Three Phase Induction Machine
 Representation of Field
Objective:
  To present a rotating vector representation of a rotating field pattern.
Steps:
For a 2-pole machine the field pattern, due to 3-phase stator currents, rotates as shown.
   
This can be represented as a rotating vector.
   
The length of the arrow can represent maximum flux density,
   
or "total field" or flux across the air gap.
 
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