Induction Motors Drives
Three phase induction motors are commonly used is adjustable-speed drives and they have three-phase stator and rotor windings.
The speed of the rotation of
the field is called synchronous speed
Three phase induction motors are commonly used is adjustable-speed drives and they have three-phase stator and rotor windings.
The
stator windings are supplied with balanced three-phase ac voltages, which produce
induce voltages in the rotor windings due to transformation action.
The
stator windings can be distributed to achieve multiple Poles, to produce
several cycles of mmf (or field) around the air gap.
This
field establishes a spatially distributed sinusoidal flux density in the air
gap.
This
flux magnitude is constant and it’s rotate at synchronous speed.
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