Performance Analysis and Design of 250 Watt Outer Rotor BLDC Motor for Urban Electric Bicycles

This research is carried out related to the winding design of a BLDC motor for electric bicycles. Using a Bafang BLDC hub motor as a reference motor, which has 18 slot-20 pole configurations, a reverse-engineering process is carried out to obtain a more optimal design. An analysis is done related to the effect of each winding parameter on motor performance. Based on this analysis and the criteria for e-bike BLDC, a winding design is proposed. The design criteria for electric bicycles BLDC are determined by the needs of the rider, government regulations, and physical limitations. The proposed design is compared with the reference design regarding its performance. Finally, an analysis of the magnetic flux distribution was carried out for the proposed design. Based on the experiment, it was found that the proposed design has better performance than the reference design. It was found that the proposed design has the ability to generate 250 watts of constant power for a wider speed range and has higher efficiency.