Monday, 8 July 2013

MMF distributions in a 3-phase ac machine

WAVE SPACE DISTRIBUTIONS

Under balanced 3-phase sinusoidal excitation of an ac machine, the field space distribution produced by each phase is a sinusoidally distributed pulsating wave centered in its axis. The ABC [RGB] axes are 120o apart. The resultant field (in black) is a traveling wave of constant amplitude moving at a speed which corresponds to the excitation frequency.
 
 

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