In the initial stage of motor design, combinations of various motor types, numbers of poles, and numbers of slots are considered to find a design that meets the requirements. When you use a combination of a winding editor and geometry library, you can perform parametric analysis changing the number of poles and slots.
In Fig. 1, the current values are adjusted so that the ampere-turns will be the same even if the number of slots is changed, and the design proposals are compared. With the 24 slots design we can achieve higher average torque with a low torque ripple. On the other hand, the low current density in the coils of the 12 slots design makes it more suitable for continuous driving.
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