Field coils are wound on the field poles.
However, the whole magnetic path (stator field circuit and also armature) is laminated. Lamination is necessary to minimize the eddy currents which induce while operating on AC.
The rotary armature is of wound type having straight or skewed slots and commutator with brushes resting on it. 
The commutation on AC is poorer than that for DC. because of the current induced in the armature coils. For that reason brushes used are having high resistance.

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