BLDC stator slot than larger ones. Since total turns per phase are directly proportional to torque, putting all the needed turns (N per phase) in a single coil with smaller magnet wires and then paralleling the coils will yield extra space for more turns. This is a packing factor consideration.
The disadvantage of using parallel coils is that both sets of coil leads must be used to properly connect the coils (see Fig. 5.33). Figure 5.34 shows a representation of how two coils would be inserted into adjacent stator slots. Remember that there are 2 slots per coil per phase for this 2-pole 12-stator-slot winding pattern.