Brushless permanent magnet motors exhibit extensive design possibilities, encompassing any even number of magnet poles and any number of slots. Despite the vast array of permutations available, only a select few configurations optimally utilize the stator slots to enhance torque production efficiently. This chapter is devoted to elucidating the intricate principles necessary to pinpoint these optimal pole and slot count combinations, specifically for three-phase motors. Furthermore, it delves into methodologies for effectively determining the appropriate winding layout once a valid combination of pole and slot counts has been identified. The content is organized in a manner that provides clear guidance on optimizing motor design to achieve superior performance and efficiency, catering to advanced applications of brushless permanent magnet motors.