Jim Hendershot

Figure I-A shows a (2) phase uni-polar design which is very common for small low cost fans. Figure I-B depicks a (3) phase (4) pole, (6) slot brushless motor with the coils wound around a single stator tooth the same as Figure I-A. Figure I-C is an (8) pole, (18) slot motor with (3) phases and a (2) slot coil winding pitch.

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