human2003
Joined: 05 Mar 2003
Posts: 110
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 13 Jun 2003 15:40 Brushless DC Motors |
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A dc machine has windings on both the stationary and
rotating members, and these circuits are in relative motion
whenever the armature (rotor) rotates. However, due to the
action of the commutator, the resultant mmf produced by
currents flowing in the rotor windings is stationary.
– The rotor windings appear to be stationary, magnetically.
– With constant current in the field (stator) winding, torque is
produced and rotation results owing to the force established
to align two stationary, orthogonal magnetic fields.
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