Brushless dc motor
The flux distribution produced by
the permanent North and
South magnets located on the rotor is
represented by the green space vector λf. A power-processing unit supplies
three-phase currents to the stator windings in such a manner that the resultant
stator current space vector Is
is 90o ahead of the rotor flux vector. The mmf distribution produced
by the stator currents flowing in the stationary three-phase windings is
equivalent to that produced by Is
flowing in a single sinusoidally-distributed rotating winding whose magnetic
axis lines up with Is as
illustrated in this animation.
Click the green note to produce a sound, and X to stop.
© M. Riaz
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