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33 Distributed 3-phase windings

33 Distributed 3-phase windings - Lecture 28 Distributed 3...

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Lecture 28 Distributed 3 φ Windings We saw that if we distribute the winding sinusoidally around the air gap, we would obtain a sinusoidally distributed magnetic field. ( ) cos 2 Ni H g θ θ = An important remark is that the total number of turns of a winding can be obtained as follows, 0 0 sin 2 dN N d d N d π π θ θ θ θ θ θ = = = = Suppose now that we distribute 3 independent windings (i.e., each winding is electrically insulated form the others) and carrying currents i a , i b , and i c . Schematically, The currents i a , i b , and i c are balanced. Each phase winding is distributed sinusoidally around the air gap along the slots. This means that in a slot there are turns of the three windings.

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