Optimizing the Slot-Pole Combination of a 250W Brushless DC Motor for e-Bike Conversion Kit

Electric bicycles, also known as e-bikes, have gained considerable popularity in Indonesia. However, this surge in popularity has not translated into a proportional increase in the number of e-bikes on the roads compared to conventional two-wheeled vehicles. One contributing factor to this phenomenon is the perceived inferiority of certain features offered by e-bikes, such as range and torque, in comparison to conventional counterparts. The primary determinant of an e-bike's price and performance lies in its electric propulsion system. Consequently, this study focuses on the design and modeling of a 250 W Brushless DC (BLDC) motor intended for an e-bike electric drive system, aimed at enhancing performance while minimizing costs. Various alternative designs featuring different pole-slot combinations were proposed and evaluated, with particular emphasis on selecting the design exhibiting optimal performance characteristics. Through rigorous analysis, it was determined that designs employing slot-pole combinations of 24/28 yielded the most promising results in enhancing the performance of the original design. Subsequent validation confirmed the efficacy of the selected alternative design, establishing its suitability for achieving the desired performance benchmarks.