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Speed Of The Physical Rotor

Posted by: tanujagdale on Wed, 01/30/2019

Why The Speed Of The Physical Rotor And The Speed Of The Rotating Magnetic Field In The Stator Must Be Different?

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Submitted by PI-MrScott on Thu, 01/31/2019

The mechanical speed (speed of the physical rotor) and electrical speed (speed of rotating of magnetic field) are related as a function of the number of poles/pole-pairs. For example, in a 2-pole motor, one magnetic rotation (one flux cycle for the stator windings) will correspond to one mechanical rotation (one physical stator cycle). In a 4-pole motor, two magnetic rotations will correspond to one mechanical rotation. The relationship between the two is defined as follows: electrical speed is equal to the mechanical speed multiplied to half of the number of poles.